[1237] | 1 | #include <stack>
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| 2 | #include <time.h>
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| 3 | #include <iomanip>
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| 4 |
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| 5 | #include "ViewCell.h"
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| 6 | #include "Plane3.h"
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| 7 | #include "VspTree.h"
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| 8 | #include "Mesh.h"
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| 9 | #include "common.h"
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| 10 | #include "Environment.h"
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| 11 | #include "Polygon3.h"
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| 12 | #include "Ray.h"
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| 13 | #include "AxisAlignedBox3.h"
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| 14 | #include "Exporter.h"
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| 15 | #include "Plane3.h"
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| 16 | #include "ViewCellsManager.h"
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| 17 | #include "Beam.h"
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| 18 | #include "KdTree.h"
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[1315] | 19 | #include "IntersectableWrapper.h"
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[1259] | 20 | #include "HierarchyManager.h"
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| 21 | #include "BvHierarchy.h"
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[1237] | 22 | #include "OspTree.h"
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| 23 |
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[1259] | 24 |
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[1302] | 25 |
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[1237] | 26 | namespace GtpVisibilityPreprocessor {
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| 27 |
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| 28 |
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| 29 | #define USE_FIXEDPOINT_T 0
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[1577] | 30 | #define COUNT_ORIGIN_OBJECTS 0
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[1237] | 31 |
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[1577] | 32 | /////////////
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[1237] | 33 | //-- static members
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| 34 |
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| 35 | VspTree *VspTree::VspSubdivisionCandidate::sVspTree = NULL;
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[1302] | 36 | int VspNode::sMailId = 1;
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[1237] | 37 |
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| 38 | // variable for debugging volume contribution for heuristics
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| 39 | static float debugVol;
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| 40 |
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| 41 |
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| 42 | // pvs penalty can be different from pvs size
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| 43 | inline static float EvalPvsPenalty(const int pvs,
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| 44 | const int lower,
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| 45 | const int upper)
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| 46 | {
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| 47 | // clamp to minmax values
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| 48 | if (pvs < lower)
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| 49 | {
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| 50 | return (float)lower;
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| 51 | }
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| 52 | else if (pvs > upper)
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| 53 | {
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| 54 | return (float)upper;
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| 55 | }
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| 56 | return (float)pvs;
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| 57 | }
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| 58 |
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[1570] | 59 | #if WORK_WITH_VIEWCELLS
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[1237] | 60 | static bool ViewCellHasMultipleReferences(Intersectable *obj,
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| 61 | ViewCell *vc,
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| 62 | bool checkOnlyMailed)
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| 63 | {
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| 64 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
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[1444] | 65 |
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[1237] | 66 | if (vdata)
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| 67 | {
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| 68 | // more than one view cell sees this object inside different kd cells
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| 69 | if (!checkOnlyMailed || !vdata->Mailed())
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| 70 | {
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| 71 | if (checkOnlyMailed)
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| 72 | vdata->Mail();
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| 73 | //Debug << "sumpdf: " << vdata->mSumPdf << endl;
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| 74 | if (vdata->mSumPdf > 1.5f)
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| 75 | return true;
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| 76 | }
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| 77 | }
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[1570] | 78 |
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[1237] | 79 | return false;
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| 80 | }
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| 81 |
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| 82 |
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[1570] | 83 | void VspTree::RemoveParentViewCellReferences(ViewCell *parent) const
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| 84 | {
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| 85 | KdLeaf::NewMail();
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| 86 |
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| 87 | // remove the parents from the object pvss
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| 88 | ObjectPvsMap::const_iterator oit, oit_end = parent->GetPvs().mEntries.end();
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| 89 |
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| 90 | for (oit = parent->GetPvs().mEntries.begin(); oit != oit_end; ++ oit)
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| 91 | {
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| 92 | Intersectable *object = (*oit).first;
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| 93 | // HACK: make sure that the view cell is removed from the pvs
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| 94 | const float high_contri = 9999999;
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| 95 |
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| 96 | // remove reference count of view cells
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| 97 | object->mViewCellPvs.RemoveSample(parent, high_contri);
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| 98 | }
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| 99 | }
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| 100 |
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| 101 |
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| 102 | void VspTree::AddViewCellReferences(ViewCell *vc) const
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| 103 | {
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| 104 | KdLeaf::NewMail();
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| 105 |
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| 106 | // Add front view cell to the object pvsss
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| 107 | ObjectPvsMap::const_iterator oit, oit_end = vc->GetPvs().mEntries.end();
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| 108 |
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| 109 | for (oit = vc->GetPvs().mEntries.begin(); oit != oit_end; ++ oit)
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| 110 | {
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| 111 | Intersectable *object = (*oit).first;
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| 112 |
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| 113 | // increase reference count of view cells
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| 114 | object->mViewCellPvs.AddSample(vc, 1);
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | #endif
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| 119 |
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[1237] | 120 | void VspTreeStatistics::Print(ostream &app) const
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| 121 | {
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| 122 | app << "=========== VspTree statistics ===============\n";
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| 123 |
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| 124 | app << setprecision(4);
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| 125 |
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| 126 | app << "#N_CTIME ( Construction time [s] )\n" << Time() << " \n";
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| 127 |
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| 128 | app << "#N_NODES ( Number of nodes )\n" << nodes << "\n";
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| 129 |
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| 130 | app << "#N_INTERIORS ( Number of interior nodes )\n" << Interior() << "\n";
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| 131 |
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| 132 | app << "#N_LEAVES ( Number of leaves )\n" << Leaves() << "\n";
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| 133 |
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| 134 | app << "#N_SPLITS ( Number of splits in axes x y z)\n";
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| 135 |
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| 136 | for (int i = 0; i < 3; ++ i)
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| 137 | app << splits[i] << " ";
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[1415] | 138 |
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[1237] | 139 | app << endl;
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| 140 |
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| 141 | app << "#N_PMAXDEPTHLEAVES ( Percentage of leaves at maximum depth )\n"
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| 142 | << maxDepthNodes * 100 / (double)Leaves() << endl;
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| 143 |
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| 144 | app << "#N_PMINPVSLEAVES ( Percentage of leaves with mininimal PVS )\n"
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| 145 | << minPvsNodes * 100 / (double)Leaves() << endl;
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| 146 |
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| 147 | app << "#N_PMINRAYSLEAVES ( Percentage of leaves with minimal number of rays)\n"
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| 148 | << minRaysNodes * 100 / (double)Leaves() << endl;
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| 149 |
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| 150 | app << "#N_MAXCOSTNODES ( Percentage of leaves with terminated because of max cost ratio )\n"
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| 151 | << maxCostNodes * 100 / (double)Leaves() << endl;
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| 152 |
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| 153 | app << "#N_PMINPROBABILITYLEAVES ( Percentage of leaves with mininum probability )\n"
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| 154 | << minProbabilityNodes * 100 / (double)Leaves() << endl;
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| 155 |
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| 156 | app << "#N_PMAXRAYCONTRIBLEAVES ( Percentage of leaves with maximal ray contribution )\n"
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| 157 | << maxRayContribNodes * 100 / (double)Leaves() << endl;
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| 158 |
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| 159 | app << "#N_PMAXDEPTH ( Maximal reached depth )\n" << maxDepth << endl;
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| 160 |
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| 161 | app << "#N_PMINDEPTH ( Minimal reached depth )\n" << minDepth << endl;
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| 162 |
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| 163 | app << "#AVGDEPTH ( average depth )\n" << AvgDepth() << endl;
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| 164 |
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| 165 | app << "#N_INVALIDLEAVES (number of invalid leaves )\n" << invalidLeaves << endl;
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| 166 |
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[1449] | 167 | app << "#AVGRAYS (number of rays / leaf)\n" << AvgRays() << endl;
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[1444] | 168 |
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[1449] | 169 | app << "#N_GLOBALCOSTMISSES ( Global cost misses )\n" << mGlobalCostMisses << endl;
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[1237] | 170 |
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| 171 | app << "========== END OF VspTree statistics ==========\n";
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| 172 | }
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| 173 |
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| 174 |
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| 175 |
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| 176 | /******************************************************************/
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| 177 | /* class VspNode implementation */
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| 178 | /******************************************************************/
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| 179 |
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| 180 |
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| 181 | VspNode::VspNode():
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| 182 | mParent(NULL), mTreeValid(true), mTimeStamp(0)
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| 183 | {}
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| 184 |
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| 185 |
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| 186 | VspNode::VspNode(VspInterior *parent):
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| 187 | mParent(parent), mTreeValid(true)
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| 188 | {}
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| 189 |
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| 190 |
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| 191 | bool VspNode::IsRoot() const
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| 192 | {
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| 193 | return mParent == NULL;
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| 194 | }
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| 195 |
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| 196 |
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| 197 | VspInterior *VspNode::GetParent()
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| 198 | {
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| 199 | return mParent;
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| 200 | }
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| 201 |
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| 202 |
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| 203 | void VspNode::SetParent(VspInterior *parent)
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| 204 | {
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| 205 | mParent = parent;
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| 206 | }
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| 207 |
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| 208 |
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| 209 | bool VspNode::IsSibling(VspNode *n) const
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| 210 | {
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| 211 | return ((this != n) && mParent &&
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| 212 | (mParent->GetFront() == n) || (mParent->GetBack() == n));
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| 213 | }
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| 214 |
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| 215 |
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| 216 | int VspNode::GetDepth() const
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| 217 | {
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| 218 | int depth = 0;
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| 219 | VspNode *p = mParent;
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| 220 |
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| 221 | while (p)
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| 222 | {
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| 223 | p = p->mParent;
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| 224 | ++ depth;
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| 225 | }
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| 226 |
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| 227 | return depth;
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| 228 | }
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| 229 |
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| 230 |
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| 231 | bool VspNode::TreeValid() const
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| 232 | {
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| 233 | return mTreeValid;
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| 234 | }
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| 235 |
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| 236 |
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| 237 | void VspNode::SetTreeValid(const bool v)
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| 238 | {
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| 239 | mTreeValid = v;
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| 240 | }
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| 241 |
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| 242 |
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[1444] | 243 |
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[1237] | 244 | /****************************************************************/
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| 245 | /* class VspInterior implementation */
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| 246 | /****************************************************************/
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| 247 |
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| 248 |
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| 249 | VspInterior::VspInterior(const AxisAlignedPlane &plane):
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| 250 | mPlane(plane), mFront(NULL), mBack(NULL)
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| 251 | {}
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| 252 |
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| 253 |
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| 254 | VspInterior::~VspInterior()
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| 255 | {
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| 256 | DEL_PTR(mFront);
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| 257 | DEL_PTR(mBack);
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| 258 | }
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| 259 |
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| 260 |
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| 261 | bool VspInterior::IsLeaf() const
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| 262 | {
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| 263 | return false;
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| 264 | }
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| 265 |
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| 266 |
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| 267 | VspNode *VspInterior::GetBack()
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| 268 | {
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| 269 | return mBack;
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| 270 | }
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| 271 |
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| 272 |
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| 273 | VspNode *VspInterior::GetFront()
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| 274 | {
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| 275 | return mFront;
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| 276 | }
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| 277 |
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| 278 |
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| 279 | AxisAlignedPlane VspInterior::GetPlane() const
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| 280 | {
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| 281 | return mPlane;
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| 282 | }
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| 283 |
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| 284 |
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| 285 | float VspInterior::GetPosition() const
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| 286 | {
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| 287 | return mPlane.mPosition;
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| 288 | }
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| 289 |
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| 290 |
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| 291 | int VspInterior::GetAxis() const
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| 292 | {
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| 293 | return mPlane.mAxis;
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| 294 | }
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| 295 |
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| 296 |
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| 297 | void VspInterior::ReplaceChildLink(VspNode *oldChild, VspNode *newChild)
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| 298 | {
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| 299 | if (mBack == oldChild)
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| 300 | mBack = newChild;
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| 301 | else
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| 302 | mFront = newChild;
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| 303 | }
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| 304 |
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| 305 |
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| 306 | void VspInterior::SetupChildLinks(VspNode *front, VspNode *back)
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| 307 | {
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| 308 | mBack = back;
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| 309 | mFront = front;
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| 310 | }
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| 311 |
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| 312 |
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| 313 | AxisAlignedBox3 VspInterior::GetBoundingBox() const
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| 314 | {
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| 315 | return mBoundingBox;
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| 316 | }
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| 317 |
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| 318 |
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| 319 | void VspInterior::SetBoundingBox(const AxisAlignedBox3 &box)
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| 320 | {
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| 321 | mBoundingBox = box;
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| 322 | }
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| 323 |
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| 324 |
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| 325 | int VspInterior::Type() const
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| 326 | {
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| 327 | return Interior;
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| 328 | }
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| 329 |
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| 330 |
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| 331 |
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| 332 | /****************************************************************/
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| 333 | /* class VspLeaf implementation */
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| 334 | /****************************************************************/
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| 335 |
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| 336 |
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[1302] | 337 | VspLeaf::VspLeaf(): mViewCell(NULL), mPvs(NULL), mSubdivisionCandidate(NULL)
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[1237] | 338 | {
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| 339 | }
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| 340 |
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| 341 |
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| 342 | VspLeaf::~VspLeaf()
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| 343 | {
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| 344 | DEL_PTR(mPvs);
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[1418] | 345 |
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| 346 | VssRayContainer::const_iterator vit, vit_end = mVssRays.end();
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| 347 | for (vit = mVssRays.begin(); vit != vit_end; ++ vit)
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| 348 | {
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| 349 | VssRay *ray = *vit;
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| 350 | ray->Unref();
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| 351 |
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| 352 | if (!ray->IsActive())
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| 353 | delete ray;
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| 354 | }
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| 355 | //CLEAR_CONTAINER(mVssRays);
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[1237] | 356 | }
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| 357 |
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| 358 |
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| 359 | int VspLeaf::Type() const
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| 360 | {
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| 361 | return Leaf;
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| 362 | }
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| 363 |
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| 364 |
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| 365 | VspLeaf::VspLeaf(ViewCellLeaf *viewCell):
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| 366 | mViewCell(viewCell)
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| 367 | {
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| 368 | }
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| 369 |
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| 370 |
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| 371 | VspLeaf::VspLeaf(VspInterior *parent):
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| 372 | VspNode(parent), mViewCell(NULL), mPvs(NULL)
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| 373 | {}
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| 374 |
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| 375 |
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| 376 | VspLeaf::VspLeaf(VspInterior *parent, ViewCellLeaf *viewCell):
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| 377 | VspNode(parent), mViewCell(viewCell), mPvs(NULL)
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| 378 | {
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| 379 | }
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| 380 |
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[1588] | 381 |
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[1237] | 382 | ViewCellLeaf *VspLeaf::GetViewCell() const
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| 383 | {
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| 384 | return mViewCell;
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| 385 | }
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| 386 |
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[1588] | 387 |
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[1237] | 388 | void VspLeaf::SetViewCell(ViewCellLeaf *viewCell)
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| 389 | {
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| 390 | mViewCell = viewCell;
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| 391 | }
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| 392 |
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| 393 |
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| 394 | bool VspLeaf::IsLeaf() const
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| 395 | {
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| 396 | return true;
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| 397 | }
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| 398 |
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| 399 |
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[1421] | 400 |
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[1237] | 401 | /*************************************************************************/
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| 402 | /* class VspTree implementation */
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| 403 | /*************************************************************************/
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| 404 |
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| 405 |
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| 406 | VspTree::VspTree():
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| 407 | mRoot(NULL),
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| 408 | mOutOfBoundsCell(NULL),
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[1421] | 409 | mStoreRays(false),
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[1237] | 410 | mTimeStamp(1),
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[1259] | 411 | mHierarchyManager(NULL)
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[1237] | 412 | {
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[1444] | 413 | mLocalSubdivisionCandidates = new vector<SortableEntry>;
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| 414 |
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[1237] | 415 | bool randomize = false;
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| 416 | Environment::GetSingleton()->GetBoolValue("VspTree.Construction.randomize", randomize);
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| 417 | if (randomize)
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| 418 | Randomize(); // initialise random generator for heuristics
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| 419 |
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[1444] | 420 | char subdivisionStatsLog[100];
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| 421 | Environment::GetSingleton()->GetStringValue("VspTree.subdivisionStats", subdivisionStatsLog);
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| 422 | mSubdivisionStats.open(subdivisionStatsLog);
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| 423 |
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| 424 | /////////////
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[1237] | 425 | //-- termination criteria for autopartition
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[1444] | 426 |
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[1237] | 427 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.maxDepth", mTermMaxDepth);
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| 428 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.minPvs", mTermMinPvs);
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| 429 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.minRays", mTermMinRays);
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| 430 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.minProbability", mTermMinProbability);
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| 431 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.maxRayContribution", mTermMaxRayContribution);
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| 432 |
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| 433 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.missTolerance", mTermMissTolerance);
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| 434 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.maxViewCells", mMaxViewCells);
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[1444] | 435 | // max cost ratio for early tree termination
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[1237] | 436 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.maxCostRatio", mTermMaxCostRatio);
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| 437 |
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| 438 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.minGlobalCostRatio", mTermMinGlobalCostRatio);
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| 439 | Environment::GetSingleton()->GetIntValue("VspTree.Termination.globalCostMissTolerance", mTermGlobalCostMissTolerance);
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| 440 |
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[1444] | 441 | Environment::GetSingleton()->GetFloatValue("VspTree.maxStaticMemory", mMaxMemory);
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| 442 |
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| 443 |
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| 444 | //////////////
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[1237] | 445 | //-- factors for bsp tree split plane heuristics
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| 446 |
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[1444] | 447 | Environment::GetSingleton()->GetFloatValue("VspTree.Termination.ct_div_ci", mCtDivCi);
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[1237] | 448 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.epsilon", mEpsilon);
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[1444] | 449 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.minBand", mMinBand);
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| 450 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.maxBand", mMaxBand);
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| 451 | Environment::GetSingleton()->GetIntValue("VspTree.maxTests", mMaxTests);
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[1237] | 452 |
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[1444] | 453 | Environment::GetSingleton()->GetFloatValue("VspTree.Construction.renderCostDecreaseWeight", mRenderCostDecreaseWeight);
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| 454 |
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[1237] | 455 | // if only the driving axis is used for axis aligned split
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| 456 | Environment::GetSingleton()->GetBoolValue("VspTree.splitUseOnlyDrivingAxis", mOnlyDrivingAxis);
|
---|
| 457 | Environment::GetSingleton()->GetBoolValue("VspTree.useCostHeuristics", mUseCostHeuristics);
|
---|
| 458 | Environment::GetSingleton()->GetBoolValue("VspTree.simulateOctree", mCirculatingAxis);
|
---|
| 459 |
|
---|
| 460 |
|
---|
[1444] | 461 | //////////////
|
---|
[1237] | 462 | //-- debug output
|
---|
| 463 |
|
---|
| 464 | Debug << "******* VSP options ******** " << endl;
|
---|
| 465 |
|
---|
| 466 | Debug << "max depth: " << mTermMaxDepth << endl;
|
---|
| 467 | Debug << "min PVS: " << mTermMinPvs << endl;
|
---|
| 468 | Debug << "min probabiliy: " << mTermMinProbability << endl;
|
---|
| 469 | Debug << "min rays: " << mTermMinRays << endl;
|
---|
| 470 | Debug << "max ray contri: " << mTermMaxRayContribution << endl;
|
---|
| 471 | Debug << "max cost ratio: " << mTermMaxCostRatio << endl;
|
---|
| 472 | Debug << "miss tolerance: " << mTermMissTolerance << endl;
|
---|
| 473 | Debug << "max view cells: " << mMaxViewCells << endl;
|
---|
| 474 | Debug << "randomize: " << randomize << endl;
|
---|
| 475 |
|
---|
| 476 | Debug << "min global cost ratio: " << mTermMinGlobalCostRatio << endl;
|
---|
| 477 | Debug << "global cost miss tolerance: " << mTermGlobalCostMissTolerance << endl;
|
---|
| 478 | Debug << "only driving axis: " << mOnlyDrivingAxis << endl;
|
---|
| 479 | Debug << "max memory: " << mMaxMemory << endl;
|
---|
| 480 | Debug << "use cost heuristics: " << mUseCostHeuristics << endl;
|
---|
| 481 | Debug << "subdivision stats log: " << subdivisionStatsLog << endl;
|
---|
| 482 | Debug << "render cost decrease weight: " << mRenderCostDecreaseWeight << endl;
|
---|
| 483 |
|
---|
| 484 | Debug << "circulating axis: " << mCirculatingAxis << endl;
|
---|
| 485 | Debug << "minband: " << mMinBand << endl;
|
---|
| 486 | Debug << "maxband: " << mMaxBand << endl;
|
---|
| 487 |
|
---|
| 488 | Debug << endl;
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 |
|
---|
| 492 | VspViewCell *VspTree::GetOutOfBoundsCell()
|
---|
| 493 | {
|
---|
| 494 | return mOutOfBoundsCell;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 |
|
---|
| 498 | VspViewCell *VspTree::GetOrCreateOutOfBoundsCell()
|
---|
| 499 | {
|
---|
| 500 | if (!mOutOfBoundsCell)
|
---|
| 501 | {
|
---|
| 502 | mOutOfBoundsCell = new VspViewCell();
|
---|
| 503 | mOutOfBoundsCell->SetId(-1);
|
---|
| 504 | mOutOfBoundsCell->SetValid(false);
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | return mOutOfBoundsCell;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 |
|
---|
| 511 | const VspTreeStatistics &VspTree::GetStatistics() const
|
---|
| 512 | {
|
---|
| 513 | return mVspStats;
|
---|
| 514 | }
|
---|
| 515 |
|
---|
| 516 |
|
---|
| 517 | VspTree::~VspTree()
|
---|
| 518 | {
|
---|
| 519 | DEL_PTR(mRoot);
|
---|
| 520 | DEL_PTR(mLocalSubdivisionCandidates);
|
---|
| 521 | }
|
---|
| 522 |
|
---|
| 523 |
|
---|
| 524 | void VspTree::ComputeBoundingBox(const VssRayContainer &rays,
|
---|
| 525 | AxisAlignedBox3 *forcedBoundingBox)
|
---|
| 526 | {
|
---|
| 527 | if (forcedBoundingBox)
|
---|
| 528 | {
|
---|
| 529 | mBoundingBox = *forcedBoundingBox;
|
---|
[1379] | 530 | return;
|
---|
[1237] | 531 | }
|
---|
[1379] | 532 |
|
---|
| 533 | //////////////////////////////////////////////
|
---|
| 534 | // bounding box of view space includes all visibility events
|
---|
| 535 | mBoundingBox.Initialize();
|
---|
| 536 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 537 |
|
---|
| 538 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
[1237] | 539 | {
|
---|
[1379] | 540 | VssRay *ray = *rit;
|
---|
[1237] | 541 |
|
---|
[1379] | 542 | mBoundingBox.Include(ray->GetTermination());
|
---|
| 543 | mBoundingBox.Include(ray->GetOrigin());
|
---|
[1237] | 544 | }
|
---|
| 545 | }
|
---|
| 546 |
|
---|
| 547 |
|
---|
| 548 | void VspTree::AddSubdivisionStats(const int viewCells,
|
---|
| 549 | const float renderCostDecr,
|
---|
| 550 | const float totalRenderCost,
|
---|
| 551 | const float avgRenderCost)
|
---|
| 552 | {
|
---|
| 553 | mSubdivisionStats
|
---|
| 554 | << "#ViewCells\n" << viewCells << endl
|
---|
| 555 | << "#RenderCostDecrease\n" << renderCostDecr << endl
|
---|
| 556 | << "#TotalRenderCost\n" << totalRenderCost << endl
|
---|
| 557 | << "#AvgRenderCost\n" << avgRenderCost << endl;
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 |
|
---|
[1640] | 561 | // $$matt temporary: number of rayrefs + pvs should be in there, but
|
---|
| 562 | // commented out for testing
|
---|
[1237] | 563 | float VspTree::GetMemUsage() const
|
---|
| 564 | {
|
---|
| 565 | return (float)
|
---|
[1640] | 566 | (sizeof(VspTree)
|
---|
| 567 | + mVspStats.Leaves() * sizeof(VspLeaf)
|
---|
| 568 | + mVspStats.Leaves() * sizeof(VspViewCell)
|
---|
| 569 | + mVspStats.Interior() * sizeof(VspInterior)
|
---|
| 570 | //+ mVspStats.pvs * sizeof(PvsData)
|
---|
| 571 | //+ mVspStats.rayRefs * sizeof(RayInfo)
|
---|
| 572 | ) / (1024.0f * 1024.0f);
|
---|
[1237] | 573 | }
|
---|
| 574 |
|
---|
| 575 |
|
---|
[1251] | 576 | inline bool VspTree::LocalTerminationCriteriaMet(const VspTraversalData &data) const
|
---|
[1237] | 577 | {
|
---|
[1294] | 578 | const bool localTerminationCriteriaMet = (0
|
---|
[1370] | 579 | || ((int)data.mRays->size() <= mTermMinRays)
|
---|
| 580 | || (data.mPvs <= mTermMinPvs)
|
---|
| 581 | || (data.mProbability <= mTermMinProbability)
|
---|
[1415] | 582 | //|| (data.GetAvgRayContribution() > mTermMaxRayContribution)
|
---|
[1370] | 583 | || (data.mDepth >= mTermMaxDepth)
|
---|
[1237] | 584 | );
|
---|
| 585 |
|
---|
[1610] | 586 | #if _DEBUG
|
---|
| 587 | if (localTerminationCriteriaMet)
|
---|
[1237] | 588 | {
|
---|
[1415] | 589 | Debug << "local termination criteria met:" << endl;
|
---|
[1237] | 590 | Debug << "rays: " << (int)data.mRays->size() << " " << mTermMinRays << endl;
|
---|
| 591 | Debug << "pvs: " << data.mPvs << " " << mTermMinPvs << endl;
|
---|
| 592 | Debug << "p: " << data.mProbability << " " << mTermMinProbability << endl;
|
---|
| 593 | Debug << "avg contri: " << data.GetAvgRayContribution() << " " << mTermMaxRayContribution << endl;
|
---|
| 594 | Debug << "depth " << data.mDepth << " " << mTermMaxDepth << endl;
|
---|
| 595 | }
|
---|
[1610] | 596 | #endif
|
---|
[1294] | 597 | return localTerminationCriteriaMet;
|
---|
[1237] | 598 | }
|
---|
| 599 |
|
---|
| 600 |
|
---|
[1251] | 601 | inline bool VspTree::GlobalTerminationCriteriaMet(const VspTraversalData &data) const
|
---|
[1237] | 602 | {
|
---|
[1610] | 603 | // note: to track for global cost misses does not really
|
---|
| 604 | // make sense because cost termination happens in the hierarchy mananger
|
---|
| 605 |
|
---|
[1294] | 606 | const bool terminationCriteriaMet = (0
|
---|
| 607 | // || mOutOfMemory
|
---|
| 608 | || (mVspStats.Leaves() >= mMaxViewCells)
|
---|
[1571] | 609 | // || (mVspStats.mGlobalCostMisses >= mTermGlobalCostMissTolerance)
|
---|
[1237] | 610 | );
|
---|
| 611 |
|
---|
[1610] | 612 | #if _DEBUG
|
---|
| 613 | if (terminationCriteriaMet)
|
---|
[1237] | 614 | {
|
---|
[1421] | 615 | Debug << "vsp global termination criteria met:" << endl;
|
---|
[1449] | 616 | Debug << "cost misses: " << mVspStats.mGlobalCostMisses << " " << mTermGlobalCostMissTolerance << endl;
|
---|
[1237] | 617 | Debug << "leaves: " << mVspStats.Leaves() << " " << mMaxViewCells << endl;
|
---|
| 618 | }
|
---|
[1610] | 619 | #endif
|
---|
[1522] | 620 |
|
---|
[1237] | 621 | return terminationCriteriaMet;
|
---|
| 622 | }
|
---|
| 623 |
|
---|
| 624 |
|
---|
| 625 | void VspTree::CreateViewCell(VspTraversalData &tData, const bool updatePvs)
|
---|
| 626 | {
|
---|
[1576] | 627 | ///////////////
|
---|
[1237] | 628 | //-- create new view cell
|
---|
[1577] | 629 |
|
---|
[1576] | 630 | VspLeaf *leaf = tData.mNode;
|
---|
[1577] | 631 |
|
---|
[1237] | 632 | VspViewCell *viewCell = new VspViewCell();
|
---|
| 633 | leaf->SetViewCell(viewCell);
|
---|
| 634 |
|
---|
| 635 | int conSamp = 0;
|
---|
| 636 | float sampCon = 0.0f;
|
---|
| 637 |
|
---|
| 638 | if (updatePvs)
|
---|
| 639 | {
|
---|
[1576] | 640 | // update pvs of view cell
|
---|
[1237] | 641 | AddSamplesToPvs(leaf, *tData.mRays, sampCon, conSamp);
|
---|
| 642 |
|
---|
| 643 | // update scalar pvs size value
|
---|
| 644 | ObjectPvs &pvs = viewCell->GetPvs();
|
---|
| 645 | mViewCellsManager->UpdateScalarPvsSize(viewCell, pvs.CountObjectsInPvs(), pvs.GetSize());
|
---|
| 646 |
|
---|
| 647 | mVspStats.contributingSamples += conSamp;
|
---|
| 648 | mVspStats.sampleContributions += (int)sampCon;
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | if (mStoreRays)
|
---|
| 652 | {
|
---|
[1418] | 653 | ///////////
|
---|
| 654 | //-- store sampling rays
|
---|
[1577] | 655 |
|
---|
[1576] | 656 | RayInfoContainer::const_iterator it, it_end = tData.mRays->end();
|
---|
[1237] | 657 |
|
---|
| 658 | for (it = tData.mRays->begin(); it != it_end; ++ it)
|
---|
| 659 | {
|
---|
| 660 | (*it).mRay->Ref();
|
---|
[1576] | 661 | // note: should rather store rays with view cell
|
---|
[1237] | 662 | leaf->mVssRays.push_back((*it).mRay);
|
---|
| 663 | }
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 | // set view cell values
|
---|
[1551] | 667 | viewCell->mLeaves.push_back(leaf);
|
---|
[1237] | 668 |
|
---|
| 669 | viewCell->SetVolume(tData.mProbability);
|
---|
| 670 | leaf->mProbability = tData.mProbability;
|
---|
| 671 | }
|
---|
| 672 |
|
---|
| 673 |
|
---|
| 674 | void VspTree::EvalSubdivisionStats(const SubdivisionCandidate &sc)
|
---|
| 675 | {
|
---|
| 676 | const float costDecr = sc.GetRenderCostDecrease();
|
---|
| 677 |
|
---|
| 678 | AddSubdivisionStats(mVspStats.Leaves(),
|
---|
| 679 | costDecr,
|
---|
| 680 | mTotalCost,
|
---|
| 681 | (float)mTotalPvsSize / (float)mVspStats.Leaves());
|
---|
| 682 | }
|
---|
| 683 |
|
---|
| 684 |
|
---|
| 685 | VspNode *VspTree::Subdivide(SplitQueue &tQueue,
|
---|
| 686 | SubdivisionCandidate *splitCandidate,
|
---|
| 687 | const bool globalCriteriaMet)
|
---|
| 688 | {
|
---|
| 689 | // todo remove dynamic cast
|
---|
[1297] | 690 | VspSubdivisionCandidate *sc =
|
---|
| 691 | dynamic_cast<VspSubdivisionCandidate *>(splitCandidate);
|
---|
[1237] | 692 |
|
---|
[1302] | 693 | VspTraversalData &tData = sc->mParentData;
|
---|
[1237] | 694 | VspNode *newNode = tData.mNode;
|
---|
| 695 |
|
---|
| 696 | if (!LocalTerminationCriteriaMet(tData) && !globalCriteriaMet)
|
---|
| 697 | {
|
---|
[1633] | 698 | ///////////
|
---|
[1297] | 699 | //-- continue subdivision
|
---|
[1633] | 700 |
|
---|
[1237] | 701 | VspTraversalData tFrontData;
|
---|
| 702 | VspTraversalData tBackData;
|
---|
| 703 |
|
---|
| 704 | // create new interior node and two leaf node
|
---|
| 705 | const AxisAlignedPlane splitPlane = sc->mSplitPlane;
|
---|
[1576] | 706 | const int maxCostMisses = sc->GetMaxCostMisses();
|
---|
[1297] | 707 |
|
---|
[1237] | 708 | newNode = SubdivideNode(splitPlane, tData, tFrontData, tBackData);
|
---|
| 709 |
|
---|
| 710 | // how often was max cost ratio missed in this branch?
|
---|
| 711 | tFrontData.mMaxCostMisses = maxCostMisses;
|
---|
| 712 | tBackData.mMaxCostMisses = maxCostMisses;
|
---|
| 713 |
|
---|
| 714 | mTotalCost -= sc->GetRenderCostDecrease();
|
---|
| 715 | mTotalPvsSize += tFrontData.mPvs + tBackData.mPvs - tData.mPvs;
|
---|
| 716 |
|
---|
| 717 | // subdivision statistics
|
---|
| 718 | if (1) EvalSubdivisionStats(*sc);
|
---|
| 719 |
|
---|
[1633] | 720 | /////////////
|
---|
[1237] | 721 | //-- evaluate new split candidates for global greedy cost heuristics
|
---|
| 722 |
|
---|
| 723 | VspSubdivisionCandidate *frontCandidate = new VspSubdivisionCandidate(tFrontData);
|
---|
| 724 | VspSubdivisionCandidate *backCandidate = new VspSubdivisionCandidate(tBackData);
|
---|
| 725 |
|
---|
| 726 | EvalSubdivisionCandidate(*frontCandidate);
|
---|
| 727 | EvalSubdivisionCandidate(*backCandidate);
|
---|
| 728 |
|
---|
[1297] | 729 | // cross reference
|
---|
| 730 | tFrontData.mNode->SetSubdivisionCandidate(frontCandidate);
|
---|
| 731 | tBackData.mNode->SetSubdivisionCandidate(backCandidate);
|
---|
| 732 |
|
---|
[1237] | 733 | tQueue.Push(frontCandidate);
|
---|
| 734 | tQueue.Push(backCandidate);
|
---|
[1633] | 735 |
|
---|
| 736 | // note: leaf is not destroyed because it is needed to collect
|
---|
| 737 | // dirty candidates in hierarchy manager
|
---|
[1237] | 738 | }
|
---|
| 739 |
|
---|
| 740 | if (newNode->IsLeaf()) // subdivision terminated
|
---|
| 741 | {
|
---|
| 742 | // view cell is created during subdivision
|
---|
| 743 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(newNode);
|
---|
| 744 | ViewCell *viewCell = leaf->GetViewCell();
|
---|
| 745 |
|
---|
| 746 | int conSamp = 0;
|
---|
| 747 | float sampCon = 0.0f;
|
---|
| 748 |
|
---|
| 749 | #if 0
|
---|
[1418] | 750 | /////////////
|
---|
[1237] | 751 | //-- store pvs optained from rays
|
---|
[1421] | 752 |
|
---|
[1237] | 753 | AddSamplesToPvs(leaf, *tData.mRays, sampCon, conSamp);
|
---|
| 754 |
|
---|
| 755 | // update scalar pvs size value
|
---|
| 756 | ObjectPvs &pvs = viewCell->GetPvs();
|
---|
| 757 | mViewCellsManager->UpdateScalarPvsSize(viewCell, pvs.CountObjectsInPvs(), pvs.GetSize());
|
---|
| 758 |
|
---|
| 759 | mVspStats.contributingSamples += conSamp;
|
---|
| 760 | mVspStats.sampleContributions += (int)sampCon;
|
---|
| 761 | #endif
|
---|
| 762 | if (mStoreRays)
|
---|
| 763 | {
|
---|
[1418] | 764 | //////////
|
---|
| 765 | //-- store rays piercing this view cell
|
---|
[1237] | 766 | RayInfoContainer::const_iterator it, it_end = tData.mRays->end();
|
---|
| 767 | for (it = tData.mRays->begin(); it != it_end; ++ it)
|
---|
| 768 | {
|
---|
| 769 | (*it).mRay->Ref();
|
---|
| 770 | leaf->mVssRays.push_back((*it).mRay);
|
---|
[1418] | 771 | //leaf->mVssRays.push_back(new VssRay(*(*it).mRay));
|
---|
[1237] | 772 | }
|
---|
| 773 | }
|
---|
| 774 |
|
---|
| 775 | // finally evaluate statistics for this leaf
|
---|
| 776 | EvaluateLeafStats(tData);
|
---|
[1305] | 777 | // detach subdivision candidate: this leaf is no candidate for
|
---|
| 778 | // splitting anymore
|
---|
| 779 | tData.mNode->SetSubdivisionCandidate(NULL);
|
---|
[1294] | 780 | // detach node so it won't get deleted
|
---|
| 781 | tData.mNode = NULL;
|
---|
[1237] | 782 | }
|
---|
| 783 |
|
---|
| 784 | return newNode;
|
---|
| 785 | }
|
---|
| 786 |
|
---|
| 787 |
|
---|
| 788 | void VspTree::EvalSubdivisionCandidate(VspSubdivisionCandidate &splitCandidate)
|
---|
| 789 | {
|
---|
| 790 | float frontProb;
|
---|
| 791 | float backProb;
|
---|
| 792 |
|
---|
| 793 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(splitCandidate.mParentData.mNode);
|
---|
| 794 |
|
---|
| 795 | // compute locally best split plane
|
---|
[1291] | 796 | const float ratio = SelectSplitPlane(splitCandidate.mParentData,
|
---|
| 797 | splitCandidate.mSplitPlane,
|
---|
| 798 | frontProb,
|
---|
| 799 | backProb);
|
---|
[1237] | 800 |
|
---|
[1297] | 801 | const bool maxCostRatioViolated = mTermMaxCostRatio < ratio;
|
---|
[1237] | 802 |
|
---|
[1291] | 803 | // max cost threshold violated?
|
---|
[1576] | 804 | splitCandidate.SetMaxCostMisses(maxCostRatioViolated ?
|
---|
[1297] | 805 | splitCandidate.mParentData.mMaxCostMisses + 1:
|
---|
[1576] | 806 | splitCandidate.mParentData.mMaxCostMisses);
|
---|
[1237] | 807 |
|
---|
| 808 | // compute global decrease in render cost
|
---|
[1577] | 809 | float oldRenderCost;
|
---|
[1237] | 810 | const float renderCostDecr = EvalRenderCostDecrease(splitCandidate.mSplitPlane,
|
---|
| 811 | splitCandidate.mParentData,
|
---|
| 812 | oldRenderCost);
|
---|
| 813 |
|
---|
| 814 | splitCandidate.SetRenderCostDecrease(renderCostDecr);
|
---|
| 815 |
|
---|
[1576] | 816 | // the increase in pvs entries num induced by this split
|
---|
| 817 | const int pvsEntriesIncr = EvalPvsEntriesIncr(splitCandidate);
|
---|
| 818 | splitCandidate.SetPvsEntriesIncr(pvsEntriesIncr);
|
---|
| 819 |
|
---|
[1313] | 820 | #if 0
|
---|
[1294] | 821 | const float priority = (float)-splitCandidate.mParentData.mDepth;
|
---|
[1302] | 822 | #else
|
---|
[1237] | 823 | // take render cost of node into account
|
---|
| 824 | // otherwise danger of being stuck in a local minimum!!
|
---|
| 825 | const float factor = mRenderCostDecreaseWeight;
|
---|
| 826 | const float priority = factor * renderCostDecr + (1.0f - factor) * oldRenderCost;
|
---|
| 827 | #endif
|
---|
| 828 |
|
---|
| 829 | splitCandidate.SetPriority(priority);
|
---|
| 830 | }
|
---|
| 831 |
|
---|
| 832 |
|
---|
[1633] | 833 | float VspTree::EvalPriority(const VspSubdivisionCandidate &splitCandidate) const
|
---|
| 834 | {
|
---|
| 835 | // compute global decrease in render cost
|
---|
| 836 | float oldRenderCost;
|
---|
| 837 | const float renderCostDecr = EvalRenderCostDecrease(splitCandidate.mSplitPlane,
|
---|
| 838 | splitCandidate.mParentData,
|
---|
| 839 | oldRenderCost);
|
---|
| 840 |
|
---|
| 841 | #if 0
|
---|
| 842 | const float priority = (float)-splitCandidate.mParentData.mDepth;
|
---|
| 843 | #else
|
---|
| 844 | // take render cost of node into account
|
---|
| 845 | // otherwise danger of being stuck in a local minimum!!
|
---|
| 846 | const float factor = mRenderCostDecreaseWeight;
|
---|
| 847 | const float priority = factor * renderCostDecr + (1.0f - factor) * oldRenderCost;
|
---|
| 848 | #endif
|
---|
| 849 |
|
---|
| 850 | return priority;
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 |
|
---|
[1576] | 854 | int VspTree::EvalPvsEntriesIncr(VspSubdivisionCandidate &splitCandidate) const
|
---|
| 855 | {
|
---|
| 856 | float oldPvsSize = 0;
|
---|
| 857 | float fPvsSize = 0;
|
---|
| 858 | float bPvsSize = 0;
|
---|
| 859 |
|
---|
| 860 | AxisAlignedPlane candidatePlane = splitCandidate.mSplitPlane;
|
---|
[1580] | 861 |
|
---|
| 862 | Intersectable::NewMail(3);
|
---|
| 863 | KdLeaf::NewMail(3);
|
---|
| 864 | BvhLeaf::NewMail(3);
|
---|
[1576] | 865 |
|
---|
[1580] | 866 | RayInfoContainer::const_iterator rit, rit_end = splitCandidate.mParentData.mRays->end();
|
---|
| 867 |
|
---|
| 868 | // this is the main ray classification loop!
|
---|
[1576] | 869 | for(rit = splitCandidate.mParentData.mRays->begin(); rit != rit_end; ++ rit)
|
---|
| 870 | {
|
---|
| 871 | VssRay *ray = (*rit).mRay;
|
---|
| 872 | RayInfo rayInf = *rit;
|
---|
| 873 |
|
---|
| 874 | float t;
|
---|
| 875 | // classify ray
|
---|
| 876 | const int cf =
|
---|
| 877 | rayInf.ComputeRayIntersection(candidatePlane.mAxis,
|
---|
| 878 | candidatePlane.mPosition, t);
|
---|
| 879 |
|
---|
| 880 | UpdatePvsEntriesContribution(*ray, true, cf, fPvsSize, bPvsSize, oldPvsSize);
|
---|
[1577] | 881 | #if COUNT_ORIGIN_OBJECTS
|
---|
| 882 | UpdatePvsEntriesContribution(*ray, false, cf, fPvsSize, bPvsSize, oldPvsSize);
|
---|
| 883 | #endif
|
---|
[1576] | 884 | }
|
---|
[1580] | 885 | //cout << "pvs entries: " << fPvsSize << " " << bPvsSize << " " << oldPvsSize << endl;
|
---|
| 886 |
|
---|
[1576] | 887 | return (int)(fPvsSize + bPvsSize - oldPvsSize);
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 |
|
---|
[1237] | 891 | VspInterior *VspTree::SubdivideNode(const AxisAlignedPlane &splitPlane,
|
---|
| 892 | VspTraversalData &tData,
|
---|
| 893 | VspTraversalData &frontData,
|
---|
| 894 | VspTraversalData &backData)
|
---|
| 895 | {
|
---|
| 896 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(tData.mNode);
|
---|
| 897 |
|
---|
[1418] | 898 | ///////////////
|
---|
| 899 | //-- new traversal values
|
---|
[1237] | 900 |
|
---|
| 901 | frontData.mDepth = tData.mDepth + 1;
|
---|
| 902 | backData.mDepth = tData.mDepth + 1;
|
---|
| 903 |
|
---|
| 904 | frontData.mRays = new RayInfoContainer();
|
---|
| 905 | backData.mRays = new RayInfoContainer();
|
---|
| 906 |
|
---|
| 907 | //-- subdivide rays
|
---|
| 908 | SplitRays(splitPlane,
|
---|
| 909 | *tData.mRays,
|
---|
| 910 | *frontData.mRays,
|
---|
| 911 | *backData.mRays);
|
---|
| 912 |
|
---|
| 913 | //-- compute pvs
|
---|
| 914 | frontData.mPvs = EvalPvsSize(*frontData.mRays);
|
---|
| 915 | backData.mPvs = EvalPvsSize(*backData.mRays);
|
---|
[1576] | 916 |
|
---|
[1379] | 917 | //-- split front and back node geometry and compute area
|
---|
[1297] | 918 | tData.mBoundingBox.Split(splitPlane.mAxis,
|
---|
| 919 | splitPlane.mPosition,
|
---|
| 920 | frontData.mBoundingBox,
|
---|
| 921 | backData.mBoundingBox);
|
---|
[1237] | 922 |
|
---|
| 923 | frontData.mProbability = frontData.mBoundingBox.GetVolume();
|
---|
| 924 | backData.mProbability = tData.mProbability - frontData.mProbability;
|
---|
| 925 |
|
---|
[1576] | 926 |
|
---|
| 927 | ////////
|
---|
| 928 | //-- update some stats
|
---|
| 929 |
|
---|
[1237] | 930 | if (tData.mDepth > mVspStats.maxDepth)
|
---|
[1576] | 931 | { //Debug << "max depth increases to " << tData.mDepth << " at " << mVspStats.Leaves() << " leaves" << endl;
|
---|
[1237] | 932 | mVspStats.maxDepth = tData.mDepth;
|
---|
| 933 | }
|
---|
| 934 |
|
---|
[1576] | 935 | // two more leaves per split
|
---|
[1237] | 936 | mVspStats.nodes += 2;
|
---|
[1415] | 937 | /// and a new split
|
---|
| 938 | ++ mVspStats.splits[splitPlane.mAxis];
|
---|
[1237] | 939 |
|
---|
[1570] | 940 |
|
---|
[1576] | 941 | ////////////////
|
---|
[1379] | 942 | //-- create front and back and subdivide further
|
---|
[1237] | 943 |
|
---|
[1379] | 944 | VspInterior *interior = new VspInterior(splitPlane);
|
---|
[1237] | 945 | VspInterior *parent = leaf->GetParent();
|
---|
| 946 |
|
---|
| 947 | // replace a link from node's parent
|
---|
| 948 | if (parent)
|
---|
| 949 | {
|
---|
| 950 | parent->ReplaceChildLink(leaf, interior);
|
---|
| 951 | interior->SetParent(parent);
|
---|
[1570] | 952 | #if WORK_WITH_VIEWCELLS
|
---|
[1237] | 953 | // remove "parent" view cell from pvs of all objects (traverse trough rays)
|
---|
| 954 | RemoveParentViewCellReferences(tData.mNode->GetViewCell());
|
---|
[1570] | 955 | #endif
|
---|
[1237] | 956 | }
|
---|
| 957 | else // new root
|
---|
| 958 | {
|
---|
| 959 | mRoot = interior;
|
---|
| 960 | }
|
---|
| 961 |
|
---|
| 962 | VspLeaf *frontLeaf = new VspLeaf(interior);
|
---|
| 963 | VspLeaf *backLeaf = new VspLeaf(interior);
|
---|
| 964 |
|
---|
| 965 | // and setup child links
|
---|
| 966 | interior->SetupChildLinks(frontLeaf, backLeaf);
|
---|
| 967 |
|
---|
| 968 | // add bounding box
|
---|
| 969 | interior->SetBoundingBox(tData.mBoundingBox);
|
---|
| 970 |
|
---|
| 971 | // set front and back leaf
|
---|
| 972 | frontData.mNode = frontLeaf;
|
---|
| 973 | backData.mNode = backLeaf;
|
---|
| 974 |
|
---|
| 975 | // explicitely create front and back view cell
|
---|
| 976 | CreateViewCell(frontData, false);
|
---|
| 977 | CreateViewCell(backData, false);
|
---|
| 978 |
|
---|
| 979 | #if WORK_WITH_VIEWCELL_PVS
|
---|
| 980 | // create front and back view cell
|
---|
[1570] | 981 | // add front and back view cell to
|
---|
| 982 | // "potentially visible view cells"
|
---|
[1237] | 983 | // of the objects in front and back pvs
|
---|
| 984 |
|
---|
| 985 | AddViewCellReferences(frontLeaf->GetViewCell());
|
---|
| 986 | AddViewCellReferences(backLeaf->GetViewCell());
|
---|
| 987 | #endif
|
---|
| 988 |
|
---|
[1379] | 989 | // set the time stamp so the order of traversal can be reconstructed
|
---|
[1237] | 990 | interior->mTimeStamp = mTimeStamp ++;
|
---|
| 991 |
|
---|
| 992 | return interior;
|
---|
| 993 | }
|
---|
| 994 |
|
---|
| 995 |
|
---|
| 996 |
|
---|
| 997 |
|
---|
| 998 | void VspTree::AddSamplesToPvs(VspLeaf *leaf,
|
---|
| 999 | const RayInfoContainer &rays,
|
---|
| 1000 | float &sampleContributions,
|
---|
| 1001 | int &contributingSamples)
|
---|
| 1002 | {
|
---|
| 1003 | sampleContributions = 0;
|
---|
| 1004 | contributingSamples = 0;
|
---|
| 1005 |
|
---|
| 1006 | RayInfoContainer::const_iterator it, it_end = rays.end();
|
---|
| 1007 |
|
---|
| 1008 | ViewCellLeaf *vc = leaf->GetViewCell();
|
---|
| 1009 |
|
---|
[1577] | 1010 | // add contributions from samples to the pvs
|
---|
[1237] | 1011 | for (it = rays.begin(); it != it_end; ++ it)
|
---|
| 1012 | {
|
---|
| 1013 | float sc = 0.0f;
|
---|
| 1014 | VssRay *ray = (*it).mRay;
|
---|
| 1015 |
|
---|
| 1016 | bool madeContrib = false;
|
---|
| 1017 | float contribution;
|
---|
| 1018 |
|
---|
| 1019 | Intersectable *obj = ray->mTerminationObject;
|
---|
| 1020 |
|
---|
| 1021 | if (obj)
|
---|
| 1022 | {
|
---|
[1259] | 1023 | madeContrib =
|
---|
| 1024 | mViewCellsManager->AddSampleToPvs(
|
---|
| 1025 | obj,
|
---|
| 1026 | ray->mTermination,
|
---|
| 1027 | vc,
|
---|
| 1028 | ray->mPdf,
|
---|
| 1029 | contribution);
|
---|
[1237] | 1030 |
|
---|
| 1031 | sc += contribution;
|
---|
| 1032 | }
|
---|
| 1033 |
|
---|
| 1034 | obj = ray->mOriginObject;
|
---|
| 1035 |
|
---|
| 1036 | if (obj)
|
---|
| 1037 | {
|
---|
[1259] | 1038 | madeContrib =
|
---|
| 1039 | mViewCellsManager->AddSampleToPvs(
|
---|
| 1040 | obj,
|
---|
| 1041 | ray->mOrigin,
|
---|
| 1042 | vc,
|
---|
| 1043 | ray->mPdf,
|
---|
| 1044 | contribution);
|
---|
[1237] | 1045 |
|
---|
| 1046 | sc += contribution;
|
---|
| 1047 | }
|
---|
| 1048 |
|
---|
| 1049 | if (madeContrib)
|
---|
| 1050 | {
|
---|
| 1051 | ++ contributingSamples;
|
---|
| 1052 | }
|
---|
| 1053 |
|
---|
| 1054 | // store rays for visualization
|
---|
| 1055 | if (0) leaf->mVssRays.push_back(new VssRay(*ray));
|
---|
| 1056 | }
|
---|
| 1057 | }
|
---|
| 1058 |
|
---|
| 1059 |
|
---|
| 1060 | void VspTree::SortSubdivisionCandidates(const RayInfoContainer &rays,
|
---|
| 1061 | const int axis,
|
---|
| 1062 | float minBand,
|
---|
| 1063 | float maxBand)
|
---|
| 1064 | {
|
---|
| 1065 | mLocalSubdivisionCandidates->clear();
|
---|
| 1066 |
|
---|
[1314] | 1067 | const int requestedSize = 2 * (int)(rays.size());
|
---|
[1237] | 1068 |
|
---|
| 1069 | // creates a sorted split candidates array
|
---|
| 1070 | if (mLocalSubdivisionCandidates->capacity() > 500000 &&
|
---|
| 1071 | requestedSize < (int)(mLocalSubdivisionCandidates->capacity() / 10) )
|
---|
| 1072 | {
|
---|
| 1073 | delete mLocalSubdivisionCandidates;
|
---|
| 1074 | mLocalSubdivisionCandidates = new vector<SortableEntry>;
|
---|
| 1075 | }
|
---|
| 1076 |
|
---|
| 1077 | mLocalSubdivisionCandidates->reserve(requestedSize);
|
---|
| 1078 |
|
---|
| 1079 | float pos;
|
---|
| 1080 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1081 |
|
---|
[1577] | 1082 | const bool delayMinEvent = false;
|
---|
| 1083 |
|
---|
| 1084 | ////////////
|
---|
[1237] | 1085 | //-- insert all queries
|
---|
| 1086 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
| 1087 | {
|
---|
| 1088 | const bool positive = (*rit).mRay->HasPosDir(axis);
|
---|
[1577] | 1089 |
|
---|
[1314] | 1090 | // origin point
|
---|
[1237] | 1091 | pos = (*rit).ExtrapOrigin(axis);
|
---|
[1314] | 1092 | const int oType = positive ? SortableEntry::ERayMin : SortableEntry::ERayMax;
|
---|
[1237] | 1093 |
|
---|
[1314] | 1094 | if (delayMinEvent && oType == SortableEntry::ERayMin)
|
---|
[1577] | 1095 | pos += mEpsilon; // could be useful feature for walls
|
---|
[1314] | 1096 |
|
---|
| 1097 | mLocalSubdivisionCandidates->push_back(SortableEntry(oType, pos, (*rit).mRay));
|
---|
| 1098 |
|
---|
| 1099 | // termination point
|
---|
[1237] | 1100 | pos = (*rit).ExtrapTermination(axis);
|
---|
[1314] | 1101 | const int tType = positive ? SortableEntry::ERayMax : SortableEntry::ERayMin;
|
---|
[1237] | 1102 |
|
---|
[1314] | 1103 | if (delayMinEvent && tType == SortableEntry::ERayMin)
|
---|
[1577] | 1104 | pos += mEpsilon; // could be useful feature for walls
|
---|
[1314] | 1105 |
|
---|
| 1106 | mLocalSubdivisionCandidates->push_back(SortableEntry(tType, pos, (*rit).mRay));
|
---|
[1237] | 1107 | }
|
---|
| 1108 |
|
---|
| 1109 | stable_sort(mLocalSubdivisionCandidates->begin(), mLocalSubdivisionCandidates->end());
|
---|
| 1110 | }
|
---|
| 1111 |
|
---|
| 1112 |
|
---|
| 1113 | int VspTree::PrepareHeuristics(KdLeaf *leaf)
|
---|
| 1114 | {
|
---|
| 1115 | int pvsSize = 0;
|
---|
| 1116 |
|
---|
| 1117 | if (!leaf->Mailed())
|
---|
| 1118 | {
|
---|
| 1119 | leaf->Mail();
|
---|
| 1120 | leaf->mCounter = 1;
|
---|
| 1121 | // add objects without the objects which are in several kd leaves
|
---|
| 1122 | pvsSize += (int)(leaf->mObjects.size() - leaf->mMultipleObjects.size());
|
---|
| 1123 | }
|
---|
| 1124 | else
|
---|
| 1125 | {
|
---|
| 1126 | ++ leaf->mCounter;
|
---|
| 1127 | }
|
---|
| 1128 |
|
---|
| 1129 | //-- the objects belonging to several leaves must be handled seperately
|
---|
| 1130 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
| 1131 |
|
---|
| 1132 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1133 | {
|
---|
| 1134 | Intersectable *object = *oit;
|
---|
| 1135 |
|
---|
| 1136 | if (!object->Mailed())
|
---|
| 1137 | {
|
---|
| 1138 | object->Mail();
|
---|
| 1139 | object->mCounter = 1;
|
---|
| 1140 |
|
---|
| 1141 | ++ pvsSize;
|
---|
| 1142 | }
|
---|
| 1143 | else
|
---|
| 1144 | {
|
---|
| 1145 | ++ object->mCounter;
|
---|
| 1146 | }
|
---|
| 1147 | }
|
---|
| 1148 |
|
---|
| 1149 | return pvsSize;
|
---|
| 1150 | }
|
---|
| 1151 |
|
---|
| 1152 |
|
---|
| 1153 | int VspTree::PrepareHeuristics(const RayInfoContainer &rays)
|
---|
| 1154 | {
|
---|
| 1155 | Intersectable::NewMail();
|
---|
| 1156 | KdNode::NewMail();
|
---|
[1297] | 1157 | BvhLeaf::NewMail();
|
---|
[1237] | 1158 |
|
---|
| 1159 | int pvsSize = 0;
|
---|
| 1160 |
|
---|
| 1161 | RayInfoContainer::const_iterator ri, ri_end = rays.end();
|
---|
| 1162 |
|
---|
[1259] | 1163 | // set all kd nodes / objects as belonging to the front pvs
|
---|
[1237] | 1164 | for (ri = rays.begin(); ri != ri_end; ++ ri)
|
---|
| 1165 | {
|
---|
| 1166 | VssRay *ray = (*ri).mRay;
|
---|
[1259] | 1167 |
|
---|
| 1168 | pvsSize += PrepareHeuristics(*ray, true);
|
---|
| 1169 | pvsSize += PrepareHeuristics(*ray, false);
|
---|
[1237] | 1170 | }
|
---|
| 1171 |
|
---|
| 1172 | return pvsSize;
|
---|
| 1173 | }
|
---|
| 1174 |
|
---|
| 1175 |
|
---|
[1259] | 1176 | int VspTree::EvalMaxEventContribution(KdLeaf *leaf) const
|
---|
[1237] | 1177 | {
|
---|
[1259] | 1178 | int pvs = 0;
|
---|
| 1179 |
|
---|
[1237] | 1180 | // leaf falls out of right pvs
|
---|
| 1181 | if (-- leaf->mCounter == 0)
|
---|
| 1182 | {
|
---|
| 1183 | pvs -= ((int)leaf->mObjects.size() - (int)leaf->mMultipleObjects.size());
|
---|
| 1184 | }
|
---|
| 1185 |
|
---|
[1259] | 1186 | //-- separately handle objects which are in several kd leaves
|
---|
| 1187 |
|
---|
[1237] | 1188 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
| 1189 |
|
---|
| 1190 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1191 | {
|
---|
| 1192 | Intersectable *object = *oit;
|
---|
| 1193 |
|
---|
| 1194 | if (-- object->mCounter == 0)
|
---|
| 1195 | {
|
---|
[1259] | 1196 | ++ pvs;
|
---|
[1237] | 1197 | }
|
---|
| 1198 | }
|
---|
[1259] | 1199 |
|
---|
| 1200 | return pvs;
|
---|
[1237] | 1201 | }
|
---|
| 1202 |
|
---|
| 1203 |
|
---|
[1259] | 1204 | int VspTree::EvalMinEventContribution(KdLeaf *leaf) const
|
---|
[1237] | 1205 | {
|
---|
| 1206 | if (leaf->Mailed())
|
---|
[1259] | 1207 | return 0;
|
---|
[1237] | 1208 |
|
---|
| 1209 | leaf->Mail();
|
---|
| 1210 |
|
---|
| 1211 | // add objects without those which are part of several kd leaves
|
---|
[1259] | 1212 | int pvs = ((int)leaf->mObjects.size() - (int)leaf->mMultipleObjects.size());
|
---|
[1237] | 1213 |
|
---|
[1259] | 1214 | // separately handle objects which are part of several kd leaves
|
---|
[1237] | 1215 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
| 1216 |
|
---|
| 1217 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1218 | {
|
---|
| 1219 | Intersectable *object = *oit;
|
---|
| 1220 |
|
---|
| 1221 | // object not previously in pvs
|
---|
| 1222 | if (!object->Mailed())
|
---|
| 1223 | {
|
---|
| 1224 | object->Mail();
|
---|
| 1225 | ++ pvs;
|
---|
| 1226 | }
|
---|
[1259] | 1227 | }
|
---|
| 1228 |
|
---|
| 1229 | return pvs;
|
---|
[1237] | 1230 | }
|
---|
| 1231 |
|
---|
| 1232 |
|
---|
[1291] | 1233 | void VspTree::EvalHeuristics(const SortableEntry &ci,
|
---|
| 1234 | int &pvsLeft,
|
---|
| 1235 | int &pvsRight) const
|
---|
[1237] | 1236 | {
|
---|
[1259] | 1237 | VssRay *ray = ci.ray;
|
---|
| 1238 |
|
---|
[1291] | 1239 | // eval changes in pvs causes by min event
|
---|
[1259] | 1240 | if (ci.type == SortableEntry::ERayMin)
|
---|
| 1241 | {
|
---|
| 1242 | pvsLeft += EvalMinEventContribution(*ray, true);
|
---|
| 1243 | pvsLeft += EvalMinEventContribution(*ray, false);
|
---|
| 1244 | }
|
---|
[1291] | 1245 | else // eval changes in pvs causes by max event
|
---|
[1259] | 1246 | {
|
---|
| 1247 | pvsRight -= EvalMaxEventContribution(*ray, true);
|
---|
| 1248 | pvsRight -= EvalMaxEventContribution(*ray, false);
|
---|
| 1249 | }
|
---|
| 1250 | }
|
---|
| 1251 |
|
---|
| 1252 |
|
---|
[1237] | 1253 | float VspTree::EvalLocalCostHeuristics(const VspTraversalData &tData,
|
---|
| 1254 | const AxisAlignedBox3 &box,
|
---|
| 1255 | const int axis,
|
---|
| 1256 | float &position)
|
---|
| 1257 | {
|
---|
[1259] | 1258 | // get subset of rays
|
---|
[1237] | 1259 | RayInfoContainer usedRays;
|
---|
| 1260 |
|
---|
| 1261 | if (mMaxTests < (int)tData.mRays->size())
|
---|
| 1262 | {
|
---|
| 1263 | GetRayInfoSets(*tData.mRays, mMaxTests, usedRays);
|
---|
| 1264 | }
|
---|
| 1265 | else
|
---|
| 1266 | {
|
---|
| 1267 | usedRays = *tData.mRays;
|
---|
| 1268 | }
|
---|
| 1269 |
|
---|
| 1270 | const float minBox = box.Min(axis);
|
---|
| 1271 | const float maxBox = box.Max(axis);
|
---|
| 1272 |
|
---|
| 1273 | const float sizeBox = maxBox - minBox;
|
---|
| 1274 |
|
---|
| 1275 | const float minBand = minBox + mMinBand * sizeBox;
|
---|
| 1276 | const float maxBand = minBox + mMaxBand * sizeBox;
|
---|
| 1277 |
|
---|
| 1278 | SortSubdivisionCandidates(usedRays, axis, minBand, maxBand);
|
---|
| 1279 |
|
---|
| 1280 | // prepare the sweep
|
---|
[1291] | 1281 | // note: returns pvs size => no need t give pvs size as function parameter
|
---|
| 1282 | const int pvsSize = PrepareHeuristics(usedRays);
|
---|
[1237] | 1283 |
|
---|
| 1284 | // go through the lists, count the number of objects left and right
|
---|
| 1285 | // and evaluate the following cost funcion:
|
---|
| 1286 | // C = ct_div_ci + (ql*rl + qr*rr)/queries
|
---|
| 1287 |
|
---|
| 1288 | int pvsl = 0;
|
---|
| 1289 | int pvsr = pvsSize;
|
---|
| 1290 |
|
---|
| 1291 | int pvsBack = pvsl;
|
---|
| 1292 | int pvsFront = pvsr;
|
---|
| 1293 |
|
---|
| 1294 | float sum = (float)pvsSize * sizeBox;
|
---|
| 1295 | float minSum = 1e20f;
|
---|
| 1296 |
|
---|
| 1297 | // if no good split can be found, take mid split
|
---|
| 1298 | position = minBox + 0.5f * sizeBox;
|
---|
| 1299 |
|
---|
| 1300 | // the relative cost ratio
|
---|
| 1301 | float ratio = 99999999.0f;
|
---|
| 1302 | bool splitPlaneFound = false;
|
---|
| 1303 |
|
---|
| 1304 | Intersectable::NewMail();
|
---|
| 1305 | KdLeaf::NewMail();
|
---|
[1291] | 1306 | BvhLeaf::NewMail();
|
---|
[1237] | 1307 |
|
---|
| 1308 | //-- traverse through visibility events
|
---|
| 1309 | vector<SortableEntry>::const_iterator ci, ci_end = mLocalSubdivisionCandidates->end();
|
---|
| 1310 |
|
---|
[1314] | 1311 | #ifdef _DEBUG
|
---|
| 1312 | const float volRatio = tData.mBoundingBox.GetVolume() / (sizeBox * mBoundingBox.GetVolume());
|
---|
| 1313 | const int leaves = mVspStats.Leaves();
|
---|
| 1314 | const bool printStats = ((axis == 0) && (leaves > 0) && (leaves < 90));
|
---|
| 1315 |
|
---|
| 1316 | ofstream sumStats;
|
---|
| 1317 | ofstream pvslStats;
|
---|
| 1318 | ofstream pvsrStats;
|
---|
| 1319 |
|
---|
| 1320 | if (printStats)
|
---|
| 1321 | {
|
---|
| 1322 | char str[64];
|
---|
| 1323 |
|
---|
| 1324 | sprintf(str, "tmp/vsp_heur_sum-%04d.log", leaves);
|
---|
| 1325 | sumStats.open(str);
|
---|
| 1326 | sprintf(str, "tmp/vsp_heur_pvsl-%04d.log", leaves);
|
---|
| 1327 | pvslStats.open(str);
|
---|
| 1328 | sprintf(str, "tmp/vsp_heur_pvsr-%04d.log", leaves);
|
---|
| 1329 | pvsrStats.open(str);
|
---|
| 1330 | }
|
---|
| 1331 |
|
---|
| 1332 | #endif
|
---|
[1237] | 1333 | for (ci = mLocalSubdivisionCandidates->begin(); ci != ci_end; ++ ci)
|
---|
| 1334 | {
|
---|
[1291] | 1335 | // compute changes to front and back pvs
|
---|
| 1336 | EvalHeuristics(*ci, pvsl, pvsr);
|
---|
[1237] | 1337 |
|
---|
| 1338 | // Note: sufficient to compare size of bounding boxes of front and back side?
|
---|
| 1339 | if (((*ci).value >= minBand) && ((*ci).value <= maxBand))
|
---|
| 1340 | {
|
---|
| 1341 | float currentPos;
|
---|
| 1342 |
|
---|
| 1343 | // HACK: current positition is BETWEEN visibility events
|
---|
| 1344 | if (0 && ((ci + 1) != ci_end))
|
---|
| 1345 | currentPos = ((*ci).value + (*(ci + 1)).value) * 0.5f;
|
---|
| 1346 | else
|
---|
| 1347 | currentPos = (*ci).value;
|
---|
| 1348 |
|
---|
| 1349 | sum = pvsl * ((*ci).value - minBox) + pvsr * (maxBox - (*ci).value);
|
---|
[1291] | 1350 |
|
---|
[1314] | 1351 | #ifdef _DEBUG
|
---|
| 1352 | if (printStats)
|
---|
| 1353 | {
|
---|
| 1354 | sumStats
|
---|
| 1355 | << "#Position\n" << currentPos << endl
|
---|
| 1356 | << "#Sum\n" << sum * volRatio << endl
|
---|
| 1357 | << "#Pvs\n" << pvsl + pvsr << endl;
|
---|
[1237] | 1358 |
|
---|
[1314] | 1359 | pvslStats
|
---|
| 1360 | << "#Position\n" << currentPos << endl
|
---|
| 1361 | << "#Pvsl\n" << pvsl << endl;
|
---|
| 1362 |
|
---|
| 1363 | pvsrStats
|
---|
| 1364 | << "#Position\n" << currentPos << endl
|
---|
| 1365 | << "#Pvsr\n" << pvsr << endl;
|
---|
| 1366 | }
|
---|
| 1367 | #endif
|
---|
| 1368 |
|
---|
[1237] | 1369 | if (sum < minSum)
|
---|
| 1370 | {
|
---|
| 1371 | splitPlaneFound = true;
|
---|
| 1372 |
|
---|
| 1373 | minSum = sum;
|
---|
| 1374 | position = currentPos;
|
---|
| 1375 |
|
---|
| 1376 | pvsBack = pvsl;
|
---|
| 1377 | pvsFront = pvsr;
|
---|
| 1378 | }
|
---|
| 1379 | }
|
---|
| 1380 | }
|
---|
| 1381 |
|
---|
[1421] | 1382 | /////////
|
---|
[1237] | 1383 | //-- compute cost
|
---|
| 1384 |
|
---|
| 1385 | const int lowerPvsLimit = mViewCellsManager->GetMinPvsSize();
|
---|
| 1386 | const int upperPvsLimit = mViewCellsManager->GetMaxPvsSize();
|
---|
| 1387 |
|
---|
| 1388 | const float pOverall = sizeBox;
|
---|
| 1389 | const float pBack = position - minBox;
|
---|
| 1390 | const float pFront = maxBox - position;
|
---|
| 1391 |
|
---|
| 1392 | const float penaltyOld = EvalPvsPenalty(pvsSize, lowerPvsLimit, upperPvsLimit);
|
---|
| 1393 | const float penaltyFront = EvalPvsPenalty(pvsFront, lowerPvsLimit, upperPvsLimit);
|
---|
| 1394 | const float penaltyBack = EvalPvsPenalty(pvsBack, lowerPvsLimit, upperPvsLimit);
|
---|
| 1395 |
|
---|
| 1396 | const float oldRenderCost = penaltyOld * pOverall + Limits::Small;
|
---|
| 1397 | const float newRenderCost = penaltyFront * pFront + penaltyBack * pBack;
|
---|
| 1398 |
|
---|
| 1399 | if (splitPlaneFound)
|
---|
| 1400 | {
|
---|
| 1401 | ratio = newRenderCost / oldRenderCost;
|
---|
| 1402 | }
|
---|
| 1403 |
|
---|
[1314] | 1404 | #ifdef _DEBUG
|
---|
[1291] | 1405 | Debug << "\n§§§§ eval local cost §§§§" << endl
|
---|
[1237] | 1406 | << "back pvs: " << penaltyBack << " front pvs: " << penaltyFront << " total pvs: " << penaltyOld << endl
|
---|
| 1407 | << "back p: " << pBack * volRatio << " front p " << pFront * volRatio << " p: " << pOverall * volRatio << endl
|
---|
| 1408 | << "old rc: " << oldRenderCost * volRatio << " new rc: " << newRenderCost * volRatio << endl
|
---|
| 1409 | << "render cost decrease: " << oldRenderCost * volRatio - newRenderCost * volRatio << endl;
|
---|
[1314] | 1410 | #endif
|
---|
[1237] | 1411 | return ratio;
|
---|
| 1412 | }
|
---|
| 1413 |
|
---|
| 1414 |
|
---|
| 1415 | float VspTree::SelectSplitPlane(const VspTraversalData &tData,
|
---|
| 1416 | AxisAlignedPlane &plane,
|
---|
| 1417 | float &pFront,
|
---|
| 1418 | float &pBack)
|
---|
| 1419 | {
|
---|
| 1420 | float nPosition[3];
|
---|
| 1421 | float nCostRatio[3];
|
---|
| 1422 | float nProbFront[3];
|
---|
| 1423 | float nProbBack[3];
|
---|
| 1424 |
|
---|
| 1425 | // create bounding box of node geometry
|
---|
| 1426 | AxisAlignedBox3 box = tData.mBoundingBox;
|
---|
| 1427 |
|
---|
| 1428 | int sAxis = 0;
|
---|
| 1429 | int bestAxis = -1;
|
---|
| 1430 |
|
---|
[1370] | 1431 | // do we use some kind of specialised "fixed" axis?
|
---|
[1237] | 1432 | const bool useSpecialAxis =
|
---|
| 1433 | mOnlyDrivingAxis || mCirculatingAxis;
|
---|
[1291] | 1434 |
|
---|
[1237] | 1435 | if (mCirculatingAxis)
|
---|
| 1436 | {
|
---|
| 1437 | int parentAxis = 0;
|
---|
| 1438 | VspNode *parent = tData.mNode->GetParent();
|
---|
| 1439 |
|
---|
| 1440 | if (parent)
|
---|
| 1441 | parentAxis = dynamic_cast<VspInterior *>(parent)->GetAxis();
|
---|
| 1442 |
|
---|
| 1443 | sAxis = (parentAxis + 1) % 3;
|
---|
| 1444 | }
|
---|
| 1445 | else if (mOnlyDrivingAxis)
|
---|
| 1446 | {
|
---|
| 1447 | sAxis = box.Size().DrivingAxis();
|
---|
| 1448 | }
|
---|
| 1449 |
|
---|
| 1450 | for (int axis = 0; axis < 3; ++ axis)
|
---|
| 1451 | {
|
---|
| 1452 | if (!useSpecialAxis || (axis == sAxis))
|
---|
| 1453 | {
|
---|
| 1454 | if (mUseCostHeuristics)
|
---|
| 1455 | {
|
---|
| 1456 | //-- place split plane using heuristics
|
---|
| 1457 | nCostRatio[axis] =
|
---|
| 1458 | EvalLocalCostHeuristics(tData,
|
---|
| 1459 | box,
|
---|
| 1460 | axis,
|
---|
| 1461 | nPosition[axis]);
|
---|
| 1462 | }
|
---|
| 1463 | else
|
---|
| 1464 | {
|
---|
[1370] | 1465 | //-- split plane position is spatial median
|
---|
[1237] | 1466 | nPosition[axis] = (box.Min()[axis] + box.Max()[axis]) * 0.5f;
|
---|
| 1467 | nCostRatio[axis] = EvalLocalSplitCost(tData,
|
---|
| 1468 | box,
|
---|
| 1469 | axis,
|
---|
| 1470 | nPosition[axis],
|
---|
| 1471 | nProbFront[axis],
|
---|
| 1472 | nProbBack[axis]);
|
---|
| 1473 | }
|
---|
| 1474 |
|
---|
| 1475 | if (bestAxis == -1)
|
---|
| 1476 | {
|
---|
| 1477 | bestAxis = axis;
|
---|
| 1478 | }
|
---|
| 1479 | else if (nCostRatio[axis] < nCostRatio[bestAxis])
|
---|
| 1480 | {
|
---|
| 1481 | bestAxis = axis;
|
---|
| 1482 | }
|
---|
| 1483 | }
|
---|
| 1484 | }
|
---|
| 1485 |
|
---|
[1370] | 1486 | ////////////////////////////////
|
---|
[1237] | 1487 | //-- assign values of best split
|
---|
[1370] | 1488 |
|
---|
[1237] | 1489 | plane.mAxis = bestAxis;
|
---|
[1370] | 1490 | // best split plane position
|
---|
| 1491 | plane.mPosition = nPosition[bestAxis];
|
---|
[1237] | 1492 |
|
---|
| 1493 | pFront = nProbFront[bestAxis];
|
---|
| 1494 | pBack = nProbBack[bestAxis];
|
---|
| 1495 |
|
---|
| 1496 | return nCostRatio[bestAxis];
|
---|
| 1497 | }
|
---|
| 1498 |
|
---|
| 1499 |
|
---|
| 1500 | float VspTree::EvalRenderCostDecrease(const AxisAlignedPlane &candidatePlane,
|
---|
| 1501 | const VspTraversalData &data,
|
---|
| 1502 | float &normalizedOldRenderCost) const
|
---|
| 1503 | {
|
---|
| 1504 | float pvsFront = 0;
|
---|
| 1505 | float pvsBack = 0;
|
---|
| 1506 | float totalPvs = 0;
|
---|
| 1507 |
|
---|
| 1508 | const float viewSpaceVol = mBoundingBox.GetVolume();
|
---|
| 1509 |
|
---|
[1379] | 1510 | //////////////////////////////////////////////
|
---|
| 1511 | // mark objects in the front / back / both using mailboxing
|
---|
| 1512 | // then count pvs sizes
|
---|
[1576] | 1513 |
|
---|
[1237] | 1514 | Intersectable::NewMail(3);
|
---|
| 1515 | KdLeaf::NewMail(3);
|
---|
[1291] | 1516 | BvhLeaf::NewMail(3);
|
---|
[1237] | 1517 |
|
---|
| 1518 | RayInfoContainer::const_iterator rit, rit_end = data.mRays->end();
|
---|
| 1519 |
|
---|
| 1520 | for (rit = data.mRays->begin(); rit != rit_end; ++ rit)
|
---|
| 1521 | {
|
---|
| 1522 | RayInfo rayInf = *rit;
|
---|
| 1523 |
|
---|
| 1524 | float t;
|
---|
| 1525 | VssRay *ray = rayInf.mRay;
|
---|
| 1526 |
|
---|
[1291] | 1527 | // classify ray
|
---|
[1237] | 1528 | const int cf =
|
---|
| 1529 | rayInf.ComputeRayIntersection(candidatePlane.mAxis,
|
---|
| 1530 | candidatePlane.mPosition, t);
|
---|
[1289] | 1531 |
|
---|
[1580] | 1532 | // evaluate contribution of ray endpoint to front
|
---|
| 1533 | // and back pvs with respect to the classification
|
---|
[1297] | 1534 | UpdateContributionsToPvs(*ray, true, cf, pvsFront, pvsBack, totalPvs);
|
---|
[1577] | 1535 | #if COUNT_ORIGIN_OBJECTS
|
---|
[1291] | 1536 | UpdateContributionsToPvs(*ray, false, cf, pvsFront, pvsBack, totalPvs);
|
---|
[1577] | 1537 | #endif
|
---|
[1289] | 1538 | }
|
---|
| 1539 |
|
---|
[1237] | 1540 | AxisAlignedBox3 frontBox;
|
---|
| 1541 | AxisAlignedBox3 backBox;
|
---|
| 1542 |
|
---|
| 1543 | data.mBoundingBox.Split(candidatePlane.mAxis, candidatePlane.mPosition, frontBox, backBox);
|
---|
| 1544 |
|
---|
[1297] | 1545 | // probability that view point lies in back / front node
|
---|
| 1546 | float pOverall = data.mProbability;
|
---|
| 1547 | float pFront = pFront = frontBox.GetVolume();
|
---|
| 1548 | float pBack = pOverall - pFront;
|
---|
[1237] | 1549 |
|
---|
[1297] | 1550 |
|
---|
[1379] | 1551 | ////////////////////////////////////
|
---|
| 1552 | //-- evaluate render cost heuristics
|
---|
[1302] | 1553 |
|
---|
[1237] | 1554 | const int lowerPvsLimit = mViewCellsManager->GetMinPvsSize();
|
---|
| 1555 | const int upperPvsLimit = mViewCellsManager->GetMaxPvsSize();
|
---|
| 1556 |
|
---|
[1379] | 1557 | const float penaltyOld = EvalPvsPenalty((int)totalPvs, lowerPvsLimit, upperPvsLimit);
|
---|
[1237] | 1558 | const float penaltyFront = EvalPvsPenalty((int)pvsFront, lowerPvsLimit, upperPvsLimit);
|
---|
| 1559 | const float penaltyBack = EvalPvsPenalty((int)pvsBack, lowerPvsLimit, upperPvsLimit);
|
---|
| 1560 |
|
---|
| 1561 | const float oldRenderCost = pOverall * penaltyOld;
|
---|
| 1562 | const float newRenderCost = penaltyFront * pFront + penaltyBack * pBack;
|
---|
| 1563 |
|
---|
[1379] | 1564 | // we also return the old render cost
|
---|
[1237] | 1565 | normalizedOldRenderCost = oldRenderCost / viewSpaceVol;
|
---|
| 1566 |
|
---|
[1379] | 1567 | // the render cost decrase for this split
|
---|
[1237] | 1568 | const float renderCostDecrease = (oldRenderCost - newRenderCost) / viewSpaceVol;
|
---|
[1421] | 1569 |
|
---|
[1522] | 1570 | #ifdef _DEBUG
|
---|
[1421] | 1571 | Debug << "\nvsp render cost decrease" << endl
|
---|
[1237] | 1572 | << "back pvs: " << pvsBack << " front pvs " << pvsFront << " total pvs: " << totalPvs << endl
|
---|
| 1573 | << "back p: " << pBack / viewSpaceVol << " front p " << pFront / viewSpaceVol << " p: " << pOverall / viewSpaceVol << endl
|
---|
| 1574 | << "old rc: " << normalizedOldRenderCost << " new rc: " << newRenderCost / viewSpaceVol << endl
|
---|
| 1575 | << "render cost decrease: " << renderCostDecrease << endl;
|
---|
[1522] | 1576 | #endif
|
---|
[1576] | 1577 |
|
---|
[1237] | 1578 | return renderCostDecrease;
|
---|
| 1579 | }
|
---|
| 1580 |
|
---|
| 1581 |
|
---|
[1291] | 1582 |
|
---|
[1237] | 1583 | float VspTree::EvalLocalSplitCost(const VspTraversalData &data,
|
---|
| 1584 | const AxisAlignedBox3 &box,
|
---|
| 1585 | const int axis,
|
---|
| 1586 | const float &position,
|
---|
| 1587 | float &pFront,
|
---|
| 1588 | float &pBack) const
|
---|
| 1589 | {
|
---|
| 1590 | float pvsTotal = 0;
|
---|
| 1591 | float pvsFront = 0;
|
---|
| 1592 | float pvsBack = 0;
|
---|
| 1593 |
|
---|
| 1594 | // create unique ids for pvs heuristics
|
---|
| 1595 | Intersectable::NewMail(3);
|
---|
[1297] | 1596 | BvhLeaf::NewMail(3);
|
---|
| 1597 | KdLeaf::NewMail(3);
|
---|
[1237] | 1598 |
|
---|
| 1599 | const int pvsSize = data.mPvs;
|
---|
| 1600 | RayInfoContainer::const_iterator rit, rit_end = data.mRays->end();
|
---|
| 1601 |
|
---|
| 1602 | // this is the main ray classification loop!
|
---|
| 1603 | for(rit = data.mRays->begin(); rit != rit_end; ++ rit)
|
---|
| 1604 | {
|
---|
[1291] | 1605 | VssRay *ray = (*rit).mRay;
|
---|
| 1606 |
|
---|
[1237] | 1607 | // determine the side of this ray with respect to the plane
|
---|
| 1608 | float t;
|
---|
| 1609 | const int side = (*rit).ComputeRayIntersection(axis, position, t);
|
---|
| 1610 |
|
---|
[1291] | 1611 | UpdateContributionsToPvs(*ray, true, side, pvsFront, pvsBack, pvsTotal);
|
---|
| 1612 | UpdateContributionsToPvs(*ray, false, side, pvsFront, pvsBack, pvsTotal);
|
---|
[1237] | 1613 | }
|
---|
| 1614 |
|
---|
[1576] | 1615 | //////////////
|
---|
[1237] | 1616 | //-- evaluate cost heuristics
|
---|
[1291] | 1617 | float pOverall = data.mProbability;
|
---|
[1237] | 1618 |
|
---|
| 1619 | // we use spatial mid split => simplified computation
|
---|
| 1620 | pBack = pFront = pOverall * 0.5f;
|
---|
| 1621 |
|
---|
| 1622 | const float newCost = pvsBack * pBack + pvsFront * pFront;
|
---|
| 1623 | const float oldCost = (float)pvsSize * pOverall + Limits::Small;
|
---|
| 1624 |
|
---|
| 1625 | #ifdef _DEBUG
|
---|
[1302] | 1626 | Debug << "axis: " << axis << " " << pvsSize << " " << pvsBack << " " << pvsFront << endl;
|
---|
| 1627 | Debug << "p: " << pFront << " " << pBack << " " << pOverall << endl;
|
---|
[1237] | 1628 | #endif
|
---|
| 1629 |
|
---|
| 1630 | return (mCtDivCi + newCost) / oldCost;
|
---|
| 1631 | }
|
---|
| 1632 |
|
---|
| 1633 |
|
---|
[1577] | 1634 | void VspTree::UpdateContributionsToPvs(Intersectable *obj,
|
---|
| 1635 | const int cf,
|
---|
| 1636 | float &frontPvs,
|
---|
| 1637 | float &backPvs,
|
---|
| 1638 | float &totalPvs) const
|
---|
| 1639 | {
|
---|
| 1640 | if (!obj) return;
|
---|
| 1641 |
|
---|
| 1642 | //const float renderCost = mViewCellsManager->SimpleRay &raynderCost(obj);
|
---|
| 1643 | const int renderCost = 1;
|
---|
| 1644 |
|
---|
| 1645 | // object in no pvs => new
|
---|
| 1646 | if (!obj->Mailed() && !obj->Mailed(1) && !obj->Mailed(2))
|
---|
| 1647 | {
|
---|
| 1648 | totalPvs += renderCost;
|
---|
| 1649 | }
|
---|
| 1650 |
|
---|
| 1651 | // QUESTION matt: is it safe to assume that
|
---|
| 1652 | // the object belongs to no pvs in this case?
|
---|
| 1653 | //if (cf == Ray::COINCIDENT) return;
|
---|
| 1654 |
|
---|
| 1655 | if (cf >= 0) // front pvs
|
---|
| 1656 | {
|
---|
| 1657 | if (!obj->Mailed() && !obj->Mailed(2))
|
---|
| 1658 | {
|
---|
| 1659 | frontPvs += renderCost;
|
---|
| 1660 |
|
---|
| 1661 | // already in back pvs => in both pvss
|
---|
| 1662 | if (obj->Mailed(1))
|
---|
| 1663 | obj->Mail(2);
|
---|
| 1664 | else
|
---|
| 1665 | obj->Mail();
|
---|
| 1666 | }
|
---|
| 1667 | }
|
---|
| 1668 |
|
---|
| 1669 | if (cf <= 0) // back pvs
|
---|
| 1670 | {
|
---|
| 1671 | if (!obj->Mailed(1) && !obj->Mailed(2))
|
---|
| 1672 | {
|
---|
| 1673 | backPvs += renderCost;
|
---|
| 1674 |
|
---|
| 1675 | // already in front pvs => in both pvss
|
---|
| 1676 | if (obj->Mailed())
|
---|
| 1677 | obj->Mail(2);
|
---|
| 1678 | else
|
---|
| 1679 | obj->Mail(1);
|
---|
| 1680 | }
|
---|
| 1681 | }
|
---|
| 1682 | }
|
---|
| 1683 |
|
---|
| 1684 |
|
---|
[1291] | 1685 | void VspTree::UpdateContributionsToPvs(BvhLeaf *leaf,
|
---|
| 1686 | const int cf,
|
---|
| 1687 | float &frontPvs,
|
---|
| 1688 | float &backPvs,
|
---|
[1576] | 1689 | float &totalPvs,
|
---|
| 1690 | const bool countEntries) const
|
---|
[1289] | 1691 | {
|
---|
| 1692 | if (!leaf) return;
|
---|
[1576] | 1693 | const int renderCost = countEntries ? 1 : (int)leaf->mObjects.size();
|
---|
[1580] | 1694 |
|
---|
[1289] | 1695 | // leaf in no pvs => new
|
---|
| 1696 | if (!leaf->Mailed() && !leaf->Mailed(1) && !leaf->Mailed(2))
|
---|
| 1697 | {
|
---|
| 1698 | totalPvs += renderCost;
|
---|
| 1699 | }
|
---|
| 1700 |
|
---|
| 1701 | if (cf >= 0) // front pvs
|
---|
| 1702 | {
|
---|
| 1703 | if (!leaf->Mailed() && !leaf->Mailed(2))
|
---|
| 1704 | {
|
---|
| 1705 | frontPvs += renderCost;
|
---|
[1297] | 1706 |
|
---|
[1289] | 1707 | // already in back pvs => in both pvss
|
---|
| 1708 | if (leaf->Mailed(1))
|
---|
| 1709 | leaf->Mail(2);
|
---|
| 1710 | else
|
---|
| 1711 | leaf->Mail();
|
---|
| 1712 | }
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
| 1715 | if (cf <= 0) // back pvs
|
---|
| 1716 | {
|
---|
[1290] | 1717 | if (!leaf->Mailed(1) && !leaf->Mailed(2))
|
---|
[1289] | 1718 | {
|
---|
| 1719 | backPvs += renderCost;
|
---|
| 1720 |
|
---|
| 1721 | // already in front pvs => in both pvss
|
---|
| 1722 | if (leaf->Mailed())
|
---|
[1297] | 1723 | {
|
---|
[1289] | 1724 | leaf->Mail(2);
|
---|
[1297] | 1725 | }
|
---|
[1289] | 1726 | else
|
---|
| 1727 | leaf->Mail(1);
|
---|
| 1728 | }
|
---|
[1291] | 1729 | }
|
---|
[1289] | 1730 | }
|
---|
| 1731 |
|
---|
| 1732 |
|
---|
| 1733 |
|
---|
[1291] | 1734 | void VspTree::UpdateContributionsToPvs(KdLeaf *leaf,
|
---|
| 1735 | const int cf,
|
---|
| 1736 | float &frontPvs,
|
---|
| 1737 | float &backPvs,
|
---|
| 1738 | float &totalPvs) const
|
---|
[1237] | 1739 | {
|
---|
| 1740 | if (!leaf) return;
|
---|
| 1741 |
|
---|
| 1742 | // the objects which are referenced in this and only this leaf
|
---|
| 1743 | const int contri = (int)(leaf->mObjects.size() - leaf->mMultipleObjects.size());
|
---|
| 1744 |
|
---|
| 1745 | // newly found leaf
|
---|
| 1746 | if (!leaf->Mailed() && !leaf->Mailed(1) && !leaf->Mailed(2))
|
---|
| 1747 | {
|
---|
| 1748 | totalPvs += contri;
|
---|
| 1749 | }
|
---|
| 1750 |
|
---|
[1291] | 1751 | // recursivly update contributions of yet unclassified objects
|
---|
[1237] | 1752 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
| 1753 |
|
---|
| 1754 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1755 | {
|
---|
[1291] | 1756 | UpdateContributionsToPvs(*oit, cf, frontPvs, backPvs, totalPvs);
|
---|
[1237] | 1757 | }
|
---|
| 1758 |
|
---|
| 1759 | if (cf >= 0) // front pvs
|
---|
| 1760 | {
|
---|
| 1761 | if (!leaf->Mailed() && !leaf->Mailed(2))
|
---|
| 1762 | {
|
---|
| 1763 | frontPvs += contri;
|
---|
| 1764 |
|
---|
| 1765 | // already in back pvs => in both pvss
|
---|
| 1766 | if (leaf->Mailed(1))
|
---|
| 1767 | leaf->Mail(2);
|
---|
| 1768 | else
|
---|
| 1769 | leaf->Mail();
|
---|
| 1770 | }
|
---|
| 1771 | }
|
---|
| 1772 |
|
---|
| 1773 | if (cf <= 0) // back pvs
|
---|
| 1774 | {
|
---|
| 1775 | if (!leaf->Mailed(1) && !leaf->Mailed(2))
|
---|
| 1776 | {
|
---|
| 1777 | backPvs += contri;
|
---|
| 1778 |
|
---|
| 1779 | // already in front pvs => in both pvss
|
---|
| 1780 | if (leaf->Mailed())
|
---|
| 1781 | leaf->Mail(2);
|
---|
| 1782 | else
|
---|
| 1783 | leaf->Mail(1);
|
---|
| 1784 | }
|
---|
| 1785 | }
|
---|
| 1786 | }
|
---|
| 1787 |
|
---|
| 1788 |
|
---|
| 1789 | void VspTree::CollectLeaves(vector<VspLeaf *> &leaves,
|
---|
| 1790 | const bool onlyUnmailed,
|
---|
| 1791 | const int maxPvsSize) const
|
---|
| 1792 | {
|
---|
| 1793 | stack<VspNode *> nodeStack;
|
---|
| 1794 | nodeStack.push(mRoot);
|
---|
| 1795 |
|
---|
| 1796 | while (!nodeStack.empty())
|
---|
| 1797 | {
|
---|
| 1798 | VspNode *node = nodeStack.top();
|
---|
| 1799 | nodeStack.pop();
|
---|
| 1800 |
|
---|
| 1801 | if (node->IsLeaf())
|
---|
| 1802 | {
|
---|
| 1803 | // test if this leaf is in valid view space
|
---|
| 1804 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
| 1805 | if (leaf->TreeValid() &&
|
---|
| 1806 | (!onlyUnmailed || !leaf->Mailed()) &&
|
---|
| 1807 | ((maxPvsSize < 0) || (leaf->GetViewCell()->GetPvs().CountObjectsInPvs() <= maxPvsSize)))
|
---|
| 1808 | {
|
---|
| 1809 | leaves.push_back(leaf);
|
---|
| 1810 | }
|
---|
| 1811 | }
|
---|
| 1812 | else
|
---|
| 1813 | {
|
---|
| 1814 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 1815 |
|
---|
| 1816 | nodeStack.push(interior->GetBack());
|
---|
| 1817 | nodeStack.push(interior->GetFront());
|
---|
| 1818 | }
|
---|
| 1819 | }
|
---|
| 1820 | }
|
---|
| 1821 |
|
---|
| 1822 |
|
---|
| 1823 | AxisAlignedBox3 VspTree::GetBoundingBox() const
|
---|
| 1824 | {
|
---|
| 1825 | return mBoundingBox;
|
---|
| 1826 | }
|
---|
| 1827 |
|
---|
| 1828 |
|
---|
| 1829 | VspNode *VspTree::GetRoot() const
|
---|
| 1830 | {
|
---|
| 1831 | return mRoot;
|
---|
| 1832 | }
|
---|
| 1833 |
|
---|
| 1834 |
|
---|
| 1835 | void VspTree::EvaluateLeafStats(const VspTraversalData &data)
|
---|
| 1836 | {
|
---|
| 1837 | // the node became a leaf -> evaluate stats for leafs
|
---|
| 1838 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(data.mNode);
|
---|
| 1839 |
|
---|
| 1840 |
|
---|
| 1841 | if (data.mPvs > mVspStats.maxPvs)
|
---|
| 1842 | {
|
---|
| 1843 | mVspStats.maxPvs = data.mPvs;
|
---|
| 1844 | }
|
---|
| 1845 |
|
---|
| 1846 | mVspStats.pvs += data.mPvs;
|
---|
| 1847 |
|
---|
| 1848 | if (data.mDepth < mVspStats.minDepth)
|
---|
| 1849 | {
|
---|
| 1850 | mVspStats.minDepth = data.mDepth;
|
---|
| 1851 | }
|
---|
| 1852 |
|
---|
| 1853 | if (data.mDepth >= mTermMaxDepth)
|
---|
| 1854 | {
|
---|
| 1855 | ++ mVspStats.maxDepthNodes;
|
---|
| 1856 | //Debug << "new max depth: " << mVspStats.maxDepthNodes << endl;
|
---|
| 1857 | }
|
---|
| 1858 |
|
---|
| 1859 | // accumulate rays to compute rays / leaf
|
---|
[1640] | 1860 | mVspStats.rayRefs += (int)data.mRays->size();
|
---|
[1237] | 1861 |
|
---|
| 1862 | if (data.mPvs < mTermMinPvs)
|
---|
| 1863 | ++ mVspStats.minPvsNodes;
|
---|
| 1864 |
|
---|
| 1865 | if ((int)data.mRays->size() < mTermMinRays)
|
---|
| 1866 | ++ mVspStats.minRaysNodes;
|
---|
| 1867 |
|
---|
| 1868 | if (data.GetAvgRayContribution() > mTermMaxRayContribution)
|
---|
| 1869 | ++ mVspStats.maxRayContribNodes;
|
---|
| 1870 |
|
---|
| 1871 | if (data.mProbability <= mTermMinProbability)
|
---|
| 1872 | ++ mVspStats.minProbabilityNodes;
|
---|
| 1873 |
|
---|
| 1874 | // accumulate depth to compute average depth
|
---|
| 1875 | mVspStats.accumDepth += data.mDepth;
|
---|
| 1876 |
|
---|
| 1877 | ++ mCreatedViewCells;
|
---|
| 1878 |
|
---|
| 1879 | #ifdef _DEBUG
|
---|
| 1880 | Debug << "BSP stats: "
|
---|
| 1881 | << "Depth: " << data.mDepth << " (max: " << mTermMaxDepth << "), "
|
---|
| 1882 | << "PVS: " << data.mPvs << " (min: " << mTermMinPvs << "), "
|
---|
| 1883 | << "#rays: " << (int)data.mRays->size() << " (max: " << mTermMinRays << "), "
|
---|
| 1884 | << "#pvs: " << leaf->GetViewCell()->GetPvs().CountObjectsInPvs() << "), "
|
---|
| 1885 | << "#avg ray contrib (pvs): " << (float)data.mPvs / (float)data.mRays->size() << endl;
|
---|
| 1886 | #endif
|
---|
| 1887 | }
|
---|
| 1888 |
|
---|
| 1889 |
|
---|
| 1890 | void VspTree::CollectViewCells(ViewCellContainer &viewCells, bool onlyValid) const
|
---|
| 1891 | {
|
---|
| 1892 | ViewCell::NewMail();
|
---|
| 1893 | CollectViewCells(mRoot, onlyValid, viewCells, true);
|
---|
| 1894 | }
|
---|
| 1895 |
|
---|
| 1896 |
|
---|
| 1897 | void VspTree::CollapseViewCells()
|
---|
| 1898 | {
|
---|
| 1899 | // TODO matt
|
---|
| 1900 | #if HAS_TO_BE_REDONE
|
---|
| 1901 | stack<VspNode *> nodeStack;
|
---|
| 1902 |
|
---|
| 1903 | if (!mRoot)
|
---|
| 1904 | return;
|
---|
| 1905 |
|
---|
| 1906 | nodeStack.push(mRoot);
|
---|
| 1907 |
|
---|
| 1908 | while (!nodeStack.empty())
|
---|
| 1909 | {
|
---|
| 1910 | VspNode *node = nodeStack.top();
|
---|
| 1911 | nodeStack.pop();
|
---|
| 1912 |
|
---|
| 1913 | if (node->IsLeaf())
|
---|
| 1914 | {
|
---|
| 1915 | BspViewCell *viewCell = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
| 1916 |
|
---|
| 1917 | if (!viewCell->GetValid())
|
---|
| 1918 | {
|
---|
| 1919 | BspViewCell *viewCell = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
| 1920 |
|
---|
| 1921 | ViewCellContainer leaves;
|
---|
| 1922 | mViewCellsTree->CollectLeaves(viewCell, leaves);
|
---|
| 1923 |
|
---|
| 1924 | ViewCellContainer::const_iterator it, it_end = leaves.end();
|
---|
| 1925 |
|
---|
| 1926 | for (it = leaves.begin(); it != it_end; ++ it)
|
---|
| 1927 | {
|
---|
| 1928 | VspLeaf *l = dynamic_cast<BspViewCell *>(*it)->mLeaf;
|
---|
| 1929 | l->SetViewCell(GetOrCreateOutOfBoundsCell());
|
---|
| 1930 | ++ mVspStats.invalidLeaves;
|
---|
| 1931 | }
|
---|
| 1932 |
|
---|
| 1933 | // add to unbounded view cell
|
---|
[1545] | 1934 | ViewCell *outOfBounds = GetOrCreateOutOfBoundsCell();
|
---|
| 1935 | outOfBounds->GetPvs().AddPvs(viewCell->GetPvs());
|
---|
[1237] | 1936 | DEL_PTR(viewCell);
|
---|
| 1937 | }
|
---|
| 1938 | }
|
---|
| 1939 | else
|
---|
| 1940 | {
|
---|
| 1941 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 1942 |
|
---|
| 1943 | nodeStack.push(interior->GetFront());
|
---|
| 1944 | nodeStack.push(interior->GetBack());
|
---|
| 1945 | }
|
---|
| 1946 | }
|
---|
| 1947 |
|
---|
| 1948 | Debug << "invalid leaves: " << mVspStats.invalidLeaves << endl;
|
---|
| 1949 | #endif
|
---|
| 1950 | }
|
---|
| 1951 |
|
---|
| 1952 |
|
---|
| 1953 | void VspTree::CollectRays(VssRayContainer &rays)
|
---|
| 1954 | {
|
---|
| 1955 | vector<VspLeaf *> leaves;
|
---|
| 1956 | CollectLeaves(leaves);
|
---|
| 1957 |
|
---|
| 1958 | vector<VspLeaf *>::const_iterator lit, lit_end = leaves.end();
|
---|
| 1959 |
|
---|
| 1960 | for (lit = leaves.begin(); lit != lit_end; ++ lit)
|
---|
| 1961 | {
|
---|
| 1962 | VspLeaf *leaf = *lit;
|
---|
| 1963 | VssRayContainer::const_iterator rit, rit_end = leaf->mVssRays.end();
|
---|
| 1964 |
|
---|
| 1965 | for (rit = leaf->mVssRays.begin(); rit != rit_end; ++ rit)
|
---|
| 1966 | rays.push_back(*rit);
|
---|
| 1967 | }
|
---|
| 1968 | }
|
---|
| 1969 |
|
---|
| 1970 |
|
---|
| 1971 | void VspTree::SetViewCellsManager(ViewCellsManager *vcm)
|
---|
| 1972 | {
|
---|
| 1973 | mViewCellsManager = vcm;
|
---|
| 1974 | }
|
---|
| 1975 |
|
---|
| 1976 |
|
---|
| 1977 | void VspTree::ValidateTree()
|
---|
| 1978 | {
|
---|
| 1979 | if (!mRoot)
|
---|
| 1980 | return;
|
---|
| 1981 |
|
---|
[1545] | 1982 | mVspStats.invalidLeaves = 0;
|
---|
| 1983 | stack<VspNode *> nodeStack;
|
---|
| 1984 |
|
---|
[1237] | 1985 | nodeStack.push(mRoot);
|
---|
| 1986 |
|
---|
| 1987 | while (!nodeStack.empty())
|
---|
| 1988 | {
|
---|
| 1989 | VspNode *node = nodeStack.top();
|
---|
| 1990 | nodeStack.pop();
|
---|
| 1991 |
|
---|
| 1992 | if (node->IsLeaf())
|
---|
| 1993 | {
|
---|
| 1994 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
| 1995 |
|
---|
| 1996 | if (!leaf->GetViewCell()->GetValid())
|
---|
| 1997 | ++ mVspStats.invalidLeaves;
|
---|
| 1998 |
|
---|
| 1999 | // validity flags don't match => repair
|
---|
| 2000 | if (leaf->GetViewCell()->GetValid() != leaf->TreeValid())
|
---|
| 2001 | {
|
---|
| 2002 | leaf->SetTreeValid(leaf->GetViewCell()->GetValid());
|
---|
| 2003 | PropagateUpValidity(leaf);
|
---|
| 2004 | }
|
---|
| 2005 | }
|
---|
| 2006 | else
|
---|
| 2007 | {
|
---|
| 2008 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2009 |
|
---|
| 2010 | nodeStack.push(interior->GetFront());
|
---|
| 2011 | nodeStack.push(interior->GetBack());
|
---|
| 2012 | }
|
---|
| 2013 | }
|
---|
| 2014 |
|
---|
| 2015 | Debug << "invalid leaves: " << mVspStats.invalidLeaves << endl;
|
---|
| 2016 | }
|
---|
| 2017 |
|
---|
| 2018 |
|
---|
| 2019 |
|
---|
| 2020 | void VspTree::CollectViewCells(VspNode *root,
|
---|
| 2021 | bool onlyValid,
|
---|
| 2022 | ViewCellContainer &viewCells,
|
---|
| 2023 | bool onlyUnmailed) const
|
---|
| 2024 | {
|
---|
| 2025 | if (!root)
|
---|
| 2026 | return;
|
---|
| 2027 |
|
---|
[1545] | 2028 | stack<VspNode *> nodeStack;
|
---|
[1237] | 2029 | nodeStack.push(root);
|
---|
| 2030 |
|
---|
| 2031 | while (!nodeStack.empty())
|
---|
| 2032 | {
|
---|
| 2033 | VspNode *node = nodeStack.top();
|
---|
| 2034 | nodeStack.pop();
|
---|
| 2035 |
|
---|
| 2036 | if (node->IsLeaf())
|
---|
| 2037 | {
|
---|
| 2038 | if (!onlyValid || node->TreeValid())
|
---|
| 2039 | {
|
---|
| 2040 | ViewCellLeaf *leafVc = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
| 2041 |
|
---|
| 2042 | ViewCell *viewCell = mViewCellsTree->GetActiveViewCell(leafVc);
|
---|
| 2043 |
|
---|
| 2044 | if (!onlyUnmailed || !viewCell->Mailed())
|
---|
| 2045 | {
|
---|
| 2046 | viewCell->Mail();
|
---|
| 2047 | viewCells.push_back(viewCell);
|
---|
| 2048 | }
|
---|
| 2049 | }
|
---|
| 2050 | }
|
---|
| 2051 | else
|
---|
| 2052 | {
|
---|
| 2053 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2054 |
|
---|
| 2055 | nodeStack.push(interior->GetFront());
|
---|
| 2056 | nodeStack.push(interior->GetBack());
|
---|
| 2057 | }
|
---|
| 2058 | }
|
---|
| 2059 | }
|
---|
| 2060 |
|
---|
| 2061 |
|
---|
| 2062 | int VspTree::FindNeighbors(VspLeaf *n,
|
---|
| 2063 | vector<VspLeaf *> &neighbors,
|
---|
| 2064 | const bool onlyUnmailed) const
|
---|
| 2065 | {
|
---|
| 2066 | stack<VspNode *> nodeStack;
|
---|
| 2067 | nodeStack.push(mRoot);
|
---|
| 2068 |
|
---|
| 2069 | const AxisAlignedBox3 box = GetBoundingBox(n);
|
---|
| 2070 |
|
---|
| 2071 | while (!nodeStack.empty())
|
---|
| 2072 | {
|
---|
| 2073 | VspNode *node = nodeStack.top();
|
---|
| 2074 | nodeStack.pop();
|
---|
| 2075 |
|
---|
| 2076 | if (node->IsLeaf())
|
---|
| 2077 | {
|
---|
| 2078 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
| 2079 |
|
---|
| 2080 | if (leaf != n && (!onlyUnmailed || !leaf->Mailed()))
|
---|
| 2081 | neighbors.push_back(leaf);
|
---|
| 2082 | }
|
---|
| 2083 | else
|
---|
| 2084 | {
|
---|
| 2085 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2086 |
|
---|
| 2087 | if (interior->GetPosition() > box.Max(interior->GetAxis()))
|
---|
| 2088 | nodeStack.push(interior->GetBack());
|
---|
| 2089 | else
|
---|
| 2090 | {
|
---|
| 2091 | if (interior->GetPosition() < box.Min(interior->GetAxis()))
|
---|
| 2092 | nodeStack.push(interior->GetFront());
|
---|
| 2093 | else
|
---|
| 2094 | {
|
---|
| 2095 | // random decision
|
---|
| 2096 | nodeStack.push(interior->GetBack());
|
---|
| 2097 | nodeStack.push(interior->GetFront());
|
---|
| 2098 | }
|
---|
| 2099 | }
|
---|
| 2100 | }
|
---|
| 2101 | }
|
---|
| 2102 |
|
---|
| 2103 | return (int)neighbors.size();
|
---|
| 2104 | }
|
---|
| 2105 |
|
---|
| 2106 |
|
---|
| 2107 | // Find random neighbor which was not mailed
|
---|
| 2108 | VspLeaf *VspTree::GetRandomLeaf(const Plane3 &plane)
|
---|
| 2109 | {
|
---|
| 2110 | stack<VspNode *> nodeStack;
|
---|
| 2111 | nodeStack.push(mRoot);
|
---|
| 2112 |
|
---|
| 2113 | int mask = rand();
|
---|
| 2114 |
|
---|
| 2115 | while (!nodeStack.empty())
|
---|
| 2116 | {
|
---|
| 2117 | VspNode *node = nodeStack.top();
|
---|
| 2118 |
|
---|
| 2119 | nodeStack.pop();
|
---|
| 2120 |
|
---|
| 2121 | if (node->IsLeaf())
|
---|
| 2122 | {
|
---|
| 2123 | return dynamic_cast<VspLeaf *>(node);
|
---|
| 2124 | }
|
---|
| 2125 | else
|
---|
| 2126 | {
|
---|
| 2127 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2128 | VspNode *next;
|
---|
| 2129 |
|
---|
| 2130 | if (GetBoundingBox(interior->GetBack()).Side(plane) < 0)
|
---|
| 2131 | {
|
---|
| 2132 | next = interior->GetFront();
|
---|
| 2133 | }
|
---|
| 2134 | else
|
---|
| 2135 | {
|
---|
| 2136 | if (GetBoundingBox(interior->GetFront()).Side(plane) < 0)
|
---|
| 2137 | {
|
---|
| 2138 | next = interior->GetBack();
|
---|
| 2139 | }
|
---|
| 2140 | else
|
---|
| 2141 | {
|
---|
| 2142 | // random decision
|
---|
| 2143 | if (mask & 1)
|
---|
| 2144 | next = interior->GetBack();
|
---|
| 2145 | else
|
---|
| 2146 | next = interior->GetFront();
|
---|
| 2147 | mask = mask >> 1;
|
---|
| 2148 | }
|
---|
| 2149 | }
|
---|
| 2150 |
|
---|
| 2151 | nodeStack.push(next);
|
---|
| 2152 | }
|
---|
| 2153 | }
|
---|
| 2154 |
|
---|
| 2155 | return NULL;
|
---|
| 2156 | }
|
---|
| 2157 |
|
---|
| 2158 |
|
---|
| 2159 | VspLeaf *VspTree::GetRandomLeaf(const bool onlyUnmailed)
|
---|
| 2160 | {
|
---|
| 2161 | stack<VspNode *> nodeStack;
|
---|
| 2162 |
|
---|
| 2163 | nodeStack.push(mRoot);
|
---|
| 2164 |
|
---|
| 2165 | int mask = rand();
|
---|
| 2166 |
|
---|
| 2167 | while (!nodeStack.empty())
|
---|
| 2168 | {
|
---|
| 2169 | VspNode *node = nodeStack.top();
|
---|
| 2170 | nodeStack.pop();
|
---|
| 2171 |
|
---|
| 2172 | if (node->IsLeaf())
|
---|
| 2173 | {
|
---|
| 2174 | if ( (!onlyUnmailed || !node->Mailed()) )
|
---|
| 2175 | return dynamic_cast<VspLeaf *>(node);
|
---|
| 2176 | }
|
---|
| 2177 | else
|
---|
| 2178 | {
|
---|
| 2179 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2180 |
|
---|
| 2181 | // random decision
|
---|
| 2182 | if (mask & 1)
|
---|
| 2183 | nodeStack.push(interior->GetBack());
|
---|
| 2184 | else
|
---|
| 2185 | nodeStack.push(interior->GetFront());
|
---|
| 2186 |
|
---|
| 2187 | mask = mask >> 1;
|
---|
| 2188 | }
|
---|
| 2189 | }
|
---|
| 2190 |
|
---|
| 2191 | return NULL;
|
---|
| 2192 | }
|
---|
| 2193 |
|
---|
| 2194 |
|
---|
[1259] | 2195 | int VspTree::EvalPvsSize(const RayInfoContainer &rays) const
|
---|
| 2196 | {
|
---|
| 2197 | int pvsSize = 0;
|
---|
| 2198 |
|
---|
| 2199 | Intersectable::NewMail();
|
---|
| 2200 | KdNode::NewMail();
|
---|
[1297] | 2201 | BvhLeaf::NewMail();
|
---|
[1259] | 2202 |
|
---|
| 2203 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 2204 |
|
---|
| 2205 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
| 2206 | {
|
---|
| 2207 | VssRay *ray = (*rit).mRay;
|
---|
[1291] | 2208 |
|
---|
| 2209 | pvsSize += EvalContributionToPvs(*ray, true);
|
---|
| 2210 | pvsSize += EvalContributionToPvs(*ray, false);
|
---|
[1259] | 2211 | }
|
---|
| 2212 |
|
---|
[1237] | 2213 | return pvsSize;
|
---|
| 2214 | }
|
---|
| 2215 |
|
---|
| 2216 |
|
---|
[1576] | 2217 | int VspTree::EvalPvsEntriesContribution(const VssRay &ray,
|
---|
| 2218 | const bool isTermination) const
|
---|
| 2219 |
|
---|
| 2220 | {
|
---|
| 2221 | Intersectable *obj;
|
---|
| 2222 | Vector3 pt;
|
---|
| 2223 | KdNode *node;
|
---|
| 2224 |
|
---|
| 2225 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 2226 | if (!obj) return 0;
|
---|
| 2227 |
|
---|
| 2228 | switch(mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
| 2229 | {
|
---|
| 2230 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
| 2231 | {
|
---|
| 2232 | if (!obj->Mailed())
|
---|
| 2233 | {
|
---|
| 2234 | obj->Mail();
|
---|
| 2235 | return 1;
|
---|
| 2236 | }
|
---|
| 2237 |
|
---|
| 2238 | return 0;
|
---|
| 2239 | }
|
---|
| 2240 |
|
---|
| 2241 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 2242 | {
|
---|
| 2243 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 2244 | if (!leaf->Mailed())
|
---|
| 2245 | {
|
---|
| 2246 | leaf->Mail();
|
---|
| 2247 | return 1;
|
---|
| 2248 | }
|
---|
| 2249 |
|
---|
| 2250 | return 0;
|
---|
| 2251 | }
|
---|
| 2252 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 2253 | {
|
---|
| 2254 | BvhLeaf *bvhleaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 2255 |
|
---|
| 2256 | if (!bvhleaf->Mailed())
|
---|
| 2257 | {
|
---|
| 2258 | bvhleaf->Mail();
|
---|
| 2259 | return 1;
|
---|
| 2260 | }
|
---|
| 2261 |
|
---|
| 2262 | return 0;
|
---|
| 2263 | }
|
---|
| 2264 | default:
|
---|
| 2265 | break;
|
---|
| 2266 | }
|
---|
| 2267 |
|
---|
| 2268 | return 0;
|
---|
| 2269 | }
|
---|
| 2270 |
|
---|
| 2271 |
|
---|
| 2272 | int VspTree::EvalPvsEntriesSize(const RayInfoContainer &rays) const
|
---|
| 2273 | {
|
---|
| 2274 | int pvsSize = 0;
|
---|
| 2275 |
|
---|
| 2276 | Intersectable::NewMail();
|
---|
| 2277 | KdNode::NewMail();
|
---|
| 2278 | BvhLeaf::NewMail();
|
---|
| 2279 |
|
---|
| 2280 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 2281 |
|
---|
| 2282 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
| 2283 | {
|
---|
| 2284 | VssRay *ray = (*rit).mRay;
|
---|
| 2285 |
|
---|
| 2286 | pvsSize += EvalPvsEntriesContribution(*ray, true);
|
---|
| 2287 | pvsSize += EvalPvsEntriesContribution(*ray, false);
|
---|
| 2288 | }
|
---|
| 2289 |
|
---|
| 2290 | return pvsSize;
|
---|
| 2291 | }
|
---|
| 2292 |
|
---|
| 2293 |
|
---|
[1237] | 2294 | float VspTree::GetEpsilon() const
|
---|
| 2295 | {
|
---|
| 2296 | return mEpsilon;
|
---|
| 2297 | }
|
---|
| 2298 |
|
---|
| 2299 |
|
---|
| 2300 | int VspTree::CastLineSegment(const Vector3 &origin,
|
---|
| 2301 | const Vector3 &termination,
|
---|
[1291] | 2302 | ViewCellContainer &viewcells,
|
---|
| 2303 | const bool useMailboxing)
|
---|
[1237] | 2304 | {
|
---|
| 2305 | int hits = 0;
|
---|
| 2306 |
|
---|
| 2307 | float mint = 0.0f, maxt = 1.0f;
|
---|
| 2308 | const Vector3 dir = termination - origin;
|
---|
| 2309 |
|
---|
| 2310 | stack<LineTraversalData> tStack;
|
---|
| 2311 |
|
---|
| 2312 | Vector3 entp = origin;
|
---|
| 2313 | Vector3 extp = termination;
|
---|
| 2314 |
|
---|
| 2315 | VspNode *node = mRoot;
|
---|
| 2316 | VspNode *farChild;
|
---|
| 2317 |
|
---|
| 2318 | float position;
|
---|
| 2319 | int axis;
|
---|
| 2320 |
|
---|
| 2321 | while (1)
|
---|
| 2322 | {
|
---|
| 2323 | if (!node->IsLeaf())
|
---|
| 2324 | {
|
---|
| 2325 | VspInterior *in = dynamic_cast<VspInterior *>(node);
|
---|
| 2326 | position = in->GetPosition();
|
---|
| 2327 | axis = in->GetAxis();
|
---|
| 2328 |
|
---|
| 2329 | if (entp[axis] <= position)
|
---|
| 2330 | {
|
---|
| 2331 | if (extp[axis] <= position)
|
---|
| 2332 | {
|
---|
| 2333 | node = in->GetBack();
|
---|
| 2334 | // cases N1,N2,N3,P5,Z2,Z3
|
---|
| 2335 | continue;
|
---|
| 2336 | } else
|
---|
| 2337 | {
|
---|
| 2338 | // case N4
|
---|
| 2339 | node = in->GetBack();
|
---|
| 2340 | farChild = in->GetFront();
|
---|
| 2341 | }
|
---|
| 2342 | }
|
---|
| 2343 | else
|
---|
| 2344 | {
|
---|
| 2345 | if (position <= extp[axis])
|
---|
| 2346 | {
|
---|
| 2347 | node = in->GetFront();
|
---|
| 2348 | // cases P1,P2,P3,N5,Z1
|
---|
| 2349 | continue;
|
---|
| 2350 | }
|
---|
| 2351 | else
|
---|
| 2352 | {
|
---|
| 2353 | node = in->GetFront();
|
---|
| 2354 | farChild = in->GetBack();
|
---|
| 2355 | // case P4
|
---|
| 2356 | }
|
---|
| 2357 | }
|
---|
| 2358 |
|
---|
| 2359 | // $$ modification 3.5.2004 - hints from Kamil Ghais
|
---|
| 2360 | // case N4 or P4
|
---|
| 2361 | const float tdist = (position - origin[axis]) / dir[axis];
|
---|
| 2362 | tStack.push(LineTraversalData(farChild, extp, maxt)); //TODO
|
---|
| 2363 |
|
---|
| 2364 | extp = origin + dir * tdist;
|
---|
| 2365 | maxt = tdist;
|
---|
| 2366 | }
|
---|
| 2367 | else
|
---|
| 2368 | {
|
---|
| 2369 | // compute intersection with all objects in this leaf
|
---|
| 2370 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
[1586] | 2371 | ViewCell *viewCell;
|
---|
| 2372 | if (0)
|
---|
| 2373 | viewCell = mViewCellsTree->GetActiveViewCell(leaf->GetViewCell());
|
---|
| 2374 | else
|
---|
| 2375 | viewCell = leaf->GetViewCell();
|
---|
[1237] | 2376 |
|
---|
[1291] | 2377 | // don't have to mail if each view cell belongs to exactly one leaf
|
---|
[1586] | 2378 | if (!useMailboxing || !viewCell->Mailed())
|
---|
[1291] | 2379 | {
|
---|
| 2380 | if (useMailboxing)
|
---|
[1586] | 2381 | viewCell->Mail();
|
---|
[1291] | 2382 |
|
---|
[1586] | 2383 | viewcells.push_back(viewCell);
|
---|
[1237] | 2384 | ++ hits;
|
---|
[1291] | 2385 | }
|
---|
[1586] | 2386 |
|
---|
[1237] | 2387 | // get the next node from the stack
|
---|
| 2388 | if (tStack.empty())
|
---|
| 2389 | break;
|
---|
| 2390 |
|
---|
| 2391 | entp = extp;
|
---|
| 2392 | mint = maxt;
|
---|
| 2393 |
|
---|
| 2394 | LineTraversalData &s = tStack.top();
|
---|
| 2395 | node = s.mNode;
|
---|
| 2396 | extp = s.mExitPoint;
|
---|
| 2397 | maxt = s.mMaxT;
|
---|
[1586] | 2398 |
|
---|
[1237] | 2399 | tStack.pop();
|
---|
| 2400 | }
|
---|
| 2401 | }
|
---|
| 2402 |
|
---|
| 2403 | return hits;
|
---|
| 2404 | }
|
---|
| 2405 |
|
---|
| 2406 |
|
---|
| 2407 | int VspTree::CastRay(Ray &ray)
|
---|
| 2408 | {
|
---|
| 2409 | int hits = 0;
|
---|
| 2410 |
|
---|
| 2411 | stack<LineTraversalData> tStack;
|
---|
| 2412 | const Vector3 dir = ray.GetDir();
|
---|
| 2413 |
|
---|
| 2414 | float maxt, mint;
|
---|
| 2415 |
|
---|
| 2416 | if (!mBoundingBox.GetRaySegment(ray, mint, maxt))
|
---|
| 2417 | return 0;
|
---|
| 2418 |
|
---|
| 2419 | Intersectable::NewMail();
|
---|
| 2420 | ViewCell::NewMail();
|
---|
| 2421 |
|
---|
| 2422 | Vector3 entp = ray.Extrap(mint);
|
---|
| 2423 | Vector3 extp = ray.Extrap(maxt);
|
---|
| 2424 |
|
---|
| 2425 | const Vector3 origin = entp;
|
---|
| 2426 |
|
---|
| 2427 | VspNode *node = mRoot;
|
---|
| 2428 | VspNode *farChild = NULL;
|
---|
| 2429 |
|
---|
| 2430 | float position;
|
---|
| 2431 | int axis;
|
---|
| 2432 |
|
---|
| 2433 | while (1)
|
---|
| 2434 | {
|
---|
| 2435 | if (!node->IsLeaf())
|
---|
| 2436 | {
|
---|
| 2437 | VspInterior *in = dynamic_cast<VspInterior *>(node);
|
---|
| 2438 | position = in->GetPosition();
|
---|
| 2439 | axis = in->GetAxis();
|
---|
| 2440 |
|
---|
| 2441 | if (entp[axis] <= position)
|
---|
| 2442 | {
|
---|
| 2443 | if (extp[axis] <= position)
|
---|
| 2444 | {
|
---|
| 2445 | node = in->GetBack();
|
---|
| 2446 | // cases N1,N2,N3,P5,Z2,Z3
|
---|
| 2447 | continue;
|
---|
| 2448 | }
|
---|
| 2449 | else
|
---|
| 2450 | {
|
---|
| 2451 | // case N4
|
---|
| 2452 | node = in->GetBack();
|
---|
| 2453 | farChild = in->GetFront();
|
---|
| 2454 | }
|
---|
| 2455 | }
|
---|
| 2456 | else
|
---|
| 2457 | {
|
---|
| 2458 | if (position <= extp[axis])
|
---|
| 2459 | {
|
---|
| 2460 | node = in->GetFront();
|
---|
| 2461 | // cases P1,P2,P3,N5,Z1
|
---|
| 2462 | continue;
|
---|
| 2463 | }
|
---|
| 2464 | else
|
---|
| 2465 | {
|
---|
| 2466 | node = in->GetFront();
|
---|
| 2467 | farChild = in->GetBack();
|
---|
| 2468 | // case P4
|
---|
| 2469 | }
|
---|
| 2470 | }
|
---|
| 2471 |
|
---|
| 2472 | // $$ modification 3.5.2004 - hints from Kamil Ghais
|
---|
| 2473 | // case N4 or P4
|
---|
| 2474 | const float tdist = (position - origin[axis]) / dir[axis];
|
---|
| 2475 | tStack.push(LineTraversalData(farChild, extp, maxt)); //TODO
|
---|
| 2476 | extp = origin + dir * tdist;
|
---|
| 2477 | maxt = tdist;
|
---|
| 2478 | }
|
---|
| 2479 | else
|
---|
| 2480 | {
|
---|
| 2481 | // compute intersection with all objects in this leaf
|
---|
| 2482 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
| 2483 | ViewCell *vc = leaf->GetViewCell();
|
---|
| 2484 |
|
---|
| 2485 | if (!vc->Mailed())
|
---|
| 2486 | {
|
---|
| 2487 | vc->Mail();
|
---|
| 2488 | // todo: add view cells to ray
|
---|
| 2489 | ++ hits;
|
---|
| 2490 | }
|
---|
| 2491 | #if 0
|
---|
| 2492 | leaf->mRays.push_back(RayInfo(new VssRay(origin, termination, NULL, NULL, 0)));
|
---|
| 2493 | #endif
|
---|
| 2494 | // get the next node from the stack
|
---|
| 2495 | if (tStack.empty())
|
---|
| 2496 | break;
|
---|
| 2497 |
|
---|
| 2498 | entp = extp;
|
---|
| 2499 | mint = maxt;
|
---|
| 2500 |
|
---|
| 2501 | LineTraversalData &s = tStack.top();
|
---|
| 2502 | node = s.mNode;
|
---|
| 2503 | extp = s.mExitPoint;
|
---|
| 2504 | maxt = s.mMaxT;
|
---|
| 2505 | tStack.pop();
|
---|
| 2506 | }
|
---|
| 2507 | }
|
---|
| 2508 |
|
---|
| 2509 | return hits;
|
---|
| 2510 | }
|
---|
| 2511 |
|
---|
| 2512 |
|
---|
| 2513 | ViewCell *VspTree::GetViewCell(const Vector3 &point, const bool active)
|
---|
| 2514 | {
|
---|
| 2515 | if (mRoot == NULL)
|
---|
| 2516 | return NULL;
|
---|
| 2517 |
|
---|
| 2518 | stack<VspNode *> nodeStack;
|
---|
| 2519 | nodeStack.push(mRoot);
|
---|
| 2520 |
|
---|
| 2521 | ViewCellLeaf *viewcell = NULL;
|
---|
| 2522 |
|
---|
| 2523 | while (!nodeStack.empty())
|
---|
| 2524 | {
|
---|
| 2525 | VspNode *node = nodeStack.top();
|
---|
| 2526 | nodeStack.pop();
|
---|
| 2527 |
|
---|
| 2528 | if (node->IsLeaf())
|
---|
| 2529 | {
|
---|
[1588] | 2530 | /*const AxisAlignedBox3 box = GetBoundingBox(dynamic_cast<VspLeaf *>(node));
|
---|
| 2531 | if (!box.IsInside(point))
|
---|
| 2532 | cerr << "error, point " << point << " should be in view cell " << box << endl;
|
---|
| 2533 | */
|
---|
[1237] | 2534 | viewcell = dynamic_cast<VspLeaf *>(node)->GetViewCell();
|
---|
| 2535 | break;
|
---|
| 2536 | }
|
---|
| 2537 | else
|
---|
| 2538 | {
|
---|
| 2539 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2540 |
|
---|
| 2541 | // random decision
|
---|
| 2542 | if (interior->GetPosition() - point[interior->GetAxis()] < 0)
|
---|
[1588] | 2543 | {
|
---|
| 2544 | nodeStack.push(interior->GetFront());
|
---|
| 2545 | }
|
---|
| 2546 | else
|
---|
| 2547 | {
|
---|
[1237] | 2548 | nodeStack.push(interior->GetBack());
|
---|
[1588] | 2549 | }
|
---|
[1237] | 2550 | }
|
---|
| 2551 | }
|
---|
| 2552 |
|
---|
| 2553 | if (active)
|
---|
[1586] | 2554 | {
|
---|
[1237] | 2555 | return mViewCellsTree->GetActiveViewCell(viewcell);
|
---|
[1586] | 2556 | }
|
---|
[1237] | 2557 | else
|
---|
[1586] | 2558 | {
|
---|
[1237] | 2559 | return viewcell;
|
---|
[1586] | 2560 | }
|
---|
[1237] | 2561 | }
|
---|
| 2562 |
|
---|
| 2563 |
|
---|
| 2564 | bool VspTree::ViewPointValid(const Vector3 &viewPoint) const
|
---|
| 2565 | {
|
---|
| 2566 | VspNode *node = mRoot;
|
---|
| 2567 |
|
---|
| 2568 | while (1)
|
---|
| 2569 | {
|
---|
| 2570 | // early exit
|
---|
| 2571 | if (node->TreeValid())
|
---|
| 2572 | return true;
|
---|
| 2573 |
|
---|
| 2574 | if (node->IsLeaf())
|
---|
| 2575 | return false;
|
---|
| 2576 |
|
---|
| 2577 | VspInterior *in = dynamic_cast<VspInterior *>(node);
|
---|
| 2578 |
|
---|
| 2579 | if (in->GetPosition() - viewPoint[in->GetAxis()] <= 0)
|
---|
| 2580 | {
|
---|
| 2581 | node = in->GetBack();
|
---|
| 2582 | }
|
---|
| 2583 | else
|
---|
| 2584 | {
|
---|
| 2585 | node = in->GetFront();
|
---|
| 2586 | }
|
---|
| 2587 | }
|
---|
| 2588 |
|
---|
| 2589 | // should never come here
|
---|
| 2590 | return false;
|
---|
| 2591 | }
|
---|
| 2592 |
|
---|
| 2593 |
|
---|
| 2594 | void VspTree::PropagateUpValidity(VspNode *node)
|
---|
| 2595 | {
|
---|
| 2596 | const bool isValid = node->TreeValid();
|
---|
| 2597 |
|
---|
| 2598 | // propagative up invalid flag until only invalid nodes exist over this node
|
---|
| 2599 | if (!isValid)
|
---|
| 2600 | {
|
---|
| 2601 | while (!node->IsRoot() && node->GetParent()->TreeValid())
|
---|
| 2602 | {
|
---|
| 2603 | node = node->GetParent();
|
---|
| 2604 | node->SetTreeValid(false);
|
---|
| 2605 | }
|
---|
| 2606 | }
|
---|
| 2607 | else
|
---|
| 2608 | {
|
---|
| 2609 | // propagative up valid flag until one of the subtrees is invalid
|
---|
| 2610 | while (!node->IsRoot() && !node->TreeValid())
|
---|
| 2611 | {
|
---|
| 2612 | node = node->GetParent();
|
---|
| 2613 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2614 |
|
---|
| 2615 | // the parent is valid iff both leaves are valid
|
---|
| 2616 | node->SetTreeValid(interior->GetBack()->TreeValid() &&
|
---|
| 2617 | interior->GetFront()->TreeValid());
|
---|
| 2618 | }
|
---|
| 2619 | }
|
---|
| 2620 | }
|
---|
| 2621 |
|
---|
| 2622 |
|
---|
| 2623 | bool VspTree::Export(OUT_STREAM &stream)
|
---|
| 2624 | {
|
---|
| 2625 | ExportNode(mRoot, stream);
|
---|
| 2626 |
|
---|
| 2627 | return true;
|
---|
| 2628 | }
|
---|
| 2629 |
|
---|
| 2630 |
|
---|
| 2631 | void VspTree::ExportNode(VspNode *node, OUT_STREAM &stream)
|
---|
| 2632 | {
|
---|
| 2633 | if (node->IsLeaf())
|
---|
| 2634 | {
|
---|
| 2635 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(node);
|
---|
| 2636 | ViewCell *viewCell = mViewCellsTree->GetActiveViewCell(leaf->GetViewCell());
|
---|
| 2637 |
|
---|
| 2638 | int id = -1;
|
---|
| 2639 | if (viewCell != mOutOfBoundsCell)
|
---|
| 2640 | id = viewCell->GetId();
|
---|
| 2641 |
|
---|
| 2642 | stream << "<Leaf viewCellId=\"" << id << "\" />" << endl;
|
---|
| 2643 | }
|
---|
| 2644 | else
|
---|
| 2645 | {
|
---|
| 2646 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2647 |
|
---|
| 2648 | AxisAlignedPlane plane = interior->GetPlane();
|
---|
| 2649 | stream << "<Interior plane=\"" << plane.mPosition << " "
|
---|
| 2650 | << plane.mAxis << "\">" << endl;
|
---|
| 2651 |
|
---|
| 2652 | ExportNode(interior->GetBack(), stream);
|
---|
| 2653 | ExportNode(interior->GetFront(), stream);
|
---|
| 2654 |
|
---|
| 2655 | stream << "</Interior>" << endl;
|
---|
| 2656 | }
|
---|
| 2657 | }
|
---|
| 2658 |
|
---|
| 2659 |
|
---|
| 2660 | int VspTree::SplitRays(const AxisAlignedPlane &plane,
|
---|
| 2661 | RayInfoContainer &rays,
|
---|
| 2662 | RayInfoContainer &frontRays,
|
---|
| 2663 | RayInfoContainer &backRays) const
|
---|
| 2664 | {
|
---|
| 2665 | int splits = 0;
|
---|
| 2666 |
|
---|
| 2667 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 2668 |
|
---|
| 2669 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
| 2670 | {
|
---|
| 2671 | RayInfo bRay = *rit;
|
---|
| 2672 |
|
---|
| 2673 | VssRay *ray = bRay.mRay;
|
---|
| 2674 | float t;
|
---|
| 2675 |
|
---|
| 2676 | // get classification and receive new t
|
---|
| 2677 | // test if start point behind or in front of plane
|
---|
| 2678 | const int side = bRay.ComputeRayIntersection(plane.mAxis, plane.mPosition, t);
|
---|
| 2679 |
|
---|
| 2680 | if (side == 0)
|
---|
| 2681 | {
|
---|
| 2682 | ++ splits;
|
---|
| 2683 |
|
---|
| 2684 | if (ray->HasPosDir(plane.mAxis))
|
---|
| 2685 | {
|
---|
| 2686 | backRays.push_back(RayInfo(ray, bRay.GetMinT(), t));
|
---|
| 2687 | frontRays.push_back(RayInfo(ray, t, bRay.GetMaxT()));
|
---|
| 2688 | }
|
---|
| 2689 | else
|
---|
| 2690 | {
|
---|
| 2691 | frontRays.push_back(RayInfo(ray, bRay.GetMinT(), t));
|
---|
| 2692 | backRays.push_back(RayInfo(ray, t, bRay.GetMaxT()));
|
---|
| 2693 | }
|
---|
| 2694 | }
|
---|
| 2695 | else if (side == 1)
|
---|
| 2696 | {
|
---|
| 2697 | frontRays.push_back(bRay);
|
---|
| 2698 | }
|
---|
| 2699 | else
|
---|
| 2700 | {
|
---|
| 2701 | backRays.push_back(bRay);
|
---|
| 2702 | }
|
---|
| 2703 | }
|
---|
| 2704 |
|
---|
| 2705 | return splits;
|
---|
| 2706 | }
|
---|
| 2707 |
|
---|
| 2708 |
|
---|
| 2709 | AxisAlignedBox3 VspTree::GetBoundingBox(VspNode *node) const
|
---|
| 2710 | {
|
---|
| 2711 | if (!node->GetParent())
|
---|
| 2712 | return mBoundingBox;
|
---|
| 2713 |
|
---|
| 2714 | if (!node->IsLeaf())
|
---|
| 2715 | {
|
---|
| 2716 | return (dynamic_cast<VspInterior *>(node))->GetBoundingBox();
|
---|
| 2717 | }
|
---|
| 2718 |
|
---|
| 2719 | VspInterior *parent = dynamic_cast<VspInterior *>(node->GetParent());
|
---|
| 2720 |
|
---|
| 2721 | AxisAlignedBox3 box(parent->GetBoundingBox());
|
---|
| 2722 |
|
---|
| 2723 | if (parent->GetFront() == node)
|
---|
[1286] | 2724 | box.SetMin(parent->GetAxis(), parent->GetPosition());
|
---|
[1237] | 2725 | else
|
---|
[1286] | 2726 | box.SetMax(parent->GetAxis(), parent->GetPosition());
|
---|
[1237] | 2727 |
|
---|
| 2728 | return box;
|
---|
| 2729 | }
|
---|
| 2730 |
|
---|
| 2731 |
|
---|
| 2732 | int VspTree::ComputeBoxIntersections(const AxisAlignedBox3 &box,
|
---|
| 2733 | ViewCellContainer &viewCells) const
|
---|
| 2734 | {
|
---|
| 2735 | stack<VspNode *> nodeStack;
|
---|
| 2736 |
|
---|
| 2737 | ViewCell::NewMail();
|
---|
| 2738 |
|
---|
| 2739 | while (!nodeStack.empty())
|
---|
| 2740 | {
|
---|
| 2741 | VspNode *node = nodeStack.top();
|
---|
| 2742 | nodeStack.pop();
|
---|
| 2743 |
|
---|
| 2744 | const AxisAlignedBox3 bbox = GetBoundingBox(node);
|
---|
| 2745 |
|
---|
| 2746 | if (bbox.Includes(box))
|
---|
| 2747 | {
|
---|
| 2748 | // node geometry is contained in box
|
---|
| 2749 | CollectViewCells(node, true, viewCells, true);
|
---|
| 2750 | }
|
---|
| 2751 | else if (Overlap(bbox, box))
|
---|
| 2752 | {
|
---|
| 2753 | if (node->IsLeaf())
|
---|
| 2754 | {
|
---|
| 2755 | BspLeaf *leaf = dynamic_cast<BspLeaf *>(node);
|
---|
| 2756 |
|
---|
| 2757 | if (!leaf->GetViewCell()->Mailed() && leaf->TreeValid())
|
---|
| 2758 | {
|
---|
| 2759 | leaf->GetViewCell()->Mail();
|
---|
| 2760 | viewCells.push_back(leaf->GetViewCell());
|
---|
| 2761 | }
|
---|
| 2762 | }
|
---|
| 2763 | else
|
---|
| 2764 | {
|
---|
| 2765 | VspInterior *interior = dynamic_cast<VspInterior *>(node);
|
---|
| 2766 |
|
---|
| 2767 | VspNode *first = interior->GetFront();
|
---|
| 2768 | VspNode *second = interior->GetBack();
|
---|
| 2769 |
|
---|
| 2770 | nodeStack.push(first);
|
---|
| 2771 | nodeStack.push(second);
|
---|
| 2772 | }
|
---|
| 2773 | }
|
---|
| 2774 | // default: cull
|
---|
| 2775 | }
|
---|
| 2776 |
|
---|
| 2777 | return (int)viewCells.size();
|
---|
| 2778 | }
|
---|
| 2779 |
|
---|
| 2780 |
|
---|
| 2781 | void VspTree::PreprocessRays(const VssRayContainer &sampleRays,
|
---|
| 2782 | RayInfoContainer &rays)
|
---|
| 2783 | {
|
---|
| 2784 | VssRayContainer::const_iterator rit, rit_end = sampleRays.end();
|
---|
| 2785 |
|
---|
| 2786 | long startTime = GetTime();
|
---|
| 2787 |
|
---|
| 2788 | cout << "storing rays ... ";
|
---|
| 2789 |
|
---|
| 2790 | Intersectable::NewMail();
|
---|
| 2791 |
|
---|
| 2792 | //-- store rays and objects
|
---|
| 2793 | for (rit = sampleRays.begin(); rit != rit_end; ++ rit)
|
---|
| 2794 | {
|
---|
| 2795 | VssRay *ray = *rit;
|
---|
| 2796 | float minT, maxT;
|
---|
| 2797 | static Ray hray;
|
---|
| 2798 |
|
---|
| 2799 | hray.Init(*ray);
|
---|
| 2800 |
|
---|
| 2801 | // TODO: not very efficient to implictly cast between rays types
|
---|
| 2802 | if (GetBoundingBox().GetRaySegment(hray, minT, maxT))
|
---|
| 2803 | {
|
---|
| 2804 | float len = ray->Length();
|
---|
| 2805 |
|
---|
| 2806 | if (!len)
|
---|
| 2807 | len = Limits::Small;
|
---|
| 2808 |
|
---|
| 2809 | rays.push_back(RayInfo(ray, minT / len, maxT / len));
|
---|
| 2810 | }
|
---|
| 2811 | }
|
---|
| 2812 |
|
---|
| 2813 | cout << "finished in " << TimeDiff(startTime, GetTime()) * 1e-3 << " secs" << endl;
|
---|
| 2814 | }
|
---|
| 2815 |
|
---|
| 2816 |
|
---|
| 2817 | void VspTree::GetViewCells(const VssRay &ray, ViewCellContainer &viewCells)
|
---|
| 2818 | {
|
---|
| 2819 | static Ray hray;
|
---|
| 2820 | hray.Init(ray);
|
---|
| 2821 |
|
---|
| 2822 | float tmin = 0, tmax = 1.0;
|
---|
| 2823 |
|
---|
| 2824 | if (!mBoundingBox.GetRaySegment(hray, tmin, tmax) || (tmin > tmax))
|
---|
| 2825 | return;
|
---|
| 2826 |
|
---|
| 2827 | const Vector3 origin = hray.Extrap(tmin);
|
---|
| 2828 | const Vector3 termination = hray.Extrap(tmax);
|
---|
| 2829 |
|
---|
[1291] | 2830 | // view cells were not precomputed
|
---|
| 2831 | // don't mail because we need mailboxing for something else
|
---|
| 2832 | CastLineSegment(origin, termination, viewCells, false);
|
---|
[1237] | 2833 | }
|
---|
| 2834 |
|
---|
| 2835 |
|
---|
[1640] | 2836 | void VspTree::Initialise(const VssRayContainer &rays,
|
---|
| 2837 | AxisAlignedBox3 *forcedBoundingBox)
|
---|
| 2838 | {
|
---|
| 2839 | ComputeBoundingBox(rays, forcedBoundingBox);
|
---|
| 2840 |
|
---|
| 2841 | VspLeaf *leaf = new VspLeaf();
|
---|
| 2842 | mRoot = leaf;
|
---|
| 2843 |
|
---|
| 2844 | VspViewCell *viewCell = new VspViewCell();
|
---|
| 2845 | leaf->SetViewCell(viewCell);
|
---|
| 2846 |
|
---|
| 2847 | // set view cell values
|
---|
| 2848 | viewCell->mLeaves.push_back(leaf);
|
---|
| 2849 |
|
---|
| 2850 | viewCell->SetVolume(mBoundingBox.GetVolume());
|
---|
| 2851 | leaf->mProbability = mBoundingBox.GetVolume();
|
---|
| 2852 | }
|
---|
| 2853 |
|
---|
| 2854 |
|
---|
[1237] | 2855 | SubdivisionCandidate *VspTree::PrepareConstruction(const VssRayContainer &sampleRays,
|
---|
[1278] | 2856 | RayInfoContainer &rays)
|
---|
| 2857 | {
|
---|
[1308] | 2858 | mVspStats.Reset();
|
---|
| 2859 | mVspStats.Start();
|
---|
| 2860 | mVspStats.nodes = 1;
|
---|
| 2861 |
|
---|
[1237] | 2862 | // store pointer to this tree
|
---|
| 2863 | VspSubdivisionCandidate::sVspTree = this;
|
---|
[1308] | 2864 |
|
---|
[1237] | 2865 | // initialise termination criteria
|
---|
| 2866 | mTermMinProbability *= mBoundingBox.GetVolume();
|
---|
[1640] | 2867 |
|
---|
[1237] | 2868 | // get clipped rays
|
---|
| 2869 | PreprocessRays(sampleRays, rays);
|
---|
| 2870 |
|
---|
[1449] | 2871 | /// collect pvs from rays
|
---|
[1237] | 2872 | const int pvsSize = EvalPvsSize(rays);
|
---|
[1421] | 2873 |
|
---|
[1640] | 2874 | // root and bounding box were already constructed
|
---|
| 2875 | VspLeaf *leaf = dynamic_cast<VspLeaf *>(mRoot);
|
---|
[1237] | 2876 |
|
---|
[1421] | 2877 | //////////
|
---|
[1237] | 2878 | //-- prepare view space partition
|
---|
[1421] | 2879 |
|
---|
[1294] | 2880 | const float prop = mBoundingBox.GetVolume();
|
---|
| 2881 |
|
---|
[1237] | 2882 | // first vsp traversal data
|
---|
[1640] | 2883 | VspTraversalData vData(leaf, 0, &rays, pvsSize, prop, mBoundingBox);
|
---|
[1237] | 2884 |
|
---|
[1421] | 2885 |
|
---|
[1237] | 2886 | #if WORK_WITH_VIEWCELL_PVS
|
---|
| 2887 | // add first view cell to all the objects view cell pvs
|
---|
| 2888 | ObjectPvsMap::const_iterator oit,
|
---|
| 2889 | oit_end = leaf->GetViewCell()->GetPvs().mEntries.end();
|
---|
| 2890 |
|
---|
| 2891 | for (oit = leaf->GetViewCell()->GetPvs().mEntries.begin(); oit != oit_end; ++ oit)
|
---|
| 2892 | {
|
---|
| 2893 | Intersectable *obj = (*oit).first;
|
---|
| 2894 | obj->mViewCellPvs.AddSample(leaf->GetViewCell(), 1);
|
---|
| 2895 | }
|
---|
| 2896 | #endif
|
---|
| 2897 |
|
---|
[1421] | 2898 | //////////////
|
---|
| 2899 | //-- create the first split candidate
|
---|
[1308] | 2900 |
|
---|
[1237] | 2901 | VspSubdivisionCandidate *splitCandidate = new VspSubdivisionCandidate(vData);
|
---|
| 2902 | EvalSubdivisionCandidate(*splitCandidate);
|
---|
[1302] | 2903 | leaf->SetSubdivisionCandidate(splitCandidate);
|
---|
[1237] | 2904 |
|
---|
| 2905 | mTotalCost = (float)pvsSize;
|
---|
| 2906 | EvalSubdivisionStats(*splitCandidate);
|
---|
| 2907 |
|
---|
| 2908 | return splitCandidate;
|
---|
| 2909 | }
|
---|
| 2910 |
|
---|
| 2911 |
|
---|
[1294] | 2912 | void VspTree::CollectDirtyCandidate(const VssRay &ray,
|
---|
| 2913 | const bool isTermination,
|
---|
[1633] | 2914 | vector<SubdivisionCandidate *> &dirtyList,
|
---|
| 2915 | const bool onlyUnmailed) const
|
---|
[1294] | 2916 | {
|
---|
[1302] | 2917 |
|
---|
[1294] | 2918 | Intersectable *obj;
|
---|
| 2919 | Vector3 pt;
|
---|
| 2920 | KdNode *node;
|
---|
| 2921 |
|
---|
| 2922 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
[1302] | 2923 |
|
---|
[1294] | 2924 | if (!obj) return;
|
---|
[1633] | 2925 |
|
---|
| 2926 | SubdivisionCandidate *candidate = NULL;
|
---|
| 2927 |
|
---|
[1313] | 2928 | switch (mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
[1294] | 2929 | {
|
---|
| 2930 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 2931 | {
|
---|
| 2932 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 2933 |
|
---|
| 2934 | if (!leaf->Mailed())
|
---|
| 2935 | {
|
---|
| 2936 | leaf->Mail();
|
---|
[1633] | 2937 | candidate = leaf->mSubdivisionCandidate;
|
---|
[1294] | 2938 | }
|
---|
| 2939 | break;
|
---|
| 2940 | }
|
---|
| 2941 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 2942 | {
|
---|
[1302] | 2943 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 2944 |
|
---|
| 2945 | if (!leaf->Mailed())
|
---|
| 2946 | {
|
---|
| 2947 | leaf->Mail();
|
---|
[1633] | 2948 | candidate = leaf->GetSubdivisionCandidate();
|
---|
[1302] | 2949 | }
|
---|
| 2950 | break;
|
---|
[1294] | 2951 | }
|
---|
| 2952 | default:
|
---|
[1633] | 2953 | cerr << "not implemented yet" << endl;
|
---|
| 2954 | candidate = NULL;
|
---|
[1294] | 2955 | break;
|
---|
| 2956 | }
|
---|
[1633] | 2957 |
|
---|
| 2958 | // is this leaf still a split candidate?
|
---|
| 2959 | if (candidate && (!onlyUnmailed || !candidate->Mailed()))
|
---|
| 2960 | {
|
---|
| 2961 | candidate->Mail();
|
---|
| 2962 | dirtyList.push_back(candidate);
|
---|
| 2963 | }
|
---|
[1294] | 2964 | }
|
---|
| 2965 |
|
---|
| 2966 |
|
---|
[1259] | 2967 | void VspTree::CollectDirtyCandidates(VspSubdivisionCandidate *sc,
|
---|
[1633] | 2968 | vector<SubdivisionCandidate *> &dirtyList,
|
---|
| 2969 | const bool onlyUnmailed)
|
---|
[1259] | 2970 | {
|
---|
| 2971 | VspTraversalData &tData = sc->mParentData;
|
---|
| 2972 | VspLeaf *node = tData.mNode;
|
---|
| 2973 |
|
---|
| 2974 | KdLeaf::NewMail();
|
---|
[1294] | 2975 | BvhLeaf::NewMail();
|
---|
[1302] | 2976 |
|
---|
[1259] | 2977 | RayInfoContainer::const_iterator rit, rit_end = tData.mRays->end();
|
---|
| 2978 |
|
---|
| 2979 | // add all kd nodes seen by the rays
|
---|
| 2980 | for (rit = tData.mRays->begin(); rit != rit_end; ++ rit)
|
---|
| 2981 | {
|
---|
| 2982 | VssRay *ray = (*rit).mRay;
|
---|
[1302] | 2983 |
|
---|
[1633] | 2984 | CollectDirtyCandidate(*ray, true, dirtyList, onlyUnmailed);
|
---|
| 2985 | CollectDirtyCandidate(*ray, false, dirtyList, onlyUnmailed);
|
---|
[1259] | 2986 | }
|
---|
| 2987 | }
|
---|
| 2988 |
|
---|
[1291] | 2989 |
|
---|
| 2990 | int VspTree::EvalMaxEventContribution(const VssRay &ray,
|
---|
| 2991 | const bool isTermination) const
|
---|
| 2992 | {
|
---|
| 2993 | Intersectable *obj;
|
---|
| 2994 | Vector3 pt;
|
---|
| 2995 | KdNode *node;
|
---|
| 2996 |
|
---|
| 2997 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 2998 |
|
---|
| 2999 | if (!obj)
|
---|
| 3000 | return 0;
|
---|
| 3001 |
|
---|
| 3002 | int pvs = 0;
|
---|
| 3003 |
|
---|
[1313] | 3004 | switch (mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
[1291] | 3005 | {
|
---|
| 3006 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
| 3007 | {
|
---|
| 3008 | if (-- obj->mCounter == 0)
|
---|
| 3009 | ++ pvs;
|
---|
| 3010 | break;
|
---|
| 3011 | }
|
---|
| 3012 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 3013 | {
|
---|
| 3014 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 3015 |
|
---|
| 3016 | // add contributions of the kd nodes
|
---|
| 3017 | pvs += EvalMaxEventContribution(leaf);
|
---|
| 3018 | break;
|
---|
| 3019 | }
|
---|
| 3020 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 3021 | {
|
---|
| 3022 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 3023 |
|
---|
| 3024 | if (-- leaf->mCounter == 0)
|
---|
| 3025 | pvs += (int)leaf->mObjects.size();
|
---|
| 3026 | break;
|
---|
| 3027 | }
|
---|
| 3028 | default:
|
---|
| 3029 | break;
|
---|
| 3030 | }
|
---|
| 3031 |
|
---|
| 3032 | return pvs;
|
---|
| 3033 | }
|
---|
| 3034 |
|
---|
| 3035 |
|
---|
| 3036 | int VspTree::PrepareHeuristics(const VssRay &ray, const bool isTermination)
|
---|
| 3037 | {
|
---|
| 3038 | int pvsSize = 0;
|
---|
| 3039 |
|
---|
| 3040 | Intersectable *obj;
|
---|
| 3041 | Vector3 pt;
|
---|
| 3042 | KdNode *node;
|
---|
| 3043 |
|
---|
| 3044 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 3045 |
|
---|
| 3046 | if (!obj)
|
---|
| 3047 | return 0;
|
---|
| 3048 |
|
---|
[1313] | 3049 | switch (mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
[1291] | 3050 | {
|
---|
| 3051 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
| 3052 | {
|
---|
| 3053 | if (!obj->Mailed())
|
---|
| 3054 | {
|
---|
| 3055 | obj->Mail();
|
---|
| 3056 | obj->mCounter = 0;
|
---|
| 3057 | ++ pvsSize;
|
---|
| 3058 | }
|
---|
[1379] | 3059 |
|
---|
[1291] | 3060 | ++ obj->mCounter;
|
---|
| 3061 | break;
|
---|
| 3062 | }
|
---|
| 3063 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 3064 | {
|
---|
| 3065 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 3066 | pvsSize += PrepareHeuristics(leaf);
|
---|
| 3067 | break;
|
---|
| 3068 | }
|
---|
| 3069 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 3070 | {
|
---|
| 3071 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 3072 |
|
---|
| 3073 | if (!leaf->Mailed())
|
---|
| 3074 | {
|
---|
| 3075 | leaf->Mail();
|
---|
| 3076 | leaf->mCounter = 0;
|
---|
| 3077 | pvsSize += (int)leaf->mObjects.size();
|
---|
| 3078 | }
|
---|
[1379] | 3079 |
|
---|
[1291] | 3080 | ++ leaf->mCounter;
|
---|
| 3081 | break;
|
---|
| 3082 | }
|
---|
| 3083 | default:
|
---|
| 3084 | break;
|
---|
| 3085 | }
|
---|
| 3086 |
|
---|
| 3087 | return pvsSize;
|
---|
| 3088 | }
|
---|
| 3089 |
|
---|
| 3090 |
|
---|
| 3091 | int VspTree::EvalMinEventContribution(const VssRay &ray,
|
---|
| 3092 | const bool isTermination) const
|
---|
| 3093 | {
|
---|
| 3094 | Intersectable *obj;
|
---|
| 3095 | Vector3 pt;
|
---|
| 3096 | KdNode *node;
|
---|
| 3097 |
|
---|
| 3098 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 3099 |
|
---|
| 3100 | if (!obj) return 0;
|
---|
| 3101 |
|
---|
| 3102 | int pvs = 0;
|
---|
| 3103 |
|
---|
[1313] | 3104 | switch (mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
[1291] | 3105 | {
|
---|
| 3106 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
| 3107 | {
|
---|
| 3108 | if (!obj->Mailed())
|
---|
| 3109 | {
|
---|
| 3110 | obj->Mail();
|
---|
| 3111 | ++ pvs;
|
---|
| 3112 | }
|
---|
| 3113 | break;
|
---|
| 3114 | }
|
---|
| 3115 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 3116 | {
|
---|
| 3117 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 3118 | // add contributions of the kd nodes
|
---|
| 3119 | pvs += EvalMinEventContribution(leaf);
|
---|
| 3120 | break;
|
---|
| 3121 | }
|
---|
| 3122 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 3123 | {
|
---|
| 3124 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 3125 | if (!leaf->Mailed())
|
---|
| 3126 | {
|
---|
| 3127 | leaf->Mail();
|
---|
| 3128 | pvs += (int)leaf->mObjects.size();
|
---|
| 3129 | }
|
---|
| 3130 | break;
|
---|
| 3131 | }
|
---|
| 3132 | default:
|
---|
| 3133 | break;
|
---|
| 3134 | }
|
---|
| 3135 |
|
---|
| 3136 | return pvs;
|
---|
| 3137 | }
|
---|
| 3138 |
|
---|
| 3139 |
|
---|
| 3140 | void VspTree::UpdateContributionsToPvs(const VssRay &ray,
|
---|
| 3141 | const bool isTermination,
|
---|
| 3142 | const int cf,
|
---|
| 3143 | float &frontPvs,
|
---|
| 3144 | float &backPvs,
|
---|
| 3145 | float &totalPvs) const
|
---|
| 3146 | {
|
---|
| 3147 | Intersectable *obj;
|
---|
| 3148 | Vector3 pt;
|
---|
| 3149 | KdNode *node;
|
---|
| 3150 |
|
---|
| 3151 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 3152 |
|
---|
| 3153 | if (!obj) return;
|
---|
| 3154 |
|
---|
[1313] | 3155 | switch (mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
[1291] | 3156 | {
|
---|
| 3157 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
| 3158 | {
|
---|
| 3159 | // find front and back pvs for origing and termination object
|
---|
| 3160 | UpdateContributionsToPvs(obj, cf, frontPvs, backPvs, totalPvs);
|
---|
| 3161 | break;
|
---|
| 3162 | }
|
---|
| 3163 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 3164 | {
|
---|
| 3165 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 3166 | UpdateContributionsToPvs(leaf, cf, frontPvs, backPvs, totalPvs);
|
---|
| 3167 | break;
|
---|
| 3168 | }
|
---|
| 3169 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 3170 | {
|
---|
| 3171 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 3172 | UpdateContributionsToPvs(leaf, cf, frontPvs, backPvs, totalPvs);
|
---|
| 3173 | break;
|
---|
| 3174 | }
|
---|
| 3175 | }
|
---|
| 3176 | }
|
---|
| 3177 |
|
---|
| 3178 |
|
---|
[1576] | 3179 | void VspTree::UpdatePvsEntriesContribution(const VssRay &ray,
|
---|
| 3180 | const bool isTermination,
|
---|
| 3181 | const int cf,
|
---|
[1577] | 3182 | float &pvsFront,
|
---|
| 3183 | float &pvsBack,
|
---|
[1576] | 3184 | float &totalPvs) const
|
---|
| 3185 | {
|
---|
[1577] | 3186 | Intersectable *obj;
|
---|
| 3187 | Vector3 pt;
|
---|
| 3188 | KdNode *node;
|
---|
[1576] | 3189 |
|
---|
[1577] | 3190 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 3191 | if (!obj) return;
|
---|
| 3192 |
|
---|
[1576] | 3193 | switch (mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
| 3194 | {
|
---|
| 3195 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 3196 | // TODO
|
---|
| 3197 | break;
|
---|
| 3198 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 3199 | {
|
---|
| 3200 | BvhLeaf *leaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
[1580] | 3201 | UpdateContributionsToPvs(leaf, cf, pvsFront, pvsBack, totalPvs, true);
|
---|
[1576] | 3202 | break;
|
---|
| 3203 | }
|
---|
| 3204 | default:
|
---|
[1577] | 3205 | UpdateContributionsToPvs(obj, cf, pvsFront, pvsBack, totalPvs);
|
---|
[1576] | 3206 | break;
|
---|
[1577] | 3207 | }
|
---|
[1576] | 3208 | }
|
---|
| 3209 |
|
---|
| 3210 |
|
---|
| 3211 | int VspTree::EvalContributionToPvs(const VssRay &ray, const bool isTermination) const
|
---|
[1291] | 3212 | {
|
---|
| 3213 | Intersectable *obj;
|
---|
| 3214 | Vector3 pt;
|
---|
| 3215 | KdNode *node;
|
---|
| 3216 |
|
---|
| 3217 | ray.GetSampleData(isTermination, pt, &obj, &node);
|
---|
| 3218 |
|
---|
[1305] | 3219 | if (!obj) return 0;
|
---|
[1291] | 3220 |
|
---|
| 3221 | int pvs = 0;
|
---|
| 3222 |
|
---|
[1313] | 3223 | switch(mHierarchyManager->GetObjectSpaceSubdivisionType())
|
---|
[1291] | 3224 | {
|
---|
| 3225 | case HierarchyManager::NO_OBJ_SUBDIV:
|
---|
| 3226 | {
|
---|
| 3227 | if (!obj->Mailed())
|
---|
| 3228 | {
|
---|
| 3229 | obj->Mail();
|
---|
| 3230 | ++ pvs;
|
---|
| 3231 | }
|
---|
| 3232 | break;
|
---|
| 3233 | }
|
---|
| 3234 | case HierarchyManager::KD_BASED_OBJ_SUBDIV:
|
---|
| 3235 | {
|
---|
| 3236 | KdLeaf *leaf = mHierarchyManager->mOspTree->GetLeaf(pt, node);
|
---|
| 3237 | pvs += EvalContributionToPvs(leaf);
|
---|
| 3238 | break;
|
---|
| 3239 | }
|
---|
| 3240 | case HierarchyManager::BV_BASED_OBJ_SUBDIV:
|
---|
| 3241 | {
|
---|
| 3242 | BvhLeaf *bvhleaf = mHierarchyManager->mBvHierarchy->GetLeaf(obj);
|
---|
| 3243 |
|
---|
[1297] | 3244 | if (!bvhleaf->Mailed())
|
---|
[1291] | 3245 | {
|
---|
| 3246 | bvhleaf->Mail();
|
---|
| 3247 | pvs += (int)bvhleaf->mObjects.size();
|
---|
| 3248 | }
|
---|
| 3249 | break;
|
---|
| 3250 | }
|
---|
| 3251 | default:
|
---|
| 3252 | break;
|
---|
| 3253 | }
|
---|
| 3254 |
|
---|
| 3255 | return pvs;
|
---|
| 3256 | }
|
---|
| 3257 |
|
---|
| 3258 |
|
---|
| 3259 | int VspTree::EvalContributionToPvs(KdLeaf *leaf) const
|
---|
| 3260 | {
|
---|
| 3261 | if (leaf->Mailed()) // leaf already mailed
|
---|
| 3262 | return 0;
|
---|
[1308] | 3263 |
|
---|
[1291] | 3264 | leaf->Mail();
|
---|
| 3265 |
|
---|
[1576] | 3266 | // this is the pvs which is uniquely part of this kd leaf
|
---|
[1305] | 3267 | int pvs = (int)(leaf->mObjects.size() - leaf->mMultipleObjects.size());
|
---|
[1291] | 3268 |
|
---|
| 3269 | ObjectContainer::const_iterator oit, oit_end = leaf->mMultipleObjects.end();
|
---|
| 3270 |
|
---|
| 3271 | for (oit = leaf->mMultipleObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 3272 | {
|
---|
| 3273 | Intersectable *obj = *oit;
|
---|
| 3274 | if (!obj->Mailed())
|
---|
| 3275 | {
|
---|
| 3276 | obj->Mail();
|
---|
| 3277 | ++ pvs;
|
---|
| 3278 | }
|
---|
| 3279 | }
|
---|
| 3280 |
|
---|
| 3281 | return pvs;
|
---|
| 3282 | }
|
---|
| 3283 |
|
---|
[1305] | 3284 |
|
---|
[1580] | 3285 | }
|
---|