[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 "OspTree.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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[1237] | 20 | #include "VspTree.h"
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| 21 |
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| 22 |
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| 23 | namespace GtpVisibilityPreprocessor {
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| 24 |
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| 25 |
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| 26 | #define USE_FIXEDPOINT_T 0
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| 27 |
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| 28 |
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| 29 | //-- static members
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| 30 |
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| 31 | OspTree *OspTree::OspSubdivisionCandidate::sOspTree = NULL;
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| 32 |
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| 33 | // variable for debugging volume contribution for heuristics
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| 34 | static float debugVol;
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| 35 |
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| 36 | static bool ViewCellHasMultipleReferences(Intersectable *obj,
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| 37 | ViewCell *vc,
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| 38 | bool checkOnlyMailed)
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| 39 | {
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| 40 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
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| 41 | //return false;
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| 42 | if (vdata)
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| 43 | {
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| 44 | // more than one view cell sees this object inside different kd cells
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| 45 | if (!checkOnlyMailed || !vdata->Mailed())
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| 46 | {
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| 47 | if (checkOnlyMailed)
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| 48 | vdata->Mail();
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| 49 | //Debug << "sumpdf: " << vdata->mSumPdf << endl;
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| 50 | if (vdata->mSumPdf > 1.5f)
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| 51 | return true;
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | return false;
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| 56 | }
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| 57 |
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| 58 |
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| 59 | void OspTreeStatistics::Print(ostream &app) const
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| 60 | {
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| 61 | app << "=========== OspTree statistics ===============\n";
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| 62 |
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| 63 | app << setprecision(4);
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| 64 |
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| 65 | app << "#N_CTIME ( Construction time [s] )\n" << Time() << " \n";
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| 66 |
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| 67 | app << "#N_NODES ( Number of nodes )\n" << nodes << "\n";
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| 68 |
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| 69 | app << "#N_INTERIORS ( Number of interior nodes )\n" << Interior() << "\n";
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| 70 |
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| 71 | app << "#N_LEAVES ( Number of leaves )\n" << Leaves() << "\n";
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| 72 |
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| 73 | app << "#AXIS_ALIGNED_SPLITS (number of axis aligned splits)\n" << splits[0] + splits[1] + splits[2] << endl;
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| 74 |
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| 75 | app << "#N_SPLITS ( Number of splits in axes x y z)\n";
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| 76 |
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| 77 | for (int i = 0; i < 3; ++ i)
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| 78 | app << splits[i] << " ";
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| 79 | app << endl;
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| 80 |
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| 81 | app << "#N_PMAXDEPTHLEAVES ( Percentage of leaves at maximum depth )\n"
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| 82 | << maxDepthNodes * 100 / (double)Leaves() << endl;
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| 83 |
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| 84 | app << "#N_PMINPVSLEAVES ( Percentage of leaves with mininimal PVS )\n"
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| 85 | << minPvsNodes * 100 / (double)Leaves() << endl;
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| 86 |
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| 87 | //app << "#N_PMINOBJECTREFLEAVES ( Percentage of leaves with minimal number of object ref)\n"
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| 88 | //<< minObjectNodes * 100 / (double)Leaves() << endl;
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| 89 |
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| 90 | app << "#N_MAXCOSTNODES ( Percentage of leaves with terminated because of max cost ratio )\n"
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| 91 | << maxCostNodes * 100 / (double)Leaves() << endl;
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| 92 |
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| 93 | app << "#N_PMINPROBABILITYLEAVES ( Percentage of leaves with mininum probability )\n"
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| 94 | << minProbabilityNodes * 100 / (double)Leaves() << endl;
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| 95 |
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| 96 | app << "#N_PMAXDEPTH ( Maximal reached depth )\n" << maxDepth << endl;
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| 97 |
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| 98 | app << "#N_PMINDEPTH ( Minimal reached depth )\n" << minDepth << endl;
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| 99 |
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| 100 | app << "#AVGDEPTH ( average depth )\n" << AvgDepth() << endl;
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| 101 |
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| 102 | app << "#N_INVALIDLEAVES (number of invalid leaves )\n" << invalidLeaves << endl;
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| 103 |
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| 104 | app << "#N_MAXOBJECTREFS ( Max number of object refs / leaf )\n" <<
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| 105 | maxObjectRefs << "\n";
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| 106 |
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| 107 | // app << "#N_RAYS (number of rays / leaf)\n" << AvgRays() << endl;
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| 108 | //app << "#N_PVS: " << pvs << endl;
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| 109 |
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| 110 | app << "========== END OF VspTree statistics ==========\n";
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| 111 | }
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| 112 |
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| 113 |
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| 114 | /******************************************************************/
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| 115 | /* class VspNode implementation */
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| 116 | /******************************************************************/
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| 117 |
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| 118 |
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| 119 | /*******************************************************************/
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| 120 | /* class OspTree implementation */
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| 121 | /*******************************************************************/
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| 122 |
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| 123 |
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| 124 | OspTree::OspTree():
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| 125 | mRoot(NULL),
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| 126 | mTimeStamp(1),
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| 127 | mCopyFromKdTree(false)
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| 128 | {
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| 129 | ReadEnvironment();
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| 130 | mSubdivisionCandidates = new vector<SortableEntry>;
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| 131 | }
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| 132 |
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| 133 |
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| 134 | OspTree::OspTree(const KdTree &kdTree)
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| 135 | {
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| 136 | ReadEnvironment();
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| 137 |
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| 138 | // copy values from kd tree
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| 139 | mCopyFromKdTree = true;
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| 140 | mBoundingBox = kdTree.GetBox();
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| 141 | mRoot = kdTree.GetRoot();
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| 142 |
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| 143 | mSubdivisionCandidates = new vector<SortableEntry>;
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| 144 | }
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| 145 |
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| 146 |
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| 147 | OspTree::~OspTree()
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| 148 | {
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| 149 | // delete kd intersectables
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| 150 | KdIntersectableMap::iterator it, it_end = mKdIntersectables.end();
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| 151 |
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| 152 | for (it = mKdIntersectables.begin(); it != mKdIntersectables.end(); ++ it)
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| 153 | {
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| 154 | DEL_PTR((*it).second);
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| 155 | }
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| 156 |
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| 157 | // if not using kd tree root, delete tree (otherwise mKdTree has to do the job)
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| 158 | if (!mCopyFromKdTree)
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| 159 | DEL_PTR(mRoot);
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| 160 |
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| 161 | DEL_PTR(mSubdivisionCandidates);
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| 162 | mSubdivisionStats.close();
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| 163 | }
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| 164 |
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| 165 |
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| 166 | void OspTree::ReadEnvironment()
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| 167 | {
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| 168 | bool randomize = false;
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| 169 | Environment::GetSingleton()->GetBoolValue("VspTree.Construction.randomize", randomize);
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| 170 | if (randomize)
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| 171 | Randomize(); // initialise random generator for heuristics
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| 172 |
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| 173 | //-- termination criteria for autopartition
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| 174 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.maxDepth", mTermMaxDepth);
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| 175 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.maxLeaves", mTermMaxLeaves);
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| 176 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.minObjects", mTermMinObjects);
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| 177 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.minProbability", mTermMinProbability);
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| 178 |
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| 179 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.missTolerance", mTermMissTolerance);
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| 180 |
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| 181 | //-- max cost ratio for early tree termination
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| 182 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.maxCostRatio", mTermMaxCostRatio);
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| 183 |
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| 184 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.minGlobalCostRatio",
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| 185 | mTermMinGlobalCostRatio);
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| 186 |
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| 187 |
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| 188 | //-- factors for bsp tree split plane heuristics
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| 189 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.ct_div_ci", mCtDivCi);
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| 190 |
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| 191 | //-- partition criteria
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| 192 | Environment::GetSingleton()->GetFloatValue("OspTree.Construction.epsilon", mEpsilon);
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| 193 |
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| 194 | // if only the driving axis is used for axis aligned split
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| 195 | Environment::GetSingleton()->GetBoolValue("OspTree.splitUseOnlyDrivingAxis", mOnlyDrivingAxis);
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| 196 | Environment::GetSingleton()->GetFloatValue("OspTree.maxStaticMemory", mMaxMemory);
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| 197 | Environment::GetSingleton()->GetBoolValue("OspTree.useCostHeuristics", mUseCostHeuristics);
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| 198 |
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| 199 |
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| 200 | char subdivisionStatsLog[100];
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| 201 | Environment::GetSingleton()->GetStringValue("OspTree.subdivisionStats", subdivisionStatsLog);
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| 202 | mSubdivisionStats.open(subdivisionStatsLog);
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| 203 |
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| 204 | Environment::GetSingleton()->GetFloatValue("OspTree.Construction.splitBorder", mSplitBorder);
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[1288] | 205 | Environment::GetSingleton()->GetFloatValue(
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| 206 | "OspTree.Construction.renderCostDecreaseWeight", mRenderCostDecreaseWeight);
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[1237] | 207 |
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| 208 |
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| 209 | //-- debug output
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| 210 |
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| 211 | Debug << "******* OSP tree options ******** " << endl;
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| 212 |
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| 213 | Debug << "max depth: " << mTermMaxDepth << endl;
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| 214 | Debug << "min probabiliy: " << mTermMinProbability << endl;
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| 215 | Debug << "min objects: " << mTermMinObjects << endl;
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| 216 | Debug << "max cost ratio: " << mTermMaxCostRatio << endl;
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| 217 | Debug << "miss tolerance: " << mTermMissTolerance << endl;
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| 218 | Debug << "max leaves: " << mTermMaxLeaves << endl;
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| 219 |
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| 220 | Debug << "randomize: " << randomize << endl;
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| 221 |
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| 222 | Debug << "min global cost ratio: " << mTermMinGlobalCostRatio << endl;
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| 223 | Debug << "global cost miss tolerance: " << mTermGlobalCostMissTolerance << endl;
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| 224 | Debug << "only driving axis: " << mOnlyDrivingAxis << endl;
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| 225 | Debug << "max memory: " << mMaxMemory << endl;
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| 226 | Debug << "use cost heuristics: " << mUseCostHeuristics << endl;
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| 227 | Debug << "subdivision stats log: " << subdivisionStatsLog << endl;
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| 228 |
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| 229 | Debug << "split borders: " << mSplitBorder << endl;
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| 230 | Debug << "render cost decrease weight: " << mRenderCostDecreaseWeight << endl;
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| 231 | Debug << endl;
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| 232 | }
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| 233 |
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| 234 |
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| 235 | void OspTree::SplitObjects(KdLeaf *parent,
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| 236 | const AxisAlignedPlane& splitPlane,
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| 237 | const ObjectContainer &objects,
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| 238 | ObjectContainer &front,
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| 239 | ObjectContainer &back)
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| 240 | {
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| 241 | ObjectContainer::const_iterator oit, oit_end = objects.end();
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| 242 |
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| 243 | for (oit = objects.begin(); oit != oit_end; ++ oit)
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| 244 | {
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| 245 | Intersectable *object = *oit;
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| 246 |
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| 247 | // initialise leaf references of objects
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| 248 | if (parent->IsRoot())
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| 249 | {
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| 250 | object->mReferences = 1;
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| 251 | }
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| 252 |
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| 253 | // remove parent ref
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| 254 | -- object->mReferences;
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| 255 |
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| 256 | // determine the side of this ray with respect to the plane
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| 257 | const AxisAlignedBox3 box = object->GetBox();
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| 258 |
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| 259 | if (box.Max(splitPlane.mAxis) >= splitPlane.mPosition)
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| 260 | {
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| 261 | front.push_back(object);
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| 262 | ++ object->mReferences;
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| 263 | }
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| 264 |
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| 265 | if (box.Min(splitPlane.mAxis) < splitPlane.mPosition)
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| 266 | {
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| 267 | back.push_back(object);
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| 268 | ++ object->mReferences;
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| 269 | }
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| 270 | }
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| 271 |
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| 272 | mOspStats.objectRefs -= (int)objects.size();
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| 273 | mOspStats.objectRefs += (int)(back.size() + front.size());
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| 274 | }
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| 275 |
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| 276 |
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| 277 | KdInterior *OspTree::SubdivideNode(
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| 278 | const AxisAlignedPlane &splitPlane,
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| 279 | const OspTraversalData &tData,
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| 280 | OspTraversalData &frontData,
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| 281 | OspTraversalData &backData
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| 282 | )
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| 283 | {
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| 284 | KdLeaf *leaf = tData.mNode;
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| 285 |
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| 286 | // two new leaves
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| 287 | mOspStats.nodes += 2;
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| 288 |
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| 289 | // add the new nodes to the tree
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| 290 | KdInterior *node = new KdInterior(leaf->mParent);
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| 291 |
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| 292 | const int axis = splitPlane.mAxis;
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| 293 | const float position = splitPlane.mPosition;
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| 294 |
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| 295 | node->mAxis = axis;
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| 296 | node->mPosition = position;
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| 297 | node->mBox = tData.mBoundingBox;
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| 298 |
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| 299 |
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| 300 | //-- the front and back traversal data is filled with the new values
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| 301 |
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| 302 | // bounding boxes: split front and back node geometry
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| 303 | tData.mBoundingBox.Split(splitPlane.mAxis, splitPlane.mPosition,
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| 304 | frontData.mBoundingBox, backData.mBoundingBox);
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| 305 |
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| 306 | frontData.mDepth = backData.mDepth = tData.mDepth + 1;
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| 307 |
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| 308 | //-- subdivide rays
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| 309 | frontData.mRays = new RayInfoContainer();
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| 310 | backData.mRays = new RayInfoContainer();
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| 311 |
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| 312 | /* SplitRays(splitPlane,
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| 313 | *tData.mRays,
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| 314 | *frontData.mRays,
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| 315 | *backData.mRays);
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| 316 | */
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| 317 |
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| 318 | //-- classify objects
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| 319 |
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| 320 | int objectsBack = 0;
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| 321 | int objectsFront = 0;
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| 322 |
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| 323 | ObjectContainer::const_iterator mi, mi_end = leaf->mObjects.end();
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| 324 |
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| 325 | for ( mi = leaf->mObjects.begin(); mi != mi_end; ++ mi)
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| 326 | {
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| 327 | // determine the side of this ray with respect to the plane
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| 328 | const AxisAlignedBox3 box = (*mi)->GetBox();
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| 329 |
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| 330 | if (box.Max(axis) >= position)
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| 331 | ++ objectsFront;
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| 332 |
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| 333 | if (box.Min(axis) < position)
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| 334 | ++ objectsBack;
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| 335 | }
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| 336 |
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| 337 |
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| 338 | // TODO matt: compute pvs
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| 339 | //frontData.mPvs = objectsFront;
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| 340 | //backData.mPvs = objectsBack;
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| 341 |
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| 342 | //CheckViewCellsPvs(leaf, *tData.mRays);
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| 343 | RemoveParentViewCellsPvs(leaf, *tData.mRays);
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| 344 |
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| 345 |
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| 346 | /////////////
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| 347 | //-- create front and back leaf
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| 348 |
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| 349 | KdLeaf *back = new KdLeaf(node, objectsBack);
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| 350 | KdLeaf *front = new KdLeaf(node, objectsFront);
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| 351 |
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| 352 | KdInterior *parent = leaf->mParent;
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| 353 |
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| 354 | // replace a link from node's parent
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| 355 | if (parent)
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| 356 | {
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| 357 | parent->ReplaceChildLink(leaf, node);
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| 358 | node->mParent = parent;
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| 359 | }
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| 360 | else // new root
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| 361 | {
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| 362 | mRoot = node;
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| 363 | }
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| 364 |
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| 365 | // and setup child links
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| 366 | node->SetupChildLinks(back, front);
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| 367 |
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| 368 | SplitObjects(leaf, splitPlane, leaf->mObjects, front->mObjects, back->mObjects);
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| 369 |
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| 370 | FilterRays(front, *tData.mRays, *frontData.mRays);
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| 371 | FilterRays(back, *tData.mRays, *backData.mRays);
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| 372 |
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| 373 | ++ mOspStats.splits[splitPlane.mAxis];
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| 374 |
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| 375 | //-- eval view cells pvs
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| 376 |
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| 377 | // remove parent pvs update pvs of left and right leaves
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| 378 | // Note: It is necessary to update first left and then right pvs.
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| 379 | // We need to store the view cells seen by each object,
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| 380 | // but also if the view cells are seen as part of two different
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| 381 | // kd leaves, which is stored in the pdf component of the pvs entry.
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| 382 | // Because if an object is part of a view cell more than once,
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| 383 | // it cannot be removed from the pvs by splitting a kd node where
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| 384 | // the view cell sees only the other child of the node.
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| 385 | // This is important during the subdivision
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| 386 |
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| 387 | //MailablePvsData::NewMail();
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| 388 | UpdateViewCellsPvs(front, *frontData.mRays);
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| 389 | UpdateViewCellsPvs(back, *backData.mRays);
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| 390 |
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| 391 | ////////////////////////////////////
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| 392 |
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| 393 |
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| 394 | ProcessMultipleRefs(front);
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| 395 | ProcessMultipleRefs(back);
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| 396 |
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| 397 | frontData.mNode = front;
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| 398 | backData.mNode = back;
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| 399 |
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| 400 | // compute probability, i.e., volume of seen view cells
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| 401 | frontData.mProbability = EvalViewCellsVolume(front, *frontData.mRays);
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| 402 | backData.mProbability = EvalViewCellsVolume(back, *backData.mRays);
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| 403 |
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| 404 | //delete leaf;
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| 405 | return node;
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| 406 | }
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| 407 |
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| 408 |
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| 409 | KdNode *OspTree::Subdivide(SplitQueue &tQueue,
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| 410 | SubdivisionCandidate *splitCandidate,
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| 411 | const bool globalCriteriaMet)
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| 412 | {
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| 413 | OspSubdivisionCandidate *sc = dynamic_cast<OspSubdivisionCandidate *>(splitCandidate);
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| 414 | OspTraversalData &tData = sc->mParentData;
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| 415 |
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| 416 | KdNode *newNode = tData.mNode;
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| 417 |
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| 418 | if (!LocalTerminationCriteriaMet(tData) && !globalCriteriaMet)
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| 419 | {
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| 420 | OspTraversalData tFrontData;
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| 421 | OspTraversalData tBackData;
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| 422 |
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| 423 | //-- continue subdivision
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| 424 |
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| 425 | // create new interior node and two leaf node
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| 426 | const AxisAlignedPlane splitPlane = sc->mSplitPlane;
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| 427 |
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| 428 | newNode = SubdivideNode(splitPlane,
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| 429 | tData,
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| 430 | tFrontData,
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| 431 | tBackData);
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| 432 |
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| 433 | const int maxCostMisses = sc->mMaxCostMisses;
|
---|
| 434 |
|
---|
| 435 | // how often was max cost ratio missed in this branch?
|
---|
| 436 | tFrontData.mMaxCostMisses = maxCostMisses;
|
---|
| 437 | tBackData.mMaxCostMisses = maxCostMisses;
|
---|
| 438 |
|
---|
| 439 | mTotalCost -= sc->GetRenderCostDecrease();
|
---|
| 440 |
|
---|
| 441 | // subdivision statistics
|
---|
| 442 | if (1) EvalSubdivisionStats(*sc);
|
---|
| 443 |
|
---|
| 444 | //-- push the new split candidates on the queue
|
---|
| 445 |
|
---|
| 446 | OspSubdivisionCandidate *frontCandidate = new OspSubdivisionCandidate(tFrontData);
|
---|
| 447 | OspSubdivisionCandidate *backCandidate = new OspSubdivisionCandidate(tBackData);
|
---|
| 448 |
|
---|
| 449 | EvalSubdivisionCandidate(*frontCandidate);
|
---|
| 450 | EvalSubdivisionCandidate(*backCandidate);
|
---|
| 451 |
|
---|
| 452 | tQueue.Push(frontCandidate);
|
---|
| 453 | tQueue.Push(backCandidate);
|
---|
| 454 |
|
---|
| 455 | // delete old leaf node
|
---|
| 456 | DEL_PTR(tData.mNode);
|
---|
| 457 | }
|
---|
| 458 |
|
---|
| 459 |
|
---|
| 460 | //-- terminate traversal
|
---|
| 461 | if (newNode->IsLeaf())
|
---|
| 462 | {
|
---|
| 463 | EvaluateLeafStats(tData);
|
---|
| 464 |
|
---|
| 465 | const bool mStoreRays= true;
|
---|
| 466 |
|
---|
| 467 | //-- store additional info
|
---|
| 468 | if (mStoreRays)
|
---|
| 469 | {
|
---|
| 470 | KdLeaf *leaf = dynamic_cast<KdLeaf *>(newNode);
|
---|
| 471 |
|
---|
| 472 | RayInfoContainer::const_iterator it, it_end = tData.mRays->end();
|
---|
| 473 |
|
---|
| 474 | for (it = tData.mRays->begin(); it != it_end; ++ it)
|
---|
| 475 | {
|
---|
| 476 | (*it).mRay->Ref();
|
---|
| 477 | leaf->mVssRays.push_back((*it).mRay);
|
---|
| 478 | }
|
---|
| 479 | }
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 | //-- cleanup
|
---|
| 483 | tData.Clear();
|
---|
| 484 |
|
---|
| 485 | return newNode;
|
---|
| 486 | }
|
---|
| 487 |
|
---|
| 488 |
|
---|
| 489 | void OspTree::EvalSubdivisionCandidate(OspSubdivisionCandidate &splitCandidate)
|
---|
| 490 | {
|
---|
| 491 | // compute locally best split plane
|
---|
| 492 | const float ratio = SelectSplitPlane(splitCandidate.mParentData,
|
---|
[1251] | 493 | splitCandidate.mSplitPlane);
|
---|
[1237] | 494 |
|
---|
| 495 | const bool success = ratio < mTermMaxCostRatio;
|
---|
| 496 | float oldRenderCost;
|
---|
| 497 |
|
---|
| 498 | // compute global decrease in render cost
|
---|
| 499 | const float renderCostDecr = EvalRenderCostDecrease(splitCandidate.mSplitPlane,
|
---|
| 500 | splitCandidate.mParentData,
|
---|
| 501 | oldRenderCost);
|
---|
| 502 |
|
---|
| 503 | splitCandidate.SetRenderCostDecrease(renderCostDecr);
|
---|
| 504 |
|
---|
| 505 | #if 0
|
---|
| 506 | const float priority = (float)-data.mDepth;
|
---|
| 507 | #else
|
---|
| 508 | // take render cost of node into account
|
---|
| 509 | // otherwise danger of being stuck in a local minimum!!
|
---|
| 510 | const float factor = mRenderCostDecreaseWeight;
|
---|
| 511 | const float priority = factor * renderCostDecr + (1.0f - factor) * oldRenderCost;
|
---|
| 512 |
|
---|
| 513 | #endif
|
---|
| 514 |
|
---|
| 515 | // compute global decrease in render cost
|
---|
| 516 | splitCandidate.SetPriority(priority);
|
---|
| 517 |
|
---|
| 518 | splitCandidate.mMaxCostMisses =
|
---|
| 519 | success ? splitCandidate.mParentData.mMaxCostMisses :
|
---|
| 520 | splitCandidate.mParentData.mMaxCostMisses + 1;
|
---|
| 521 | }
|
---|
| 522 |
|
---|
| 523 |
|
---|
[1251] | 524 | inline bool OspTree::LocalTerminationCriteriaMet(const OspTraversalData &data) const
|
---|
[1237] | 525 | {
|
---|
| 526 | // matt: TODO
|
---|
| 527 | return (
|
---|
| 528 | //(data.mNode->mObjects.size() < mTermMinObjects) ||
|
---|
| 529 | //(data.mProbability <= mTermMinProbability) ||
|
---|
| 530 | (data.mDepth >= mTermMaxDepth)
|
---|
| 531 | );
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 |
|
---|
[1251] | 535 | inline bool OspTree::GlobalTerminationCriteriaMet(const OspTraversalData &data) const
|
---|
[1237] | 536 | {
|
---|
| 537 | // matt: TODO
|
---|
| 538 | return (
|
---|
| 539 | (mOspStats.Leaves() >= mTermMaxLeaves)
|
---|
| 540 | //mOutOfMemory ||
|
---|
| 541 | //(mGlobalCostMisses >= mTermGlobalCostMissTolerance)
|
---|
| 542 | );
|
---|
| 543 | }
|
---|
| 544 |
|
---|
| 545 |
|
---|
| 546 | void OspTree::EvaluateLeafStats(const OspTraversalData &data)
|
---|
| 547 | {
|
---|
| 548 | // the node became a leaf -> evaluate stats for leafs
|
---|
| 549 | KdLeaf *leaf = data.mNode;
|
---|
| 550 |
|
---|
| 551 | ++ mCreatedLeaves;
|
---|
| 552 |
|
---|
| 553 | /*if (data.mPvs > mOspStats.maxPvs)
|
---|
| 554 | {
|
---|
| 555 | mOspStats.maxPvs = data.mPvs;
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | mOspStats.pvs += data.mPvs;
|
---|
| 559 |
|
---|
| 560 | if (data.mDepth < mOspStats.minDepth)
|
---|
| 561 | {
|
---|
| 562 | mOspStats.minDepth = data.mDepth;
|
---|
| 563 | }*/
|
---|
| 564 |
|
---|
| 565 | if (data.mDepth >= mTermMaxDepth)
|
---|
| 566 | {
|
---|
| 567 | ++ mOspStats.maxDepthNodes;
|
---|
| 568 | //Debug << "new max depth: " << mVspStats.maxDepthNodes << endl;
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | if (data.mProbability <= mTermMinProbability)
|
---|
| 572 | ++ mOspStats.minProbabilityNodes;
|
---|
| 573 |
|
---|
| 574 | // accumulate depth to compute average depth
|
---|
| 575 | mOspStats.accumDepth += data.mDepth;
|
---|
| 576 |
|
---|
| 577 | // if ((int)(leaf->mObjects.size()) < mTermMinCost)
|
---|
| 578 | // ++ mOspStats.minCostNodes;
|
---|
| 579 |
|
---|
| 580 | if ((int)(leaf->mObjects.size()) > mOspStats.maxObjectRefs)
|
---|
| 581 | mOspStats.maxObjectRefs = (int)leaf->mObjects.size();
|
---|
| 582 |
|
---|
| 583 | #ifdef _DEBUG
|
---|
| 584 | Debug << "BSP stats: "
|
---|
| 585 | << "Depth: " << data.mDepth << " (max: " << mTermMaxDepth << "), "
|
---|
| 586 | << "Prob: " << data.mProbability << " (min: " << mTermMinProbability << ")\n";
|
---|
| 587 | #endif
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 |
|
---|
| 591 | float OspTree::EvalLocalCostHeuristics(const OspTraversalData &tData,
|
---|
| 592 | const AxisAlignedBox3 &box,
|
---|
| 593 | const int axis,
|
---|
| 594 | float &position,
|
---|
| 595 | int &objectsFront,
|
---|
| 596 | int &objectsBack)
|
---|
| 597 | {
|
---|
| 598 | RayInfoContainer usedRays;
|
---|
| 599 | int mMaxTests = 500000; // HACK
|
---|
| 600 |
|
---|
| 601 | if (mMaxTests < (int)tData.mRays->size())
|
---|
| 602 | {
|
---|
| 603 | GetRayInfoSets(*tData.mRays, mMaxTests, usedRays);
|
---|
| 604 | }
|
---|
| 605 | else
|
---|
| 606 | {
|
---|
| 607 | usedRays = *tData.mRays;
|
---|
| 608 | }
|
---|
| 609 |
|
---|
| 610 | // go through the lists, count the number of objects left and right
|
---|
| 611 | // and evaluate the following cost funcion:
|
---|
| 612 | // C = ct_div_ci + (ol + or)/queries
|
---|
| 613 |
|
---|
| 614 | const float minBox = box.Min(axis);
|
---|
| 615 | const float maxBox = box.Max(axis);
|
---|
| 616 | Debug << "min: " << minBox << " max: " << maxBox << endl;
|
---|
| 617 |
|
---|
| 618 | const float sizeBox = maxBox - minBox;
|
---|
| 619 |
|
---|
| 620 | float minBand = minBox + mSplitBorder * (maxBox - minBox);
|
---|
| 621 | float maxBand = minBox + (1.0f - mSplitBorder) * (maxBox - minBox);
|
---|
| 622 |
|
---|
| 623 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
| 624 |
|
---|
| 625 | //-- sort so we can use a sweep
|
---|
| 626 | SortSubdivisionCandidates(tData, axis, minBand, maxBand);
|
---|
| 627 |
|
---|
| 628 | float totalVol = 0;
|
---|
| 629 | float voll = 0;
|
---|
| 630 | float volr = totalVol;
|
---|
| 631 |
|
---|
| 632 | ViewCellContainer touchedViewCells;
|
---|
| 633 |
|
---|
| 634 | const float totalRenderCost = PrepareHeuristics(tData, touchedViewCells);
|
---|
| 635 | float renderCost = totalRenderCost;
|
---|
| 636 |
|
---|
| 637 | /// this is kind of a reverse pvs
|
---|
| 638 | const int totalPvs = (int)tData.mNode->mObjects.size();
|
---|
| 639 |
|
---|
| 640 | int pvsl = 0;
|
---|
| 641 | int pvsr = totalPvs;
|
---|
| 642 |
|
---|
| 643 | float sum = (float)totalVol * sizeBox;
|
---|
| 644 |
|
---|
[1297] | 645 | Debug << "total render cost: " << renderCost / viewSpaceVol << endl;
|
---|
[1237] | 646 |
|
---|
| 647 | /////////////////////////////////
|
---|
| 648 |
|
---|
| 649 | // note: initialised to take mid split
|
---|
| 650 | // if no good split can be found,
|
---|
| 651 | position = minBox + 0.5f * sizeBox;
|
---|
| 652 |
|
---|
| 653 | // the relative cost ratio
|
---|
| 654 | float ratio = 99999999.0f;
|
---|
| 655 | bool splitPlaneFound = false;
|
---|
| 656 |
|
---|
| 657 | float volBack = voll;
|
---|
| 658 | float volFront = volr;
|
---|
| 659 |
|
---|
| 660 | int pvsBack = pvsl;
|
---|
| 661 | int pvsFront = pvsr;
|
---|
| 662 |
|
---|
| 663 | float minRenderCost = 1e20f;
|
---|
| 664 |
|
---|
| 665 | debugVol = 0;
|
---|
| 666 |
|
---|
| 667 |
|
---|
| 668 |
|
---|
| 669 | /////////////////////////////
|
---|
| 670 | // the sweep heuristics
|
---|
| 671 |
|
---|
| 672 |
|
---|
| 673 | //-- traverse through events and find best split plane
|
---|
| 674 |
|
---|
| 675 | vector<SortableEntry>::const_iterator ci, ci_end = mSubdivisionCandidates->end();
|
---|
| 676 | //minRenderCost = RandomValue(0,viewSpaceVol);
|
---|
| 677 |
|
---|
| 678 | for (ci = mSubdivisionCandidates->begin(); ci != ci_end; ++ ci)
|
---|
| 679 | {
|
---|
| 680 | Intersectable *object = (*ci).mObject;
|
---|
| 681 |
|
---|
| 682 | EvalHeuristicsContribution(tData.mNode,
|
---|
| 683 | *ci,
|
---|
| 684 | renderCost,
|
---|
| 685 | touchedViewCells
|
---|
| 686 | );
|
---|
| 687 |
|
---|
| 688 | // Note: sufficient to compare size of bounding boxes of front and back side?
|
---|
| 689 | if (((*ci).mPos >= minBand) && ((*ci).mPos <= maxBand))
|
---|
| 690 | {
|
---|
| 691 | float currentPos;
|
---|
[1297] | 692 | Debug << "current min: " << minRenderCost / viewSpaceVol << endl;
|
---|
[1237] | 693 |
|
---|
| 694 | // HACK: current positition is BETWEEN visibility events
|
---|
| 695 | if (1 && /*((*ci).mType == SortableEntry::BOX_INTERSECT) &&*/ ((ci + 1) != ci_end))
|
---|
| 696 | currentPos = ((*ci).mPos + (*(ci + 1)).mPos) * 0.5f;
|
---|
| 697 | else
|
---|
| 698 | currentPos = (*ci).mPos;
|
---|
| 699 |
|
---|
| 700 | if (renderCost < minRenderCost)
|
---|
| 701 | {
|
---|
| 702 | splitPlaneFound = true;
|
---|
| 703 | minRenderCost = renderCost;
|
---|
| 704 | position = currentPos;
|
---|
| 705 | Debug << "pos: " << position << endl;
|
---|
| 706 | }
|
---|
| 707 | }
|
---|
| 708 | }
|
---|
| 709 | //splitPlaneFound = true;
|
---|
| 710 | if (splitPlaneFound)
|
---|
| 711 | {
|
---|
| 712 | ratio = minRenderCost / totalRenderCost;
|
---|
| 713 | }
|
---|
| 714 |
|
---|
| 715 | Debug << "\n§§§§ eval local cost §§§§" << endl
|
---|
| 716 | << "old rc: " << totalRenderCost / viewSpaceVol << " new rc: " << minRenderCost / viewSpaceVol << endl
|
---|
| 717 | << "render cost decrease: " << (totalRenderCost - minRenderCost) / viewSpaceVol << endl;
|
---|
| 718 |
|
---|
| 719 | return ratio;
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 |
|
---|
| 723 | void OspTree::SortSubdivisionCandidates(const OspTraversalData &tData,
|
---|
| 724 | const int axis,
|
---|
| 725 | float minBand,
|
---|
| 726 | float maxBand)
|
---|
| 727 |
|
---|
| 728 | {
|
---|
| 729 | mSubdivisionCandidates->clear();
|
---|
| 730 |
|
---|
| 731 | RayInfoContainer *rays = tData.mRays;
|
---|
| 732 | KdLeaf *leaf = tData.mNode;
|
---|
| 733 |
|
---|
| 734 | int requestedSize = 2 * (int)rays->size() + 2 * (int)leaf->mObjects.size();
|
---|
| 735 |
|
---|
| 736 | // creates a sorted split candidates array
|
---|
| 737 | if (mSubdivisionCandidates->capacity() > 500000 &&
|
---|
| 738 | requestedSize < (int)(mSubdivisionCandidates->capacity() / 10) )
|
---|
| 739 | {
|
---|
| 740 | delete mSubdivisionCandidates;
|
---|
| 741 | mSubdivisionCandidates = new vector<SortableEntry>;
|
---|
| 742 | }
|
---|
| 743 |
|
---|
| 744 | mSubdivisionCandidates->reserve(requestedSize);
|
---|
| 745 |
|
---|
| 746 | float pos;
|
---|
| 747 |
|
---|
| 748 | //-- insert ray queries
|
---|
| 749 | //-- we are intersested only in rays which intersect an object that
|
---|
| 750 | //-- is part of the kd node because they can induce a change in view cell
|
---|
| 751 | //-- volume on the left and the right part.
|
---|
| 752 | //-- Note that they cannot induce a change in pvs size!!
|
---|
| 753 |
|
---|
| 754 | RayInfoContainer::const_iterator rit, rit_end = rays->end();
|
---|
| 755 |
|
---|
| 756 | for (rit = rays->begin(); rit < rit_end; ++ rit)
|
---|
| 757 | {
|
---|
| 758 | VssRay *ray = (*rit).mRay;
|
---|
| 759 |
|
---|
| 760 | const bool positive = ray->HasPosDir(axis);
|
---|
| 761 |
|
---|
| 762 | if (EndPointInsideNode(leaf, *ray, true))
|
---|
| 763 | {
|
---|
| 764 | pos = ray->mTermination[axis];
|
---|
| 765 |
|
---|
| 766 | mSubdivisionCandidates->push_back(
|
---|
| 767 | SortableEntry(SortableEntry::BOX_INTERSECT,
|
---|
| 768 | pos,
|
---|
| 769 | ray->mTerminationObject,
|
---|
| 770 | ray)
|
---|
| 771 | );
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 | // if hitpoint with object is inside this node
|
---|
| 775 | if (EndPointInsideNode(leaf, *ray, false))
|
---|
| 776 | {
|
---|
| 777 | pos = ray->mOrigin[axis];
|
---|
| 778 |
|
---|
| 779 | mSubdivisionCandidates->push_back(
|
---|
| 780 | SortableEntry(SortableEntry::BOX_INTERSECT,
|
---|
| 781 | pos,
|
---|
| 782 | ray->mOriginObject,
|
---|
| 783 | ray)
|
---|
| 784 | );
|
---|
| 785 | }
|
---|
| 786 | }
|
---|
| 787 |
|
---|
| 788 |
|
---|
| 789 | //-- insert object queries
|
---|
| 790 | //-- These queries can induce a change in pvs size.
|
---|
| 791 | //-- Note that they cannot induce a change in view cell volume, as
|
---|
| 792 | //-- there is no ray associated with these events!!
|
---|
| 793 |
|
---|
| 794 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 795 |
|
---|
| 796 | for (oit = leaf->mObjects.begin(); oit != leaf->mObjects.end(); ++ oit )
|
---|
| 797 | {
|
---|
| 798 | Intersectable *object = *oit;
|
---|
| 799 | const AxisAlignedBox3 box = object->GetBox();
|
---|
| 800 |
|
---|
| 801 | mSubdivisionCandidates->push_back(
|
---|
| 802 | SortableEntry(SortableEntry::BOX_MIN,
|
---|
| 803 | box.Min(axis),
|
---|
| 804 | object,
|
---|
| 805 | NULL)
|
---|
| 806 | );
|
---|
| 807 |
|
---|
| 808 |
|
---|
| 809 | mSubdivisionCandidates->push_back(
|
---|
| 810 | SortableEntry(SortableEntry::BOX_MAX,
|
---|
| 811 | box.Max(axis),
|
---|
| 812 | object,
|
---|
| 813 | NULL)
|
---|
| 814 | );
|
---|
| 815 | }
|
---|
| 816 |
|
---|
| 817 | stable_sort(mSubdivisionCandidates->begin(), mSubdivisionCandidates->end());
|
---|
| 818 | }
|
---|
| 819 |
|
---|
| 820 |
|
---|
| 821 | const OspTreeStatistics &OspTree::GetStatistics() const
|
---|
| 822 | {
|
---|
| 823 | return mOspStats;
|
---|
| 824 | }
|
---|
| 825 |
|
---|
| 826 |
|
---|
| 827 | void OspTree::PrepareHeuristics(const VssRay &ray,
|
---|
| 828 | ViewCellContainer &touchedViewCells)
|
---|
| 829 | {
|
---|
| 830 | // collect view cells and set mail + counter
|
---|
| 831 | ViewCellContainer viewCells;
|
---|
| 832 | mVspTree->GetViewCells(ray, viewCells);
|
---|
| 833 |
|
---|
| 834 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 835 |
|
---|
| 836 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 837 | {
|
---|
| 838 | ViewCell *vc = (*vit);
|
---|
| 839 |
|
---|
| 840 | if (!vc->Mailed())
|
---|
| 841 | {
|
---|
| 842 | vc->Mail(); // set as belonging to front leaf
|
---|
| 843 | vc->mCounter = 0;
|
---|
| 844 | touchedViewCells.push_back(vc);
|
---|
| 845 | }
|
---|
| 846 |
|
---|
| 847 | // view cell volume already added => just increase counter
|
---|
| 848 | ++ vc->mCounter;
|
---|
| 849 | }
|
---|
| 850 | }
|
---|
| 851 |
|
---|
| 852 |
|
---|
| 853 | float OspTree::PrepareHeuristics(const OspTraversalData &tData,
|
---|
| 854 | ViewCellContainer &touchedViewCells)
|
---|
| 855 | {
|
---|
| 856 | float renderCost = 0;
|
---|
| 857 |
|
---|
| 858 | Intersectable::NewMail(3);
|
---|
| 859 | ViewCell::NewMail(3);
|
---|
| 860 | MailablePvsData::NewMail();
|
---|
| 861 |
|
---|
| 862 | KdLeaf *leaf = tData.mNode;
|
---|
| 863 |
|
---|
| 864 | RayInfoContainer::const_iterator rit, rit_end = tData.mRays->end();
|
---|
| 865 |
|
---|
| 866 | for (rit = tData.mRays->begin(); rit < rit_end; ++ rit)
|
---|
| 867 | {
|
---|
| 868 | VssRay *ray = (*rit).mRay;
|
---|
| 869 | PrepareHeuristics(*ray, touchedViewCells);
|
---|
| 870 | }
|
---|
| 871 |
|
---|
| 872 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 873 |
|
---|
| 874 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 875 | {
|
---|
| 876 | Intersectable *obj = *oit;
|
---|
| 877 | obj->Mail(); // set as belonging to front leaf
|
---|
| 878 |
|
---|
| 879 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 880 |
|
---|
| 881 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 882 | {
|
---|
| 883 | ViewCell *vc = *vit;
|
---|
| 884 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
| 885 |
|
---|
| 886 | if (!vdata) // should never happen
|
---|
| 887 | continue;
|
---|
| 888 |
|
---|
| 889 | if (!vdata->Mailed())
|
---|
| 890 | {
|
---|
| 891 | vdata->Mail();
|
---|
| 892 | renderCost += vc->GetVolume();
|
---|
| 893 | }
|
---|
| 894 | }
|
---|
| 895 | }
|
---|
| 896 |
|
---|
| 897 | return renderCost;
|
---|
| 898 | }
|
---|
| 899 |
|
---|
| 900 |
|
---|
| 901 | void OspTree::AddObjectContribution(KdLeaf *leaf,
|
---|
| 902 | Intersectable *obj,
|
---|
| 903 | ViewCellContainer &touchedViewCells,
|
---|
| 904 | float &renderCost)
|
---|
| 905 | {
|
---|
| 906 | //Debug << "add contri to obj: " << obj->mMailbox - Intersectable::sMailId << endl;
|
---|
| 907 | obj->Mail(2); // set as belonging to both leafs
|
---|
| 908 |
|
---|
| 909 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 910 |
|
---|
| 911 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 912 | {
|
---|
| 913 | ViewCell *vc = *vit;
|
---|
[1251] | 914 |
|
---|
[1237] | 915 | // if obj not previously associated with this view cell => increase render cost
|
---|
| 916 | if (vc->Mailed(1) && !ViewCellHasMultipleReferences(obj, vc, false))
|
---|
| 917 | {
|
---|
| 918 | //Debug << "add to rendercost: " << vc->GetVolume() / mVspTree->GetBoundingBox().GetVolume() << endl;
|
---|
| 919 | renderCost += vc->GetVolume();
|
---|
| 920 | }
|
---|
| 921 | }
|
---|
| 922 | }
|
---|
| 923 |
|
---|
| 924 |
|
---|
| 925 | void OspTree::SubtractObjectContribution(KdLeaf *leaf,
|
---|
| 926 | Intersectable * obj,
|
---|
| 927 | ViewCellContainer &touchedViewCells,
|
---|
| 928 | float &renderCost)
|
---|
| 929 | {
|
---|
| 930 | //Debug << "subtract contri from obj: " << obj->mMailbox - Intersectable::sMailId << endl;
|
---|
| 931 | obj->Mail(1); // set as belonging to back leaf
|
---|
| 932 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 933 |
|
---|
| 934 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 935 | {
|
---|
| 936 | ViewCell *vc = *vit;
|
---|
| 937 |
|
---|
| 938 | // if obj was previously associated with this view cell but is not now
|
---|
| 939 | // => decrease render cost
|
---|
| 940 | if (vc->Mailed() && !ViewCellHasMultipleReferences(obj, vc, false))
|
---|
| 941 | {
|
---|
| 942 | //Debug << "subtract from rendercost: " << vc->GetVolume() / mVspTree->GetBoundingBox().GetVolume() << endl;
|
---|
| 943 | renderCost -= vc->GetVolume();
|
---|
| 944 | }
|
---|
| 945 | }
|
---|
| 946 | }
|
---|
| 947 |
|
---|
| 948 |
|
---|
| 949 | void OspTree::EvalRayContribution(KdLeaf *leaf,
|
---|
| 950 | const VssRay &ray,
|
---|
| 951 | float &renderCost)
|
---|
| 952 | {
|
---|
| 953 | ViewCellContainer viewCells;
|
---|
| 954 |
|
---|
| 955 | mVspTree->GetViewCells(ray, viewCells);
|
---|
| 956 |
|
---|
| 957 | // classify view cells and compute volume contri accordingly
|
---|
| 958 | // possible view cell classifications:
|
---|
| 959 | // view cell mailed => view cell can be seen from left child node
|
---|
| 960 | // view cell counter > 0 view cell can be seen from right child node
|
---|
| 961 | // combined: view cell volume belongs to both nodes
|
---|
| 962 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 963 |
|
---|
| 964 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 965 | {
|
---|
| 966 | EvalViewCellContribution(leaf, *vit, renderCost);
|
---|
| 967 | }
|
---|
| 968 | }
|
---|
| 969 |
|
---|
| 970 |
|
---|
| 971 | void OspTree::EvalViewCellContribution(KdLeaf *leaf,
|
---|
| 972 | ViewCell *viewCell,
|
---|
| 973 | float &renderCost)
|
---|
| 974 | {
|
---|
| 975 | //Debug << "**************" << endl;
|
---|
| 976 | //Debug << "vc contri: " << renderCost / mVspTree->GetBoundingBox().GetVolume() << " " << viewCell->mMailbox - ViewCell::sMailId << " counter: " << viewCell->mCounter << endl;
|
---|
| 977 |
|
---|
| 978 | const float vol = viewCell->GetVolume();
|
---|
| 979 |
|
---|
| 980 | if (viewCell->Mailed())
|
---|
| 981 | {
|
---|
| 982 | viewCell->Mail(2); // view cell can be seen from both nodes
|
---|
| 983 |
|
---|
| 984 | // we now see view cell from both nodes => add contri
|
---|
| 985 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 986 |
|
---|
| 987 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 988 | {
|
---|
| 989 | Intersectable *obj = *oit;
|
---|
| 990 |
|
---|
| 991 | // was render cost already added?
|
---|
| 992 | if (!ViewCellHasMultipleReferences(obj, viewCell, false) &&
|
---|
| 993 | obj->Mailed(1))
|
---|
| 994 | {
|
---|
| 995 | //Debug << "obj mail 1!! " << vol / mVspTree->GetBoundingBox().GetVolume() << endl;
|
---|
| 996 | renderCost += vol;
|
---|
| 997 | }
|
---|
| 998 | }
|
---|
| 999 | }
|
---|
| 1000 |
|
---|
| 1001 | if (-- viewCell->mCounter == 0)
|
---|
| 1002 | {
|
---|
| 1003 | viewCell->Mail(1); // view cell can be seen from back node only
|
---|
| 1004 |
|
---|
| 1005 | //MailablePvsData::NewMail();
|
---|
| 1006 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1007 |
|
---|
| 1008 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1009 | {
|
---|
| 1010 | Intersectable *obj = *oit;
|
---|
| 1011 |
|
---|
| 1012 | // can render cost be be reduced?
|
---|
| 1013 | if (!ViewCellHasMultipleReferences(obj, viewCell, false) && obj->Mailed())
|
---|
| 1014 | {
|
---|
| 1015 | renderCost -= vol;
|
---|
| 1016 | }
|
---|
| 1017 | }
|
---|
| 1018 | }
|
---|
| 1019 | //Debug << "new rc: " << renderCost / mVspTree->GetBoundingBox().GetVolume() << " counter2: " << viewCell->mCounter << endl;
|
---|
| 1020 | //Debug << "**************"<<endl;
|
---|
| 1021 | }
|
---|
| 1022 |
|
---|
| 1023 |
|
---|
| 1024 | void OspTree::EvalHeuristicsContribution(KdLeaf *leaf,
|
---|
| 1025 | const SortableEntry &ci,
|
---|
| 1026 | float &renderCost,
|
---|
| 1027 | ViewCellContainer &touchedViewCells)
|
---|
| 1028 | {
|
---|
| 1029 | Intersectable *obj = ci.mObject;
|
---|
| 1030 | VssRay *ray = ci.mRay;
|
---|
| 1031 |
|
---|
| 1032 | // switch between different types of events
|
---|
| 1033 | switch (ci.mType)
|
---|
| 1034 | {
|
---|
| 1035 | case SortableEntry::BOX_MIN:
|
---|
| 1036 | cout << "<";
|
---|
| 1037 | AddObjectContribution(leaf, ci.mObject, touchedViewCells, renderCost);
|
---|
| 1038 | break;
|
---|
| 1039 |
|
---|
| 1040 | case SortableEntry::BOX_MAX:
|
---|
| 1041 | cout << ">";
|
---|
| 1042 | SubtractObjectContribution(leaf, ci.mObject, touchedViewCells, renderCost);
|
---|
| 1043 | break;
|
---|
| 1044 |
|
---|
| 1045 | // compute volume contribution from view cells
|
---|
| 1046 | case SortableEntry::BOX_INTERSECT:
|
---|
| 1047 | cout << "i";
|
---|
| 1048 | // process ray if the hit point with termination / origin object
|
---|
| 1049 | // is inside this kd leaf
|
---|
| 1050 | EvalRayContribution(leaf, *ray, renderCost);
|
---|
| 1051 | break;
|
---|
| 1052 |
|
---|
| 1053 | default:
|
---|
| 1054 | cout << "should not come here" << endl;
|
---|
| 1055 | break;
|
---|
| 1056 | }
|
---|
| 1057 |
|
---|
| 1058 | //cout << "vol left: " << volLeft << " vol right " << volRight << endl;
|
---|
| 1059 | }
|
---|
| 1060 |
|
---|
| 1061 |
|
---|
| 1062 | void OspTree::SetViewCellsManager(ViewCellsManager *vcm)
|
---|
| 1063 | {
|
---|
| 1064 | mViewCellsManager = vcm;
|
---|
| 1065 | }
|
---|
| 1066 |
|
---|
| 1067 |
|
---|
| 1068 | AxisAlignedBox3 OspTree::GetBoundingBox() const
|
---|
| 1069 | {
|
---|
| 1070 | return mBoundingBox;
|
---|
| 1071 | }
|
---|
| 1072 |
|
---|
| 1073 |
|
---|
| 1074 | float OspTree::SelectSplitPlane(const OspTraversalData &tData,
|
---|
[1251] | 1075 | AxisAlignedPlane &plane)
|
---|
[1237] | 1076 | {
|
---|
| 1077 | float nPosition[3];
|
---|
| 1078 | float nCostRatio[3];
|
---|
| 1079 |
|
---|
| 1080 | // create bounding box of node geometry
|
---|
| 1081 | AxisAlignedBox3 box = tData.mBoundingBox;
|
---|
| 1082 |
|
---|
| 1083 | int sAxis = 0;
|
---|
| 1084 | int bestAxis = -1;
|
---|
| 1085 |
|
---|
| 1086 | if (mOnlyDrivingAxis)
|
---|
| 1087 | {
|
---|
| 1088 | sAxis = box.Size().DrivingAxis();
|
---|
| 1089 | }
|
---|
| 1090 |
|
---|
| 1091 |
|
---|
| 1092 | // -- evaluate split cost for all three axis
|
---|
| 1093 | for (int axis = 0; axis < 3; ++ axis)
|
---|
| 1094 | {
|
---|
| 1095 | if (!mOnlyDrivingAxis || (axis == sAxis))
|
---|
| 1096 | {
|
---|
| 1097 | if (1 || mUseCostHeuristics)
|
---|
| 1098 | {
|
---|
| 1099 | //-- place split plane using heuristics
|
---|
| 1100 | int objectsFront, objectsBack;
|
---|
| 1101 |
|
---|
| 1102 | nCostRatio[axis] =
|
---|
| 1103 | EvalLocalCostHeuristics(tData,
|
---|
| 1104 | tData.mBoundingBox,
|
---|
| 1105 | axis,
|
---|
| 1106 | nPosition[axis],
|
---|
| 1107 | objectsFront,
|
---|
| 1108 | objectsBack);
|
---|
| 1109 | }
|
---|
| 1110 | /* else
|
---|
| 1111 | {
|
---|
| 1112 | //-- split plane position is spatial median
|
---|
| 1113 |
|
---|
| 1114 | nPosition[axis] = (box.Min()[axis] + box.Max()[axis]) * 0.5f;
|
---|
| 1115 |
|
---|
| 1116 | nCostRatio[axis] = EvalLocalSplitCost(tData,
|
---|
| 1117 | box,
|
---|
| 1118 | axis,
|
---|
| 1119 | nPosition[axis],
|
---|
| 1120 | nProbFront[axis],
|
---|
| 1121 | nProbBack[axis]);
|
---|
| 1122 | }*/
|
---|
| 1123 |
|
---|
| 1124 | if (bestAxis == -1)
|
---|
| 1125 | {
|
---|
| 1126 | bestAxis = axis;
|
---|
| 1127 | }
|
---|
| 1128 | else if (nCostRatio[axis] < nCostRatio[bestAxis])
|
---|
| 1129 | {
|
---|
| 1130 | bestAxis = axis;
|
---|
| 1131 | }
|
---|
| 1132 | }
|
---|
| 1133 | }
|
---|
| 1134 |
|
---|
| 1135 | //-- assign values
|
---|
| 1136 |
|
---|
| 1137 | plane.mAxis = bestAxis;
|
---|
| 1138 | // split plane position
|
---|
| 1139 | plane.mPosition = nPosition[bestAxis];
|
---|
| 1140 |
|
---|
| 1141 | Debug << "val: " << nCostRatio[bestAxis] << " axis: " << bestAxis << endl;
|
---|
| 1142 | return nCostRatio[bestAxis];
|
---|
| 1143 | }
|
---|
| 1144 |
|
---|
| 1145 |
|
---|
| 1146 | bool OspTree::EndPointInsideNode(KdLeaf *leaf,
|
---|
| 1147 | VssRay &ray,
|
---|
| 1148 | bool isTermination) const
|
---|
| 1149 | {
|
---|
| 1150 | // test if the leaf where the hitpoint is located is the current leaf
|
---|
| 1151 | if (isTermination)
|
---|
| 1152 | {
|
---|
| 1153 | return ray.mTerminationObject && (GetLeaf(ray.mTermination, ray.mTerminationNode) == leaf);
|
---|
| 1154 | }
|
---|
| 1155 | else
|
---|
| 1156 | {
|
---|
| 1157 | return false; // no origin object!
|
---|
| 1158 | return ray.mOriginObject && (GetLeaf(ray.mOrigin, ray.mOriginNode) == leaf);
|
---|
| 1159 | }
|
---|
| 1160 | }
|
---|
| 1161 |
|
---|
| 1162 |
|
---|
| 1163 | void OspTree::EvalSubdivisionStats(const SubdivisionCandidate &sc)
|
---|
| 1164 | {
|
---|
| 1165 | const float costDecr = sc.GetRenderCostDecrease();
|
---|
| 1166 |
|
---|
| 1167 | AddSubdivisionStats(mOspStats.Leaves(),
|
---|
| 1168 | costDecr,
|
---|
| 1169 | mTotalCost
|
---|
| 1170 | );
|
---|
| 1171 | }
|
---|
| 1172 |
|
---|
| 1173 |
|
---|
| 1174 | void OspTree::AddSubdivisionStats(const int leaves,
|
---|
| 1175 | const float renderCostDecr,
|
---|
| 1176 | const float totalRenderCost)
|
---|
| 1177 | {
|
---|
| 1178 | mSubdivisionStats
|
---|
| 1179 | << "#Leaves\n" << leaves << endl
|
---|
| 1180 | << "#RenderCostDecrease\n" << renderCostDecr << endl
|
---|
| 1181 | << "#TotalRenderCost\n" << totalRenderCost << endl;
|
---|
| 1182 | //<< "#AvgRenderCost\n" << avgRenderCost << endl;
|
---|
| 1183 | }
|
---|
| 1184 |
|
---|
| 1185 |
|
---|
| 1186 | int OspTree::ClassifyRay(VssRay *ray,
|
---|
| 1187 | KdLeaf *leaf,
|
---|
| 1188 | const AxisAlignedPlane &plane) const
|
---|
| 1189 | {
|
---|
| 1190 | const bool originInside = EndPointInsideNode(leaf, *ray, false);
|
---|
| 1191 | const bool terminationInside = EndPointInsideNode(leaf, *ray, true);
|
---|
| 1192 |
|
---|
| 1193 | const bool originGt = (ray->mOrigin[plane.mAxis] >= plane.mPosition);
|
---|
| 1194 | const bool originLt = (ray->mOrigin[plane.mAxis] <= plane.mPosition);
|
---|
| 1195 |
|
---|
| 1196 | const bool terminationGt = (ray->mTermination[plane.mAxis] >= plane.mPosition);
|
---|
| 1197 | const bool terminationLt = (ray->mTermination[plane.mAxis] <= plane.mPosition);
|
---|
| 1198 |
|
---|
| 1199 | // add view cell volume to front volume
|
---|
| 1200 | const bool addToFront =
|
---|
| 1201 | ((originInside && originGt) || (terminationInside && terminationGt));
|
---|
| 1202 |
|
---|
| 1203 | // add view cell volume to back volume
|
---|
| 1204 | const bool addToBack =
|
---|
| 1205 | ((originInside && originLt/*!originGt*/) || (terminationInside && terminationLt/*terminationGt*/));
|
---|
| 1206 |
|
---|
| 1207 | // classify ray with respect to the child nodes the view cells contribute
|
---|
| 1208 | if (addToFront && addToBack)
|
---|
| 1209 | return 0;
|
---|
| 1210 | else if (addToBack)
|
---|
| 1211 | return -1;
|
---|
| 1212 | else if (addToFront)
|
---|
| 1213 | return 1;
|
---|
| 1214 |
|
---|
| 1215 | return -2;
|
---|
| 1216 | }
|
---|
| 1217 |
|
---|
| 1218 |
|
---|
| 1219 | int OspTree::ClassifyRays(const RayInfoContainer &rays,
|
---|
| 1220 | KdLeaf *leaf,
|
---|
| 1221 | const AxisAlignedPlane &plane,
|
---|
| 1222 | RayInfoContainer &frontRays,
|
---|
| 1223 | RayInfoContainer &backRays) const
|
---|
| 1224 | {
|
---|
| 1225 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1226 |
|
---|
| 1227 | for (rit = rays.begin(); rit < rit_end; ++ rit)
|
---|
| 1228 | {
|
---|
| 1229 | VssRay *ray = (*rit).mRay;
|
---|
| 1230 |
|
---|
| 1231 | bool originGt = false;
|
---|
| 1232 | bool terminationGt = false;
|
---|
| 1233 |
|
---|
| 1234 | Intersectable *obj = ray->mOriginObject;
|
---|
| 1235 |
|
---|
| 1236 | if (0 && obj)
|
---|
| 1237 | {
|
---|
| 1238 | originGt = ray->mOrigin[plane.mAxis] >= plane.mPosition;
|
---|
| 1239 | }
|
---|
| 1240 |
|
---|
| 1241 | obj = ray->mTerminationObject;
|
---|
| 1242 |
|
---|
| 1243 | if (obj)
|
---|
| 1244 | {
|
---|
| 1245 | terminationGt = ray->mTermination[plane.mAxis] >= plane.mPosition;
|
---|
| 1246 | }
|
---|
| 1247 |
|
---|
| 1248 | // either begin or end point on front side
|
---|
| 1249 | const bool addToFront = originGt || terminationGt;
|
---|
| 1250 |
|
---|
| 1251 | // add view cell volume to back volume
|
---|
| 1252 | const bool addToBack = !originGt || !terminationGt;
|
---|
| 1253 |
|
---|
| 1254 | // classify ray with respect to the child nodes the view cells contribute
|
---|
| 1255 | if (addToFront)
|
---|
| 1256 | frontRays.push_back(*rit);
|
---|
| 1257 | if (addToBack)
|
---|
| 1258 | backRays.push_back(*rit);
|
---|
| 1259 | }
|
---|
| 1260 |
|
---|
| 1261 | return 0;
|
---|
| 1262 | }
|
---|
| 1263 |
|
---|
| 1264 |
|
---|
| 1265 | float OspTree::EvalRenderCostDecrease(const AxisAlignedPlane &candidatePlane,
|
---|
| 1266 | const OspTraversalData &tData,
|
---|
| 1267 | float &normalizedOldRenderCost) const
|
---|
| 1268 | {
|
---|
| 1269 | float pvsFront = 0;
|
---|
| 1270 | float pvsBack = 0;
|
---|
| 1271 |
|
---|
| 1272 | // probability that view point lies in back / front node
|
---|
[1291] | 1273 | float pOverall = 0;
|
---|
[1237] | 1274 | float pFront = 0;
|
---|
| 1275 | float pBack = 0;
|
---|
| 1276 | float pFrontAndBack = 0;
|
---|
| 1277 |
|
---|
| 1278 | Intersectable::NewMail(3);
|
---|
| 1279 | KdLeaf *leaf = tData.mNode;
|
---|
| 1280 |
|
---|
| 1281 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
| 1282 | const int totalPvs = (int)leaf->mObjects.size();
|
---|
| 1283 |
|
---|
| 1284 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1285 |
|
---|
| 1286 | // evaluate reverse pvs and view cell volume on left and right cell
|
---|
| 1287 | // note: should I take all leaf objects or rather the objects hit by rays?
|
---|
| 1288 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1289 | {
|
---|
| 1290 | int pvsContri = 0;
|
---|
| 1291 |
|
---|
| 1292 | Intersectable *obj = *oit;
|
---|
| 1293 | const AxisAlignedBox3 box = obj->GetBox();
|
---|
| 1294 |
|
---|
| 1295 | // test if box falls in left / right child node
|
---|
| 1296 | if (box.Max(candidatePlane.mAxis) >= candidatePlane.mPosition)
|
---|
| 1297 | {
|
---|
| 1298 | ++ pvsFront;
|
---|
| 1299 | obj->Mail();
|
---|
| 1300 | }
|
---|
| 1301 |
|
---|
| 1302 | if (box.Min(candidatePlane.mAxis) < candidatePlane.mPosition)
|
---|
| 1303 | {
|
---|
| 1304 | ++ pvsBack;
|
---|
| 1305 |
|
---|
| 1306 | if (obj->Mailed())
|
---|
| 1307 | obj->Mail(2);
|
---|
| 1308 | else
|
---|
| 1309 | obj->Mail(1);
|
---|
| 1310 | }
|
---|
| 1311 | }
|
---|
| 1312 |
|
---|
| 1313 | ViewCellContainer touchedViewCells;
|
---|
| 1314 |
|
---|
| 1315 | // sum up volume seen from the objects of left and right children
|
---|
| 1316 | // => the volume is the weight for the render cost equation
|
---|
| 1317 | ViewCell::NewMail(3);
|
---|
| 1318 |
|
---|
| 1319 | RayInfoContainer::const_iterator rit, rit_end = tData.mRays->end();
|
---|
| 1320 | //map<Intersectable *, ViewCellContainer> objectsMap;
|
---|
| 1321 |
|
---|
| 1322 | for (rit = tData.mRays->begin(); rit < rit_end; ++ rit)
|
---|
| 1323 | {
|
---|
| 1324 | VssRay *ray = (*rit).mRay;
|
---|
| 1325 |
|
---|
| 1326 | // add volume to volumes of left and / or right children
|
---|
| 1327 | // if one of the ray end points is inside
|
---|
| 1328 | const int classification = ClassifyRay(ray, leaf, candidatePlane);
|
---|
| 1329 |
|
---|
| 1330 | ViewCellContainer viewCells;
|
---|
| 1331 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 1332 |
|
---|
| 1333 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 1334 |
|
---|
| 1335 | // traverse through view cells and classify them according
|
---|
| 1336 | // to them being seen from to back / front / front and back node
|
---|
| 1337 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1338 | {
|
---|
| 1339 | ViewCell *vc = *vit;
|
---|
| 1340 |
|
---|
| 1341 | // if not previously mailed
|
---|
| 1342 | if (!vc->Mailed() && !vc->Mailed(1) && !vc->Mailed(2))
|
---|
| 1343 | {
|
---|
| 1344 | touchedViewCells.push_back(vc);
|
---|
| 1345 | }
|
---|
| 1346 |
|
---|
| 1347 | // classify / mail the view cell
|
---|
| 1348 | MailViewCell(vc, classification);
|
---|
| 1349 | }
|
---|
| 1350 | }
|
---|
| 1351 |
|
---|
| 1352 | // evaluate view cells volume contribution
|
---|
| 1353 | // with respect to the mail box classification
|
---|
| 1354 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 1355 |
|
---|
| 1356 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1357 | {
|
---|
| 1358 | AddViewCellVolumeContri(*vit, pFront, pBack, pFrontAndBack);
|
---|
| 1359 | }
|
---|
| 1360 |
|
---|
| 1361 | //////////////////////////////////////////////
|
---|
| 1362 | //
|
---|
| 1363 | // evaluate contribution of objects which are part of other kd nodes
|
---|
| 1364 | // which are seen by the same view cell
|
---|
| 1365 | // These contributions cannot be reduced by splitting, because
|
---|
| 1366 | // the object would still be part of the pvs
|
---|
| 1367 |
|
---|
| 1368 | float newRc = 0;
|
---|
| 1369 | float rc = 0;
|
---|
| 1370 |
|
---|
| 1371 | MailablePvsData::NewMail();
|
---|
| 1372 | //ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1373 |
|
---|
| 1374 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1375 | {
|
---|
| 1376 | Intersectable *obj = *oit;
|
---|
| 1377 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 1378 |
|
---|
| 1379 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1380 | {
|
---|
| 1381 | ViewCell *vc = *vit;
|
---|
| 1382 |
|
---|
| 1383 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
| 1384 |
|
---|
| 1385 | if (!vdata)
|
---|
| 1386 | {
|
---|
[1297] | 1387 | Debug << "error!!" << endl;
|
---|
[1237] | 1388 | continue;
|
---|
| 1389 | }
|
---|
| 1390 |
|
---|
| 1391 | if (!vdata->Mailed())
|
---|
| 1392 | {
|
---|
| 1393 | vdata->Mail();
|
---|
| 1394 | rc += vc->GetVolume();
|
---|
| 1395 |
|
---|
| 1396 | if ((vdata->mSumPdf > 1.5) ||
|
---|
| 1397 | vc->Mailed(2) ||
|
---|
| 1398 | obj->Mailed(2) ||
|
---|
| 1399 | (obj->Mailed() && vc->Mailed()) ||
|
---|
| 1400 | (obj->Mailed(1) && vc->Mailed(1))
|
---|
| 1401 | )
|
---|
| 1402 | {
|
---|
| 1403 | newRc += vc->GetVolume();
|
---|
| 1404 | }
|
---|
| 1405 | }
|
---|
| 1406 | }
|
---|
| 1407 | }
|
---|
| 1408 |
|
---|
| 1409 |
|
---|
| 1410 | /////////////////////////////
|
---|
| 1411 | //-- pvs rendering heuristics
|
---|
| 1412 |
|
---|
[1291] | 1413 | const float oldRenderCost = rc;
|
---|
[1237] | 1414 |
|
---|
| 1415 | // sum up the terms:
|
---|
| 1416 | // the view cells seeing
|
---|
| 1417 | // a) the left node are weighted by the #left node objects
|
---|
| 1418 | // b) the right node are weighted by the #right node objects
|
---|
| 1419 | // c) both nodes are weighted by the #parent node objects
|
---|
[1291] | 1420 | const float newRenderCost = newRc;
|
---|
[1237] | 1421 |
|
---|
[1291] | 1422 |
|
---|
[1237] | 1423 | // normalize volume with view space volume
|
---|
| 1424 | const float renderCostDecrease = (oldRenderCost - newRenderCost) / viewSpaceVol;
|
---|
| 1425 |
|
---|
[1291] | 1426 | Debug << "\nrender cost decrease: " << endl
|
---|
[1237] | 1427 | << "old rc: " << oldRenderCost / viewSpaceVol << " new rc: " << newRenderCost / viewSpaceVol << endl
|
---|
| 1428 | << "render cost decrease: " << renderCostDecrease << endl;
|
---|
| 1429 |
|
---|
| 1430 | normalizedOldRenderCost = oldRenderCost / viewSpaceVol;
|
---|
| 1431 |
|
---|
| 1432 |
|
---|
| 1433 | return renderCostDecrease;
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 |
|
---|
[1287] | 1437 | void OspTree::ComputeBoundingBox(const ObjectContainer &objects)
|
---|
[1237] | 1438 | {
|
---|
[1287] | 1439 | mBoundingBox.Initialize();
|
---|
[1237] | 1440 |
|
---|
[1287] | 1441 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
[1237] | 1442 |
|
---|
[1287] | 1443 | //-- compute bounding box
|
---|
| 1444 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
| 1445 | {
|
---|
| 1446 | Intersectable *obj = *oit;
|
---|
[1237] | 1447 |
|
---|
[1287] | 1448 | // compute bounding box of view space
|
---|
| 1449 | mBoundingBox.Include(obj->GetBox());
|
---|
[1237] | 1450 | }
|
---|
| 1451 | }
|
---|
| 1452 |
|
---|
| 1453 |
|
---|
| 1454 | void OspTree::ProcessMultipleRefs(KdLeaf *leaf) const
|
---|
| 1455 | {
|
---|
| 1456 | // find objects from multiple kd-leaves
|
---|
| 1457 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1458 |
|
---|
| 1459 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1460 | {
|
---|
| 1461 | Intersectable *object = *oit;
|
---|
| 1462 |
|
---|
| 1463 | if (object->mReferences > 1)
|
---|
| 1464 | {
|
---|
| 1465 | leaf->mMultipleObjects.push_back(object);
|
---|
| 1466 | }
|
---|
| 1467 | }
|
---|
| 1468 | }
|
---|
| 1469 |
|
---|
| 1470 |
|
---|
| 1471 | void OspTree::CollectLeaves(vector<KdLeaf *> &leaves) const
|
---|
| 1472 | {
|
---|
| 1473 | stack<KdNode *> nodeStack;
|
---|
| 1474 | nodeStack.push(mRoot);
|
---|
| 1475 |
|
---|
| 1476 | while (!nodeStack.empty())
|
---|
| 1477 | {
|
---|
| 1478 | KdNode *node = nodeStack.top();
|
---|
| 1479 | nodeStack.pop();
|
---|
| 1480 | if (node->IsLeaf())
|
---|
| 1481 | {
|
---|
| 1482 | KdLeaf *leaf = (KdLeaf *)node;
|
---|
| 1483 | leaves.push_back(leaf);
|
---|
| 1484 | }
|
---|
| 1485 | else
|
---|
| 1486 | {
|
---|
| 1487 | KdInterior *interior = (KdInterior *)node;
|
---|
| 1488 | nodeStack.push(interior->mBack);
|
---|
| 1489 | nodeStack.push(interior->mFront);
|
---|
| 1490 | }
|
---|
| 1491 | }
|
---|
| 1492 | }
|
---|
| 1493 |
|
---|
| 1494 |
|
---|
| 1495 | AxisAlignedBox3 OspTree::GetBoundingBox(KdNode *node) const
|
---|
| 1496 | {
|
---|
| 1497 | if (!node->mParent)
|
---|
| 1498 | return mBoundingBox;
|
---|
| 1499 |
|
---|
| 1500 | if (!node->IsLeaf())
|
---|
| 1501 | {
|
---|
| 1502 | return (dynamic_cast<KdInterior *>(node))->mBox;
|
---|
| 1503 | }
|
---|
| 1504 |
|
---|
| 1505 | KdInterior *parent = dynamic_cast<KdInterior *>(node->mParent);
|
---|
| 1506 |
|
---|
| 1507 | AxisAlignedBox3 box(parent->mBox);
|
---|
| 1508 |
|
---|
| 1509 | if (parent->mFront == node)
|
---|
| 1510 | box.SetMin(parent->mAxis, parent->mPosition);
|
---|
| 1511 | else
|
---|
| 1512 | box.SetMax(parent->mAxis, parent->mPosition);
|
---|
| 1513 |
|
---|
| 1514 | return box;
|
---|
| 1515 | }
|
---|
| 1516 |
|
---|
| 1517 |
|
---|
| 1518 | void OspTree::CollectViewCells(KdLeaf *leaf, ViewCellContainer &viewCells)
|
---|
| 1519 | {
|
---|
| 1520 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1521 |
|
---|
| 1522 | ViewCell::NewMail();
|
---|
| 1523 |
|
---|
| 1524 | // loop through all object and collect view cell pvs of this node
|
---|
| 1525 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1526 | {
|
---|
| 1527 | Intersectable *obj = *oit;
|
---|
| 1528 |
|
---|
| 1529 | ViewCellPvsMap::const_iterator vit, vit_end = obj->mViewCellPvs.mEntries.end();
|
---|
| 1530 |
|
---|
| 1531 | for (vit = obj->mViewCellPvs.mEntries.begin(); vit != vit_end; ++ vit)
|
---|
| 1532 | {
|
---|
| 1533 | ViewCell *vc = (*vit).first;
|
---|
| 1534 |
|
---|
| 1535 | if (!vc->Mailed())
|
---|
| 1536 | {
|
---|
| 1537 | vc->Mail();
|
---|
| 1538 | viewCells.push_back(vc);
|
---|
| 1539 | }
|
---|
| 1540 | }
|
---|
| 1541 | }
|
---|
| 1542 | }
|
---|
| 1543 |
|
---|
| 1544 |
|
---|
| 1545 | void OspTree::CollectDirtyCandidates(OspSubdivisionCandidate *sc,
|
---|
| 1546 | vector<SubdivisionCandidate *> &dirtyList)
|
---|
| 1547 | {
|
---|
| 1548 | OspTraversalData &tData = sc->mParentData;
|
---|
| 1549 | KdLeaf *node = tData.mNode;
|
---|
| 1550 |
|
---|
| 1551 | ViewCell::NewMail();
|
---|
| 1552 | ViewCellContainer viewCells;
|
---|
| 1553 | ViewCellContainer tmpViewCells;
|
---|
| 1554 |
|
---|
| 1555 | RayInfoContainer::const_iterator rit, rit_end = tData.mRays->end();
|
---|
| 1556 |
|
---|
| 1557 | // find all view cells associated with the rays, add them to view cells
|
---|
| 1558 | for (rit = tData.mRays->begin(); rit != rit_end; ++ rit)
|
---|
| 1559 | {
|
---|
| 1560 | VssRay *ray = (*rit).mRay;
|
---|
| 1561 | mVspTree->GetViewCells(*ray, tmpViewCells);
|
---|
| 1562 |
|
---|
| 1563 | ViewCellContainer::const_iterator vit, vit_end = tmpViewCells.end();
|
---|
| 1564 |
|
---|
| 1565 | for (vit = tmpViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1566 | {
|
---|
| 1567 | VspViewCell *vc = dynamic_cast<VspViewCell *>(*vit);
|
---|
| 1568 |
|
---|
| 1569 | if (!vc->Mailed())
|
---|
| 1570 | {
|
---|
| 1571 | vc->Mail();
|
---|
| 1572 | viewCells.push_back(vc);
|
---|
| 1573 | }
|
---|
| 1574 | }
|
---|
| 1575 | }
|
---|
| 1576 |
|
---|
| 1577 |
|
---|
| 1578 | // split candidates holding this view cells
|
---|
| 1579 | // are thrown into dirty list
|
---|
| 1580 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 1581 |
|
---|
| 1582 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1583 | {
|
---|
| 1584 | VspViewCell *vc = dynamic_cast<VspViewCell *>(*vit);
|
---|
| 1585 |
|
---|
| 1586 | VspLeaf *leaf = vc->mLeaf;
|
---|
| 1587 | dirtyList.push_back(leaf->GetSubdivisionCandidate());
|
---|
| 1588 | }
|
---|
| 1589 | }
|
---|
| 1590 |
|
---|
| 1591 |
|
---|
| 1592 | KdNode *OspTree::GetRoot() const
|
---|
| 1593 | {
|
---|
| 1594 | return mRoot;
|
---|
| 1595 | }
|
---|
| 1596 |
|
---|
| 1597 |
|
---|
| 1598 | KdLeaf *OspTree::GetLeaf(const Vector3 &pt, KdNode *node) const
|
---|
| 1599 | {
|
---|
| 1600 | // start from root of tree
|
---|
| 1601 | if (node == NULL)
|
---|
| 1602 | {
|
---|
| 1603 | node = mRoot;
|
---|
| 1604 | }
|
---|
| 1605 |
|
---|
| 1606 | stack<KdNode *> nodeStack;
|
---|
| 1607 | nodeStack.push(node);
|
---|
| 1608 |
|
---|
| 1609 | KdLeaf *leaf = NULL;
|
---|
| 1610 |
|
---|
| 1611 | while (!nodeStack.empty())
|
---|
| 1612 | {
|
---|
| 1613 | KdNode *node = nodeStack.top();
|
---|
| 1614 | nodeStack.pop();
|
---|
| 1615 |
|
---|
| 1616 | if (node->IsLeaf())
|
---|
| 1617 | {
|
---|
| 1618 | leaf = dynamic_cast<KdLeaf *>(node);
|
---|
| 1619 | }
|
---|
| 1620 | else
|
---|
| 1621 | {
|
---|
| 1622 | // find point
|
---|
| 1623 | KdInterior *interior = dynamic_cast<KdInterior *>(node);
|
---|
| 1624 |
|
---|
| 1625 | if (interior->mPosition > pt[interior->mAxis])
|
---|
| 1626 | {
|
---|
| 1627 | nodeStack.push(interior->mBack);
|
---|
| 1628 | }
|
---|
| 1629 | else
|
---|
| 1630 | {
|
---|
| 1631 | nodeStack.push(interior->mFront);
|
---|
| 1632 | }
|
---|
| 1633 | }
|
---|
| 1634 | }
|
---|
| 1635 |
|
---|
| 1636 | return leaf;
|
---|
| 1637 | }
|
---|
| 1638 |
|
---|
| 1639 |
|
---|
| 1640 | void OspTree::PreprocessRays(KdLeaf *root,
|
---|
| 1641 | const VssRayContainer &sampleRays,
|
---|
| 1642 | RayInfoContainer &rays)
|
---|
| 1643 | {
|
---|
| 1644 | VssRayContainer::const_iterator rit, rit_end = sampleRays.end();
|
---|
| 1645 | RayInfoContainer clippedRays;
|
---|
| 1646 |
|
---|
| 1647 | long startTime = GetTime();
|
---|
| 1648 |
|
---|
| 1649 | cout << "storing rays ... ";
|
---|
| 1650 |
|
---|
| 1651 | Intersectable::NewMail();
|
---|
| 1652 |
|
---|
| 1653 | //-- store rays and objects
|
---|
| 1654 | for (rit = sampleRays.begin(); rit != rit_end; ++ rit)
|
---|
| 1655 | {
|
---|
| 1656 | VssRay *ray = *rit;
|
---|
| 1657 |
|
---|
| 1658 | float minT, maxT;
|
---|
| 1659 | static Ray hray;
|
---|
| 1660 |
|
---|
| 1661 | hray.Init(*ray);
|
---|
| 1662 |
|
---|
| 1663 | // TODO: not very efficient to implictly cast between rays types
|
---|
| 1664 | if (GetBoundingBox().GetRaySegment(hray, minT, maxT))
|
---|
| 1665 | {
|
---|
| 1666 | float len = ray->Length();
|
---|
| 1667 | if (!len)
|
---|
| 1668 | len = Limits::Small;
|
---|
| 1669 |
|
---|
| 1670 | clippedRays.push_back(RayInfo(ray, minT / len, maxT / len));
|
---|
| 1671 |
|
---|
| 1672 | // HACK: reset nodes for the case we have used object kd tree for
|
---|
| 1673 | // tree building.
|
---|
| 1674 | ray->mOriginNode = NULL;
|
---|
| 1675 | ray->mTerminationNode = NULL;
|
---|
| 1676 | }
|
---|
| 1677 | }
|
---|
| 1678 |
|
---|
| 1679 | FilterRays(root, clippedRays, rays);
|
---|
| 1680 |
|
---|
| 1681 | cout << "finished in " << TimeDiff(startTime, GetTime()) * 1e-3 << " secs" << endl;
|
---|
| 1682 | }
|
---|
| 1683 |
|
---|
| 1684 |
|
---|
| 1685 |
|
---|
| 1686 | int OspTree::SplitRays(const AxisAlignedPlane &plane,
|
---|
| 1687 | RayInfoContainer &rays,
|
---|
| 1688 | RayInfoContainer &frontRays,
|
---|
| 1689 | RayInfoContainer &backRays) const
|
---|
| 1690 | {
|
---|
| 1691 | int splits = 0;
|
---|
| 1692 |
|
---|
| 1693 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1694 |
|
---|
| 1695 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
| 1696 | {
|
---|
| 1697 | RayInfo bRay = *rit;
|
---|
| 1698 |
|
---|
| 1699 | VssRay *ray = bRay.mRay;
|
---|
| 1700 | float t;
|
---|
| 1701 |
|
---|
| 1702 | // get classification and receive new t
|
---|
| 1703 | //-- test if start point behind or in front of plane
|
---|
| 1704 | const int side = bRay.ComputeRayIntersection(plane.mAxis, plane.mPosition, t);
|
---|
| 1705 |
|
---|
| 1706 | if (side == 0)
|
---|
| 1707 | {
|
---|
| 1708 | ++ splits;
|
---|
| 1709 |
|
---|
| 1710 | if (ray->HasPosDir(plane.mAxis))
|
---|
| 1711 | {
|
---|
| 1712 | backRays.push_back(RayInfo(ray, bRay.GetMinT(), t));
|
---|
| 1713 | frontRays.push_back(RayInfo(ray, t, bRay.GetMaxT()));
|
---|
| 1714 | }
|
---|
| 1715 | else
|
---|
| 1716 | {
|
---|
| 1717 | frontRays.push_back(RayInfo(ray, bRay.GetMinT(), t));
|
---|
| 1718 | backRays.push_back(RayInfo(ray, t, bRay.GetMaxT()));
|
---|
| 1719 | }
|
---|
| 1720 | }
|
---|
| 1721 | else if (side == 1)
|
---|
| 1722 | {
|
---|
| 1723 | frontRays.push_back(bRay);
|
---|
| 1724 | }
|
---|
| 1725 | else
|
---|
| 1726 | {
|
---|
| 1727 | backRays.push_back(bRay);
|
---|
| 1728 | }
|
---|
| 1729 | }
|
---|
| 1730 |
|
---|
| 1731 | return splits;
|
---|
| 1732 | }
|
---|
| 1733 |
|
---|
| 1734 |
|
---|
| 1735 | int OspTree::FilterRays(KdLeaf *leaf,
|
---|
| 1736 | const RayInfoContainer &rays,
|
---|
| 1737 | RayInfoContainer &filteredRays)
|
---|
| 1738 | {
|
---|
| 1739 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1740 |
|
---|
| 1741 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
| 1742 | {
|
---|
| 1743 | VssRay *ray = (*rit).mRay;
|
---|
| 1744 |
|
---|
| 1745 | // test if intersection point with one of the objects is inside this node
|
---|
| 1746 | const bool originInside = EndPointInsideNode(leaf, *ray, false);
|
---|
| 1747 | const bool terminationInside = EndPointInsideNode(leaf, *ray, true);
|
---|
| 1748 |
|
---|
| 1749 | if (originInside || terminationInside)
|
---|
| 1750 | {
|
---|
| 1751 | filteredRays.push_back(ray);
|
---|
| 1752 | }
|
---|
| 1753 | }
|
---|
| 1754 |
|
---|
| 1755 | return 0;
|
---|
| 1756 | }
|
---|
| 1757 |
|
---|
| 1758 |
|
---|
| 1759 | int OspTree::CheckViewCellsPvs(KdLeaf *leaf,
|
---|
| 1760 | const RayInfoContainer &rays) const
|
---|
| 1761 | {
|
---|
| 1762 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1763 |
|
---|
| 1764 | Intersectable::NewMail();
|
---|
| 1765 | ObjectContainer touchedObjects;
|
---|
| 1766 |
|
---|
| 1767 |
|
---|
| 1768 | for (rit = rays.begin(); rit < rit_end; ++ rit)
|
---|
| 1769 | {
|
---|
| 1770 | VssRay *ray = (*rit).mRay;
|
---|
| 1771 |
|
---|
| 1772 | if (ray->mTerminationObject)
|
---|
| 1773 | {
|
---|
| 1774 | Intersectable *obj = ray->mTerminationObject;
|
---|
| 1775 |
|
---|
| 1776 | if (!obj->Mailed())
|
---|
| 1777 | {
|
---|
| 1778 | obj->Mail();
|
---|
| 1779 | touchedObjects.push_back(obj);
|
---|
| 1780 | }
|
---|
| 1781 | }
|
---|
| 1782 |
|
---|
| 1783 | if (ray->mOriginObject)
|
---|
| 1784 | {
|
---|
| 1785 | Intersectable *obj = ray->mOriginObject;
|
---|
| 1786 |
|
---|
| 1787 | if (!obj->Mailed())
|
---|
| 1788 | {
|
---|
| 1789 | obj->Mail();
|
---|
| 1790 | touchedObjects.push_back(obj);
|
---|
| 1791 | }
|
---|
| 1792 | }
|
---|
| 1793 | }
|
---|
[1297] | 1794 | Debug << "touched view cells: " << (int)touchedObjects.size() << endl;
|
---|
[1237] | 1795 | ObjectContainer::const_iterator it, it_end = touchedObjects.end();
|
---|
| 1796 | for (it = touchedObjects.begin(); it != it_end; ++ it)
|
---|
| 1797 | {
|
---|
[1297] | 1798 | Debug << "\nobj: " << (*it) << " vc pvs size: " << (*it)->mViewCellPvs.GetSize() << endl << endl;
|
---|
[1237] | 1799 | ViewCellPvsMap::const_iterator mit, mit_end = (*it)->mViewCellPvs.mEntries.end();
|
---|
| 1800 |
|
---|
| 1801 | for (mit = (*it)->mViewCellPvs.mEntries.begin(); mit != mit_end; ++ mit)
|
---|
| 1802 | {
|
---|
[1297] | 1803 | Debug << "new sumpdf: " << (*mit).second.mSumPdf << endl;
|
---|
[1237] | 1804 | }
|
---|
| 1805 | }
|
---|
| 1806 |
|
---|
| 1807 | return 0;
|
---|
| 1808 | }
|
---|
| 1809 |
|
---|
| 1810 |
|
---|
| 1811 | KdIntersectable *OspTree::GetOrCreateKdIntersectable(KdNode *node)
|
---|
| 1812 | {
|
---|
| 1813 | // search nodes
|
---|
| 1814 | std::map<KdNode *, KdIntersectable *>::
|
---|
| 1815 | const_iterator it = mKdIntersectables.find(node);
|
---|
| 1816 |
|
---|
| 1817 | if (it != mKdIntersectables.end())
|
---|
| 1818 | {
|
---|
| 1819 | return (*it).second;
|
---|
| 1820 | }
|
---|
| 1821 |
|
---|
| 1822 | // not in map => create new entry
|
---|
| 1823 | KdIntersectable *kdObj = new KdIntersectable(node);
|
---|
| 1824 | mKdIntersectables[node] = kdObj;
|
---|
| 1825 |
|
---|
| 1826 | return kdObj;
|
---|
| 1827 | }
|
---|
| 1828 |
|
---|
| 1829 |
|
---|
| 1830 | /*
|
---|
| 1831 | void OspTree::AddViewCellVolume(ViewCell *vc,
|
---|
| 1832 | const int cf,
|
---|
| 1833 | float &frontVol,
|
---|
| 1834 | float &backVol,
|
---|
| 1835 | float &totalVol) const
|
---|
| 1836 | {
|
---|
| 1837 | //const float renderCost = mViewCellsManager->SimpleRay &raynderCost(obj);
|
---|
| 1838 | const float vol = vc->GetVolume();
|
---|
| 1839 |
|
---|
| 1840 | // view cell not found yet => new
|
---|
| 1841 | if (!vc->Mailed() && !vc->Mailed(1) && !vc->Mailed(2))
|
---|
| 1842 | {
|
---|
| 1843 | totalVol += vol;
|
---|
| 1844 | }
|
---|
| 1845 |
|
---|
| 1846 | if (cf >= 0) // front volume
|
---|
| 1847 | {
|
---|
| 1848 | if (!vc->Mailed() && !vc->Mailed(2))
|
---|
| 1849 | {
|
---|
| 1850 | frontVol += vol;
|
---|
| 1851 |
|
---|
| 1852 | // already in back volume => in both volumes
|
---|
| 1853 | if (vc->Mailed(1))
|
---|
| 1854 | vc->Mail(2);
|
---|
| 1855 | else
|
---|
| 1856 | vc->Mail();
|
---|
| 1857 | }
|
---|
| 1858 | }
|
---|
| 1859 |
|
---|
| 1860 | if (cf <= 0) // back volume
|
---|
| 1861 | {
|
---|
| 1862 | if (!vc->Mailed(1) && !vc->Mailed(2))
|
---|
| 1863 | {
|
---|
| 1864 | backVol += vol;
|
---|
| 1865 |
|
---|
| 1866 | // already in front volume => in both volume
|
---|
| 1867 | if (vc->Mailed())
|
---|
| 1868 | vc->Mail(2);
|
---|
| 1869 | else
|
---|
| 1870 | vc->Mail(1);
|
---|
| 1871 | }
|
---|
| 1872 | }
|
---|
| 1873 | }
|
---|
| 1874 | */
|
---|
| 1875 |
|
---|
| 1876 |
|
---|
| 1877 | void OspTree::MailViewCell(ViewCell *vc, const int cf) const
|
---|
| 1878 | {
|
---|
| 1879 | if (vc->Mailed(2)) // already classified
|
---|
| 1880 | return;
|
---|
| 1881 |
|
---|
| 1882 | if (cf >= 0) // front volume
|
---|
| 1883 | {
|
---|
| 1884 | // already in back volume => in both volumes
|
---|
| 1885 | if (vc->Mailed(1))
|
---|
| 1886 | {
|
---|
| 1887 | vc->Mail(2);
|
---|
| 1888 | }
|
---|
| 1889 | else
|
---|
| 1890 | {
|
---|
| 1891 | vc->Mail();
|
---|
| 1892 | }
|
---|
| 1893 | }
|
---|
| 1894 |
|
---|
| 1895 | if (cf <= 0) // back volume
|
---|
| 1896 | {
|
---|
| 1897 | // already in front volume => in both volume
|
---|
| 1898 | if (vc->Mailed())
|
---|
| 1899 | {
|
---|
| 1900 | vc->Mail(2);
|
---|
| 1901 | }
|
---|
| 1902 | else
|
---|
| 1903 | {
|
---|
| 1904 | vc->Mail(1);
|
---|
| 1905 | }
|
---|
| 1906 | }
|
---|
| 1907 | }
|
---|
| 1908 |
|
---|
| 1909 |
|
---|
| 1910 | void OspTree::AddViewCellVolumeContri(ViewCell *vc,
|
---|
| 1911 | float &frontVol,
|
---|
| 1912 | float &backVol,
|
---|
| 1913 | float &frontAndBackVol) const
|
---|
| 1914 | {
|
---|
| 1915 | if (vc->Mailed())
|
---|
| 1916 | {
|
---|
| 1917 | frontVol += vc->GetVolume();
|
---|
| 1918 | }
|
---|
| 1919 | else if (vc->Mailed(1))
|
---|
| 1920 | {
|
---|
| 1921 | backVol += vc->GetVolume();
|
---|
| 1922 | }
|
---|
| 1923 | else if (vc->Mailed(2))
|
---|
| 1924 | {
|
---|
| 1925 | frontAndBackVol += vc->GetVolume();
|
---|
| 1926 | }
|
---|
| 1927 | }
|
---|
| 1928 |
|
---|
| 1929 |
|
---|
| 1930 | float OspTree::EvalViewCellsVolume(KdLeaf *leaf,
|
---|
| 1931 | const RayInfoContainer &rays) const
|
---|
| 1932 | {
|
---|
| 1933 | float vol = 0;
|
---|
| 1934 | ViewCell::NewMail();
|
---|
| 1935 |
|
---|
| 1936 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1937 |
|
---|
| 1938 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
| 1939 | {
|
---|
| 1940 | VssRay *ray = (*rit).mRay;
|
---|
| 1941 |
|
---|
| 1942 | ViewCellContainer viewCells;
|
---|
| 1943 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 1944 |
|
---|
| 1945 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 1946 |
|
---|
| 1947 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1948 | {
|
---|
| 1949 | ViewCell *vc = *vit;
|
---|
| 1950 |
|
---|
| 1951 | if (!vc->Mailed())
|
---|
| 1952 | {
|
---|
| 1953 | vc->Mail();
|
---|
| 1954 | vol += vc->GetVolume();
|
---|
| 1955 | }
|
---|
| 1956 | }
|
---|
| 1957 | }
|
---|
| 1958 |
|
---|
| 1959 | return vol;
|
---|
| 1960 | }
|
---|
| 1961 |
|
---|
| 1962 |
|
---|
| 1963 | bool OspTree::AddViewCellToObjectPvs(Intersectable *obj,
|
---|
| 1964 | ViewCell *vc,
|
---|
| 1965 | float &contribution,
|
---|
| 1966 | bool onlyMailed) const
|
---|
| 1967 | {
|
---|
| 1968 | contribution = 0; // todo
|
---|
| 1969 |
|
---|
| 1970 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
| 1971 |
|
---|
| 1972 | if (!vdata)
|
---|
| 1973 | {
|
---|
| 1974 | vdata = obj->mViewCellPvs.AddSample2(vc, 1);
|
---|
| 1975 | }
|
---|
| 1976 | else if (!onlyMailed || !vdata->Mailed())
|
---|
| 1977 | {
|
---|
| 1978 | obj->mViewCellPvs.AddSample(vc, 1);
|
---|
| 1979 | }
|
---|
| 1980 |
|
---|
| 1981 | vdata->Mail();
|
---|
| 1982 |
|
---|
| 1983 | return true;
|
---|
| 1984 | }
|
---|
| 1985 |
|
---|
| 1986 |
|
---|
| 1987 | void OspTree::CollectTouchedViewCells(const RayInfoContainer &rays,
|
---|
| 1988 | ViewCellContainer &touchedViewCells) const
|
---|
| 1989 | {
|
---|
| 1990 | ViewCell::NewMail();
|
---|
| 1991 |
|
---|
| 1992 | RayInfoContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1993 |
|
---|
| 1994 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
| 1995 | {
|
---|
| 1996 | VssRay *ray = (*rit).mRay;
|
---|
| 1997 |
|
---|
| 1998 | ViewCellContainer viewCells;
|
---|
| 1999 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 2000 |
|
---|
| 2001 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 2002 |
|
---|
| 2003 | // traverse through view cells and classify them according
|
---|
| 2004 | // to them being seen from to back / front / front and back node
|
---|
| 2005 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2006 | {
|
---|
| 2007 | ViewCell *vc = *vit;
|
---|
| 2008 | if (!vc->Mailed())
|
---|
| 2009 | {
|
---|
| 2010 | vc->Mail();
|
---|
| 2011 | touchedViewCells.push_back(vc);
|
---|
| 2012 | }
|
---|
| 2013 | }
|
---|
| 2014 | }
|
---|
| 2015 | }
|
---|
| 2016 |
|
---|
| 2017 |
|
---|
| 2018 | int OspTree::UpdateViewCellsPvs(KdLeaf *leaf,
|
---|
| 2019 | const RayInfoContainer &rays) const
|
---|
| 2020 |
|
---|
| 2021 | {
|
---|
| 2022 | MailablePvsData::NewMail();
|
---|
| 2023 |
|
---|
| 2024 | ViewCellContainer touchedViewCells;
|
---|
| 2025 | CollectTouchedViewCells(rays, touchedViewCells);
|
---|
| 2026 |
|
---|
| 2027 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 2028 |
|
---|
| 2029 | for (oit = leaf->mObjects.begin(); oit < oit_end; ++ oit)
|
---|
| 2030 | {
|
---|
| 2031 | Intersectable *obj = *oit;
|
---|
| 2032 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 2033 |
|
---|
| 2034 | // traverse through view cells and classify them according
|
---|
| 2035 | // to them being seen from to back / front / front and back node
|
---|
| 2036 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2037 | {
|
---|
| 2038 | ViewCell *vc = *vit;
|
---|
| 2039 | float contri;
|
---|
| 2040 | AddViewCellToObjectPvs(obj, vc, contri, true);
|
---|
| 2041 | }
|
---|
| 2042 | }
|
---|
| 2043 |
|
---|
| 2044 | return 0;
|
---|
| 2045 | }
|
---|
| 2046 |
|
---|
| 2047 |
|
---|
| 2048 | int OspTree::RemoveParentViewCellsPvs(KdLeaf *leaf,
|
---|
| 2049 | const RayInfoContainer &rays
|
---|
| 2050 | ) const
|
---|
| 2051 |
|
---|
| 2052 | {
|
---|
| 2053 | MailablePvsData::NewMail();
|
---|
| 2054 |
|
---|
| 2055 | ViewCellContainer touchedViewCells;
|
---|
| 2056 | CollectTouchedViewCells(rays, touchedViewCells);
|
---|
| 2057 |
|
---|
| 2058 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 2059 |
|
---|
| 2060 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 2061 | {
|
---|
| 2062 | Intersectable *obj = *oit;
|
---|
| 2063 |
|
---|
| 2064 | // traverse through view cells and classify them according
|
---|
| 2065 | // to them being seen from to back / front / front and back node
|
---|
| 2066 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 2067 |
|
---|
| 2068 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2069 | {
|
---|
| 2070 | ViewCell *vc = *vit;
|
---|
| 2071 |
|
---|
| 2072 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
| 2073 |
|
---|
| 2074 | if (vdata && !vdata->Mailed())
|
---|
| 2075 | {
|
---|
| 2076 | vdata->Mail();
|
---|
| 2077 | obj->mViewCellPvs.RemoveSample(vc, 1);
|
---|
| 2078 | }
|
---|
| 2079 | }
|
---|
| 2080 | }
|
---|
| 2081 |
|
---|
| 2082 | return 0;
|
---|
| 2083 | }
|
---|
| 2084 |
|
---|
| 2085 |
|
---|
| 2086 | float OspTree::EvalRenderCost(const VssRayContainer &myrays)
|
---|
| 2087 | {
|
---|
| 2088 | float rc = 0;
|
---|
| 2089 | float prop = mVspTree->GetBoundingBox().GetVolume();
|
---|
| 2090 |
|
---|
| 2091 | KdLeafContainer leaves;
|
---|
| 2092 | CollectLeaves(leaves);
|
---|
| 2093 |
|
---|
| 2094 | ViewCellContainer vcleaves;
|
---|
| 2095 | mVspTree->CollectViewCells(vcleaves, false);
|
---|
| 2096 |
|
---|
| 2097 |
|
---|
| 2098 | ViewCellContainer::const_iterator vit, vit_end = vcleaves.end();
|
---|
| 2099 |
|
---|
| 2100 | for (vit = vcleaves.begin(); vit != vit_end; ++ vit)
|
---|
| 2101 | {
|
---|
| 2102 | ViewCell *vc = *vit;
|
---|
| 2103 | vc->GetPvs().Clear();
|
---|
| 2104 | }
|
---|
| 2105 |
|
---|
| 2106 | KdLeafContainer::const_iterator kit, kit_end = leaves.end();
|
---|
| 2107 |
|
---|
| 2108 | MailablePvsData::NewMail();
|
---|
| 2109 |
|
---|
| 2110 | for (kit = leaves.begin(); kit != kit_end; ++ kit)
|
---|
| 2111 | {
|
---|
| 2112 | KdLeaf *leaf = *kit;
|
---|
| 2113 | float newCost = 0;
|
---|
| 2114 | float vol = 0;
|
---|
| 2115 |
|
---|
| 2116 | ViewCell::NewMail();
|
---|
| 2117 | VssRayContainer::const_iterator rit, rit_end = leaf->mVssRays.end();
|
---|
| 2118 | ViewCellContainer touchedViewCells;
|
---|
| 2119 |
|
---|
| 2120 | for (rit = leaf->mVssRays.begin(); rit != rit_end; ++ rit)
|
---|
| 2121 | {
|
---|
| 2122 | VssRay *ray = *rit;
|
---|
| 2123 |
|
---|
| 2124 | // test if intersection point with one of the objects is inside this node
|
---|
| 2125 | const bool originInside = EndPointInsideNode(leaf, *ray, false);
|
---|
| 2126 | const bool terminationInside = EndPointInsideNode(leaf, *ray, true);
|
---|
| 2127 |
|
---|
| 2128 | if (originInside || terminationInside)
|
---|
| 2129 | {
|
---|
| 2130 | ViewCellContainer viewCells;
|
---|
| 2131 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 2132 |
|
---|
| 2133 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 2134 |
|
---|
| 2135 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2136 | {
|
---|
| 2137 | ViewCell *vc = *vit;
|
---|
| 2138 |
|
---|
| 2139 | // if not previously mailed
|
---|
| 2140 | if (!vc->Mailed())
|
---|
| 2141 | {
|
---|
| 2142 | vc->Mail();
|
---|
| 2143 | touchedViewCells.push_back(vc);
|
---|
| 2144 | }
|
---|
| 2145 |
|
---|
| 2146 | }
|
---|
| 2147 | }
|
---|
| 2148 | }
|
---|
| 2149 |
|
---|
| 2150 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 2151 |
|
---|
| 2152 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 2153 | {
|
---|
| 2154 | Intersectable *obj = *oit;
|
---|
| 2155 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 2156 |
|
---|
| 2157 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2158 | {
|
---|
| 2159 | ViewCell *vc = *vit;
|
---|
| 2160 | PvsData *vdata = vc->GetPvs().Find(obj);
|
---|
| 2161 |
|
---|
| 2162 | if (!vdata)
|
---|
| 2163 | {
|
---|
| 2164 | vc->GetPvs().AddSample(obj, 1);
|
---|
| 2165 | newCost += vc->GetVolume();
|
---|
| 2166 | }
|
---|
| 2167 |
|
---|
| 2168 | /* MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
| 2169 |
|
---|
| 2170 | if (!vdata || !vdata->Mailed())
|
---|
| 2171 | {
|
---|
| 2172 | newCost += vc->GetVolume();
|
---|
| 2173 | if (!vdata)
|
---|
| 2174 | vdata = obj->mViewCellPvs.AddSample2(vc, 1);
|
---|
| 2175 | vdata->Mail();
|
---|
| 2176 | }*/
|
---|
| 2177 | }
|
---|
| 2178 | }
|
---|
| 2179 |
|
---|
| 2180 | rc += newCost;
|
---|
| 2181 | }
|
---|
| 2182 |
|
---|
| 2183 | return rc / prop;
|
---|
| 2184 | }
|
---|
| 2185 |
|
---|
| 2186 |
|
---|
| 2187 | float OspTree::EvalLeafCost(const OspTraversalData &tData)
|
---|
| 2188 | {
|
---|
| 2189 | KdLeaf *leaf = tData.mNode;
|
---|
| 2190 |
|
---|
| 2191 | float rc = 0;
|
---|
| 2192 | //float prop = mVspTree->GetBoundingBox().GetVolume();
|
---|
| 2193 | //float vol = 0;
|
---|
| 2194 | //ViewCell::NewMail();
|
---|
| 2195 |
|
---|
| 2196 | RayInfoContainer::const_iterator rit, rit_end = tData.mRays->end();
|
---|
| 2197 | ViewCellContainer touchedViewCells;
|
---|
| 2198 |
|
---|
| 2199 | for (rit = tData.mRays->begin(); rit != rit_end; ++ rit)
|
---|
| 2200 | {
|
---|
| 2201 | VssRay *ray = (*rit).mRay;
|
---|
| 2202 |
|
---|
| 2203 | // test if intersection point with one of the objects is inside this node
|
---|
| 2204 |
|
---|
| 2205 | ViewCellContainer viewCells;
|
---|
| 2206 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 2207 |
|
---|
| 2208 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 2209 |
|
---|
| 2210 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2211 | {
|
---|
| 2212 | ViewCell *vc = *vit;
|
---|
| 2213 |
|
---|
| 2214 | // if not previously mailed
|
---|
| 2215 | if (!vc->Mailed())
|
---|
| 2216 | {
|
---|
| 2217 | vc->Mail();
|
---|
| 2218 | touchedViewCells.push_back(vc);
|
---|
| 2219 | }
|
---|
| 2220 | }
|
---|
| 2221 | }
|
---|
| 2222 |
|
---|
| 2223 | // clear pvs of involved view cells
|
---|
| 2224 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 2225 |
|
---|
| 2226 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2227 | {
|
---|
| 2228 | ViewCell *vc = *vit;
|
---|
| 2229 | vc->GetPvs().Clear();
|
---|
| 2230 | }
|
---|
| 2231 |
|
---|
| 2232 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 2233 |
|
---|
| 2234 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 2235 | {
|
---|
| 2236 | Intersectable *obj = *oit;
|
---|
| 2237 |
|
---|
| 2238 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 2239 | {
|
---|
| 2240 | ViewCell *vc = *vit;
|
---|
| 2241 | PvsData *vdata = vc->GetPvs().Find(obj);
|
---|
| 2242 |
|
---|
| 2243 | if (!vdata)
|
---|
| 2244 | {
|
---|
| 2245 | vc->GetPvs().AddSample(obj, 1);
|
---|
| 2246 | rc += vc->GetVolume();
|
---|
| 2247 | //prop += vc->GetVolume();
|
---|
| 2248 | }
|
---|
| 2249 | }
|
---|
| 2250 | }
|
---|
| 2251 |
|
---|
| 2252 | return rc;
|
---|
| 2253 | }
|
---|
| 2254 |
|
---|
| 2255 |
|
---|
| 2256 | bool OspTree::Export(OUT_STREAM &stream)
|
---|
| 2257 | {
|
---|
| 2258 | ExportNode(mRoot, stream);
|
---|
| 2259 |
|
---|
| 2260 | return true;
|
---|
| 2261 | }
|
---|
| 2262 |
|
---|
| 2263 |
|
---|
| 2264 | void OspTree::ExportNode(KdNode *node, OUT_STREAM &stream)
|
---|
| 2265 | {
|
---|
| 2266 | if (node->IsLeaf())
|
---|
| 2267 | {
|
---|
| 2268 | KdLeaf *leaf = dynamic_cast<KdLeaf *>(node);
|
---|
| 2269 |
|
---|
| 2270 | stream << "<Leaf ";
|
---|
| 2271 | stream << "objects=\"";
|
---|
| 2272 |
|
---|
[1286] | 2273 | // export objects in kd leaves
|
---|
[1237] | 2274 | //if (mExportObjects) ExportObjects(leaf, stream);
|
---|
| 2275 |
|
---|
| 2276 | stream << "\" />" << endl;
|
---|
| 2277 | }
|
---|
| 2278 | else
|
---|
| 2279 | {
|
---|
| 2280 | KdInterior *interior = dynamic_cast<KdInterior *>(node);
|
---|
| 2281 |
|
---|
| 2282 | stream << "<Interior plane=\"" << interior->mPosition << " "
|
---|
| 2283 | << interior->mAxis << "\">" << endl;
|
---|
| 2284 |
|
---|
| 2285 | ExportNode(interior->mBack, stream);
|
---|
| 2286 | ExportNode(interior->mFront, stream);
|
---|
| 2287 |
|
---|
| 2288 | stream << "</Interior>" << endl;
|
---|
| 2289 | }
|
---|
| 2290 | }
|
---|
| 2291 |
|
---|
| 2292 |
|
---|
| 2293 | struct KdObjectsTraversalData
|
---|
| 2294 | {
|
---|
| 2295 | KdNode *node;
|
---|
| 2296 | ObjectContainer *objects;
|
---|
| 2297 | };
|
---|
| 2298 |
|
---|
| 2299 |
|
---|
| 2300 | void OspTree::InsertObjects(KdNode *node, const ObjectContainer &objects)
|
---|
| 2301 | {
|
---|
| 2302 | stack<KdObjectsTraversalData> tStack;
|
---|
| 2303 |
|
---|
| 2304 | while (!tStack.empty())
|
---|
| 2305 | {
|
---|
| 2306 | KdObjectsTraversalData tData = tStack.top();
|
---|
| 2307 | tStack.pop();
|
---|
| 2308 |
|
---|
| 2309 | KdNode *node = tData.node;
|
---|
| 2310 |
|
---|
| 2311 | if (node->IsLeaf())
|
---|
| 2312 | {
|
---|
| 2313 | KdLeaf *leaf = dynamic_cast<KdLeaf *>(node);
|
---|
| 2314 |
|
---|
| 2315 | ObjectContainer::const_iterator oit, oit_end = tData.objects->end();
|
---|
| 2316 |
|
---|
| 2317 | for (oit = tData.objects->begin(); oit != oit_end; ++ oit)
|
---|
| 2318 | {
|
---|
| 2319 | leaf->mObjects.push_back(*oit);
|
---|
| 2320 | }
|
---|
| 2321 | }
|
---|
| 2322 | else // interior
|
---|
| 2323 | {
|
---|
| 2324 | KdObjectsTraversalData frontData, backData;
|
---|
| 2325 | KdInterior *interior = dynamic_cast<KdInterior *>(node);
|
---|
| 2326 |
|
---|
| 2327 | frontData.objects = new ObjectContainer();
|
---|
| 2328 | backData.objects = new ObjectContainer();
|
---|
| 2329 |
|
---|
| 2330 | ObjectContainer::const_iterator oit, oit_end = tData.objects->end();
|
---|
| 2331 |
|
---|
| 2332 | for (oit = tData.objects->begin(); oit != oit_end; ++ oit)
|
---|
| 2333 | {
|
---|
| 2334 | Intersectable *object = *oit;
|
---|
| 2335 |
|
---|
| 2336 | // determine the side of this ray with respect to the plane
|
---|
| 2337 | const AxisAlignedBox3 box = object->GetBox();
|
---|
| 2338 |
|
---|
| 2339 | if (box.Max(interior->mAxis) >= interior->mPosition)
|
---|
| 2340 | {
|
---|
| 2341 | frontData.objects->push_back(object);
|
---|
| 2342 | }
|
---|
| 2343 |
|
---|
| 2344 | if (box.Min(interior->mAxis) < interior->mPosition)
|
---|
| 2345 | {
|
---|
| 2346 | backData.objects->push_back(object);
|
---|
| 2347 | }
|
---|
| 2348 | }
|
---|
| 2349 |
|
---|
| 2350 | tStack.push(backData);
|
---|
| 2351 | tStack.push(frontData);
|
---|
| 2352 | }
|
---|
| 2353 |
|
---|
| 2354 | DEL_PTR(tData.objects);
|
---|
| 2355 | }
|
---|
| 2356 | }
|
---|
| 2357 |
|
---|
| 2358 |
|
---|
| 2359 | SubdivisionCandidate * OspTree::PrepareConstruction(const VssRayContainer &sampleRays,
|
---|
[1286] | 2360 | const ObjectContainer &objects,
|
---|
| 2361 | RayInfoContainer &rays)
|
---|
[1237] | 2362 | {
|
---|
| 2363 | // store pointer to this tree
|
---|
| 2364 | OspSubdivisionCandidate::sOspTree = this;
|
---|
| 2365 | mOspStats.nodes = 1;
|
---|
| 2366 |
|
---|
| 2367 | // compute bounding box from objects
|
---|
[1287] | 2368 | ComputeBoundingBox(objects);
|
---|
[1237] | 2369 |
|
---|
| 2370 | mTermMinProbability *= mBoundingBox.GetVolume();
|
---|
| 2371 | mGlobalCostMisses = 0;
|
---|
| 2372 |
|
---|
| 2373 | //-- create new root
|
---|
| 2374 | KdLeaf *kdleaf = new KdLeaf(NULL, 0);
|
---|
| 2375 | kdleaf->mObjects = objects;
|
---|
| 2376 | mRoot = kdleaf;
|
---|
| 2377 |
|
---|
| 2378 | // get clipped rays
|
---|
| 2379 | PreprocessRays(kdleaf, sampleRays, rays);
|
---|
| 2380 |
|
---|
| 2381 | // probabilty is voume of all "seen" view cells
|
---|
| 2382 | #if 1
|
---|
| 2383 | const float prop = EvalViewCellsVolume(kdleaf, rays);
|
---|
| 2384 | #else
|
---|
| 2385 | const float prop = GetBoundingBox().GetVolume();
|
---|
| 2386 | #endif
|
---|
| 2387 |
|
---|
| 2388 | //-- add first candidate for object space partition
|
---|
| 2389 |
|
---|
| 2390 | // create osp traversal data
|
---|
| 2391 | OspTraversalData oData(kdleaf, 0, &rays, 0, prop, mBoundingBox);
|
---|
| 2392 |
|
---|
| 2393 | //-- first split candidate
|
---|
| 2394 | OspSubdivisionCandidate *oSubdivisionCandidate =
|
---|
| 2395 | new OspSubdivisionCandidate(oData);
|
---|
| 2396 |
|
---|
| 2397 | UpdateViewCellsPvs(kdleaf, rays);
|
---|
| 2398 |
|
---|
| 2399 | EvalSubdivisionCandidate(*oSubdivisionCandidate);
|
---|
| 2400 |
|
---|
| 2401 | mTotalCost = (float)objects.size() * prop /
|
---|
| 2402 | mVspTree->GetBoundingBox().GetVolume();
|
---|
| 2403 |
|
---|
| 2404 | EvalSubdivisionStats(*oSubdivisionCandidate);
|
---|
| 2405 |
|
---|
| 2406 | return oSubdivisionCandidate;
|
---|
| 2407 | }
|
---|
| 2408 |
|
---|
| 2409 |
|
---|
[1259] | 2410 | bool OspTree::AddLeafToPvs(KdLeaf *leaf,
|
---|
| 2411 | ViewCell *vc,
|
---|
| 2412 | const float pdf,
|
---|
| 2413 | float &contribution)
|
---|
| 2414 | {
|
---|
| 2415 | // add kd intersecable to pvs
|
---|
| 2416 | KdIntersectable *kdObj = GetOrCreateKdIntersectable(leaf);
|
---|
| 2417 |
|
---|
| 2418 | return vc->AddPvsSample(kdObj, pdf, contribution);
|
---|
| 2419 | }
|
---|
| 2420 |
|
---|
| 2421 |
|
---|
[1237] | 2422 | } |
---|