[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 "BvHierarchy.h"
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| 6 | #include "ViewCell.h"
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| 7 | #include "Plane3.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 "VspTree.h"
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| 19 |
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| 20 |
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| 21 | namespace GtpVisibilityPreprocessor {
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| 22 |
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| 23 |
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| 24 | #define USE_FIXEDPOINT_T 0
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| 25 |
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| 26 | static float debugVol = 0;
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| 27 | int BvhNode::sMailId = 0;
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| 28 | BvHierarchy *BvHierarchy::BvhSubdivisionCandidate::sBvHierarchy = NULL;
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| 29 |
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| 30 |
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| 31 | inline static bool ilt(Intersectable *obj1, Intersectable *obj2)
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| 32 | {
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| 33 | return obj1->mId < obj2->mId;
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| 34 | }
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| 35 |
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| 36 |
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| 37 | /***************************************************************/
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| 38 | /* class BvhNode implementation */
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| 39 | /***************************************************************/
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| 40 |
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| 41 | BvhNode::BvhNode(): mParent(NULL)
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| 42 | {
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| 43 | }
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| 44 |
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| 45 | BvhNode::BvhNode(const AxisAlignedBox3 &bbox):
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| 46 | mBoundingBox(bbox)
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| 47 | {
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| 48 | }
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| 49 |
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| 50 |
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| 51 | BvhNode::BvhNode(const AxisAlignedBox3 &bbox, BvhInterior *parent):
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| 52 | mBoundingBox(bbox), mParent(parent)
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| 53 | {
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| 54 | }
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| 55 |
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| 56 |
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| 57 | bool BvhNode::IsRoot() const
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| 58 | {
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| 59 | return mParent == NULL;
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| 60 | }
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| 61 |
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| 62 |
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| 63 | BvhInterior *BvhNode::GetParent()
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| 64 | {
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| 65 | return mParent;
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| 66 | }
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| 67 |
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| 68 |
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| 69 | void BvhNode::SetParent(BvhInterior *parent)
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| 70 | {
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| 71 | mParent = parent;
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| 72 | }
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| 73 |
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| 74 |
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| 75 |
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| 76 | /******************************************************************/
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| 77 | /* class BvhInterior implementation */
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| 78 | /******************************************************************/
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| 79 |
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| 80 |
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| 81 | BvhLeaf::BvhLeaf(const AxisAlignedBox3 &bbox):
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| 82 | BvhNode(bbox)
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| 83 | {
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| 84 | }
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| 85 |
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| 86 |
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| 87 | BvhLeaf::BvhLeaf(const AxisAlignedBox3 &bbox, BvhInterior *parent):
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| 88 | BvhNode(bbox, parent)
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| 89 | {
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| 90 | }
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| 91 |
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| 92 |
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| 93 | BvhLeaf::BvhLeaf(const AxisAlignedBox3 &bbox, BvhInterior *parent, const int numObjects):
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| 94 | BvhNode(bbox, parent)
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| 95 | {
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| 96 | mObjects.reserve(numObjects);
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| 97 | }
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| 98 |
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| 99 |
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| 100 | bool BvhLeaf::IsLeaf() const
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| 101 | {
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| 102 | return true;
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| 103 | }
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| 104 |
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| 105 |
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| 106 | BvhLeaf::~BvhLeaf()
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| 107 | {
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| 108 | }
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| 109 |
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| 110 |
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| 111 | /******************************************************************/
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| 112 | /* class BvhInterior implementation */
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| 113 | /******************************************************************/
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| 114 |
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| 115 |
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| 116 | BvhInterior::BvhInterior(const AxisAlignedBox3 &bbox):
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| 117 | BvhNode(bbox)
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| 118 | {
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| 119 | }
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| 120 |
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| 121 |
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| 122 | BvhInterior::BvhInterior(const AxisAlignedBox3 &bbox, BvhInterior *parent):
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| 123 | BvhNode(bbox, parent)
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| 124 | {
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| 125 | }
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| 126 |
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| 127 |
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| 128 | void BvhInterior::ReplaceChildLink(BvhNode *oldChild, BvhNode *newChild)
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| 129 | {
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| 130 | if (mBack == oldChild)
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| 131 | mBack = newChild;
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| 132 | else
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| 133 | mFront = newChild;
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| 134 | }
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| 135 |
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| 136 |
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| 137 | bool BvhInterior::IsLeaf() const
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| 138 | {
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| 139 | return false;
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| 140 | }
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| 141 |
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| 142 |
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| 143 | BvhInterior::~BvhInterior()
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| 144 | {
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| 145 | DEL_PTR(mFront);
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| 146 | DEL_PTR(mBack);
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| 147 | }
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| 148 |
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| 149 |
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| 150 | void BvhInterior::SetupChildLinks(BvhNode *front, BvhNode *back)
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| 151 | {
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| 152 | mBack = back;
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| 153 | mFront = front;
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| 154 | }
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| 155 |
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| 156 |
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| 157 |
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| 158 | /*******************************************************************/
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| 159 | /* class BvHierarchy implementation */
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| 160 | /*******************************************************************/
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| 161 |
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| 162 |
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| 163 | BvHierarchy::BvHierarchy():
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| 164 | mRoot(NULL),
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| 165 | mTimeStamp(1)
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| 166 | {
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| 167 | ReadEnvironment();
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| 168 | mSubdivisionCandidates = new vector<SortableEntry>;
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| 169 | }
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| 170 |
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| 171 |
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| 172 | BvHierarchy::~BvHierarchy()
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| 173 | {
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| 174 | // delete kd intersectables
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| 175 | BvhIntersectableMap::iterator it, it_end = mBvhIntersectables.end();
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| 176 |
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| 177 | for (it = mBvhIntersectables.begin(); it != mBvhIntersectables.end(); ++ it)
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| 178 | {
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| 179 | DEL_PTR((*it).second);
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| 180 | }
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| 181 |
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| 182 | DEL_PTR(mSubdivisionCandidates);
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| 183 |
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| 184 | mSubdivisionStats.close();
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| 185 | }
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| 186 |
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| 187 |
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| 188 | void BvHierarchy::ReadEnvironment()
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| 189 | {
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| 190 | bool randomize = false;
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| 191 | Environment::GetSingleton()->GetBoolValue("VspTree.Construction.randomize", randomize);
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| 192 | if (randomize)
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| 193 | Randomize(); // initialise random generator for heuristics
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| 194 |
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| 195 | //-- termination criteria for autopartition
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| 196 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.maxDepth", mTermMaxDepth);
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| 197 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.maxLeaves", mTermMaxLeaves);
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| 198 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.minObjects", mTermMinObjects);
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| 199 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.minProbability", mTermMinVolume);
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| 200 |
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| 201 | Environment::GetSingleton()->GetIntValue("OspTree.Termination.missTolerance", mTermMissTolerance);
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| 202 |
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| 203 | //-- max cost ratio for early tree termination
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| 204 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.maxCostRatio", mTermMaxCostRatio);
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| 205 |
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| 206 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.minGlobalCostRatio",
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| 207 | mTermMinGlobalCostRatio);
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| 208 |
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| 209 |
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| 210 | //-- factors for bsp tree split plane heuristics
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| 211 | Environment::GetSingleton()->GetFloatValue("OspTree.Termination.ct_div_ci", mCtDivCi);
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| 212 |
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| 213 | //-- partition criteria
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| 214 | Environment::GetSingleton()->GetFloatValue("OspTree.Construction.epsilon", mEpsilon);
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| 215 |
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| 216 | // if only the driving axis is used for axis aligned split
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| 217 | Environment::GetSingleton()->GetBoolValue("OspTree.splitUseOnlyDrivingAxis", mOnlyDrivingAxis);
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| 218 | Environment::GetSingleton()->GetFloatValue("OspTree.maxStaticMemory", mMaxMemory);
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| 219 | Environment::GetSingleton()->GetBoolValue("OspTree.useCostHeuristics", mUseCostHeuristics);
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| 220 |
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| 221 |
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| 222 | char subdivisionStatsLog[100];
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| 223 | Environment::GetSingleton()->GetStringValue("OspTree.subdivisionStats", subdivisionStatsLog);
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| 224 | mSubdivisionStats.open(subdivisionStatsLog);
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| 225 |
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| 226 | Environment::GetSingleton()->GetFloatValue("OspTree.Construction.splitBorder", mSplitBorder);
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| 227 | Environment::GetSingleton()->GetFloatValue("OspTree.Construction.renderCostDecreaseWeight", mRenderCostDecreaseWeight);
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| 228 |
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| 229 |
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| 230 | //-- debug output
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| 231 |
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| 232 | Debug << "******* Bvh hierarchy options ******** " << endl;
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| 233 |
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| 234 | Debug << "max depth: " << mTermMaxDepth << endl;
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| 235 | Debug << "min probabiliy: " << mTermMinVolume<< endl;
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| 236 | Debug << "min objects: " << mTermMinObjects << endl;
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| 237 | Debug << "max cost ratio: " << mTermMaxCostRatio << endl;
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| 238 | Debug << "miss tolerance: " << mTermMissTolerance << endl;
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| 239 | Debug << "max leaves: " << mTermMaxLeaves << endl;
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| 240 |
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| 241 | Debug << "randomize: " << randomize << endl;
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| 242 |
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| 243 | Debug << "min global cost ratio: " << mTermMinGlobalCostRatio << endl;
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| 244 | Debug << "global cost miss tolerance: " << mTermGlobalCostMissTolerance << endl;
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| 245 | Debug << "only driving axis: " << mOnlyDrivingAxis << endl;
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| 246 | Debug << "max memory: " << mMaxMemory << endl;
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| 247 | Debug << "use cost heuristics: " << mUseCostHeuristics << endl;
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| 248 | Debug << "subdivision stats log: " << subdivisionStatsLog << endl;
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| 249 |
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| 250 | Debug << "split borders: " << mSplitBorder << endl;
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| 251 | Debug << "render cost decrease weight: " << mRenderCostDecreaseWeight << endl;
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| 252 | Debug << endl;
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| 253 | }
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| 254 |
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| 255 |
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| 256 | void AssociateObjectsWithLeaf(BvhLeaf *leaf)
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| 257 | {
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| 258 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
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| 259 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
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| 260 | {
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| 261 | (*oit)->mBvhLeaf = leaf;
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| 262 | }
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| 263 | }
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| 264 |
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| 265 |
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| 266 | BvhInterior *BvHierarchy::SubdivideNode(const ObjectContainer &frontObjects,
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| 267 | const ObjectContainer &backObjects,
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| 268 | const BvhTraversalData &tData,
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| 269 | BvhTraversalData &frontData,
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| 270 | BvhTraversalData &backData)
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| 271 | {
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| 272 | BvhLeaf *leaf = tData.mNode;
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| 273 |
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| 274 | // two new leaves
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| 275 | mBvhStats.nodes += 2;
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| 276 |
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| 277 | // add the new nodes to the tree
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| 278 | BvhInterior *node = new BvhInterior(tData.mBoundingBox, leaf->GetParent());
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| 279 |
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| 280 |
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| 281 | //-- the front and back traversal data is filled with the new values
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| 282 |
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| 283 | frontData.mDepth = backData.mDepth = tData.mDepth + 1;
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| 284 |
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| 285 | // frontData.mRays = new RayInfoContainer();
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| 286 | // backData.mRays = new RayInfoContainer();
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| 287 |
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| 288 | frontData.mBoundingBox = ComputeBoundingBox(frontObjects);
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| 289 | backData.mBoundingBox = ComputeBoundingBox(backObjects);
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| 290 | //RemoveParentViewCellsPvs(leaf, *tData.mRays);
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| 291 |
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| 292 |
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| 293 | /////////////
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| 294 | //-- create front and back leaf
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| 295 |
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| 296 | BvhLeaf *back = new BvhLeaf(backData.mBoundingBox, node, (int)backObjects.size());
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| 297 | BvhLeaf *front = new BvhLeaf(frontData.mBoundingBox, node, (int)frontObjects.size());
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| 298 |
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| 299 | BvhInterior *parent = leaf->GetParent();
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| 300 |
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| 301 |
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| 302 | // replace a link from node's parent
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| 303 | if (parent)
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| 304 | {
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| 305 | parent->ReplaceChildLink(leaf, node);
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| 306 | node->SetParent(parent);
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| 307 | }
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| 308 | else // new root
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| 309 | {
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| 310 | mRoot = node;
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| 311 | }
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| 312 |
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| 313 | // and setup child links
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| 314 | node->SetupChildLinks(front, back);
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| 315 |
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| 316 | ++ mBvhStats.splits;
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| 317 |
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| 318 | //UpdateViewCellsPvs(front, *frontData.mRays);
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| 319 | //UpdateViewCellsPvs(back, *backData.mRays);
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| 320 |
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| 321 | ////////////////////////////////////
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| 322 |
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| 323 | //ProcessMultipleRefs(front);
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| 324 | //ProcessMultipleRefs(back);
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| 325 |
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| 326 | frontData.mNode = front;
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| 327 | backData.mNode = back;
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| 328 |
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| 329 | back->mObjects = backObjects;
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| 330 | front->mObjects = frontObjects;
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| 331 |
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| 332 | AssociateObjectsWithLeaf(back);
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| 333 | AssociateObjectsWithLeaf(front);
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| 334 |
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| 335 |
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| 336 | // compute probability, i.e., volume of seen view cells
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| 337 | frontData.mVolume = frontData.mBoundingBox.GetVolume();
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| 338 | backData.mVolume = backData.mBoundingBox.GetVolume();
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| 339 |
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| 340 | return node;
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| 341 | }
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| 342 |
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| 343 |
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| 344 | BvhNode *BvHierarchy::Subdivide(SplitQueue &tQueue,
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| 345 | SubdivisionCandidate *splitCandidate,
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| 346 | const bool globalCriteriaMet)
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| 347 | {
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| 348 | BvhSubdivisionCandidate *sc = dynamic_cast<BvhSubdivisionCandidate *>(splitCandidate);
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| 349 | BvhTraversalData &tData = sc->mParentData;
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| 350 |
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| 351 | BvhNode *newNode = tData.mNode;
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| 352 |
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| 353 | if (!LocalTerminationCriteriaMet(tData) && !globalCriteriaMet)
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| 354 | {
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| 355 | BvhTraversalData tFrontData;
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| 356 | BvhTraversalData tBackData;
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| 357 |
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| 358 | //-- continue subdivision
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| 359 |
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| 360 | // create new interior node and two leaf node
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| 361 | newNode = SubdivideNode(sc->mFrontObjects,
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| 362 | sc->mBackObjects,
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| 363 | tData,
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| 364 | tFrontData,
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| 365 | tBackData);
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| 366 |
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| 367 | const int maxCostMisses = sc->mMaxCostMisses;
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| 368 |
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| 369 | // how often was max cost ratio missed in this branch?
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| 370 | tFrontData.mMaxCostMisses = maxCostMisses;
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| 371 | tBackData.mMaxCostMisses = maxCostMisses;
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| 372 |
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| 373 | mTotalCost -= sc->GetRenderCostDecrease();
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| 374 |
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| 375 | // subdivision statistics
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| 376 | if (1) EvalSubdivisionStats(*sc);
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| 377 |
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| 378 | //-- push the new split candidates on the queue
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| 379 |
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| 380 | BvhSubdivisionCandidate *frontCandidate = new BvhSubdivisionCandidate(tFrontData);
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| 381 | BvhSubdivisionCandidate *backCandidate = new BvhSubdivisionCandidate(tBackData);
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| 382 |
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| 383 | EvalSubdivisionCandidate(*frontCandidate);
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| 384 | EvalSubdivisionCandidate(*backCandidate);
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| 385 |
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| 386 | tQueue.Push(frontCandidate);
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| 387 | tQueue.Push(backCandidate);
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| 388 |
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| 389 | // delete old leaf node
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| 390 | DEL_PTR(tData.mNode);
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| 391 | }
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| 392 |
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| 393 |
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| 394 | //-- terminate traversal
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| 395 | if (newNode->IsLeaf())
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| 396 | {
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| 397 | EvaluateLeafStats(tData);
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| 398 |
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| 399 | const bool mStoreRays= true;
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| 400 |
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| 401 | //-- store additional info
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| 402 | if (mStoreRays)
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| 403 | {
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| 404 | BvhLeaf *leaf = dynamic_cast<BvhLeaf *>(newNode);
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| 405 | CollectRays(leaf->mObjects, leaf->mVssRays);
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| 406 | }
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| 407 | }
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| 408 |
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| 409 | //-- cleanup
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| 410 | tData.Clear();
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| 411 |
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| 412 | return newNode;
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| 413 | }
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| 414 |
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| 415 |
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| 416 | void BvHierarchy::EvalSubdivisionCandidate(BvhSubdivisionCandidate &splitCandidate)
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| 417 | {
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| 418 | ObjectContainer frontObjects, backObjects;
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| 419 |
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| 420 | // compute best object partition
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| 421 | const float ratio =
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| 422 | SelectObjectPartition(splitCandidate.mParentData, frontObjects, backObjects);
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| 423 |
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| 424 | const bool success = ratio < mTermMaxCostRatio;
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| 425 |
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| 426 | float oldRenderCost;
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| 427 |
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| 428 | // compute global decrease in render cost
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| 429 | const float renderCostDecr = EvalRenderCostDecrease(frontObjects,
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| 430 | backObjects,
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| 431 | splitCandidate.mParentData,
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| 432 | oldRenderCost);
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| 433 |
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| 434 | splitCandidate.SetRenderCostDecrease(renderCostDecr);
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| 435 |
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| 436 | #if 0
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| 437 | const float priority = (float)-data.mDepth;
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| 438 | #else
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| 439 | // take render cost of node into account
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| 440 | // otherwise danger of being stuck in a local minimum!!
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| 441 | const float factor = mRenderCostDecreaseWeight;
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| 442 | const float priority = factor * renderCostDecr + (1.0f - factor) * oldRenderCost;
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| 443 |
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| 444 | #endif
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| 445 |
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| 446 | // compute global decrease in render cost
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| 447 | splitCandidate.SetPriority(priority);
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| 448 |
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| 449 | splitCandidate.mMaxCostMisses =
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| 450 | success ? splitCandidate.mParentData.mMaxCostMisses :
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| 451 | splitCandidate.mParentData.mMaxCostMisses + 1;
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| 452 | }
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| 453 |
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| 454 |
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[1251] | 455 | inline bool BvHierarchy::LocalTerminationCriteriaMet(const BvhTraversalData &data) const
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[1237] | 456 | {
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| 457 | // matt: TODO
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| 458 | return (
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| 459 | //(data.mNode->mObjects.size() < mTermMinObjects) ||
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| 460 | //(data.mProbability <= mTermMinProbability) ||
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| 461 | (data.mDepth >= mTermMaxDepth)
|
---|
| 462 | );
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 |
|
---|
[1251] | 466 | inline bool BvHierarchy::GlobalTerminationCriteriaMet(const BvhTraversalData &data) const
|
---|
[1237] | 467 | {
|
---|
| 468 | // matt: TODO
|
---|
| 469 | return (
|
---|
| 470 | (mBvhStats.Leaves() >= mTermMaxLeaves)
|
---|
| 471 | //mOutOfMemory ||
|
---|
| 472 | //(mGlobalCostMisses >= mTermGlobalCostMissTolerance)
|
---|
| 473 | );
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 |
|
---|
| 477 | void BvHierarchy::EvaluateLeafStats(const BvhTraversalData &data)
|
---|
| 478 | {
|
---|
| 479 | // the node became a leaf -> evaluate stats for leafs
|
---|
| 480 | BvhLeaf *leaf = data.mNode;
|
---|
| 481 |
|
---|
| 482 | ++ mCreatedLeaves;
|
---|
| 483 |
|
---|
| 484 | if (data.mDepth >= mTermMaxDepth)
|
---|
| 485 | {
|
---|
| 486 | ++ mBvhStats.maxDepthNodes;
|
---|
| 487 | //Debug << "new max depth: " << mVspStats.maxDepthNodes << endl;
|
---|
| 488 | }
|
---|
| 489 |
|
---|
| 490 | if (data.mVolume <= mTermMinVolume)
|
---|
| 491 | ++ mBvhStats.minProbabilityNodes;
|
---|
| 492 |
|
---|
| 493 | // accumulate depth to compute average depth
|
---|
| 494 | mBvhStats.accumDepth += data.mDepth;
|
---|
| 495 |
|
---|
| 496 | // if ((int)(leaf->mObjects.size()) < mTermMinCost)
|
---|
| 497 | // ++ mOspStats.minCostNodes;
|
---|
| 498 |
|
---|
| 499 | if ((int)(leaf->mObjects.size()) > mBvhStats.maxObjectRefs)
|
---|
| 500 | mBvhStats.maxObjectRefs = (int)leaf->mObjects.size();
|
---|
[1272] | 501 |
|
---|
[1237] | 502 | }
|
---|
| 503 |
|
---|
| 504 |
|
---|
| 505 | float BvHierarchy::EvalLocalCostHeuristics(const BvhTraversalData &tData,
|
---|
| 506 | const int axis,
|
---|
| 507 | ObjectContainer &objectsFront,
|
---|
| 508 | ObjectContainer &objectsBack)
|
---|
| 509 | {
|
---|
| 510 | // the relative cost ratio
|
---|
| 511 | float ratio = 99999999.0f;
|
---|
| 512 |
|
---|
| 513 | // go through the lists, count the number of objects left and right
|
---|
| 514 | // and evaluate the following cost funcion:
|
---|
| 515 | // C = ct_div_ci + (ol + or)/queries
|
---|
| 516 |
|
---|
| 517 | const float minBox = tData.mBoundingBox.Min(axis);
|
---|
| 518 | const float maxBox = tData.mBoundingBox.Max(axis);
|
---|
| 519 |
|
---|
| 520 | const float sizeBox = maxBox - minBox;
|
---|
| 521 |
|
---|
| 522 | float minBand = minBox + mSplitBorder * (maxBox - minBox);
|
---|
| 523 | float maxBand = minBox + (1.0f - mSplitBorder) * (maxBox - minBox);
|
---|
| 524 |
|
---|
| 525 | //-- sort so we can use a sweep
|
---|
| 526 | SortSubdivisionCandidates(tData, axis, minBand, maxBand);
|
---|
| 527 |
|
---|
| 528 | float totalVol = PrepareHeuristics(tData);
|
---|
| 529 | float voll = 0;
|
---|
| 530 | float volr = totalVol;
|
---|
| 531 |
|
---|
| 532 | /// this is kind of a reverse pvs
|
---|
| 533 | const int totalObjects = (int)tData.mNode->mObjects.size();
|
---|
| 534 |
|
---|
| 535 | int objectsl = 0;
|
---|
| 536 | int objectsr = totalObjects;
|
---|
| 537 |
|
---|
| 538 | float sum = (float)totalVol * objectsr;
|
---|
| 539 |
|
---|
| 540 |
|
---|
| 541 | bool splitPlaneFound = false;
|
---|
| 542 |
|
---|
| 543 | /////////////////////////////////
|
---|
| 544 | // the parameters for the current optimum
|
---|
| 545 |
|
---|
| 546 | float volBack = voll;
|
---|
| 547 | float volFront = volr;
|
---|
| 548 |
|
---|
| 549 | int nObjectsBack = objectsl;
|
---|
| 550 | int nObjectsFront = objectsr;
|
---|
| 551 |
|
---|
| 552 | float minSum = 1e20f;
|
---|
| 553 |
|
---|
| 554 | /////////////////////////////
|
---|
| 555 |
|
---|
| 556 | debugVol = 0;
|
---|
| 557 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
| 558 |
|
---|
| 559 | /////////////////////////////
|
---|
| 560 | // the sweep heuristics
|
---|
| 561 |
|
---|
| 562 | // mail the objects on the left side
|
---|
| 563 | Intersectable::NewMail();
|
---|
| 564 |
|
---|
| 565 | //-- traverse through events and find best split plane
|
---|
| 566 | vector<SortableEntry>::const_iterator ci, ci_end = mSubdivisionCandidates->end();
|
---|
| 567 |
|
---|
| 568 | for (ci = mSubdivisionCandidates->begin(); ci != ci_end; ++ ci)
|
---|
| 569 | {
|
---|
| 570 | Intersectable *object = (*ci).mObject;
|
---|
| 571 |
|
---|
| 572 | EvalHeuristicsContribution(tData.mNode, *ci, voll, volr, objectsl);
|
---|
| 573 | objectsr = totalObjects - objectsl;
|
---|
| 574 |
|
---|
| 575 | // Note: sufficient to compare size of bounding boxes of front and back side?
|
---|
| 576 |
|
---|
| 577 | if (((*ci).mPos >= minBand) && ((*ci).mPos <= maxBand))
|
---|
| 578 | {
|
---|
| 579 | // voll = view cells that see only left node (i.e., left pvs)
|
---|
| 580 | // volr = view cells that see only right node (i.e., right pvs)
|
---|
| 581 | // rest = view cells that see both nodes (i.e., total pvs)
|
---|
| 582 | sum = voll * objectsl + volr * objectsr + (totalVol - voll - volr) * totalObjects;
|
---|
| 583 |
|
---|
| 584 | float currentPos;
|
---|
| 585 |
|
---|
| 586 | // HACK: current positition is BETWEEN visibility events
|
---|
| 587 | if (1 && ((ci + 1) != ci_end))
|
---|
| 588 | currentPos = ((*ci).mPos + (*(ci + 1)).mPos) * 0.5f;
|
---|
| 589 | else
|
---|
| 590 | currentPos = (*ci).mPos;
|
---|
| 591 |
|
---|
| 592 | if ((totalVol - voll - volr - debugVol) / viewSpaceVol > 0.0001)
|
---|
| 593 | Debug << "front and back volume: " << (totalVol - voll - volr) / viewSpaceVol << " error: " << (totalVol - voll - volr - debugVol) / viewSpaceVol << endl;
|
---|
| 594 | #if 0
|
---|
| 595 | Debug << "pos: " << currentPos
|
---|
| 596 | << "\t (pvsl: " << pvsl << ", pvsr: " << pvsr << ")"
|
---|
| 597 | << "\t (voll: " << voll << ", volr: " << volr << ")"
|
---|
| 598 | << "\t (vcl: " << vcl << ", vcr: " << vcr << ", nvc: " << numViewCells << ")"
|
---|
| 599 | << "\t sum: " << sum << endl;
|
---|
| 600 |
|
---|
| 601 | #endif
|
---|
| 602 | if (sum < minSum)
|
---|
| 603 | {
|
---|
| 604 | splitPlaneFound = true;
|
---|
| 605 |
|
---|
| 606 | minSum = sum;
|
---|
| 607 |
|
---|
| 608 | nObjectsBack = objectsl;
|
---|
| 609 | nObjectsFront = objectsr;
|
---|
| 610 |
|
---|
| 611 | volBack = voll;
|
---|
| 612 | volFront = volr;
|
---|
| 613 | }
|
---|
| 614 | }
|
---|
| 615 | }
|
---|
| 616 |
|
---|
| 617 | //-- compute cost
|
---|
| 618 | const float frontAndBackVol = totalVol - volFront - volBack;
|
---|
| 619 |
|
---|
| 620 | const float oldRenderCost = (float)totalObjects * totalVol + Limits::Small;
|
---|
| 621 | const float newRenderCost = (float)nObjectsFront * volFront +
|
---|
| 622 | (float)nObjectsBack * volBack +
|
---|
| 623 | (float)totalObjects * frontAndBackVol;
|
---|
| 624 |
|
---|
| 625 | if (splitPlaneFound)
|
---|
| 626 | {
|
---|
| 627 | ratio = newRenderCost / oldRenderCost;
|
---|
| 628 | }
|
---|
| 629 |
|
---|
| 630 | //Debug << "axis=" << axis << " costRatio=" << ratio << " pos="
|
---|
| 631 | // << position << " t=" << (position - minBox) / (maxBox - minBox)
|
---|
| 632 | // << "\t pb=(" << volBack << ")\t pf=(" << volFront << ")" << endl;
|
---|
| 633 |
|
---|
| 634 | Debug << "\n§§§§ eval local cost §§§§" << endl
|
---|
| 635 | << "back pvs: " << nObjectsBack << " front pvs: " << nObjectsFront << " total pvs: " << totalObjects << endl
|
---|
| 636 | << "back p: " << volBack / viewSpaceVol << " front p " << volFront / viewSpaceVol << " p: " << totalVol / viewSpaceVol << endl
|
---|
| 637 | << "old rc: " << oldRenderCost / viewSpaceVol << " new rc: " << newRenderCost / viewSpaceVol << endl
|
---|
| 638 | << "render cost decrease: " << oldRenderCost / viewSpaceVol - newRenderCost / viewSpaceVol << endl;
|
---|
| 639 |
|
---|
| 640 | if (oldRenderCost < newRenderCost)
|
---|
| 641 | Debug << "\nwarning!!:\n" << "old rc: " << oldRenderCost * viewSpaceVol << " new rc: " << newRenderCost * viewSpaceVol << endl;
|
---|
| 642 |
|
---|
| 643 | // assign objects
|
---|
| 644 | ObjectContainer::const_iterator oit, oit_end = tData.mNode->mObjects.end();
|
---|
| 645 |
|
---|
| 646 | for (oit = tData.mNode->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 647 | {
|
---|
| 648 | Intersectable *obj = *oit;
|
---|
| 649 |
|
---|
| 650 | if (obj->Mailed()) // belongs to back objects
|
---|
| 651 | objectsBack.push_back(obj);
|
---|
| 652 | else
|
---|
| 653 | objectsFront.push_back(obj);
|
---|
| 654 | }
|
---|
| 655 |
|
---|
| 656 | return ratio;
|
---|
| 657 | }
|
---|
| 658 |
|
---|
| 659 |
|
---|
| 660 | void BvHierarchy::SortSubdivisionCandidates(const BvhTraversalData &tData,
|
---|
| 661 | const int axis,
|
---|
| 662 | float minBand,
|
---|
| 663 | float maxBand)
|
---|
| 664 |
|
---|
| 665 | {
|
---|
| 666 | mSubdivisionCandidates->clear();
|
---|
| 667 |
|
---|
| 668 | //RayInfoContainer *rays = tData.mRays;
|
---|
| 669 | BvhLeaf *leaf = tData.mNode;
|
---|
| 670 |
|
---|
| 671 | // compute requested size
|
---|
| 672 | int requestedSize = 0;
|
---|
| 673 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 674 | for (oit = leaf->mObjects.begin(); oit < oit_end; ++ oit)
|
---|
| 675 | requestedSize += 2 + (int)(*oit)->mVssRays.size() * 2;
|
---|
| 676 |
|
---|
| 677 | // creates a sorted split candidates array
|
---|
| 678 | if (mSubdivisionCandidates->capacity() > 500000 &&
|
---|
| 679 | requestedSize < (int)(mSubdivisionCandidates->capacity() / 10) )
|
---|
| 680 | {
|
---|
| 681 | delete mSubdivisionCandidates;
|
---|
| 682 | mSubdivisionCandidates = new vector<SortableEntry>;
|
---|
| 683 | }
|
---|
| 684 |
|
---|
| 685 | mSubdivisionCandidates->reserve(requestedSize);
|
---|
| 686 |
|
---|
| 687 | float pos;
|
---|
| 688 |
|
---|
| 689 | //-- insert object queries
|
---|
| 690 | //-- These queries can induce a change in pvs size.
|
---|
| 691 | //-- Note that they cannot induce a change in view cell volume, as
|
---|
| 692 | //-- there is no ray associated with these events!!
|
---|
| 693 |
|
---|
| 694 | for (oit = leaf->mObjects.begin(); oit < oit_end; ++ oit)
|
---|
| 695 | {
|
---|
| 696 | Intersectable *obj = *oit;
|
---|
| 697 |
|
---|
| 698 | Intersectable *object = *oit;
|
---|
| 699 | const AxisAlignedBox3 box = object->GetBox();
|
---|
| 700 |
|
---|
| 701 | mSubdivisionCandidates->push_back(
|
---|
| 702 | SortableEntry(SortableEntry::OBJECT,
|
---|
| 703 | box.Min(axis),
|
---|
| 704 | object,
|
---|
| 705 | NULL)
|
---|
| 706 | );
|
---|
| 707 |
|
---|
| 708 |
|
---|
| 709 | //-- insert ray queries
|
---|
| 710 | //-- we are intersested only in rays which intersect an object that
|
---|
| 711 | //-- is part of the kd node because they can induce a change in view cell
|
---|
| 712 | //-- volume on the left and the right part.
|
---|
| 713 | //-- Note that they cannot induce a change in pvs size!!
|
---|
| 714 |
|
---|
| 715 | VssRayContainer::const_iterator rit, rit_end = obj->mVssRays.end();
|
---|
| 716 |
|
---|
| 717 | for (rit = obj->mVssRays.begin(); rit < rit_end; ++ rit)
|
---|
| 718 | {
|
---|
| 719 | VssRay *ray = (*rit);
|
---|
| 720 | const bool positive = ray->HasPosDir(axis);
|
---|
| 721 |
|
---|
| 722 | pos = ray->mTermination[axis];
|
---|
| 723 |
|
---|
| 724 | mSubdivisionCandidates->push_back(
|
---|
| 725 | SortableEntry(SortableEntry::VIEWCELLS,
|
---|
| 726 | pos,
|
---|
| 727 | ray->mTerminationObject,
|
---|
| 728 | ray)
|
---|
| 729 | );
|
---|
| 730 | }
|
---|
| 731 | }
|
---|
| 732 |
|
---|
| 733 | stable_sort(mSubdivisionCandidates->begin(), mSubdivisionCandidates->end());
|
---|
| 734 | }
|
---|
| 735 |
|
---|
| 736 |
|
---|
| 737 | const BvhStatistics &BvHierarchy::GetStatistics() const
|
---|
| 738 | {
|
---|
| 739 | return mBvhStats;
|
---|
| 740 | }
|
---|
| 741 |
|
---|
| 742 |
|
---|
| 743 | void BvHierarchy::EvalRayContribution(const VssRay &ray,
|
---|
| 744 | float &volLeft,
|
---|
| 745 | float &volRight)
|
---|
| 746 | {
|
---|
| 747 | ViewCellContainer viewCells;
|
---|
| 748 | mVspTree->GetViewCells(ray, viewCells);
|
---|
| 749 |
|
---|
| 750 | /// classify view cells and compute volume contri accordingly
|
---|
| 751 | /// possible view cell classifications:
|
---|
| 752 | /// view cell mailed => view cell can be seen from left child node
|
---|
| 753 | /// view cell counter > 0 view cell can be seen from right child node
|
---|
| 754 | /// combined: view cell volume belongs to both nodes
|
---|
| 755 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 756 |
|
---|
| 757 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 758 | {
|
---|
| 759 | // view cells can also be seen from left child node
|
---|
| 760 | ViewCell *viewCell = *vit;
|
---|
| 761 |
|
---|
| 762 | const float vol = viewCell->GetVolume();
|
---|
| 763 |
|
---|
| 764 | if (!viewCell->Mailed())
|
---|
| 765 | {
|
---|
| 766 | viewCell->Mail();
|
---|
| 767 |
|
---|
| 768 | // we now see view cell from both nodes
|
---|
| 769 | // => remove ref to right child node
|
---|
| 770 | volRight -= vol;
|
---|
| 771 | debugVol += vol;
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 | // last reference into the right node
|
---|
| 775 | if (-- viewCell->mCounter == 0)
|
---|
| 776 | {
|
---|
| 777 | // view cell was previously seen from both nodes =>
|
---|
| 778 | // contributes only to left node now
|
---|
| 779 | volLeft += vol;
|
---|
| 780 | debugVol -= vol;
|
---|
| 781 | }
|
---|
| 782 | }
|
---|
| 783 | }
|
---|
| 784 |
|
---|
| 785 |
|
---|
| 786 | float BvHierarchy::PrepareHeuristics(const VssRay &ray)
|
---|
| 787 | {
|
---|
| 788 | float vol = 0;
|
---|
| 789 |
|
---|
| 790 | ViewCellContainer viewCells;
|
---|
| 791 | mVspTree->GetViewCells(ray, viewCells);
|
---|
| 792 |
|
---|
| 793 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 794 |
|
---|
| 795 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 796 | {
|
---|
| 797 | ViewCell *vc = (*vit);
|
---|
| 798 |
|
---|
| 799 | if (!vc->Mailed())
|
---|
| 800 | {
|
---|
| 801 | //Debug << "single vol: "<< vc->GetVolume() << endl;
|
---|
| 802 | vc->Mail();
|
---|
| 803 | vc->mCounter = 0;
|
---|
| 804 | vol += vc->GetVolume();
|
---|
| 805 | }
|
---|
| 806 |
|
---|
| 807 | // view cell volume already added => just increase counter
|
---|
| 808 | ++ vc->mCounter;
|
---|
| 809 | }
|
---|
| 810 |
|
---|
| 811 | return vol;
|
---|
| 812 | }
|
---|
| 813 |
|
---|
| 814 |
|
---|
| 815 | float BvHierarchy::PrepareHeuristics(const BvhTraversalData &tData)
|
---|
| 816 | {
|
---|
| 817 | float vol = 0;
|
---|
| 818 | debugVol = 0;
|
---|
| 819 |
|
---|
| 820 | ViewCell::NewMail();
|
---|
| 821 |
|
---|
| 822 | BvhLeaf *leaf = tData.mNode;
|
---|
| 823 |
|
---|
| 824 | VssRayContainer rays;
|
---|
| 825 | CollectRays(leaf->mObjects, rays);
|
---|
| 826 |
|
---|
| 827 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 828 |
|
---|
| 829 | for (rit = rays.begin(); rit < rit_end; ++ rit)
|
---|
| 830 | {
|
---|
| 831 | VssRay *ray = (*rit);
|
---|
| 832 |
|
---|
| 833 | const float volContri = PrepareHeuristics(*ray);
|
---|
| 834 |
|
---|
| 835 | // if hitpoint with one of the objects is inside this node, we
|
---|
| 836 | // evaluate the volume of the view cells seen by this ray
|
---|
| 837 | if (ray->mTerminationObject)
|
---|
| 838 | {
|
---|
| 839 | vol += volContri;
|
---|
| 840 | }
|
---|
| 841 |
|
---|
| 842 | // count double if both hit points are within the kd node
|
---|
| 843 | if (0 && ray->mOriginObject)
|
---|
| 844 | {
|
---|
| 845 | vol += volContri;
|
---|
| 846 | }
|
---|
| 847 | }
|
---|
| 848 |
|
---|
| 849 | return vol;
|
---|
| 850 | }
|
---|
| 851 | ///////////////////////////////////////////////////////////
|
---|
| 852 |
|
---|
| 853 |
|
---|
| 854 | void BvHierarchy::EvalHeuristicsContribution(BvhLeaf *leaf,
|
---|
| 855 | const SortableEntry &ci,
|
---|
| 856 | float &volLeft,
|
---|
| 857 | float &volRight,
|
---|
| 858 | int &objectsLeft)
|
---|
| 859 | {
|
---|
| 860 | Intersectable *obj = ci.mObject;
|
---|
| 861 | VssRay *ray = ci.mRay;
|
---|
| 862 |
|
---|
| 863 | // switch between different types of events
|
---|
| 864 | switch (ci.mType)
|
---|
| 865 | {
|
---|
| 866 | case SortableEntry::OBJECT:
|
---|
| 867 | cout << "o";
|
---|
| 868 | ci.mObject->Mail();
|
---|
| 869 | ++ objectsLeft;
|
---|
| 870 | break;
|
---|
| 871 |
|
---|
| 872 | // compute volume contribution from view cells
|
---|
| 873 | case SortableEntry::VIEWCELLS:
|
---|
| 874 | cout << "v";
|
---|
| 875 | // process ray if the hit point with termination / origin object
|
---|
| 876 | // is inside this kd leaf
|
---|
| 877 | EvalRayContribution(*ray, volLeft, volRight);
|
---|
| 878 | break;
|
---|
| 879 |
|
---|
| 880 | default:
|
---|
| 881 | cout << "should not come here" << endl;
|
---|
| 882 | break;
|
---|
| 883 | }
|
---|
| 884 | //cout << "vol left: " << volLeft << " vol right " << volRight << endl;
|
---|
| 885 | }
|
---|
| 886 |
|
---|
| 887 |
|
---|
| 888 | void BvHierarchy::SetViewCellsManager(ViewCellsManager *vcm)
|
---|
| 889 | {
|
---|
| 890 | mViewCellsManager = vcm;
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 |
|
---|
| 894 | AxisAlignedBox3 BvHierarchy::GetBoundingBox() const
|
---|
| 895 | {
|
---|
| 896 | return mBoundingBox;
|
---|
| 897 | }
|
---|
| 898 |
|
---|
| 899 |
|
---|
| 900 | float BvHierarchy::SelectObjectPartition(const BvhTraversalData &tData,
|
---|
| 901 | ObjectContainer &frontObjects,
|
---|
| 902 | ObjectContainer &backObjects)
|
---|
| 903 | {
|
---|
| 904 | ObjectContainer nFrontObjects[3];
|
---|
| 905 | ObjectContainer nBackObjects[3];
|
---|
| 906 |
|
---|
| 907 | float nCostRatio[3];
|
---|
| 908 |
|
---|
| 909 | // create bounding box of node geometry
|
---|
| 910 | AxisAlignedBox3 box = tData.mBoundingBox;
|
---|
| 911 |
|
---|
| 912 | int sAxis = 0;
|
---|
| 913 | int bestAxis = -1;
|
---|
| 914 |
|
---|
| 915 | if (mOnlyDrivingAxis)
|
---|
| 916 | {
|
---|
| 917 | sAxis = box.Size().DrivingAxis();
|
---|
| 918 | }
|
---|
| 919 |
|
---|
| 920 | // -- evaluate split cost for all three axis
|
---|
| 921 |
|
---|
| 922 | for (int axis = 0; axis < 3; ++ axis)
|
---|
| 923 | {
|
---|
| 924 | if (!mOnlyDrivingAxis || (axis == sAxis))
|
---|
| 925 | {
|
---|
| 926 | if (1 || mUseCostHeuristics)
|
---|
| 927 | {
|
---|
| 928 | //-- partition objects using heuristics
|
---|
| 929 |
|
---|
| 930 | nCostRatio[axis] =
|
---|
| 931 | EvalLocalCostHeuristics(
|
---|
| 932 | tData,
|
---|
| 933 | axis,
|
---|
| 934 | nFrontObjects[axis],
|
---|
| 935 | nBackObjects[axis]);
|
---|
| 936 | }
|
---|
| 937 | if (bestAxis == -1)
|
---|
| 938 | {
|
---|
| 939 | bestAxis = axis;
|
---|
| 940 | }
|
---|
| 941 | else if (nCostRatio[axis] < nCostRatio[bestAxis])
|
---|
| 942 | {
|
---|
| 943 | bestAxis = axis;
|
---|
| 944 | }
|
---|
| 945 | }
|
---|
| 946 | }
|
---|
| 947 |
|
---|
| 948 | //-- assign values
|
---|
| 949 |
|
---|
| 950 | frontObjects = nFrontObjects[bestAxis];
|
---|
| 951 | backObjects = nFrontObjects[bestAxis];
|
---|
| 952 |
|
---|
| 953 | Debug << "val: " << nCostRatio[bestAxis] << " axis: " << bestAxis << endl;
|
---|
| 954 | return nCostRatio[bestAxis];
|
---|
| 955 | }
|
---|
| 956 |
|
---|
| 957 |
|
---|
| 958 | void BvHierarchy::AssociateObjectsWithRays(const VssRayContainer &rays)
|
---|
| 959 | {
|
---|
| 960 |
|
---|
| 961 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 962 |
|
---|
| 963 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
| 964 | {
|
---|
| 965 | VssRay *ray = (*rit);
|
---|
| 966 |
|
---|
| 967 | if (ray->mTerminationObject)
|
---|
| 968 | {
|
---|
| 969 | ray->mTerminationObject->mVssRays.push_back(ray);
|
---|
| 970 | }
|
---|
| 971 |
|
---|
| 972 | if (0 && ray->mOriginObject)
|
---|
| 973 | {
|
---|
| 974 | ray->mOriginObject->mVssRays.push_back(ray);
|
---|
| 975 | }
|
---|
| 976 | }
|
---|
| 977 | }
|
---|
| 978 |
|
---|
| 979 |
|
---|
| 980 | void BvHierarchy::EvalSubdivisionStats(const SubdivisionCandidate &sc)
|
---|
| 981 | {
|
---|
| 982 | const float costDecr = sc.GetRenderCostDecrease();
|
---|
| 983 |
|
---|
| 984 | AddSubdivisionStats(mBvhStats.Leaves(),
|
---|
| 985 | costDecr,
|
---|
| 986 | mTotalCost
|
---|
| 987 | );
|
---|
| 988 | }
|
---|
| 989 |
|
---|
| 990 |
|
---|
| 991 | void BvHierarchy::AddSubdivisionStats(const int leaves,
|
---|
| 992 | const float renderCostDecr,
|
---|
| 993 | const float totalRenderCost)
|
---|
| 994 | {
|
---|
| 995 | mSubdivisionStats
|
---|
| 996 | << "#Leaves\n" << leaves << endl
|
---|
| 997 | << "#RenderCostDecrease\n" << renderCostDecr << endl
|
---|
| 998 | << "#TotalRenderCost\n" << totalRenderCost << endl;
|
---|
| 999 | //<< "#AvgRenderCost\n" << avgRenderCost << endl;
|
---|
| 1000 | }
|
---|
| 1001 |
|
---|
| 1002 |
|
---|
| 1003 | void BvHierarchy::CollectRays(const ObjectContainer &objects,
|
---|
| 1004 | VssRayContainer &rays) const
|
---|
| 1005 | {
|
---|
| 1006 | VssRay::NewMail();
|
---|
| 1007 |
|
---|
| 1008 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
| 1009 |
|
---|
| 1010 | // evaluate reverse pvs and view cell volume on left and right cell
|
---|
| 1011 | // note: should I take all leaf objects or rather the objects hit by rays?
|
---|
| 1012 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
| 1013 | {
|
---|
| 1014 | Intersectable *obj = *oit;
|
---|
| 1015 |
|
---|
| 1016 | VssRayContainer::const_iterator rit, rit_end = obj->mVssRays.end();
|
---|
| 1017 |
|
---|
| 1018 | for (rit = obj->mVssRays.begin(); rit < rit_end; ++ rit)
|
---|
| 1019 | {
|
---|
| 1020 | VssRay *ray = (*rit);
|
---|
| 1021 |
|
---|
| 1022 | if (!ray->Mailed())
|
---|
| 1023 | {
|
---|
| 1024 | ray->Mail();
|
---|
| 1025 | rays.push_back(ray);
|
---|
| 1026 | }
|
---|
| 1027 | }
|
---|
| 1028 | }
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 |
|
---|
| 1032 | void BvHierarchy::MailViewCells(const ObjectContainer &objects,
|
---|
| 1033 | const bool isFront,
|
---|
| 1034 | ViewCellContainer &collectedViewCells) const
|
---|
| 1035 | {
|
---|
| 1036 | VssRayContainer rays;
|
---|
| 1037 | CollectRays(objects, rays);
|
---|
| 1038 |
|
---|
| 1039 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1040 |
|
---|
| 1041 | for (rit = rays.begin(); rit < rit_end; ++ rit)
|
---|
| 1042 | {
|
---|
| 1043 | VssRay *ray = (*rit);
|
---|
| 1044 |
|
---|
| 1045 | // view cell is assigned to left and / or right child
|
---|
| 1046 | ViewCellContainer viewCells;
|
---|
| 1047 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 1048 |
|
---|
| 1049 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 1050 |
|
---|
| 1051 | // mail view cell
|
---|
| 1052 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1053 | {
|
---|
| 1054 | ViewCell *vc = *vit;
|
---|
| 1055 |
|
---|
| 1056 | if (!vc->Mailed() && !vc->Mailed(1) && !vc->Mailed(2))
|
---|
| 1057 | collectedViewCells.push_back(vc);
|
---|
| 1058 |
|
---|
| 1059 | if (isFront)
|
---|
| 1060 | {
|
---|
| 1061 | if (!vc->Mailed())
|
---|
| 1062 | vc->Mail();
|
---|
| 1063 | }
|
---|
| 1064 | else
|
---|
| 1065 | {
|
---|
| 1066 | if (!vc->Mailed())
|
---|
| 1067 | vc->Mail(1);
|
---|
| 1068 | else
|
---|
| 1069 | vc->Mail(2);
|
---|
| 1070 | }
|
---|
| 1071 | }
|
---|
| 1072 | }
|
---|
| 1073 | }
|
---|
| 1074 |
|
---|
| 1075 |
|
---|
| 1076 | float BvHierarchy::EvalRenderCostDecrease(const ObjectContainer &objectsFront,
|
---|
| 1077 | const ObjectContainer &objectsBack,
|
---|
| 1078 | const BvhTraversalData &tData,
|
---|
| 1079 | float &normalizedOldRenderCost) const
|
---|
| 1080 | {
|
---|
| 1081 | // probability that view point lies in back / front node
|
---|
| 1082 | float pOverall = 0;
|
---|
| 1083 | float pFront = 0;
|
---|
| 1084 | float pBack = 0;
|
---|
| 1085 | float pFrontAndBack = 0;
|
---|
| 1086 |
|
---|
| 1087 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
| 1088 |
|
---|
| 1089 | BvhLeaf *leaf = tData.mNode;
|
---|
| 1090 |
|
---|
| 1091 | // sum up volume seen from the objects of left and right children
|
---|
| 1092 | // => the volume is the weight for the render cost equation
|
---|
| 1093 | ViewCell::NewMail(3);
|
---|
| 1094 |
|
---|
| 1095 | ViewCellContainer collectedViewCells;
|
---|
| 1096 | MailViewCells(objectsFront, true, collectedViewCells);
|
---|
| 1097 | MailViewCells(objectsBack, false, collectedViewCells);
|
---|
| 1098 |
|
---|
| 1099 | ViewCellContainer::const_iterator vit, vit_end = collectedViewCells.end();
|
---|
| 1100 |
|
---|
| 1101 | // evaluate view cells volume contribution with respect to the mail id
|
---|
| 1102 | for (vit = collectedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1103 | {
|
---|
| 1104 | AddViewCellVolumeContri(*vit, pFront, pBack, pFrontAndBack);
|
---|
| 1105 | }
|
---|
| 1106 |
|
---|
| 1107 | const int totalObjects = (int)leaf->mObjects.size();
|
---|
| 1108 | const int nObjectsFront = (int)objectsFront.size();
|
---|
| 1109 | const int nObjectsBack = (int)objectsBack.size();
|
---|
| 1110 |
|
---|
| 1111 | // these are non-overlapping sets
|
---|
| 1112 | pOverall = pFront + pBack + pFrontAndBack;
|
---|
| 1113 |
|
---|
| 1114 | //-- pvs rendering heuristics
|
---|
| 1115 | const float oldRenderCost = pOverall * totalObjects;
|
---|
| 1116 | const float newRenderCost = nObjectsFront * pFront + nObjectsBack * pBack + totalObjects * pFrontAndBack;
|
---|
| 1117 |
|
---|
| 1118 | // normalize volume with view space volume
|
---|
| 1119 | const float renderCostDecrease = (oldRenderCost - newRenderCost) / viewSpaceVol;
|
---|
| 1120 |
|
---|
| 1121 | Debug << "\n(((( eval render cost decrease ))))" << endl
|
---|
| 1122 | << "back objects: " << nObjectsBack << " front objects " << nObjectsFront << " total objects: " << totalObjects << endl
|
---|
| 1123 | << "back p: " << pBack / viewSpaceVol << " front p " << pFront / viewSpaceVol
|
---|
| 1124 | << " front and back p " << pFrontAndBack / viewSpaceVol << " p: " << pOverall / viewSpaceVol << endl
|
---|
| 1125 | << "old rc: " << oldRenderCost / viewSpaceVol << " new rc: " << newRenderCost / viewSpaceVol << endl
|
---|
| 1126 | << "render cost decrease: " << renderCostDecrease << endl;
|
---|
| 1127 |
|
---|
| 1128 | normalizedOldRenderCost = oldRenderCost / viewSpaceVol;
|
---|
| 1129 |
|
---|
| 1130 | if (oldRenderCost < newRenderCost * 0.99)
|
---|
| 1131 | Debug << "\nwarning2!!:\n" << "old rc: " << oldRenderCost * viewSpaceVol << " new rc: " << newRenderCost * viewSpaceVol << endl;
|
---|
| 1132 |
|
---|
| 1133 | return renderCostDecrease;
|
---|
| 1134 | }
|
---|
| 1135 |
|
---|
| 1136 |
|
---|
| 1137 | AxisAlignedBox3 BvHierarchy::ComputeBoundingBox(const ObjectContainer &objects)
|
---|
| 1138 | {
|
---|
| 1139 | AxisAlignedBox3 box;
|
---|
| 1140 | box.Initialize();
|
---|
| 1141 |
|
---|
| 1142 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
| 1143 |
|
---|
| 1144 | //-- compute bounding box
|
---|
| 1145 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
| 1146 | {
|
---|
| 1147 | Intersectable *obj = *oit;
|
---|
| 1148 |
|
---|
| 1149 | // compute bounding box of view space
|
---|
| 1150 | mBoundingBox.Include(obj->GetBox());
|
---|
| 1151 | }
|
---|
| 1152 | return box;
|
---|
| 1153 |
|
---|
| 1154 | }
|
---|
| 1155 |
|
---|
| 1156 |
|
---|
| 1157 | void BvHierarchy::CollectLeaves(vector<BvhLeaf *> &leaves) const
|
---|
| 1158 | {
|
---|
| 1159 | stack<BvhNode *> nodeStack;
|
---|
| 1160 | nodeStack.push(mRoot);
|
---|
| 1161 |
|
---|
| 1162 | while (!nodeStack.empty())
|
---|
| 1163 | {
|
---|
| 1164 | BvhNode *node = nodeStack.top();
|
---|
| 1165 | nodeStack.pop();
|
---|
| 1166 | if (node->IsLeaf())
|
---|
| 1167 | {
|
---|
| 1168 | BvhLeaf *leaf = (BvhLeaf *)node;
|
---|
| 1169 | leaves.push_back(leaf);
|
---|
| 1170 | }
|
---|
| 1171 | else
|
---|
| 1172 | {
|
---|
| 1173 | BvhInterior *interior = (BvhInterior *)node;
|
---|
| 1174 |
|
---|
| 1175 | nodeStack.push(interior->GetBack());
|
---|
| 1176 | nodeStack.push(interior->GetFront());
|
---|
| 1177 | }
|
---|
| 1178 | }
|
---|
| 1179 | }
|
---|
| 1180 |
|
---|
| 1181 |
|
---|
| 1182 | AxisAlignedBox3 BvHierarchy::GetBoundingBox(BvhNode *node) const
|
---|
| 1183 | {
|
---|
| 1184 | return node->GetBoundingBox();
|
---|
| 1185 | }
|
---|
| 1186 |
|
---|
| 1187 |
|
---|
| 1188 | void BvHierarchy::CollectViewCells(BvhLeaf *leaf, ViewCellContainer &viewCells)
|
---|
| 1189 | {
|
---|
| 1190 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1191 |
|
---|
| 1192 | ViewCell::NewMail();
|
---|
| 1193 |
|
---|
| 1194 | // loop through all object and collect view cell pvs of this node
|
---|
| 1195 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1196 | {
|
---|
| 1197 | Intersectable *obj = *oit;
|
---|
| 1198 |
|
---|
| 1199 | ViewCellPvsMap::const_iterator vit, vit_end = obj->mViewCellPvs.mEntries.end();
|
---|
| 1200 |
|
---|
| 1201 | for (vit = obj->mViewCellPvs.mEntries.begin(); vit != vit_end; ++ vit)
|
---|
| 1202 | {
|
---|
| 1203 | ViewCell *vc = (*vit).first;
|
---|
| 1204 |
|
---|
| 1205 | if (!vc->Mailed())
|
---|
| 1206 | {
|
---|
| 1207 | vc->Mail();
|
---|
| 1208 | viewCells.push_back(vc);
|
---|
| 1209 | }
|
---|
| 1210 | }
|
---|
| 1211 | }
|
---|
| 1212 | }
|
---|
| 1213 |
|
---|
| 1214 |
|
---|
| 1215 | void BvHierarchy::CollectDirtyCandidates(BvhSubdivisionCandidate *sc,
|
---|
| 1216 | vector<SubdivisionCandidate *> &dirtyList)
|
---|
| 1217 | {
|
---|
| 1218 | BvhTraversalData &tData = sc->mParentData;
|
---|
| 1219 | BvhLeaf *node = tData.mNode;
|
---|
| 1220 |
|
---|
| 1221 | ViewCell::NewMail();
|
---|
| 1222 |
|
---|
| 1223 | ViewCellContainer viewCells;
|
---|
| 1224 | ViewCellContainer tmpViewCells;
|
---|
| 1225 |
|
---|
| 1226 | VssRayContainer rays;
|
---|
| 1227 | CollectRays(node->mObjects, rays);
|
---|
| 1228 |
|
---|
| 1229 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1230 |
|
---|
| 1231 | // find all view cells associated with the rays, add them to view cells
|
---|
| 1232 | for (rit = rays.begin(); rit != rit_end; ++ rit)
|
---|
| 1233 | {
|
---|
| 1234 | VssRay *ray = (*rit);
|
---|
| 1235 | mVspTree->GetViewCells(*ray, tmpViewCells);
|
---|
| 1236 |
|
---|
| 1237 | ViewCellContainer::const_iterator vit, vit_end = tmpViewCells.end();
|
---|
| 1238 |
|
---|
| 1239 | for (vit = tmpViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1240 | {
|
---|
| 1241 | VspViewCell *vc = dynamic_cast<VspViewCell *>(*vit);
|
---|
| 1242 |
|
---|
| 1243 | if (!vc->Mailed())
|
---|
| 1244 | {
|
---|
| 1245 | vc->Mail();
|
---|
| 1246 | viewCells.push_back(vc);
|
---|
| 1247 | }
|
---|
| 1248 | }
|
---|
| 1249 | }
|
---|
| 1250 |
|
---|
| 1251 |
|
---|
| 1252 | // split candidates holding this view cells
|
---|
| 1253 | // are thrown into dirty list
|
---|
| 1254 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 1255 |
|
---|
| 1256 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1257 | {
|
---|
| 1258 | VspViewCell *vc = dynamic_cast<VspViewCell *>(*vit);
|
---|
| 1259 |
|
---|
| 1260 | VspLeaf *leaf = vc->mLeaf;
|
---|
| 1261 | dirtyList.push_back(leaf->GetSubdivisionCandidate());
|
---|
| 1262 | }
|
---|
| 1263 | }
|
---|
| 1264 |
|
---|
| 1265 |
|
---|
| 1266 | BvhNode *BvHierarchy::GetRoot() const
|
---|
| 1267 | {
|
---|
| 1268 | return mRoot;
|
---|
| 1269 | }
|
---|
| 1270 |
|
---|
| 1271 |
|
---|
| 1272 | bool BvHierarchy::IsObjectInLeaf(BvhLeaf *leaf, Intersectable *object) const
|
---|
| 1273 | {
|
---|
| 1274 | ObjectContainer::const_iterator oit =
|
---|
| 1275 | lower_bound(leaf->mObjects.begin(), leaf->mObjects.end(), object, ilt);
|
---|
| 1276 |
|
---|
| 1277 | // objects sorted by id
|
---|
| 1278 | if ((oit != leaf->mObjects.end()) && ((*oit)->GetId() == object->GetId()))
|
---|
| 1279 | {
|
---|
| 1280 | return true;
|
---|
| 1281 | }
|
---|
| 1282 | else
|
---|
| 1283 | {
|
---|
| 1284 | return false;
|
---|
| 1285 | }
|
---|
| 1286 | }
|
---|
| 1287 |
|
---|
| 1288 |
|
---|
| 1289 | BvhLeaf *BvHierarchy::GetLeaf(Intersectable *object, BvhNode *node) const
|
---|
| 1290 | {
|
---|
| 1291 | // rather use the simple version
|
---|
| 1292 | return object->mBvhLeaf;
|
---|
| 1293 |
|
---|
| 1294 | ///////////////////////////////////////
|
---|
| 1295 | // start from root of tree
|
---|
| 1296 | if (node == NULL)
|
---|
| 1297 | {
|
---|
| 1298 | node = mRoot;
|
---|
| 1299 | }
|
---|
| 1300 |
|
---|
| 1301 | vector<BvhLeaf *> leaves;
|
---|
| 1302 |
|
---|
| 1303 | stack<BvhNode *> nodeStack;
|
---|
| 1304 | nodeStack.push(node);
|
---|
| 1305 |
|
---|
| 1306 | BvhLeaf *leaf = NULL;
|
---|
| 1307 |
|
---|
| 1308 | while (!nodeStack.empty())
|
---|
| 1309 | {
|
---|
| 1310 | BvhNode *node = nodeStack.top();
|
---|
| 1311 | nodeStack.pop();
|
---|
| 1312 |
|
---|
| 1313 | if (node->IsLeaf())
|
---|
| 1314 | {
|
---|
| 1315 | leaf = dynamic_cast<BvhLeaf *>(node);
|
---|
| 1316 |
|
---|
| 1317 | if (IsObjectInLeaf(leaf, object))
|
---|
| 1318 | return leaf;
|
---|
| 1319 | }
|
---|
| 1320 | else
|
---|
| 1321 | {
|
---|
| 1322 | // find point
|
---|
| 1323 | BvhInterior *interior = dynamic_cast<BvhInterior *>(node);
|
---|
| 1324 |
|
---|
| 1325 | if (interior->GetBack()->GetBoundingBox().Includes(object->GetBox()))
|
---|
| 1326 | {
|
---|
| 1327 | nodeStack.push(interior->GetBack());
|
---|
| 1328 | }
|
---|
| 1329 |
|
---|
| 1330 | // search both sides as we are using bounding volumes
|
---|
| 1331 | if (interior->GetFront()->GetBoundingBox().Includes(object->GetBox()))
|
---|
| 1332 | {
|
---|
| 1333 | nodeStack.push(interior->GetFront());
|
---|
| 1334 | }
|
---|
| 1335 | }
|
---|
| 1336 | }
|
---|
| 1337 |
|
---|
| 1338 | return leaf;
|
---|
| 1339 | }
|
---|
| 1340 |
|
---|
| 1341 |
|
---|
| 1342 | BvhIntersectable *BvHierarchy::GetOrCreateBvhIntersectable(BvhNode *node)
|
---|
| 1343 | {
|
---|
| 1344 | // search nodes
|
---|
| 1345 | std::map<BvhNode *, BvhIntersectable *>::
|
---|
| 1346 | const_iterator it = mBvhIntersectables.find(node);
|
---|
| 1347 |
|
---|
| 1348 | if (it != mBvhIntersectables.end())
|
---|
| 1349 | {
|
---|
| 1350 | return (*it).second;
|
---|
| 1351 | }
|
---|
| 1352 |
|
---|
| 1353 | // not in map => create new entry
|
---|
| 1354 | BvhIntersectable *bvhObj = new BvhIntersectable(node);
|
---|
| 1355 | mBvhIntersectables[node] = bvhObj;
|
---|
| 1356 |
|
---|
| 1357 | return bvhObj;
|
---|
| 1358 | }
|
---|
| 1359 |
|
---|
| 1360 |
|
---|
| 1361 | void BvHierarchy::AddViewCellVolumeContri(ViewCell *vc,
|
---|
| 1362 | float &frontVol,
|
---|
| 1363 | float &backVol,
|
---|
| 1364 | float &frontAndBackVol) const
|
---|
| 1365 | {
|
---|
| 1366 | if (vc->Mailed())
|
---|
| 1367 | {
|
---|
| 1368 | frontVol += vc->GetVolume();
|
---|
| 1369 | }
|
---|
| 1370 | else if (vc->Mailed(1))
|
---|
| 1371 | {
|
---|
| 1372 | backVol += vc->GetVolume();
|
---|
| 1373 | }
|
---|
| 1374 | else if (vc->Mailed(2))
|
---|
| 1375 | {
|
---|
| 1376 | frontAndBackVol += vc->GetVolume();
|
---|
| 1377 | }
|
---|
| 1378 | }
|
---|
| 1379 |
|
---|
| 1380 | /*
|
---|
| 1381 | int BvHierarchy::UpdateViewCellsPvs(BvhLeaf *leaf,
|
---|
| 1382 | const RayInfoContainer &rays) const
|
---|
| 1383 |
|
---|
| 1384 | {
|
---|
| 1385 | MailablePvsData::NewMail();
|
---|
| 1386 |
|
---|
| 1387 | ViewCellContainer touchedViewCells;
|
---|
| 1388 | CollectTouchedViewCells(rays, touchedViewCells);
|
---|
| 1389 |
|
---|
| 1390 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1391 |
|
---|
| 1392 | for (oit = leaf->mObjects.begin(); oit < oit_end; ++ oit)
|
---|
| 1393 | {
|
---|
| 1394 | Intersectable *obj = *oit;
|
---|
| 1395 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 1396 |
|
---|
| 1397 | // traverse through view cells and classify them according
|
---|
| 1398 | // to them being seen from to back / front / front and back node
|
---|
| 1399 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1400 | {
|
---|
| 1401 | ViewCell *vc = *vit;
|
---|
| 1402 | float contri;
|
---|
| 1403 | AddViewCellToObjectPvs(obj, vc, contri, true);
|
---|
| 1404 | }
|
---|
| 1405 | }
|
---|
| 1406 |
|
---|
| 1407 | return 0;
|
---|
| 1408 | }
|
---|
| 1409 |
|
---|
| 1410 |
|
---|
| 1411 | int BvHierarchy::RemoveParentViewCellsPvs(BvhLeaf *leaf,
|
---|
| 1412 | const RayInfoContainer &rays
|
---|
| 1413 | ) const
|
---|
| 1414 |
|
---|
| 1415 | {
|
---|
| 1416 | MailablePvsData::NewMail();
|
---|
| 1417 |
|
---|
| 1418 | ViewCellContainer touchedViewCells;
|
---|
| 1419 | CollectTouchedViewCells(rays, touchedViewCells);
|
---|
| 1420 |
|
---|
| 1421 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
| 1422 |
|
---|
| 1423 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
| 1424 | {
|
---|
| 1425 | Intersectable *obj = *oit;
|
---|
| 1426 |
|
---|
| 1427 | // traverse through view cells and classify them according
|
---|
| 1428 | // to them being seen from to back / front / front and back node
|
---|
| 1429 | ViewCellContainer::const_iterator vit, vit_end = touchedViewCells.end();
|
---|
| 1430 |
|
---|
| 1431 | for (vit = touchedViewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1432 | {
|
---|
| 1433 | ViewCell *vc = *vit;
|
---|
| 1434 |
|
---|
| 1435 | MailablePvsData *vdata = obj->mViewCellPvs.Find(vc);
|
---|
| 1436 |
|
---|
| 1437 | if (vdata && !vdata->Mailed())
|
---|
| 1438 | {
|
---|
| 1439 | vdata->Mail();
|
---|
| 1440 | obj->mViewCellPvs.RemoveSample(vc, 1);
|
---|
| 1441 | }
|
---|
| 1442 | }
|
---|
| 1443 | }
|
---|
| 1444 |
|
---|
| 1445 | return 0;
|
---|
| 1446 | }
|
---|
| 1447 | */
|
---|
| 1448 |
|
---|
| 1449 | bool BvHierarchy::Export(OUT_STREAM &stream)
|
---|
| 1450 | {
|
---|
| 1451 | ExportNode(mRoot, stream);
|
---|
| 1452 |
|
---|
| 1453 | return true;
|
---|
| 1454 | }
|
---|
| 1455 |
|
---|
| 1456 |
|
---|
| 1457 | void BvHierarchy::ExportNode(BvhNode *node, OUT_STREAM &stream)
|
---|
| 1458 | {
|
---|
| 1459 | if (node->IsLeaf())
|
---|
| 1460 | {
|
---|
| 1461 | BvhLeaf *leaf = dynamic_cast<BvhLeaf *>(node);
|
---|
| 1462 |
|
---|
| 1463 | stream << "<Leaf ";
|
---|
| 1464 | stream << "objects=\"";
|
---|
| 1465 |
|
---|
| 1466 | //-- export objects in kd leaves
|
---|
| 1467 | //if (mExportObjects) ExportObjects(leaf, stream);
|
---|
| 1468 |
|
---|
| 1469 | stream << "\" />" << endl;
|
---|
| 1470 | //stream << " </Leaf>" << endl;
|
---|
| 1471 | }
|
---|
| 1472 | else
|
---|
| 1473 | {
|
---|
| 1474 | BvhInterior *interior = dynamic_cast<BvhInterior *>(node);
|
---|
| 1475 |
|
---|
| 1476 | stream << "<Interior box=\"" << interior->GetBoundingBox() << "\">" << endl;
|
---|
| 1477 |
|
---|
| 1478 | ExportNode(interior->GetBack(), stream);
|
---|
| 1479 | ExportNode(interior->GetFront(), stream);
|
---|
| 1480 |
|
---|
| 1481 | stream << "</Interior>" << endl;
|
---|
| 1482 | }
|
---|
| 1483 | }
|
---|
| 1484 |
|
---|
| 1485 |
|
---|
| 1486 | float BvHierarchy::EvalViewCellsVolume(BvhLeaf *leaf) const
|
---|
| 1487 | {
|
---|
| 1488 | float vol = 0;
|
---|
| 1489 |
|
---|
| 1490 | VssRayContainer rays;
|
---|
| 1491 | CollectRays(leaf->mObjects, rays);
|
---|
| 1492 |
|
---|
| 1493 | ViewCell::NewMail();
|
---|
| 1494 |
|
---|
| 1495 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 1496 |
|
---|
| 1497 | for (rit = rays.begin(); rit < rit_end; ++ rit)
|
---|
| 1498 | {
|
---|
| 1499 | VssRay *ray = (*rit);
|
---|
| 1500 |
|
---|
| 1501 | ViewCellContainer viewCells;
|
---|
| 1502 | mVspTree->GetViewCells(*ray, viewCells);
|
---|
| 1503 |
|
---|
| 1504 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
| 1505 |
|
---|
| 1506 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
| 1507 | {
|
---|
| 1508 | ViewCell *vc = (*vit);
|
---|
| 1509 |
|
---|
| 1510 | if (!vc->Mailed())
|
---|
| 1511 | {
|
---|
| 1512 | //Debug << "single vol: "<< vc->GetVolume() << endl;
|
---|
| 1513 | vc->Mail();
|
---|
| 1514 | vol += vc->GetVolume();
|
---|
| 1515 | }
|
---|
| 1516 | }
|
---|
| 1517 | }
|
---|
| 1518 |
|
---|
| 1519 | return vol;
|
---|
| 1520 | }
|
---|
| 1521 |
|
---|
| 1522 |
|
---|
| 1523 | SubdivisionCandidate *BvHierarchy::PrepareConstruction(const VssRayContainer &sampleRays,
|
---|
| 1524 | ObjectContainer &objects,
|
---|
| 1525 | AxisAlignedBox3 *forcedObjectSpace
|
---|
| 1526 | //, RayInfoContainer &rays
|
---|
| 1527 | )
|
---|
| 1528 | {
|
---|
| 1529 | // store pointer to this tree
|
---|
| 1530 | BvhSubdivisionCandidate::sBvHierarchy = this;
|
---|
| 1531 | mBvhStats.nodes = 1;
|
---|
| 1532 |
|
---|
| 1533 | // compute bounding box from objects
|
---|
| 1534 | if (forcedObjectSpace)
|
---|
| 1535 | mBoundingBox = *forcedObjectSpace;
|
---|
| 1536 | else
|
---|
| 1537 | mBoundingBox = ComputeBoundingBox(objects);
|
---|
| 1538 |
|
---|
| 1539 | mTermMinVolume *= mBoundingBox.GetVolume();
|
---|
| 1540 | mGlobalCostMisses = 0;
|
---|
| 1541 |
|
---|
| 1542 | // sort objects by id in order to have sorted objects in
|
---|
| 1543 | // the leaf nodes
|
---|
| 1544 | stable_sort(objects.begin(), objects.end(), ilt);
|
---|
| 1545 |
|
---|
| 1546 | //-- create new root
|
---|
| 1547 |
|
---|
| 1548 | BvhLeaf *bvhleaf = new BvhLeaf(mBoundingBox, NULL, (int)objects.size());
|
---|
| 1549 | bvhleaf->mObjects = objects;
|
---|
| 1550 | mRoot = bvhleaf;
|
---|
| 1551 |
|
---|
| 1552 | // only rays intersecting objects in node are interesting
|
---|
| 1553 | AssociateObjectsWithRays(sampleRays);
|
---|
| 1554 | // associate root with current objects
|
---|
| 1555 | AssociateObjectsWithLeaf(bvhleaf);
|
---|
| 1556 |
|
---|
| 1557 | //-- add first candidate for object space partition
|
---|
| 1558 |
|
---|
| 1559 | // create osp traversal data
|
---|
| 1560 | BvhTraversalData oData(bvhleaf, 0, mBoundingBox.GetVolume());
|
---|
| 1561 |
|
---|
| 1562 | //-- first split candidate
|
---|
| 1563 | BvhSubdivisionCandidate *oSubdivisionCandidate =
|
---|
| 1564 | new BvhSubdivisionCandidate(oData);
|
---|
| 1565 |
|
---|
| 1566 | //UpdateViewCellsPvs(kdleaf, rays);
|
---|
| 1567 |
|
---|
| 1568 | EvalSubdivisionCandidate(*oSubdivisionCandidate);
|
---|
| 1569 |
|
---|
| 1570 | // probabilty is voume of all "seen" view cells
|
---|
| 1571 | #if 1
|
---|
| 1572 | const float prop = EvalViewCellsVolume(bvhleaf);
|
---|
| 1573 | #else
|
---|
| 1574 | const float prop = GetBoundingBox().GetVolume();
|
---|
| 1575 | #endif
|
---|
| 1576 | mTotalCost = (float)objects.size() * prop /
|
---|
| 1577 | mVspTree->GetBoundingBox().GetVolume();
|
---|
| 1578 |
|
---|
| 1579 | EvalSubdivisionStats(*oSubdivisionCandidate);
|
---|
| 1580 |
|
---|
| 1581 | return oSubdivisionCandidate;
|
---|
| 1582 | }
|
---|
| 1583 |
|
---|
| 1584 |
|
---|
[1259] | 1585 | bool BvHierarchy::AddLeafToPvs(BvhLeaf *leaf,
|
---|
| 1586 | ViewCell *vc,
|
---|
| 1587 | const float pdf,
|
---|
| 1588 | float &contribution)
|
---|
| 1589 | {
|
---|
| 1590 | // add kd intersecable to pvs
|
---|
| 1591 | BvhIntersectable *bvhObj = GetOrCreateBvhIntersectable(leaf);
|
---|
| 1592 |
|
---|
| 1593 | return vc->AddPvsSample(bvhObj, pdf, contribution);
|
---|
| 1594 | }
|
---|
[1237] | 1595 |
|
---|
[1272] | 1596 | }
|
---|
[1259] | 1597 |
|
---|