[372] | 1 | #include "SceneGraph.h"
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| 2 | #include "KdTree.h"
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| 3 | #include "SamplingPreprocessor.h"
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| 4 | #include "X3dExporter.h"
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| 5 | #include "Environment.h"
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| 6 | #include "MutualVisibility.h"
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| 7 | #include "Polygon3.h"
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| 8 | #include "ViewCell.h"
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| 9 |
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| 10 | SamplingPreprocessor::SamplingPreprocessor(): mPass(0), mSampleRays(NULL)
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| 11 | {
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| 12 | // this should increase coherence of the samples
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| 13 | environment->GetIntValue("Sampling.samplesPerPass", mSamplesPerPass);
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| 14 | environment->GetIntValue("Sampling.totalSamples", mTotalSamples);
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| 15 | environment->GetIntValue("BspTree.Construction.samples", mBspConstructionSamples);
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[378] | 16 | environment->GetIntValue("ViewCells.PostProcessing.samples", mPostProcessSamples);
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[372] | 17 | mKdPvsDepth = 100;
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| 18 | mStats.open("stats.log");
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| 19 |
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| 20 | }
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| 21 |
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| 22 | SamplingPreprocessor::~SamplingPreprocessor()
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| 23 | {
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| 24 | CLEAR_CONTAINER(mSampleRays);
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| 25 | }
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| 26 |
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| 27 | void
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| 28 | SamplingPreprocessor::SetupRay(Ray &ray,
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| 29 | const Vector3 &point,
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| 30 | const Vector3 &direction,
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| 31 | const int type)
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| 32 | {
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| 33 | ray.intersections.clear();
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| 34 | ray.kdLeaves.clear();
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[374] | 35 | ray.testedObjects.clear();
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[372] | 36 | ray.bspIntersections.clear();
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[374] | 37 | ray.mFlags |= Ray::STORE_KDLEAVES | Ray::STORE_BSP_INTERSECTIONS;
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[372] | 38 | // cout<<point<<" "<<direction<<endl;
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| 39 | ray.Init(point, direction, type);
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| 40 | }
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| 41 |
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| 42 | KdNode *
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| 43 | SamplingPreprocessor::GetNodeForPvs(KdLeaf *leaf)
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| 44 | {
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| 45 | KdNode *node = leaf;
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| 46 | while (node->mParent && node->mDepth > mKdPvsDepth)
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| 47 | node = node->mParent;
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| 48 | return node;
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| 49 | }
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| 50 |
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| 51 | bool
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| 52 | SamplingPreprocessor::BuildBspTree()
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| 53 | {
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| 54 | // delete old tree
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| 55 | DEL_PTR(mBspTree);
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| 56 | mBspTree = new BspTree(&mUnbounded);
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| 57 | ObjectContainer objects;
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| 58 |
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| 59 | switch (BspTree::sConstructionMethod)
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| 60 | {
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| 61 | case BspTree::FROM_INPUT_VIEW_CELLS:
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| 62 | mBspTree->SetGenerateViewCells(false);
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| 63 | mBspTree->Construct(mViewCells);
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| 64 | break;
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| 65 | case BspTree::FROM_SCENE_GEOMETRY:
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| 66 | DeleteViewCells(); // we generate new view cells
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| 67 | mBspTree->SetGenerateViewCells(true);
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| 68 | mSceneGraph->CollectObjects(&objects);
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| 69 | mBspTree->Construct(objects);
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| 70 | break;
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| 71 | case BspTree::FROM_RAYS:
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| 72 | DeleteViewCells(); // we generate new view cells
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| 73 | mBspTree->SetGenerateViewCells(true);
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| 74 | mBspTree->Construct(mSampleRays);
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| 75 | break;
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| 76 | default:
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| 77 | Debug << "Error: Method not available\n";
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| 78 | break;
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| 79 | }
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| 80 |
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| 81 |
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| 82 | return true;
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| 83 | }
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| 84 |
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| 85 | int
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| 86 | SamplingPreprocessor::AddNodeSamples(const Ray &ray,
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| 87 | Intersectable *sObject,
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| 88 | Intersectable *tObject
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| 89 | )
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| 90 | {
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| 91 | int contributingSamples = 0;
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| 92 | int j;
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| 93 | int objects = 0;
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| 94 | if (sObject)
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| 95 | objects++;
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| 96 | if (tObject)
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| 97 | objects++;
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| 98 |
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| 99 | if (objects) {
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| 100 | for (j=0; j < ray.kdLeaves.size(); j++) {
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| 101 | KdNode *node = GetNodeForPvs( ray.kdLeaves[j] );
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| 102 | if (sObject)
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| 103 | contributingSamples += sObject->mKdPvs.AddSample(node);
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| 104 | if (tObject)
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| 105 | contributingSamples += tObject->mKdPvs.AddSample(node);
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| 106 | }
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| 107 | }
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| 108 |
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| 109 | for (j=1; j < ((int)ray.kdLeaves.size() - 1); j++) {
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| 110 | ray.kdLeaves[j]->AddPassingRay2(ray,
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| 111 | objects,
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| 112 | ray.kdLeaves.size()
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| 113 | );
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| 114 | }
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| 115 |
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| 116 | return contributingSamples;
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| 117 | }
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| 118 |
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| 119 |
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| 120 | int SamplingPreprocessor::AddObjectSamples(Intersectable *obj, const Ray &ray)
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| 121 | {
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| 122 | int contributingSamples = 0;
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| 123 | int j;
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| 124 |
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| 125 | // object can be seen from the view cell => add to view cell pvs
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| 126 | for (j=0; j < ray.bspIntersections.size(); ++ j)
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| 127 | {
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| 128 | BspLeaf *leaf = ray.bspIntersections[j].mLeaf;
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| 129 | // if ray not in unbounded space
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| 130 | if (leaf->GetViewCell() != &mUnbounded)
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| 131 | contributingSamples +=
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| 132 | leaf->GetViewCell()->GetPvs().AddSample(obj);
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| 133 | }
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| 134 |
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| 135 | // rays passing through this viewcell
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| 136 | if (mPass > 1)
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| 137 | for (j=1; j < ((int)ray.bspIntersections.size() - 1); ++ j)
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| 138 | {
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| 139 | BspLeaf *leaf = ray.bspIntersections[j].mLeaf;
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| 140 |
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| 141 | if (leaf->GetViewCell() != &mUnbounded)
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| 142 | leaf->GetViewCell()->
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| 143 | AddPassingRay(ray, contributingSamples ? 1 : 0);
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| 144 | }
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| 145 |
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| 146 | return contributingSamples;
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| 147 | }
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| 148 |
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| 149 |
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| 150 | void
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| 151 | SamplingPreprocessor::HoleSamplingPass()
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| 152 | {
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| 153 | vector<KdLeaf *> leaves;
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| 154 | mKdTree->CollectLeaves(leaves);
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| 155 |
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| 156 | // go through all the leaves and evaluate their passing contribution
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| 157 | for (int i=0 ; i < leaves.size(); i++) {
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| 158 | KdLeaf *leaf = leaves[i];
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| 159 | cout<<leaf->mPassingRays<<endl;
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| 160 | }
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| 161 | }
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| 162 |
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| 163 |
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| 164 | int
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| 165 | SamplingPreprocessor::CastRay(Intersectable *object,
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| 166 | Ray &ray
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| 167 | )
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| 168 | {
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| 169 | int sampleContributions = 0;
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| 170 |
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| 171 | long t1 = GetRealTime();
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| 172 | // cast ray to KD tree to find intersection with other objects
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| 173 | mKdTree->CastRay(ray);
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| 174 | long t2 = GetRealTime();
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| 175 |
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| 176 | if (0 && object && object->GetId() > 2197) {
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| 177 | object->Describe(cout)<<endl;
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| 178 | cout<<ray<<endl;
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| 179 | }
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| 180 |
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| 181 | if (ViewCell::sHierarchy == ViewCell::BSP)
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| 182 | {
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| 183 | // cast ray to BSP tree to get intersection with view cells
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| 184 | if (mBspTree)
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| 185 | {
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| 186 | mBspTree->CastRay(ray);
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| 187 |
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| 188 | if (object)
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| 189 | sampleContributions += AddObjectSamples(object, ray);
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| 190 |
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| 191 | if (!ray.intersections.empty()) // second intersection found
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| 192 | {
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| 193 | sampleContributions +=
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| 194 | AddObjectSamples(ray.intersections[0].mObject, ray);
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| 195 | }
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| 196 | }
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| 197 | }
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| 198 | else
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| 199 | {
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| 200 | if (ray.kdLeaves.size()) {
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| 201 | Intersectable *terminator =
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| 202 | ray.intersections.size() ? ray.intersections[0].mObject: NULL;
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| 203 |
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| 204 | sampleContributions += AddNodeSamples(ray,
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| 205 | object,
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| 206 | terminator);
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| 207 | }
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| 208 | }
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| 209 |
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| 210 | return sampleContributions;
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| 211 | }
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| 212 |
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| 213 | // void
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| 214 | // SamplingPreprocessor::AvsGenerateRandomRay(Ray &ray)
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| 215 | // {
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| 216 | // int objId = RandomValue(0, mObjects.size());
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| 217 | // Intersectable *object = objects[objId];
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| 218 | // object->GetRandomSurfacePoint(point, normal);
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| 219 | // direction = UniformRandomVector(normal);
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| 220 | // SetupRay(ray, point, direction);
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| 221 | // }
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| 222 |
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| 223 | // void
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| 224 | // SamplingPreprocessor::AvsHandleRay(Ray &ray)
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| 225 | // {
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| 226 | // int sampleContributions = 0;
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| 227 |
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| 228 | // mKdTree->CastRay(ray);
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| 229 |
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| 230 | // if (ray.leaves.size()) {
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| 231 | // sampleContributions += AddNodeSamples(object, ray, pass);
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| 232 |
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| 233 | // if (ray.intersections.size()) {
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| 234 | // sampleContributions += AddNodeSamples(ray.intersections[0].mObject, ray, pass);
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| 235 | // }
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| 236 | // }
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| 237 | // }
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| 238 |
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| 239 | // void
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| 240 | // SamplingPreprocessor::AvsBorderSampling(Ray &ray)
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| 241 | // {
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| 242 |
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| 243 |
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| 244 | // }
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| 245 |
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| 246 | // void
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| 247 | // SamplingPreprocessor::AvsPass()
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| 248 | // {
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| 249 | // Ray ray;
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| 250 | // while (1) {
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| 251 | // AvsGenerateRay(ray);
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| 252 | // HandleRay(ray);
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| 253 | // while ( !mRayQueue.empty() ) {
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| 254 | // Ray ray = mRayQueue.pop();
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| 255 | // mRayQueue.pop();
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| 256 | // AdaptiveBorderSampling(ray);
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| 257 | // }
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| 258 | // }
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| 259 |
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| 260 |
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| 261 |
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| 262 | // }
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| 263 |
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| 264 |
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| 265 | int
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| 266 | SamplingPreprocessor::CastEdgeSamples(
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| 267 | Intersectable *object,
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| 268 | const Vector3 &point,
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| 269 | MeshInstance *mi,
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| 270 | const int samples
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| 271 | )
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| 272 | {
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| 273 | Ray ray;
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| 274 | int maxTries = samples*10;
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| 275 | int i;
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| 276 | int rays = 0;
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| 277 | int edgeSamplesContributions = 0;
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| 278 | for (i=0; i < maxTries && rays < samples; i++) {
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| 279 | // pickup a random face of each mesh
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| 280 | Mesh *mesh = mi->GetMesh();
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| 281 | int face = RandomValue(0, mesh->mFaces.size()-1);
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| 282 |
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| 283 | Polygon3 poly(mesh->mFaces[face], mesh);
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| 284 | poly.Scale(1.001);
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| 285 | // now extend a random edge of the face
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| 286 | int edge = RandomValue(0, poly.mVertices.size()-1);
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| 287 | float t = RandomValue(0.0f,1.0f);
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| 288 | Vector3 target = t*poly.mVertices[edge] + (1.0f-t)*poly.mVertices[(edge + 1)%
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| 289 | poly.mVertices.size()];
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| 290 | SetupRay(ray, point, target - point, Ray::LOCAL_RAY);
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| 291 | if (!mesh->CastRay(ray, mi)) {
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| 292 | // the rays which intersect the mesh have been discarded since they are not tangent
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| 293 | // to the mesh
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| 294 | rays++;
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| 295 | edgeSamplesContributions += CastRay(object, ray);
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| 296 | }
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| 297 | }
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| 298 | return edgeSamplesContributions;
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| 299 | }
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| 300 |
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| 301 | KdNode *
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| 302 | SamplingPreprocessor::GetNodeToSample(Intersectable *object)
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| 303 | {
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| 304 | int pvsSize = object->mKdPvs.GetSize();
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| 305 | KdNode *nodeToSample = NULL;
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| 306 |
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| 307 | bool samplePvsBoundary = false;
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| 308 | if (pvsSize && samplePvsBoundary) {
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| 309 | // this samples the nodes from the boundary of the current PVS
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| 310 | // mail all nodes from the pvs
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| 311 | Intersectable::NewMail();
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| 312 | KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
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| 313 |
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| 314 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 315 | KdNode *node = (*i).first;
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| 316 | node->Mail();
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| 317 | }
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| 318 |
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| 319 | int maxTries = 2*pvsSize;
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| 320 | Debug << "Finding random neighbour" << endl;
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| 321 | for (int tries = 0; tries < 10; tries++) {
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| 322 | int index = RandomValue(0, pvsSize - 1);
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| 323 | KdPvsData data;
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| 324 | KdNode *node;
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| 325 | object->mKdPvs.GetData(index, node, data);
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| 326 | nodeToSample = mKdTree->FindRandomNeighbor(node, true);
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| 327 | if (nodeToSample)
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| 328 | break;
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| 329 | }
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| 330 | } else {
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| 331 | // just pickup a random node
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| 332 | // nodeToSample = mKdTree->GetRandomLeaf(Plane3(normal, point));
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| 333 | nodeToSample = mKdTree->GetRandomLeaf();
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| 334 | }
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| 335 | return nodeToSample;
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| 336 | }
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| 337 |
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| 338 | void
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| 339 | SamplingPreprocessor::VerifyVisibility(Intersectable *object)
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| 340 | {
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| 341 | // mail all nodes from the pvs
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| 342 | Intersectable::NewMail();
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| 343 | KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
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| 344 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 345 | KdNode *node = (*i).first;
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| 346 | node->Mail();
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| 347 | }
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| 348 | Debug << "Get all neighbours from PVS" << endl;
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| 349 | vector<KdNode *> invisibleNeighbors;
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| 350 | // get all neighbors of all PVS nodes
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| 351 | i = object->mKdPvs.mEntries.begin();
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| 352 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 353 | KdNode *node = (*i).first;
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| 354 | mKdTree->FindNeighbors(node, invisibleNeighbors, true);
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| 355 | AxisAlignedBox3 box = object->GetBox();
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| 356 | for (int j=0; j < invisibleNeighbors.size(); j++) {
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| 357 | int visibility = ComputeBoxVisibility(mSceneGraph,
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| 358 | mKdTree,
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| 359 | box,
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| 360 | mKdTree->GetBox(invisibleNeighbors[j]),
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| 361 | 1e-6f);
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| 362 | // exit(0);
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| 363 | }
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| 364 | // now rank all the neighbors according to probability that a new
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| 365 | // sample creates some contribution
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| 366 | }
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| 367 | }
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| 368 |
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| 369 | bool
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| 370 | SamplingPreprocessor::ComputeVisibility()
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| 371 | {
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| 372 |
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| 373 | // pickup an object
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| 374 | ObjectContainer objects;
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| 375 |
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| 376 | mSceneGraph->CollectObjects(&objects);
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| 377 |
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| 378 | Vector3 point, normal, direction;
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| 379 | Ray ray;
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| 380 |
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| 381 | long startTime = GetTime();
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| 382 |
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| 383 | int i;
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| 384 | int totalSamples = 0;
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| 385 |
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| 386 | int pvsOut = Min((int)objects.size(), 10);
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| 387 |
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| 388 | vector<Ray> rays[10];
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| 389 |
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| 390 | while (totalSamples < mTotalSamples) {
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| 391 | int passContributingSamples = 0;
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| 392 | int passSampleContributions = 0;
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| 393 | int passSamples = 0;
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| 394 | int index = 0;
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| 395 |
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| 396 | int reverseSamples = 0;
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| 397 |
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| 398 |
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| 399 | //cout << "totalSamples: " << totalSamples << endl;
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| 400 |
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| 401 | for (i = 0; i < objects.size(); i++) {
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| 402 |
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| 403 | KdNode *nodeToSample = NULL;
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| 404 | Intersectable *object = objects[i];
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| 405 |
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| 406 | int pvsSize = 0;
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| 407 | if (ViewCell::sHierarchy == ViewCell::KD)
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| 408 | pvsSize = object->mKdPvs.GetSize();
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| 409 |
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| 410 |
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| 411 | if (0 && pvsSize && mPass == 1000 ) {
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| 412 | VerifyVisibility(object);
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| 413 | }
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| 414 |
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| 415 | int faceIndex = object->GetRandomSurfacePoint(point, normal);
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| 416 |
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| 417 | bool viewcellSample = true;
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| 418 | int sampleContributions;
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| 419 | bool debug = false; //(object->GetId() >= 2199);
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| 420 | if (viewcellSample) {
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| 421 | //mKdTree->GetRandomLeaf(Plane3(normal, point));
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| 422 |
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| 423 | nodeToSample = GetNodeToSample(object);
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| 424 |
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| 425 | for (int k=0; k < mSamplesPerPass; k++) {
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| 426 | bool reverseSample = false;
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| 427 |
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| 428 |
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| 429 | if (nodeToSample) {
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| 430 | AxisAlignedBox3 box = mKdTree->GetBox(nodeToSample);
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| 431 | Vector3 pointToSample = box.GetRandomPoint();
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| 432 | // pointToSample.y = 0.9*box.Min().y + 0.1*box.Max().y;
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| 433 | if (object->GetRandomVisibleSurfacePoint( point, normal, pointToSample, 3 )) {
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| 434 | direction = pointToSample - point;
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| 435 | } else {
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| 436 | reverseSamples++;
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| 437 | reverseSample = true;
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| 438 | direction = point - pointToSample;
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| 439 | point = pointToSample;
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| 440 | }
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| 441 | }
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| 442 | else {
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| 443 | direction = UniformRandomVector(normal);
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| 444 | }
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| 445 |
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| 446 | // construct a ray
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| 447 | SetupRay(ray, point, direction, Ray::LOCAL_RAY);
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| 448 |
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| 449 | sampleContributions = CastRay(reverseSample ? NULL : object, ray);
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| 450 |
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| 451 | //-- CORR matt: put block inside loop
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| 452 | if (sampleContributions) {
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| 453 | passContributingSamples ++;
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| 454 | passSampleContributions += sampleContributions;
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| 455 | }
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| 456 |
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| 457 | if ( i < pvsOut )
|
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| 458 | rays[i].push_back(ray);
|
---|
| 459 |
|
---|
| 460 | if (!ray.intersections.empty()) {
|
---|
| 461 | // check whether we can add this to the rays
|
---|
| 462 | for (int j = 0; j < pvsOut; j++) {
|
---|
| 463 | if (objects[j] == ray.intersections[0].mObject) {
|
---|
| 464 | rays[j].push_back(ray);
|
---|
| 465 | }
|
---|
| 466 | }
|
---|
| 467 | }
|
---|
| 468 | //-------------------
|
---|
| 469 | if (ViewCell::sHierarchy == ViewCell::BSP)
|
---|
| 470 | {
|
---|
| 471 | ProcessBspViewCells(ray,
|
---|
| 472 | object,
|
---|
| 473 | faceIndex,
|
---|
| 474 | passContributingSamples,
|
---|
| 475 | passSampleContributions);
|
---|
| 476 | }
|
---|
| 477 | }
|
---|
| 478 | } else {
|
---|
| 479 | // edge samples
|
---|
| 480 | // get random visible mesh
|
---|
| 481 | // object->GetRandomVisibleMesh(Plane3(normal, point));
|
---|
| 482 | }
|
---|
| 483 |
|
---|
| 484 | // CORR matt: must add all samples
|
---|
| 485 | passSamples += mSamplesPerPass;
|
---|
| 486 | }
|
---|
| 487 |
|
---|
| 488 | totalSamples += passSamples;
|
---|
| 489 |
|
---|
| 490 | // if (pass>10)
|
---|
| 491 | // HoleSamplingPass();
|
---|
| 492 |
|
---|
| 493 | mPass++;
|
---|
| 494 |
|
---|
| 495 | int pvsSize = 0;
|
---|
| 496 |
|
---|
| 497 | if (ViewCell::sHierarchy == ViewCell::BSP) {
|
---|
| 498 | for (i=0; i < mViewCells.size(); i++) {
|
---|
| 499 | ViewCell *vc = mViewCells[i];
|
---|
| 500 | pvsSize += vc->GetPvs().GetSize();
|
---|
| 501 | }
|
---|
| 502 | } else {
|
---|
| 503 | for (i=0; i < objects.size(); i++) {
|
---|
| 504 | Intersectable *object = objects[i];
|
---|
| 505 | pvsSize += object->mKdPvs.GetSize();
|
---|
| 506 | }
|
---|
| 507 | }
|
---|
| 508 |
|
---|
| 509 | float avgRayContrib = (passContributingSamples > 0) ?
|
---|
| 510 | passSampleContributions/(float)passContributingSamples : 0;
|
---|
| 511 |
|
---|
| 512 | cout << "#Pass " << mPass << " : t = " << TimeDiff(startTime, GetTime())*1e-3 << "s" << endl;
|
---|
| 513 | cout << "#TotalSamples=" << totalSamples/1000
|
---|
| 514 | << "k #SampleContributions=" << passSampleContributions << " ("
|
---|
| 515 | << 100*passContributingSamples/(float)passSamples<<"%)" << " avgPVS="
|
---|
[375] | 516 | << pvsSize /(float)objects.size() << endl
|
---|
[372] | 517 | << "avg ray contrib=" << avgRayContrib << endl
|
---|
| 518 | << "reverse samples [%]" << reverseSamples/(float)passSamples*100.0f << endl;
|
---|
| 519 |
|
---|
| 520 | mStats <<
|
---|
| 521 | "#Pass\n" <<mPass<<endl<<
|
---|
| 522 | "#Time\n" << TimeDiff(startTime, GetTime())*1e-3 << endl<<
|
---|
| 523 | "#TotalSamples\n" << totalSamples<< endl<<
|
---|
| 524 | "#SampleContributions\n" << passSampleContributions << endl <<
|
---|
| 525 | "#PContributingSamples\n"<<100*passContributingSamples/(float)passSamples<<endl <<
|
---|
| 526 | "#AvgPVS\n"<< pvsSize/(float)objects.size() << endl <<
|
---|
| 527 | "#AvgRayContrib\n" << avgRayContrib << endl;
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | if (ViewCell::sHierarchy == ViewCell::KD)
|
---|
| 531 | cout << "#totalPvsSize=" << mKdTree->CollectLeafPvs() << endl;
|
---|
| 532 |
|
---|
| 533 | if (mBspTree)
|
---|
| 534 | {
|
---|
[378] | 535 | //-- render simulation
|
---|
| 536 | cout << "\nevaluating render time before merge ... ";
|
---|
| 537 | Real rt = SimulateRendering();
|
---|
| 538 |
|
---|
| 539 | cout << "avg render time: " << rt * 1e-3 << endl;
|
---|
| 540 | Debug << "avg render time: " << rt * 1e-3 << endl;
|
---|
| 541 |
|
---|
| 542 | //-- post processing of bsp view cells
|
---|
| 543 | int vcSize = 0;
|
---|
[375] | 544 | int pvsSize = 0;
|
---|
| 545 |
|
---|
| 546 | BspViewCellsStatistics stat;
|
---|
| 547 |
|
---|
| 548 | Debug << "overall scene size: " << objects.size() << endl;
|
---|
| 549 | mBspTree->EvaluateViewCellsStats(stat);
|
---|
| 550 |
|
---|
| 551 | Debug << "original view cell partition:\n" << stat << endl;
|
---|
| 552 |
|
---|
[379] | 553 | if (1) // export view cells
|
---|
| 554 | {
|
---|
| 555 | cout << "exporting view cells ... ";
|
---|
| 556 | Exporter *exporter = Exporter::GetExporter("view_cells.x3d");
|
---|
| 557 | if (exporter)
|
---|
| 558 | {
|
---|
[380] | 559 | exporter->ExportBspViewCellPartition(*mBspTree, stat.maxPvs);
|
---|
| 560 | //exporter->ExportBspViewCellPartition(*mBspTree, 0);
|
---|
[379] | 561 | delete exporter;
|
---|
| 562 | }
|
---|
| 563 | cout << "finished" << endl;
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 | cout << "starting post processing using " << (int)mSampleRays.size() << " samples ... ";
|
---|
[375] | 567 |
|
---|
[372] | 568 | long startTime = GetTime();
|
---|
| 569 | int merged = PostprocessViewCells(mSampleRays);
|
---|
| 570 |
|
---|
| 571 | cout << "finished" << endl;
|
---|
| 572 | cout << "merged " << merged << " view cells in "
|
---|
| 573 | << TimeDiff(startTime, GetTime()) *1e-3 << " secs" << endl;
|
---|
| 574 |
|
---|
| 575 | //-- recount pvs
|
---|
[375] | 576 | mBspTree->EvaluateViewCellsStats(stat);
|
---|
| 577 |
|
---|
| 578 | Debug << "after post processing:\n" << stat << endl;
|
---|
[372] | 579 |
|
---|
[378] | 580 | //-- render simulation
|
---|
| 581 | cout << "\nevaluating render time after merge ... ";
|
---|
| 582 |
|
---|
| 583 | rt = SimulateRendering();
|
---|
[372] | 584 |
|
---|
[378] | 585 | cout << "render time: " << rt * 1e-3 << endl;
|
---|
[372] | 586 | Debug << "render time: " << rt * 1e-3 << endl;
|
---|
[379] | 587 |
|
---|
| 588 | if (1) // export view cells
|
---|
| 589 | {
|
---|
| 590 | cout << "exporting view cells after merge ... ";
|
---|
| 591 | Exporter *exporter = Exporter::GetExporter("merged_view_cells.x3d");
|
---|
| 592 | if (exporter)
|
---|
| 593 | {
|
---|
[380] | 594 | exporter->ExportBspViewCellPartition(*mBspTree, stat.maxPvs);
|
---|
| 595 | //exporter->ExportBspViewCellPartition(*mBspTree, 0);
|
---|
[379] | 596 | delete exporter;
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | cout << "finished" << endl;
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | //-- visualization of the bsp splits
|
---|
| 603 | bool exportSplits = false;
|
---|
| 604 | environment->GetBoolValue("BspTree.exportSplits", exportSplits);
|
---|
| 605 |
|
---|
| 606 |
|
---|
| 607 | cout << "exporting splits ... ";
|
---|
| 608 | if (exportSplits)
|
---|
| 609 | ExportSplits(objects);
|
---|
| 610 | cout << "finished" << endl;
|
---|
| 611 |
|
---|
| 612 | // export the PVS of sample view cells
|
---|
| 613 | if (1)
|
---|
| 614 | ExportBspPvs(objects);
|
---|
[372] | 615 | }
|
---|
| 616 |
|
---|
| 617 | // HoleSamplingPass();
|
---|
| 618 | if (0) {
|
---|
| 619 | Exporter *exporter = Exporter::GetExporter("ray-density.x3d");
|
---|
| 620 | exporter->SetExportRayDensity(true);
|
---|
| 621 | exporter->ExportKdTree(*mKdTree);
|
---|
| 622 |
|
---|
| 623 | if (mBspTree && (ViewCell::sHierarchy == ViewCell::BSP))
|
---|
| 624 | exporter->ExportBspTree(*mBspTree);
|
---|
| 625 |
|
---|
| 626 | delete exporter;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | bool exportRays = false;
|
---|
| 630 | if (exportRays) {
|
---|
| 631 | Exporter *exporter = NULL;
|
---|
| 632 | exporter = Exporter::GetExporter("sample-rays.x3d");
|
---|
| 633 | exporter->SetWireframe();
|
---|
| 634 | exporter->ExportKdTree(*mKdTree);
|
---|
| 635 | exporter->ExportBspTree(*mBspTree);
|
---|
| 636 |
|
---|
| 637 | for (i=0; i < pvsOut; i++)
|
---|
| 638 | exporter->ExportRays(rays[i], 1000, RgbColor(1, 0, 0));
|
---|
| 639 | exporter->SetFilled();
|
---|
| 640 |
|
---|
| 641 | delete exporter;
|
---|
| 642 | }
|
---|
| 643 |
|
---|
| 644 | //-- several visualizations and statistics
|
---|
| 645 | if (1) {
|
---|
[379] | 646 |
|
---|
[372] | 647 | for (int k=0; k < pvsOut; k++) {
|
---|
| 648 | Intersectable *object = objects[k];
|
---|
| 649 | char s[64];
|
---|
| 650 | sprintf(s, "sample-pvs%04d.x3d", k);
|
---|
| 651 | Exporter *exporter = Exporter::GetExporter(s);
|
---|
| 652 | exporter->SetWireframe();
|
---|
| 653 |
|
---|
| 654 |
|
---|
| 655 | KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
|
---|
| 656 | Intersectable::NewMail();
|
---|
| 657 |
|
---|
| 658 | // avoid adding the object to the list
|
---|
| 659 | object->Mail();
|
---|
| 660 | ObjectContainer visibleObjects;
|
---|
| 661 |
|
---|
| 662 | for (; i != object->mKdPvs.mEntries.end(); i++)
|
---|
| 663 | {
|
---|
| 664 | KdNode *node = (*i).first;
|
---|
| 665 | exporter->ExportBox(mKdTree->GetBox(node));
|
---|
| 666 | mKdTree->CollectObjects(node, visibleObjects);
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 | exporter->ExportRays(rays[k], 1000, RgbColor(0, 1, 0));
|
---|
| 670 | exporter->SetFilled();
|
---|
| 671 |
|
---|
| 672 | for (int j = 0; j < visibleObjects.size(); j++)
|
---|
| 673 | exporter->ExportIntersectable(visibleObjects[j]);
|
---|
| 674 |
|
---|
| 675 |
|
---|
| 676 | Material m;
|
---|
| 677 | m.mDiffuseColor = RgbColor(1, 0, 0);
|
---|
| 678 | exporter->SetForcedMaterial(m);
|
---|
| 679 | exporter->ExportIntersectable(object);
|
---|
| 680 |
|
---|
| 681 | delete exporter;
|
---|
| 682 | }
|
---|
| 683 | }
|
---|
| 684 |
|
---|
| 685 | return true;
|
---|
[362] | 686 | }
|
---|
[349] | 687 |
|
---|
[380] | 688 | void SamplingPreprocessor::ProcessBspViewCells(Ray &ray,
|
---|
[372] | 689 | Intersectable *object,
|
---|
| 690 | int faceIndex,
|
---|
| 691 | int &contributingSamples,
|
---|
| 692 | int &sampleContributions)
|
---|
| 693 | {
|
---|
| 694 | // save rays for bsp tree construction
|
---|
[380] | 695 | if (!mBspTree)
|
---|
[372] | 696 | {
|
---|
[380] | 697 | if ((BspTree::sConstructionMethod == BspTree::FROM_RAYS) &&
|
---|
| 698 | ((int)mSampleRays.size() < mBspConstructionSamples))
|
---|
| 699 | {
|
---|
| 700 | // also add origin to sample in order to extract it as input polygons
|
---|
| 701 | MeshInstance *mi = dynamic_cast<MeshInstance *>(object);
|
---|
| 702 | ray.sourceObject = Ray::Intersection(0.0, mi, faceIndex);
|
---|
[372] | 703 |
|
---|
[380] | 704 | mSampleRays.push_back(new Ray(ray));
|
---|
| 705 | Debug << "abba " << mSampleRays.size() << endl;
|
---|
| 706 | }
|
---|
| 707 | else
|
---|
| 708 | {
|
---|
| 709 | // construct BSP tree using the samples
|
---|
| 710 | cout << "building bsp tree from " << mSampleRays.size() << " samples " << endl;
|
---|
| 711 | BuildBspTree();
|
---|
[372] | 712 |
|
---|
[380] | 713 | // add contributions of saved samples to PVS
|
---|
| 714 | contributingSamples += mBspTree->GetStat().contributingSamples;
|
---|
| 715 | sampleContributions += mBspTree->GetStat().sampleContributions;
|
---|
[372] | 716 |
|
---|
[380] | 717 | BspTreeStatistics(Debug);
|
---|
[372] | 718 |
|
---|
[380] | 719 | if (0) Export("vc_bsptree.x3d", false, false, true);
|
---|
[372] | 720 |
|
---|
[380] | 721 | // throw away samples because BSP leaves not stored in order
|
---|
| 722 | // Need ordered rays for post processing => collect new rays
|
---|
| 723 | CLEAR_CONTAINER(mSampleRays);
|
---|
| 724 | }
|
---|
[372] | 725 | }
|
---|
[380] | 726 | // save rays for post processing
|
---|
| 727 | else if ((int)mSampleRays.size() < mPostProcessSamples)
|
---|
[372] | 728 | {
|
---|
[380] | 729 | Debug << "police " << mSampleRays.size() << endl;
|
---|
[372] | 730 | mSampleRays.push_back(new Ray(ray));
|
---|
| 731 | }
|
---|
[362] | 732 | }
|
---|
| 733 |
|
---|
[372] | 734 | // merge or subdivide view cells
|
---|
| 735 | int SamplingPreprocessor::PostprocessViewCells(const RayContainer &rays)
|
---|
| 736 | {
|
---|
| 737 | int merged = 0;
|
---|
[375] | 738 |
|
---|
[372] | 739 | RayContainer::const_iterator rit, rit_end = rays.end();
|
---|
| 740 | vector<Ray::BspIntersection>::const_iterator iit;
|
---|
| 741 |
|
---|
| 742 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
| 743 | {
|
---|
| 744 | // traverse leaves stored in the rays and compare and merge consecutive
|
---|
| 745 | // leaves (i.e., the neighbors in the tree)
|
---|
| 746 | if ((*rit)->bspIntersections.empty())
|
---|
| 747 | continue;
|
---|
| 748 |
|
---|
| 749 | iit = (*rit)->bspIntersections.begin();
|
---|
| 750 |
|
---|
| 751 | BspLeaf *previousLeaf = (*iit).mLeaf;
|
---|
| 752 | ++ iit;
|
---|
| 753 |
|
---|
| 754 | for (; iit != (*rit)->bspIntersections.end(); ++ iit)
|
---|
| 755 | {
|
---|
| 756 | BspLeaf *leaf = (*iit).mLeaf;
|
---|
| 757 |
|
---|
| 758 | if (mBspTree->ShouldMerge(leaf, previousLeaf))
|
---|
| 759 | {
|
---|
| 760 | mBspTree->MergeViewCells(leaf, previousLeaf);
|
---|
[375] | 761 |
|
---|
[372] | 762 | ++ merged;
|
---|
| 763 | }
|
---|
| 764 | previousLeaf = leaf;
|
---|
| 765 | }
|
---|
| 766 | }
|
---|
| 767 |
|
---|
| 768 | return merged;
|
---|
| 769 | }
|
---|
| 770 |
|
---|
[349] | 771 | void SamplingPreprocessor::ExportSplits(const ObjectContainer &objects)
|
---|
| 772 | {
|
---|
| 773 | Exporter *exporter = Exporter::GetExporter("bsp_splits.x3d");
|
---|
[372] | 774 |
|
---|
| 775 | if (exporter)
|
---|
| 776 | {
|
---|
[349] | 777 | Material m;
|
---|
| 778 | m.mDiffuseColor = RgbColor(1, 0, 0);
|
---|
| 779 | exporter->SetForcedMaterial(m);
|
---|
| 780 | exporter->SetWireframe();
|
---|
| 781 | exporter->ExportBspSplits(*mBspTree);
|
---|
[372] | 782 |
|
---|
[349] | 783 | // take forced material, else big scenes cannot be viewed
|
---|
| 784 | m.mDiffuseColor = RgbColor(0, 1, 0);
|
---|
| 785 | exporter->SetForcedMaterial(m);
|
---|
| 786 | exporter->SetFilled();
|
---|
| 787 |
|
---|
| 788 | exporter->ResetForcedMaterial();
|
---|
| 789 |
|
---|
| 790 | // export rays
|
---|
| 791 | if (0)
|
---|
| 792 | {
|
---|
| 793 | RayContainer outRays;
|
---|
| 794 |
|
---|
| 795 | for (int i = 0; i < mSampleRays.size(); ++ i)
|
---|
| 796 | {
|
---|
| 797 | // only rays piercing geometry
|
---|
| 798 | if (!mSampleRays[i]->intersections.empty())
|
---|
| 799 | outRays.push_back(mSampleRays[i]);
|
---|
| 800 | }
|
---|
| 801 | if (BspTree::sConstructionMethod == BspTree::FROM_RAYS)
|
---|
| 802 | {
|
---|
| 803 | // export rays
|
---|
| 804 | exporter->ExportRays(outRays, 1000, RgbColor(1, 1, 0));
|
---|
| 805 | }
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | // export scene geometry
|
---|
[352] | 809 | if (0)
|
---|
[349] | 810 | {
|
---|
[372] | 811 | Material m;//= RandomMaterial();
|
---|
| 812 | m.mDiffuseColor = RgbColor(0, 1, 0);
|
---|
| 813 | exporter->SetForcedMaterial(m);
|
---|
| 814 | exporter->SetWireframe();
|
---|
| 815 |
|
---|
| 816 | for (int j = 0; j < objects.size(); ++ j)
|
---|
| 817 | exporter->ExportIntersectable(objects[j]);
|
---|
| 818 | }
|
---|
| 819 |
|
---|
| 820 | delete exporter;
|
---|
| 821 | }
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 | void SamplingPreprocessor::ExportBspPvs(const ObjectContainer &objects)
|
---|
| 825 | {
|
---|
| 826 | //-- some random view cells and rays for output
|
---|
| 827 | const int leafOut = 10;
|
---|
| 828 |
|
---|
| 829 | vector<Ray> vcRays[leafOut];
|
---|
| 830 | vector<BspLeaf *> bspLeaves;
|
---|
| 831 |
|
---|
| 832 | for (int i = 0; i < leafOut; ++ i)
|
---|
| 833 | bspLeaves.push_back(mBspTree->GetRandomLeaf());
|
---|
| 834 |
|
---|
| 835 | const int raysOut = min((int)mSampleRays.size(), 20000);
|
---|
| 836 |
|
---|
[375] | 837 | ViewCell::NewMail();
|
---|
| 838 |
|
---|
| 839 | for (int i = 0; i < bspLeaves.size(); ++ i)
|
---|
[372] | 840 | {
|
---|
[375] | 841 | cout << "creating output for view cell " << i << " ... ";
|
---|
| 842 | // check whether we can add the current ray to the output rays
|
---|
| 843 | for (int k = 0; k < raysOut; ++ k)
|
---|
[372] | 844 | {
|
---|
[375] | 845 | Ray *ray = mSampleRays[k];
|
---|
[372] | 846 |
|
---|
[375] | 847 | for (int j = 0; j < (int)ray->bspIntersections.size(); ++ j)
|
---|
[372] | 848 | {
|
---|
[375] | 849 | BspLeaf *leaf = ray->bspIntersections[j].mLeaf;
|
---|
| 850 |
|
---|
[372] | 851 | if (bspLeaves[i]->GetViewCell() == leaf->GetViewCell())
|
---|
| 852 | {
|
---|
| 853 | vcRays[i].push_back(*ray);
|
---|
| 854 | }
|
---|
| 855 | }
|
---|
| 856 | }
|
---|
| 857 |
|
---|
| 858 | Intersectable::NewMail();
|
---|
| 859 |
|
---|
| 860 | ViewCell *vc = bspLeaves[i]->GetViewCell();
|
---|
| 861 |
|
---|
| 862 | //bspLeaves[j]->Mail();
|
---|
| 863 | char s[64]; sprintf(s, "bsp-pvs%04d.x3d", i);
|
---|
| 864 |
|
---|
| 865 | Exporter *exporter = Exporter::GetExporter(s);
|
---|
| 866 | exporter->SetFilled();
|
---|
| 867 |
|
---|
| 868 | ViewCellPvsMap::iterator it = vc->GetPvs().mEntries.begin();
|
---|
| 869 |
|
---|
| 870 | exporter->SetWireframe();
|
---|
| 871 |
|
---|
| 872 | Material m;//= RandomMaterial();
|
---|
| 873 | m.mDiffuseColor = RgbColor(0, 1, 0);
|
---|
| 874 | exporter->SetForcedMaterial(m);
|
---|
| 875 |
|
---|
| 876 | if (vc->GetMesh())
|
---|
| 877 | exporter->ExportViewCell(vc);
|
---|
| 878 | else
|
---|
| 879 | {
|
---|
| 880 | PolygonContainer cell;
|
---|
| 881 | // export view cell
|
---|
| 882 | mBspTree->ConstructGeometry(bspLeaves[i]->GetViewCell(), cell);
|
---|
| 883 | exporter->ExportPolygons(cell);
|
---|
| 884 | CLEAR_CONTAINER(cell);
|
---|
| 885 | }
|
---|
| 886 |
|
---|
| 887 | Debug << i << ": pvs size=" << (int)vc->GetPvs().GetSize()
|
---|
| 888 | << ", piercing rays=" << (int)vcRays[i].size() << endl;
|
---|
| 889 |
|
---|
| 890 | // export view cells
|
---|
| 891 | if (0)
|
---|
| 892 | {
|
---|
| 893 | m.mDiffuseColor = RgbColor(1, 0, 1);
|
---|
| 894 | exporter->SetForcedMaterial(m);
|
---|
| 895 | exporter->ExportViewCells(mViewCells);
|
---|
| 896 | }
|
---|
| 897 |
|
---|
| 898 | // export rays piercing this view cell
|
---|
| 899 | exporter->ExportRays(vcRays[i], 1000, RgbColor(0, 1, 0));
|
---|
| 900 |
|
---|
| 901 | m.mDiffuseColor = RgbColor(1, 0, 0);
|
---|
| 902 | exporter->SetForcedMaterial(m);
|
---|
| 903 |
|
---|
| 904 | // output PVS of view cell
|
---|
| 905 | for (; it != vc->GetPvs().mEntries.end(); ++ it)
|
---|
| 906 | {
|
---|
| 907 | Intersectable *intersect = (*it).first;
|
---|
| 908 | if (!intersect->Mailed())
|
---|
| 909 | {
|
---|
| 910 | exporter->ExportIntersectable(intersect);
|
---|
| 911 | intersect->Mail();
|
---|
| 912 | }
|
---|
| 913 | }
|
---|
| 914 |
|
---|
| 915 | // output rest of the objects
|
---|
| 916 | if (0)
|
---|
| 917 | {
|
---|
| 918 | Material m;//= RandomMaterial();
|
---|
| 919 | m.mDiffuseColor = RgbColor(0, 0, 1);
|
---|
| 920 | exporter->SetForcedMaterial(m);
|
---|
| 921 |
|
---|
| 922 | for (int j = 0; j < objects.size(); ++ j)
|
---|
| 923 | if (!objects[j]->Mailed())
|
---|
| 924 | {
|
---|
| 925 | exporter->SetForcedMaterial(m);
|
---|
| 926 | exporter->ExportIntersectable(objects[j]);
|
---|
| 927 | objects[j]->Mail();
|
---|
| 928 | }
|
---|
| 929 | }
|
---|
| 930 | DEL_PTR(exporter);
|
---|
[375] | 931 | cout << "finished" << endl;
|
---|
[372] | 932 | }
|
---|
| 933 | }
|
---|
| 934 |
|
---|
[373] | 935 |
|
---|
| 936 | Real SamplingPreprocessor::RenderPvs(ViewCell &viewCell,
|
---|
| 937 | const float objRenderTime) const
|
---|
[372] | 938 | {
|
---|
[373] | 939 | return viewCell.GetPvs().GetSize() * objRenderTime;
|
---|
| 940 | }
|
---|
| 941 |
|
---|
| 942 | Real SamplingPreprocessor::SimulateRendering()
|
---|
| 943 | {
|
---|
[372] | 944 | Real renderTime = 0;
|
---|
| 945 |
|
---|
[373] | 946 | // render time for 1 object of PVS
|
---|
| 947 | const float objRt = 1.0f;
|
---|
| 948 | // const overhead for crossing a view cell border
|
---|
| 949 | const float vcOverhead = 0.01f;
|
---|
[372] | 950 |
|
---|
[379] | 951 | // total area of view cells
|
---|
| 952 | float totalArea = 0;//= mKdTree->GetBox().SurfaceArea();
|
---|
[372] | 953 |
|
---|
| 954 | ViewCellContainer viewCells;
|
---|
| 955 |
|
---|
| 956 | mBspTree->CollectViewCells(viewCells);
|
---|
| 957 |
|
---|
| 958 | ViewCellContainer::const_iterator it, it_end = viewCells.end();
|
---|
| 959 | PolygonContainer::const_iterator pit;
|
---|
| 960 |
|
---|
| 961 | for (it = viewCells.begin(); it != it_end; ++ it)
|
---|
| 962 | {
|
---|
| 963 | // surface area substitute for probability
|
---|
| 964 | PolygonContainer cell;
|
---|
| 965 | float area = 0;
|
---|
| 966 |
|
---|
| 967 | mBspTree->ConstructGeometry(dynamic_cast<BspViewCell *>(*it), cell);
|
---|
| 968 |
|
---|
| 969 | for (pit = cell.begin(); pit != cell.end(); ++ pit)
|
---|
| 970 | area += (*pit)->GetArea();
|
---|
| 971 |
|
---|
[373] | 972 | renderTime += area * RenderPvs(*(*it), objRt);
|
---|
[372] | 973 | totalArea += area;
|
---|
| 974 | }
|
---|
| 975 |
|
---|
| 976 | renderTime /= totalArea;
|
---|
| 977 |
|
---|
[378] | 978 | Debug << "render time without overhead: " << renderTime * 1e-3 << endl;
|
---|
| 979 |
|
---|
[372] | 980 | renderTime += (float)viewCells.size() * vcOverhead;
|
---|
[378] | 981 |
|
---|
[372] | 982 | return renderTime;
|
---|
[373] | 983 | } |
---|