[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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[439] | 9 | #include "ViewCellsManager.h"
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[406] | 10 | #include "RenderSimulator.h"
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[372] | 11 |
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[860] | 12 |
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[1221] | 13 |
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[863] | 14 | namespace GtpVisibilityPreprocessor {
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[860] | 15 |
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| 16 |
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[411] | 17 | SamplingPreprocessor::SamplingPreprocessor(): mPass(0)
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[372] | 18 | {
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| 19 | // this should increase coherence of the samples
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[1199] | 20 | Environment::GetSingleton()->GetIntValue("SamplingPreprocessor.samplesPerPass", mSamplesPerPass);
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| 21 | Environment::GetSingleton()->GetIntValue("SamplingPreprocessor.totalSamples", mTotalSamples);
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| 22 |
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[372] | 23 | mStats.open("stats.log");
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| 24 | }
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| 25 |
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| 26 | SamplingPreprocessor::~SamplingPreprocessor()
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| 27 | {
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[1199] | 28 | CLEAR_CONTAINER(mSampleRays);
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| 29 | CLEAR_CONTAINER(mVssSampleRays);
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[372] | 30 | }
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| 31 |
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[1199] | 32 | Intersectable *
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| 33 | SamplingPreprocessor::CastRay(
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| 34 | const Vector3 &origin,
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| 35 | const Vector3 &direction
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| 36 | )
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[372] | 37 | {
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[1199] | 38 | static Ray ray;
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| 39 | AxisAlignedBox3 box = mViewCellsManager->GetViewSpaceBox();
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[440] | 40 |
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[1199] | 41 | AxisAlignedBox3 sbox = box;
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| 42 | sbox.Enlarge(Vector3(-Limits::Small));
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| 43 | if (!sbox.IsInside(origin))
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| 44 | return 0;
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| 45 |
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| 46 | ray.intersections.clear();
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| 47 | // do not store anything else then intersections at the ray
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| 48 | ray.Init(origin, direction, Ray::LOCAL_RAY);
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[444] | 49 |
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[1199] | 50 | ray.mFlags &= ~Ray::CULL_BACKFACES;
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| 51 |
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| 52 |
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| 53 |
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| 54 | // cast ray to KD tree to find intersection with other objects
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| 55 | Intersectable *objectA = NULL;
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| 56 | Vector3 pointA;
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| 57 | float bsize = Magnitude(box.Size());
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| 58 |
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| 59 | if (mKdTree->CastRay(ray)) {
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| 60 | if (!mDetectEmptyViewSpace || DotProd(ray.intersections[0].mNormal, direction) < 0) {
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| 61 | objectA = ray.intersections[0].mObject;
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| 62 | pointA = ray.Extrap(ray.intersections[0].mT);
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| 63 | }
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| 64 | }
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| 65 | return objectA;
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[372] | 66 | }
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| 67 |
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[429] | 68 | void
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| 69 | SamplingPreprocessor::HoleSamplingPass()
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| 70 | {
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| 71 | vector<KdLeaf *> leaves;
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| 72 | mKdTree->CollectLeaves(leaves);
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| 73 |
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| 74 | // go through all the leaves and evaluate their passing contribution
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| 75 | for (int i=0 ; i < leaves.size(); i++) {
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| 76 | KdLeaf *leaf = leaves[i];
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| 77 | cout<<leaf->mPassingRays<<endl;
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| 78 | }
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| 79 | }
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| 80 |
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[372] | 81 |
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| 82 | void
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| 83 | SamplingPreprocessor::VerifyVisibility(Intersectable *object)
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| 84 | {
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| 85 | // mail all nodes from the pvs
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[1199] | 86 | Intersectable::NewMail();
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| 87 | KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
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| 88 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 89 | KdNode *node = (*i).first;
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| 90 | node->Mail();
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| 91 | }
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| 92 | Debug << "Get all neighbours from PVS" << endl;
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| 93 | vector<KdNode *> invisibleNeighbors;
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| 94 | // get all neighbors of all PVS nodes
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| 95 | i = object->mKdPvs.mEntries.begin();
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| 96 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 97 | KdNode *node = (*i).first;
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| 98 | mKdTree->FindNeighbors(node, invisibleNeighbors, true);
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| 99 | AxisAlignedBox3 box = object->GetBox();
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| 100 | for (int j=0; j < invisibleNeighbors.size(); j++) {
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| 101 | int visibility = ComputeBoxVisibility(mSceneGraph,
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| 102 | mKdTree,
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| 103 | box,
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| 104 | mKdTree->GetBox(invisibleNeighbors[j]),
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| 105 | 1e-6f);
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| 106 | // exit(0);
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[372] | 107 | }
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[1199] | 108 | // now rank all the neighbors according to probability that a new
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| 109 | // sample creates some contribution
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| 110 | }
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[372] | 111 | }
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| 112 |
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| 113 | bool
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| 114 | SamplingPreprocessor::ComputeVisibility()
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| 115 | {
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| 116 |
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[1199] | 117 | Debug << "type: sampling" << endl;
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[487] | 118 |
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[1199] | 119 | cout<<"Sampling Preprocessor started\n"<<flush;
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| 120 | // cout<<"Memory/ray "<<sizeof(VssRay)+sizeof(RssTreeNode::RayInfo)<<endl;
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[372] | 121 |
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[1199] | 122 | Randomize(0);
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| 123 |
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[372] | 124 | long startTime = GetTime();
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| 125 |
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| 126 | int totalSamples = 0;
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| 127 |
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[1199] | 128 | // if not already loaded, construct view cells from file
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| 129 | if (!mLoadViewCells)
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| 130 | {
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| 131 | mViewCellsManager->SetViewSpaceBox(mKdTree->GetBox());
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[372] | 132 |
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[1199] | 133 | // construct view cells using it's own set of samples
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| 134 | mViewCellsManager->Construct(this);
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| 135 |
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| 136 | //-- several visualizations and statistics
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| 137 | Debug << "view cells construction finished: " << endl;
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| 138 | mViewCellsManager->PrintStatistics(Debug);
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| 139 | }
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| 140 |
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[372] | 141 |
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[1199] | 142 |
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| 143 | int samples = 0;
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| 144 | int i=0;
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| 145 | while (samples < mTotalSamples) {
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| 146 | for (i=0; i < mSamplesPerPass; i++, samples++) {
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| 147 |
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| 148 | if (i%10000 == 0)
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| 149 | cout<<"+";
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| 150 |
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| 151 | Vector3 origin, direction;
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| 152 | mViewCellsManager->GetViewPoint(origin);
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| 153 | direction = UniformRandomVector();
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[372] | 154 |
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[1199] | 155 |
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| 156 | ViewCell *viewcell = mViewCellsManager->GetViewCell(origin);
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| 157 |
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| 158 | if (viewcell && viewcell->GetValid()) {
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| 159 | // cast rays in both directions to make the number of samples comparable
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| 160 | // with the global sampling method which also casts a "double" ray per sample
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| 161 | for (int j=0; j < 2; j++) {
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| 162 | Intersectable *object = CastRay(origin, direction);
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| 163 | if (object) {
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| 164 | // if ray not outside of view space
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| 165 | float contribution;
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| 166 | int pvsContribution = 0;
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| 167 | float relativePvsContribution = 0;
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| 168 | if (object) {
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| 169 | float pdf = 1.0f;
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| 170 | if (viewcell->GetPvs().GetSampleContribution(object,
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| 171 | pdf,
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| 172 | contribution))
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| 173 | ++pvsContribution;
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| 174 | relativePvsContribution += contribution;
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| 175 | viewcell->GetPvs().AddSample(object, pdf);
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[372] | 176 | }
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[1199] | 177 | }
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| 178 | direction = -direction;
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[372] | 179 | }
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[1199] | 180 | }
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| 181 |
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| 182 | if (samples > mTotalSamples)
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| 183 | break;
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[372] | 184 | }
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| 185 |
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[1199] | 186 | // mVssRays.PrintStatistics(mStats);
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| 187 | mStats <<
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| 188 | "#Time\n" << TimeDiff(startTime, GetTime())*1e-3<<endl<<
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| 189 | "#TotalSamples\n" <<samples<<endl;
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| 190 |
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| 191 | mViewCellsManager->PrintPvsStatistics(mStats);
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| 192 | // ComputeRenderError();
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| 193 | }
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| 194 |
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[372] | 195 | // HoleSamplingPass();
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| 196 | if (0) {
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[1199] | 197 | Exporter *exporter = Exporter::GetExporter("ray-density.x3d");
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| 198 | exporter->SetExportRayDensity(true);
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| 199 | exporter->ExportKdTree(*mKdTree);
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| 200 | delete exporter;
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[422] | 201 | }
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[452] | 202 |
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[1199] | 203 |
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[466] | 204 | // $$JB temporary removed
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| 205 | // mViewCellsManager->PostProcess(objects, mSampleRays);
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[452] | 206 |
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| 207 | //-- several visualizations and statistics
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[475] | 208 | Debug << "view cells after post processing: " << endl;
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[452] | 209 | mViewCellsManager->PrintStatistics(Debug);
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[1199] | 210 |
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[448] | 211 | //-- render simulation after merge
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| 212 | cout << "\nevaluating bsp view cells render time after merge ... ";
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| 213 |
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[1199] | 214 | mRenderSimulator->RenderScene();
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| 215 | SimulationStatistics ss;
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| 216 | mRenderSimulator->GetStatistics(ss);
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[468] | 217 |
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[1199] | 218 | cout << " finished" << endl;
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| 219 | cout << ss << endl;
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| 220 | Debug << ss << endl;
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| 221 |
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[466] | 222 | // $$JB temporary removed
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| 223 | //mViewCellsManager->Visualize(objects, mSampleRays);
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[1199] | 224 |
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[441] | 225 | return true;
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[362] | 226 | }
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[349] | 227 |
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[441] | 228 |
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[362] | 229 | }
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