[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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[1743] | 11 | #include "VssRay.h"
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[1883] | 12 | #include "SamplingStrategy.h"
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[2035] | 13 | #include "RayCaster.h"
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[2709] | 14 | #include <windows.h>
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[372] | 15 |
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[860] | 16 |
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[863] | 17 | namespace GtpVisibilityPreprocessor {
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[860] | 18 |
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| 19 |
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[1292] | 20 | SamplingPreprocessor::SamplingPreprocessor(): Preprocessor(), mPass(0)
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[372] | 21 | {
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| 22 | // this should increase coherence of the samples
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[1199] | 23 |
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[372] | 24 | }
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| 25 |
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| 26 | SamplingPreprocessor::~SamplingPreprocessor()
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| 27 | {
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| 28 | }
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| 29 |
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[444] | 30 |
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[1520] | 31 |
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[372] | 32 |
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[429] | 33 | void
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[372] | 34 | SamplingPreprocessor::VerifyVisibility(Intersectable *object)
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| 35 | {
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[1579] | 36 | #if 0 // 6.10. 2006 due to kdPVS removal from intersectable
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| 37 | // mail all nodes from the pvs
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[1199] | 38 | Intersectable::NewMail();
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| 39 | KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
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| 40 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 41 | KdNode *node = (*i).first;
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| 42 | node->Mail();
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| 43 | }
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| 44 | Debug << "Get all neighbours from PVS" << endl;
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| 45 | vector<KdNode *> invisibleNeighbors;
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| 46 | // get all neighbors of all PVS nodes
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| 47 | i = object->mKdPvs.mEntries.begin();
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| 48 | for (; i != object->mKdPvs.mEntries.end(); i++) {
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| 49 | KdNode *node = (*i).first;
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| 50 | mKdTree->FindNeighbors(node, invisibleNeighbors, true);
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| 51 | AxisAlignedBox3 box = object->GetBox();
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| 52 | for (int j=0; j < invisibleNeighbors.size(); j++) {
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| 53 | int visibility = ComputeBoxVisibility(mSceneGraph,
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| 54 | mKdTree,
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| 55 | box,
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| 56 | mKdTree->GetBox(invisibleNeighbors[j]),
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| 57 | 1e-6f);
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| 58 | // exit(0);
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[372] | 59 | }
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[1199] | 60 | // now rank all the neighbors according to probability that a new
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| 61 | // sample creates some contribution
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| 62 | }
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[1579] | 63 | #endif
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[372] | 64 | }
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| 65 |
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| 66 | bool
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| 67 | SamplingPreprocessor::ComputeVisibility()
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| 68 | {
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[1199] | 69 | Debug << "type: sampling" << endl;
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| 70 | cout<<"Sampling Preprocessor started\n"<<flush;
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| 71 | // cout<<"Memory/ray "<<sizeof(VssRay)+sizeof(RssTreeNode::RayInfo)<<endl;
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[2653] | 72 |
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[1199] | 73 | Randomize(0);
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[1563] | 74 | const long startTime = GetTime();
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[372] | 75 | int totalSamples = 0;
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| 76 |
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[1199] | 77 | // if not already loaded, construct view cells from file
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[1715] | 78 | if (!mLoadViewCells) {
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| 79 | ConstructViewCells();
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[1199] | 80 | }
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[2653] | 81 |
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[1743] | 82 | int intersectables, faces;
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| 83 | mSceneGraph->GetStatistics(intersectables, faces);
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[1966] | 84 | HaltonSequence posHalton;
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[1743] | 85 |
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[2712] | 86 | mCurrentSamples = 0;
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[1966] | 87 | int rssSamples = 0;
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| 88 |
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| 89 | map<ViewCell *, HaltonSequence> dirHalton;
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[2035] | 90 | int lastEvaluation = 0;
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| 91 | SimpleRayContainer rays;
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| 92 | VssRayContainer vssRays;
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| 93 |
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[2712] | 94 | while (mCurrentSamples < mTotalSamples) {
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[2035] | 95 | for (int i=0; i < mSamplesPerPass;) {
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[2709] | 96 | while (mSynchronize)
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| 97 | {
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| 98 | // hack: sleep during walthrough computation
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| 99 | Sleep(1000);
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| 100 | }
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| 101 |
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[2035] | 102 | mRayCaster->InitPass();
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| 103 |
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[1966] | 104 | float r[5];
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| 105 | Vector3 origin, direction;
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| 106 | posHalton.GetNext(3, r);
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| 107 |
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| 108 | mViewCellsManager->GetViewPoint(origin, Vector3(r[0], r[1], r[2]));
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| 109 | ViewCell *viewcell = mViewCellsManager->GetViewCell(origin);
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| 110 |
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| 111 | if (!viewcell || !viewcell->GetValid())
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| 112 | continue;
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[2035] | 113 |
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| 114 | rays.clear();
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| 115 | vssRays.clear();
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| 116 |
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[1743] | 117 | for (; rays.size() < 16; ) {
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[2035] | 118 | if (i%100000 == 0) {
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[2712] | 119 | cout<<mCurrentSamples/1e6f<<"M rays, progress: "<<(mCurrentSamples * 100.0f)/mTotalSamples<<" % \r";
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[2035] | 120 | }
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[1743] | 121 |
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[1966] | 122 | dirHalton[viewcell].GetNext(2, r);
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| 123 | direction = UniformRandomVector(r[0],r[1]);
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| 124 | //direction = UniformRandomVector();
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[1743] | 125 |
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[1966] | 126 | // cast rays in both directions to make the number of samples comparable
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| 127 | // with the global sampling method which also casts a "double" ray per sample
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| 128 | rays.push_back(SimpleRay(origin,
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| 129 | direction,
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| 130 | SamplingStrategy::DIRECTION_BASED_DISTRIBUTION,
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| 131 | 1.0f));
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| 132 | i++;
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[2712] | 133 | mCurrentSamples ++;
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[1743] | 134 | }
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[1199] | 135 |
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[1743] | 136 | CastRays(rays,
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| 137 | vssRays,
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| 138 | true,
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[1966] | 139 | true);
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| 140 |
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[1743] | 141 |
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[2130] | 142 | rssSamples += (int)vssRays.size();
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[1771] | 143 | for (int j=0; j < vssRays.size(); j++)
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| 144 | if (vssRays[j]->mFlags & VssRay::Valid) {
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[2022] | 145 | Intersectable *obj = vssRays[j]->mTerminationObject;
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[1771] | 146 | if (obj) {
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| 147 | // if ray not outside of view space
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[1743] | 148 | float pdf = 1.0f;
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[1966] | 149 | // ViewCell *viewcell = viewcells[j/2];
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[2035] | 150 |
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[1966] | 151 | ObjectPvs &pvs = viewcell->GetPvs();
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| 152 | pvs.AddSampleDirtyCheck(obj, pdf);
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| 153 |
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| 154 | if (pvs.RequiresResort()) {
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| 155 | pvs.SimpleSort();
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| 156 | }
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[1771] | 157 | }
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[372] | 158 | }
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[1199] | 159 |
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[2712] | 160 | if (mCurrentSamples > mTotalSamples)
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[1199] | 161 | break;
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[372] | 162 | }
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[1743] | 163 |
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[2035] | 164 |
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[2712] | 165 | if (mCurrentSamples - lastEvaluation >= mSamplesPerEvaluation) {
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[2066] | 166 | Real time = TimeDiff(startTime, GetTime());
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[2035] | 167 | mViewCellsManager->PrintPvsStatistics(mStats);
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| 168 | mStats <<
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| 169 | "#Pass\n" <<mPass<<endl<<
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[2046] | 170 | "#Time\n" << time <<endl<<
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[2712] | 171 | "#TotalSamples\n" <<mCurrentSamples<<endl<<
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[2035] | 172 | "#RssSamples\n" <<rssSamples<<endl;
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[2712] | 173 | lastEvaluation = mCurrentSamples;
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[2046] | 174 |
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[2035] | 175 | if (renderer) {
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| 176 | ComputeRenderError();
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| 177 | }
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| 178 |
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| 179 | }
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[2049] | 180 |
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[2066] | 181 | Real time = TimeDiff(startTime, GetTime());
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[2049] | 182 | if (mTotalTime != -1 && time/1000 > mTotalTime)
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| 183 | break;
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| 184 |
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[1199] | 185 | }
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[1715] | 186 | if (0) {
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| 187 | Exporter *exporter = Exporter::GetExporter("ray-density.x3d");
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| 188 | exporter->SetExportRayDensity(true);
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| 189 | exporter->ExportKdTree(*mKdTree);
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| 190 | delete exporter;
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| 191 | }
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[2035] | 192 |
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| 193 |
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| 194 | // $$JB temporary removed
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[1715] | 195 | // mViewCellsManager->PostProcess(objects, mSampleRays);
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| 196 |
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| 197 | //-- several visualizations and statistics
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| 198 | Debug << "view cells after post processing: " << endl;
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| 199 | mViewCellsManager->PrintStatistics(Debug);
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| 200 |
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[1771] | 201 | EvalViewCellHistogram();
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| 202 |
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[1715] | 203 | //-- render simulation after merge
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| 204 | cout << "\nevaluating bsp view cells render time after merge ... ";
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| 205 |
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| 206 | mRenderSimulator->RenderScene();
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| 207 | SimulationStatistics ss;
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| 208 | mRenderSimulator->GetStatistics(ss);
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| 209 |
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| 210 | cout << " finished" << endl;
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| 211 | cout << ss << endl;
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| 212 | Debug << ss << endl;
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| 213 |
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| 214 | // $$JB temporary removed
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[466] | 215 | //mViewCellsManager->Visualize(objects, mSampleRays);
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[1715] | 216 |
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| 217 | return true;
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[362] | 218 | }
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[349] | 219 |
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[441] | 220 |
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[362] | 221 | }
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