[2546] | 1 | #include "SamplingStrategy.h"
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| 2 | #include "Ray.h"
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| 3 | #include "Intersectable.h"
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| 4 | #include "Preprocessor.h"
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| 5 | #include "ViewCellsManager.h"
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| 6 | #include "AxisAlignedBox3.h"
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| 7 | #include "RssTree.h"
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| 8 | #include "Vector2.h"
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| 9 | #include "RndGauss.h"
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| 10 | #include "Exporter.h"
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| 11 | #include "Environment.h"
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| 12 | #include "RayCaster.h"
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| 13 | #include "ReverseGvs.h"
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| 14 |
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| 15 |
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| 16 | #ifdef GTP_INTERNAL
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| 17 | #include "ArchModeler2MLRT.hxx"
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| 18 | #endif
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| 19 |
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| 20 | namespace GtpVisibilityPreprocessor {
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| 21 |
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| 22 | #define MUTATION_USE_CDF 0
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| 23 | #define EVALUATE_MUTATION_STATS 1
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| 24 | #define SORT_RAY_ENTRIES 1
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| 25 |
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| 26 | // use avg ray contribution as importance
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| 27 | // if 0 the importance is evaluated from the succ of mutations
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| 28 | #define USE_AVG_CONTRIBUTION 1
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| 29 |
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| 30 | ReverseGvs::RayEntry &
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| 31 | ReverseGvs::GetEntry(const int index)
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| 32 | {
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| 33 | #if SORT_RAY_ENTRIES
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| 34 | return mRays[index];
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| 35 | #else
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| 36 | return mRays[(mBufferStart+index)%mRays.size()];
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| 37 | #endif
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| 38 | }
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| 39 |
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| 40 | void
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| 41 | ReverseGvs::Update(VssRayContainer &vssRays)
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| 42 | {
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| 43 | // for (int i=0; i < mRays.size(); i++)
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| 44 | // cout<<mRays[i].mMutations<<" ";
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| 45 | // cout<<endl;
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| 46 | cerr<<"Mutation update..."<<endl;
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| 47 | cerr<<"rays = "<<mRays.size()<<endl;
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| 48 | if ((int)mRays.size()) {
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| 49 | cerr<<"Oversampling factors = "<<
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| 50 | GetEntry(0).mMutations<<" "<<
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| 51 | GetEntry(1).mMutations<<" "<<
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| 52 | GetEntry(2).mMutations<<" "<<
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| 53 | GetEntry(3).mMutations<<" "<<
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| 54 | GetEntry(4).mMutations<<" "<<
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| 55 | GetEntry(5).mMutations<<" ... "<<
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| 56 | GetEntry((int)mRays.size()-6).mMutations<<" "<<
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| 57 | GetEntry((int)mRays.size()-5).mMutations<<" "<<
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| 58 | GetEntry((int)mRays.size()-4).mMutations<<" "<<
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| 59 | GetEntry((int)mRays.size()-3).mMutations<<" "<<
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| 60 | GetEntry((int)mRays.size()-2).mMutations<<" "<<
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| 61 | GetEntry((int)mRays.size()-1).mMutations<<endl;
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| 62 | }
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| 63 | int contributingRays = 0;
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| 64 |
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| 65 | int mutationRays = 0;
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| 66 | int dummyNcMutations = 0;
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| 67 | int dummyCMutations = 0;
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| 68 |
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| 69 | int reverseCandidates = 0;
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| 70 |
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| 71 | #if 0
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| 72 | sort(mRays.begin(), mRays.end());
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| 73 | // reset the start of the buffer
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| 74 | mBufferStart = 0;
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| 75 | #endif
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| 76 |
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| 77 | for (int i=0; i < vssRays.size(); i++) {
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| 78 | if (vssRays[i]->mPvsContribution) {
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| 79 | // reset the counter of unsuccsseful mutation for a generating ray (if it exists)
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| 80 | if (vssRays[i]->mDistribution == MUTATION_BASED_DISTRIBUTION &&
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| 81 | vssRays[i]->mGeneratorId != -1
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| 82 | ) {
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| 83 | mRays[vssRays[i]->mGeneratorId].mUnsuccessfulMutations = 0;
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| 84 | #if EVALUATE_MUTATION_STATS
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| 85 | mutationRays++;
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| 86 |
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| 87 | Intersectable *newObject = vssRays[i]->mTerminationObject;
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| 88 |
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| 89 | Intersectable *oldObject = mRays[vssRays[i]->mGeneratorId].mRay->mTerminationObject;
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| 90 |
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| 91 | if (oldObject == newObject)
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| 92 | dummyCMutations++;
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| 93 | #endif
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| 94 | }
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| 95 | contributingRays++;
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| 96 | if (mRays.size() < mMaxRays) {
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| 97 | VssRay *newRay = new VssRay(*vssRays[i]);
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| 98 | // add this ray
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| 99 | newRay->Ref();
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| 100 | mRays.push_back(RayEntry(newRay));
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| 101 | } else {
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| 102 | // unref the old ray
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| 103 | *mRays[mBufferStart].mRay = *vssRays[i];
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| 104 | mRays[mBufferStart].mMutations = 0;
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| 105 | mRays[mBufferStart].mUnsuccessfulMutations = 0;
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| 106 | mRays[mBufferStart].ResetReverseMutation();
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| 107 | // mRays[mBufferStart] = RayEntry(newRay);
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| 108 | mBufferStart++;
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| 109 | if (mBufferStart >= mMaxRays)
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| 110 | mBufferStart = 0;
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| 111 | }
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| 112 | } else {
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| 113 | if (vssRays[i]->mDistribution == MUTATION_BASED_DISTRIBUTION &&
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| 114 | vssRays[i]->mGeneratorId != -1
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| 115 | ) {
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| 116 | // check whether not to store a new backward mutation candidate
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| 117 | VssRay *oldRay = mRays[vssRays[i]->mGeneratorId].mRay;
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| 118 | VssRay *newRay = vssRays[i];
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| 119 |
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| 120 |
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| 121 | Intersectable *oldObject = oldRay->mTerminationObject;
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| 122 |
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| 123 |
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| 124 | if (!mRays[newRay->mGeneratorId].HasReverseMutation()) {
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| 125 | if (DotProd(oldRay->GetDir(), newRay->GetDir()) > 0.0f) {
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| 126 | float oldDist = Magnitude(oldRay->mTermination - newRay->mOrigin);
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| 127 | float newDist = Magnitude(newRay->mTermination - newRay->mOrigin);
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| 128 |
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| 129 | if (newDist < oldDist - oldObject->GetBox().Radius()*mReverseSamplesDistance) {
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| 130 | Vector3 origin, termination;
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| 131 | if (ComputeReverseMutation(*oldRay, *newRay, origin, termination)) {
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| 132 | mRays[newRay->mGeneratorId].SetReverseMutation(origin, termination);
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| 133 | }
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| 134 |
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| 135 | reverseCandidates++;
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| 136 | //mReverseCandidates
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| 137 | }
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| 138 | }
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| 139 | }
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| 140 | #if EVALUATE_MUTATION_STATS
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| 141 | mutationRays++;
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| 142 |
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| 143 | Intersectable *newObject = vssRays[i]->mTerminationObject;
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| 144 |
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| 145 |
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| 146 | if (oldObject == newObject)
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| 147 | dummyNcMutations++;
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| 148 | #endif
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| 149 | }
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| 150 | }
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| 151 | }
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| 152 |
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| 153 | if (mutationRays) {
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| 154 | cout<<"Mutated rays:"<<mutationRays<<endl;
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| 155 | cout<<"Dummy mutations ratio:"<<100.0f*(dummyCMutations + dummyNcMutations)/
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| 156 | (float)mutationRays<<"%"<<endl;
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| 157 | cout<<"Dummy NC mutations ratio:"<<100.0f*dummyNcMutations/(float)mutationRays<<"%"<<endl;
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| 158 | cout<<"Dummy C mutations ratio:"<<100.0f*dummyCMutations/(float)mutationRays<<"%"<<endl;
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| 159 | cout<<"Reverse candidates:"<<reverseCandidates<<endl;
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| 160 | }
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| 161 |
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| 162 | float pContributingRays = contributingRays/(float)vssRays.size();
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| 163 |
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| 164 | cout<<"Percentage of contributing rays:"<<pContributingRays<<endl;
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| 165 |
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| 166 | if (mUseUnsuccCountImportance) {
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| 167 | // use unsucc mutation samples as feedback on importance
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| 168 | for (int i=0; i < mRays.size(); i++) {
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| 169 | const float minImportance = 0.1f;
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| 170 | const int minImportanceSamples = 20;
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| 171 | mRays[i].mImportance = minImportance +
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| 172 | (1-minImportance)*exp(-3.0f*mRays[i].mUnsuccessfulMutations/minImportanceSamples);
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| 173 | }
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| 174 | } else {
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| 175 | float importance = 1.0f;
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| 176 | if (mUsePassImportance)
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| 177 | importance = 1.0f/(pContributingRays + 1e-5);
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| 178 | // set this values for last contributingRays
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| 179 | int index = mBufferStart - 1;
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| 180 |
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| 181 | for (int i=0; i < contributingRays; i++, index--) {
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| 182 | if (index < 0)
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| 183 | index = (int)mRays.size()-1;
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| 184 | mRays[index].mImportance = importance;
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| 185 | }
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| 186 | }
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| 187 |
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| 188 | #if SORT_RAY_ENTRIES
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| 189 | long t1 = GetTime();
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| 190 | sort(mRays.begin(), mRays.end());
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| 191 | // reset the start of the buffer
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| 192 | mBufferStart = 0;
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| 193 | mLastIndex = (int)mRays.size();
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| 194 | cout<<"Mutation candidates sorted in "<<TimeDiff(t1, GetTime())<<" ms."<<endl;
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| 195 | #endif
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| 196 |
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| 197 | #if MUTATION_USE_CDF
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| 198 | // compute cdf
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| 199 | mRays[0].mCdf = mRays[0].mImportance/(mRays[0].mMutations+1);
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| 200 | for (int i=1; i < mRays.size(); i++)
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| 201 | mRays[i].mCdf = mRays[i-1].mCdf + mRays[i].mImportance/(mRays[i].mMutations+1);
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| 202 |
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| 203 | float scale = 1.0f/mRays[i-1].mCdf;
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| 204 | for (i=0; i < mRays.size(); i++) {
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| 205 | mRays[i].mCdf *= scale;
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| 206 | }
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| 207 | #endif
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| 208 |
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| 209 | cout<<"Importance = "<<
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| 210 | GetEntry(0).mImportance<<" "<<
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| 211 | GetEntry((int)mRays.size()-1).mImportance<<endl;
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| 212 |
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| 213 | cout<<"Sampling factor = "<<
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| 214 | GetEntry(0).GetSamplingFactor()<<" "<<
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| 215 | GetEntry((int)mRays.size()-1).GetSamplingFactor()<<endl;
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| 216 |
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| 217 | cerr<<"Mutation update done."<<endl;
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| 218 | }
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| 219 |
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| 220 |
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| 221 | Vector3
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| 222 | ReverseGvs::ComputeOriginMutation(const VssRay &ray,
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| 223 | const Vector3 &U,
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| 224 | const Vector3 &V,
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| 225 | const Vector2 vr2,
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| 226 | const float radius
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| 227 | )
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| 228 | {
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| 229 | #if 0
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| 230 | Vector3 v;
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| 231 | if (d.DrivingAxis() == 0)
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| 232 | v = Vector3(0, r[0]-0.5f, r[1]-0.5f);
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| 233 | else
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| 234 | if (d.DrivingAxis() == 1)
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| 235 | v = Vector3(r[0]-0.5f, 0, r[1]-0.5f);
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| 236 | else
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| 237 | v = Vector3(r[0]-0.5f, r[1]-0.5f, 0);
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| 238 | return v*(2*radius);
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| 239 | #endif
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| 240 | #if 0
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| 241 | return (U*(r[0] - 0.5f) + V*(r[1] - 0.5f))*(2*radius);
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| 242 | #endif
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| 243 |
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| 244 |
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| 245 | // Output random variable
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| 246 | Vector2 gaussvec2;
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| 247 |
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| 248 | // Here we apply transform to gaussian, so 2D bivariate
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| 249 | // normal distribution
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| 250 | // float sigma = ComputeSigmaFromRadius(radius);
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| 251 | float sigma = radius;
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| 252 | GaussianOn2D(vr2,
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| 253 | sigma, // input
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| 254 | gaussvec2); // output
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| 255 |
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| 256 |
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| 257 | // Here we tranform the point correctly to 3D space using base
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| 258 | // vectors of the 3D space defined by the direction
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| 259 | Vector3 shift = gaussvec2.xx * U + gaussvec2.yy * V;
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| 260 |
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| 261 | // cout<<shift<<endl;
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| 262 | return shift;
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| 263 | }
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| 264 |
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| 265 | Vector3
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| 266 | ReverseGvs::ComputeTerminationMutation(const VssRay &ray,
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| 267 | const Vector3 &U,
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| 268 | const Vector3 &V,
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| 269 | const Vector2 vr2,
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| 270 | const float radius
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| 271 | )
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| 272 | {
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| 273 | #if 0
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| 274 | Vector3 v;
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| 275 | // mutate the termination
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| 276 | if (d.DrivingAxis() == 0)
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| 277 | v = Vector3(0, r[2]-0.5f, r[3]-0.5f);
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| 278 | else
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| 279 | if (d.DrivingAxis() == 1)
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| 280 | v = Vector3(r[2]-0.5f, 0, r[3]-0.5f);
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| 281 | else
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| 282 | v = Vector3(r[2]-0.5f, r[3]-0.5f, 0);
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| 283 |
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| 284 | // Vector3 nv;
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| 285 |
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| 286 | // if (Magnitude(v) > Limits::Small)
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| 287 | // nv = Normalize(v);
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| 288 | // else
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| 289 | // nv = v;
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| 290 |
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| 291 | // v = nv*size + v*size;
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| 292 |
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| 293 | return v*(4.0f*radius);
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| 294 | #endif
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| 295 | #if 0
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| 296 | return (U*(vr2.xx - 0.5f) + V*(vr2.yy - 0.5f))*(4.0f*radius);
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| 297 | #endif
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| 298 | Vector2 gaussvec2;
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| 299 | #if 1
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| 300 | float sigma = radius;
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| 301 | GaussianOn2D(vr2,
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| 302 | sigma, // input
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| 303 | gaussvec2); // output
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| 304 | Vector3 shift = gaussvec2.xx * U + gaussvec2.yy * V;
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| 305 | // cout<<shift<<endl;
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| 306 | return shift;
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| 307 | #endif
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| 308 | #if 0
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| 309 | // Here we estimate standard deviation (sigma) from radius
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| 310 | float sigma = 1.1f*ComputeSigmaFromRadius(radius);
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| 311 | Vector3 vr3(vr2.xx, vr2.yy, RandomValue(0,1));
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| 312 | PolarGaussianOnDisk(vr3,
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| 313 | sigma,
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| 314 | radius, // input
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| 315 | gaussvec2); // output
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| 316 |
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| 317 | // Here we tranform the point correctly to 3D space using base
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| 318 | // vectors of the 3D space defined by the direction
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| 319 | Vector3 shift = gaussvec2.xx * U + gaussvec2.yy * V;
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| 320 |
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| 321 | // cout<<shift<<endl;
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| 322 | return shift;
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| 323 | #endif
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| 324 | }
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| 325 |
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| 326 | bool
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| 327 | ReverseGvs::ComputeReverseMutation(
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| 328 | const VssRay &oldRay,
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| 329 | const VssRay &newRay,
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| 330 | Vector3 &origin,
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| 331 | Vector3 &termination
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| 332 | )
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| 333 | {
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| 334 | #ifdef GTP_INTERNAL
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| 335 |
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| 336 | // first reconstruct the termination point
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| 337 | Vector3 oldDir = Normalize(oldRay.GetDir());
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| 338 | Plane3 oldPlane(oldDir, oldRay.mTermination);
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| 339 |
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| 340 | termination = oldPlane.FindIntersection(newRay.mOrigin,
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| 341 | newRay.mTermination);
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| 342 |
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| 343 | // now find the new origin of the ray by casting ray backward from the termination and termining
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| 344 | // silhouette point with respect to the occluding object (object containing the newRay termination)
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| 345 |
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| 346 | Plane3 newPlane(oldDir, newRay.mTermination);
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| 347 |
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| 348 | Vector3 oldPivot = newPlane.FindIntersection(oldRay.mOrigin,
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| 349 | oldRay.mTermination);
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| 350 |
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| 351 | Vector3 newPivot = newRay.mTermination;
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| 352 | Vector3 line = 2.0f*(oldPivot - newPivot);
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| 353 |
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| 354 | Intersectable *occluder = newRay.mTerminationObject;
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| 355 |
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| 356 | AxisAlignedBox3 box = occluder->GetBox();
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| 357 | box.Scale(2.0f);
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| 358 |
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| 359 | const int packetSize = 4;
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| 360 | static int hit_triangles[packetSize];
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| 361 | static float dist[packetSize];
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| 362 | static Vector3 dirs[packetSize];
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| 363 | static Vector3 shifts[packetSize];
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| 364 | // now find the silhouette along the line
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| 365 | int i;
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| 366 | float left = 0.0f;
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| 367 | float right = 1.0f;
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| 368 |
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| 369 | // cast rays to find silhouette ray
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| 370 | for (int j=0; j < mSilhouetteSearchSteps; j++) {
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| 371 | for (i=0; i < packetSize; i++) {
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| 372 | float r = left + (i+1)*(right-left)/(packetSize+1);
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| 373 | shifts[i] = r*line;
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| 374 | dirs[i] = Normalize(newPivot + shifts[i] - termination );
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| 375 | mlrtaStoreRayASEye4(&termination.x,
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| 376 | &dirs[i].x,
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| 377 | i);
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| 378 | }
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| 379 |
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| 380 | mlrtaTraverseGroupASEye4(&box.Min().x,
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| 381 | &box.Max().x,
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| 382 | hit_triangles,
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| 383 | dist);
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| 384 |
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| 385 | for (i=0; i < packetSize; i++) {
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| 386 | if (hit_triangles[i] == -1) {
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| 387 | // break on first passing ray
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| 388 | break;
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| 389 | }
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| 390 | }
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| 391 | float rr = left + (i+1)*(right-left)/(packetSize+1);
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| 392 | float rl = left + i*(right-left)/(packetSize+1);
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| 393 | left = rl;
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| 394 | right = rr;
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| 395 | }
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| 396 |
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| 397 | float t = right;
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| 398 | if (right==1.0f)
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| 399 | return false;
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| 400 |
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| 401 | if (i == packetSize)
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| 402 | origin = newPivot + right*line;
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| 403 | else
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| 404 | origin = newPivot + shifts[i];
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| 405 |
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| 406 | if (0) {
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| 407 |
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| 408 | static VssRayContainer rRays;
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| 409 | static int counter = 0;
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| 410 | char filename[256];
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| 411 |
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| 412 | if (counter < 50) {
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| 413 | sprintf(filename, "reverse_rays_%03d.x3d", counter++);
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| 414 |
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| 415 | VssRay tRay(origin, termination, NULL, NULL);
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| 416 | rRays.push_back((VssRay *)&oldRay);
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| 417 | rRays.push_back((VssRay *)&newRay);
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| 418 | rRays.push_back(&tRay);
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| 419 |
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| 420 | Exporter *exporter = NULL;
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| 421 | exporter = Exporter::GetExporter(filename);
|
---|
| 422 |
|
---|
| 423 | exporter->SetFilled();
|
---|
| 424 |
|
---|
| 425 | Intersectable *occludee =
|
---|
| 426 | oldRay.mTerminationObject;
|
---|
| 427 |
|
---|
| 428 | exporter->SetForcedMaterial(RgbColor(0,0,1));
|
---|
| 429 | exporter->ExportIntersectable(occluder);
|
---|
| 430 | exporter->SetForcedMaterial(RgbColor(0,1,0));
|
---|
| 431 | exporter->ExportIntersectable(occludee);
|
---|
| 432 | exporter->ResetForcedMaterial();
|
---|
| 433 |
|
---|
| 434 | exporter->SetWireframe();
|
---|
| 435 |
|
---|
| 436 |
|
---|
| 437 | exporter->ExportRays(rRays, RgbColor(1, 0, 0));
|
---|
| 438 | delete exporter;
|
---|
| 439 | rRays.clear();
|
---|
| 440 | }
|
---|
| 441 | }
|
---|
| 442 |
|
---|
| 443 | #else
|
---|
| 444 | cerr << "warning: reverse mutation not supported!" << endl;
|
---|
| 445 | #endif
|
---|
| 446 |
|
---|
| 447 | return true;
|
---|
| 448 |
|
---|
| 449 | // now the origin and termination is swapped compred to the generator ray
|
---|
| 450 | // swap(origin, termination);???
|
---|
| 451 | // -> perhaps not neccessary as the reverse mutation wil only be used once!
|
---|
| 452 | }
|
---|
| 453 |
|
---|
| 454 | Vector3
|
---|
| 455 | ReverseGvs::ComputeSilhouetteTerminationMutation(const VssRay &ray,
|
---|
| 456 | const Vector3 &origin,
|
---|
| 457 | const AxisAlignedBox3 &box,
|
---|
| 458 | const Vector3 &U,
|
---|
| 459 | const Vector3 &V,
|
---|
| 460 | const float radius
|
---|
| 461 | )
|
---|
| 462 | {
|
---|
| 463 | #ifdef GTP_INTERNAL
|
---|
| 464 |
|
---|
| 465 | const int packetSize = 4;
|
---|
| 466 | static int hit_triangles[packetSize];
|
---|
| 467 | static float dist[packetSize];
|
---|
| 468 | static Vector3 dirs[packetSize];
|
---|
| 469 | static Vector3 shifts[packetSize];
|
---|
| 470 | // mutate the
|
---|
| 471 | float alpha = RandomValue(0.0f, Real(2.0*M_PI));
|
---|
| 472 | //float alpha = vr2.x*2.0f*M_PI;
|
---|
| 473 |
|
---|
| 474 | // direction along which we will mutate the ray
|
---|
| 475 | Vector3 line = sin(alpha)*U + cos(alpha)*V;
|
---|
| 476 |
|
---|
| 477 | // cout<<line<<endl;
|
---|
| 478 | // create 16 rays along the selected dir
|
---|
| 479 | int i;
|
---|
| 480 | float left = 0.0f;
|
---|
| 481 | float right = radius;
|
---|
| 482 | // cast rays to find silhouette ray
|
---|
| 483 | for (int j=0; j < mSilhouetteSearchSteps; j++) {
|
---|
| 484 | for (i=0; i < packetSize; i++) {
|
---|
| 485 | float r = left + (i+1)*(right-left)/(packetSize+1);
|
---|
| 486 | shifts[i] = r*line;
|
---|
| 487 | dirs[i] = Normalize(ray.mTermination + shifts[i] - origin );
|
---|
| 488 | mlrtaStoreRayASEye4(&origin.x,
|
---|
| 489 | &dirs[i].x,
|
---|
| 490 | i);
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | mlrtaTraverseGroupASEye4(&box.Min().x,
|
---|
| 494 | &box.Max().x,
|
---|
| 495 | hit_triangles,
|
---|
| 496 | dist);
|
---|
| 497 |
|
---|
| 498 | for (i=0; i < packetSize; i++) {
|
---|
| 499 | if (hit_triangles[i] == -1) {
|
---|
| 500 | // if (hit_triangles[i] == -1 || !box.IsInside(origin + dist[i]*dirs[i])) {
|
---|
| 501 | // break on first passing ray
|
---|
| 502 | break;
|
---|
| 503 | }
|
---|
| 504 | }
|
---|
| 505 | float rr = left + (i+1)*(right-left)/(packetSize+1);
|
---|
| 506 | float rl = left + i*(right-left)/(packetSize+1);
|
---|
| 507 | left = rl;
|
---|
| 508 | right = rr;
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | if (i == packetSize) {
|
---|
| 512 | // cerr<<"Warning: hit the same box here should never happen!"<<endl;
|
---|
| 513 | // shift the ray even a bit more
|
---|
| 514 | //cout<<"W"<<i<<endl;
|
---|
| 515 | // return (RandomValue(1.0f, 1.5f)*radius)*line;
|
---|
| 516 | return right*line;
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | // cout<<i<<endl;
|
---|
| 520 | return shifts[i];
|
---|
| 521 |
|
---|
| 522 | #else
|
---|
| 523 | cerr << "warning: shiluette mutation not supported" << endl;
|
---|
| 524 | return Vector3(0, 0, 0);
|
---|
| 525 | #endif
|
---|
| 526 |
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 |
|
---|
| 530 | bool
|
---|
| 531 | ReverseGvs::GenerateSample(SimpleRay &sray)
|
---|
| 532 | {
|
---|
| 533 |
|
---|
| 534 | if (mRays.size() == 0) {
|
---|
| 535 | float rr[5];
|
---|
| 536 | // use direction based distribution
|
---|
| 537 | Vector3 origin, direction;
|
---|
| 538 |
|
---|
| 539 | for (int i=0; i < 5; i++)
|
---|
| 540 | rr[i] = RandomValue(0,1);
|
---|
| 541 |
|
---|
| 542 | mPreprocessor.mViewCellsManager->GetViewPoint(origin,
|
---|
| 543 | Vector3(rr[0], rr[1], rr[2]));
|
---|
| 544 |
|
---|
| 545 |
|
---|
| 546 | direction = UniformRandomVector(rr[3], rr[4]);
|
---|
| 547 |
|
---|
| 548 | const float pdf = 1.0f;
|
---|
| 549 | sray = SimpleRay(origin, direction, MUTATION_BASED_DISTRIBUTION, pdf);
|
---|
| 550 | sray.mGeneratorId = -1;
|
---|
| 551 |
|
---|
| 552 | return true;
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | int index;
|
---|
| 556 |
|
---|
| 557 | #if !MUTATION_USE_CDF
|
---|
| 558 | #if SORT_RAY_ENTRIES
|
---|
| 559 | index = mLastIndex - 1;
|
---|
| 560 | if (index < 0 || index >= mRays.size()-1) {
|
---|
| 561 | index = (int)mRays.size() - 1;
|
---|
| 562 | } else
|
---|
| 563 | if (
|
---|
| 564 | mRays[index].GetSamplingFactor() >= mRays[mLastIndex].GetSamplingFactor()) {
|
---|
| 565 | // make another round
|
---|
| 566 |
|
---|
| 567 | // cout<<"R2"<<endl;
|
---|
| 568 | // cout<<mLastIndex<<endl;
|
---|
| 569 | // cout<<index<<endl;
|
---|
| 570 | index = (int)mRays.size() - 1;
|
---|
| 571 | }
|
---|
| 572 | #else
|
---|
| 573 | // get tail of the buffer
|
---|
| 574 | index = (mLastIndex+1)%mRays.size();
|
---|
| 575 | if (mRays[index].GetSamplingFactor() >
|
---|
| 576 | mRays[mLastIndex].GetSamplingFactor()) {
|
---|
| 577 | // search back for index where this is valid
|
---|
| 578 | index = (mLastIndex - 1 + mRays.size())%mRays.size();
|
---|
| 579 | for (int i=0; i < mRays.size(); i++) {
|
---|
| 580 |
|
---|
| 581 | // if (mRays[index].mMutations > mRays[mLastIndex].mMutations)
|
---|
| 582 | // break;
|
---|
| 583 | if (mRays[index].GetSamplingFactor() >
|
---|
| 584 | mRays[mLastIndex].GetSamplingFactor() )
|
---|
| 585 | break;
|
---|
| 586 | index = (index - 1 + mRays.size())%mRays.size();
|
---|
| 587 | }
|
---|
| 588 | // go one step back
|
---|
| 589 | index = (index+1)%mRays.size();
|
---|
| 590 | }
|
---|
| 591 | #endif
|
---|
| 592 | #else
|
---|
| 593 | static HaltonSequence iHalton;
|
---|
| 594 | iHalton.GetNext(1, rr);
|
---|
| 595 | //rr[0] = RandomValue(0,1);
|
---|
| 596 | // use binary search to find index with this cdf
|
---|
| 597 | int l=0, r=(int)mRays.size()-1;
|
---|
| 598 | while(l<r) {
|
---|
| 599 | int i = (l+r)/2;
|
---|
| 600 | if (rr[0] < mRays[i].mCdf )
|
---|
| 601 | r = i;
|
---|
| 602 | else
|
---|
| 603 | l = i+1;
|
---|
| 604 | }
|
---|
| 605 | index = l;
|
---|
| 606 | // if (rr[0] >= mRays[r].mCdf)
|
---|
| 607 | // index = r;
|
---|
| 608 | // else
|
---|
| 609 | // index = l;
|
---|
| 610 |
|
---|
| 611 |
|
---|
| 612 | #endif
|
---|
| 613 | // cout<<index<<" "<<rr[0]<<" "<<mRays[index].mCdf<<" "<<mRays[(index+1)%mRays.size()].mCdf<<endl;
|
---|
| 614 |
|
---|
| 615 | mLastIndex = index;
|
---|
| 616 | // Debug<<index<<" "<<mRays[index].GetSamplingFactor()<<endl;
|
---|
| 617 |
|
---|
| 618 | if (mRays[index].HasReverseMutation()) {
|
---|
| 619 | //cout<<"R "<<mRays[index].mutatedOrigin<<" "<<mRays[index].mutatedTermination<<endl;
|
---|
| 620 | sray = SimpleRay(mRays[index].mutatedOrigin,
|
---|
| 621 | Normalize(mRays[index].mutatedTermination - mRays[index].mutatedOrigin),
|
---|
| 622 | MUTATION_BASED_DISTRIBUTION,
|
---|
| 623 | 1.0f);
|
---|
| 624 |
|
---|
| 625 |
|
---|
| 626 | sray.mGeneratorId = index;
|
---|
| 627 | mRays[index].ResetReverseMutation();
|
---|
| 628 | mRays[index].mMutations++;
|
---|
| 629 | mRays[index].mUnsuccessfulMutations++;
|
---|
| 630 |
|
---|
| 631 | return true;
|
---|
| 632 | }
|
---|
| 633 |
|
---|
| 634 | return GenerateMutation(index, sray);
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 |
|
---|
| 638 |
|
---|
| 639 |
|
---|
| 640 |
|
---|
| 641 | bool
|
---|
| 642 | ReverseGvs::GenerateMutationCandidate(const int index,
|
---|
| 643 | SimpleRay &sray,
|
---|
| 644 | Intersectable *object,
|
---|
| 645 | const AxisAlignedBox3 &box
|
---|
| 646 | )
|
---|
| 647 | {
|
---|
| 648 | float rr[4];
|
---|
| 649 |
|
---|
| 650 | VssRay *ray = mRays[index].mRay;
|
---|
| 651 |
|
---|
| 652 | // rr[0] = RandomValue(0.0f,0.99999f);
|
---|
| 653 | // rr[1] = RandomValue(0.0f,0.99999f);
|
---|
| 654 | // rr[2] = RandomValue(0.0f,0.99999f);
|
---|
| 655 | // rr[3] = RandomValue(0.0f,0.99999f);
|
---|
| 656 |
|
---|
| 657 | // mutate the origin
|
---|
| 658 | Vector3 d = ray->GetDir();
|
---|
| 659 |
|
---|
| 660 | float objectRadius = box.Radius();
|
---|
| 661 | // cout<<objectRadius<<endl;
|
---|
| 662 | if (objectRadius < Limits::Small)
|
---|
| 663 | return false;
|
---|
| 664 |
|
---|
| 665 | // Compute right handed coordinate system from direction
|
---|
| 666 | Vector3 U, V;
|
---|
| 667 | Vector3 nd = Normalize(d);
|
---|
| 668 | nd.RightHandedBase(U, V);
|
---|
| 669 |
|
---|
| 670 | Vector3 origin = ray->mOrigin;
|
---|
| 671 | Vector3 termination = ray->mTermination; //box.Center(); //ray->mTermination; //box.Center();
|
---|
| 672 |
|
---|
| 673 |
|
---|
| 674 | // use probabilitistic approach to decide for the type of mutation
|
---|
| 675 | float a = RandomValue(0.0f,1.0f);
|
---|
| 676 | bool bidirectional = true;
|
---|
| 677 |
|
---|
| 678 | if (mUseSilhouetteSamples && a < mSilhouetteProb) {
|
---|
| 679 |
|
---|
| 680 | termination += ComputeSilhouetteTerminationMutation(*ray,
|
---|
| 681 | origin,
|
---|
| 682 | box,
|
---|
| 683 | U, V,
|
---|
| 684 | 2.0f*objectRadius);
|
---|
| 685 | bidirectional = false;
|
---|
| 686 | } else {
|
---|
| 687 | mRays[index].mHalton.GetNext(4, rr);
|
---|
| 688 |
|
---|
| 689 | // fuzzy random mutation
|
---|
| 690 | origin += ComputeOriginMutation(*ray, U, V,
|
---|
| 691 | Vector2(rr[0], rr[1]),
|
---|
| 692 | mMutationRadiusOrigin*objectRadius);
|
---|
| 693 |
|
---|
| 694 | termination += ComputeTerminationMutation(*ray, U, V,
|
---|
| 695 | Vector2(rr[2], rr[3]),
|
---|
| 696 | mMutationRadiusTermination*objectRadius);
|
---|
| 697 | }
|
---|
| 698 |
|
---|
| 699 | Vector3 direction = termination - origin;
|
---|
| 700 |
|
---|
| 701 | if (Magnitude(direction) < Limits::Small)
|
---|
| 702 | return false;
|
---|
| 703 |
|
---|
| 704 | // shift the origin a little bit
|
---|
| 705 | origin += direction*0.5f;
|
---|
| 706 |
|
---|
| 707 | direction.Normalize();
|
---|
| 708 |
|
---|
| 709 | // $$ jb the pdf is yet not correct for all sampling methods!
|
---|
| 710 | const float pdf = 1.0f;
|
---|
| 711 |
|
---|
| 712 | sray = SimpleRay(origin, direction, MUTATION_BASED_DISTRIBUTION, pdf);
|
---|
| 713 | sray.mGeneratorId = index;
|
---|
| 714 | sray.SetBidirectional(bidirectional);
|
---|
| 715 |
|
---|
| 716 | return true;
|
---|
| 717 | }
|
---|
| 718 |
|
---|
| 719 | bool
|
---|
| 720 | ReverseGvs::GenerateMutation(const int index, SimpleRay &sray)
|
---|
| 721 | {
|
---|
| 722 | VssRay *ray = mRays[index].mRay;
|
---|
| 723 |
|
---|
| 724 | Intersectable *object = ray->mTerminationObject;
|
---|
| 725 |
|
---|
| 726 | AxisAlignedBox3 box = object->GetBox();
|
---|
| 727 |
|
---|
| 728 | if (GenerateMutationCandidate(index, sray, object, box)) {
|
---|
| 729 | mRays[index].mMutations++;
|
---|
| 730 | mRays[index].mUnsuccessfulMutations++;
|
---|
| 731 |
|
---|
| 732 | return true;
|
---|
| 733 | }
|
---|
| 734 | return false;
|
---|
| 735 | }
|
---|
| 736 |
|
---|
| 737 |
|
---|
| 738 |
|
---|
| 739 | ReverseGvs::ReverseGvs(Preprocessor &preprocessor
|
---|
| 740 | ) :
|
---|
| 741 | SamplingStrategy(preprocessor)
|
---|
| 742 | {
|
---|
| 743 | mType = MUTATION_BASED_DISTRIBUTION;
|
---|
| 744 | mBufferStart = 0;
|
---|
| 745 | mLastIndex = 0;
|
---|
| 746 |
|
---|
| 747 | Environment::GetSingleton()->GetIntValue("Mutation.bufferSize",
|
---|
| 748 | mMaxRays);
|
---|
| 749 |
|
---|
| 750 | mRays.reserve(mMaxRays);
|
---|
| 751 |
|
---|
| 752 | Environment::GetSingleton()->GetFloatValue("Mutation.radiusOrigin",
|
---|
| 753 | mMutationRadiusOrigin);
|
---|
| 754 |
|
---|
| 755 | Environment::GetSingleton()->GetFloatValue("Mutation.radiusTermination",
|
---|
| 756 | mMutationRadiusTermination);
|
---|
| 757 |
|
---|
| 758 | bool useEnhancedFeatures;
|
---|
| 759 |
|
---|
| 760 | #ifdef GTP_INTERNAL
|
---|
| 761 | int rayCaster;
|
---|
| 762 | Environment::GetSingleton()->GetIntValue("Preprocessor.rayCastMethod",
|
---|
| 763 | rayCaster);
|
---|
| 764 | useEnhancedFeatures = (rayCaster ==
|
---|
| 765 | RayCaster::INTEL_RAYCASTER);
|
---|
| 766 | #else
|
---|
| 767 | useEnhancedFeatures = false;
|
---|
| 768 | #endif
|
---|
| 769 |
|
---|
| 770 | if (useEnhancedFeatures) {
|
---|
| 771 | Environment::GetSingleton()->GetBoolValue("Mutation.useReverseSamples",
|
---|
| 772 | mUseReverseSamples);
|
---|
| 773 |
|
---|
| 774 | Environment::GetSingleton()->GetFloatValue("Mutation.reverseSamplesDistance",
|
---|
| 775 |
|
---|
| 776 | mReverseSamplesDistance);
|
---|
| 777 |
|
---|
| 778 | Environment::GetSingleton()->GetFloatValue("Mutation.silhouetteProb",
|
---|
| 779 | mSilhouetteProb);
|
---|
| 780 |
|
---|
| 781 | } else {
|
---|
| 782 | mUseReverseSamples = false;
|
---|
| 783 | mReverseSamplesDistance = 1e20f;
|
---|
| 784 | mSilhouetteProb = 0.0f;
|
---|
| 785 | }
|
---|
| 786 |
|
---|
| 787 | Environment::GetSingleton()->GetBoolValue("Mutation.useSilhouetteSamples",
|
---|
| 788 | mUseSilhouetteSamples);
|
---|
| 789 |
|
---|
| 790 | Environment::GetSingleton()->GetIntValue("Mutation.silhouetteSearchSteps",
|
---|
| 791 | mSilhouetteSearchSteps);
|
---|
| 792 |
|
---|
| 793 |
|
---|
| 794 | Environment::GetSingleton()->GetBoolValue("Mutation.usePassImportance",
|
---|
| 795 | mUsePassImportance);
|
---|
| 796 |
|
---|
| 797 |
|
---|
| 798 | Environment::GetSingleton()->GetBoolValue("Mutation.useUnsuccCountImportance",
|
---|
| 799 | mUseUnsuccCountImportance);
|
---|
| 800 |
|
---|
| 801 |
|
---|
| 802 |
|
---|
| 803 | }
|
---|
| 804 |
|
---|
| 805 |
|
---|
| 806 |
|
---|
| 807 | }
|
---|