[1520] | 1 | #include "InternalRayCaster.h"
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| 2 | #include "VssRay.h"
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| 3 | #include "KdTree.h"
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| 4 | #include "Preprocessor.h"
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| 5 |
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| 6 | #define DEBUG_RAYCAST 0
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| 7 |
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| 8 |
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| 9 | namespace GtpVisibilityPreprocessor {
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| 10 |
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| 11 |
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| 12 | InternalRayCaster::InternalRayCaster(const Preprocessor &preprocessor, KdTree *kdTree):
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| 13 | RayCaster(preprocessor), mKdTree(kdTree)
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| 14 | {
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| 15 | }
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| 16 |
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| 17 |
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| 18 | InternalRayCaster::~InternalRayCaster()
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| 19 | {
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| 20 | }
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| 21 |
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| 22 |
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[1528] | 23 | int InternalRayCaster::CastRay(const SimpleRay &simpleRay,
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[1824] | 24 | VssRayContainer &vssRays,
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| 25 | const AxisAlignedBox3 &box,
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| 26 | const bool castDoubleRay,
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| 27 | const bool pruneInvalidRays
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| 28 | )
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[1520] | 29 | {
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[1824] | 30 | if (simpleRay.mType == Ray::GLOBAL_RAY)
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| 31 | return CastGlobalRay(simpleRay, vssRays, box, pruneInvalidRays);
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| 32 |
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| 33 | //cout << "internal ray" << endl;
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[1584] | 34 | static Ray ray;
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[1583] | 35 | int hits = 0;
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| 36 | Intersection hitA(simpleRay.mOrigin), hitB(simpleRay.mOrigin);
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| 37 |
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[1584] | 38 | // inside test for bounding box
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| 39 | // enlarge box slightly so the view point fits for sure
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| 40 | // AxisAlignedBox3 sbox = box;
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| 41 | // sbox.Enlarge(Vector3(-Limits::Small));
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| 42 | // $$ JB moved here from Validate routine
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| 43 | if (!box.IsInside(simpleRay.mOrigin)) {
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| 44 | return 0;
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| 45 | }
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| 46 |
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[1583] | 47 | mPreprocessor.SetupRay(ray, simpleRay.mOrigin, simpleRay.mDirection);
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| 48 | ray.mFlags &= ~Ray::CULL_BACKFACES;
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| 49 |
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| 50 | if (mKdTree->CastRay(ray))
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[1520] | 51 | {
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[1583] | 52 | hitA.mObject = ray.intersections[0].mObject;
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| 53 | hitA.mPoint = ray.Extrap(ray.intersections[0].mT);
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| 54 | hitA.mNormal = ray.intersections[0].mNormal;
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| 55 | // cout << "hita: " << hitA.mPoint << " !obj: " << hitA.mObject << endl;
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[1520] | 56 | }
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[1583] | 57 |
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[1829] | 58 | mPreprocessor.SetupRay(ray, simpleRay.mOrigin, -simpleRay.mDirection);
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| 59 | ray.mFlags &= ~Ray::CULL_BACKFACES;
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[1583] | 60 |
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| 61 | if (castDoubleRay && mKdTree->CastRay(ray))
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[1824] | 62 | {
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| 63 | hitB.mObject = ray.intersections[0].mObject;
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| 64 | hitB.mPoint = ray.Extrap(ray.intersections[0].mT);
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| 65 | hitB.mNormal = ray.intersections[0].mNormal;
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| 66 | }
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[1583] | 67 |
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| 68 | return ProcessRay(
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[1824] | 69 | simpleRay,
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| 70 | hitA,
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| 71 | hitB,
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| 72 | vssRays,
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| 73 | box,
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| 74 | castDoubleRay,
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| 75 | pruneInvalidRays
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| 76 | );
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[1520] | 77 | }
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| 78 |
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| 79 |
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[1824] | 80 | int
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| 81 | InternalRayCaster::CastGlobalRay(const SimpleRay &simpleRay,
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| 82 | VssRayContainer &vssRays,
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| 83 | const AxisAlignedBox3 &box,
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| 84 | const bool pruneInvalidRays
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| 85 | )
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| 86 | {
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| 87 | static Ray ray;
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| 88 | int hits = 0;
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| 89 | mPreprocessor.SetupRay(ray, simpleRay.mOrigin, simpleRay.mDirection);
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| 90 |
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| 91 | float tmin, tmax;
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| 92 | if (!(box.ComputeMinMaxT(ray, &tmin, &tmax) && (tmin < tmax)))
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| 93 | return 0;
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| 94 |
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| 95 | // shift the ray origin to tmin
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| 96 | // Vector3 origin = ray.Extrap(tmin);
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| 97 | // mPreprocessor.SetupRay(ray, origin, simpleRay.mDirection);
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| 98 | ray.SetType(Ray::GLOBAL_RAY);
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| 99 | ray.mFlags &= ~Ray::CULL_BACKFACES;
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| 100 |
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| 101 |
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| 102 | VssRay *vssRay;
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| 103 |
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| 104 | if (mKdTree->CastRay(ray)) {
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| 105 | // sort intersections
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| 106 | ray.SortIntersections();
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| 107 | //cout<<"I="<<ray.intersections.size()<<endl;
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| 108 |
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| 109 |
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| 110 | Ray::Intersection &hit = ray.intersections[0];
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| 111 |
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| 112 | if (DotProd(hit.mNormal, ray.GetDir()) < 0) {
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| 113 | // insert intial segment
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| 114 | vssRay = new VssRay(
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| 115 | ray.Extrap(tmin),
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| 116 | ray.Extrap(hit.mT),
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| 117 | NULL,
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| 118 | hit.mObject,
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| 119 | mPreprocessor.mPass,
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| 120 | simpleRay.mPdf
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| 121 | );
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| 122 | vssRay->mFlags |= VssRay::Valid;
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| 123 | vssRays.push_back(vssRay);
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| 124 | ++hits;
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| 125 | }
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| 126 |
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| 127 | hit = ray.intersections[ray.intersections.size()-1];
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| 128 | if (DotProd(hit.mNormal, ray.GetDir()) > 0) {
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| 129 |
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| 130 | // insert termination segment
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| 131 | vssRay = new VssRay(
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| 132 | ray.Extrap(tmax),
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| 133 | ray.Extrap(hit.mT),
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| 134 | NULL,
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| 135 | hit.mObject,
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| 136 | mPreprocessor.mPass,
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| 137 | simpleRay.mPdf
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| 138 | );
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| 139 | vssRay->mFlags |= VssRay::Valid;
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| 140 | vssRays.push_back(vssRay);
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| 141 | ++hits;
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| 142 | }
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| 143 |
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| 144 | // insert the rest of segments
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| 145 | for (int i=0; i < ray.intersections.size() - 1; i++) {
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| 146 | Ray::Intersection &hitA = ray.intersections[i];
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| 147 | Ray::Intersection &hitB = ray.intersections[i + 1];
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| 148 | if (DotProd(hitA.mNormal, ray.GetDir()) > 0 &&
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| 149 | DotProd(hitB.mNormal, ray.GetDir()) < 0
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| 150 | ) {
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| 151 |
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| 152 | vssRay = new VssRay(
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| 153 | ray.Extrap(hitA.mT),
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| 154 | ray.Extrap(hitB.mT),
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| 155 | hitA.mObject,
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| 156 | hitB.mObject,
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| 157 | mPreprocessor.mPass,
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| 158 | simpleRay.mPdf
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| 159 | );
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| 160 | vssRay->mFlags |= VssRay::Valid;
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| 161 | vssRays.push_back(vssRay);
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| 162 | ++hits;
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| 163 |
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| 164 | vssRay = new VssRay(
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| 165 | ray.Extrap(hitB.mT),
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| 166 | ray.Extrap(hitA.mT),
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| 167 | hitB.mObject,
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| 168 | hitA.mObject,
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| 169 | mPreprocessor.mPass,
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| 170 | simpleRay.mPdf
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| 171 | );
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| 172 |
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| 173 | vssRay->mFlags |= VssRay::Valid;
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| 174 | vssRays.push_back(vssRay);
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| 175 | ++hits;
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| 176 | }
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| 177 | }
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| 178 | }
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| 179 |
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| 180 | return hits;
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| 181 | }
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| 182 |
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[1521] | 183 | void InternalRayCaster::CastRays16(const int index,
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[1828] | 184 | SimpleRayContainer &rays,
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| 185 | VssRayContainer &vssRays,
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| 186 | const AxisAlignedBox3 &sbox,
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| 187 | const bool castDoubleRays,
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| 188 | const bool pruneInvalidRays)
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[1520] | 189 | {
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| 190 | const int num = 16;
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| 191 |
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| 192 | #if DEBUG_RAYCAST
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[1828] | 193 | Debug << "C16 " << flush;
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[1520] | 194 | #endif
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| 195 |
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| 196 | // no acceleration for ray bundles implemented right now
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[1828] | 197 | for (int i = index; i < index + num; i++)
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[1520] | 198 | {
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[1528] | 199 | CastRay(rays[i], vssRays, sbox, castDoubleRays, pruneInvalidRays);
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[1520] | 200 | }
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| 201 |
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| 202 | #if DEBUG_RAYCAST
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| 203 | Debug<<"C16F\n"<<flush;
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| 204 | #endif
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| 205 | }
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| 206 |
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[1583] | 207 | }
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