[191] | 1 | #ifndef __MUTUAL_VISIBILITY_H
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| 2 | #define __MUTUAL_VISIBILITY_H
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| 3 |
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| 4 | #include "Vector3.h"
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| 5 | #include "Ray.h"
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| 6 |
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| 7 | class Intersectable;
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| 8 | class AxisAlignedBox3;
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[245] | 9 | class SceneGraph;
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[191] | 10 |
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| 11 |
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[223] | 12 | struct RaySample {
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| 13 | /// true if the sample really intersects both boxes
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| 14 | float mMinT;
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| 15 | float mMaxT;
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[245] | 16 |
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| 17 | RaySample():mMinT(-1.0f), mMaxT(-1.0f) {}
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[223] | 18 | /// intersections of the sample with the scene
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| 19 | vector<Ray::Intersection> mIntersections;
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[245] | 20 | void SetInvalid() {
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| 21 | mMinT = 0.0f;
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| 22 | mMaxT = -1.0f;
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| 23 | }
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| 24 | bool IsValid() const { return mMaxT > 0.0f; }
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| 25 | bool IsProcessed() const { return mMinT != mMaxT; }
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[223] | 26 | };
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[191] | 27 |
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[209] | 28 | struct RayShaft {
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[191] | 29 | public:
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| 30 | /// evaluted sampling error
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| 31 | float mError;
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| 32 | /// depth in recursion
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| 33 | int mDepth;
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| 34 | /// The source triangle
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[209] | 35 | Rectangle3 mSource;
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[191] | 36 | /// The target triangle
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[209] | 37 | Rectangle3 mTarget;
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[191] | 38 |
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[223] | 39 | RaySample mSamples[4];
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[191] | 40 |
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| 41 | void ComputeError();
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| 42 |
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[245] | 43 | RayShaft() {}
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[191] | 44 |
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[209] | 45 | RayShaft (
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| 46 | const Rectangle3 &source,
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| 47 | const Rectangle3 &target)
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[191] | 48 | {
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| 49 | Init(source, target);
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| 50 | }
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[245] | 51 |
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| 52 | bool IsValid() const { return
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| 53 | mSamples[0].IsValid() &&
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| 54 | mSamples[1].IsValid() &&
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| 55 | mSamples[2].IsValid() &&
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| 56 | mSamples[3].IsValid();
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| 57 | }
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| 58 |
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[191] | 59 | // initial triangle sample
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| 60 | void Init(
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[209] | 61 | const Rectangle3 &source,
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| 62 | const Rectangle3 &target);
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[191] | 63 |
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| 64 | Vector3
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| 65 | GetIntersectionPoint(const int rayIndex,
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| 66 | const int depth) const;
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[209] | 67 |
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[191] | 68 | void GetRay(const int rayIndex,
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| 69 | Vector3 &origin,
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| 70 | Vector3 &direction) const;
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[245] | 71 |
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| 72 | void
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| 73 | GetRaySegment(const int i, Ray &ray) const;
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| 74 |
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[191] | 75 | };
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| 76 |
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| 77 | enum { VISIBLE, INVISIBLE };
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| 78 |
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| 79 |
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| 80 | class MutualVisibilitySampler {
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| 81 | public:
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[245] | 82 | SceneGraph *mSceneGraph;
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[191] | 83 | KdTree *mKdTree;
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| 84 | AxisAlignedBox3 mSource;
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| 85 | AxisAlignedBox3 mTarget;
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| 86 | float mSolidAngleThreshold;
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[245] | 87 | bool mUseBoxes;
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[191] | 88 |
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[501] | 89 | MutualVisibilitySampler(
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| 90 | SceneGraph *sceneGraph,
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| 91 | KdTree *kdTree,
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| 92 | const AxisAlignedBox3 &source,
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| 93 | const AxisAlignedBox3 &target,
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| 94 | const float solidAngleThreshold
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| 95 | );
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[191] | 96 | int
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| 97 | ComputeVisibility();
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| 98 |
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| 99 | void
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[501] | 100 | ConstructInitialSamples(const AxisAlignedBox3 &source,
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| 101 | const AxisAlignedBox3 &target,
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| 102 | vector<RayShaft *> &samples
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| 103 | );
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[359] | 104 |
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[191] | 105 | void
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[245] | 106 | ConstructInitialSamples2(
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[501] | 107 | const AxisAlignedBox3 &source,
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| 108 | const AxisAlignedBox3 &target,
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| 109 | vector<RayShaft *> &samples
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| 110 | );
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[359] | 111 |
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[245] | 112 | void
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| 113 | ConstructInitialSamples3(
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[501] | 114 | const AxisAlignedBox3 &source,
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| 115 | const AxisAlignedBox3 &target,
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| 116 | vector<RayShaft *> &samples
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| 117 | );
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[359] | 118 |
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[245] | 119 | void
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[191] | 120 | AddInitialSamples(
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[501] | 121 | const Rectangle3 &sourceRect,
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| 122 | const Rectangle3 &targetRect,
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| 123 | vector<RayShaft *> &samples
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| 124 | );
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[359] | 125 |
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[245] | 126 | void
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| 127 | AddInitialSamples2(
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[501] | 128 | const Rectangle3 &sourceRect,
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| 129 | const Rectangle3 &targetRect,
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| 130 | vector<RayShaft *> &samples
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| 131 | );
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[359] | 132 |
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[191] | 133 | // the split sample method contains a methodology to create new samples
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| 134 | // or terminate the sampling
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| 135 | bool
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| 136 | SplitSample(
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[501] | 137 | const RayShaft &source,
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| 138 | RayShaft &sample1,
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| 139 | RayShaft &sample2
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| 140 | );
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[191] | 141 | void
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| 142 | PerformSplit(
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[501] | 143 | const RayShaft &sample,
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| 144 | const bool splitSource,
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| 145 | const int axis,
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| 146 | RayShaft &sample1,
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| 147 | RayShaft &sample2
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| 148 | );
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[191] | 149 |
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[359] | 150 |
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[191] | 151 | bool
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| 152 | SampleTerminationCriteriaMet(
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[501] | 153 | const RayShaft &sample);
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[191] | 154 |
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| 155 | float
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[209] | 156 | GetSpatialAngle(const RayShaft &sample,
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[501] | 157 | const Vector3 &point
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| 158 | );
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[359] | 159 |
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[223] | 160 | int
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| 161 | CastRays(RayShaft &shaft);
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[359] | 162 |
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[191] | 163 | void
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[209] | 164 | ComputeError(RayShaft &sample);
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[223] | 165 |
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[209] | 166 | void
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[245] | 167 | ExportShafts(vector<RayShaft *> &samples, const bool singleFile);
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[191] | 168 |
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[209] | 169 |
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[191] | 170 | };
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| 171 |
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| 172 | int
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[245] | 173 | ComputeBoxVisibility(SceneGraph *sceneGraph,
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| 174 | KdTree *kdTree,
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[359] | 175 | const AxisAlignedBox3 &source,
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| 176 | const AxisAlignedBox3 &target,
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| 177 | const float solidAngleThreshold);
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[191] | 178 |
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| 179 |
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| 180 |
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| 181 |
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| 182 |
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| 183 |
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| 184 | #endif
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