[372] | 1 | #ifndef _Mesh_H__
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| 2 | #define _Mesh_H__
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| 3 |
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| 4 | #include <vector>
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| 5 | using namespace std;
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| 6 | #include "Intersectable.h"
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| 7 | #include "Plane3.h"
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| 8 | #include "Matrix4x4.h"
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| 9 | #include "AxisAlignedBox3.h"
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| 10 | #include "Material.h"
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| 11 |
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| 12 | struct Triangle3;
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| 13 | class MeshInstance;
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| 14 | class MeshKdTree;
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| 15 |
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| 16 | /// default vertex container for Mesh
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| 17 | typedef std::vector<Vector3> VertexContainer;
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| 18 |
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| 19 | /// vertex index container
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| 20 | typedef std::vector<int> VertexIndexContainer;
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| 21 |
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| 22 |
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| 23 | /** Patch used as an element of the mesh */
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| 24 | class Face {
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| 25 | public:
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| 26 | Face(): mVertexIndices() {}
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| 27 | Face(const int a, const int b, const int c):mVertexIndices(3) {
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| 28 | mVertexIndices[0] = a;
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| 29 | mVertexIndices[1] = b;
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| 30 | mVertexIndices[2] = c;
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| 31 | }
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| 32 |
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| 33 | Face(const int a, const int b, const int c, const int d):
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| 34 | mVertexIndices(4) {
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| 35 | mVertexIndices[0] = a;
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| 36 | mVertexIndices[1] = b;
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| 37 | mVertexIndices[2] = c;
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| 38 | mVertexIndices[3] = d;
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| 39 | }
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| 40 |
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| 41 | Face(const VertexIndexContainer &vertices):mVertexIndices(vertices) {}
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| 42 |
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| 43 | /// list of vertex pointers
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| 44 | VertexIndexContainer mVertexIndices;
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| 45 | };
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| 46 |
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| 47 | /// default patch container for Mesh
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| 48 | typedef std::vector<Face *> FaceContainer;
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| 49 |
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| 50 | /** Mesh containing polygonal patches */
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| 51 | class Mesh {
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| 52 |
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| 53 | public:
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| 54 |
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| 55 | /// Default constructor
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| 56 | Mesh():mVertices(), mFaces(), mMaterial(NULL), mKdTree(NULL) {}
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| 57 |
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| 58 | /// Constructor with container preallocation
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| 59 | Mesh(const int vertices,
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| 60 | const int faces):
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| 61 | mFaces(),
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| 62 | mMaterial(NULL),
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| 63 | mKdTree(NULL),
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| 64 | mVertices(),
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| 65 | mIsConvex(false),
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| 66 | mIsWatertight(false)
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| 67 | {
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| 68 | mVertices.reserve(vertices);
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| 69 | mFaces.reserve(faces);
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| 70 | }
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| 71 |
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| 72 | ~Mesh() {
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| 73 | for (int i=0; i < mFaces.size(); i++)
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| 74 | delete mFaces[i];
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| 75 | }
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| 76 |
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| 77 | void AddTriangle(const Triangle3 &triangle);
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| 78 | void AddRectangle(const Rectangle3 &triangle);
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| 79 |
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[693] | 80 | void Cleanup();
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| 81 |
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| 82 | bool ValidateFace(const int face);
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[372] | 83 |
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| 84 | void AddFace(Face *face)
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| 85 | {
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| 86 | mFaces.push_back(face);
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| 87 | }
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| 88 |
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| 89 | void Preprocess();
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| 90 |
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| 91 | /** Axis aligned bounding box of the mesh in local mesh coordinates */
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| 92 | AxisAlignedBox3 mBox;
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| 93 |
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| 94 | /** Vertices forming the mesh */
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| 95 | VertexContainer mVertices;
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| 96 |
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| 97 | /** Patches forming the mesh */
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| 98 | FaceContainer mFaces;
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| 99 |
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| 100 | /** Global mesh material */
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| 101 | Material *mMaterial;
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| 102 |
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| 103 | /** true if the mesh is a convex mesh */
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| 104 | bool mIsConvex;
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| 105 |
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| 106 | /** true if the mesh is a convex mesh */
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| 107 | bool mIsWatertight;
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| 108 |
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| 109 | MeshKdTree *mKdTree;
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| 110 |
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| 111 | int
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| 112 | CastRay(
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| 113 | Ray &ray,
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| 114 | MeshInstance *instance
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| 115 | );
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| 116 |
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| 117 | int
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| 118 | CastRayToSelectedFaces(
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| 119 | Ray &ray,
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| 120 | const vector<int> &faces,
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| 121 | Intersectable *instance
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| 122 | );
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| 123 |
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| 124 | int
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| 125 | CastRayToFace(
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| 126 | const int faceIndex,
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| 127 | Ray &ray,
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| 128 | float &nearestT,
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| 129 | int &nearestFace,
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| 130 | Intersectable *instance
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| 131 | );
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| 132 |
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| 133 |
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| 134 | int
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| 135 | RayFaceIntersection(const int faceIndex,
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| 136 | const Ray &ray,
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| 137 | float &t,
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| 138 | const float nearestT
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| 139 | );
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| 140 |
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| 141 | Plane3 GetFacePlane(const int faceIndex);
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| 142 |
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| 143 | AxisAlignedBox3 GetFaceBox(const int faceIndex);
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| 144 |
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| 145 | int GetRandomSurfacePoint(Vector3 &point, Vector3 &normal);
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| 146 |
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[492] | 147 | int
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| 148 | GetRandomVisibleSurfacePoint(Vector3 &point,
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| 149 | Vector3 &normal,
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| 150 | const Vector3 &viewpoint,
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| 151 | const int maxTries
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| 152 | );
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| 153 |
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| 154 | virtual ostream &Describe(ostream &s) {
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| 155 | return s<<"Mesh #vertices="<<(int)mVertices.size()<<" #faces="<<(int)mFaces.size();
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| 156 | }
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| 157 |
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[372] | 158 |
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| 159 | };
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| 160 |
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[492] | 161 |
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[372] | 162 | class MeshInstance : public Intersectable {
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| 163 | protected:
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| 164 | Mesh *mMesh;
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| 165 |
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| 166 | public:
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| 167 | MeshInstance(Mesh *mesh):Intersectable(), mMesh(mesh)
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| 168 | {
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| 169 | }
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| 170 |
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| 171 | int GetRandomSurfacePoint(Vector3 &point, Vector3 &normal);
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| 172 |
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| 173 | int
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| 174 | GetRandomVisibleSurfacePoint(Vector3 &point,
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| 175 | Vector3 &normal,
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| 176 | const Vector3 &viewpoint,
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| 177 | const int maxTries
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| 178 | );
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| 179 |
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| 180 |
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| 181 | Mesh *GetMesh() { return mMesh; }
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| 182 |
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| 183 | virtual AxisAlignedBox3 GetBox() {
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| 184 | return mMesh->mBox;
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| 185 | }
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| 186 |
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| 187 | virtual int
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| 188 | CastRay(
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| 189 | Ray &ray
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| 190 | );
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| 191 |
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| 192 | virtual bool IsConvex() { return mMesh->mIsConvex; }
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| 193 | virtual bool IsWatertight() { return mMesh->mIsWatertight; }
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| 194 | virtual float IntersectionComplexity() { return (float)mMesh->mFaces.size(); }
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| 195 |
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[406] | 196 | virtual int NumberOfFaces() const { return (int)mMesh->mFaces.size(); }
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[387] | 197 |
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[372] | 198 | virtual int Type() const { return MESH_INSTANCE; }
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| 199 |
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| 200 | virtual int
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| 201 | CastRay(
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| 202 | Ray &ray,
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| 203 | const vector<int> &faces
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| 204 | );
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| 205 |
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| 206 |
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| 207 | virtual ostream &Describe(ostream &s) {
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| 208 | s<<"MeshInstance Id="<<GetId();
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| 209 | return mMesh->Describe(s);
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| 210 | }
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| 211 |
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| 212 | };
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| 213 |
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| 214 |
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| 215 | class TransformedMeshInstance : public MeshInstance
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| 216 | {
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| 217 | public:
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| 218 | TransformedMeshInstance(Mesh *mesh):MeshInstance(mesh)
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| 219 | {
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| 220 | mWorldTransform = IdentityMatrix();
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| 221 | }
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| 222 |
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| 223 | virtual AxisAlignedBox3 GetBox() {
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| 224 | return Transform(mMesh->mBox,
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| 225 | mWorldTransform);
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| 226 | }
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| 227 |
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| 228 | virtual int
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| 229 | CastRay(
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| 230 | Ray &ray
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| 231 | );
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| 232 |
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| 233 | virtual int Type() const { return TRANSFORMED_MESH_INSTANCE; }
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| 234 |
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| 235 | int GetRandomSurfacePoint(Vector3 &point, Vector3 &normal);
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| 236 |
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| 237 | private:
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| 238 | Matrix4x4 mWorldTransform;
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| 239 |
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| 240 | };
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| 241 |
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| 242 |
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| 243 |
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| 244 | #endif
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