[162] | 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 | |
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| 13 | class MeshInstance; |
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| 14 | |
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| 15 | /// default vertex container for Mesh |
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| 16 | typedef std::vector<Vector3> VertexContainer; |
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| 17 | |
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| 18 | /// vertex index container |
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| 19 | typedef std::vector<int> VertexIndexContainer; |
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| 20 | |
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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):mVertexIndices(4) { |
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| 34 | mVertexIndices[0] = a; |
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| 35 | mVertexIndices[1] = b; |
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| 36 | mVertexIndices[2] = c; |
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| 37 | mVertexIndices[3] = d; |
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| 38 | } |
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| 39 | |
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| 40 | Face(const VertexIndexContainer &vertices):mVertexIndices(vertices) {} |
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| 41 | |
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| 42 | /// list of vertex pointers |
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| 43 | VertexIndexContainer mVertexIndices; |
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| 44 | }; |
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| 45 | |
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| 46 | /// default patch container for Mesh |
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| 47 | typedef std::vector<Face *> FaceContainer; |
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| 48 | |
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| 49 | /** Mesh containing polygonal patches */ |
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| 50 | class Mesh { |
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| 51 | |
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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) {} |
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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):mVertices(), |
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| 61 | mFaces(), |
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| 62 | mMaterial(NULL) |
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| 63 | { |
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| 64 | mVertices.reserve(vertices); |
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| 65 | mFaces.reserve(faces); |
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| 66 | } |
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| 67 | |
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| 68 | ~Mesh() { |
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| 69 | for (int i=0; i < mFaces.size(); i++) |
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| 70 | delete mFaces[i]; |
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| 71 | } |
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| 72 | |
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| 73 | void AddFace(Face *face) |
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| 74 | { |
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| 75 | mFaces.push_back(face); |
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| 76 | } |
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| 77 | |
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| 78 | void Preprocess(); |
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| 79 | |
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| 80 | /** Axis aligned bounding box of the mesh */ |
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| 81 | AxisAlignedBox3 mBoundingBox; |
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| 82 | |
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| 83 | /** Vertices forming the mesh */ |
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| 84 | VertexContainer mVertices; |
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| 85 | |
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| 86 | /** Patches forming the mesh */ |
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| 87 | FaceContainer mFaces; |
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| 88 | |
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| 89 | /** Global mesh material */ |
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| 90 | Material *mMaterial; |
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| 91 | |
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| 92 | /** true if the mesh is a convex mesh */ |
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| 93 | bool mIsConvex; |
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| 94 | |
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| 95 | int |
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| 96 | CastRay( |
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| 97 | Ray &ray, |
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| 98 | MeshInstance *instance |
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| 99 | ); |
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| 100 | |
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| 101 | |
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| 102 | int |
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| 103 | RayFaceIntersection(const int faceIndex, |
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| 104 | const Ray &ray, |
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| 105 | float &t, |
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| 106 | const float nearestT |
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| 107 | ); |
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| 108 | |
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| 109 | Plane3 GetFacePlane(const int faceIndex); |
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| 110 | |
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| 111 | }; |
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| 112 | |
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| 113 | class MeshInstance : public Intersectable { |
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| 114 | protected: |
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| 115 | static int mailID; |
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| 116 | int mailbox; |
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| 117 | float mVisibility; |
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| 118 | Mesh *mMesh; |
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| 119 | |
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| 120 | public: |
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| 121 | MeshInstance(Mesh *mesh):mMesh(mesh), mVisibility(1.0f), mailbox(0) |
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| 122 | { |
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| 123 | } |
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| 124 | |
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| 125 | void Mail() { mailbox = mailID; } |
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| 126 | static void NewMail() { mailID++; } |
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| 127 | bool Mailed() const { return mailbox == mailID; } |
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| 128 | |
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| 129 | |
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| 130 | Mesh *GetMesh() { return mMesh; } |
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| 131 | |
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| 132 | virtual AxisAlignedBox3 GetBox() { |
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| 133 | return mMesh->mBoundingBox; |
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| 134 | } |
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| 135 | |
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| 136 | virtual int |
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| 137 | CastRay( |
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| 138 | Ray &ray |
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| 139 | ); |
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| 140 | |
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| 141 | |
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| 142 | }; |
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| 143 | |
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| 144 | |
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| 145 | class MeshTransformedInstance : public MeshInstance |
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| 146 | { |
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| 147 | public: |
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| 148 | MeshTransformedInstance(Mesh *mesh):MeshInstance(mesh) |
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| 149 | { |
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| 150 | mWorldTransform = IdentityMatrix(); |
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| 151 | } |
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| 152 | |
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| 153 | virtual AxisAlignedBox3 GetBox() { |
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| 154 | return Transform(mMesh->mBoundingBox, |
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| 155 | mWorldTransform); |
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| 156 | } |
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| 157 | |
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| 158 | virtual int |
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| 159 | CastRay( |
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| 160 | Ray &ray |
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| 161 | ); |
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| 162 | |
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| 163 | private: |
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| 164 | Matrix4x4 mWorldTransform; |
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| 165 | |
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| 166 | }; |
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| 167 | |
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| 168 | |
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| 169 | |
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| 170 | #endif |
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