| 1 | /*! |
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| 2 | * @file bv_tree.h |
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| 3 | * Definition of a bounding volume tree |
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| 4 | |
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| 5 | */ |
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| 6 | |
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| 7 | #ifndef _OBB_TREE_NODE_H |
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| 8 | #define _OBB_TREE_NODE_H |
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| 9 | |
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| 10 | #include "bv_tree_node.h" |
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| 11 | |
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| 12 | |
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| 13 | |
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| 14 | // FORWARD DECLARATION |
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| 15 | class BoundingVolume; |
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| 16 | class OBB; |
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| 17 | class OBBTree; |
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| 18 | class Plane; |
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| 19 | class PNode; |
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| 20 | //struct sVec3D; |
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| 21 | |
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| 22 | //! A class that represents a bounding volume tree |
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| 23 | class OBBTreeNode : public BVTreeNode { |
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| 24 | |
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| 25 | |
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| 26 | public: |
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| 27 | OBBTreeNode(const OBBTree& tree, unsigned int depth); |
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| 28 | virtual ~OBBTreeNode(); |
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| 29 | |
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| 30 | /* this function returns the bounding volume of this tree node @return: returns the BV */ |
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| 31 | virtual inline const BoundingVolume* getBV() const { return (BoundingVolume*)this->bvElement; } |
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| 32 | |
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| 33 | |
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| 34 | virtual void spawnBVTree(const int depth, const sVec3D *verticesList, unsigned int length); |
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| 35 | virtual void spawnBVTree(const int depth, const modelInfo& modelInf, |
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| 36 | const int* triangleIndexes, unsigned int length); |
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| 37 | |
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| 38 | virtual void collideWith(BVTreeNode* treeNode, WorldEntity* nodeA, WorldEntity* nodeB); |
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| 39 | virtual void drawBV(int depth, int drawMode, const Vector& color = Vector(1,0,0), bool top = true) const; |
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| 40 | void debug() const; |
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| 41 | |
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| 42 | |
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| 43 | private: |
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| 44 | void calculateBoxEigenvectors(OBB& box, const sVec3D* verticesList, unsigned int length); |
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| 45 | void calculateBoxAxis(OBB& box, const sVec3D* verticesList, unsigned int length); |
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| 46 | |
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| 47 | void calculateBoxCovariance(OBB& box, const modelInfo& modelInf, const int* triangleIndexes, unsigned int length); |
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| 48 | void calculateBoxEigenvectors(OBB& box, const modelInfo& modelInf, const int* triangleIndexes, unsigned int length); |
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| 49 | void calculateBoxAxis(OBB& box, const modelInfo& modelInf, const int* triangleIndexes, unsigned int length); |
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| 50 | |
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| 51 | void forkBox(OBB& box); |
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| 52 | |
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| 53 | bool overlapTest(OBB* boxA, OBB* boxB, WorldEntity* nodeA, WorldEntity* nodeB); |
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| 54 | |
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| 55 | |
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| 56 | protected: |
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| 57 | OBB* bvElement; //!< the obb element |
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| 58 | OBBTreeNode* nodeLeft; //!< ref to the left tree node |
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| 59 | OBBTreeNode* nodeRight; //!< ref to the right tree node |
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| 60 | |
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| 61 | |
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| 62 | private: |
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| 63 | unsigned int treeIndex; //!< Index number of the BV in the tree |
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| 64 | int depth; //!< the depth of the node in the tree |
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| 65 | const OBBTree* obbTree; //!< reference to the obb tree |
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| 66 | |
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| 67 | const sVec3D* vertices; //!< pointer to the vertices data |
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| 68 | int numOfVertices; //!< number of vertices in vertices data |
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| 69 | Plane separationPlane; //!< the separation plane of the obb |
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| 70 | const sVec3D* sepPlaneCenter; //!< only needed to draw plane |
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| 71 | int longestAxisIndex; //!< only needed to draw plane |
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| 72 | |
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| 73 | /* tmp saving place for obb variables */ |
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| 74 | sVec3D* tmpVert1; //!< pointer to the vert data of obbox1 |
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| 75 | sVec3D* tmpVert2; //!< pointer to the vert data of obbox1 |
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| 76 | int tmpLen1; //!< len vert data obbox1 |
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| 77 | int tmpLen2; //!< len vert data obbox2 |
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| 78 | |
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| 79 | static float** coMat; |
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| 80 | static float** eigvMat; |
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| 81 | static float* eigvlMat; |
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| 82 | static int* rotCount; |
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| 83 | |
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| 84 | }; |
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| 85 | |
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| 86 | #endif /* _OBB_TREE_NODE_H */ |
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