triangle_mesh.h

/*************************************************************************/
/*  triangle_mesh.h                                                      */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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#ifndef TRIANGLE_MESH_H
#define TRIANGLE_MESH_H

#include "reference.h"
#include "face3.h"
class TriangleMesh : public Reference {

    OBJ_TYPE( TriangleMesh, Reference);

    struct Triangle {

        Vector3 normal;
        int indices[3];
    };

    DVector<Triangle> triangles;
    DVector<Vector3> vertices;

    struct BVH {

        AABB aabb;
        Vector3 center; //used for sorting
        int left;
        int right;

        int face_index;
    };

    struct BVHCmpX {

        bool operator()(const BVH* p_left, const BVH* p_right) const {

            return p_left->center.x < p_right->center.x;
        }
    };

    struct BVHCmpY {

        bool operator()(const BVH* p_left, const BVH* p_right) const {

            return p_left->center.y < p_right->center.y;
        }
    };
    struct BVHCmpZ {

        bool operator()(const BVH* p_left, const BVH* p_right) const {

            return p_left->center.z < p_right->center.z;
        }
    };

    int _create_bvh(BVH*p_bvh,BVH** p_bb,int p_from,int p_size,int p_depth,int&max_depth,int&max_alloc);

    DVector<BVH> bvh;
    int max_depth;
    bool valid;

public:

    bool is_valid() const;
    bool intersect_segment(const Vector3& p_begin,const Vector3& p_end,Vector3 &r_point, Vector3 &r_normal) const;
    bool intersect_ray(const Vector3& p_begin,const Vector3& p_dir,Vector3 &r_point, Vector3 &r_normal) const;
    Vector3 get_area_normal(const AABB& p_aabb) const;
    DVector<Face3> get_faces() const;


    void create(const DVector<Vector3>& p_faces);
    TriangleMesh();
};

#endif // TRIANGLE_MESH_H