BulletMesh.h

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/* Copyright © 2009, 2010 James Legg.
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
*/
#ifndef LIBTRACK_BULLET_MESH_H
#define LIBTRACK_BULLET_MESH_H

#include <string>
#include <vector>
#include <utility>

#include <btBulletDynamicsCommon.h>
#include <btBulletCollisionCommon.h>

#include "DrawableMesh.h"

namespace Track
{

class BulletMesh
    :   public DrawableMesh
{   
    // no public copy constructor, since we could delete Bullet objects in use. 
    BulletMesh(const BulletMesh & source);
    // no assignment operator, since we could delete Bullet objects in use.
    BulletMesh & operator=(const BulletMesh & source);
public:
    static const unsigned int genererator_convex_hull_bit = 2;
    static const unsigned int genererator_triangle_mesh_bit = 4;
    
    BulletMesh(std::string filename,
                 unsigned int generators = genererator_triangle_mesh_bit,
                 DrawableMesh::RenderMode render_mode = DrawableMesh::RM_SOLID);
    
    BulletMesh(std::istream & source,
                 unsigned int generators = genererator_triangle_mesh_bit,
                 DrawableMesh::RenderMode render_mode = DrawableMesh::RM_SOLID);
    
    typedef std::pair<std::string, unsigned int> ConstructionInformation;
    
    BulletMesh(ConstructionInformation construction_information);
    
    virtual ~BulletMesh();
    
    btConvexHullShape * get_convex_hull_shape();
    btBvhTriangleMeshShape * get_triangle_shape();
private:
    void create(unsigned int generators = genererator_triangle_mesh_bit);
    
    // pointers to the shapes created.
    // 0 if the apprpriate bit was not set when creating the mesh.
    btConvexHullShape * simplified_convex_shape;
    btBvhTriangleMeshShape * triangle_mesh_shape;
    btTriangleMesh * triangle_mesh;
};

}

#endif /*LIBTRACK_BULLET_MESH_H*/

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