source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Geometry.h @ 3293

#ifndef __GEOMETRY_H
#define __GEOMETRY_H

#include "common.h"
#include "AxisAlignedBox3.h"
#include "Triangle3.h"


namespace CHCDemoEngine 
{

class RenderState;


/** Represents drawable geometry consisting of triangles.
*/
class Geometry
{
        friend class ResourceManager;

public:
        /** Constructs a geometry from the given data. The vertices are 
                interpreted as triangles. If delData is true, the 
                vertex / normal / texture is deleted when after it was 
                transferred into a vbo
        */
        Geometry(Vector3 *vertices, 
                     Vector3 *normals, 
                         Texcoord2 *texcoords, 
                         int numVertices, 
                         bool deleteData,
                         Vector3 *tangents);
        /** Detructor destroying the opengl resources.
        */
        ~Geometry();
        /** Render the geometry
        */
        void Render(RenderState *state);
        /** Return bounding box.
        */
        const AxisAlignedBox3& GetBoundingBox() const;
        /** Returns the number of triangles in this geometry.
        */
        inline int GetNumTriangles() const { return mNumVertices / 3; }
        /** Returns true if this geometry has a texture
        */
        inline bool HasTexture() const { return mHasTexture; }
        

        //////////////
        //-- these functions return the specified data
        //-- only if deleteData has not been switched on in the consruction

        Vector3 *GetVertices(int &numVertices) const;

        Vector3 *GetNormals(int &numNormals) const;

        Vector3 *GetTangents(int &numTangents) const;

        Texcoord2 *GetTexCoords(int &numTexCoords) const;


protected:

        /** Calculates the bounding box from the vertices.
        */
        void CalcBoundingBox();
        /** Prepare vbos for rendering
        */
        void Prepare();


        //////////

        Vector3 *mVertices;

        Vector3 *mNormals;

        Vector3 *mTangents;

        Texcoord2 *mTexCoords;

        unsigned int *mIndices;

        unsigned int mVboId;
        unsigned int mVboId2;

        int mNumVertices;

        AxisAlignedBox3 mBoundingBox;

        bool mHasTexture;

        bool mHasTangents;
};


}

#endif // GEOMETRY_H