btSoftBodySolverVertexBuffer.h

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/

This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, 
including commercial applications, and to alter it and redistribute it freely, 
subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/

#ifndef BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H
#define BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H


class btVertexBufferDescriptor
{
public:
        enum BufferTypes
        {
                CPU_BUFFER,
                DX11_BUFFER,
                OPENGL_BUFFER
        };

protected:      

        bool m_hasVertexPositions;
        bool m_hasNormals;

        int m_vertexOffset;
        int m_vertexStride;

        int m_normalOffset;
        int m_normalStride;

public:
        btVertexBufferDescriptor()
        {
                m_hasVertexPositions = false;
                m_hasNormals = false;
                m_vertexOffset = 0;
                m_vertexStride = 0;
                m_normalOffset = 0;
                m_normalStride = 0;
        }

        virtual ~btVertexBufferDescriptor()
        {

        }

        virtual bool hasVertexPositions() const
        {
                return m_hasVertexPositions;
        }

        virtual bool hasNormals() const
        {
                return m_hasNormals;
        }

        virtual BufferTypes getBufferType() const = 0;

        virtual int getVertexOffset() const
        {
                return m_vertexOffset;
        }

        virtual int getVertexStride() const
        {
                return m_vertexStride;
        }

        virtual int getNormalOffset() const
        {
                return m_normalOffset;
        }

        virtual int getNormalStride() const
        {
                return m_normalStride;
        }
};


class btCPUVertexBufferDescriptor : public btVertexBufferDescriptor
{
protected:
        float *m_basePointer;

public:
        btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride )
        {
                m_basePointer = basePointer;
                m_vertexOffset = vertexOffset;
                m_vertexStride = vertexStride;
                m_hasVertexPositions = true;
        }

        btCPUVertexBufferDescriptor( float *basePointer, int vertexOffset, int vertexStride, int normalOffset, int normalStride )
        {
                m_basePointer = basePointer;

                m_vertexOffset = vertexOffset;
                m_vertexStride = vertexStride;
                m_hasVertexPositions = true;

                m_normalOffset = normalOffset;
                m_normalStride = normalStride;
                m_hasNormals = true;
        }

        virtual ~btCPUVertexBufferDescriptor()
        {

        }

        virtual BufferTypes getBufferType() const
        {
                return CPU_BUFFER;
        }

        virtual float *getBasePointer() const
        {
                return m_basePointer;
        }
};

#endif // #ifndef BT_SOFT_BODY_SOLVER_VERTEX_BUFFER_H