btStridingMeshInterface.h

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2009 Erwin Coumans  http://bulletphysics.org
 
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_STRIDING_MESHINTERFACE_H
#define BT_STRIDING_MESHINTERFACE_H
 
#include "LinearMath/btVector3.h"
#include "btTriangleCallback.h"
#include "btConcaveShape.h"

ATTRIBUTE_ALIGNED16(class)
btStridingMeshInterface
{
protected:
    btVector3 m_scaling;
 
public:
    BT_DECLARE_ALIGNED_ALLOCATOR();
 
    btStridingMeshInterface() : m_scaling(btScalar(1.), btScalar(1.), btScalar(1.))
    {
    }
 
    virtual ~btStridingMeshInterface();
 
    virtual void InternalProcessAllTriangles(btInternalTriangleIndexCallback * callback, const btVector3& aabbMin, const btVector3& aabbMax) const;

    void calculateAabbBruteForce(btVector3 & aabbMin, btVector3 & aabbMax);

    virtual void getLockedVertexIndexBase(unsigned char** vertexbase, int& numverts, PHY_ScalarType& type, int& stride, unsigned char** indexbase, int& indexstride, int& numfaces, PHY_ScalarType& indicestype, int subpart = 0) = 0;
 
    virtual void getLockedReadOnlyVertexIndexBase(const unsigned char** vertexbase, int& numverts, PHY_ScalarType& type, int& stride, const unsigned char** indexbase, int& indexstride, int& numfaces, PHY_ScalarType& indicestype, int subpart = 0) const = 0;

    virtual void unLockVertexBase(int subpart) = 0;
 
    virtual void unLockReadOnlyVertexBase(int subpart) const = 0;

    virtual int getNumSubParts() const = 0;
 
    virtual void preallocateVertices(int numverts) = 0;
    virtual void preallocateIndices(int numindices) = 0;
 
    virtual bool hasPremadeAabb() const { return false; }
    virtual void setPremadeAabb(const btVector3& aabbMin, const btVector3& aabbMax) const
    {
        (void)aabbMin;
        (void)aabbMax;
    }
    virtual void getPremadeAabb(btVector3 * aabbMin, btVector3 * aabbMax) const
    {
        (void)aabbMin;
        (void)aabbMax;
    }
 
    const btVector3& getScaling() const
    {
        return m_scaling;
    }
    void setScaling(const btVector3& scaling)
    {
        m_scaling = scaling;
    }
 
    virtual int calculateSerializeBufferSize() const;

    virtual const char* serialize(void* dataBuffer, btSerializer* serializer) const;
};
 
struct btIntIndexData
{
    int m_value;
};
 
struct btShortIntIndexData
{
    short m_value;
    char m_pad[2];
};
 
struct btShortIntIndexTripletData
{
    short m_values[3];
    char m_pad[2];
};
 
struct btCharIndexTripletData
{
    unsigned char m_values[3];
    char m_pad;
};
 
// clang-format off

struct  btMeshPartData
{
    btVector3FloatData          *m_vertices3f;
    btVector3DoubleData         *m_vertices3d;
 
    btIntIndexData              *m_indices32;
    btShortIntIndexTripletData  *m_3indices16;
    btCharIndexTripletData      *m_3indices8;
 
    btShortIntIndexData         *m_indices16;//backwards compatibility
 
    int                     m_numTriangles;//length of m_indices = m_numTriangles
    int                     m_numVertices;
};
 

struct  btStridingMeshInterfaceData
{
    btMeshPartData  *m_meshPartsPtr;
    btVector3FloatData  m_scaling;
    int m_numMeshParts;
    char m_padding[4];
};
 
// clang-format on
 
SIMD_FORCE_INLINE int btStridingMeshInterface::calculateSerializeBufferSize() const
{
    return sizeof(btStridingMeshInterfaceData);
}
 
#endif  //BT_STRIDING_MESHINTERFACE_H