btSoftBodyRigidBodyCollisionConfiguration.cpp

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2006 Erwin Coumans  https://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.
*/
 
#include "btSoftBodyRigidBodyCollisionConfiguration.h"
#include "btSoftRigidCollisionAlgorithm.h"
#include "btSoftBodyConcaveCollisionAlgorithm.h"
#include "btSoftSoftCollisionAlgorithm.h"
 
#include "LinearMath/btPoolAllocator.h"
 
#define ENABLE_SOFTBODY_CONCAVE_COLLISIONS 1
 
btSoftBodyRigidBodyCollisionConfiguration::btSoftBodyRigidBodyCollisionConfiguration(const btDefaultCollisionConstructionInfo& constructionInfo)
        : btDefaultCollisionConfiguration(constructionInfo)
{
        void* mem;
 
        mem = btAlignedAlloc(sizeof(btSoftSoftCollisionAlgorithm::CreateFunc), 16);
        m_softSoftCreateFunc = new (mem) btSoftSoftCollisionAlgorithm::CreateFunc;
 
        mem = btAlignedAlloc(sizeof(btSoftRigidCollisionAlgorithm::CreateFunc), 16);
        m_softRigidConvexCreateFunc = new (mem) btSoftRigidCollisionAlgorithm::CreateFunc;
 
        mem = btAlignedAlloc(sizeof(btSoftRigidCollisionAlgorithm::CreateFunc), 16);
        m_swappedSoftRigidConvexCreateFunc = new (mem) btSoftRigidCollisionAlgorithm::CreateFunc;
        m_swappedSoftRigidConvexCreateFunc->m_swapped = true;
 
#ifdef ENABLE_SOFTBODY_CONCAVE_COLLISIONS
        mem = btAlignedAlloc(sizeof(btSoftBodyConcaveCollisionAlgorithm::CreateFunc), 16);
        m_softRigidConcaveCreateFunc = new (mem) btSoftBodyConcaveCollisionAlgorithm::CreateFunc;
 
        mem = btAlignedAlloc(sizeof(btSoftBodyConcaveCollisionAlgorithm::CreateFunc), 16);
        m_swappedSoftRigidConcaveCreateFunc = new (mem) btSoftBodyConcaveCollisionAlgorithm::SwappedCreateFunc;
        m_swappedSoftRigidConcaveCreateFunc->m_swapped = true;
#endif
 
        //replace pool by a new one, with potential larger size
 
        if (m_ownsCollisionAlgorithmPool && m_collisionAlgorithmPool)
        {
                int curElemSize = m_collisionAlgorithmPool->getElementSize();
 
                int maxSize0 = sizeof(btSoftSoftCollisionAlgorithm);
                int maxSize1 = sizeof(btSoftRigidCollisionAlgorithm);
                int maxSize2 = sizeof(btSoftBodyConcaveCollisionAlgorithm);
 
                int collisionAlgorithmMaxElementSize = btMax(maxSize0, maxSize1);
                collisionAlgorithmMaxElementSize = btMax(collisionAlgorithmMaxElementSize, maxSize2);
 
                if (collisionAlgorithmMaxElementSize > curElemSize)
                {
                        m_collisionAlgorithmPool->~btPoolAllocator();
                        btAlignedFree(m_collisionAlgorithmPool);
                        void* mem = btAlignedAlloc(sizeof(btPoolAllocator), 16);
                        m_collisionAlgorithmPool = new (mem) btPoolAllocator(collisionAlgorithmMaxElementSize, constructionInfo.m_defaultMaxCollisionAlgorithmPoolSize);
                }
        }
}
 
btSoftBodyRigidBodyCollisionConfiguration::~btSoftBodyRigidBodyCollisionConfiguration()
{
        m_softSoftCreateFunc->~btCollisionAlgorithmCreateFunc();
        btAlignedFree(m_softSoftCreateFunc);
 
        m_softRigidConvexCreateFunc->~btCollisionAlgorithmCreateFunc();
        btAlignedFree(m_softRigidConvexCreateFunc);
 
        m_swappedSoftRigidConvexCreateFunc->~btCollisionAlgorithmCreateFunc();
        btAlignedFree(m_swappedSoftRigidConvexCreateFunc);
 
#ifdef ENABLE_SOFTBODY_CONCAVE_COLLISIONS
        m_softRigidConcaveCreateFunc->~btCollisionAlgorithmCreateFunc();
        btAlignedFree(m_softRigidConcaveCreateFunc);
 
        m_swappedSoftRigidConcaveCreateFunc->~btCollisionAlgorithmCreateFunc();
        btAlignedFree(m_swappedSoftRigidConcaveCreateFunc);
#endif
}
 
btCollisionAlgorithmCreateFunc* btSoftBodyRigidBodyCollisionConfiguration::getCollisionAlgorithmCreateFunc(int proxyType0, int proxyType1)
{
 
        if ((proxyType0 == SOFTBODY_SHAPE_PROXYTYPE) && (proxyType1 == SOFTBODY_SHAPE_PROXYTYPE))
        {
                return m_softSoftCreateFunc;
        }
 
        if (proxyType0 == SOFTBODY_SHAPE_PROXYTYPE && btBroadphaseProxy::isConvex(proxyType1))
        {
                return m_softRigidConvexCreateFunc;
        }
 
        if (btBroadphaseProxy::isConvex(proxyType0) && proxyType1 == SOFTBODY_SHAPE_PROXYTYPE)
        {
                return m_swappedSoftRigidConvexCreateFunc;
        }
 
#ifdef ENABLE_SOFTBODY_CONCAVE_COLLISIONS
        if (proxyType0 == SOFTBODY_SHAPE_PROXYTYPE && btBroadphaseProxy::isConcave(proxyType1))
        {
                return m_softRigidConcaveCreateFunc;
        }
 
        if (btBroadphaseProxy::isConcave(proxyType0) && proxyType1 == SOFTBODY_SHAPE_PROXYTYPE)
        {
                return m_swappedSoftRigidConcaveCreateFunc;
        }
#endif
 
        return btDefaultCollisionConfiguration::getCollisionAlgorithmCreateFunc(proxyType0, proxyType1);
}