added GIMPACT update from Francisco. Thanks!
This commit is contained in:
ejcoumans
@@ -24,9 +24,44 @@ Concave-Concave Collision
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#include "btConcaveConcaveCollisionAlgorithm.h"
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#include "BulletCollision/CollisionDispatch/btCollisionObject.h"
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#include "btGIMPACTMeshShape.h"
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#include "../Extras/GIMPACT/include/GIMPACT/gimpact.h"
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#include "BulletCollision/CollisionShapes/btStaticPlaneShape.h"
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#include "GIMPACT/gimpact.h"
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//! Class for accessing the plane ecuation
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class btPlaneShape : public btStaticPlaneShape
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{
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public:
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void get_plane_equation(float equation[4])
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{
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equation[0] = m_planeNormal[0];
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equation[1] = m_planeNormal[1];
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equation[2] = m_planeNormal[2];
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equation[3] = m_planeConstant;
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}
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void get_plane_equation_transformed(const btTransform & trans,float equation[4])
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{
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/*mat4f plane_trans;
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IDENTIFY_MATRIX_4X4(plane_trans);
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COPY_MATRIX_3X3(plane_trans,trans.getBasis());
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MAT_SET_TRANSLATION(plane_trans,trans.getOrigin());
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float ptemp[4]
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//vec4f ptemp;
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get_plane_equation(ptemp);
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MAT_TRANSFORM_PLANE_4X4(equation,plane_trans,ptemp);*/
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equation[0] = trans.getBasis().getRow(0).dot(m_planeNormal);
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equation[1] = trans.getBasis().getRow(1).dot(m_planeNormal);
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equation[2] = trans.getBasis().getRow(2).dot(m_planeNormal);
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equation[3] = trans.getOrigin().dot(m_planeNormal) + m_planeConstant;
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}
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};
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btConcaveConcaveCollisionAlgorithm::btConcaveConcaveCollisionAlgorithm( const btCollisionAlgorithmConstructionInfo& ci, btCollisionObject* body0,btCollisionObject* body1)
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: btCollisionAlgorithm(ci)
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{
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@@ -61,70 +96,371 @@ void process_gimpact_contacts(GIM_CONTACT * pcontacts,
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btConcaveConcaveCollisionAlgorithm * algorithm,
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btCollisionObject* body0,
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btCollisionObject* body1,
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btManifoldResult* resultOut)
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btManifoldResult* resultOut, bool swapped = false)
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{
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int i, ci = MANIFOLD_CACHE_SIZE;//Max point size
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btPersistentManifold * current_mainfold = 0;
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btCollisionObject* pbody0 = swapped?body1:body0;
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btCollisionObject* pbody1 = swapped?body0:body1;
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float csign = swapped?-1.f:1.f;
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btVector3 cpoint;
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btVector3 cnormal;
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for(i=0;i<contact_count;i++)
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{
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if(ci>=MANIFOLD_CACHE_SIZE)
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{
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current_mainfold = algorithm->newContactMainfold(body0,body1);
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current_mainfold = algorithm->newContactMainfold(pbody0,pbody1);
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resultOut->setPersistentManifold(current_mainfold);
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ci=0;
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}
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btVector3 cpoint(pcontacts->m_point[0],pcontacts->m_point[1],pcontacts->m_point[2]);
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cpoint.setValue(pcontacts->m_point[0],pcontacts->m_point[1],pcontacts->m_point[2]);
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//Normal points to body0
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btVector3 cnormal(pcontacts->m_normal[0],pcontacts->m_normal[1],pcontacts->m_normal[2]);
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cnormal.setValue(csign*pcontacts->m_normal[0],csign*pcontacts->m_normal[1],csign*pcontacts->m_normal[2]);
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resultOut->addContactPoint(cnormal,cpoint,-pcontacts->m_depth);
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pcontacts++;
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ci++;
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}
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}
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void process_gimpact_plane_contacts(vec4f * pcontacts,
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vec4f planenormal,
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int contact_count,
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btConcaveConcaveCollisionAlgorithm * algorithm,
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btCollisionObject* body0,
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btCollisionObject* body1,
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btManifoldResult* resultOut, bool swapped = false)
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{
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int i, ci = MANIFOLD_CACHE_SIZE;//Max point size
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btPersistentManifold * current_mainfold = 0;
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btCollisionObject* pbody0 = swapped?body1:body0;
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btCollisionObject* pbody1 = swapped?body0:body1;
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float csign = swapped?-1.f:1.f;
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btVector3 cpoint;
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btVector3 cnormal;
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for(i=0;i<contact_count;i++)
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{
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if(ci>=MANIFOLD_CACHE_SIZE)
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{
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current_mainfold = algorithm->newContactMainfold(pbody0,pbody1);
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resultOut->setPersistentManifold(current_mainfold);
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ci=0;
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}
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cpoint.setValue(pcontacts[i][0],pcontacts[i][1],pcontacts[i][2]);
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//Normal points to body0
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cnormal.setValue(csign*planenormal[0],csign*planenormal[1],csign*planenormal[2]);
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resultOut->addContactPoint(cnormal,cpoint,-pcontacts[i][3]);
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ci++;
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}
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}
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class CONCAVE_TRIANGLE_TOKEN
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{
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public:
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GIM_TRIANGLE_DATA m_tridata;
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int partId;
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int triangleIndex;
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CONCAVE_TRIANGLE_TOKEN()
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{
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m_tridata.m_has_planes = 0;
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partId = 0;
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triangleIndex = 0;
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}
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CONCAVE_TRIANGLE_TOKEN(const CONCAVE_TRIANGLE_TOKEN & token)
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{
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m_tridata.m_has_planes = 0;
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VEC_COPY(m_tridata.m_vertices[0],token.m_tridata.m_vertices[0]);
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VEC_COPY(m_tridata.m_vertices[1],token.m_tridata.m_vertices[1]);
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VEC_COPY(m_tridata.m_vertices[2],token.m_tridata.m_vertices[2]);
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partId = token.partId;
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triangleIndex = token.triangleIndex;
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}
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};
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void bt_gimpact_gimpact_collision(btConcaveConcaveCollisionAlgorithm * algorithm,
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btCollisionObject* body0,
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btCollisionObject* body1,
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btManifoldResult* resultOut)
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{
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btGIMPACTMeshShape* tri0b = static_cast<btGIMPACTMeshShape*>( body0->getCollisionShape());
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btGIMPACTMeshShape* tri1b = static_cast<btGIMPACTMeshShape*>( body1->getCollisionShape());
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tri0b->prepareMeshes(body0->getWorldTransform());
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tri1b->prepareMeshes(body1->getWorldTransform());
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size_t i,j;
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size_t parts0 = tri0b->m_gim_trimesh_parts.size();
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size_t parts1 = tri1b->m_gim_trimesh_parts.size();
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GIM_TRIMESH * trimesh0;
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GIM_TRIMESH * trimesh1;
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GDYNAMIC_ARRAY contacts;
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GIM_CONTACT * pcontacts;
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for(i=0;i<parts0;i++)
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{
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for(j=0;j<parts1;j++)
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{
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trimesh0 = (GIM_TRIMESH * )tri0b->m_gim_trimesh_parts[i];
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trimesh1 = (GIM_TRIMESH * )tri1b->m_gim_trimesh_parts[j];
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GIM_CREATE_CONTACT_LIST(contacts);
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gim_trimesh_trimesh_collision(trimesh0,trimesh1,&contacts);
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if(contacts.m_size>0)
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{
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pcontacts = GIM_DYNARRAY_POINTER(GIM_CONTACT,contacts);
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process_gimpact_contacts(pcontacts,contacts.m_size,algorithm,body0,body1,resultOut);
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}
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GIM_DYNARRAY_DESTROY(contacts);
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}
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}
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}
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void bt_gimpact_plane_collision(btConcaveConcaveCollisionAlgorithm * algorithm,
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btCollisionObject* tribody0,
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btCollisionObject* planebody1,
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btManifoldResult* resultOut,bool swapped)
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{
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btGIMPACTMeshShape* tri0b = static_cast<btGIMPACTMeshShape*>( tribody0->getCollisionShape());
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btPlaneShape * plane1b = static_cast<btPlaneShape *>( planebody1->getCollisionShape());
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tri0b->prepareMeshes(tribody0->getWorldTransform());
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////////////////////////////////Getting plane////////////////////////////////////
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vec4f pnormal;
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plane1b->get_plane_equation_transformed(planebody1->getWorldTransform(),pnormal);
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////////////////////////////////End Getting plane////////////////////////////////////
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size_t i;
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size_t parts0 = tri0b->m_gim_trimesh_parts.size();
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GIM_TRIMESH * trimesh0;
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GDYNAMIC_ARRAY contacts;
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vec4f * pcontacts;
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for(i=0;i<parts0;i++)
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{
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trimesh0 = (GIM_TRIMESH * )tri0b->m_gim_trimesh_parts[i];
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GIM_CREATE_TRIMESHPLANE_CONTACTS(contacts);
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gim_trimesh_plane_collision(trimesh0,pnormal,&contacts);
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if(contacts.m_size>0)
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{
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pcontacts = GIM_DYNARRAY_POINTER(vec4f,contacts);
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process_gimpact_plane_contacts(pcontacts,pnormal,
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contacts.m_size,algorithm,tribody0,planebody1,resultOut,swapped);
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}
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GIM_DYNARRAY_DESTROY(contacts);
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}
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}
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///For each triangle in the concave mesh that overlaps with the AABB of a convex (m_convexProxy), processTriangle is called.
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class btConcaveTriangleCallback : public btTriangleCallback
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{
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public:
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btCollisionObject* m_body;
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mat4f m_transform;
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std::vector<CONCAVE_TRIANGLE_TOKEN> m_triangles;
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btConcaveTriangleCallback(btCollisionObject* body)
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{
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m_body = body;
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IDENTIFY_MATRIX_4X4(m_transform);
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COPY_MATRIX_3X3(m_transform,body->getWorldTransform().getBasis());
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MAT_SET_TRANSLATION(m_transform,body->getWorldTransform().getOrigin());
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m_triangles.reserve(100);
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}
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void setTimeStepAndCounters(float collisionMarginTriangle,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut)
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{}
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virtual ~btConcaveTriangleCallback(){
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}
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virtual void processTriangle(btVector3* triangle, int partId, int triangleIndex)
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{
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CONCAVE_TRIANGLE_TOKEN token;
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token.m_tridata.m_has_planes = 0;
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token.partId = partId;
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token.triangleIndex = triangleIndex;
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//Copy vertices
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MAT_DOT_VEC_3X4(token.m_tridata.m_vertices[0],m_transform,triangle[0]);
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MAT_DOT_VEC_3X4(token.m_tridata.m_vertices[1],m_transform,triangle[1]);
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MAT_DOT_VEC_3X4(token.m_tridata.m_vertices[2],m_transform,triangle[2]);
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m_triangles.push_back(token);
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}
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void clearCache(){}
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};
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void bt_concave_concave_collision(btConcaveConcaveCollisionAlgorithm * algorithm,
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btCollisionObject* tribody0,
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btCollisionObject* tribody1,
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btManifoldResult* resultOut)
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{
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ConcaveShape* tri0b = static_cast<ConcaveShape*>( tribody0->getCollisionShape());
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ConcaveShape* tri1b = static_cast<ConcaveShape*>( tribody1->getCollisionShape());
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//Get First AABB
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btVector3 aabbMin0,aabbMax0;
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tri0b->getAabb(tribody0->getWorldTransform(),aabbMin0,aabbMax0);
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//Get Second AABB
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btVector3 aabbMin1,aabbMax1;
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tri1b->getAabb(tribody1->getWorldTransform(),aabbMin1,aabbMax1);
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//Transform boxes to local spaces
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aabb3f aabb0 = {
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aabbMin0[0],aabbMax0[0],
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aabbMin0[1],aabbMax0[1],
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aabbMin0[2],aabbMax0[2],
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};
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aabb3f aabb1 = {
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aabbMin1[0],aabbMax1[0],
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aabbMin1[1],aabbMax1[1],
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aabbMin1[2],aabbMax1[2],
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};
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mat4f transform;
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IDENTIFY_MATRIX_4X4(transform);
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// body0 inverse transform
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btTransform transinv = tribody0->getWorldTransform().inverse();
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COPY_MATRIX_3X3(transform,transinv.getBasis());
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MAT_SET_TRANSLATION(transform,transinv.getOrigin());
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//Transform box1 to body0 space
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AABB_TRANSFORM(aabb1,aabb1,transform);
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AABB_GET_MIN(aabb1,aabbMin1);
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AABB_GET_MAX(aabb1,aabbMax1);
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btConcaveTriangleCallback callback0(tribody0);
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tri0b->processAllTriangles(&callback0,aabbMin1,aabbMax1);
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if(callback0.m_triangles.size()==0) return;
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// body1 inverse transform
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transinv = tribody1->getWorldTransform().inverse();
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COPY_MATRIX_3X3(transform,transinv.getBasis());
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MAT_SET_TRANSLATION(transform,transinv.getOrigin());
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//Transform box0 to body1 space
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AABB_TRANSFORM(aabb0,aabb0,transform);
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AABB_GET_MIN(aabb0,aabbMin0);
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AABB_GET_MAX(aabb0,aabbMax0);
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btConcaveTriangleCallback callback1(tribody1);
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tri1b->processAllTriangles(&callback1,aabbMin0,aabbMax0);
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if(callback1.m_triangles.size()==0) return;
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////////////////////////////////Collide triangles////////////////////////////////////
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//dummy contacts
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GDYNAMIC_ARRAY dummycontacts;
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GIM_CREATE_CONTACT_LIST(dummycontacts);
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//Auxiliary triangle data
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GIM_TRIANGLE_CONTACT_DATA tri_contact_data;
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size_t i,j,ci;
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int colresult;
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for(i=0;i<callback0.m_triangles.size();i++)
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{
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for(j=0;j<callback1.m_triangles.size();j++)
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{
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//collide triangles
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colresult = gim_triangle_triangle_collision(
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&callback0.m_triangles[i].m_tridata,
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&callback1.m_triangles[j].m_tridata,&tri_contact_data);
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if(colresult == 1)
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{
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//Add contacts
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for (ci=0;ci<tri_contact_data.m_point_count ;ci++ )
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{
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GIM_PUSH_CONTACT(dummycontacts, tri_contact_data.m_points[ci],tri_contact_data.m_separating_normal ,tri_contact_data.m_penetration_depth,tribody0, tribody1, callback0.m_triangles[i].triangleIndex, callback1.m_triangles[j].triangleIndex);
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}
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}
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}
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}
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if(dummycontacts.m_size == 0) //reject
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{
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GIM_DYNARRAY_DESTROY(dummycontacts);
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return;
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}
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//dummy contacts
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GDYNAMIC_ARRAY contacts;
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GIM_CREATE_CONTACT_LIST(contacts);
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//merge contacts
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gim_merge_contacts(&dummycontacts,&contacts);
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GIM_CONTACT * pcontacts = GIM_DYNARRAY_POINTER(GIM_CONTACT,contacts);
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process_gimpact_contacts(pcontacts,contacts.m_size,algorithm,tribody0,tribody1,resultOut);
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//Terminate
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GIM_DYNARRAY_DESTROY(dummycontacts);
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GIM_DYNARRAY_DESTROY(contacts);
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}
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void btConcaveConcaveCollisionAlgorithm::processCollision (btCollisionObject* body0,btCollisionObject* body1,const btDispatcherInfo& dispatchInfo,btManifoldResult* resultOut)
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{
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clearCache();
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if (body0->getCollisionShape()->getShapeType()==GIMPACT_SHAPE_PROXYTYPE && body1->getCollisionShape()->getShapeType()==GIMPACT_SHAPE_PROXYTYPE )
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{
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btGIMPACTMeshShape* tri0b = static_cast<btGIMPACTMeshShape*>( body0->getCollisionShape());
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btGIMPACTMeshShape* tri1b = static_cast<btGIMPACTMeshShape*>( body1->getCollisionShape());
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tri0b->prepareMeshes(body0->getWorldTransform());
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tri1b->prepareMeshes(body1->getWorldTransform());
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size_t i,j;
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size_t parts0 = tri0b->m_gim_trimesh_parts.size();
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size_t parts1 = tri1b->m_gim_trimesh_parts.size();
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GIM_TRIMESH * trimesh0;
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GIM_TRIMESH * trimesh1;
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GDYNAMIC_ARRAY contacts;
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GIM_CONTACT * pcontacts;
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for(i=0;i<parts0;i++)
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{
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for(j=0;j<parts1;j++)
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{
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trimesh0 = (GIM_TRIMESH * )tri0b->m_gim_trimesh_parts[i];
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trimesh1 = (GIM_TRIMESH * )tri1b->m_gim_trimesh_parts[j];
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GIM_CREATE_CONTACT_LIST(contacts);
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gim_trimesh_trimesh_collision(trimesh0,trimesh1,&contacts);
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if(contacts.m_size>0)
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{
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pcontacts = GIM_DYNARRAY_POINTER(GIM_CONTACT,contacts);
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process_gimpact_contacts(pcontacts,contacts.m_size,this,body0,body1,resultOut);
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}
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||||
GIM_DYNARRAY_DESTROY(contacts);
|
||||
}
|
||||
}
|
||||
bt_gimpact_gimpact_collision(this,body0,body1,resultOut);
|
||||
}
|
||||
else if (body0->getCollisionShape()->getShapeType()==STATIC_PLANE_PROXYTYPE&& body1->getCollisionShape()->getShapeType()==GIMPACT_SHAPE_PROXYTYPE )
|
||||
{
|
||||
bt_gimpact_plane_collision(this,body1,body0,resultOut,true);
|
||||
}
|
||||
else if (body0->getCollisionShape()->getShapeType()==GIMPACT_SHAPE_PROXYTYPE&& body1->getCollisionShape()->getShapeType()==STATIC_PLANE_PROXYTYPE)
|
||||
{
|
||||
bt_gimpact_plane_collision(this,body0,body1,resultOut,false);
|
||||
}
|
||||
else if(body0->getCollisionShape()->isConcave() && body1->getCollisionShape()->isConcave() )
|
||||
{
|
||||
bt_concave_concave_collision(this,body0,body1,resultOut);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -134,3 +470,19 @@ float btConcaveConcaveCollisionAlgorithm::calculateTimeOfImpact(btCollisionObjec
|
||||
return 1.f;
|
||||
|
||||
}
|
||||
|
||||
///////////////////////////////////// REGISTERING ALGORITHM //////////////////////////////////////////////
|
||||
|
||||
|
||||
//! Use this function for register the algorithm externally
|
||||
void btConcaveConcaveCollisionAlgorithm::registerAlgorithm(btCollisionDispatcher * dispatcher)
|
||||
{
|
||||
dispatcher->registerCollisionCreateFunc(GIMPACT_SHAPE_PROXYTYPE,GIMPACT_SHAPE_PROXYTYPE ,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(GIMPACT_SHAPE_PROXYTYPE,STATIC_PLANE_PROXYTYPE ,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(STATIC_PLANE_PROXYTYPE,GIMPACT_SHAPE_PROXYTYPE ,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(GIMPACT_SHAPE_PROXYTYPE,TRIANGLE_MESH_SHAPE_PROXYTYPE,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(TRIANGLE_MESH_SHAPE_PROXYTYPE,GIMPACT_SHAPE_PROXYTYPE,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(STATIC_PLANE_PROXYTYPE,TRIANGLE_MESH_SHAPE_PROXYTYPE,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(TRIANGLE_MESH_SHAPE_PROXYTYPE,STATIC_PLANE_PROXYTYPE,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
dispatcher->registerCollisionCreateFunc(TRIANGLE_MESH_SHAPE_PROXYTYPE,TRIANGLE_MESH_SHAPE_PROXYTYPE,new btConcaveConcaveCollisionAlgorithm::CreateFunc);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user