I am trying to convert the DX10 mesh into Phyx mesh. I am getting an error " Unhandled exception at 0x004abb18 in DXPHYSX.exe:0xC0000005:Access Violation reading location 0x0057b270.
void Mesh::CreatePhysxActor(){ ///Copy Mesh data into PhysX Mesh Data m_PhysXVerts.clear(); m_PhysXIndices.clear(); for ( unsigned int i = 0; i < m_Vertices.size(); i++ ) { m_PhysXVerts.push_back(NxVec3(m_Vertices.vPosition.x, m_Vertices.vPosition.y, m_Vertices.vPosition.z)); } for ( unsigned int i = 0; i < m_Indices.size(); i++ ) { m_PhysXIndices.push_back(m_Indices); } NxVec3* _pVerts = new NxVec3[m_PhysXVerts.size()/3]; NxU16* _pTriangles = new NxU16[m_PhysXIndices.size()/3]; //Build Physical Model NxTriangleMeshDesc _triangleDesc; _triangleDesc.numVertices = (NxU32)(m_PhysXVerts.size()/3); _triangleDesc.numTriangles = (NxU32)(m_PhysXIndices.size()/3); _triangleDesc.pointStrideBytes = sizeof(NxVec3); _triangleDesc.triangleStrideBytes = sizeof(NxU32) * 3; _triangleDesc.points = _pVerts; _triangleDesc.triangles = _pTriangles; _triangleDesc.flags = NX_MF_16_BIT_INDICES; NxTriangleMeshShapeDesc _triangleMeshShapeDesc; NxInitCooking(); //Cooking from Memory MemoryWriteBuffer _writeBuff; bool bStatus = NxCookTriangleMesh(_triangleDesc, UserStream("C:\stream.bin", false)); _triangleMeshShapeDesc.meshData = PhysicsManager::GetInstance()->GetPhysicsSDKptr()->createTriangleMesh( UserStream("C:\stream.bin", true)); NxCloseCooking(); NxActorDesc _actorDesc; _actorDesc.shapes.pushBack(&_triangleMeshShapeDesc); _actorDesc.globalPose.t = NxVec3(m_sNodeInfo.m_sTransformation.m_vTranslation.x, m_sNodeInfo.m_sTransformation.m_vTranslation.y, m_sNodeInfo.m_sTransformation.m_vTranslation.z); m_sNodeInfo.m_pActor = PhysicsManager::GetInstance()->GetPhysXScene()->createActor(_actorDesc);}[\source]
I see a few things that are problems. The first biggie is that when you allocate _pVerts you are allocating a too small array. You must not divide m_PhysXVerts.size() by 3! You need _pVerts to have just as many elements as m_PhysXVerts. Same exact thing with _pTriangles. You must not divide m_PhysXIndices.size() by 3 to get the size of the _pTriangles array. Then, same deal when assigning _triangleDesc.numVertices and .numTriangles. Don't divide by 3. The point and triangle stride stuff, I think that looks okay.
Next super big problem...when you assign _triangleDesc.points to be _pVerts, please note that _pVerts doesn't actually have any data in it! You have allocated arrays but you didn't actually put the vertex data into it. Your vertex data is in m_PhysXVerts, but _pVerts is just a blank array that happens to be sized based on m_PhysXverts. You need to put the data into _pVerts. Same deal with _pTriangles. As you have the code, it does not actually contain the indices, which are in m_PhysXIndices but not in _pTriangles.
My suggestion would be to skip m_PhysXVerts and m_PhysXTriangles. Unless you need them later on, just get rid of them and populate _pVerts and _pTriangles up above instead of populating m_PhysX*. (Well, perhaps you're using them for debug visualization? I don't know. You do not use them for anything here, really.)
Graham Rhodes Moderator, Math & Physics forum @ gamedev.net
///Copy Mesh data into PhysX Mesh Data m_PhysXVerts.clear(); m_PhysXIndices.clear(); NxVec3* _pVerts = new NxVec3[m_Vertices.size()]; NxU16* _pTriangles = new NxU16[m_Indices.size()]; for ( unsigned int i = 0; i < m_Vertices.size(); i++ ) { m_PhysXVerts.push_back(NxVec3(m_Vertices.vPosition.x, m_Vertices.vPosition.y, m_Vertices.vPosition.z)); _pVerts = &m_PhysXVerts; } for ( unsigned int i = 0; i < m_Indices.size(); i++ ) { m_PhysXIndices.push_back(m_Indices); _pTriangles = &m_PhysXIndices; } //Build Physical Model NxTriangleMeshDesc _triangleDesc; _triangleDesc.numVertices = (NxU32)(m_PhysXVerts.size()); _triangleDesc.numTriangles = (NxU32)(m_PhysXIndices.size()); _triangleDesc.pointStrideBytes = sizeof(NxVec3); _triangleDesc.triangleStrideBytes = sizeof(NxU32) * 3; _triangleDesc.points = _pVerts; _triangleDesc.triangles = _pTriangles; _triangleDesc.flags = NX_MF_16_BIT_INDICES; NxTriangleMeshShapeDesc _triangleMeshShapeDesc; NxInitCooking(); //Cooking from Memory MemoryWriteBuffer _writeBuff; bool bStatus = NxCookTriangleMesh(_triangleDesc, _writeBuff); _triangleMeshShapeDesc.meshData = PhysicsManager::GetInstance()->GetPhysicsSDKptr()->createTriangleMesh( MemoryReadBuffer(_writeBuff.data) ); NxCloseCooking(); NxActorDesc _actorDesc; _actorDesc.shapes.pushBack(&_triangleMeshShapeDesc); _actorDesc.globalPose.t = NxVec3(m_sNodeInfo.m_sTransformation.m_vTranslation.x, m_sNodeInfo.m_sTransformation.m_vTranslation.y, m_sNodeInfo.m_sTransformation.m_vTranslation.z); m_sNodeInfo.m_pActor = PhysicsManager::GetInstance()->GetPhysXScene()->createActor(_actorDesc);
Thanks for the reply. The above is the modified code.. still the error i receive is Unhandled exception at 0x0026bb18 in MultiThreaded_DX.exe: 0xC0000005: Access violation reading location 0x003ebda0. in the line
