bool GameObject::CreateTriangleMesh( CPhysX const * pPhysX )
{
bool bResult = false;
if( pPhysX && pPhysX->GetPhysics() && !m_BufVertices.empty() && !m_BufIndices.empty() )
{
uint NumVerticies = m_BufVertices.size() / 3;
uint NumTriangles = m_BufIndices.size() / 3;
//Create pointer for vertices
physx::PxVec3* verts = new physx::PxVec3[ NumVerticies ];
int ii = -1;
for( uint i = 0; i < NumVerticies; ++i )
{
++ii;
verts[ i ].x = m_BufVertices[ ii ];
verts[ i ].y = m_BufVertices[ ++ii ];
verts[ i ].z = m_BufVertices[ ++ii ];
}
//Create pointer for indices
physx::PxU16 *tris = new physx::PxU16[ m_BufIndices.size() ];
for( uint i = 0; i < m_BufIndices.size(); ++i )
tris[ i ] = m_BufIndices[ i ];
// Build physical model
physx::PxTriangleMeshDesc TriMeshDesc;
TriMeshDesc.points.count = NumVerticies;
TriMeshDesc.points.stride = sizeof(physx::PxVec3);
TriMeshDesc.points.data = verts;
TriMeshDesc.triangles.count = NumTriangles;
TriMeshDesc.triangles.stride = 3 * sizeof(physx::PxU16);
TriMeshDesc.triangles.data = tris;
TriMeshDesc.flags = physx::PxMeshFlag::e16_BIT_INDICES;// | physx::PxMeshFlag::eFLIPNORMALS;
PxToolkit::MemoryOutputStream writeBuffer;
PxCooking* pCooking = pPhysX->GetCooking();
if( pCooking && TriMeshDesc.isValid() )
if( pCooking->cookTriangleMesh( TriMeshDesc, writeBuffer ) )
{
PxToolkit::MemoryInputData readBuffer( writeBuffer.getData(), writeBuffer.getSize() );
m_pTriangleMesh = pPhysX->GetPhysics()->createTriangleMesh( readBuffer );
bResult = true;
}
delete[] verts;
delete[] tris;
}
return bResult;
}
virtual bool CookTriMesh(FName Format, int32 RuntimeCookFlags, const TArray<FVector>& SrcVertices, const TArray<FTriIndices>& SrcIndices, const TArray<uint16>& SrcMaterialIndices, const bool FlipNormals, TArray<uint8>& OutBuffer, bool bDeformableMesh = false) const override
{
#if WITH_PHYSX
PxPlatform::Enum PhysXFormat = PxPlatform::ePC;
bool bIsPhysXFormatValid = GetPhysXFormat(Format, PhysXFormat);
check(bIsPhysXFormatValid);
PxTriangleMeshDesc PTriMeshDesc;
PTriMeshDesc.points.data = SrcVertices.GetData();
PTriMeshDesc.points.count = SrcVertices.Num();
PTriMeshDesc.points.stride = sizeof(FVector);
PTriMeshDesc.triangles.data = SrcIndices.GetData();
PTriMeshDesc.triangles.count = SrcIndices.Num();
PTriMeshDesc.triangles.stride = sizeof(FTriIndices);
PTriMeshDesc.materialIndices.data = SrcMaterialIndices.GetData();
PTriMeshDesc.materialIndices.stride = sizeof(PxMaterialTableIndex);
PTriMeshDesc.flags = FlipNormals ? PxMeshFlag::eFLIPNORMALS : (PxMeshFlags)0;
// Set up cooking
const PxCookingParams& Params = PhysXCooking->getParams();
PxCookingParams NewParams = Params;
NewParams.targetPlatform = PhysXFormat;
PxMeshPreprocessingFlags OldCookingFlags = NewParams.meshPreprocessParams;
if (RuntimeCookFlags & ERuntimePhysxCookOptimizationFlags::SuppressFaceRemapTable)
{
NewParams.suppressTriangleMeshRemapTable = true;
}
if (bDeformableMesh)
{
// In the case of a deformable mesh, we have to change the cook params
NewParams.meshPreprocessParams = PxMeshPreprocessingFlag::eDISABLE_CLEAN_MESH;
}
PhysXCooking->setParams(NewParams);
// Cook TriMesh Data
FPhysXOutputStream Buffer(&OutBuffer);
bool Result = PhysXCooking->cookTriangleMesh(PTriMeshDesc, Buffer);
if (bDeformableMesh) //restore old params
{
NewParams.meshPreprocessParams = OldCookingFlags;
PhysXCooking->setParams(NewParams);
}
return Result;
#else
return false;
#endif // WITH_PHYSX
}
void ConvertFbxFile(string inFilename, string outFilename, vector<AnimClip>& animClips, CollisionGeneration generateCollision)
{
Mesh mesh;
{
//Get mesh from FileReader
FbxFileReader fbxFile(inFilename);
mesh = fbxFile.GetMesh();
std::cout << "\nProcessing FBX file " << inFilename << "...\n\n";
//Extract vertex attributes and skeleton
mesh.ExtractData();
std::cout << "Done.\nOptimizing vertex attributes... ";
//Remove duplicates and use indirect arrays
mesh.Optimize();
std::cout << "Done.\nExtracting bone transforms... ";
//Get bone transforms
for(auto& animClip : animClips)
for(auto& transformAtTime : animClip.TransformsAtTimeStamps)
transformAtTime.second = mesh.GetBoneTransforms(transformAtTime.first);
}
std::cout << "Done.\nChecking if vertices are linked to more than 4 bones... ";
//Make sure none of the vertices is skinned to more than 4 bones
for(auto& elem : mesh.BlendInformation.data)
while(elem.BlendIndices.size() > 4)
{
elem.BlendIndices.pop_back();
elem.BlendWeights.pop_back();
}
std::cout << "Done.\nBuilding vertex- and indexbuffers... ";
// Construct vertexbuffer/indexBuffer
vector<Vertex> vertexBuffer;
vector<unsigned int> indexBuffer;
for(unsigned int i=0; i < mesh.Positions.indices.size(); ++i){
Vertex newVert;
newVert.iPosition = mesh.Positions.indices[i];
newVert.iTexCoord = mesh.TexCoords.indices.empty() ? 0 : mesh.TexCoords.indices[i];
newVert.iNormal = mesh.Normals.indices.empty() ? 0 : mesh.Normals.indices[i];
newVert.iTangent = mesh.Tangents.indices.empty() ? 0 : mesh.Tangents.indices[i];
newVert.iBinormal = mesh.Binormals.indices.empty() ? 0 : mesh.Binormals.indices[i];
newVert.iVertexColor = mesh.Colors.indices.empty() ? 0 : mesh.Colors.indices[i];
newVert.iAnimData = mesh.BlendInformation.indices.empty() ? 0 : mesh.BlendInformation.indices[i];
auto it = find(vertexBuffer.begin(), vertexBuffer.end(), newVert);
if(it==vertexBuffer.end()){
vertexBuffer.push_back(newVert);
it = vertexBuffer.end() - 1;
}
indexBuffer.push_back(it-vertexBuffer.begin());
}
std::cout << "Done.\nWriting mesh data... ";
//Write a binary file containing all of the mesh & skeleton data
unsigned int version=1, nrOfUVChannels=mesh.Normals.data.empty() ?0:1, vertexFormat=0;
//Build vertex format
vertexFormat |= mesh.Normals.data.empty() ? 0 : 1 << 0;
vertexFormat |= mesh.Tangents.data.empty() ? 0 : 1 << 1;
vertexFormat |= mesh.Binormals.data.empty() ? 0 : 1 << 2;
vertexFormat |= mesh.Colors.data.empty() ? 0 : 1 << 3;
vertexFormat |= mesh.BlendInformation.data.empty() ? 0 : 1 << 4;
//Create an output file
BinaryWriter oFile(outFilename + ".ttmesh");
oFile.Write<unsigned short>(version); //version number
oFile.Write<unsigned char>(vertexFormat); // vertex format
oFile.Write<unsigned char>(nrOfUVChannels); // nr of texcoord channels
oFile.Write<unsigned int>(mesh.Positions.data.size()); // nr of positions
// nr of texcoords
if(nrOfUVChannels > 0)
oFile.Write<unsigned int>(mesh.TexCoords.data.size());
// nr of normals
if(vertexFormat & 1 << 0)
oFile.Write<unsigned int>(mesh.Normals.data.size());
// nr of tangents
if(vertexFormat & 1 << 1)
oFile.Write<unsigned int>(mesh.Tangents.data.size());
// nr of binormals
if(vertexFormat & 1 << 2)
oFile.Write<unsigned int>(mesh.Binormals.data.size());
// nr of vertex colors
if(vertexFormat & 1 << 3)
oFile.Write<unsigned int>(mesh.Colors.data.size());
//nr of blendweights/-indices
if(vertexFormat & 1 << 4)
oFile.Write<unsigned int>(mesh.BlendInformation.data.size());
oFile.Write<unsigned int>(vertexBuffer.size()); // nr of vertices
oFile.Write<unsigned int>(indexBuffer.size()); // nr of indices
for(auto& elem : mesh.Positions.data) //positions
oFile.Write<FbxVector4>(elem);
for(auto& elem : mesh.TexCoords.data) //texCoords
oFile.Write<FbxVector2>(FbxVector2(elem.mData[0],1-elem.mData[1]));
for(auto& elem : mesh.Normals.data) //normals
oFile.Write<FbxVector4>(elem);
for(auto& elem : mesh.Tangents.data) //tangents
oFile.Write<FbxVector4>(elem);
for(auto& elem : mesh.Binormals.data) //binormals
oFile.Write<FbxVector4>(elem);
for(auto& elem : mesh.Colors.data) //vertex colors
oFile.Write<FbxColor>(elem);
for(auto& elem : mesh.BlendInformation.data){
//blend indices
oFile.Write<unsigned int>(elem.BlendIndices.size() );
for(auto index : elem.BlendIndices)
oFile.Write<unsigned int>(index);
//blend weights
for(auto weight : elem.BlendWeights)
oFile.Write<float>(static_cast<float>(weight) );
}
//Vertex buffer
for(auto& vertex : vertexBuffer){
oFile.Write<unsigned int>(vertex.iPosition);
if(nrOfUVChannels > 0)
oFile.Write<unsigned int>(vertex.iTexCoord);
if(vertexFormat & 1 << 0)
oFile.Write<unsigned int>(vertex.iNormal);
if(vertexFormat & 1 << 1)
oFile.Write<unsigned int>(vertex.iTangent);
if(vertexFormat & 1 << 2)
oFile.Write<unsigned int>(vertex.iBinormal);
if(vertexFormat & 1 << 3)
oFile.Write<unsigned int>(vertex.iVertexColor);
if(vertexFormat & 1 << 4)
oFile.Write<unsigned int>(vertex.iAnimData);
}
//Index buffer
for(auto index : indexBuffer)
oFile.Write<unsigned int>(index);
std::cout << "Done.\nWriting skeleton data... ";
//Bones (#, names, bindposes)
oFile.Write<unsigned int>( mesh.Skeleton.size() );
for(auto& bone : mesh.Skeleton){
oFile.Write<std::string>(bone.Name);
oFile.Write<FbxAMatrix>(bone.BindPose);
}
std::cout << "Done.\nWriting bone animations... ";
//animClips (#, name, fps, nrOfKeys, keyTime0, boneTransforms0, keyTime1, boneTransforms1...)
oFile.Write<unsigned int>( animClips.size() );
for(auto& animClip : animClips){
oFile.Write<std::string>(animClip.Name);
oFile.Write<float>(animClip.FramesPerSecond);
oFile.Write<unsigned int>( animClip.TransformsAtTimeStamps.size() );
for(auto& animKey : animClip.TransformsAtTimeStamps){
oFile.Write<float>(static_cast<float>(animKey.first) );
for(auto& boneTransform : animKey.second)
oFile.Write<FbxAMatrix>(boneTransform);
}
}
//Check if we need to generate a collision mesh
if(generateCollision == CollisionGeneration::None)
{
std::cout << "Done.\n\nOperation succeeded!\n\n";
return;
}
std::cout << "Done.\nWriting PhysX data... ";
//Initialize cooker
PxCookingParams params{ PxTolerancesScale() };
PxCooking* pCooker = PxCreateCooking(PX_PHYSICS_VERSION, PxGetFoundation(), params);
//Build a vertex buffer for PhysX (containing only vertex positions), also copy index buffer, casting to PxU32
unsigned int nrOfVerts = mesh.Positions.data.size();
unsigned int nrOfIndices = mesh.Positions.indices.size();
PxVec3* pVertices = new PxVec3[nrOfVerts];
PxU32* pIndices = new PxU32[nrOfIndices];
for(unsigned int i=0; i<nrOfVerts; ++i){
auto pos = mesh.Positions.data[i];
pVertices[i] = PxVec3( static_cast<PxReal>(pos.mData[0]), static_cast<PxReal>(pos.mData[1]), static_cast<PxReal>(pos.mData[2]) );
}
for(unsigned int i=0; i<nrOfIndices; ++i)
pIndices[i] = static_cast<PxU32>(mesh.Positions.indices[i]);
PxTriangleMeshDesc triMeshDesc;
PxConvexMeshDesc convexMeshDesc;
//Build physical model
switch(generateCollision){
case CollisionGeneration::Concave:
//Fill desc
triMeshDesc.points.count = nrOfVerts;
triMeshDesc.triangles.count = nrOfIndices / 3;
triMeshDesc.points.stride = sizeof(PxVec3);
triMeshDesc.triangles.stride = 3 * sizeof(PxU32);
triMeshDesc.points.data = pVertices;
triMeshDesc.triangles.data = pIndices;
//Cook
pCooker->cookTriangleMesh(triMeshDesc, UserStream((outFilename + ".ttcol").c_str(), false));
break;
case CollisionGeneration::Convex:
//Fill desc
convexMeshDesc.points.count = nrOfVerts;
convexMeshDesc.triangles.count = nrOfIndices / 3;
convexMeshDesc.points.stride = sizeof(PxVec3);
convexMeshDesc.triangles.stride = 3*sizeof(PxU32);
convexMeshDesc.points.data = pVertices;
convexMeshDesc.triangles.data = pIndices;
convexMeshDesc.flags.set(PxConvexFlag::Enum::eCOMPUTE_CONVEX);
//Cook
pCooker->cookConvexMesh(convexMeshDesc, UserStream( (outFilename + ".ttcol").c_str(), false));
break;
};
//Stop cooking
pCooker->release();
std::cout << "Done.\n\nOperation succeeded!\n\n";
}
/**
* Attempts to cook a triangle or convex mesh from the provided mesh data. Will log a warning and return false if it is
* unable to cook the mesh. If the method returns true the resulting convex mesh will be output in the @p data buffer,
* and its size in @p size. The data buffer will be allocated used the generic allocator and is up to the caller to
* free it.
*/
bool cookMesh(const SPtr<MeshData>& meshData, PhysicsMeshType type, UINT8** data, UINT32& size)
{
if (meshData == nullptr)
return false;
PxCooking* cooking = gPhysX().getCooking();
if (cooking == nullptr)
{
LOGWRN("Attempting to cook a physics mesh but cooking is not enabled globally.");
return false;
}
SPtr<VertexDataDesc> vertexDesc = meshData->getVertexDesc();
if (!vertexDesc->hasElement(VES_POSITION))
{
LOGWRN("Provided PhysicsMesh mesh data has no vertex positions.");
return false;
}
if (type == PhysicsMeshType::Convex)
{
if(!cookConvex(cooking, meshData, data, size))
{
LOGWRN("Failed cooking a convex mesh. Perpahs it is too complex? Maximum number of convex vertices is 256.");
return false;
}
}
else
{
PxTriangleMeshDesc meshDesc;
meshDesc.points.count = meshData->getNumVertices();
meshDesc.points.stride = vertexDesc->getVertexStride();
meshDesc.points.data = meshData->getElementData(VES_POSITION);
meshDesc.triangles.count = meshData->getNumIndices() / 3;
meshDesc.flags |= PxMeshFlag::eFLIPNORMALS;
IndexType indexType = meshData->getIndexType();
if (indexType == IT_32BIT)
{
meshDesc.triangles.stride = 3 * sizeof(PxU32);
meshDesc.triangles.data = meshData->getIndices32();
}
else
{
meshDesc.triangles.stride = 3 * sizeof(PxU16);
meshDesc.triangles.data = meshData->getIndices16();
meshDesc.flags |= PxMeshFlag::e16_BIT_INDICES;
}
PxDefaultMemoryOutputStream output;
if (!cooking->cookTriangleMesh(meshDesc, output))
return false;
size = output.getSize();
*data = (UINT8*)bs_alloc(size);
memcpy(*data, output.getData(), size);
}
return true;
}