Material* FBXScene::GetMaterialLinkedWithPolygon(FbxMesh* pFBXMesh, int nLayerIndex, int nPolygonIndex, int nPolygonVertexIndex, int nVertexIndex)
{
if( nLayerIndex < 0 || nLayerIndex > pFBXMesh->GetLayerCount() )
return NULL;
FbxNode* pNode = pFBXMesh->GetNode();
if( !pNode )
return NULL;
FbxLayerElementMaterial* pFBXMaterial = pFBXMesh->GetLayer(nLayerIndex)->GetMaterials();
if( pFBXMaterial )
{
int nMappingIndex = GetMappingIndex( pFBXMaterial->GetMappingMode(), nPolygonIndex, 0, nVertexIndex );
if( nMappingIndex < 0 )
return NULL;
FbxLayerElement::EReferenceMode referenceMode = pFBXMaterial->GetReferenceMode();
if( referenceMode == FbxLayerElement::EReferenceMode::eDirect )
{
if( nMappingIndex < pNode->GetMaterialCount() )
{
return GetMaterial(pNode->GetMaterial(nMappingIndex));
}
}
else if( referenceMode == FbxLayerElement::EReferenceMode::eIndexToDirect )
{
const FbxLayerElementArrayTemplate<int>& pMaterialIndexArray = pFBXMaterial->GetIndexArray();
if( nMappingIndex < pMaterialIndexArray.GetCount() )
{
int nIndex = pMaterialIndexArray.GetAt(nMappingIndex);
if( nIndex < pNode->GetMaterialCount() )
{
return GetMaterial(pNode->GetMaterial(nIndex));
}
}
}
}
return NULL;
}
void ParseMesh( FbxNode* pNode, FbxMesh* pFbxMesh, ExportFrame* pParentFrame, bool bSubDProcess, const CHAR* strSuffix )
{
if( !g_pScene->Settings().bExportMeshes )
return;
if( !pNode || !pFbxMesh )
return;
const CHAR* strName = pFbxMesh->GetName();
if( !strName || strName[0] == '\0' )
strName = pParentFrame->GetName().SafeString();
if( !strSuffix )
{
strSuffix = "";
}
CHAR strDecoratedName[512];
sprintf_s( strDecoratedName, "%s_%s%s", g_pScene->Settings().strMeshNameDecoration, strName, strSuffix );
ExportMesh* pMesh = new ExportMesh( strDecoratedName );
pMesh->SetDCCObject( pFbxMesh );
bool bSmoothMesh = false;
auto Smoothness = pFbxMesh->GetMeshSmoothness();
if( Smoothness != FbxMesh::eHull && g_pScene->Settings().bConvertMeshesToSubD )
{
bSubDProcess = true;
bSmoothMesh = true;
}
ExportLog::LogMsg( 2, "Parsing %s mesh \"%s\", renamed to \"%s\"", bSmoothMesh ? "smooth" : "poly", strName, strDecoratedName );
SkinData skindata;
bool bSkinnedMesh = ParseMeshSkinning( pFbxMesh, &skindata );
if( bSkinnedMesh )
{
DWORD dwBoneCount = skindata.GetBoneCount();
for( DWORD i = 0; i < dwBoneCount; ++i )
{
pMesh->AddInfluence( skindata.InfluenceNodes[i]->GetName() );
}
}
bool bExportColors = g_pScene->Settings().bExportColors;
pMesh->SetVertexColorCount( 0 );
// Vertex normals and tangent spaces
if( !g_pScene->Settings().bExportNormals )
{
pMesh->SetVertexNormalCount( 0 );
}
else if( g_pScene->Settings().bComputeVertexTangentSpace )
{
if( g_pScene->Settings().bExportBinormal )
pMesh->SetVertexNormalCount( 3 );
else
pMesh->SetVertexNormalCount( 2 );
}
else
{
pMesh->SetVertexNormalCount( 1 );
}
DWORD dwLayerCount = pFbxMesh->GetLayerCount();
ExportLog::LogMsg( 4, "%u layers in FBX mesh", dwLayerCount );
if (!dwLayerCount || !pFbxMesh->GetLayer(0)->GetNormals())
{
ExportLog::LogMsg( 4, "Generating normals..." );
pFbxMesh->InitNormals();
#if (FBXSDK_VERSION_MAJOR >= 2015)
pFbxMesh->GenerateNormals();
#else
pFbxMesh->ComputeVertexNormals();
#endif
}
DWORD dwVertexColorCount = 0;
FbxLayerElementVertexColor* pVertexColorSet = nullptr;
DWORD dwUVSetCount = 0;
FbxLayerElementMaterial* pMaterialSet = nullptr;
std::vector<FbxLayerElementUV*> VertexUVSets;
for( DWORD dwLayerIndex = 0; dwLayerIndex < dwLayerCount; ++dwLayerIndex )
{
if( pFbxMesh->GetLayer(dwLayerIndex)->GetVertexColors() && bExportColors )
{
if( dwVertexColorCount == 0 )
{
dwVertexColorCount++;
pVertexColorSet = pFbxMesh->GetLayer(dwLayerIndex)->GetVertexColors();
}
else
{
ExportLog::LogWarning( "Only one vertex color set is allowed; ignoring additional vertex color sets." );
}
}
if( pFbxMesh->GetLayer(dwLayerIndex)->GetUVs() )
{
dwUVSetCount++;
VertexUVSets.push_back( pFbxMesh->GetLayer(dwLayerIndex)->GetUVs() );
}
if( pFbxMesh->GetLayer(dwLayerIndex)->GetMaterials() )
{
if( pMaterialSet )
{
ExportLog::LogWarning( "Multiple material layers detected on mesh %s. Some will be ignored.", pMesh->GetName().SafeString() );
}
pMaterialSet = pFbxMesh->GetLayer(dwLayerIndex)->GetMaterials();
}
}
std::vector<ExportMaterial*> MaterialList;
for( int dwMaterial = 0; dwMaterial < pNode->GetMaterialCount(); ++dwMaterial )
{
auto pMat = pNode->GetMaterial( dwMaterial );
if ( !pMat )
continue;
auto pMaterial = ParseMaterial( pMat );
MaterialList.push_back( pMaterial );
}
ExportLog::LogMsg( 4, "Found %u UV sets", dwUVSetCount );
dwUVSetCount = std::min<DWORD>( dwUVSetCount, g_pScene->Settings().iMaxUVSetCount );
ExportLog::LogMsg( 4, "Using %u UV sets", dwUVSetCount );
pMesh->SetVertexColorCount( dwVertexColorCount );
pMesh->SetVertexUVCount( dwUVSetCount );
// TODO: Does FBX only support 2D texture coordinates?
pMesh->SetVertexUVDimension( 2 );
DWORD dwMeshOptimizationFlags = 0;
if( g_pScene->Settings().bCompressVertexData )
dwMeshOptimizationFlags |= ExportMesh::COMPRESS_VERTEX_DATA;
DWORD dwPolyCount = pFbxMesh->GetPolygonCount();
// Assume that polys are usually quads.
g_MeshTriangleAllocator.SetSizeHint( dwPolyCount * 2 );
DWORD dwVertexCount = pFbxMesh->GetControlPointsCount();
auto pVertexPositions = pFbxMesh->GetControlPoints();
if( bSkinnedMesh )
{
assert( skindata.dwVertexCount == dwVertexCount );
}
ExportLog::LogMsg( 4, "%u vertices, %u polygons", dwVertexCount, dwPolyCount );
DWORD dwNonConformingSubDPolys = 0;
// Compute total transformation
FbxAMatrix vertMatrix;
FbxAMatrix normMatrix;
{
auto trans = pNode->GetGeometricTranslation( FbxNode::eSourcePivot );
auto rot = pNode->GetGeometricRotation( FbxNode::eSourcePivot );
auto scale = pNode->GetGeometricScaling( FbxNode::eSourcePivot );
FbxAMatrix geom;
geom.SetT( trans );
geom.SetR( rot );
geom.SetS( scale );
if ( g_pScene->Settings().bExportAnimations || !g_pScene->Settings().bApplyGlobalTrans )
{
vertMatrix = geom;
}
else
{
auto global = pNode->EvaluateGlobalTransform();
vertMatrix = global * geom;
}
// Calculate the normal transform matrix (inverse-transpose)
normMatrix = vertMatrix;
normMatrix = normMatrix.Inverse();
normMatrix = normMatrix.Transpose();
}
const bool bInvertTexVCoord = g_pScene->Settings().bInvertTexVCoord;
// Loop over polygons.
DWORD basePolyIndex = 0;
for( DWORD dwPolyIndex = 0; dwPolyIndex < dwPolyCount; ++dwPolyIndex )
{
// Triangulate each polygon into one or more triangles.
DWORD dwPolySize = pFbxMesh->GetPolygonSize( dwPolyIndex );
assert( dwPolySize >= 3 );
DWORD dwTriangleCount = dwPolySize - 2;
assert( dwTriangleCount > 0 );
if( dwPolySize > 4 )
{
++dwNonConformingSubDPolys;
}
DWORD dwMaterialIndex = 0;
if( pMaterialSet )
{
switch( pMaterialSet->GetMappingMode() )
{
case FbxLayerElement::eByPolygon:
switch( pMaterialSet->GetReferenceMode() )
{
case FbxLayerElement::eDirect:
dwMaterialIndex = dwPolyIndex;
break;
case FbxLayerElement::eIndex:
case FbxLayerElement::eIndexToDirect:
dwMaterialIndex = pMaterialSet->GetIndexArray().GetAt( dwPolyIndex );
break;
}
}
}
DWORD dwCornerIndices[3];
// Loop over triangles in the polygon.
for( DWORD dwTriangleIndex = 0; dwTriangleIndex < dwTriangleCount; ++dwTriangleIndex )
{
dwCornerIndices[0] = pFbxMesh->GetPolygonVertex( dwPolyIndex, 0 );
dwCornerIndices[1] = pFbxMesh->GetPolygonVertex( dwPolyIndex, dwTriangleIndex + 1 );
dwCornerIndices[2] = pFbxMesh->GetPolygonVertex( dwPolyIndex, dwTriangleIndex + 2 );
//ExportLog::LogMsg( 4, "Poly %d Triangle %d: %d %d %d", dwPolyIndex, dwTriangleIndex, dwCornerIndices[0], dwCornerIndices[1], dwCornerIndices[2] );
FbxVector4 vNormals[3];
ZeroMemory( vNormals, 3 * sizeof(FbxVector4) );
INT iPolyIndex = static_cast<INT>( dwPolyIndex );
INT iVertIndex[3] = { 0, static_cast<INT>( dwTriangleIndex + 1 ), static_cast<INT>( dwTriangleIndex + 2 ) };
pFbxMesh->GetPolygonVertexNormal( iPolyIndex, iVertIndex[0], vNormals[0] );
pFbxMesh->GetPolygonVertexNormal( iPolyIndex, iVertIndex[1], vNormals[1] );
pFbxMesh->GetPolygonVertexNormal( iPolyIndex, iVertIndex[2], vNormals[2] );
// Build the raw triangle.
auto pTriangle = g_MeshTriangleAllocator.GetNewTriangle();
// Store polygon index
pTriangle->PolygonIndex = static_cast<INT>( dwPolyIndex );
// Store material subset index
pTriangle->SubsetIndex = dwMaterialIndex;
for( DWORD dwCornerIndex = 0; dwCornerIndex < 3; ++dwCornerIndex )
{
const DWORD& dwDCCIndex = dwCornerIndices[dwCornerIndex];
// Store DCC vertex index (this helps the mesh reduction/VB generation code)
pTriangle->Vertex[dwCornerIndex].DCCVertexIndex = dwDCCIndex;
// Store vertex position
auto finalPos = vertMatrix.MultT( pVertexPositions[dwDCCIndex] );
pTriangle->Vertex[dwCornerIndex].Position.x = (float)finalPos.mData[0];
pTriangle->Vertex[dwCornerIndex].Position.y = (float)finalPos.mData[1];
pTriangle->Vertex[dwCornerIndex].Position.z = (float)finalPos.mData[2];
// Store vertex normal
auto finalNorm = vNormals[dwCornerIndex];
finalNorm.mData[3] = 0.0;
finalNorm = normMatrix.MultT( finalNorm );
finalNorm.Normalize();
pTriangle->Vertex[dwCornerIndex].Normal.x = (float)finalNorm.mData[0];
pTriangle->Vertex[dwCornerIndex].Normal.y = (float)finalNorm.mData[1];
pTriangle->Vertex[dwCornerIndex].Normal.z = (float)finalNorm.mData[2];
// Store UV sets
for( DWORD dwUVIndex = 0; dwUVIndex < dwUVSetCount; ++dwUVIndex )
{
// Crack apart the FBX dereferencing system for UV coordinates
FbxLayerElementUV* pUVSet = VertexUVSets[dwUVIndex];
FbxVector2 Value( 0, 0 );
switch( pUVSet->GetMappingMode() )
{
case FbxLayerElement::eByControlPoint:
switch (pUVSet->GetReferenceMode())
{
case FbxLayerElement::eDirect:
Value = pUVSet->GetDirectArray().GetAt(dwDCCIndex);
break;
case FbxLayerElement::eIndex:
case FbxLayerElement::eIndexToDirect:
{
int iUVIndex = pUVSet->GetIndexArray().GetAt(dwDCCIndex);
Value = pUVSet->GetDirectArray().GetAt(iUVIndex);
}
break;
}
break;
case FbxLayerElement::eByPolygonVertex:
switch (pUVSet->GetReferenceMode())
{
case FbxLayerElement::eDirect:
Value = pUVSet->GetDirectArray().GetAt( basePolyIndex + iVertIndex[dwCornerIndex] );
break;
case FbxLayerElement::eIndex:
case FbxLayerElement::eIndexToDirect:
{
int iUVIndex = pUVSet->GetIndexArray().GetAt( basePolyIndex + iVertIndex[dwCornerIndex] );
#ifdef _DEBUG
if (!dwUVIndex)
{
// Warning: pFbxMesh->GetTextureUVIndex only works for the first layer of the mesh
int iUVIndex2 = pFbxMesh->GetTextureUVIndex(iPolyIndex, iVertIndex[dwCornerIndex]);
assert(iUVIndex == iUVIndex2);
}
#endif
Value = pUVSet->GetDirectArray().GetAt( iUVIndex );
}
break;
}
break;
}
// Store a single UV set
pTriangle->Vertex[dwCornerIndex].TexCoords[dwUVIndex].x = (float)Value.mData[0];
if( bInvertTexVCoord )
{
pTriangle->Vertex[dwCornerIndex].TexCoords[dwUVIndex].y = 1.0f - (float) Value.mData[1];
}
else
{
pTriangle->Vertex[dwCornerIndex].TexCoords[dwUVIndex].y = (float)Value.mData[1];
}
}
// Store vertex color set
if( dwVertexColorCount > 0 && pVertexColorSet )
{
// Crack apart the FBX dereferencing system for Color coordinates
FbxColor Value( 1, 1, 1, 1 );
switch( pVertexColorSet->GetMappingMode() )
{
case FbxLayerElement::eByControlPoint:
switch( pVertexColorSet->GetReferenceMode() )
{
case FbxLayerElement::eDirect:
Value = pVertexColorSet->GetDirectArray().GetAt( dwDCCIndex );
break;
case FbxLayerElement::eIndex:
case FbxLayerElement::eIndexToDirect:
{
int iColorIndex = pVertexColorSet->GetIndexArray().GetAt(dwDCCIndex);
Value = pVertexColorSet->GetDirectArray().GetAt(iColorIndex);
}
break;
}
break;
case FbxLayerElement::eByPolygonVertex:
switch( pVertexColorSet->GetReferenceMode() )
{
case FbxLayerElement::eDirect:
Value = pVertexColorSet->GetDirectArray().GetAt( basePolyIndex + iVertIndex[dwCornerIndex] );
break;
case FbxLayerElement::eIndex:
case FbxLayerElement::eIndexToDirect:
{
int iColorIndex = pVertexColorSet->GetIndexArray().GetAt( basePolyIndex + iVertIndex[dwCornerIndex] );
Value = pVertexColorSet->GetDirectArray().GetAt(iColorIndex);
}
break;
}
break;
}
// Store a single vertex color set
pTriangle->Vertex[dwCornerIndex].Color.x = (float)Value.mRed;
pTriangle->Vertex[dwCornerIndex].Color.y = (float)Value.mGreen;
pTriangle->Vertex[dwCornerIndex].Color.z = (float)Value.mBlue;
pTriangle->Vertex[dwCornerIndex].Color.w = (float)Value.mAlpha;
}
// Store skin weights
if( bSkinnedMesh )
{
memcpy( &pTriangle->Vertex[dwCornerIndex].BoneIndices, skindata.GetIndices( dwDCCIndex ), sizeof(PackedVector::XMUBYTE4) );
memcpy( &pTriangle->Vertex[dwCornerIndex].BoneWeights, skindata.GetWeights( dwDCCIndex ), sizeof(XMFLOAT4) );
}
}
// Add raw triangle to the mesh.
pMesh->AddRawTriangle( pTriangle );
}
basePolyIndex += dwPolySize;
}
if( bSubDProcess )
{
dwMeshOptimizationFlags |= ExportMesh::FORCE_SUBD_CONVERSION;
}
if ( g_pScene->Settings().bCleanMeshes )
{
dwMeshOptimizationFlags |= ExportMesh::CLEAN_MESHES;
}
if ( g_pScene->Settings().bOptimizeVCache )
{
dwMeshOptimizationFlags |= ExportMesh::CLEAN_MESHES | ExportMesh::VCACHE_OPT;
}
pMesh->Optimize( dwMeshOptimizationFlags );
ExportModel* pModel = new ExportModel( pMesh );
size_t dwMaterialCount = MaterialList.size();
if( !pMesh->GetSubDMesh() )
{
for( size_t dwSubset = 0; dwSubset < dwMaterialCount; ++dwSubset )
{
auto pMaterial = MaterialList[dwSubset];
auto pSubset = pMesh->GetSubset( dwSubset );
CHAR strUniqueSubsetName[100];
sprintf_s( strUniqueSubsetName, "subset%Iu_%s", dwSubset, pMaterial->GetName().SafeString() );
pSubset->SetName( strUniqueSubsetName );
pModel->SetSubsetBinding( pSubset->GetName(), pMaterial );
}
}
else
{
auto pSubDMesh = pMesh->GetSubDMesh();
size_t dwSubsetCount = pSubDMesh->GetSubsetCount();
for( size_t dwSubset = 0; dwSubset < dwSubsetCount; ++dwSubset )
{
auto pSubset = pSubDMesh->GetSubset( dwSubset );
assert( pSubset != nullptr );
assert( pSubset->iOriginalMeshSubset < static_cast<INT>( dwMaterialCount ) );
auto pMaterial = MaterialList[pSubset->iOriginalMeshSubset];
CHAR strUniqueSubsetName[100];
sprintf_s( strUniqueSubsetName, "subset%Iu_%s", dwSubset, pMaterial->GetName().SafeString() );
pSubset->Name = strUniqueSubsetName;
pModel->SetSubsetBinding( pSubset->Name, pMaterial, true );
}
}
if( bSubDProcess && ( dwNonConformingSubDPolys > 0 ) )
{
ExportLog::LogWarning( "Encountered %u polygons with 5 or more sides in mesh \"%s\", which were subdivided into quad and triangle patches. Mesh appearance may have been affected.", dwNonConformingSubDPolys, pMesh->GetName().SafeString() );
}
// update statistics
if( pMesh->GetSubDMesh() )
{
g_pScene->Statistics().SubDMeshesProcessed++;
g_pScene->Statistics().SubDQuadsProcessed += pMesh->GetSubDMesh()->GetQuadPatchCount();
g_pScene->Statistics().SubDTrisProcessed += pMesh->GetSubDMesh()->GetTrianglePatchCount();
}
else
{
g_pScene->Statistics().TrisExported += pMesh->GetIB()->GetIndexCount() / 3;
g_pScene->Statistics().VertsExported += pMesh->GetVB()->GetVertexCount();
g_pScene->Statistics().MeshesExported++;
}
pParentFrame->AddModel( pModel );
g_pScene->AddMesh( pMesh );
}