FbxVector4 FBXScene::GetTangent(FbxMesh* pFBXMesh, int nLayerIndex, int nPolygonIndex, int nPolygonVertexIndex, int nVertexIndex)
{
FbxVector4 vTangent(0,0,0,0);
int nLayerCount = pFBXMesh->GetLayerCount();
if( nLayerIndex < nLayerCount )//for( int i = 0; i < nLayerCount; ++i )
{
FbxLayer* pFBXLayer = pFBXMesh->GetLayer(nLayerIndex);
if( pFBXLayer )
{
FbxLayerElementTangent* pTangents = pFBXLayer->GetTangents();
if( pTangents )
{
const FbxLayerElementArrayTemplate<FbxVector4>& pTangentArray = pTangents->GetDirectArray();
if( nVertexIndex < pTangentArray.GetCount() )
{
vTangent = pTangentArray.GetAt(nVertexIndex);
vTangent.Normalize();
}
}
}
}
return vTangent;
}
void Model::processMeshTextCoords(FbxMesh *mesh, Vertex *verts, int numVerts)
{
int matCount = mesh->GetElementMaterialCount();
FbxLayerElementMaterial *matElem = NULL;
if (matCount) //only supporting 1 material layer max
matElem = mesh->GetElementMaterial(0);
int polCount = mesh->GetPolygonCount();
for (int polInd = 0; polInd < polCount; polInd++)
{
int textureId = 0;
if (matElem)
{
textureId = matElem->GetIndexArray().GetAt(polInd);
}
for (unsigned polVert = 0; polVert < 3; polVert++)
{
int cornerIndex = mesh->GetPolygonVertex(polInd, polVert);
FbxVector2 UV = FbxVector2(0, 0);
FbxLayer *layer = mesh->GetLayer(0);
FbxLayerElementUV *layerUV = layer->GetUVs();
FbxLayerElementTexture *layerTexture = layer->GetTextures(FbxLayerElement::eTextureDiffuse);
if (layerUV)
{
int UVindex = 0;
switch (layerUV->GetMappingMode())
{
case FbxLayerElement::eByControlPoint:
UVindex = cornerIndex;
break;
case FbxLayerElement::eByPolygonVertex:
UVindex = mesh->GetTextureUVIndex(polInd, polVert, FbxLayerElement::eTextureDiffuse);
break;
case FbxLayerElement::eByPolygon:
UVindex = polInd;
break;
}
UV = layerUV->GetDirectArray().GetAt(UVindex);
verts[cornerIndex].color.x = textureId;
verts[cornerIndex].texture.x = UV[0];
verts[cornerIndex].texture.y = 1.f - UV[1];
}
}
}
}
FbxVector4 FBXScene::GetNormal(FbxMesh* pFBXMesh, int nLayerIndex, int nPolygonIndex, int nPolygonVertexIndex, int nVertexIndex)
{
FbxVector4 vNormal(0, 0, 0, 0);
int nLayerCount = pFBXMesh->GetLayerCount();
if( nLayerIndex < nLayerCount )//for( int i = 0; i < nLayerCount; ++i )
{
FbxLayer* pFBXLayer = pFBXMesh->GetLayer(nLayerIndex);
if( pFBXLayer )
{
FbxLayerElementNormal* pNormals = pFBXLayer->GetNormals();
if( pNormals )
{
int nIdx = 0;
if( pNormals->GetReferenceMode( ) == FbxLayerElement::EReferenceMode::eDirect )
{
nIdx = nVertexIndex;
}
if( pNormals->GetReferenceMode( ) == FbxLayerElement::EReferenceMode::eIndexToDirect )
{
nIdx = pNormals->GetIndexArray( ).GetAt( nVertexIndex );
}
const FbxLayerElementArrayTemplate<FbxVector4>& pNormalArray = pNormals->GetDirectArray();
if( nIdx < pNormalArray.GetCount() )
{
vNormal = pNormalArray.GetAt(nIdx);
vNormal.Normalize();
}
}
}
}
return vNormal;
}
BTHFBX_VEC2 FBXScene::GetTexCoord(FbxMesh* pFBXMesh, int nLayerIndex, int nPolygonIndex, int nPolygonVertexIndex, int nVertexIndex)
{
int nLayerCount = pFBXMesh->GetLayerCount();
if( nLayerIndex < nLayerCount )//for( int i = 0; i < nLayerCount; ++i )
{
FbxLayer* pFBXLayer = pFBXMesh->GetLayer(nLayerIndex);
if( pFBXLayer )
{
FbxLayerElementUV* pUVs = pFBXLayer->GetUVs(FbxLayerElement::EType::eTextureDiffuse);
if( pUVs )
{
FbxLayerElement::EMappingMode mappingMode = pUVs->GetMappingMode();
FbxLayerElement::EReferenceMode referenceMode = pUVs->GetReferenceMode();
const FbxLayerElementArrayTemplate<FbxVector2>& pUVArray = pUVs->GetDirectArray();
const FbxLayerElementArrayTemplate<int>& pUVIndexArray = pUVs->GetIndexArray();
switch(mappingMode)
{
case FbxLayerElement::eByControlPoint:
{
int nMappingIndex = nVertexIndex;
switch(referenceMode)
{
case FbxLayerElement::eDirect:
if( nMappingIndex < pUVArray.GetCount() )
{
return FBXTexCoordToD3DTexCoord( KFbxVector2ToBTHFBX_VEC2( pUVArray.GetAt(nMappingIndex) ) );
}
break;
case FbxLayerElement::eIndexToDirect:
if( nMappingIndex < pUVIndexArray.GetCount() )
{
int nIndex = pUVIndexArray.GetAt(nMappingIndex);
if( nIndex < pUVArray.GetCount() )
{
return FBXTexCoordToD3DTexCoord( KFbxVector2ToBTHFBX_VEC2( pUVArray.GetAt(nIndex) ) );
}
}
break;
};
}
break;
case FbxLayerElement::eByPolygonVertex:
{
int nMappingIndex = pFBXMesh->GetTextureUVIndex(nPolygonIndex, nPolygonVertexIndex, FbxLayerElement::eTextureDiffuse);
switch(referenceMode)
{
case FbxLayerElement::EReferenceMode::eDirect:
case FbxLayerElement::EReferenceMode::eIndexToDirect: //I have no idea why the index array is not used in this case.
if( nMappingIndex < pUVArray.GetCount() )
{
return FBXTexCoordToD3DTexCoord( KFbxVector2ToBTHFBX_VEC2( pUVArray.GetAt(nMappingIndex) ) );
}
break;
};
}
break;
};
}
}
}
return BTHFBX_VEC2();
}
/**
* Adds an Fbx Mesh to the FBX scene based on the data in the given FStaticLODModel
*/
FbxNode* FFbxExporter::CreateMesh(const USkeletalMesh* SkelMesh, const TCHAR* MeshName)
{
const FSkeletalMeshResource* SkelMeshResource = SkelMesh->GetImportedResource();
const FStaticLODModel& SourceModel = SkelMeshResource->LODModels[0];
const int32 VertexCount = SourceModel.NumVertices;
// Verify the integrity of the mesh.
if (VertexCount == 0) return NULL;
// Copy all the vertex data from the various chunks to a single buffer.
// Makes the rest of the code in this function cleaner and easier to maintain.
TArray<FSoftSkinVertex> Vertices;
SourceModel.GetVertices(Vertices);
if (Vertices.Num() != VertexCount) return NULL;
FbxMesh* Mesh = FbxMesh::Create(Scene, TCHAR_TO_UTF8(MeshName));
// Create and fill in the vertex position data source.
Mesh->InitControlPoints(VertexCount);
FbxVector4* ControlPoints = Mesh->GetControlPoints();
for (int32 VertIndex = 0; VertIndex < VertexCount; ++VertIndex)
{
FVector Position = Vertices[VertIndex].Position;
ControlPoints[VertIndex] = Converter.ConvertToFbxPos(Position);
}
// Create Layer 0 to hold the normals
FbxLayer* LayerZero = Mesh->GetLayer(0);
if (LayerZero == NULL)
{
Mesh->CreateLayer();
LayerZero = Mesh->GetLayer(0);
}
// Create and fill in the per-face-vertex normal data source.
// We extract the Z-tangent and drop the X/Y-tangents which are also stored in the render mesh.
FbxLayerElementNormal* LayerElementNormal= FbxLayerElementNormal::Create(Mesh, "");
LayerElementNormal->SetMappingMode(FbxLayerElement::eByControlPoint);
// Set the normal values for every control point.
LayerElementNormal->SetReferenceMode(FbxLayerElement::eDirect);
for (int32 VertIndex = 0; VertIndex < VertexCount; ++VertIndex)
{
FVector Normal = Vertices[VertIndex].TangentZ;
FbxVector4 FbxNormal = Converter.ConvertToFbxPos(Normal);
LayerElementNormal->GetDirectArray().Add(FbxNormal);
}
LayerZero->SetNormals(LayerElementNormal);
// Create and fill in the per-face-vertex texture coordinate data source(s).
// Create UV for Diffuse channel.
const int32 TexCoordSourceCount = SourceModel.NumTexCoords;
TCHAR UVChannelName[32];
for (int32 TexCoordSourceIndex = 0; TexCoordSourceIndex < TexCoordSourceCount; ++TexCoordSourceIndex)
{
FbxLayer* Layer = Mesh->GetLayer(TexCoordSourceIndex);
if (Layer == NULL)
{
Mesh->CreateLayer();
Layer = Mesh->GetLayer(TexCoordSourceIndex);
}
if (TexCoordSourceIndex == 1)
{
FCString::Sprintf(UVChannelName, TEXT("LightMapUV"));
}
else
{
FCString::Sprintf(UVChannelName, TEXT("DiffuseUV"));
}
FbxLayerElementUV* UVDiffuseLayer = FbxLayerElementUV::Create(Mesh, TCHAR_TO_UTF8(UVChannelName));
UVDiffuseLayer->SetMappingMode(FbxLayerElement::eByControlPoint);
UVDiffuseLayer->SetReferenceMode(FbxLayerElement::eDirect);
// Create the texture coordinate data source.
for (int32 TexCoordIndex = 0; TexCoordIndex < VertexCount; ++TexCoordIndex)
{
const FVector2D& TexCoord = Vertices[TexCoordIndex].UVs[TexCoordSourceIndex];
UVDiffuseLayer->GetDirectArray().Add(FbxVector2(TexCoord.X, -TexCoord.Y + 1.0));
}
Layer->SetUVs(UVDiffuseLayer, FbxLayerElement::eTextureDiffuse);
}
FbxLayerElementMaterial* MatLayer = FbxLayerElementMaterial::Create(Mesh, "");
MatLayer->SetMappingMode(FbxLayerElement::eByPolygon);
MatLayer->SetReferenceMode(FbxLayerElement::eIndexToDirect);
LayerZero->SetMaterials(MatLayer);
// Create the per-material polygons sets.
TArray<uint32> Indices;
SourceModel.MultiSizeIndexContainer.GetIndexBuffer(Indices);
int32 SectionCount = SourceModel.Sections.Num();
for (int32 SectionIndex = 0; SectionIndex < SectionCount; ++SectionIndex)
{
const FSkelMeshSection& Section = SourceModel.Sections[SectionIndex];
int32 MatIndex = Section.MaterialIndex;
// Static meshes contain one triangle list per element.
int32 TriangleCount = Section.NumTriangles;
// Copy over the index buffer into the FBX polygons set.
for (int32 TriangleIndex = 0; TriangleIndex < TriangleCount; ++TriangleIndex)
{
Mesh->BeginPolygon(MatIndex);
for (int32 PointIndex = 0; PointIndex < 3; PointIndex++)
{
Mesh->AddPolygon(Indices[Section.BaseIndex + ((TriangleIndex * 3) + PointIndex)]);
}
Mesh->EndPolygon();
}
}
// Create and fill in the vertex color data source.
FbxLayerElementVertexColor* VertexColor = FbxLayerElementVertexColor::Create(Mesh, "");
VertexColor->SetMappingMode(FbxLayerElement::eByControlPoint);
VertexColor->SetReferenceMode(FbxLayerElement::eDirect);
FbxLayerElementArrayTemplate<FbxColor>& VertexColorArray = VertexColor->GetDirectArray();
LayerZero->SetVertexColors(VertexColor);
for (int32 VertIndex = 0; VertIndex < VertexCount; ++VertIndex)
{
FLinearColor VertColor = Vertices[VertIndex].Color.ReinterpretAsLinear();
VertexColorArray.Add( FbxColor(VertColor.R, VertColor.G, VertColor.B, VertColor.A ));
}
FbxNode* MeshNode = FbxNode::Create(Scene, TCHAR_TO_UTF8(MeshName));
MeshNode->SetNodeAttribute(Mesh);
// Add the materials for the mesh
int32 MaterialCount = SkelMesh->Materials.Num();
for(int32 MaterialIndex = 0; MaterialIndex < MaterialCount; ++MaterialIndex)
{
UMaterialInterface* MatInterface = SkelMesh->Materials[MaterialIndex].MaterialInterface;
FbxSurfaceMaterial* FbxMaterial = NULL;
if(MatInterface && !FbxMaterials.Find(MatInterface))
{
FbxMaterial = ExportMaterial(MatInterface);
}
else
{
// Note: The vertex data relies on there being a set number of Materials.
// If you try to add the same material again it will not be added, so create a
// default material with a unique name to ensure the proper number of materials
TCHAR NewMaterialName[MAX_SPRINTF]=TEXT("");
FCString::Sprintf( NewMaterialName, TEXT("Fbx Default Material %i"), MaterialIndex );
FbxMaterial = FbxSurfaceLambert::Create(Scene, TCHAR_TO_UTF8(NewMaterialName));
((FbxSurfaceLambert*)FbxMaterial)->Diffuse.Set(FbxDouble3(0.72, 0.72, 0.72));
}
MeshNode->AddMaterial(FbxMaterial);
}
int32 SavedMaterialCount = MeshNode->GetMaterialCount();
check(SavedMaterialCount == MaterialCount);
return MeshNode;
}
/**
* メッシュ情報を読み込む
*
* @param mesh メッシュ情報
*/
void FbxFileLoader::load_mesh( FbxMesh* mesh )
{
if ( ! mesh )
{
return;
}
if ( ! get_model()->get_mesh() )
{
get_model()->set_mesh( create_mesh() );
}
VertexIndexMap vertex_index_map;
VertexList vertex_list;
Mesh::PositionList position_list;
Mesh::VertexWeightList vertex_weight_list;
// load_mesh_vertex()
for ( int n = 0; n < mesh->GetControlPointsCount(); n++ )
{
FbxVector4 v = mesh->GetControlPointAt( n );
position_list.push_back(
Mesh::Position(
static_cast< float >( v[ 0 ] ),
static_cast< float >( v[ 1 ] ),
static_cast< float >( v[ 2 ] ) ) );
}
// load_mesh_vertex_weight()
{
int skin_count = mesh->GetDeformerCount( FbxDeformer::eSkin );
if ( skin_count > 0 )
{
assert( skin_count == 1 );
vertex_weight_list.resize( position_list.size() );
FbxSkin* skin = FbxCast< FbxSkin >( mesh->GetDeformer( 0, FbxDeformer::eSkin ) );
load_mesh_vertex_weight( skin, vertex_weight_list );
}
}
FbxLayerElementSmoothing* smoothing = 0;
// load_mesh_smoothing_info()
{
FbxLayer* layer = mesh->GetLayer( 0 );
smoothing = layer->GetSmoothing();
}
if ( ! smoothing )
{
COMMON_THROW_EXCEPTION_MESSAGE( "this FBX format is not supported. ( no smoothing info )" );
}
// load_mesh_plygon()
FbxLayerElementArrayTemplate< int >* material_indices;
mesh->GetMaterialIndices( & material_indices );
for ( int n = 0; n < mesh->GetPolygonCount(); n++ )
{
Mesh::VertexGroup* vertex_group = get_model()->get_mesh()->get_vertex_group_at( material_indices->GetAt( n ) );
bool is_smooth = smoothing->GetDirectArray().GetAt( n ) != 0;
FbxVector4 polygon_normal( 0.f, 0.f, 0.f );
if ( ! is_smooth )
{
// ポリゴンの法線を計算する
Mesh::Position p1( position_list.at( mesh->GetPolygonVertex( n, 0 ) ) );
Mesh::Position p2( position_list.at( mesh->GetPolygonVertex( n, 1 ) ) );
Mesh::Position p3( position_list.at( mesh->GetPolygonVertex( n, 2 ) ) );
FbxVector4 a = FbxVector4( p1.x(), p1.y(), p1.z() );
FbxVector4 b = FbxVector4( p2.x(), p2.y(), p2.z() );
FbxVector4 c = FbxVector4( p3.x(), p3.y(), p3.z() );
FbxVector4 ab( b - a );
FbxVector4 bc( c - b );
polygon_normal = ab.CrossProduct( bc );
polygon_normal.Normalize();
}
for ( int m = 0; m < mesh->GetPolygonSize( n ); m++ )
{
int position_index = mesh->GetPolygonVertex( n, m );
Mesh::Vertex v;
v.Position = Mesh::Position( position_list.at( position_index ) );
FbxVector2 uv_vector;
bool unmapped;
if ( mesh->GetPolygonVertexUV( n, m, "UVMap", uv_vector, unmapped) )
{
v.TexCoord = Mesh::TexCoord(
static_cast< float >( uv_vector[ 0 ] ),
1.f - static_cast< float >( uv_vector[ 1 ] ) );
}
if ( is_smooth )
{
FbxVector4 normal_vector;
// 頂点の法線
if ( mesh->GetPolygonVertexNormal( n, m, normal_vector ) )
{
v.Normal = Mesh::Normal(
static_cast< float >( normal_vector[ 0 ] ),
static_cast< float >( normal_vector[ 1 ] ),
static_cast< float >( normal_vector[ 2 ] ) );
}
}
else
{
// ポリゴンの法線
v.Normal = Mesh::Normal(
static_cast< float >( polygon_normal[ 0 ] ),
static_cast< float >( polygon_normal[ 1 ] ),
static_cast< float >( polygon_normal[ 2 ] ) );
}
// 頂点の一覧に追加
{
VertexIndexMap::iterator i = vertex_index_map.find( v );
if ( i != vertex_index_map.end() )
{
vertex_group->add_index( i->second );
}
else
{
Mesh::Index vertex_index = static_cast< Mesh::Index >( get_model()->get_mesh()->get_vertex_count() );
get_model()->get_mesh()->add_vertex( v );
if ( ! vertex_weight_list.empty() )
{
get_model()->get_mesh()->add_vertex_weight( vertex_weight_list.at( position_index ) );
}
vertex_group->add_index( vertex_index );
vertex_index_map[ v ] = vertex_index;
}
}
}
}
}
void FbxLoader::LoadAttribute(FbxNodeAttribute* pAttribute)
{
if (pAttribute->GetAttributeType() == FbxNodeAttribute::eMesh)
{
FbxMesh* pMesh = (FbxMesh*)pAttribute;
FbxVector4* IControlPoints = pMesh->GetControlPoints();
m_vertexCount = pMesh->GetControlPointsCount();
m_vertexBuffer = new float[m_vertexCount * 4];
for (int i = 0; i < m_vertexCount * 4; i+=4)
{
m_vertexBuffer[i] = (float)IControlPoints[i / 4].mData[0];
m_vertexBuffer[i + 1] = (float)IControlPoints[i / 4].mData[1];
m_vertexBuffer[i + 2] = (float)IControlPoints[i / 4].mData[2];
m_vertexBuffer[i + 3] = 1.0f;// IControlPoints[i / 4].mData[3];
}
int* pIndices = pMesh->GetPolygonVertices();
m_indexCount = pMesh->GetPolygonVertexCount();
m_indexBuffer = new uint32[m_indexCount];
for (int i = 0; i < m_indexCount; ++i)
{
m_indexBuffer[i] = pIndices[i];
}
FbxLayer* pLayer = pMesh->GetLayer(0);
if (pLayer != NULL)
{
FbxLayerElementNormal* pNormal = pLayer->GetNormals();
m_normalCount = pNormal->mDirectArray->GetCount();
m_normalBuffer = new float[m_normalCount * 3];
for (int i = 0; i < m_normalCount * 3; i+=3)
{
m_normalBuffer[i] = (float)(*pNormal->mDirectArray)[i / 3][0];
m_normalBuffer[i + 1] = (float)(*pNormal->mDirectArray)[i / 3][1];
m_normalBuffer[i + 2] = (float)(*pNormal->mDirectArray)[i / 3][2];
//m_normalBuffer[i + 3] = (*pNormal->mDirectArray)[i / 4][3];
}
FbxLayerElementUV* pUV = pLayer->GetUVs();
if (pUV->GetMappingMode() == FbxLayerElement::eByPolygonVertex)
{
if (pUV->GetReferenceMode() == FbxLayerElement::eIndexToDirect)
{
m_uvCount = pUV->mIndexArray->GetCount();
m_uvBuffer = new float[m_uvCount * 2];
for (int i = 0; i < m_uvCount * 2; i+=2)
{
m_uvBuffer[i] = (float)(*pUV->mDirectArray)[(*pUV->mIndexArray)[i / 2]][0];
m_uvBuffer[i + 1] = (float)(*pUV->mDirectArray)[(*pUV->mIndexArray)[i / 2]][1];
}
}
else
{
m_uvCount = pUV->mDirectArray->GetCount();
m_uvBuffer = new float[m_uvCount * 2];
for (int i = 0; i < m_uvCount * 2; i += 2)
{
m_uvBuffer[i] = (float)(*pUV->mDirectArray)[i / 2][0];
m_uvBuffer[i + 1] = (float)(*pUV->mDirectArray)[i / 2][1];
}
}
}
else
{
if (pUV->GetReferenceMode() == FbxLayerElement::eIndexToDirect)
{
m_uvCount = pUV->mIndexArray->GetCount();
m_uvBuffer = new float[m_uvCount * 2];
for (int i = 0; i < m_uvCount * 2; i+=2)
{
m_uvBuffer[i] = (float)(*pUV->mDirectArray)[(*pUV->mIndexArray)[i / 2]][0];
m_uvBuffer[i + 1] = (float)(*pUV->mDirectArray)[(*pUV->mIndexArray)[i / 2]][1];
}
}
else
{
m_uvCount = pUV->mDirectArray->GetCount();
m_uvBuffer = new float[m_uvCount * 2];
for (int i = 0; i < m_uvCount * 2; i+=2)
{
m_uvBuffer[i] = (float)(*pUV->mDirectArray)[i / 2][0];
m_uvBuffer[i + 1] = (float)(*pUV->mDirectArray)[i / 2][1];
}
}
}
}
}
}
