void TGPUSkinVertexFactory<bExtraBoneInfluencesT>::AddVertexElements(DataType& InData, FVertexDeclarationElementList& OutElements)
{
// position decls
OutElements.Add(AccessStreamComponent(InData.PositionComponent,0));
// tangent basis vector decls
OutElements.Add(AccessStreamComponent(InData.TangentBasisComponents[0],1));
OutElements.Add(AccessStreamComponent(InData.TangentBasisComponents[1],2));
// texture coordinate decls
if(InData.TextureCoordinates.Num())
{
const uint8 BaseTexCoordAttribute = 5;
for(int32 CoordinateIndex = 0;CoordinateIndex < InData.TextureCoordinates.Num();CoordinateIndex++)
{
OutElements.Add(AccessStreamComponent(
InData.TextureCoordinates[CoordinateIndex],
BaseTexCoordAttribute + CoordinateIndex
));
}
for(int32 CoordinateIndex = InData.TextureCoordinates.Num();CoordinateIndex < MAX_TEXCOORDS;CoordinateIndex++)
{
OutElements.Add(AccessStreamComponent(
InData.TextureCoordinates[InData.TextureCoordinates.Num() - 1],
BaseTexCoordAttribute + CoordinateIndex
));
}
}
// Account for the possibility that the mesh has no vertex colors
if( InData.ColorComponent.VertexBuffer )
{
OutElements.Add(AccessStreamComponent(InData.ColorComponent, 13));
}
else
{
//If the mesh has no color component, set the null color buffer on a new stream with a stride of 0.
//This wastes 4 bytes of bandwidth per vertex, but prevents having to compile out twice the number of vertex factories.
FVertexStreamComponent NullColorComponent(&GNullColorVertexBuffer, 0, 0, VET_Color);
OutElements.Add(AccessStreamComponent(NullColorComponent,13));
}
// bone indices decls
OutElements.Add(AccessStreamComponent(InData.BoneIndices,3));
// bone weights decls
OutElements.Add(AccessStreamComponent(InData.BoneWeights,4));
if (bExtraBoneInfluencesT)
{
// Extra bone indices & weights decls
OutElements.Add(AccessStreamComponent(InData.ExtraBoneIndices, 14));
OutElements.Add(AccessStreamComponent(InData.ExtraBoneWeights, 15));
}
}
void FMeshParticleVertexFactory::InitRHI()
{
FVertexDeclarationElementList Elements;
const bool bInstanced = GetFeatureLevel() >= ERHIFeatureLevel::SM4;
if (Data.bInitialized)
{
if(bInstanced)
{
// Stream 0 - Instance data
{
checkf(DynamicVertexStride != -1, TEXT("FMeshParticleVertexFactory does not have a valid DynamicVertexStride - likely an empty one was made, but SetStrides was not called"));
FVertexStream VertexStream;
VertexStream.VertexBuffer = NULL;
VertexStream.Stride = 0;
VertexStream.Offset = 0;
Streams.Add(VertexStream);
// @todo metal: this will need a valid stride when we get to instanced meshes!
Elements.Add(FVertexElement(0, Data.TransformComponent[0].Offset, Data.TransformComponent[0].Type, 8, DynamicVertexStride, Data.TransformComponent[0].bUseInstanceIndex));
Elements.Add(FVertexElement(0, Data.TransformComponent[1].Offset, Data.TransformComponent[1].Type, 9, DynamicVertexStride, Data.TransformComponent[1].bUseInstanceIndex));
Elements.Add(FVertexElement(0, Data.TransformComponent[2].Offset, Data.TransformComponent[2].Type, 10, DynamicVertexStride, Data.TransformComponent[2].bUseInstanceIndex));
Elements.Add(FVertexElement(0, Data.SubUVs.Offset, Data.SubUVs.Type, 11, DynamicVertexStride, Data.SubUVs.bUseInstanceIndex));
Elements.Add(FVertexElement(0, Data.SubUVLerpAndRelTime.Offset, Data.SubUVLerpAndRelTime.Type, 12, DynamicVertexStride, Data.SubUVLerpAndRelTime.bUseInstanceIndex));
Elements.Add(FVertexElement(0, Data.ParticleColorComponent.Offset, Data.ParticleColorComponent.Type, 14, DynamicVertexStride, Data.ParticleColorComponent.bUseInstanceIndex));
Elements.Add(FVertexElement(0, Data.VelocityComponent.Offset, Data.VelocityComponent.Type, 15, DynamicVertexStride, Data.VelocityComponent.bUseInstanceIndex));
}
// Stream 1 - Dynamic parameter
{
checkf(DynamicParameterVertexStride != -1, TEXT("FMeshParticleVertexFactory does not have a valid DynamicParameterVertexStride - likely an empty one was made, but SetStrides was not called"));
FVertexStream VertexStream;
VertexStream.VertexBuffer = NULL;
VertexStream.Stride = 0;
VertexStream.Offset = 0;
Streams.Add(VertexStream);
Elements.Add(FVertexElement(1, 0, VET_Float4, 13, DynamicParameterVertexStride, true));
}
}
if(Data.PositionComponent.VertexBuffer != NULL)
{
Elements.Add(AccessStreamComponent(Data.PositionComponent,0));
}
// only tangent,normal are used by the stream. the binormal is derived in the shader
uint8 TangentBasisAttributes[2] = { 1, 2 };
for(int32 AxisIndex = 0;AxisIndex < 2;AxisIndex++)
{
if(Data.TangentBasisComponents[AxisIndex].VertexBuffer != NULL)
{
Elements.Add(AccessStreamComponent(Data.TangentBasisComponents[AxisIndex],TangentBasisAttributes[AxisIndex]));
}
}
// Vertex color
if(Data.VertexColorComponent.VertexBuffer != NULL)
{
Elements.Add(AccessStreamComponent(Data.VertexColorComponent,3));
}
else
{
//If the mesh has no color component, set the null color buffer on a new stream with a stride of 0.
//This wastes 4 bytes of bandwidth per vertex, but prevents having to compile out twice the number of vertex factories.
FVertexStreamComponent NullColorComponent(&GNullColorVertexBuffer, 0, 0, VET_Color);
Elements.Add(AccessStreamComponent(NullColorComponent,3));
}
if(Data.TextureCoordinates.Num())
{
const int32 BaseTexCoordAttribute = 4;
for(int32 CoordinateIndex = 0;CoordinateIndex < Data.TextureCoordinates.Num();CoordinateIndex++)
{
Elements.Add(AccessStreamComponent(
Data.TextureCoordinates[CoordinateIndex],
BaseTexCoordAttribute + CoordinateIndex
));
}
for(int32 CoordinateIndex = Data.TextureCoordinates.Num();CoordinateIndex < MAX_TEXCOORDS;CoordinateIndex++)
{
Elements.Add(AccessStreamComponent(
Data.TextureCoordinates[Data.TextureCoordinates.Num() - 1],
BaseTexCoordAttribute + CoordinateIndex
));
}
}
if(Streams.Num() > 0)
{
InitDeclaration(Elements,Data);
check(IsValidRef(GetDeclaration()));
}
}
}
