Copy UV From Fbx File To UStaticMesh

Development Pipeline & Plugins
, , , ,
1

What I Want do Is

  1. Export StaticMesh To Fbx.
  2. Modify Fbx UV Use RizomUV Software
  3. Transfer Fbx UV Channel To Specified UV Channel Of StaticMesh (C++)

I Read Fbx UV Info Through Fbx SDK

if (lUVElement->GetMappingMode() == FbxGeometryElement::eByPolygonVertex)
        {
            int lPolyIndexCounter = 0;
            for( int lPolyIndex = 0; lPolyIndex < lPolyCount; ++lPolyIndex )
            {
                // build the max index array that we need to pass into MakePoly
                const int lPolySize = pMesh->GetPolygonSize(lPolyIndex);
                for( int lVertIndex = 0; lVertIndex < lPolySize; ++lVertIndex )
                {
                    if (lPolyIndexCounter < lIndexCount)
                    {
                        FbxVector2 lUVValue;

                        //the UV index depends on the reference mode
                        int lUVIndex = lUseIndex ? lUVElement->GetIndexArray().GetAt(lPolyIndexCounter) : lPolyIndexCounter;

                        lUVValue = lUVElement->GetDirectArray().GetAt(lUVIndex);

                        //User TODO:
                        //Print out the value of UV(lUVValue) or log it to a file

                        lPolyIndexCounter++;
                    }
                }
            }
        }

But UStaticMesh SetUVChannel Need FVertexInstanceId.

bool SetUVChannel
(
    int32 LODIndex,
    int32 UVChannelIndex,
    const TMap < FVertexInstanceID , FVector2D > & TexCoords
)