public static extern SU_RESULT SUFaceGetUVHelperWithTextureHandle(SUFaceRef face, bool front, bool back, SUTextureWriterRef texture_writer, long textureHandle, ref SUUVHelperRef uv_helper);
public static extern SU_RESULT SUUVHelperGetBackUVQ(SUUVHelperRef uvhelper, ref SUPoint3D point, ref SUUVQ uvq);
public static extern SU_RESULT SUMeshHelperCreateWithTextureWriter(ref SUMeshHelperRef mesh_ref, SUFaceRef face_ref, SUUVHelperRef uv_celper_ref);
public static extern SU_RESULT SUUVHelperRelease(ref SUUVHelperRef uvhelper);