MS Visual Studio .NET.rar frame.CombinedTransformationMatrix = frame.TransformationMatrix * parentMatrix if (frame.FrameSibling != null) { UpdateFrameMatrices((FrameDerived)frame.FrameSibling, parentMatrix) } if (frame.FrameFirstChild != null) { UpdateFrameMatrices((FrameDerived)frame.FrameFirstChild, frame.CombinedTransformationMatrix) }