There are several cases when "world transform" matrix for any arbitrary scene graph node is necessary to obtain. We faced it during development of JavaOne 2011 demos.

By "world transform" we mean the matrix that converts scene coordinates into node coordinates for any particular node. Existing operation of conversion between local and scene coordinates has a bottleneck in Affine3D.createInverse() method which creates new Affine3D matrix instance each time it is invoked.