3d pdf objects

i tried for way too much time to compile the u3d reference library from sourceforge, with something tantalizingly close to success. the only way i could actually use it, though, was to use wine on the precompiled windows binary on an idtf file. the only way i have successfully created an idtf is by exporting an imported stl file from meshlab. i did manage to shove the resulting u3d into a pdf, and it looked pretty cool. but i need to find an easier way to make idtf files. EDIT: apparently vrml 97 can be converted to u3d with acrobat 3d. s2plot site gives some instructions, including some basic frame-based animation. also, some russian dude made a vtk->idtf exporter. not sure if he published anywhere. also also, mathgl supposedly has idtf export capability, so things like udav that use it should, too.