How can I create U3D file (make 3D in PDF)?
There are 2 steps: first you should create IDTF file, and later convert it to U3D. You can use U3D tools for converting IDTF file to U3D. It need libharu 2.1.0 or later. For installation use ./bootstrap, ./configure, make, sudo make install. It provide IDTFConverter program for converting textual files *.idtf to binary files *.u3d. Last ones can be included into PDF.