3DLDF – Three-dimensional drawing with METAPOST output

3DLDF is a package for three-dimensional drawing with METAPOST output. It currently does not possess an input routine, so that user code must be written in C++, compiled, and linked with the rest of the program. 3DLDF is intended, among other things, to provide a fairly convenient way of making 3D drawings that can be included in TeX documents.