Now at version 5.0 of the macros.

http://ytdp.ee.wits.ac.za/cct.html

To install(as root):

cd /usr/local
tar zxf cm.tgz
In your ~/.bashrc put:
export M4PATH=/usr/local/lib/cct

For Doze:
mkdir \apps\cct
cd \apps\cct
unzip cm.zip

Add \apps\cct\bin to your PATH
Add M4PATH=\apps\cct to your environment

Voila!

I have made a few bug fixes to get around a bug in GNU pic. (Marked by ARC
in libcct.m4). In addition, I have provided a new liborth.m4 for the rather
odd Orthographic Projection so loved in Electromagnetics.

