- solidify/main.pov: change name from "Part" to "Part_batcvr"
- solidify/solid.h (povray), solidify/solid.c (sanitize, povray): use the
project name as prefix for PGM files and a suffix for the object name
- solidify/solidify.c (main): pass the project's basename to povray()
- solidify/Makefile: added solid.o
- solidify/solid.h, solidify.c (height_field, povray): output the part as
the intersection of two height fields
- solidify/solidify.c (main): generate POV-Ray output if stdout is
redirected
- solidify/Makefile (run, pov, disp): targets to run a test setup, render
it, and display the result
- solidify/main.pov: simple scene showing the test part
