DOWNLOADING:

Note that OpenGL *binaries* are available for all sorts of platforms.
It's *source* that's hard to get.  All you need for ps1 is the
binaries, so don't worry about installing Mesa (the open-source
reimplementation of OpenGL) for this ps if you have trouble with it.

For Windows, our text recommends the following (p. 818):

 OpenGL libraries (.dll, .lib and .h files):
   ftp://ftp.microsoft.com/softlib/mslfiles/opengl95.exe

 GLUT:
   http://reality.sgi.com/opengl/glut3/glutdlls.zip

The .exe is a self-extracting archive (just run it); the .zip can be
unpacked using WinZip (free download off the 'net from
http://www.winzip.com)

For the Mac: (thanks to Andrew)

http://developer.apple.com/opengl/
Get the OpenGL SDK 1.2  <--includes source and libs.


LINUX:

Steph just pointed out a potential quirk with compiling under linux
with Mesa: you *must* have both these declarations in your compilation
statement:

       -I/tools/cs/Mesa-3.4/include -I/tools/cs/Mesa-3.4/include/GL

because "gl.h" is in the search path /tools/cs/Mesa-3.4/include/GL,
but it includes another header, namely "glext.h," but it includes it
in a silly manner-- namely by looking for "GL/glext.h", which means
that /tools/cs/Mesa-3.4/include must *also* be in the header search
path.

James has this info on his graphics webpage (see links at bottom of
course homepage), as well as a sample makefile that people can grab.

OUTPUT: (thanks to Aditi)

To dump a screen window to a file:

xwd -out filename

Use xwud to "undump" it.

Use xpr to turn it into, say, postscript:

xpr -device ps {-rv -portrait} -o filename.ps filename

The {} are possibly useful options.