Re: Povray terminal driver

[Robert H. <en...@no...>]

Have you confused the povray terminal and the opengl terminal?

I thought the povray terminal just dumped a povray file that you could
later render in povray?

Anyway the issue with the glut library is as follows:

The "standard" glut, i.e. the one distributed by SGI and in common usage
on many platforms, is written under the assumption that your program
registers a number of event handlers and then pass control over to glut.
This is a limitation that makes it hard to add glut based opengl on to
existing programs, or programs where another toolkit is used for another
part of the interface.

freeglut (and I thought openglut) work around this problem by allowing you
to do a single pass through the glut event loop and then regain
control. This makes it very easy to do glut based opengl in existing
applications.

When I wrote the opengl terminal driver I used freeglut, which is the
default glut on Debian, without even realising I was doing anything
non-standard.

The choice is: 

a) create a gnuplot_opengl (similar to the X11
terminal)
b) require an "enhanced" glut
c) Use raw OpenGL (without any glut)
d) multi-threaded

Personally I am in favour of the second option. Freeglut is
standard/available in Debian, Ubuntu, and (as I understand
it) Fedora/Red-hat.

Rob

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