🚀 go-pugleaf

	I am using the grx graphics library, and would like some help
on achieving non-flickering animation. Basically the output of my
program is a continually evolving 2-D grid of points. I draw the grid
on one cycle through. Then the next time round I rub it out and draw
the new one. But I get a horrible flickering. The program is
generating new grids at a fast enough rate to avoid the < 70 Hz
flicker. Seems like a sort of temporal interference type problem.

	The Borland C/C++ graphics supports switching between display
pages, so that you can draw the new grid on a "virtual" page and then
quickly switch to it. (I tried that on a Borland compiler but still
got the flicker.. maybe I'm doing something totally stupid?).
	Does the grx library support something like that? The
"context" thing sounds similar, but it seems that you can only draw to
the "current" context, which is presumably the one that is displayed
at the time.
	My knowledge of animation on computers is minimal (can you
tell?) so it could be there is a better way of doing things than
switching pages. But if that IS the best way, how do you do it in
djgpp?

Thanks!

Mike B.
mrb@robots.ox.ac.uk