C[omp]ute

From: andrew cooke <andrew@...>

Date: Wed, 6 Jul 2016 14:49:07 -0400

I just got this working in hexpilot
https://github.com/andrewcooke/hexpilot

The display, instead of being rendered directly to the screen, is
rendered to an intermediate buffer (backed by a texture).  This
texture is then written to the output buffer.

Which is pointless, of course, but opens up a whole world of
possibilities.  The plan is to have a texture that accumulates several
display updates so that the screen blurs and smears like an old CRT
(the idea is to duplicate the old vector screens of asteroids, etc).

This would have been impossible without this excellent guide
http://learnopengl.com/#!Advanced-OpenGL/Framebuffers
which described exactly what I needed.

Even so, I can't believe that the code worked "first time" without me
having a blank screen for hours and hours as I searched for mistakes.
Yay!

Andrew