SFTtech/openage — pull request #138 by franciscod (2014-11-07 05:17:33+00:00)
Title: add debug overlay grid, togglable with F4

Inspired on #135.

This simply draws 2d lines over the screen: it has no fancy shaders or anything. It won't work once we have terrain altitude. But it has helped me to spot what I think it's a bug on the coordinate conversion code :D also, it's useful for fixing #57.