Mike Erwin 42bbfe7f0a OpenGL: draw grid floor & axes with new immediate mode
Significant rewrite with some improvements.

Maintain visual hierarchy of the grid:
- emphasized lines draw atop normal lines
- axes draw atop all lines (same as before)

Draw axes only once, not twice.

Return early if nothing to draw.

Single draw call for the default case (grid floor with X and Y axes).

Z axis needs a second draw call because it uses 3D coordinates.

Part of T49043
2016-08-26 01:12:44 -04:00
2016-08-01 11:02:01 +10:00
2013-12-24 22:57:27 +06:00
2016-07-15 01:28:00 +10:00
2010-10-13 14:44:22 +00:00
2016-07-15 01:26:26 +10:00
2016-02-10 00:26:12 +11:00
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