OpenGL2: Fix merged lightmaps using tcGen environment

ioquake / ioq3

The ioquake3 community effort to continue supporting/developing id's Quake III Arena

https://ioquake3.org/

GNU General Public License v2.0

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Closed zturtleman closed 9 months ago

zturtleman commented 9 months ago

Fix the texcoord range for external lightmaps in a shader with an internal lightmap to be 0.0 to 1.0. (With texture repeating it would wrap around and read correctly but clampMap or tcMods might not of worked.)
Fix merged lightmaps using tcGen environment. (Fixes #636.)
Only apply the hack to fix tcMod transform on internal merged lightmaps to tcGen lightmap.