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Implement a better hack for warping surfaces regarding lightning.

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The old hack was sufficient for classic rendering, but break with
gl_overbrightbits enabled. See the inline comment for details.
This commit is contained in:
Yamagi Burmeister 2016-08-12 20:28:21 +02:00
parent d6136cbba5
commit f16928f2cf
1 changed files with 24 additions and 4 deletions
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28
src/client/refresh/r_surf.c
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@ -443,10 +443,30 @@ R_RenderBrushPoly(msurface_t *fa)
{
R_Bind(image->texnum);
/* warp texture, no lightmaps */
R_TexEnv(GL_MODULATE);
glColor4f(gl_state.inverse_intensity, gl_state.inverse_intensity,
gl_state.inverse_intensity, 1.0f);
/* This is a hack ontop of a hack. Warping surfaces like those generated
by R_EmitWaterPolys() don't have a lightmap. Original Quake II therefor
negated the global intensity on those surfaces, because otherwise they
would show up much too bright. When we implemented overbright bits this
hack modified the global GL state in an incompatible way. So implement
a new hack, based on overbright bits... Depending on the value set to
gl_overbrightbits the result is different:
0: Old behaviour.
1: No overbright bits on the global scene but correct lightning on
warping surfaces. */
if (gl_overbrightbits->value)
{
R_TexEnv(GL_COMBINE_EXT);
R_SelectTexture(GL_TEXTURE1);
glTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_EXT, gl_overbrightbits->value);
}
else
{
R_TexEnv(GL_MODULATE);
glColor4f(gl_state.inverse_intensity, gl_state.inverse_intensity,
gl_state.inverse_intensity, 1.0f);
}
R_EmitWaterPolys(fa);
R_TexEnv(GL_REPLACE);