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447: Allow alternate alpha without relative calc

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This commit is contained in:
mazmazz 2018-09-12 07:38:51 -04:00
parent 9a388af8ec
commit 6f0b28c48f
1 changed files with 19 additions and 1 deletions
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20
src/p_spec.c
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@ -3287,7 +3287,25 @@ static void P_ProcessLineSpecial(line_t *line, mobj_t *mo, sector_t *callsec)
Z_Free(exc);
}
else
sectors[secnum].extra_colormap = line->frontsector->extra_colormap;
{
if (line->flags & ML_DONTPEGBOTTOM) // alternate alpha (by texture offsets)
{
extracolormap_t *exc = R_CopyColormap(line->frontsector->extra_colormap, false);
exc->rgba = R_GetRgbaRGB(exc->rgba) + R_PutRgbaA(max(min(sides[line->sidenum[0]].textureoffset >> FRACBITS, 25), 0));
exc->fadergba = R_GetRgbaRGB(exc->fadergba) + R_PutRgbaA(max(min(sides[line->sidenum[0]].rowoffset >> FRACBITS, 25), 0));
if (!(sectors[secnum].extra_colormap = R_GetColormapFromList(exc)))
{
exc->colormap = R_CreateLightTable(exc);
R_AddColormapToList(exc);
sectors[secnum].extra_colormap = exc;
}
else
Z_Free(exc);
}
else
sectors[secnum].extra_colormap = line->frontsector->extra_colormap;
}
}
break;