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Fix linedef alpha in Software

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This commit is contained in:
Sally Coolatta 2023-03-18 07:01:31 -04:00
parent c7fa8fc2bc
commit d83832f6e0
1 changed files with 19 additions and 13 deletions
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32
src/r_segs.c
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@ -132,14 +132,18 @@ static void R_Render2sidedMultiPatchColumn(column_t *column, column_t *brightmap
transnum_t R_GetLinedefTransTable(fixed_t alpha)
{
transnum_t transnum = NUMTRANSMAPS; // Send back NUMTRANSMAPS for none
if (alpha > 0 && alpha < FRACUNIT)
if (alpha >= FRACUNIT)
{
transnum = (20*(FRACUNIT - alpha - 1) + FRACUNIT) >> (FRACBITS+1);
return 0;
}
else if (alpha <= 0)
{
return NUMTRANSMAPS;
}
else
{
return (20*(FRACUNIT - alpha - 1) + FRACUNIT) >> (FRACBITS+1);
}
return transnum;
}
void R_RenderMaskedSegRange(drawseg_t *ds, INT32 x1, INT32 x2)
@ -172,16 +176,18 @@ void R_RenderMaskedSegRange(drawseg_t *ds, INT32 x1, INT32 x2)
windowbottom = windowtop = sprbotscreen = INT32_MAX;
ldef = curline->linedef;
if (!ldef->alpha)
return;
transtable = R_GetLinedefTransTable(ldef->alpha);
blendmode = ldef->blendmode;
if (transtable == NUMTRANSMAPS
|| blendmode == AST_MODULATE
|| blendmode == AST_FOG)
if (transtable == NUMTRANSMAPS)
{
// Invisible, so don't render
return;
}
blendmode = ldef->blendmode;
if (blendmode == AST_MODULATE || blendmode == AST_FOG)
{
// These blend modes don't use translucency
transtable = 0;
}