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light: q2: change sky lighting logic: only emit light if: sky flag set, light flag set, value nonzero 

TODO: may need to use "value" more than just checking for nonzero
This commit is contained in:
Eric Wasylishen 2021-01-01 00:30:40 -07:00
parent 3b629f3ce9
commit 09623934e8
1 changed files with 17 additions and 3 deletions
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20
light/trace_embree.cc
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@ -624,6 +624,7 @@ Embree_TraceInit(const mbsp_t *bsp)
}
const int contents = Face_Contents(bsp, face); //mxd
const gtexinfo_t *texinfo = Face_Texinfo(bsp, face);
//mxd. Skip NODRAW faces, but not SKY ones (Q2's sky01.wal has both flags set)
if(bsp->loadversion == Q2_BSPVERSION && (contents & Q2_SURF_NODRAW) && !(contents & Q2_SURF_SKY))
@ -645,9 +646,22 @@ Embree_TraceInit(const mbsp_t *bsp)
}
// handle sky
if (/* !Q_strncasecmp("sky", texname, 3) */ bsp->loadversion == Q2_BSPVERSION ? contents & Q2_SURF_SKY : contents == CONTENTS_SKY) { //mxd
skyfaces.push_back(face);
continue;
if (bsp->loadversion == Q2_BSPVERSION) {
// Q2: arghrad compat: sky faces only emit sunlight if:
// sky flag set, light flag set, value nonzero
if ((contents & Q2_SURF_SKY) != 0
&& (contents & Q2_SURF_LIGHT) != 0
&& texinfo->value != 0)
{
skyfaces.push_back(face);
continue;
}
} else {
// Q1
if (!Q_strncasecmp("sky", texname, 3)) {
skyfaces.push_back(face);
continue;
}
}
// liquids