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Classic: prevent visibility overflow on sloped ceilings/floors at large distances.

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git-svn-id: https://svn.eduke32.com/eduke32@4453 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2014-04-21 17:00:51 +00:00
parent 8d9282bc24
commit 653c1b8acd
1 changed files with 10 additions and 4 deletions
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14
polymer/eduke32/build/src/engine.c
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@ -4416,10 +4416,16 @@ static void grouscan(int32_t dax1, int32_t dax2, int32_t sectnum, char dastat)
asm1 = -(globalzd>>(16-BITSOFPRECISION)); asm1 = -(globalzd>>(16-BITSOFPRECISION));
globvis = globalvisibility; {
if (sec->visibility != 0) globvis = mulscale4(globvis, (uint8_t)(sec->visibility+16)); int32_t vis = globalvisibility;
globvis = mulscale13(globvis,daz); int64_t lvis;
globvis = mulscale16(globvis,xdimscale);
if (sec->visibility != 0) vis = mulscale4(vis, (uint8_t)(sec->visibility+16));
lvis = ((uint64_t)vis*daz) >> 13;
lvis = (lvis * xdimscale) >> 16;
globvis = lvis > INT32_MAX ? INT32_MAX : lvis;
}
j = FP_OFF(palookup[globalpal]); j = FP_OFF(palookup[globalpal]);
setupslopevlin_alsotrans((picsiz[globalpicnum]&15) + ((picsiz[globalpicnum]>>4)<<8), setupslopevlin_alsotrans((picsiz[globalpicnum]&15) + ((picsiz[globalpicnum]>>4)<<8),