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alphashadow/lightfilter: bound the texcoords after converting to integer to guard against float accuracy issues

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This commit is contained in:
Rudolf Polzer 2011-10-18 17:07:24 +02:00
parent 6a27f87936
commit d67672d1b3
1 changed files with 4 additions and 0 deletions
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4
tools/quake3/q3map2/light_trace.c
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@ -1498,6 +1498,10 @@ qboolean TraceTriangle( traceInfo_t *ti, traceTriangle_t *tt, trace_t *trace )
t = t - floor( t ); t = t - floor( t );
is = s * si->lightImage->width; is = s * si->lightImage->width;
it = t * si->lightImage->height; it = t * si->lightImage->height;
if(is < 0) is = 0;
if(is > si->lightImage->width - 1) is = si->lightImage->width - 1;
if(it < 0) it = 0;
if(it > si->lightImage->height - 1) it = si->lightImage->height - 1;
/* get pixel */ /* get pixel */
pixel = si->lightImage->pixels + 4 * (it * si->lightImage->width + is); pixel = si->lightImage->pixels + 4 * (it * si->lightImage->width + is);