From: Rudolf Polzer <divverent@xonotic.org>
Date: Tue, 18 Oct 2011 15:07:24 +0000 (+0200)
Subject: alphashadow/lightfilter: bound the texcoords after converting to integer to guard... 
X-Git-Tag: xonotic-v0.6.0~63
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=d67672d1b3a9c8e0e3408c74f18c413af087af6b;p=xonotic%2Fnetradiant.git

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

diff --git a/tools/quake3/q3map2/light_trace.c b/tools/quake3/q3map2/light_trace.c
index 84e4ab0e..a328f466 100644
--- a/tools/quake3/q3map2/light_trace.c
+++ b/tools/quake3/q3map2/light_trace.c
@@ -1498,6 +1498,10 @@ qboolean TraceTriangle( traceInfo_t *ti, traceTriangle_t *tt, trace_t *trace )
 	t = t - floor( t );
 	is = s * si->lightImage->width;
 	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 */
 	pixel = si->lightImage->pixels + 4 * (it * si->lightImage->width + is);