X-Git-Url: https://de.git.xonotic.org/?a=blobdiff_plain;f=tools%2Fquake3%2Fcommon%2Fpolylib.c;h=af4b98e4a113b1bfb318ceaf88cb0692d8e7ba6e;hb=323c01a9834da9b91c695e4cd4c735a944d7608e;hp=34dd173ecbd0473715dd3a688ce22ac785f6756d;hpb=94cb905da9c38e65cff6dcd9a56874c33c367df2;p=xonotic%2Fnetradiant.git

diff --git a/tools/quake3/common/polylib.c b/tools/quake3/common/polylib.c
index 34dd173e..af4b98e4 100644
--- a/tools/quake3/common/polylib.c
+++ b/tools/quake3/common/polylib.c
@@ -536,7 +536,7 @@ winding_t	*ReverseWinding (winding_t *w)
 ClipWindingEpsilon
 =============
 */
-void	ClipWindingEpsilon (winding_t *in, vec3_t normal, vec_t dist, 
+void	ClipWindingEpsilonStrict (winding_t *in, vec3_t normal, vec_t dist, 
 				vec_t epsilon, winding_t **front, winding_t **back)
 {
 	vec_t	dists[MAX_POINTS_ON_WINDING+4];
@@ -573,6 +573,10 @@ void	ClipWindingEpsilon (winding_t *in, vec3_t normal, vec_t dist,
 	
 	*front = *back = NULL;
 
+	if (!counts[0] && !counts[1])
+	{
+		return;
+	}
 	if (!counts[0])
 	{
 		*back = CopyWinding (in);
@@ -643,6 +647,15 @@ void	ClipWindingEpsilon (winding_t *in, vec3_t normal, vec_t dist,
 		Error ("ClipWinding: MAX_POINTS_ON_WINDING");
 }
 
+void	ClipWindingEpsilon (winding_t *in, vec3_t normal, vec_t dist, 
+				vec_t epsilon, winding_t **front, winding_t **back)
+{
+	ClipWindingEpsilonStrict(in, normal, dist, epsilon, front, back);
+	/* apparently most code expects that in the winding-on-plane case, the back winding is the original winding */
+	if(!*front && !*back)
+		*back = CopyWinding(in);
+}
+
 
 /*
 =============