From f463907e46f00aff6f267f713d4e8b8c5e741487 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20K=C3=B6ppe?= <tkoeppe@google.com>
Date: Sun, 14 Aug 2016 12:13:18 +0100
Subject: [PATCH] [tools/quake3/q3map2/light{,maps}_ydnar.c] Fix float-to-int
 conversion by preventing NaN values

---
 tools/quake3/q3map2/light_ydnar.c     | 2 +-
 tools/quake3/q3map2/lightmaps_ydnar.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/quake3/q3map2/light_ydnar.c b/tools/quake3/q3map2/light_ydnar.c
index 8d653e3b..e951771c 100644
--- a/tools/quake3/q3map2/light_ydnar.c
+++ b/tools/quake3/q3map2/light_ydnar.c
@@ -2033,7 +2033,7 @@ void IlluminateRawLightmap( int rawLightmapNum ){
 			}
 
 			/* set luxel filter radius */
-			luxelFilterRadius = superSample * filterRadius / lm->sampleSize;
+			luxelFilterRadius = lm->sampleSize != 0 ? superSample * filterRadius / lm->sampleSize : 0;
 			if ( luxelFilterRadius == 0 && ( filterRadius > 0.0f || filter ) ) {
 				luxelFilterRadius = 1;
 			}
diff --git a/tools/quake3/q3map2/lightmaps_ydnar.c b/tools/quake3/q3map2/lightmaps_ydnar.c
index 2079cbb0..e94f101f 100644
--- a/tools/quake3/q3map2/lightmaps_ydnar.c
+++ b/tools/quake3/q3map2/lightmaps_ydnar.c
@@ -518,7 +518,7 @@ qboolean AddPatchToRawLightmap( int num, rawLightmap_t *lm ){
 	length = 0;
 	for ( x = 0; x < ( mesh->width - 1 ); x++ )
 		length += widthTable[ x ];
-	lm->w = ceil( length / lm->sampleSize ) + 1;
+	lm->w = lm->sampleSize != 0 ? ceil( length / lm->sampleSize ) + 1 : 0;
 	if ( lm->w < ds->patchWidth ) {
 		lm->w = ds->patchWidth;
 	}
@@ -531,7 +531,7 @@ qboolean AddPatchToRawLightmap( int num, rawLightmap_t *lm ){
 	length = 0;
 	for ( y = 0; y < ( mesh->height - 1 ); y++ )
 		length += heightTable[ y ];
-	lm->h = ceil( length / lm->sampleSize ) + 1;
+	lm->h = lm->sampleSize != 0 ? ceil( length / lm->sampleSize ) + 1 : 0;
 	if ( lm->h < ds->patchHeight ) {
 		lm->h = ds->patchHeight;
 	}