From a4339f057080f9d8ea51dec8dfbc5a29ab586215 Mon Sep 17 00:00:00 2001
From: neoraider <devnull@localhost>
Date: Mon, 14 May 2007 19:11:02 +0000
Subject: libzoom: Compute default normals

---
 level.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'level.c')

diff --git a/level.c b/level.c
index 0d22f64..9118499 100644
--- a/level.c
+++ b/level.c
@@ -270,11 +270,19 @@ LEVEL *LoadLevel(char *filename) {
           }
         }
       }
+      
       v = VectorCross(
         VectorSub(level->rooms[i].walls[j].vertices[1], level->rooms[i].walls[j].vertices[0]),
         VectorSub(level->rooms[i].walls[j].vertices[2], level->rooms[i].walls[j].vertices[0])
       );
-      if(VectorLengthSq(v)) level->rooms[i].walls[j].normal = VectorNormalize(v);
+      if(VectorLengthSq(v) > 0.0) {
+        level->rooms[i].walls[j].normal = VectorNormalize(v);
+        
+        for(k = 0; k < 3; k++) {
+          if(VectorLengthSq(level->rooms[i].walls[j].normals[k]) == 0.0)
+            level->rooms[i].walls[j].normals[k] = level->rooms[i].walls[j].normal;
+        }
+      }
       
       j++;
     }
-- 
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