From e4f4701f235ffbcc68ac696ef06b467974c0208a Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Thu, 12 Feb 2009 15:37:34 +0000
Subject: [PATCH] Performance optimization

---
 panda/src/grutil/geoMipTerrain.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/panda/src/grutil/geoMipTerrain.cxx b/panda/src/grutil/geoMipTerrain.cxx
index 6771dbda10..8a153f5dca 100644
--- a/panda/src/grutil/geoMipTerrain.cxx
+++ b/panda/src/grutil/geoMipTerrain.cxx
@@ -589,9 +589,10 @@ update_block(unsigned short mx, unsigned short my,
   nassertr_always(!_is_dirty, false);
   nassertr_always(mx < (_xsize - 1) / _block_size, false);
   nassertr_always(my < (_ysize - 1) / _block_size, false);
-  if (level == -1) {
+  if (level < -1) {
     level = _levels[mx][my];
   }
+  level = min(max(_min_level, (unsigned short) level), _max_level);
   if (forced || _old_levels[mx][my] != level) { // If the level has changed...
     // Replaces the chunk with a regenerated one.
     generate_block(mx, my, level)->replace_node(_blocks[mx][my].node());