Added MisoUtil.getTileHash(), made both SceneBlock and AutoFringer use

it to pick random tiles based on x/y location.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2622 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/tile/AutoFringer.java

@@ -1,5 +1,5 @@
 //
-// $Id: AutoFringer.java,v 1.23 2003/05/29 01:04:58 ray Exp $
+// $Id: AutoFringer.java,v 1.24 2003/05/29 01:58:06 ray Exp $
 
 package com.threerings.miso.tile;
 
@@ -33,6 +33,7 @@ import com.threerings.media.image.ImageManager;
 import com.threerings.media.image.Mirage;
 
 import com.threerings.miso.data.MisoSceneModel;
+import com.threerings.miso.util.MisoUtil;
 
 /**
  * Automatically fringes a scene according to the rules in the supplied
@@ -110,16 +111,7 @@ public class AutoFringer
             }
         }
 
-        return composeFringeTile(frecs, masks, generateHashValue(col, row));
-    }
-
-    /**
-     * Create a hash value for picking which fringe to use for a particular
-     * tile.
-     */
-    protected int generateHashValue (int col, int row)
-    {
-        return col ^ row;
+        return composeFringeTile(frecs, masks, MisoUtil.getTileHash(col, row));
     }
 
     /**

src/java/com/threerings/miso/tile/FringeConfiguration.java

@@ -1,5 +1,5 @@
 //
-// $Id: FringeConfiguration.java,v 1.14 2003/05/29 01:04:58 ray Exp $
+// $Id: FringeConfiguration.java,v 1.15 2003/05/29 01:58:06 ray Exp $
 
 package com.threerings.miso.tile;
 
@@ -122,10 +122,8 @@ public class FringeConfiguration implements Serializable
     public FringeTileSetRecord getFringe (int baseset, int hashValue)
     {
         FringeRecord f = (FringeRecord) _frecs.get(baseset);
-
-        int size = f.tilesets.size();
-        int pick = Math.abs(hashValue) % size;
-        return (FringeTileSetRecord) f.tilesets.get(pick);
+        return (FringeTileSetRecord) f.tilesets.get(
+            hashValue % f.tilesets.size());
     }
 
     /** The mapping from base tileset id to fringerecord. */