Made MisoTileSet an interface.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@449 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -0,0 +1,56 @@
+//
+// $Id: MisoTileSetImpl.java,v 1.1 2001/10/12 00:43:04 shaper Exp $
+
+package com.threerings.miso.tile;
+
+import com.threerings.media.tile.*;
+
+import com.threerings.miso.scene.MisoScene;
+
+/**
+ * The miso tile set class extends the base tile set class to add
+ * support for tile passability.  Passability is used to determine
+ * whether {@link com.threerings.miso.scene.Traverser} objects can
+ * traverse a particular tile in a {@link
+ * com.threerings.miso.scene.MisoScene}.
+ */
+public class MisoTileSetImpl
+    extends TileSetImpl
+    implements MisoTileSet
+{
+    /** The miso scene layer the tiles are intended for. */
+    public int layer;
+
+    /** Whether each tile is passable. */
+    public int passable[];
+
+    // documentation inherited
+    public Tile createTile (int tid)
+    {
+	// only create miso tiles for the base layer
+	if (layer != MisoScene.LAYER_BASE) {
+	    return super.createTile(tid);
+	}
+
+	return new MisoTile(tsid, tid);
+    }
+
+    // documentation inherited
+    protected void populateTile (Tile tile)
+    {
+	super.populateTile(tile);
+
+	if (tile instanceof MisoTile) {
+	    // set the tile's passability, defaulting to passable if this
+	    // tileset has no passability specified
+	    ((MisoTile)tile).passable =
+		(passable == null || (passable[tile.tid] == 1));
+	}
+    }
+
+    // documentation inherited
+    public int getLayerIndex ()
+    {
+        return layer;
+    }
+}