Miso scene revamp to more cleanly deal with object tiles and their

associated metrics. Also fixed render order handling such that any
overlapping object tiles are rendered in the order that they are added to
the scene. This gives us control over what to do in situations that are
impossible to determine based on object footprint alone.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1708 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/miso/tools/EditableMisoScene.java

@@ -1,5 +1,5 @@
 //
-// $Id: EditableMisoScene.java,v 1.16 2002/05/17 19:06:23 ray Exp $
+// $Id: EditableMisoScene.java,v 1.17 2002/09/18 02:32:57 mdb Exp $
 
 package com.threerings.miso.scene.tools;
 
@@ -66,13 +66,15 @@ public interface EditableMisoScene
      * @param tile the tile to set.
      * @param fqTileId the fully-qualified tile id (@see
      * TileUtil#getFQTileId}) of the new default base tile.
+     *
+     * @return the new object's index in the object list.
      */
-    public void addObjectTile (ObjectTile tile, int x, int y, int fqTileId);
+    public int addObjectTile (ObjectTile tile, int x, int y, int fqTileId);
 
     /**
      * Sets the action string for the specified object tile.
      */
-    public void setObjectAction (ObjectTile tile, String action);
+    public void setObjectAction (int index, String action);
 
     /**
      * Clears out the tile at the specified location in the base layer.
@@ -80,14 +82,15 @@ public interface EditableMisoScene
     public void clearBaseTile (int x, int y);
 
     /**
-     * Clears out the specified tile from the object list.
+     * Clears out the specified object tile at the specified coordinates
+     * from the object list.
      */
-    public void removeObjectTile (ObjectTile tile);
+    public void removeObjectTile (int index);
 
     /**
      * Clears the action string for the specified object tile.
      */
-    public void clearObjectAction (ObjectTile tile);
+    public void clearObjectAction (int index);
 
     /**
      * Returns a reference to the miso scene model that reflects the