Initial work on support for objects whose images span multiple tiles.

Made TileSet an interface.  Throw exceptions for unknown tile or tile
set requests.  General clean-up and documentation.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@427 542714f4-19e9-0310-aa3c-eee0fc999fb1

tests/src/java/com/threerings/miso/viewer/ViewerFrame.java

@@ -1,5 +1,5 @@
 //
-// $Id: ViewerFrame.java,v 1.18 2001/09/13 19:10:26 mdb Exp $
+// $Id: ViewerFrame.java,v 1.19 2001/10/11 00:41:27 shaper Exp $
 
 package com.threerings.miso.viewer;
 
@@ -12,6 +12,7 @@ import com.samskivert.swing.*;
 
 import com.threerings.media.sprite.*;
 import com.threerings.media.tile.TileManager;
+import com.threerings.media.tile.TileException;
 
 import com.threerings.miso.Log;
 import com.threerings.miso.scene.AmbulatorySprite;
@@ -43,10 +44,7 @@ class ViewerFrame extends JFrame implements WindowListener
         TileManager tilemgr = _ctx.getTileManager();
 
         // add the test character sprite to the sprite manager
-        MultiFrameImage[] anims =
-            TileUtil.getAmbulatorySpriteFrames(tilemgr, TSID_CHAR);
-        AmbulatorySprite sprite = new AmbulatorySprite(300, 300, anims);
-        spritemgr.addSprite(sprite);
+	AmbulatorySprite sprite = createSprite(tilemgr, spritemgr);
 
 	// create a top-level panel to manage everything
 	JPanel top = new JPanel();
@@ -80,6 +78,17 @@ class ViewerFrame extends JFrame implements WindowListener
 	getContentPane().add(top, BorderLayout.CENTER);
     }
 
+    protected AmbulatorySprite createSprite (TileManager tilemgr,
+					     SpriteManager spritemgr)
+    {
+	MultiFrameImage[] anims =
+	    TileUtil.getAmbulatorySpriteFrames(tilemgr, TSID_CHAR);
+	AmbulatorySprite sprite = new AmbulatorySprite(300, 300, anims);
+        spritemgr.addSprite(sprite);
+
+	return sprite;
+    }
+
     /** WindowListener interface methods */
 
     public void windowClosing (WindowEvent e) {