Added capability to get translated (in x and y) versions of Arc and Line Paths.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3779 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/util/ArcPath.java

@@ -1,5 +1,5 @@
 //
-// $Id: ArcPath.java,v 1.5 2004/08/27 02:12:47 mdb Exp $
+// $Id$
 //
 // Narya library - tools for developing networked games
 // Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
@@ -81,6 +81,20 @@ public class ArcPath extends TimedPath
             (int)(start.y - Math.round(Math.sin(sangle) * yradius)));
     }
 
+    /**
+     * Return a copy of the path, translated by the specified amounts.
+     */
+    public Path getTranslatedInstance (int x, int y)
+    {
+        int startx =
+            (int)(_center.x + Math.round(Math.cos(_sangle) * _xradius));
+        int starty =
+            (int)(_center.y + Math.round(Math.sin(_sangle) * _yradius));
+
+        return new ArcPath(new Point (startx + x, starty + y),
+            _xradius, _yradius, _sangle, _delta, _duration, _orient);
+    }
+
     /**
      * Sets the offset that is applied to the pathable whenever it is
      * oriented. This offset is in clockwise units whose granularity is

src/java/com/threerings/media/util/LinePath.java

@@ -1,5 +1,5 @@
 //
-// $Id: LinePath.java,v 1.14 2004/08/27 02:12:47 mdb Exp $
+// $Id$
 //
 // Narya library - tools for developing networked games
 // Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
@@ -63,6 +63,20 @@ public class LinePath extends TimedPath
         this(null, dest, duration);
     }
 
+    /**
+     * Return a copy of the path, translated by the specified amounts.
+     */
+    public Path getTranslatedInstance (int x, int y)
+    {
+        if (_source == null) {
+            return new LinePath(null, new Point(_dest.x + x, _dest.y + y),
+                _duration);
+        } else {
+            return new LinePath(_source.x + x, _source.y + y, _dest.x + x,
+                _dest.y + y, _duration);
+        }
+    }
+
     // documentation inherited
     public void init (Pathable pable, long timestamp)
     {