Created a path for panning the camera.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3759 542714f4-19e9-0310-aa3c-eee0fc999fb1
2005-11-11 03:00:12 +00:00
parent 176329e1ed
commit 672368ff92
1 changed files with 58 additions and 0 deletions
@@ -0,0 +1,58 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2005 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.jme.camera;
+
+import com.jme.math.Vector3f;
+
+/**
+ * Pans the camera to the specified location in the specified amount of time.
+ */
+public class PanPath extends CameraPath
+{
+    /**
+     * Creates a panning path for the specified camera.
+     *
+     * @param target the target position for the camera.
+     * @param duration the number of seconds in which to pan the camera.
+     */
+    public PanPath (CameraHandler camhand, Vector3f target, float duration)
+    {
+        super(camhand);
+
+        _start = new Vector3f(camhand.getCamera().getLocation());
+        _velocity = target.subtract(_start);
+        _velocity.divideLocal(duration);
+        _duration = duration;
+    }
+
+    // documentation inherited
+    public boolean tick (float secondsSince)
+    {
+        _elapsed += secondsSince;
+        _camloc.scaleAdd(Math.min(_elapsed, _duration), _velocity, _start);
+        _camhand.setLocation(_camloc);
+        return (_elapsed >= _duration);
+    }
+
+    protected Vector3f _start, _velocity, _camloc = new Vector3f();
+    protected float _elapsed, _duration;
+}