/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2007-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.renderer3d.utils.canvas3d;
/**
* A listener that is called for each frame that is rendered.
* The listener is called in the swing thread, so it can update the swing UI.
*
* @author Hans H�ggstr�m
*/
public interface FrameListener
{
/**
* Called each frame, in the swing thread context.
*
* @param secondsSinceLastFrame number of seconds since the last frame, or a negative value if this is the first frame.
*/
void onFrame( double secondsSinceLastFrame );
}