Michael Bayne
c2117ee86d
goodies, both Java 2D and LWJGL/JME 3D. git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@1 ed5b42cb-e716-0410-a449-f6a68f950b19
88 lines
3.0 KiB
Java
88 lines
3.0 KiB
Java
//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2005 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.jme.camera;
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import com.jme.math.Quaternion;
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import com.jme.math.Vector3f;
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import com.jme.renderer.Camera;
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/**
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* Pans the camera to the specified location in the specified amount of time.
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*/
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public class PanPath extends CameraPath
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{
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/**
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* Creates a panning path for the specified camera that will retain the
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* camera's current orientation.
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*
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* @param target the target position for the camera.
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* @param duration the number of seconds in which to pan the camera.
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*/
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public PanPath (CameraHandler camhand, Vector3f target, float duration)
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{
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this(camhand, target, null, duration);
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}
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/**
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* Creates a panning path for the specified camera.
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*
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* @param target the target position for the camera.
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* @param trot the target rotation for the camera (or <code>null</code> to
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* keep its current orientation)
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* @param duration the number of seconds in which to pan the camera.
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*/
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public PanPath (CameraHandler camhand, Vector3f target, Quaternion trot,
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float duration)
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{
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super(camhand);
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Camera cam = camhand.getCamera();
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_start = new Vector3f(cam.getLocation());
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_velocity = target.subtract(_start);
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_velocity.divideLocal(duration);
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if (trot != null) {
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_irot = new Quaternion();
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_irot.fromAxes(cam.getLeft(), cam.getUp(), cam.getDirection());
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_trot = trot;
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}
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_duration = duration;
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}
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// documentation inherited
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public boolean tick (float secondsSince)
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{
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_elapsed = Math.min(_elapsed + secondsSince, _duration);
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_camloc.scaleAdd(_elapsed, _velocity, _start);
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_camhand.setLocation(_camloc);
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if (_irot != null) {
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_camhand.getCamera().setAxes(_axes.slerp(_irot, _trot,
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_elapsed / _duration));
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}
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return (_elapsed >= _duration);
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}
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protected Vector3f _start, _velocity, _camloc = new Vector3f();
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protected Quaternion _irot, _trot, _axes = new Quaternion();
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protected float _elapsed, _duration;
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}
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