| /* |
| * Copyright (c) 2009-2010 jMonkeyEngine |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * * Neither the name of 'jMonkeyEngine' nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package com.jme3.light; |
| |
| import com.jme3.export.InputCapsule; |
| import com.jme3.export.JmeExporter; |
| import com.jme3.export.JmeImporter; |
| import com.jme3.export.OutputCapsule; |
| import com.jme3.math.Vector3f; |
| import com.jme3.scene.Spatial; |
| import java.io.IOException; |
| |
| /** |
| * <code>DirectionalLight</code> is a light coming from a certain direction in world space. |
| * E.g sun or moon light. |
| * <p> |
| * Directional lights have no specific position in the scene, they always |
| * come from their direction regardless of where an object is placed. |
| */ |
| public class DirectionalLight extends Light { |
| |
| protected Vector3f direction = new Vector3f(0f, -1f, 0f); |
| |
| @Override |
| public void computeLastDistance(Spatial owner) { |
| lastDistance = 0; // directional lights are always closest to their owner |
| } |
| |
| /** |
| * Returns the direction vector of the light. |
| * |
| * @return The direction vector of the light. |
| * |
| * @see DirectionalLight#setDirection(com.jme3.math.Vector3f) |
| */ |
| public Vector3f getDirection() { |
| return direction; |
| } |
| |
| /** |
| * Sets the direction of the light. |
| * <p> |
| * Represents the vector direction the light is coming from. |
| * (1, 0, 0) would represent a directional light coming from the X axis. |
| * |
| * @param dir the direction of the light. |
| */ |
| public void setDirection(Vector3f dir){ |
| direction.set(dir); |
| if (!direction.isUnitVector()) { |
| direction.normalizeLocal(); |
| } |
| } |
| |
| @Override |
| public Type getType() { |
| return Type.Directional; |
| } |
| |
| @Override |
| public void write(JmeExporter ex) throws IOException { |
| super.write(ex); |
| OutputCapsule oc = ex.getCapsule(this); |
| oc.write(direction, "direction", null); |
| } |
| |
| @Override |
| public void read(JmeImporter im) throws IOException { |
| super.read(im); |
| InputCapsule ic = im.getCapsule(this); |
| direction = (Vector3f) ic.readSavable("direction", null); |
| } |
| |
| } |