/*
* Copyright (c) 2009-2012 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.shadow;
import com.jme3.asset.AssetManager;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.light.PointLight;
import com.jme3.material.Material;
import com.jme3.math.Vector3f;
import com.jme3.renderer.Camera;
import com.jme3.renderer.queue.GeometryList;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import java.io.IOException;
/**
* PointLightShadowRenderer renders shadows for a point light
*
* @author Rémy Bouquet aka Nehon
*/
public class PointLightShadowRenderer extends AbstractShadowRenderer {
public static final int CAM_NUMBER = 6;
protected PointLight light;
protected Camera[] shadowCams;
private Geometry[] frustums = null;
/**
* Used for serialization use
* PointLightShadowRenderer"PointLightShadowRenderer(AssetManager
* assetManager, int shadowMapSize)
*/
public PointLightShadowRenderer() {
super();
}
/**
* Creates a PointLightShadowRenderer
*
* @param assetManager the application asset manager
* @param shadowMapSize the size of the rendered shadowmaps (512,1024,2048,
* etc...)
*/
public PointLightShadowRenderer(AssetManager assetManager, int shadowMapSize) {
super(assetManager, shadowMapSize, CAM_NUMBER);
init(shadowMapSize);
}
private void init(int shadowMapSize) {
shadowCams = new Camera[CAM_NUMBER];
for (int i = 0; i < CAM_NUMBER; i++) {
shadowCams[i] = new Camera(shadowMapSize, shadowMapSize);
}
}
@Override
protected void updateShadowCams(Camera viewCam) {
if (light == null) {
throw new IllegalStateException("The light can't be null for a " + this.getClass().getName());
}
//bottom
shadowCams[0].setAxes(Vector3f.UNIT_X.mult(-1f), Vector3f.UNIT_Z.mult(-1f), Vector3f.UNIT_Y.mult(-1f));
//top
shadowCams[1].setAxes(Vector3f.UNIT_X.mult(-1f), Vector3f.UNIT_Z, Vector3f.UNIT_Y);
//forward
shadowCams[2].setAxes(Vector3f.UNIT_X.mult(-1f), Vector3f.UNIT_Y, Vector3f.UNIT_Z.mult(-1f));
//backward
shadowCams[3].setAxes(Vector3f.UNIT_X, Vector3f.UNIT_Y, Vector3f.UNIT_Z);
//left
shadowCams[4].setAxes(Vector3f.UNIT_Z, Vector3f.UNIT_Y, Vector3f.UNIT_X.mult(-1f));
//right
shadowCams[5].setAxes(Vector3f.UNIT_Z.mult(-1f), Vector3f.UNIT_Y, Vector3f.UNIT_X);
for (int i = 0; i < CAM_NUMBER; i++) {
shadowCams[i].setFrustumPerspective(90f, 1f, 0.1f, light.getRadius());
shadowCams[i].setLocation(light.getPosition());
shadowCams[i].update();
shadowCams[i].updateViewProjection();
}
}
@Override
protected GeometryList getOccludersToRender(int shadowMapIndex, GeometryList sceneOccluders, GeometryList sceneReceivers, GeometryList shadowMapOccluders) {
ShadowUtil.getGeometriesInCamFrustum(sceneOccluders, shadowCams[shadowMapIndex], shadowMapOccluders);
return shadowMapOccluders;
}
@Override
GeometryList getReceivers(GeometryList sceneReceivers, GeometryList lightReceivers) {
lightReceivers.clear();
ShadowUtil.getGeometriesInLightRadius(sceneReceivers, shadowCams, lightReceivers);
return lightReceivers;
}
@Override
protected Camera getShadowCam(int shadowMapIndex) {
return shadowCams[shadowMapIndex];
}
@Override
protected void doDisplayFrustumDebug(int shadowMapIndex) {
if (frustums == null) {
frustums = new Geometry[CAM_NUMBER];
Vector3f[] points = new Vector3f[8];
for (int i = 0; i < 8; i++) {
points[i] = new Vector3f();
}
for (int i = 0; i < CAM_NUMBER; i++) {
ShadowUtil.updateFrustumPoints2(shadowCams[i], points);
frustums[i] = createFrustum(points, i);
}
}
if (frustums[shadowMapIndex].getParent() == null) {
((Node) viewPort.getScenes().get(0)).attachChild(frustums[shadowMapIndex]);
}
}
@Override
protected void setMaterialParameters(Material material) {
material.setVector3("LightPos", light.getPosition());
}
/**
* gets the point light used to cast shadows with this processor
*
* @return the point light
*/
public PointLight getLight() {
return light;
}
/**
* sets the light to use for casting shadows with this processor
*
* @param light the point light
*/
public void setLight(PointLight light) {
this.light = light;
}
@Override
public void read(JmeImporter im) throws IOException {
super.read(im);
InputCapsule ic = (InputCapsule) im.getCapsule(this);
light = (PointLight) ic.readSavable("light", null);
init((int) shadowMapSize);
}
@Override
public void write(JmeExporter ex) throws IOException {
super.write(ex);
OutputCapsule oc = (OutputCapsule) ex.getCapsule(this);
oc.write(light, "light", null);
}
}