/*
* 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
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.effect.influencers;
import com.jme3.effect.Particle;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.math.FastMath;
import com.jme3.math.Vector3f;
import java.io.IOException;
/**
* an influencer to make blasts expanding on the ground. can be used for various other things
* @author Nehon
*/
public class RadialParticleInfluencer extends DefaultParticleInfluencer {
private float radialVelocity = 0f;
private Vector3f origin = new Vector3f(0, 0, 0);
private boolean horizontal = false;
/**
* This method applies the variation to the particle with already set velocity.
* @param particle
* the particle to be affected
*/
@Override
protected void applyVelocityVariation(Particle particle) {
particle.velocity.set(initialVelocity);
temp.set(particle.position).subtractLocal(origin).normalizeLocal().multLocal(radialVelocity);
if (horizontal) {
temp.y = 0;
}
particle.velocity.addLocal(temp);
temp.set(FastMath.nextRandomFloat(), FastMath.nextRandomFloat(), FastMath.nextRandomFloat());
temp.multLocal(2f);
temp.subtractLocal(1f, 1f, 1f);
temp.multLocal(initialVelocity.length());
particle.velocity.interpolateLocal(temp, velocityVariation);
}
/**
* the origin used for computing the radial velocity direction
* @return the origin
*/
public Vector3f getOrigin() {
return origin;
}
/**
* the origin used for computing the radial velocity direction
* @param origin
*/
public void setOrigin(Vector3f origin) {
this.origin = origin;
}
/**
* the radial velocity
* @return radialVelocity
*/
public float getRadialVelocity() {
return radialVelocity;
}
/**
* the radial velocity
* @param radialVelocity
*/
public void setRadialVelocity(float radialVelocity) {
this.radialVelocity = radialVelocity;
}
/**
* nullify y component of particle velocity to make the effect expand only on x and z axis
* @return
*/
public boolean isHorizontal() {
return horizontal;
}
/**
* nullify y component of particle velocity to make the effect expand only on x and z axis
* @param horizontal
*/
public void setHorizontal(boolean horizontal) {
this.horizontal = horizontal;
}
@Override
public void write(JmeExporter ex) throws IOException {
super.write(ex);
OutputCapsule oc = ex.getCapsule(this);
oc.write(radialVelocity, "radialVelocity", 0f);
oc.write(origin, "origin", new Vector3f());
oc.write(horizontal, "horizontal", false);
}
@Override
public void read(JmeImporter im) throws IOException {
super.read(im);
InputCapsule ic = im.getCapsule(this);
radialVelocity = ic.readFloat("radialVelocity", 0f);
origin = (Vector3f) ic.readSavable("origin", new Vector3f());
horizontal = ic.readBoolean("horizontal", false);
}
}