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      1 /*
      2  * Copyright (c) 2009-2010 jMonkeyEngine
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  * * Redistributions of source code must retain the above copyright
     10  *   notice, this list of conditions and the following disclaimer.
     11  *
     12  * * Redistributions in binary form must reproduce the above copyright
     13  *   notice, this list of conditions and the following disclaimer in the
     14  *   documentation and/or other materials provided with the distribution.
     15  *
     16  * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
     17  *   may be used to endorse or promote products derived from this software
     18  *   without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 package com.jme3.effect.shapes;
     33 
     34 import com.jme3.export.InputCapsule;
     35 import com.jme3.export.JmeExporter;
     36 import com.jme3.export.JmeImporter;
     37 import com.jme3.export.OutputCapsule;
     38 import com.jme3.math.FastMath;
     39 import com.jme3.math.Vector3f;
     40 import java.io.IOException;
     41 
     42 public class EmitterSphereShape implements EmitterShape {
     43 
     44     private Vector3f center;
     45     private float radius;
     46 
     47     public EmitterSphereShape() {
     48     }
     49 
     50     public EmitterSphereShape(Vector3f center, float radius) {
     51         if (center == null) {
     52             throw new NullPointerException();
     53         }
     54 
     55         if (radius <= 0) {
     56             throw new IllegalArgumentException("Radius must be greater than 0");
     57         }
     58 
     59         this.center = center;
     60         this.radius = radius;
     61     }
     62 
     63     @Override
     64     public EmitterShape deepClone() {
     65         try {
     66             EmitterSphereShape clone = (EmitterSphereShape) super.clone();
     67             clone.center = center.clone();
     68             return clone;
     69         } catch (CloneNotSupportedException ex) {
     70             throw new AssertionError();
     71         }
     72     }
     73 
     74     @Override
     75     public void getRandomPoint(Vector3f store) {
     76         do {
     77             store.x = (FastMath.nextRandomFloat() * 2f - 1f) * radius;
     78             store.y = (FastMath.nextRandomFloat() * 2f - 1f) * radius;
     79             store.z = (FastMath.nextRandomFloat() * 2f - 1f) * radius;
     80         } while (store.distance(center) > radius);
     81     }
     82 
     83     @Override
     84     public void getRandomPointAndNormal(Vector3f store, Vector3f normal) {
     85         this.getRandomPoint(store);
     86     }
     87 
     88     public Vector3f getCenter() {
     89         return center;
     90     }
     91 
     92     public void setCenter(Vector3f center) {
     93         this.center = center;
     94     }
     95 
     96     public float getRadius() {
     97         return radius;
     98     }
     99 
    100     public void setRadius(float radius) {
    101         this.radius = radius;
    102     }
    103 
    104     @Override
    105     public void write(JmeExporter ex) throws IOException {
    106         OutputCapsule oc = ex.getCapsule(this);
    107         oc.write(center, "center", null);
    108         oc.write(radius, "radius", 0);
    109     }
    110 
    111     @Override
    112     public void read(JmeImporter im) throws IOException {
    113         InputCapsule ic = im.getCapsule(this);
    114         center = (Vector3f) ic.readSavable("center", null);
    115         radius = ic.readFloat("radius", 0);
    116     }
    117 }
    118