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/*
* 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.collision;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
/**
* <code>CollisionResults</code> is a collection returned as a result of a
* collision detection operation done by {@link Collidable}.
*
* @author Kirill Vainer
*/
public class CollisionResults implements Iterable<CollisionResult> {
private final ArrayList<CollisionResult> results = new ArrayList<CollisionResult>();
private boolean sorted = true;
/**
* Clears all collision results added to this list
*/
public void clear(){
results.clear();
}
/**
* Iterator for iterating over the collision results.
*
* @return the iterator
*/
public Iterator<CollisionResult> iterator() {
if (!sorted){
Collections.sort(results);
sorted = true;
}
return results.iterator();
}
public void addCollision(CollisionResult result){
results.add(result);
sorted = false;
}
public int size(){
return results.size();
}
public CollisionResult getClosestCollision(){
if (size() == 0)
return null;
if (!sorted){
Collections.sort(results);
sorted = true;
}
return results.get(0);
}
public CollisionResult getFarthestCollision(){
if (size() == 0)
return null;
if (!sorted){
Collections.sort(results);
sorted = true;
}
return results.get(size()-1);
}
public CollisionResult getCollision(int index){
if (!sorted){
Collections.sort(results);
sorted = true;
}
return results.get(index);
}
/**
* Internal use only.
* @param index
* @return
*/
public CollisionResult getCollisionDirect(int index){
return results.get(index);
}
@Override
public String toString(){
StringBuilder sb = new StringBuilder();
sb.append("CollisionResults[");
for (CollisionResult result : results){
sb.append(result).append(", ");
}
if (results.size() > 0)
sb.setLength(sb.length()-2);
sb.append("]");
return sb.toString();
}
}
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