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/*
* Java port of Bullet (c) 2008 Martin Dvorak <jezek2@advel.cz>
*
* Bullet Continuous Collision Detection and Physics Library
* Copyright (c) 2003-2007 Erwin Coumans http://continuousphysics.com/Bullet/
*
* This software is provided 'as-is', without any express or implied warranty.
* In no event will the authors be held liable for any damages arising from
* the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
package javabullet.collision.broadphase;
import java.util.Collection;
import java.util.Iterator;
import javabullet.BulletGlobals;
import javabullet.BulletPool;
import javabullet.ObjectPool;
import javabullet.util.HashUtil;
import javabullet.util.HashUtil.IMap;
import javabullet.util.HashUtil.IObjectProcedure;
/**
*
* @author jezek2
*/
public class OverlappingPairCache {
private final ObjectPool<BroadphasePair> pairsPool = BulletPool.get(BroadphasePair.class);
private final IMap<BroadphasePair,BroadphasePair> overlappingPairs = HashUtil.createMap();
private OverlapFilterCallback overlapFilterCallback;
public OverlappingPairCache() {
}
/**
* Add a pair and return the new pair. If the pair already exists,
* no new pair is created and the old one is returned.
*/
public BroadphasePair addOverlappingPair(BroadphaseProxy proxy0, BroadphaseProxy proxy1) {
BulletGlobals.gAddedPairs++;
if (!needsBroadphaseCollision(proxy0, proxy1)) {
return null;
}
BroadphasePair pair = pairsPool.get();
pair.set(proxy0, proxy1);
BroadphasePair old = overlappingPairs.get(pair);
if (old != null) {
pairsPool.release(pair);
return old;
}
overlappingPairs.put(pair, pair);
return pair;
}
public Object removeOverlappingPair(BroadphaseProxy proxy0, BroadphaseProxy proxy1, Dispatcher dispatcher) {
BulletGlobals.gRemovePairs++;
BroadphasePair key = pairsPool.get();
key.set(proxy0, proxy1);
BroadphasePair pair = overlappingPairs.remove(key);
pairsPool.release(key);
if (pair == null) {
return null;
}
cleanOverlappingPair(pair, dispatcher);
pairsPool.release(pair);
return pair.userInfo;
}
public boolean needsBroadphaseCollision(BroadphaseProxy proxy0, BroadphaseProxy proxy1) {
if (overlapFilterCallback != null) {
return overlapFilterCallback.needBroadphaseCollision(proxy0, proxy1);
}
boolean collides = (proxy0.collisionFilterGroup & proxy1.collisionFilterMask) != 0;
collides = collides && (proxy1.collisionFilterGroup & proxy0.collisionFilterMask) != 0;
return collides;
}
private class ProcessAllOverlappingPairsCallback implements IObjectProcedure<BroadphasePair> {
public OverlapCallback callback;
public Dispatcher dispatcher;
public boolean execute(BroadphasePair pair) {
if (callback.processOverlap(pair)) {
//removeOverlappingPair(pair.pProxy0, pair.pProxy1, dispatcher);
cleanOverlappingPair(pair, dispatcher);
BulletGlobals.gRemovePairs++;
BulletGlobals.gOverlappingPairs--;
pairsPool.release(pair);
return false;
}
return true;
}
}
private ProcessAllOverlappingPairsCallback processAllOverlappingPairsCallback = new ProcessAllOverlappingPairsCallback();
public void processAllOverlappingPairs(OverlapCallback callback, Dispatcher dispatcher) {
processAllOverlappingPairsCallback.callback = callback;
processAllOverlappingPairsCallback.dispatcher = dispatcher;
overlappingPairs.retainEntries(processAllOverlappingPairsCallback);
}
public void removeOverlappingPairsContainingProxy(BroadphaseProxy proxy, Dispatcher dispatcher) {
processAllOverlappingPairs(new RemovePairCallback(proxy), dispatcher);
}
public void cleanProxyFromPairs(BroadphaseProxy proxy, Dispatcher dispatcher) {
processAllOverlappingPairs(new CleanPairCallback(proxy, this, dispatcher), dispatcher);
}
public IMap<BroadphasePair,BroadphasePair> getOverlappingPairArray() {
return overlappingPairs;
}
public void cleanOverlappingPair(BroadphasePair pair, Dispatcher dispatcher) {
if (pair.algorithm != null) {
pair.algorithm.destroy();
// TODO: dispatcher.freeCollisionAlgorithm(pair.m_algorithm);
pair.algorithm = null;
}
}
public BroadphasePair findPair(BroadphaseProxy proxy0, BroadphaseProxy proxy1) {
BulletGlobals.gFindPairs++;
BroadphasePair key = pairsPool.get();
key.set(proxy0, proxy1);
BroadphasePair value = overlappingPairs.get(key);
pairsPool.release(key);
return value;
}
public int getCount() {
return overlappingPairs.size();
}
// btBroadphasePair* GetPairs() { return m_pairs; }
public OverlapFilterCallback getOverlapFilterCallback() {
return overlapFilterCallback;
}
public void setOverlapFilterCallback(OverlapFilterCallback overlapFilterCallback) {
this.overlapFilterCallback = overlapFilterCallback;
}
public int getNumOverlappingPairs() {
return overlappingPairs.size();
}
////////////////////////////////////////////////////////////////////////////
private static class RemovePairCallback implements OverlapCallback {
private BroadphaseProxy obsoleteProxy;
public RemovePairCallback(BroadphaseProxy obsoleteProxy) {
this.obsoleteProxy = obsoleteProxy;
}
public boolean processOverlap(BroadphasePair pair) {
return ((pair.pProxy0 == obsoleteProxy) ||
(pair.pProxy1 == obsoleteProxy));
}
}
private static class CleanPairCallback implements OverlapCallback {
private BroadphaseProxy cleanProxy;
private OverlappingPairCache pairCache;
private Dispatcher dispatcher;
public CleanPairCallback(BroadphaseProxy cleanProxy, OverlappingPairCache pairCache, Dispatcher dispatcher) {
this.cleanProxy = cleanProxy;
this.pairCache = pairCache;
this.dispatcher = dispatcher;
}
public boolean processOverlap(BroadphasePair pair) {
if ((pair.pProxy0 == cleanProxy) ||
(pair.pProxy1 == cleanProxy)) {
pairCache.cleanOverlappingPair(pair, dispatcher);
}
return false;
}
}
}
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