/**
* Get all the entities who are touching this entity
*
* @param dest A list to store the entities in, or null, to construct a new one
* @return dest, or a new List if dest was null
*/
public final List<Entity> checkCollisions(List<Entity> dest) {
if (node != null) {
return node.checkCollisions(this, dest);
} else {
// Haven't got a node in the quadtree. Use the root
assert false : this + " is not in the quadtree!";
return COLLISIONMANAGER.checkCollisions(this, dest);
}
}
/** Add this entity to the collision manager */
protected final void addToCollisionManager() {
if (node != null) {
if (!node.remove(this)) {
assert false : "Entity " + this + " was not found!";
}
}
node = COLLISIONMANAGER.add(this);
if (node == null) {
node = COLLISIONMANAGER;
COLLISIONMANAGER.store(this);
}
}
/** Tick. Called every frame if this entity is alive. */
@Override
public final void tick() {
try {
doTick();
float newR = getRadius();
if (node != null) {
if (canCollide() && isActive()) {
// If we've changed radius, remove and re-add to the quadtree
if (oldR != newR) {
oldR = newR;
addToCollisionManager();
}
} else {
// Can't collide any more - remove from quadtree
node.remove(this);
node = null;
}
} else {
if (canCollide() && isActive()) {
// Add us in to the quadtree
addToCollisionManager();
}
}
} catch (Exception e) {
System.err.println("Error ticking " + this);
e.printStackTrace(System.err);
remove();
}
}
/** Remove the entity */
@Override
public final void remove() {
removeSprites();
if (!active) {
// Already removed
return;
}
active = false;
Worm.getGameState().removeEntity(this);
if (node != null) {
node.remove(this);
node = null;
}
doRemove();
}
/**
* Find out which entities are touching the specified rectangle
*
* @param rect
* @param dest
* @return
*/
public static List<Entity> getCollisions(ReadableRectangle rect, List<Entity> dest) {
return COLLISIONMANAGER.checkCollisions(rect, dest);
}
public static void reset() {
COLLISIONMANAGER.clear();
}
/** Process collisions */
public static void checkCollisions() {
COLLISIONMANAGER.checkCollisions();
}