/**
* Call this function to see if one <code>FlxObject</code> overlaps another.
* Can be called with one object and one group, or two groups, or two objects,
* whatever floats your boat! It will put everything into a quad tree and then
* check for overlaps. For maximum performance try bundling a lot of objects
* together using a <code>FlxGroup</code> (even bundling groups together!)
* NOTE: does NOT take objects' scrollfactor into account.
*
* @param Object1 The first object or group you want to check.
* @param Object2 The second object or group you want to check. If it is the same as the first, flixel knows to just do a comparison within that group.
* @param Callback A function with two <code>FlxObject</code> parameters - e.g. <code>myOverlapFunction(Object1:FlxObject,Object2:FlxObject);</code> If no function is provided, <code>FlxQuadTree</code> will call <code>kill()</code> on both objects.
*/
static public bool overlap(FlxObject Object1, FlxObject Object2, SpriteCollisionEvent Callback)
{
if ((Object1 == null) || !Object1.exists ||
(Object2 == null) || !Object2.exists)
{
return(false);
}
quadTree = new FlxQuadTree(FlxQuadTree.bounds.x, FlxQuadTree.bounds.y, FlxQuadTree.bounds.width, FlxQuadTree.bounds.height, null);
quadTree.add(Object1, FlxQuadTree.A_LIST);
if (Object1 == Object2)
{
return(quadTree.overlap(false, Callback));
}
quadTree.add(Object2, FlxQuadTree.B_LIST);
return(quadTree.overlap(true, Callback));
}
/**
* Call this function to see if one <code>FlxObject</code> overlaps another.
* Can be called with one object and one group, or two groups, or two objects,
* whatever floats your boat! It will put everything into a quad tree and then
* check for overlaps. For maximum performance try bundling a lot of objects
* together using a <code>FlxGroup</code> (even bundling groups together!)
* NOTE: does NOT take objects' scrollfactor into account.
*
* @param Object1 The first object or group you want to check.
* @param Object2 The second object or group you want to check. If it is the same as the first, flixel knows to just do a comparison within that group.
* @param Callback A function with two <code>FlxObject</code> parameters - e.g. <code>myOverlapFunction(Object1:FlxObject,Object2:FlxObject);</code> If no function is provided, <code>FlxQuadTree</code> will call <code>kill()</code> on both objects.
*/
public static bool overlap(FlxObject Object1, FlxObject Object2, SpriteCollisionEvent Callback)
{
if( (Object1 == null) || !Object1.exists ||
(Object2 == null) || !Object2.exists )
return false;
quadTree = new FlxQuadTree(FlxQuadTree.bounds.x,FlxQuadTree.bounds.y,FlxQuadTree.bounds.width,FlxQuadTree.bounds.height, null);
quadTree.add(Object1,FlxQuadTree.A_LIST);
if(Object1 == Object2)
return quadTree.overlap(false,Callback);
quadTree.add(Object2,FlxQuadTree.B_LIST);
return quadTree.overlap(true,Callback);
}
/**
* <code>FlxQuadTree</code>'s other main function. Call this after adding objects
* using <code>FlxQuadTree.add()</code> to compare the objects that you loaded.
*
* @param BothLists Whether you are doing an A-B list comparison, or comparing A against itself.
* @param Callback A function with two <code>FlxObject</code> parameters - e.g. <code>myOverlapFunction(Object1:FlxObject,Object2:FlxObject);</code> If no function is provided, <code>FlxQuadTree</code> will call <code>kill()</code> on both objects.
*
* @return Whether or not any overlaps were found.
*/
public bool overlap(bool BothLists, SpriteCollisionEvent Callback)
{
_oc = Callback;
bool c = false;
FlxList itr;
if (BothLists)
{
//An A-B list comparison
_oa = B_LIST;
if (_headA.@object != null)
{
itr = _headA;
while (itr != null)
{
_o = itr.@object;
if (_o.exists && _o.solid && overlapNode())
{
c = true;
}
itr = itr.next;
}
}
_oa = A_LIST;
if (_headB.@object != null)
{
itr = _headB;
while (itr != null)
{
_o = itr.@object;
if (_o.exists && _o.solid)
{
if ((_nw != null) && _nw.overlapNode())
{
c = true;
}
if ((_ne != null) && _ne.overlapNode())
{
c = true;
}
if ((_se != null) && _se.overlapNode())
{
c = true;
}
if ((_sw != null) && _sw.overlapNode())
{
c = true;
}
}
itr = itr.next;
}
}
}
else
{
//Just checking the A list against itself
if (_headA.@object != null)
{
itr = _headA;
while (itr != null)
{
_o = itr.@object;
if (_o.exists && _o.solid && overlapNode(itr.next))
{
c = true;
}
itr = itr.next;
}
}
}
//Advance through the tree by calling overlap on each child
if ((_nw != null) && _nw.overlap(BothLists, _oc))
{
c = true;
}
if ((_ne != null) && _ne.overlap(BothLists, _oc))
{
c = true;
}
if ((_se != null) && _se.overlap(BothLists, _oc))
{
c = true;
}
if ((_sw != null) && _sw.overlap(BothLists, _oc))
{
c = true;
}
return(c);
}
/**
* <code>FlxQuadTree</code>'s other main function. Call this after adding objects
* using <code>FlxQuadTree.add()</code> to compare the objects that you loaded.
*
* @param BothLists Whether you are doing an A-B list comparison, or comparing A against itself.
* @param Callback A function with two <code>FlxObject</code> parameters - e.g. <code>myOverlapFunction(Object1:FlxObject,Object2:FlxObject);</code> If no function is provided, <code>FlxQuadTree</code> will call <code>kill()</code> on both objects.
*
* @return Whether or not any overlaps were found.
*/
public bool overlap(bool BothLists, SpriteCollisionEvent Callback)
{
_oc = Callback;
bool c = false;
FlxList itr;
if(BothLists)
{
//An A-B list comparison
_oa = B_LIST;
if(_headA.@object != null)
{
itr = _headA;
while(itr != null)
{
_o = itr.@object;
if(_o.exists && _o.solid && overlapNode())
c = true;
itr = itr.next;
}
}
_oa = A_LIST;
if(_headB.@object != null)
{
itr = _headB;
while(itr != null)
{
_o = itr.@object;
if(_o.exists && _o.solid)
{
if((_nw != null) && _nw.overlapNode())
c = true;
if((_ne != null) && _ne.overlapNode())
c = true;
if((_se != null) && _se.overlapNode())
c = true;
if((_sw != null) && _sw.overlapNode())
c = true;
}
itr = itr.next;
}
}
}
else
{
//Just checking the A list against itself
if(_headA.@object != null)
{
itr = _headA;
while(itr != null)
{
_o = itr.@object;
if(_o.exists && _o.solid && overlapNode(itr.next))
c = true;
itr = itr.next;
}
}
}
//Advance through the tree by calling overlap on each child
if((_nw != null) && _nw.overlap(BothLists,_oc))
c = true;
if((_ne != null) && _ne.overlap(BothLists,_oc))
c = true;
if((_se != null) && _se.overlap(BothLists,_oc))
c = true;
if((_sw != null) && _sw.overlap(BothLists,_oc))
c = true;
return c;
}
