Class jaws.QuadTree

Class Detail

Parameters:

{jaws.Rect} bounds Optional

The defining bounds of the tree

{number} depth Optional

The current depth of the tree

Method Detail

• clear()
  Moves through the nodes and deletes them.
• {boolean} collide(list1, list2, callback)
  Checks for collisions between objects by creating a quadtree, inserting one or more objects, and then comparing the results of a retrieval against another single or set of objects. With the callback argument, it will call a function and pass the items found colliding as the first and second argument. Without the callback argument, it will return a boolean value if any collisions were found.

  Parameters:

  {object|array} list1

  A single or set of objects with properties x, y, width, and height

  {object|array} list2

  A single or set of objects with properties x, y, width, and height

  {function} callback Optional

  The function to call per collision

  Returns:

  {boolean} If the items (or any within their sets) collide with one another
• insert(pRect)
  Inserts an object into the quadtree, spliting it into new branches if needed

  Parameters:

  {object} pRect

  An object with the properties x, y, width, and height
• {array} retrieve(pRect)
  Returns those objects on the branch matching the position of the passed-in object

  Parameters:

  {object} pRect

  An object with properties x, y, width, and height

  Returns:

  {array} The objects on the same branch as the passed-in object