Crafty.HashMap

Broad-phase collision detection engine. See background information at

- [N Tutorial B - Broad-Phase Collision](http://www.metanetsoftware.com/technique/tutorialB.html)
- [Broad-Phase Collision Detection with CUDA](http.developer.nvidia.com/GPUGems3/gpugems3_ch32.html)

See Also

Back to top

Crafty.HashMap.constructor

public void Crafty.HashMap([cellsize])

cellsize
the cell size. If omitted, cellsize is 64.

Set cellsize. And create this.map.

Back to top

Crafty.HashMap.key

public Object Crafty.HashMap.key(Object obj)

obj
an Object that has .mbr() or _x, _y, _w and _h.

Get the rectangular region (in terms of the grid, with grid size cellsize), where the object may fall in. This region is determined by the object's bounding box. The cellsize is 64 by default.

See Also