Crafty.HashMap Class

src/spatial/spatial-grid.js#L8-L18

Broad-phase collision detection engine. See background information at

Properties

.constructor

Methods

.key()

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Crafty.HashMap.constructor

src/spatial/spatial-grid.js#L23-L33

public void Crafty.HashMap([cellsize])

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

Set cellsize. And create this.map.

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Crafty.HashMap.key()

src/spatial/spatial-grid.js#L54-L68

public Object Crafty.HashMap.key(Object obj[, Object keys])

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

[keys]: optional object to reuse for the saving result in

[Returns]: an object describing the region in grid cells the given object is located in - { x1: start col index, y1: start row index, x2: end col index, y2: end row index}

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.