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Merge pull request #1199 from codevinsky/feature/rectangle-aabb

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Rectangle.aabb
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Richard Davey 2014-09-19 13:50:14 +01:00
commit 49ddf46ef3
1 changed files with 45 additions and 4 deletions
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49
src/geom/Rectangle.js
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@ -96,7 +96,7 @@ Phaser.Rectangle.prototype = {
/**
* Centers this Rectangle so that the center coordinates match the given x and y values.
*
*
* @method Phaser.Rectangle#centerOn
* @param {number} x - The x coordinate to place the center of the Rectangle at.
* @param {number} y - The y coordinate to place the center of the Rectangle at.
@ -269,7 +269,7 @@ Phaser.Rectangle.prototype = {
/**
* Determines whether the coordinates given intersects (overlaps) with this Rectangle.
*
*
* @method Phaser.Rectangle#intersectsRaw
* @param {number} left - The x coordinate of the left of the area.
* @param {number} right - The right coordinate of the area.
@ -482,7 +482,7 @@ Object.defineProperty(Phaser.Rectangle.prototype, "centerY", {
/**
* A random value between the left and right values (inclusive) of the Rectangle.
*
*
* @name Phaser.Rectangle#randomX
* @property {number} randomX - A random value between the left and right values (inclusive) of the Rectangle.
*/
@ -498,7 +498,7 @@ Object.defineProperty(Phaser.Rectangle.prototype, "randomX", {
/**
* A random value between the top and bottom values (inclusive) of the Rectangle.
*
*
* @name Phaser.Rectangle#randomY
* @property {number} randomY - A random value between the top and bottom values (inclusive) of the Rectangle.
*/
@ -838,6 +838,47 @@ Phaser.Rectangle.union = function (a, b, output) {
};
/**
* Calculates the Axis Aligned Bounding Box (or aabb) from an array of points.
*
* @method Phaser.Rectangle#aabb
* @param {Phaser.Point[]} points - The array of one or more points.
* @param {Phaser.Rectangle} [out] - Optional Rectangle to store the value in, if not supplied a new Rectangle object will be created.
* @return {Phaser.Rectangle} The new Rectangle object.
* @static
*/
Phaser.Rectangle.aabb = function(points, out) {
if (typeof out === "undefined") {
out = new Phaser.Rectangle();
}
var xMax = Number.MIN_VALUE,
xMin = Number.MAX_VALUE,
yMax = Number.MIN_VALUE,
yMin = Number.MAX_VALUE;
points.forEach(function(point) {
if (point.x > xMax) {
xMax = point.x;
}
if (point.x < xMin) {
xMin = point.x;
}
if (point.y > yMax) {
yMax = point.y;
}
if (point.y < yMin) {
yMin = point.y;
}
});
out.setTo(xMin, yMin, xMax - xMin, yMax - yMin);
return out;
};
// Because PIXI uses its own Rectangle, we'll replace it with ours to avoid duplicating code or confusion.
PIXI.Rectangle = Phaser.Rectangle;
PIXI.EmptyRectangle = new Phaser.Rectangle(0, 0, 0, 0);