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Point.interpolate - Interpolates the two given Points, based on the f value (between 0 and 1) and returns a new Point.

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photonstorm 2014-04-27 11:16:06 +01:00
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1
README.md
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@ -112,6 +112,7 @@ Version 2.0.4 - "Mos Shirare" - in development
* Point.projectUnit - Project two Points onto a Point of unit length.
* Point.multiplyAdd - Adds two 2D Points together and multiplies the result by the given scalar.
* Point.negative - Creates a negative Point.
* Point.interpolate - Interpolates the two given Points, based on the `f` value (between 0 and 1) and returns a new Point.
### Bug Fixes

18
src/geom/Point.js
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@ -623,6 +623,24 @@ Phaser.Point.multiplyAdd = function (a, b, s, out) {
};
/**
* Interpolates the two given Points, based on the `f` value (between 0 and 1) and returns a new Point.
*
* @method Phaser.Point.interpolate
* @param {Phaser.Point} a - The first Point object.
* @param {Phaser.Point} b - The second Point object.
* @param {number} f - The level of interpolation between the two points. Indicates where the new point will be, along the line between pt1 and pt2. If f=1, pt1 is returned; if f=0, pt2 is returned.
* @param {Phaser.Point} [out] - Optional Point to store the value in, if not supplied a new Point object will be created.
* @return {Phaser.Point} The new Point object.
*/
Phaser.Point.interpolate = function (a, b, f, out) {
if (typeof out === "undefined") { out = new Phaser.Point(); }
return out.setTo(a.x + (b.x - a.x) * f, a.y + (b.y - a.y) * f);
};
/**
* Return a perpendicular vector (90 degrees rotation)
*