mirror of
https://github.com/photonstorm/phaser
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68 lines
1.5 KiB
JavaScript
68 lines
1.5 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2016 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* The Delta component provides access to delta values between the Game Objects current and previous position.
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*
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* @class
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*/
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Phaser.Component.Delta = function () {};
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Phaser.Component.Delta.prototype = {
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/**
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* Returns the delta x value. The difference between world.x now and in the previous frame.
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*
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* The value will be positive if the Game Object has moved to the right or negative if to the left.
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*
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* @property {number} deltaX
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* @readonly
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*/
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deltaX: {
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get: function() {
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return this.world.x - this.previousPosition.x;
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}
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},
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/**
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* Returns the delta y value. The difference between world.y now and in the previous frame.
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*
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* The value will be positive if the Game Object has moved down or negative if up.
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*
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* @property {number} deltaY
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* @readonly
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*/
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deltaY: {
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get: function() {
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return this.world.y - this.previousPosition.y;
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}
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},
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/**
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* Returns the delta z value. The difference between rotation now and in the previous frame.
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*
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* @property {number} deltaZ - The delta value.
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* @readonly
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*/
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deltaZ: {
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get: function() {
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return this.rotation - this.previousRotation;
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}
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}
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};
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