phaser
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A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers from the team at Phaser Studio Inc.
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JavaScript
/**
* @author Richard Davey <rich@phaser.io>
* @copyright 2013-2025 Phaser Studio Inc.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var Body = require('../lib/body/Body');
var Vector2 = require('../../../math/Vector2');
/**
* Allows accessing the mass, density, and center of mass of a Matter-enabled Game Object. Should be used as a mixin and not directly.
*
* @namespace Phaser.Physics.Matter.Components.Mass
* @since 3.0.0
*/
var Mass = {
/**
* Sets the mass of the Game Object's Matter Body.
*
* @method Phaser.Physics.Matter.Components.Mass#setMass
* @since 3.0.0
*
* @param {number} value - The new mass of the body.
*
* @return {this} This Game Object instance.
*/
setMass: function (value)
{
Body.setMass(this.body, value);
return this;
},
/**
* Sets density of the body.
*
* @method Phaser.Physics.Matter.Components.Mass#setDensity
* @since 3.0.0
*
* @param {number} value - The new density of the body.
*
* @return {this} This Game Object instance.
*/
setDensity: function (value)
{
Body.setDensity(this.body, value);
return this;
},
/**
* The body's center of mass.
*
* Calling this creates a new `Vector2 each time to avoid mutation.
*
* If you only need to read the value and won't change it, you can get it from `GameObject.body.centerOfMass`.
*
* @name Phaser.Physics.Matter.Components.Mass#centerOfMass
* @type {Phaser.Math.Vector2}
* @readonly
* @since 3.10.0
*
* @return {Phaser.Math.Vector2} The center of mass.
*/
centerOfMass: {
get: function ()
{
return new Vector2(this.body.centerOfMass.x, this.body.centerOfMass.y);
}
}
};
module.exports = Mass;