all files / src/particle/ Particle.js

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import Vector3 from '../math/Vector3';
import glMatrix from '../dep/glmatrix';
var vec3 = glMatrix.vec3;
 
/**
 * @constructor
 * @alias clay.particle.Particle
 */
var Particle = function() {
    /**
     * @type {clay.Vector3}
     */
    this.position = new Vector3();
 
    /**
     * Use euler angle to represent particle rotation
     * @type {clay.Vector3}
     */
    this.rotation = new Vector3();
 
    /**
     * @type {?clay.Vector3}
     */
    this.velocity = null;
 
    /**
     * @type {?clay.Vector3}
     */
    this.angularVelocity = null;
 
    /**
     * @type {number}
     */
    this.life = 1;
 
    /**
     * @type {number}
     */
    this.age = 0;
 
    /**
     * @type {number}
     */
    this.spriteSize = 1;
 
    /**
     * @type {number}
     */
    this.weight = 1;
 
    /**
     * @type {clay.particle.Emitter}
     */
    this.emitter = null;
};
 
/**
 * Update particle position
 * @param  {number} deltaTime
 */
Particle.prototype.update = function(deltaTime) {
    if (this.velocity) {
        vec3.scaleAndAdd(this.position.array, this.position.array, this.velocity.array, deltaTime);
    }
    if (this.angularVelocity) {
        vec3.scaleAndAdd(this.rotation.array, this.rotation.array, this.angularVelocity.array, deltaTime);
    }
};
 
export default Particle;