odin/src/odin/core/components/particle_system/particle_2d.js

Node.js Canvas/WebGL Javascript Game Framework

if (typeof define !== "function") {
    var define = require("amdefine")(module);
}
define([
        "odin/math/vec2",
        "odin/math/color"
    ],
    function(Vec2, Color) {
        "use strict";


        function Particle2D() {

            this.alpha = 1;

            this.lifeTime = 0;
            this.life = 1;

            this.size = 1;

            this.color = new Color;

            this.position = new Vec2;
            this.velocity = new Vec2;
            this.acceleration = new Vec2;

            this.angle = 0;
            this.angularVelocity = 0;
            this.angularAcceleration = 0;
        }


        Particle2D.prototype.update = function(dt) {
            var pos = this.position,
                vel = this.velocity,
                acc = this.acceleration;

            pos.x += vel.x * dt;
            pos.y += vel.y * dt;

            vel.x += acc.x * dt;
            vel.y += acc.y * dt;

            this.angle += this.angularVelocity * dt;
            this.angularVelocity += this.angularAcceleration * dt;

            this.lifeTime += dt;
        };


        return Particle2D;
    }
);