phaser/Phaser/particles/Emitter.ts

/// <reference path="../_definitions.ts" />

module Phaser.Particles {

    export class Emitter {

        /**
         * You can use this emit particles.
         *
         * It will dispatch follow events:
         * Proton.PARTICLE_CREATED
         * Proton.PARTICLE_UPDATA
         * Proton.PARTICLE_DEAD
         *
         * @class Proton.Emitter
         * @constructor
         * @param {Object} pObj the parameters object;
         * for example {damping:0.01,bindEmitter:false}
         */

        constructor(pObj) {

            this.initializes = [];
            this.particles = [];
            this.behaviours = [];
            this.emitTime = 0;
            this.emitTotalTimes = -1;
            /**
             * The friction coefficient for all particle emit by This;
             * @property damping
             * @type {Number}
             * @default 0.006
             */
            this.damping = .006;
            /**
             * If bindEmitter the particles can bind this emitter's property;
             * @property bindEmitter
             * @type {Boolean}
             * @default true
             */
            this.bindEmitter = true;
            /**
             * The number of particles per second emit (a [particle]/b [s]);
             * @property rate
             * @type {Proton.Rate}
             * @default Proton.Rate(1, .1)
             */
            this.rate = new Phaser.Particles.Initializers.Rate(1, .1);
            //Emitter._super_.call(this, pObj);
            /**
             * The emitter's id;
             * @property id
             * @type {String} id
             */
            this.id = 'emitter_' + Emitter.ID++;
        }

        static ID = 0;
        id;
        initializes = [];
        particles = [];
        behaviours = [];
        emitTime = 0;
        emitTotalTimes = -1;
        damping;
        bindEmitter;
        rate;
        life;
        age;
        dead;
        parent;

        /**
         * start emit particle
         * @method emit
         * @param {Number} emitTime begin emit time;
         * @param {String} life the life of this emitter
         */
        emit(emitTime, life) {
            this.emitTime = 0;
            this.emitTotalTimes = ParticleUtils.initValue(emitTime, Infinity);

            if (life == true || life == 'life' || life == 'destroy')
            {
                if (emitTime == 'once')
                    this.life = 1;
                else
                    this.life = this.emitTotalTimes;

            } else if (!isNaN(life))
            {
                this.life = life;
            }

            this.rate.init();
        }

        /**
         * stop emiting
         * @method stopEmit
         */
        stopEmit() {
            this.emitTotalTimes = -1;
            this.emitTime = 0;
        }

        /**
         * remove current all particles
         * @method removeAllParticles
         */
        removeAllParticles() {
            for (var i = 0; i < this.particles.length; i++)
                this.particles[i].dead = true;
        }

        /**
         * create single particle;
         * 
         * can use emit({x:10},new Gravity(10),{'particleUpdate',fun}) or emit([{x:10},new Initialize],new Gravity(10),{'particleUpdate',fun})
         * @method removeAllParticles
         */
        createParticle(initialize=null, behaviour=null) {
            var particle = ParticleManager.pool.get();
            this.setupParticle(particle, initialize, behaviour);
            //this.dispatchEvent(new Proton.Event({
            //    type: Proton.PARTICLE_CREATED,
            //    particle: particle
            //}));
            return particle;
        }

        /**
         * add initialize to this emitter
         * @method addSelfInitialize
         */
        addSelfInitialize(pObj) {
            if (pObj['init'])
            {
                pObj.init(this);
            } else
            {
                //this.initAll();
            }
        }

        /**
         * add the Initialize to particles;
         * 
         * you can use initializes array:for example emitter.addInitialize(initialize1,initialize2,initialize3);
         * @method addInitialize
         * @param {Proton.Initialize} initialize like this new Proton.Radius(1, 12)
         */
        addInitialize() {
            var length = arguments.length, i;
            for (i = 0; i < length; i++)
            {
                this.initializes.push(arguments[i]);
            }
        }

        /**
         * remove the Initialize
         * @method removeInitialize
         * @param {Proton.Initialize} initialize a initialize
         */
        removeInitialize(initializer) {
            var index = this.initializes.indexOf(initializer);
            if (index > -1)
            {
                this.initializes.splice(index, 1);
            }
        }

        /**
         * remove all Initializes
         * @method removeInitializers
         */
        removeInitializers() {
            ParticleUtils.destroyArray(this.initializes);
        }

        /**
         * add the Behaviour to particles;
         * 
         * you can use Behaviours array:emitter.addBehaviour(Behaviour1,Behaviour2,Behaviour3);
         * @method addBehaviour
         * @param {Proton.Behaviour} behaviour like this new Proton.Color('random')
         */
        addBehaviour() {
            var length = arguments.length, i;
            for (i = 0; i < length; i++)
            {
                this.behaviours.push(arguments[i]);
                if (arguments[i].hasOwnProperty("parents"))
                    arguments[i].parents.push(this);
            }
        }

        /**
         * remove the Behaviour
         * @method removeBehaviour
         * @param {Proton.Behaviour} behaviour a behaviour
         */
        removeBehaviour(behaviour) {
            var index = this.behaviours.indexOf(behaviour);
            if (index > -1)
                this.behaviours.splice(index, 1);
        }

        /**
         * remove all behaviours
         * @method removeAllBehaviours
         */
        removeAllBehaviours() {
            ParticleUtils.destroyArray(this.behaviours);
        }

        integrate(time) {
            var damping = 1 - this.damping;
            ParticleManager.integrator.integrate(this, time, damping);
            var length = this.particles.length, i;
            for (i = 0; i < length; i++)
            {
                var particle = this.particles[i];
                particle.update(time, i);
                ParticleManager.integrator.integrate(particle, time, damping);

                //this.dispatchEvent(new Proton.Event({
                //    type: Proton.PARTICLE_UPDATE,
                //    particle: particle
                //}));
            }
        }

        emitting(time) {
            if (this.emitTotalTimes == 1)
            {
                var length = this.rate.getValue(99999), i;
                for (i = 0; i < length; i++)
                {
                    this.createParticle();
                }

                this.emitTotalTimes = 0;
            } else if (!isNaN(this.emitTotalTimes))
            {
                this.emitTime += time;
                if (this.emitTime < this.emitTotalTimes)
                {
                    var length = this.rate.getValue(time), i;
                    for (i = 0; i < length; i++)
                    {
                        this.createParticle();
                    }
                }
            }
        }


        update(time) {
            this.age += time;
            if (this.age >= this.life || this.dead)
            {
                this.destroy();
            }

            this.emitting(time);
            this.integrate(time);
            var particle;
            var length = this.particles.length, k;
            for (k = length - 1; k >= 0; k--)
            {
                particle = this.particles[k];
                if (particle.dead)
                {
                    ParticleManager.pool.set(particle);
                    this.particles.splice(k, 1);
                    //this.dispatchEvent(new Proton.Event({
                    //    type: Proton.PARTICLE_DEAD,
                    //    particle: particle
                    //}));
                }
            }
        }

        setupParticle(particle, initialize, behaviour) {

            var initializes = this.initializes;
            var behaviours = this.behaviours;

            if (initialize)
            {
                if (initialize instanceof Array)
                    initializes = initialize;
                else
                    initializes = [initialize];
            }

            if (behaviour)
            {
                if (behaviour instanceof Array)
                    behaviours = behaviour;
                else
                    behaviours = [behaviour];
            }

            //Proton.InitializeUtil.initialize(this, particle, initializes);
            particle.addBehaviours(behaviours);
            particle.parent = this;
            this.particles.push(particle);
        }

        /**
         * Destory this Emitter
         * @method destory
         */
        destroy() {
            this.dead = true;
            this.emitTotalTimes = -1;
            if (this.particles.length == 0)
            {
                this.removeInitializers();
                this.removeAllBehaviours();

                if (this.parent)
                    this.parent.removeEmitter(this);
            }
        }


    }

}