proton-engine/src/emitter/BehaviourEmitter.js

Proton is a simple and powerful javascript particle animation engine.

import Emitter from "./Emitter";

export default class BehaviourEmitter extends Emitter {
  /**
   * The BehaviourEmitter class inherits from Proton.Emitter
   *
   * use the BehaviourEmitter you can add behaviours to self;
   * @class Proton.BehaviourEmitter
   * @constructor
   * @param {Object} conf the parameters object;
   */
  constructor(conf) {
    super(conf);

    this.selfBehaviours = [];
  }

  /**
   * add the Behaviour to emitter;
   *
   * you can use Behaviours array:emitter.addSelfBehaviour(Behaviour1,Behaviour2,Behaviour3);
   * @method addSelfBehaviour
   * @param {Proton.Behaviour} behaviour like this new Proton.Color('random')
   */
  addSelfBehaviour(...rest) {
    let i,
      length = rest.length;

    for (i = 0; i < length; i++) {
      let behaviour = rest[i];
      this.selfBehaviours.push(behaviour);
      behaviour.initialize(this);
    }
  }

  /**
   * remove the Behaviour for self
   * @method removeSelfBehaviour
   * @param {Proton.Behaviour} behaviour a behaviour
   */
  removeSelfBehaviour(behaviour) {
    const index = this.selfBehaviours.indexOf(behaviour);
    if (index > -1) this.selfBehaviours.splice(index, 1);
  }

  update(time) {
    super.update(time);

    if (!this.sleep) {
      const length = this.selfBehaviours.length;
      let i;

      for (i = 0; i < length; i++) {
        this.selfBehaviours[i].applyBehaviour(this, time, i);
      }
    }
  }
}