initialize/Rate.js

  1. (function(Proton, undefined) {
  2. 	/**
  3. 	 * The number of particles per second emission (a [particle]/b [s]);
  4. 	 * @namespace
  5. 	 * @memberof! Proton#
  6. 	 * @constructor
  7. 	 * @alias Proton.Rate
  8. 	 *
  9. 	 * @param {Array | Number | Proton.Span} numpan the number of each emission;
  10. 	 * @param {Array | Number | Proton.Span} timepan the time of each emission;
  11. 	 * for example: new Proton.Rate(new Proton.Span(10, 20), new Proton.Span(.1, .25));
  12. 	 */
  13. 	function Rate(numpan, timepan) {
  14. 		this.numPan = Proton.Util.initValue(numpan, 1);
  15. 		this.timePan = Proton.Util.initValue(timepan, 1);
  16. 		this.numPan = Proton.Util.setSpanValue(this.numPan);
  17. 		this.timePan = Proton.Util.setSpanValue(this.timePan);
  18. 		this.startTime = 0;
  19. 		this.nextTime = 0;
  20. 		this.init();
  21. 	}
  24. 	Rate.prototype = {
  25. 		/**
  26. 		 * @method init
  27. 		 * @memberof Proton#Proton.Rate
  28. 		 * @instance
  29. 		 */
  30. 		init : function() {
  31. 			this.startTime = 0;
  32. 			this.nextTime = this.timePan.getValue();
  33. 		},
  35. 		getValue : function(time) {
  36. 			this.startTime += time;
  37. 			if (this.startTime >= this.nextTime) {
  38. 				this.startTime = 0;
  39. 				this.nextTime = this.timePan.getValue();
  40. 				if (this.numPan.b == 1) {
  41. 					if (this.numPan.getValue(false) > 0.5)
  42. 						return 1;
  43. 					else
  44. 						return 0;
  45. 				} else {
  46. 					return this.numPan.getValue(true);
  47. 				}
  48. 			}
  49. 			return 0;
  50. 		}
  51. 	}
  53. 	Proton.Rate = Rate;
  54. })(Proton);