mirror of
https://github.com/Tonejs/Tone.js
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82 lines
No EOL
2.1 KiB
JavaScript
82 lines
No EOL
2.1 KiB
JavaScript
define(["Tone/core/Tone", "Tone/component/Envelope", "Tone/signal/Scale"],
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function(Tone){
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"use strict";
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/**
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* @class An envelope which can be scaled to any range.
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* Useful for applying an envelope to a filter
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*
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* @extends {Tone.Envelope}
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* @constructor
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* @param {Tone.Time|Object} [attack=0.01] the attack time in seconds
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* @param {Tone.Time} [decay=0.1] the decay time in seconds
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* @param {number} [sustain=0.5] a percentage (0-1) of the full amplitude
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* @param {Tone.Time} [release=1] the release time in seconds
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*/
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Tone.ScaledEnvelope = function(){
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//get all of the defaults
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var options = this.optionsObject(arguments, ["attack", "decay", "sustain", "release"], Tone.Envelope.defaults);
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Tone.Envelope.call(this, options);
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options = this.defaultArg(options, Tone.ScaledEnvelope.defaults);
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/**
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* scale the signal to the desired range
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* @type {Tone.Multiply}
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* @private
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*/
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this._scale = this.output = new Tone.Scale(options.min, options.max);
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this._sig.connect(this._scale);
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};
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Tone.extend(Tone.ScaledEnvelope, Tone.Envelope);
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/**
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* the default parameters
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* @static
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*/
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Tone.ScaledEnvelope.defaults = {
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"min" : 0,
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"max" : 1,
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};
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/**
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* set all of the parameters in bulk
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* @param {Object} param the name of member as the key
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* and the value as the value
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*/
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Tone.ScaledEnvelope.prototype.set = function(params){
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if (!this.isUndef(params.min)) this.setMin(params.min);
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if (!this.isUndef(params.max)) this.setMax(params.max);
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Tone.Envelope.prototype.set.call(this, params);
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};
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/**
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* set the envelope max
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* @param {number} max
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*/
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Tone.ScaledEnvelope.prototype.setMax = function(max){
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this._scale.setMax(max);
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};
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/**
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* set the envelope min
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* @param {number} min
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*/
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Tone.ScaledEnvelope.prototype.setMin = function(min){
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this._scale.setMin(min);
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};
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/**
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* clean up
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*/
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Tone.ScaledEnvelope.prototype.dispose = function(){
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Tone.Envelope.prototype.dispose.call(this);
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this._scale.dispose();
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this._scale = null;
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};
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return Tone.ScaledEnvelope;
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}); |