mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-16 00:27:58 +00:00
ed71d8141b
no longer using AMD (require.js) style imports, and beginning to move to es6 "import/export" statements everywhere.
113 lines
2.3 KiB
JavaScript
113 lines
2.3 KiB
JavaScript
import Tone from "../core/Tone";
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import "../signal/Add";
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import "../signal/Multiply";
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import "../signal/Signal";
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/**
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* @class Performs a linear scaling on an input signal.
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* Scales a NormalRange input to between
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* outputMin and outputMax.
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*
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* @constructor
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* @extends {Tone.SignalBase}
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* @param {number} [outputMin=0] The output value when the input is 0.
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* @param {number} [outputMax=1] The output value when the input is 1.
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* @example
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* var scale = new Tone.Scale(50, 100);
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* var signal = new Tone.Signal(0.5).connect(scale);
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* //the output of scale equals 75
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*/
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Tone.Scale = function(outputMin, outputMax){
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Tone.SignalBase.call(this);
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/**
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* @private
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* @type {number}
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*/
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this._outputMin = Tone.defaultArg(outputMin, 0);
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/**
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* @private
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* @type {number}
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*/
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this._outputMax = Tone.defaultArg(outputMax, 1);
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/**
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* @private
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* @type {Tone.Multiply}
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* @private
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*/
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this._scale = this.input = new Tone.Multiply(1);
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/**
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* @private
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* @type {Tone.Add}
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* @private
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*/
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this._add = this.output = new Tone.Add(0);
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this._scale.connect(this._add);
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this._setRange();
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};
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Tone.extend(Tone.Scale, Tone.SignalBase);
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/**
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* The minimum output value. This number is output when
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* the value input value is 0.
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* @memberOf Tone.Scale#
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* @type {number}
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* @name min
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*/
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Object.defineProperty(Tone.Scale.prototype, "min", {
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get : function(){
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return this._outputMin;
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},
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set : function(min){
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this._outputMin = min;
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this._setRange();
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}
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});
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/**
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* The maximum output value. This number is output when
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* the value input value is 1.
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* @memberOf Tone.Scale#
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* @type {number}
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* @name max
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*/
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Object.defineProperty(Tone.Scale.prototype, "max", {
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get : function(){
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return this._outputMax;
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},
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set : function(max){
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this._outputMax = max;
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this._setRange();
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}
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});
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/**
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* set the values
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* @private
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*/
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Tone.Scale.prototype._setRange = function(){
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this._add.value = this._outputMin;
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this._scale.value = this._outputMax - this._outputMin;
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};
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/**
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* Clean up.
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* @returns {Tone.Scale} this
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*/
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Tone.Scale.prototype.dispose = function(){
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Tone.SignalBase.prototype.dispose.call(this);
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this._add.dispose();
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this._add = null;
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this._scale.dispose();
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this._scale = null;
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return this;
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};
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export default Tone.Scale;
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