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.
62 lines
1.3 KiB
JavaScript
62 lines
1.3 KiB
JavaScript
import Tone from "../core/Tone";
|
|
import "../signal/Signal";
|
|
import "../signal/Multiply";
|
|
import "../signal/WaveShaper";
|
|
|
|
/**
|
|
* @class GreaterThanZero outputs 1 when the input is strictly greater than zero
|
|
*
|
|
* @constructor
|
|
* @extends {Tone.SignalBase}
|
|
* @example
|
|
* var gt0 = new Tone.GreaterThanZero();
|
|
* var sig = new Tone.Signal(0.01).connect(gt0);
|
|
* //the output of gt0 is 1.
|
|
* sig.value = 0;
|
|
* //the output of gt0 is 0.
|
|
*/
|
|
Tone.GreaterThanZero = function(){
|
|
|
|
Tone.SignalBase.call(this);
|
|
|
|
/**
|
|
* @type {Tone.WaveShaper}
|
|
* @private
|
|
*/
|
|
this._thresh = this.output = new Tone.WaveShaper(function(val){
|
|
if (val <= 0){
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}, 127);
|
|
|
|
/**
|
|
* scale the first thresholded signal by a large value.
|
|
* this will help with values which are very close to 0
|
|
* @type {Tone.Multiply}
|
|
* @private
|
|
*/
|
|
this._scale = this.input = new Tone.Multiply(10000);
|
|
|
|
//connections
|
|
this._scale.connect(this._thresh);
|
|
};
|
|
|
|
Tone.extend(Tone.GreaterThanZero, Tone.SignalBase);
|
|
|
|
/**
|
|
* dispose method
|
|
* @returns {Tone.GreaterThanZero} this
|
|
*/
|
|
Tone.GreaterThanZero.prototype.dispose = function(){
|
|
Tone.SignalBase.prototype.dispose.call(this);
|
|
this._scale.dispose();
|
|
this._scale = null;
|
|
this._thresh.dispose();
|
|
this._thresh = null;
|
|
return this;
|
|
};
|
|
|
|
export default Tone.GreaterThanZero;
|
|
|