@polygonjs/polygonjs
Version:
node-based WebGL 3D engine https://polygonjs.com
65 lines (64 loc) • 2.06 kB
JavaScript
;
import { TypedAudioNode } from "./_Base";
import { NodeParamsConfig, ParamConfig } from "../utils/params/ParamsConfig";
import { AudioBuilder } from "../../../core/audio/AudioBuilder";
export const ENVELOPE_DEFAULTS = {
attackCurve: "linear",
attack: 0.01,
decayCurve: "exponential",
decay: 0.1,
releaseCurve: "exponential",
release: 1,
sustain: 0.5
};
class EnvelopeAudioParamsConfig extends NodeParamsConfig {
constructor() {
super(...arguments);
/** @param The amount of time it takes for the envelope to go from 0 to it's maximum value. */
this.attack = ParamConfig.FLOAT(ENVELOPE_DEFAULTS.attack, {
range: [0, 0.1],
rangeLocked: [true, false]
});
/** The period of time after the attack that it takes for the envelope to fall to the sustain value. */
this.decay = ParamConfig.FLOAT(ENVELOPE_DEFAULTS.decay, {
range: [0, 1],
rangeLocked: [true, false]
});
/** The percent of the maximum value that the envelope rests at until the release is triggered. */
this.sustain = ParamConfig.FLOAT(ENVELOPE_DEFAULTS.sustain, {
range: [0, 1],
rangeLocked: [true, false]
});
/** The amount of time after the release is triggered it takes to reach 0. */
this.release = ParamConfig.FLOAT(ENVELOPE_DEFAULTS.release, {
range: [0, 1],
rangeLocked: [true, false]
});
}
}
const ParamsConfig = new EnvelopeAudioParamsConfig();
export class EnvelopeAudioNode extends TypedAudioNode {
constructor() {
super(...arguments);
this.paramsConfig = ParamsConfig;
}
static type() {
return "envelope";
}
initializeNode() {
this.io.inputs.setCount(0);
}
cook(inputContents) {
const audioBuilder = new AudioBuilder();
audioBuilder.setEnvelopeParams({
attackCurve: "linear",
attack: this.pv.attack,
decayCurve: "exponential",
decay: this.pv.decay,
releaseCurve: "exponential",
release: this.pv.release,
sustain: this.pv.sustain
});
this.setAudioBuilder(audioBuilder);
}
}