68 lines
2.4 KiB
JavaScript
68 lines
2.4 KiB
JavaScript
/////////////////////////
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// MODULATORS
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/////////////////////////
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var SHAPETYPES = ["Sine", "SawUp", "SawDown", "Tri", "Square"];
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const PARAMOPTIONS = ["pulse_length", "eventfulness", "event_length", "metriclarity",
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"harmoniclarity", "melodic_cohesion", "melody_scope", "tonic_pitch", "pitch_center", "pitch_range", "dynamics",
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"attenuation", "chordal_weight"]
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function ControlType(){
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return e('select', {className: 'control-type'}, Option("LFO"));
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}
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function LfoRow(props){
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let content = e('ul', {className: 'lfo-item'},
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ListItem(ControlType()),
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ListItem(DropDown({onChange: props.setShape, value:props.shape, options: SHAPETYPES})),
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ListItem(DropDown({onChange: props.setDjParam, value: props.djParam, options: PARAMOPTIONS})),
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ListItem(e(NumberBox, {onChange:props.setFreq, value:props.freq, step: 0.1}, null)),
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ListItem(e(NumberBox, {onChange:props.setAmp, value:props.amp, step:0.1}, null)),
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ListItem(e(NumberBox, {onChange:props.setPhase, value:props.phase, step:0.1}, null)),
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ListItem(e(Button, {text:'+', onClick: props.addLfo}, null)),
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ListItem(e(Button, {text:'-', onClick: props.removeLfo}, null))
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);
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if (props.visible){
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return content
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};
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}
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function indexWave(type, phase){
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switch (type){
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case "Sine":
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return Math.sin(phase * Math.PI * 2);
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case "SawUp":
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return phase;
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case "SawDown":
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return 1 - phase;
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case "Tri":
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return phase > 0.5? (1-phase) * 2 : phase * 2;
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case "Square":
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return +(phase > 0.5);
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}
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}
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function operateModulators(visibleArr, paramNames, centers, freqs, amps, waveTypes, phaseArr, delta){
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for (let i=0; i<paramNames.length; i++){
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if (visibleArr[i]){
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let name = paramNames[i];
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let center = 0;
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if (centers.hasOwnProperty(name)){
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center = centers[name];
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}
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let output = operateModulator(center, freqs[i], amps[i], waveTypes[i], phaseArr, i, delta);
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window.dispatchEvent(new CustomEvent('enum', {'detail' : [name, output]}));
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}
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}
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}
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function operateModulator(center, freq, amp, waveType, phaseArr, phaseI, delta){
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let oldPhase = phaseArr[phaseI];
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let newPhase = (oldPhase + freq * delta) % 1.00;
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phaseArr[phaseI] = newPhase;
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return indexWave(waveType, newPhase) * amp + center;
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} |