117 lines
4.3 KiB
JavaScript
117 lines
4.3 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 MODPARAMOPTIONS = ["NONE", "stream", "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", "tonality-profile", "ostinato-buffer", "ostinato", "meter", "scale"];
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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 linkedText = props.linked ? "-> enums" : "";
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let center = props.centerVals[props.djParam];
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if (!center)
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center = 0;
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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: MODPARAMOPTIONS})),
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ListItem(e("input", {onChange:props.setFreq, value:props.freq, className:"timeInput"}, null)),
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ListItem(e(NumberBox, {onChange:props.setMin, value:props.min, step:0.1}, null)),
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ListItem(e(NumberBox, {onChange:props.setMax, value:props.max, 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("div", {className:"base-val"}, center.toString())),
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ListItem(e("input", {type: 'range', min: 0, max: 1, step: 0.01, readonly: true, id: `slider-${props.djParam}`})),
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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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ListItem(e("div", {className:"linked"}, linkedText)),
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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) / 2) + 0.5;
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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, mins, maxs, waveTypes, phaseArr, currTime, bpm, beatsInMeasure){
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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], mins[i], maxs[i], waveTypes[i], phaseArr, i, name, currTime, bpm, beatsInMeasure);
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if (name !== "NONE")
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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, min, max, waveType, phaseArr, phaseI, name, currTime, bpm, beatsInMeasure){
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let amp = parseFloat(max) - parseFloat(min);
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freq = parseLfoTime(freq, bpm, beatsInMeasure);
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let phase = (currTime * freq + parseFloat(phaseArr[phaseI])) % 1.00;
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let unscaled = indexWave(waveType, phase);
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let el = document.getElementById(`slider-${name}`);
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if (el)
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el.value = unscaled;
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return unscaled * amp + center + parseFloat(min);
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}
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function parseLfoTime(lfoTime, bpm, beatsInMeasure){
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if (lfoTime.slice(-2) == "hz"){
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return parseFloat(lfoTime.slice(0, -2));
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}
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else if (lfoTime.slice(-2) == "ms"){
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return 1000 / parseFloat(lfoTime.slice(0, -2));
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}
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else if (lfoTime.slice(-1) == "s"){
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return 1 / parseFloat(lfoTime.slice(0, -1));
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}
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else if ((lfoTime.match(/:/g) || []).length == 2){
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return 1 / moment.duration(lfoTime).asSeconds();
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}
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else if ((lfoTime.match(/\./g) || []).length == 2){
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return musicalTimingToFreq(...lfoTime.split('.'), bpm, beatsInMeasure)
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}
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else {
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return 0;
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}
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}
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function musicalTimingToFreq(bars, beats, ticks, bpm, beatsInMeasure){
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let totalTicks = (parseFloat(bars) * parseFloat(beatsInMeasure) + beats) * 480 + parseFloat(ticks);
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let tpm = bpm * 480;
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let cyclesPerMinute = tpm / totalTicks;
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let hz = cyclesPerMinute / 60;
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return hz;
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}
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