kieran-mcauliffe/max-mod-enum
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basic random value noise functions

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Kieran 2024-10-10 12:23:50 +02:00
parent 43e517cc4e
commit d22cdc8401
2 changed files with 22 additions and 3 deletions
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2
lfogui.js
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@ -205,7 +205,7 @@ function MasterLfoHandler(){
function handleTick(event) {
let time = (Date.now() - firstUpdateTime) / 1000;
let noiseData = {lastPhaseArr, setLastPhaseArr, cachedNoiseValueArr, setCachedNoiseValueArr};
let noiseData = {lastPhaseArr, setLastPhaseArr, cachedNoiseValueArr, setCachedNoiseValueArr, noiseTypeArr};
operateModulators(modVisibleArr, modTypeArr, modInstanceNumArr, djParamArr, modCenterVals, freqArr, minArr, maxArr, shapeArr, initPhaseArr, noiseData, userDefinedWave, time, beatsInMeasure, ticks);
}

23
modulators.js
View File

@ -5,7 +5,7 @@
var TYPEOPTIONS = ["LFO", "Noise"];
var SHAPETYPES = ["Sine", "SawUp", "SawDown", "Tri", "Square", "Custom"];
var NOISETYPES = ["Sine Int."]
var NOISETYPES = ["Rand", "Line Int.", "Sine Int."]
var INSTANCEOPTIONS = ["1", "2", "3", "4"];
@ -132,6 +132,7 @@ function operateNoise(center, inst, timeBaseStr, min, max, waveType, phaseArr, i
let amp = parseFloat(max) - parseFloat(min);
let phaseType;
let timeBase;
let noiseType = noiseData.noiseTypeArr[index];
[timeBase, phaseType] = parseLfoTime(timeBaseStr, beatsInMeasure);
let phase;
@ -156,13 +157,31 @@ function operateNoise(center, inst, timeBaseStr, min, max, waveType, phaseArr, i
let sinePhase = (Math.sin(Math.PI + Math.PI * phase) + 1) / 2
let unscaled = (noiseData.cachedNoiseValueArr[index][1] - noiseData.cachedNoiseValueArr[index][0]) * sinePhase + noiseData.cachedNoiseValueArr[index][0];
//let unscaled = (noiseData.cachedNoiseValueArr[index][1] - noiseData.cachedNoiseValueArr[index][0]) * sinePhase + noiseData.cachedNoiseValueArr[index][0];
let unscaled = interpolateNoise(noiseData.noiseTypeArr[index], noiseData.cachedNoiseValueArr[index][0], noiseData.cachedNoiseValueArr[index][1], phase);
syncDisplay(inst, name, unscaled);
return unscaled * amp + center + parseFloat(min);
}
function interpolateNoise(type, cachedVal1, cachedVal2, phase){
let interpVal;
switch (type){
case "Sine Int.":
interpVal = (Math.sin(Math.PI + Math.PI * phase) + 1) / 2;
break;
case "Rand":
interpVal = 0;
break;
case "Line Int.":
interpVal = phase;
break;
}
return (cachedVal2 - cachedVal1) * interpVal + cachedVal1;
}
// actual returns the period for musical timing, to avoid floating point errors
function parseLfoTime(lfoTime, beatsInMeasure){
if (lfoTime.slice(-2) == "hz"){