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Added rainbow colours (gradient) [updated] #5

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Added rainbow colours (gradient) [updated] #5

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20 changes: 18 additions & 2 deletions visualizer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@ let drawCurved = true;
let drawFilled = false;
//Whether to draw text the songText on top of the visualisation
let drawText = false;
//Rainbow gradients more your thing? You can enable this for full rainbow effect (this ignores "barColour")
let rainbowColours = false;

//Can't touch this
let audioContext;
Expand Down Expand Up @@ -93,14 +95,27 @@ function paint() {

if(!audioVisualizerInitialized)
return;

if (rainbowColors) {
var gradient = canvasContext.createLinearGradient(10, 0, canvasWidth, canvasHeight);
gradient.addColorStop(0, 'red');
gradient.addColorStop(1 / 6, 'orange');
gradient.addColorStop(2 / 6, 'yellow');
gradient.addColorStop(3 / 6, 'green');
gradient.addColorStop(4 / 6, 'blue');
gradient.addColorStop(5 / 6, 'indigo');
gradient.addColorStop(1, 'violet');
}

canvasContext.fillStyle = backgroundColour;
canvasContext.fillRect(0, 0, canvasWidth, canvasHeight);

let bins = audioAnalyserNode.frequencyBinCount;
let data = new Uint8Array(bins);
audioAnalyserNode.getByteFrequencyData(data);
canvasContext.fillStyle = barColour;

if (rainbowColors) { canvasContext.fillStyle = gradient; }
else { canvasContext.fillStyle = barColour; }

if (drawPitch)
updateBinsLog(logLookupTable, data);
Expand All @@ -112,7 +127,8 @@ function paint() {
paintSingleBin(i);
}
} else {
canvasContext.fillStyle = barColour;
if (rainbowColors) { canvasContext.fillStyle = gradient; }
else { canvasContext.fillStyle = barColour; }
canvasContext.beginPath();
canvasContext.moveTo(0, canvasHeight - getBinHeight(0));
let i;
Expand Down