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Remove context.translate()

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This commit is contained in:
Jordan Eldredge 2014-12-03 16:55:33 -08:00
parent 3d0a157269
commit 85607b4fc0
1 changed files with 4 additions and 3 deletions
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7
visualizer.js
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@ -7,7 +7,6 @@ Visualizer = {
this.canvasCtx.imageSmoothingEnabled= false;
this.width = this.canvas.width * 1; // Cast to int
this.height = this.canvas.height * 1; // Cast to int
this.canvasCtx.translate(1, 1); // http://stackoverflow.com/questions/13593527/canvas-make-the-line-thicker
this.colors = []; // skin.js fills this from viscolors.txt
this.NONE = 0;
this.OSCILLOSCOPE = 1;
@ -56,13 +55,11 @@ Visualizer = {
this.analyser.fftSize = 2048;
this.bufferLength = this.analyser.fftSize;
this.dataArray = new Uint8Array(this.bufferLength);
this.canvasCtx.translate(1, 1); // http://stackoverflow.com/questions/13593527/canvas-make-the-line-thicker
} else if(this.style == this.BAR) {
this.analyser.fftSize = 64; // Must be a power of two
// Number of bins/bars we get
this.bufferLength = this.analyser.frequencyBinCount;
this.dataArray = new Uint8Array(this.bufferLength);
this.canvasCtx.translate(0, 0);
}
},
@ -114,6 +111,10 @@ Visualizer = {
percentAmplitude = amplitude / 128; // dataArray gives us bytes
y = percentAmplitude * h;
x = j * 2;
// Canvas coordinates are in the middle of the pixel by default.
// When we want to draw pixel perfect lines, we will need to
// account for that here
if(x == 0) {
this.canvasCtx.moveTo(x, y);
} else {