Robin Davies
84 lines
2.2 KiB
JavaScript
84 lines
2.2 KiB
JavaScript
var ToobGain = {
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CreateWrapper: function (selector,width,height)
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{
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var result = {
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MIN_DB_AF: Math.pow(10,-192/20),
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width: width,
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height:height,
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debugBreak: true,
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DebugBreak: function()
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{
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if (this.debugBreak)
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{
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this.debugBreak = false;
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debugger;
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}
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},
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gain: 1e-7,
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gainScale: 1,
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SetValue: function(value)
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{
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value = value*value;
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value = value*value*1000;
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if (value < 1E-7) value = 1E-7;
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this.gain = value;
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this.gainScale = 1/Math.atan(this.gain);
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this.MaybeDraw();
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},
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GainFn: function(x)
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{
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return Math.atan(x*this.gain)*this.gainScale;
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},
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Draw: function(svg)
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{
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svg.clear();
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var points = [];
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var ix = 0;
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var xs = this.width/2;
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var ys = (this.height-2)/2;
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var y0 = this.height/2;
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for (var x = -1.0; x <= 1.0; x += 2.0/this.width)
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{
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var y = this.GainFn(x);
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points[ix++] = [ (x+1)*xs, y0-y*ys];
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}
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svg.polyline(points,{ fill: 'none', stroke: '#880', strokeThickness: 0.5, opacity: 0.5});
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},
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MaybeDraw: function()
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{
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if (this.svgPlot)
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{
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this.Draw(this.svgPlot);
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}
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},
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DrawPlot: function(svg)
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{
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this.svgPlot = svg;
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this.MaybeDraw();
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},
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Attach: function(selector)
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{
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//this.DebugBreak();
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this.plot = $("<div>");
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selector.append(this.plot);
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var self = this;
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this.plot.svg({onLoad: function (svg) { self.DrawPlot.apply(self,[svg]); } });
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}
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};
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result.Attach(selector);
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return result;
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}
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};
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