36 lines
808 B
JavaScript
36 lines
808 B
JavaScript
function Brush()
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{
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this.settings = {size:10,color:"#f00"};
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this.thickness = function(line)
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{
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var ratio = 1 - (distance_between(line.from,line.to)/15.0);
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return this.settings.size * ratio;
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}
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this.stroke = function(line)
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{
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ronin.commander.blur();
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var ctx = ronin.render.context();
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ctx.beginPath();
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ctx.globalCompositeOperation="source-over";
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ctx.moveTo(line.from.x * 2,line.from.y * 2);
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ctx.lineTo(line.to.x * 2,line.to.y * 2);
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ctx.lineCap="round";
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ctx.lineWidth = this.thickness(line);
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ctx.strokeStyle = this.settings.color;
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ctx.stroke();
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ctx.closePath();
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}
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this.mod_size = function(mod)
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{
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this.settings.size += mod;
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}
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function distance_between(a,b)
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{
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return Math.sqrt( (a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y) );
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}
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} |