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<title>translate.js Example File | Qt Script</title>
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<td >Qt 5.12</td><td ><a href="qtscript-index.html">Qt Script</a></td><td ><a href="qtscript-script-context2d-example.html">Context2D Example</a></td><td >translate.js Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtscript-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h1 class="title">translate.js Example File</h1>
<span class="subtitle">script/context2d/scripts/translate.js</span>
<!-- $$$script/context2d/scripts/translate.js-description -->
<div class="descr"> <a name="details"></a>
<pre class="js">
var ctx = document.getElementById('tutorial').getContext('2d');
ctx.fillRect(0,0,300,300);
for (var i=0;i<3;i++) {
for (var j=0;j<3;j++) {
ctx.save();
ctx.strokeStyle = "#9CFF00";
ctx.translate(50+j*100,50+i*100);
drawSpirograph(ctx,20*(j+2)/(j+1),-8*(i+3)/(i+1),10);
ctx.restore();
}
}
function drawSpirograph(ctx,R,r,O){
var x1 = R-O;
var y1 = 0;
var i = 1;
ctx.beginPath();
ctx.moveTo(x1,y1);
do {
if (i>20000) break;
var x2 = (R+r)*Math.cos(i*Math.PI/72) - (r+O)*Math.cos(((R+r)/r)*(i*Math.PI/72))
var y2 = (R+r)*Math.sin(i*Math.PI/72) - (r+O)*Math.sin(((R+r)/r)*(i*Math.PI/72))
ctx.lineTo(x2,y2);
x1 = x2;
y1 = y2;
i++;
} while (x2 != R-O && y2 != 0 );
ctx.stroke();
}
</pre>
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<!-- @@@script/context2d/scripts/translate.js -->
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distrib
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Mageia
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7
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armv7hl
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media
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core-updates
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by-pkgid
>
32e951f007f30f654c2e19437a4aa0ce
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files
>
85
