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56 lines
995 B
HTML
56 lines
995 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>canvas path - quadratic curve example</title>
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</head>
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<body>
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<canvas width=500 height=500></canvas>
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<script>
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function drawSomeCurves() {
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var canvas = document.querySelector("canvas");
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var ctx = canvas.getContext("2d");
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var x = 150;
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var y = 150;
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canvas.addEventListener("mousedown", function(e) {
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x = e.offsetX;
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y = e.offsetY;
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});
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canvas.addEventListener("mousemove", function(e) {
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ctx.beginPath();
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ctx.fillStyle = 'white';
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ctx.fillRect(0, 0, 500, 500);
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ctx.strokeStyle = 'red';
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ctx.lineWidth = 1;
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ctx.fillRect(0, 0, 500, 500);
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ctx.moveTo(0, 0);
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ctx.quadraticCurveTo(e.offsetX, e.offsetY, x, y);
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ctx.stroke();
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ctx.moveTo(30, 90);
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ctx.lineTo(110, 20);
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ctx.lineTo(240, 130);
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ctx.lineTo(60, 130);
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ctx.lineTo(190, 20);
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ctx.lineTo(270, 90);
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ctx.closePath();
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// Fill path
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ctx.fillStyle = 'green';
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ctx.fill('evenodd');
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});
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}
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drawSomeCurves();
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</script>
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</body>
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</html>
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