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How to draw Bezier curve using HTML5 Canvas?

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Release： 2023-09-02 20:21:05
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HTML5 tags are used to draw graphics, animations, etc. using scripts. It is a new tag introduced in HTML5. The canvas element has a DOM method called getContext, which obtains the rendering context and its drawing functions. This function takes one argument, the type of context 2d.

To draw a Bezier curve using the HTML5 canvas, use the bezierCurveTo() method. This method adds the given point to the current path, connecting it to the previous path via a cubic Bezier curve with the given control points.

如何使用HTML5 Canvas绘制贝塞尔曲线？

#You can try running the following code to learn how to draw Bezier curves on HTML5 Canvas. The x and y parameters in the bezierCurveTo() method are the coordinates of the endpoints. cp1x and cp1y are the coordinates of the first control point, and cp2x and cp2y are the coordinates of the second control point.

Example

<!DOCTYPE html>
<html>
<head>
<title>HTML5 Canvas Tag</title>
</head>

<body>
<canvas id = "newCanvas" width = "500" height = "300" style = "border:1px solid #000000;"></canvas>
<script>
var c = document.getElementById(&#39;newCanvas&#39;);
var ctx = c.getContext(&#39;2d&#39;);
ctx.beginPath();
ctx.moveTo(75,40);
ctx.bezierCurveTo(75,37,70,25,50,25);
ctx.bezierCurveTo(20,25,20,62.5,20,62.5);
ctx.bezierCurveTo(20,80,40,102,75,120);
ctx.bezierCurveTo(110,102,130,80,130,62.5);
ctx.bezierCurveTo(130,62.5,130,25,100,25);
ctx.bezierCurveTo(85,25,75,37,75,40);
ctx.fill();
</script>

</body>
</html>
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Output

如何使用HTML5 Canvas绘制贝塞尔曲线？

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