How to use HTML5 Canvas Semicircle
This article describe about HTML5 Canvas Semicircle.
HTML5 Canvas Semicircle
- We can use the arc() method for create a Semicircle in HTML5.
- arc() method is define the ending angle to start angle and add PI.
- The Semicircle is is create a half circle in anti clock wise.
Syntax
<script>
context.arc(x, y, radius, startAngle, startAngle + Math.PI, antiClockwise);
</script> |
Example
|
<html>
<head>
<style>
body
{
margin: 0px;
padding: 0px;
}
#myCanvas
{
border: 1px solid #9C9898;
}
</style>
<script>
window.onload = function ()
{
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.beginPath();
context.arc(170, 45, 50, 0, Math.PI, false);
context.closePath();
context.lineWidth = 5;
context.fillStyle = "#8ED6FF";
context.fill();
context.strokeStyle = "black";
context.stroke();
};
</script>
</head>
<body>
<canvas id="myCanvas" width="320" height="140"></canvas>
</body>
</html>
|
Output
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