The HTML canvas rotate() Method is used to rotate the drawing by a given angle. Note that the rotation will only work on the canvas that was made after the rotation was done.
Syntax:
context.rotate(angle)
Parameter Values:
- angle: It stores the rotation angle in radians. If the angle is given in the form of a degree then it converts into a radian by using the formula degree*Math.PI/180.
Example 1:
<!DOCTYPE html>
<html>
<head>
<title>
HTML canvas rotate() Method
</title>
</head>
<body>
<center>
<h1 style="color:green">GeeksforGeeks</h1>
<canvas id="GFG" width="500"
height="300" style="border:2px solid gray;">
</canvas>
<script>
var geeks = document.getElementById("GFG");
var context = geeks.getContext("2d");
context.rect(100, 100, 150, 100);//actual rectangle
context.stroke();
context.rotate((-20) * Math.PI / 180);
context.rect(100, 100, 150, 100);//rotate rectangle
context.stroke();
</script>
</center>
</body>
</html>
Output:
Example 2:
<!DOCTYPE html>
<html>
<head>
<title>
HTML canvas rotate() Method
</title>
</head>
<body>
<center>
<h1 style="color:green">GeeksforGeeks</h1>
<canvas id="GFG" width="500"
height="300" style="border:2px solid gray;">
</canvas>
<script>
var geeks = document.getElementById("GFG");
var context = geeks.getContext("2d");
context.rect(100, 100, 150, 100);//actual rectangle
context.stroke();
context.rotate((-20) * Math.PI / 180);
context.rect(100, 100, 150, 100);//rotate rectangle
context.stroke();
</script>
</center>
</body>
</html>
Output:
Supported Browsers:
- Google Chrome
- Internet Explorer 9.0
- Firefox
- Safari
- Opera