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HTML5 canvas arcTo Method

HTML5 track Tag Reference HTML5 canvas reference

Example

Draw a line with a long round corner:

JavaScript:

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.beginPath();
ctx.moveTo(20,20);
ctx.lineTo(100,20);
ctx.arcTo(150,20,150,70,50);
ctx.lineTo(150,120);
ctx.stroke();

Try it yourself »

Definition and Usage

The arcTo method draws an arc between to points in the canvas.

Specify the two points and the arc's radius by using the five parameters.

JavaScript syntax:	context.arcTo(x1,y1,x2,y2,r);

Browser Support

The arcTo method is not fully suported in Opera.

Parameter Values

Parameter	Values	Description	Play it
x1	x-coordinate	The x-coordinate of the beginning of the arc	Play it »
y1	y-coordinate	The y-coordinate of the beginning of the arc	Play it »
x2	x-coordinate	The x-coordinate of the end of the arc	Play it »
y2	y-coordinate	The y-coordinate of the end of the arc	Play it »
r	radius	The radius of the arc	Play it »