HTML canvas bezierCurveTo() Method
Example
Draw a cubic B�zier curve:
JavaScript:
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.moveTo(20, 20);
ctx.bezierCurveTo(20, 100, 200, 100, 200, 20);
ctx.stroke();
Try it Yourself »
Browser Support
The numbers in the table specify the first browser version that fully supports the method.
| Method | |||||
|---|---|---|---|---|---|
| bezierCurveTo() | 4.0 | 9.0 | 3.6 | 4.0 | 10.1 |
Definition and Usage
The bezierCurveTo() method adds a point to the current path by using the specified control points that represent a cubic B�zier curve.
A cubic bezier curve requires three points. The first two points are control points that are used in the cubic B�zier calculation and the last point is the ending point for the curve. The starting point for the curve is the last point in the current path. If a path does not exist, use the beginPath() and moveTo() methods to define a starting point.
Start point
moveTo(20, 20)
Control point 1
bezierCurveTo(20, 100, 200, 100, 200, 20)
Control point 2
bezierCurveTo(20, 100, 200, 100, 200, 20)
End point
bezierCurveTo(20, 100, 200, 100, 200, 20)
Tip: Check out the quadraticCurveTo() method. It has one control point instead of two.
| JavaScript syntax: | context.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y); |
|---|
Parameter Values
| Parameter | Description | Play it |
|---|---|---|
| cp1x | The x-coordinate of the first B�zier control point | Play it » |
| cp1y | The y-coordinate of the first B�zier control point | Play it » |
| cp2x | The x-coordinate of the second B�zier control point | Play it » |
| cp2y | The y-coordinate of the second B�zier control point | Play it » |
| x | The x-coordinate of the ending point | Play it » |
| y | The y-coordinate of the ending point | Play it » |
