html tutorial - bezierCurveTo Method in HTML5 Canvas - html5 - html code - html form

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The bezierCurveTo() is a method of HTML canvas.
A Bezier curve is a parametric curve.
The bezierCurveTo() method adds a point to the current path by using the specified control points that represent a cubic Bezier curve.

Syntax for bezierCurveTo() method in HTML5 Canvas:

context.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);

Parameter Values for bezierCurveTo() method in HTML5 Canvas:

parameter	Description
cp1x	The x-coordinate of the first Bezier control point.
cp1y	The y-coordinate of the first Bezier control point.
cp2x	The x-coordinate of the second Bezier control point.
cp2y	The y-coordinate of the second Bezier control point.
x	The x-coordinate of the ending point.
y	The x-coordinate of the ending point.

Sample Coding for bezierCurveTo() method in HTML5 Canvas:

Tryit<!DOCTYPE html>
<html>
    <head>
        <title>Wikitechy bezierCurveTo method</title>
    </head>
    <body>
        <h2>Wikitechy bezierCurveTo method</h2>
        <canvas id="wikitechyCanvas" width="300" height="200"  
                style="border:1px solid blue;">
        </canvas>
        <script>
            var c = document.getElementById("wikitechyCanvas");
            var ctx = c.getContext("2d");
            ctx.beginPath();
            ctx.moveTo(40, 40);
            ctx.bezierCurveTo(40, 200, 250, 200, 250, 40);
            ctx.stroke();
        </script>
    </body>
</html>

Code Explanation for bezierCurveTo() method in HTML5 Canvas:

bezierCurveTo method in HTML5 canvas Code Explanation

“wikitechyCanvas” is declared the id value of the HTML canvas.
The getElementById(); method is used to get the element with the specific id (“wikitechycanvas”).
The beginPath() method begins a path for Bezier curve.
The moveTo() method is used to move the path to the point(40,40) in the canvas.
The beziercurveTo() requires three points. The first two points are control points (40,200) (250,200) that are used in the cubic Bezier calculation and the last point (250,40) is the ending point for the curve. The starting point for the curve is the last point in the current path.
The stroke() method to actually draw the path on the canvas.