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Fabric.js Polyline centeredRotation Property
  • Last Updated : 22 Jan, 2021
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In this article, we are going to see how to disable the centered rotation of canvas Polyline using FabricJS. The canvas means Polyline is movable and can be stretched according to requirement. Further, the Polyline can be customized when it comes to initial stroke color, fill color, stroke width, or radius.

To make it possible, we are going to use a JavaScript library called FabricJS. After importing the library using CDN, we will create a canvas block in the body tag which will contain our Polyline. After this, we will initialize instances of Canvas and Polyline provided by FabricJS and disable the centered rotation of canvas Polyline using centeredRotation property and render the Polyline on the Canvas as given in the example below.

Syntax:

var polyline = new fabric.Polyline(Points, {  
    centeredRotation: boolean
});  

Parameters: This property accepts a single parameter as mentioned above and described below:

  • centeredRotation: It specifies whether to enable or disable centered rotation.

The below example illustrates the centeredRotationproperty in Fabric.js:



Example:

HTML




<!DOCTYPE html> 
<html
<head
  
    <!-- Loading the FabricJS library -->
    <script src
    </script
</head
  
<body
    <div style="text-align: center;width: 600px;"
        <h1 style="color: green;"
            GeeksforGeeks 
        </h1
        <b
            Fabric.js | Polyline centeredRotation Property 
        </b
    </div
    <canvas id="canvas"
            width="600"
            height="200"
            style="border:1px solid #000000;"
    </canvas
  
    <script
  
        // Initiate a Canvas instance 
        var canvas = new fabric.Canvas("canvas"); 
  
        // Initiate a polyline instance 
        var polyline = new fabric.Polyline([ 
        { x: 200, 
            y: 10 }, 
        {x: 250, 
            y: 50 
        }, { 
            x: 250, 
            y: 180 
        }, { 
            x: 150, 
            y: 180 
        }, { 
            x: 150, 
            y: 50 
        }, { 
            x: 200, 
            y: 10 }], { 
            centeredRotation: false ,
            borderScaleFactor: 3 
        }); 
  
        // Render the polyline in canvas 
        canvas.add(polyline); 
    </script
</body
  
</html>

Output: 

full-stack-img

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