How to flip a circle vertically using FabricJS?-JS Tutorial-php.cn

Home

Web Front-end

JS Tutorial

How to flip a circle vertically using FabricJS?

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Aug 24, 2023 pm 12:29 PM

如何使用 FabricJS 垂直翻转圆？

In this tutorial, we will learn how to flip a Circle object vertically using FabricJS. Circles are one of the various shapes provided by FabricJS. In order to create a circle, we must create an instance of the Fabric.Circle class and add it to the canvas. We can flip the circular object vertically using the flipY property.

Syntax

new fabric.Circle({ flipY: Boolean }: Object)

Parameters

Options (optional) - This parameter is a Object Provides additional customization for our circles. Using this parameter, you can change properties such as color, cursor, stroke width, and many other properties associated with the object for which flipY is the property.

Option Key

flipY - This property accepts a Boolean value. It allows us to flip objects vertically.

Example 1

Passing flipY as a key with 'false' value

Let's look at an example that shows us the default orientation of circular objects in FabricJS. Since we passed a false value to the flipY property, the circular object will not flip vertically.

<!DOCTYPE html>
<html>
   <head>
      <!-- Adding the Fabric JS Library-->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
   </head>

   <body>
      <h2 id="How-to-flip-a-Circle-vertically-using-FabricJS">How to flip a Circle vertically using FabricJS?</h2>
      <p>This is the default orientation of the object. We have set <b>flipY</b> as False, but even if we don&#39;t use it, <b>flipY</b> will be by default set to False. </p>
      <canvas id="canvas"></canvas>

      <script>
         // Initiate a canvas instance
         var canvas = new fabric.Canvas("canvas");
         var circle = new fabric.Circle({
            left: 215,
            top: 50,
            fill: "green",
            radius: 80,
            stroke: "#228b22",
            strokeWidth: 2,
            flipY: false
         });

         // Create gradient fill
         circle.set("fill", new fabric.Gradient({
            type: "linear",
            coords: {
               x1: 0,
               y1: 0,
               x2: 0,
               y2: 50
            },
            colorStops: [{
               offset: 0,
               color: "red"
            }, {
               offset: 1,
               color: "green"
            }, ],
         }));

         // Adding them to the canvas
         canvas.add(circle);
         canvas.setWidth(document.body.scrollWidth);
         canvas.setHeight(250);
      </script>
   </body>
</html>

Example 2

Passing the FlipY property as a key with a value of "true"

In this example we have a radius of 80px The circular object has a vertical linear gradient fill. When we apply the flipY property to the circle object, it flips vertically, so we see the gradient flipped as well.

<!DOCTYPE html>
<html>
   <head>
      <!-- Adding the Fabric JS Library-->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
   </head>

   <body>
      <h2 id="How-to-flip-a-Circle-vertically-using-FabricJS">How to flip a Circle vertically using FabricJS?</h2>
      <p>Here observe that the circle has flipped vertically (see the gradient), as we have set <b>flipY</b> to True.</p>
      <canvas id="canvas"></canvas>

      <script>
         // Initiate a canvas instance
         var canvas = new fabric.Canvas("canvas");
         var circle = new fabric.Circle({
            left: 215,
            top: 50,
            fill: "green",
            radius: 80,
            stroke: "#228b22",
            strokeWidth: 2,
            flipY: true
         });

         // Create gradient fill
         circle.set("fill", new fabric.Gradient({
            type: "linear",
            coords: {
               x1: 0,
               y1: 0,
               x2: 0,
               y2: 50
            },
            colorStops: [{
               offset: 0,
               color: "red"
            }, {
               offset: 1,
               color: "green"
            }, ],
         }));

         // Adding them to the canvas
         canvas.add(circle);
         canvas.setWidth(document.body.scrollWidth);
         canvas.setHeight(250);
      </script>
   </body>
</html>

The above is the detailed content of How to flip a circle vertically using FabricJS?. For more information, please follow other related articles on the PHP Chinese website!

Statement

This article is reproduced at:tutorialspoint. If there is any infringement, please contact admin@php.cn delete

Replace String Characters in JavaScriptMar 11, 2025 am 12:07 AM

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

Custom Google Search API Setup TutorialMar 04, 2025 am 01:06 AM

This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y

8 Stunning jQuery Page Layout PluginsMar 06, 2025 am 12:48 AM

Leverage jQuery for Effortless Web Page Layouts: 8 Essential Plugins jQuery simplifies web page layout significantly. This article highlights eight powerful jQuery plugins that streamline the process, particularly useful for manual website creation

Build Your Own AJAX Web ApplicationsMar 09, 2025 am 12:11 AM

So here you are, ready to learn all about this thing called AJAX. But, what exactly is it? The term AJAX refers to a loose grouping of technologies that are used to create dynamic, interactive web content. The term AJAX, originally coined by Jesse J

What is 'this' in JavaScript?Mar 04, 2025 am 01:15 AM

Core points This in JavaScript usually refers to an object that "owns" the method, but it depends on how the function is called. When there is no current object, this refers to the global object. In a web browser, it is represented by window. When calling a function, this maintains the global object; but when calling an object constructor or any of its methods, this refers to an instance of the object. You can change the context of this using methods such as call(), apply(), and bind(). These methods call the function using the given this value and parameters. JavaScript is an excellent programming language. A few years ago, this sentence was

Improve Your jQuery Knowledge with the Source ViewerMar 05, 2025 am 12:54 AM

jQuery is a great JavaScript framework. However, as with any library, sometimes it’s necessary to get under the hood to discover what’s going on. Perhaps it’s because you’re tracing a bug or are just curious about how jQuery achieves a particular UI

10 Mobile Cheat Sheets for Mobile DevelopmentMar 05, 2025 am 12:43 AM

This post compiles helpful cheat sheets, reference guides, quick recipes, and code snippets for Android, Blackberry, and iPhone app development. No developer should be without them! Touch Gesture Reference Guide (PDF) A valuable resource for desig

How do I create and publish my own JavaScript libraries?Mar 18, 2025 pm 03:12 PM

Article discusses creating, publishing, and maintaining JavaScript libraries, focusing on planning, development, testing, documentation, and promotion strategies.

See all articles