Fabric.js | flipY Attribute for Triangles

Fabric.js is a powerful and popular Javascript library for creating and manipulating graphics and images. One of the many features of Fabric.js is the ability to flip objects vertically or horizontally, which can be achieved using the flipY attribute.

In particular, the flipY attribute can be used to flip a triangle object vertically along the y-axis. To demonstrate this feature, we can create a triangle object in Fabric.js with the following code:

var triangle = new fabric.Triangle({
  width: 100,
  height: 100,
  fill: 'red',
  left: 50,
  top: 50
});

This code creates a red triangle with a width and height of 100, and positions it at the coordinates (50,50) on the canvas. To flip the triangle vertically, we simply set the flipY attribute to true:

triangle.set('flipY', true);
canvas.renderAll();

This code flips the triangle along the y-axis, making it upside down on the canvas. To further manipulate the triangle, we can also use the scaleX and scaleY attributes to scale it in size, as well as the rotate attribute to rotate it in degrees.

Overall, the flipY attribute is a useful tool for manipulating triangle objects in Fabric.js, allowing programmers to create complex and dynamic graphics with ease.