JavaScript - how to fill ellipse with certain color on canvas element?

2 contributors

7 contributions

0 discussions

7 points

Created by:

Iona

415

Simple solution:

context.fillStyle = color;

context.beginPath();
context.ellipse(x, y, radiusX, radiusY, rotation, 0, 2 * Math.PI);
context.fill();

Using JavaScript it is possible to draw filled ellipse with certain color in following way.

1. `fillStyle` property and `ellipse()` method example

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
<head>
  <style> #my-canvas { border: 1px solid gray; } </style>
</head>
<body>
  <canvas id="my-canvas" width="200" height="200"></canvas>
  <script>

    var canvas = document.querySelector('#my-canvas');
    var context = canvas.getContext('2d');

    function fillEllipse(x, y, radiusX, radiusY, rotation, color) {
        context.fillStyle = color;
        context.beginPath();
        context.ellipse(x, y, radiusX, radiusY, rotation, 0, 2 * Math.PI);
        context.fill();
    }
    
    var deg = 20;
    var rad = deg * (Math.PI / 180.0);
    
    // Eclipse paramters:
    //   x=100; y=100; 
    //   width=80; height=40; 
    //   rotation=20;  //  degrees - clockwise rotation according to point (x, y)
    //   color='blue'
    fillEllipse(100, 100, 80, 40, rad, 'blue');

  </script>
</body>
</html>