Radial gradients

• Arguments to the function
• An example
• See also

Radial gradients can be used in place of regular color definitions to add gradients to your canvas. They're different to linear gradients because they're circular in nature, as the name suggests. They're specified using the gradient api and can consist of multiple colors. The createRadialGradient function is used to create the gradient and then the addColorStop function is used to add points along the gradient - similar to linear gradients.

Arguments to the function

• The X1 coordinate
• The Y1 coordinate
• The R1 coordinate (radius)
• The X2 coordinate
• The Y2 coordinate
• The R2 coordinate (radius)

An example

<script>
    window.onload = function ()
    {
        var canvas  = document.getElementById('cvs');
        var context = canvas.getContext('2d');
        
        // Create the gradient
        var gradient = context.createRadialGradient(175,75,0,175,75,100);
        gradient.addColorStop(0, 'white');
        gradient.addColorStop(1, 'rgb(255,125,125)');
        
        context.beginPath();
        context.fillStyle = gradient
        context.arc(125,125,100,0,Math.PI * 2, false);
        context.fill();
    }
</script>

See also

• About canvas color definitions