Uncaught TypeError: Cannot read property 'useProgram' of undefined (fisheye: line 299)

[immjs]

How do I fix it?

[ericleong]

Do you have more details? What browser are you using and what code is causing the error?

Did you initialize the library like this?

var canvas = document.getElementById('canvas');
var fisheye = new Fisheye(canvas);

fisheye.setDistortion(red, green, blue);