hextris/js/math.js

function rotatePoint(x, y, theta) {
    var thetaRad = theta * (Math.PI / 180);
    var rotX = Math.cos(thetaRad) * x - Math.sin(thetaRad) * y;
    var rotY = Math.sin(thetaRad) * x + Math.cos(thetaRad) * y;

    return {
        x: rotX,
        y: rotY
    };
}

function randInt(min, max) {
    return Math.floor((Math.random() * max) + min);
}