awesome-cursor.js

/* Circle Text Styles */
;(function(){
    var msg = "Punk is kool!!";
    var size = 22;
    var circleY = 0.75; var circleX = 2;
    var letter_spacing = 5;
    var diameter = 10;
    var rotation = 0.4;
    var speed = 0.3;
    if (!window.addEventListener && !window.attachEvent || !document.createElement) return;
    msg = msg.split('');
    var n = msg.length - 1, a = Math.round(size * diameter * 0.208333), currStep = 20,
        ymouse = a * circleY + 20, xmouse = a * circleX + 20, y = [], x = [], Y = [], X = [],
        o = document.createElement('div'), oi = document.createElement('div'),
        b = document.compatMode && document.compatMode != "BackCompat"? document.documentElement : document.body,


        mouse = function(e){
            e = e || window.event;
            ymouse = !isNaN(e.pageY)? e.pageY : e.clientY; // y-position
            xmouse = !isNaN(e.pageX)? e.pageX : e.clientX; // x-position
        },
        makecircle = function(){ // rotation/positioning
            if(init.nopy){
                o.style.top = (b || document.body).scrollTop + 'px';
                o.style.left = (b || document.body).scrollLeft + 'px';
            };
            currStep -= rotation;
            for (var d, i = n; i > -1; --i){ // makes the circle
                d = document.getElementById('iemsg' + i).style;
                d.top = Math.round(y[i] + a * Math.sin((currStep + i) / letter_spacing) * circleY - 15) + 'px';
                d.left = Math.round(x[i] + a * Math.cos((currStep + i) / letter_spacing) * circleX) + 'px';
            };
        },
        drag = function(){ // makes the resistance
            y[0] = Y[0] += (ymouse - Y[0]) * speed;
            x[0] = X[0] += (xmouse - 20 - X[0]) * speed;
            for (var i = n; i > 0; --i){
                y[i] = Y[i] += (y[i-1] - Y[i]) * speed;
                x[i] = X[i] += (x[i-1] - X[i]) * speed;
            };
            makecircle();
        },
        init = function(){ // appends message divs, & sets initial values for positioning arrays
            if(!isNaN(window.pageYOffset)){
                ymouse += window.pageYOffset;
                xmouse += window.pageXOffset;
            } else init.nopy = true;
            for (var d, i = n; i > -1; --i){
                d = document.createElement('div'); d.id = 'iemsg' + i;
                d.style.height = d.style.width = a + 'px';
                d.appendChild(document.createTextNode(msg[i]));
                oi.appendChild(d); y[i] = x[i] = Y[i] = X[i] = 0;
            };
            o.appendChild(oi); document.body.appendChild(o);
            setInterval(drag, 25);
        },
        ascroll = function(){
            ymouse += window.pageYOffset;
            xmouse += window.pageXOffset;
            window.removeEventListener('scroll', ascroll, false);
        };
    o.id = 'outerCircleText'; o.style.fontSize = size + 'px';
    if (window.addEventListener){
        window.addEventListener('load', init, false);
        document.addEventListener('mouseover', mouse, false);
        document.addEventListener('mousemove', mouse, false);
        if (/Apple/.test(navigator.vendor))
            window.addEventListener('scroll', ascroll, false);
    }
    else if (window.attachEvent){
        window.attachEvent('onload', init);
        document.attachEvent('onmousemove', mouse);
    };
})();