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90 lines
2.8 KiB
JavaScript
90 lines
2.8 KiB
JavaScript
6 years ago
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;(function(){
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var msg = "IRIS version 0.5";
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var size = 14;
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var circleY = 0.75; var circleX = 2;
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var letter_spacing = 5;
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var diameter = 10;
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var rotation = 0.4;
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var speed = 0.3;
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if (!window.addEventListener && !window.attachEvent || !document.createElement) return;
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msg = msg.split('');
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var n = msg.length - 1, a = Math.round(size * diameter * 0.208333), currStep = 20,
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ymouse = a * circleY + 20, xmouse = a * circleX + 20, y = [], x = [], Y = [], X = [],
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o = document.createElement('div'), oi = document.createElement('div'),
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b = document.compatMode && document.compatMode != "BackCompat"? document.documentElement : document.body,
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mouse = function(e){
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e = e || window.event;
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ymouse = !isNaN(e.pageY)? e.pageY : e.clientY; // y-position
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xmouse = !isNaN(e.pageX)? e.pageX : e.clientX; // x-position
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},
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makecircle = function(){ // rotation/positioning
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if(init.nopy){
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o.style.top = (b || document.body).scrollTop + 'px';
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o.style.left = (b || document.body).scrollLeft + 'px';
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};
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currStep -= rotation;
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for (var d, i = n; i > -1; --i){ // makes the circle
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d = document.getElementById('iemsg' + i).style;
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d.top = Math.round(y[i] + a * Math.sin((currStep + i) / letter_spacing) * circleY - 15) + 'px';
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d.left = Math.round(x[i] + a * Math.cos((currStep + i) / letter_spacing) * circleX) + 'px';
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};
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},
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drag = function(){ // makes the resistance
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y[0] = Y[0] += (ymouse - Y[0]) * speed;
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x[0] = X[0] += (xmouse - 20 - X[0]) * speed;
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for (var i = n; i > 0; --i){
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y[i] = Y[i] += (y[i-1] - Y[i]) * speed;
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x[i] = X[i] += (x[i-1] - X[i]) * speed;
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};
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makecircle();
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},
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init = function(){ // appends message divs, & sets initial values for positioning arrays
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if(!isNaN(window.pageYOffset)){
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ymouse += window.pageYOffset;
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xmouse += window.pageXOffset;
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} else init.nopy = true;
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for (var d, i = n; i > -1; --i){
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d = document.createElement('div'); d.id = 'iemsg' + i;
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d.style.height = d.style.width = a + 'px';
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d.appendChild(document.createTextNode(msg[i]));
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oi.appendChild(d); y[i] = x[i] = Y[i] = X[i] = 0;
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};
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o.appendChild(oi); document.body.appendChild(o);
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setInterval(drag, 25);
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},
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ascroll = function(){
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ymouse += window.pageYOffset;
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xmouse += window.pageXOffset;
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window.removeEventListener('scroll', ascroll, false);
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};
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o.id = 'outerCircleText'; o.style.fontSize = size + 'px';
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if (window.addEventListener){
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window.addEventListener('load', init, false);
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document.addEventListener('mouseover', mouse, false);
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document.addEventListener('mousemove', mouse, false);
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if (/Apple/.test(navigator.vendor))
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window.addEventListener('scroll', ascroll, false);
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}
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else if (window.attachEvent){
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window.attachEvent('onload', init);
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document.attachEvent('onmousemove', mouse);
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};
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})();
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