html5跟随鼠标炫酷网站引导页动画特效建议收藏

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html5跟随鼠标炫酷网站引导页动画特效
一款非常不错的引导页，文字效果渐变，鼠标跟随出绚丽的条纹。html5炫酷网站引导页，鼠标跟随出特效。

效果图：

以下是源代码：

 1 <!DOCTYPE html>  2 <html xmlns="http://www.w3.org/1999/xhtml">  3 <head>  4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  5 <title>html5跟随鼠标炫酷网站引导页动画 - 何问起</title>  6 <link href="http://hovertree.com/texiao/html5/index/hovertreewelcome.css" type="text/css" rel="stylesheet" />  7 </head>  8 <body ondragstart="window.event.returnValue=false" oncontextmenu="window.event.returnValue=false" onselectstart="event.returnValue=false">  9  10 <div id="hovertreecontainer">  11  12 <div>  13 <h1 id="h1">何问起 </h1>  14 <h2 id="h2"> 想问候，不知从何问起，就直接说喜欢你！</h2>  15 <h3 id="h2">hovertree.com为您提供前端特效,ASP.NET等设计开发资料。<a href="http://hovertree.com/hvtart/bjae/onxw4ahp.htm">原文</a> <a href="http://hovertree.com/texiao/">特效</a></h3>  16 <p>&nbsp;</p>  17 <p><strong><a href="http://hovertree.com/">进入主站</a></strong></p>  18 <p>&nbsp;</p>  19 <p>&nbsp;</p>  20 <p>&nbsp;</p>  21 <p>&nbsp;</p>  22 <p>&nbsp;</p>  23 </div>  24  25 </div>  26  27 <canvas id="canvas"></canvas>  28 <audio autoplay="autoplay">  29 <source src="http://hovertree.com" type="audio/ogg">  30 <source src="http://cms.hovertree.com/hovertreesound/hovertreexihuanni.mp3" type="audio/mpeg">  31 您的浏览器不支持播放音乐。请用支持html5的浏览器打开,例如chrome或火狐或者新版IE等。  32 <br />何问起 hovertree.com  33 </audio><script type="text/javascript" src="http://hovertree.com/texiao/html5/index/hovertreewelcome.js">  34 </script>  35 <script type="text/javascript">  36  37 ; (function (window) {  38  39 var ctx,  40 hue,  41 logo,  42 form,  43 buffer,  44 target = {},  45 tendrils = [],  46 settings = {};  47  48 settings.debug = true;  49 settings.friction = 0.5;  50 settings.trails = 20;  51 settings.size = 50;  52 settings.dampening = 0.25;  53 settings.tension = 0.98;  54  55 Math.TWO_PI = Math.PI * 2;  56  57 // ========================================================================================  58 // Oscillator 何问起  59 // ----------------------------------------------------------------------------------------  60  61 function Oscillator(options) {  62 this.init(options || {});  63 }  64  65 Oscillator.prototype = (function () {  66  67 var value = 0;  68  69 return {  70  71 init: function (options) {  72 this.phase = options.phase || 0;  73 this.offset = options.offset || 0;  74 this.frequency = options.frequency || 0.001;  75 this.amplitude = options.amplitude || 1;  76 },  77  78 update: function () {  79 this.phase += this.frequency;  80 value = this.offset + Math.sin(this.phase) * this.amplitude;  81 return value;  82 },  83  84 value: function () {  85 return value;  86 }  87 };  88  89 })();  90  91 // ========================================================================================  92 // Tendril hovertree.com  93 // ----------------------------------------------------------------------------------------  94  95 function Tendril(options) {  96 this.init(options || {});  97 }  98  99 Tendril.prototype = (function () { 100 101 function Node() { 102 this.x = 0; 103 this.y = 0; 104 this.vy = 0; 105 this.vx = 0; 106 } 107 108 return { 109 110 init: function (options) { 111 112 this.spring = options.spring + (Math.random() * 0.1) - 0.05; 113 this.friction = settings.friction + (Math.random() * 0.01) - 0.005; 114 this.nodes = []; 115 116 for (var i = 0, node; i < settings.size; i++) { 117 118 node = new Node(); 119 node.x = target.x; 120 node.y = target.y; 121 122 this.nodes.push(node); 123 } 124 }, 125 126 update: function () { 127 128 var spring = this.spring, 129 node = this.nodes[0]; 130 131 node.vx += (target.x - node.x) * spring; 132 node.vy += (target.y - node.y) * spring; 133 134 for (var prev, i = 0, n = this.nodes.length; i < n; i++) { 135 136 node = this.nodes[i]; 137 138 if (i > 0) { 139 140 prev = this.nodes[i - 1]; 141 142 node.vx += (prev.x - node.x) * spring; 143 node.vy += (prev.y - node.y) * spring; 144 node.vx += prev.vx * settings.dampening; 145 node.vy += prev.vy * settings.dampening; 146 } 147 148 node.vx *= this.friction; 149 node.vy *= this.friction; 150 node.x += node.vx; 151 node.y += node.vy; 152 153 spring *= settings.tension; 154 } 155 }, 156 157 draw: function () { 158 159 var x = this.nodes[0].x, 160 y = this.nodes[0].y, 161 a, b; 162 163 ctx.beginPath(); 164 ctx.moveTo(x, y); 165 166 for (var i = 1, n = this.nodes.length - 2; i < n; i++) { 167 168 a = this.nodes[i]; 169 b = this.nodes[i + 1]; 170 x = (a.x + b.x) * 0.5; 171 y = (a.y + b.y) * 0.5; 172 173 ctx.quadraticCurveTo(a.x, a.y, x, y); 174 } 175 176 a = this.nodes[i]; 177 b = this.nodes[i + 1]; 178 179 ctx.quadraticCurveTo(a.x, a.y, b.x, b.y); 180 ctx.stroke(); 181 ctx.closePath(); 182 } 183 }; 184 185 })(); 186 187 // ---------------------------------------------------------------------------------------- 188 189 function init(event) { 190 191 document.removeEventListener('mousemove', init); 192 document.removeEventListener('touchstart', init); 193 194 document.addEventListener('mousemove', mousemove); 195 document.addEventListener('touchmove', mousemove); 196 document.addEventListener('touchstart', touchstart); 197 198 mousemove(event); 199 reset(); 200 loop(); 201 } 202 203 function reset() { 204 205 tendrils = []; 206 207 for (var i = 0; i < settings.trails; i++) { 208 209 tendrils.push(new Tendril({ 210 spring: 0.45 + 0.025 * (i / settings.trails) 211 })); 212 } 213 } 214 215 function loop() { 216 217 if (!ctx.running) return; 218 219 ctx.globalCompositeOperation = 'source-over'; 220 ctx.fillStyle = 'rgba(8,5,16,0.4)'; 221 ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height); 222 ctx.globalCompositeOperation = 'lighter'; 223 ctx.strokeStyle = 'hsla(' + Math.round(hue.update()) + ',90%,50%,0.25)'; 224 ctx.lineWidth = 1; 225 226 if (ctx.frame % 60 == 0) { 227 console.log(hue.update(), Math.round(hue.update()), hue.phase, hue.offset, hue.frequency, hue.amplitude); 228 } 229 230 for (var i = 0, tendril; i < settings.trails; i++) { 231 tendril = tendrils[i]; 232 tendril.update(); 233 tendril.draw(); 234 } 235 236 ctx.frame++; 237 ctx.stats.update(); 238 requestAnimFrame(loop); 239 } 240 241 function resize() { 242 ctx.canvas.width = window.innerWidth; 243 ctx.canvas.height = window.innerHeight; 244 } 245 246 function start() { 247 if (!ctx.running) { 248 ctx.running = true; 249 loop(); 250 } 251 } 252 253 function stop() { 254 ctx.running = false; 255 } 256 257 function mousemove(event) { 258 if (event.touches) { 259 target.x = event.touches[0].pageX; 260 target.y = event.touches[0].pageY; 261 } else { 262 target.x = event.clientX 263 target.y = event.clientY; 264 } 265 event.preventDefault(); 266 } 267 268 function touchstart(event) { 269 if (event.touches.length == 1) { 270 target.x = event.touches[0].pageX; 271 target.y = event.touches[0].pageY; 272 } 273 } 274 275 function keyup(event) { 276 277 switch (event.keyCode) { 278 case 32: 279 save(); 280 break; 281 default: 282 // console.log(event.keyCode); hovertree.com 283 } 284 } 285 286 function letters(id) { 287 288 var el = document.getElementById(id), 289 letters = el.innerHTML.replace('&amp;', '&').split(''), 290 heading = ''; 291 292 for (var i = 0, n = letters.length, letter; i < n; i++) { 293 letter = letters[i].replace('&', '&amp'); 294 heading += letter.trim() ? '<span class="letter-' + i + '">' + letter + '</span>' : '&nbsp;'; 295 } 296 297 el.innerHTML = heading; 298 setTimeout(function () { 299 el.className = 'transition-in'; 300 }, (Math.random() * 500) + 500); 301 } 302 303 function save() { 304 305 if (!buffer) { 306 307 buffer = document.createElement('canvas'); 308 buffer.width = screen.availWidth; 309 buffer.height = screen.availHeight; 310 buffer.ctx = buffer.getContext('2d'); 311 312 form = document.createElement('form'); 313 form.method = 'post'; 314 form.input = document.createElement('input'); 315 form.input.type = 'hidden'; 316 form.input.name = 'data'; 317 form.appendChild(form.input); 318 319 document.body.appendChild(form); 320 } 321 322 buffer.ctx.fillStyle = 'rgba(8,5,16)'; 323 buffer.ctx.fillRect(0, 0, buffer.width, buffer.height); 324 325 buffer.ctx.drawImage(canvas, 326 Math.round(buffer.width / 2 - canvas.width / 2), 327 Math.round(buffer.height / 2 - canvas.height / 2) 328 ); 329 330 buffer.ctx.drawImage(logo, 331 Math.round(buffer.width / 2 - logo.width / 4), 332 Math.round(buffer.height / 2 - logo.height / 4), 333 logo.width / 2, 334 logo.height / 2 335 ); 336 337 window.open(buffer.toDataURL(), 'wallpaper', 'top=0,left=0,width=' + buffer.width + ',height=' + buffer.height); 338 339 // form.input.value = buffer.toDataURL().substr(22); 340 // form.submit(); hovertree.com 341 } 342 343 window.requestAnimFrame = (function () { 344 return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function (fn) { window.setTimeout(fn, 1000 / 60) }; 345 })(); 346 347 window.onload = function () { 348 349 ctx = document.getElementById('canvas').getContext('2d'); 350 ctx.stats = new Stats(); 351 ctx.running = true; 352 ctx.frame = 1; 353 354 logo = new Image(); 355 logo.src = 'ht' + 'tp://ho' + 'vertree.c' + 'om/themes/hvtimages/hvtlogo.p' + 'ng'; 356 357 hue = new Oscillator({ 358 phase: Math.random() * Math.TWO_PI, 359 amplitude: 85, 360 frequency: 0.0015, 361 offset: 285 362 }); 363 364 letters('h1'); 365 letters('h2'); 366 367 document.addEventListener('mousemove', init); 368 document.addEventListener('touchstart', init); 369 document.body.addEventListener('orientationchange', resize); 370 window.addEventListener('resize', resize); 371 window.addEventListener('keyup', keyup); 372 window.addEventListener('focus', start); 373 window.addEventListener('blur', stop); 374 375 resize(); 376 377 if (window.DEBUG) { 378 379 var gui = new dat.GUI(); 380 381 // gui.add(settings, 'debug'); 382 settings.gui.add(settings, 'trails', 1, 30).onChange(reset); 383 settings.gui.add(settings, 'size', 25, 75).onFinishChange(reset); 384 settings.gui.add(settings, 'friction', 0.45, 0.55).onFinishChange(reset); 385 settings.gui.add(settings, 'dampening', 0.01, 0.4).onFinishChange(reset); 386 settings.gui.add(settings, 'tension', 0.95, 0.999).onFinishChange(reset); 387 388 document.body.appendChild(ctx.stats.domElement); 389 } 390 }; 391 392 })(window); 393 394 </script> 395 </body> 396 </html>