多视角3D可旋转的HTML5 Logo动画

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这是一款基于HTML5和CSS3的3D动画特效，与之前的3D特效不同的是，这款是完全用HTML5特性实现的，而并非用多张图片叠加起来。这款3D动画还有一个特点是可以无限的旋转，从而可以从多个视角来观察HTML5 Logo。

在线演示源码下载

HTML代码

<div class="link-overlay"></div><canvas id="canvas" style="background-color:#ddd"></canvas>

JavaScript代码

// bind to window onload handlerwindow.addEventListener('load', onloadHandler, false);/** * Window onload handler */function onloadHandler(){   var canvas = document.getElementById('canvas');   canvas.width = window.innerWidth;   canvas.height = window.innerHeight;   var k3dmain = new K3D.Controller(canvas, true);   // generate 3D objects   var obj1 = new K3D.K3DObject();   with (obj1)   {      drawmode = "solid";      shademode = "lightsource";      sortmode = "unsorted";      addphi = -0.5;      abouty = -90;      perslevel = 1000;      init(         [{x:-80,y:180,z:0},{x:0,y:180,z:-80},{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:-50,y:150,z:-30},{x:0,y:150,z:-80},{x:0,y:130,z:-80},{x:-30,y:130,z:-50},{x:-28,y:110,z:-52},{x:0,y:110,z:-80},{x:0,y:90,z:-80},{x:-45,y:90,z:-35},{x:-44,y:80,z:-36},{x:-25,y:80,z:-55},{x:-22,y:66,z:-58},{x:0,y:60,z:-80},{x:0,y:40,z:-80},{x:-40,y:50,z:-40}],         [],         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]      );   }   k3dmain.addK3DObject(obj1);   var obj2 = new K3D.K3DObject();   with (obj2)   {      drawmode = "solid";      shademode = "lightsource";      sortmode = "unsorted";      addphi = -0.5;      abouty = -90;      perslevel = 1000;      init(         [{x:0,y:180,z:-80},{x:80,y:180,z:0},{x:80,y:20,z:0},{x:0,y:0,z:-80},{x:0,y:165,z:-80},{x:68,y:165,z:-12},{x:55,y:35,z:-25},{x:0,y:20,z:-80},{x:0,y:150,z:-80},{x:50,y:150,z:-30},{x:47,y:130,z:-33},{x:0,y:130,z:-80},{x:0,y:110,z:-80},{x:45,y:110,z:-35},{x:40,y:50,z:-40},{x:0,y:40,z:-80},{x:0,y:60,z:-80},{x:20,y:66,z:-60},{x:23,y:90,z:-57},{x:0,y:90,z:-80}],         [],         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]      );   }   k3dmain.addK3DObject(obj2);   var obj3 = new K3D.K3DObject();   with (obj3)   {      drawmode = "solid";      shademode = "lightsource";      sortmode = "unsorted";      addphi = -0.5;      abouty = -90;      perslevel = 1000;      init(         [{x:80,y:180,z:0},{x:0,y:180,z:80},{x:0,y:0,z:80},{x:80,y:20,z:0},{x:50,y:150,z:30},{x:0,y:150,z:80},{x:0,y:130,z:80},{x:30,y:130,z:50},{x:28,y:110,z:52},{x:0,y:110,z:80},{x:0,y:90,z:80},{x:45,y:90,z:35},{x:44,y:80,z:36},{x:25,y:80,z:55},{x:22,y:66,z:58},{x:0,y:60,z:80},{x:0,y:40,z:80},{x:40,y:50,z:40}],         [],         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]      );   }   k3dmain.addK3DObject(obj3);   var obj4 = new K3D.K3DObject();   with (obj4)   {      drawmode = "solid";      shademode = "lightsource";      sortmode = "unsorted";      addphi = -0.5;      abouty = -90;      perslevel = 1000;      init(         [{x:0,y:180,z:80},{x:-80,y:180,z:0},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:0,y:165,z:80},{x:-68,y:165,z:12},{x:-55,y:35,z:25},{x:0,y:20,z:80},{x:0,y:150,z:80},{x:-50,y:150,z:30},{x:-47,y:130,z:33},{x:0,y:130,z:80},{x:0,y:110,z:80},{x:-45,y:110,z:35},{x:-40,y:50,z:40},{x:0,y:40,z:80},{x:0,y:60,z:80},{x:-20,y:66,z:60},{x:-23,y:90,z:57},{x:0,y:90,z:80}],         [],         [{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]      );   }   k3dmain.addK3DObject(obj4);   var objBase = new K3D.K3DObject();   with (objBase)   {      drawmode = "solid";      shademode = "lightsource";      sortmode = "unsorted";      addphi = -0.5;      abouty = -90;      perslevel = 1000;      init(         [{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:80,y:20,z:0}],         [],         [{color:[227,76,38],vertices:[0,2,1,0]},{color:[227,76,38],vertices:[0,3,2,0]}]      );   }   k3dmain.addK3DObject(objBase);   var objHtml = new K3D.K3DObject();   with (objHtml)   {      drawmode = "solid";      shademode = "lightsource";      //sortmode = "unsorted";      color = [64,64,64];      doublesided = true;      addphi = -0.5;      abouty = 100;      scale = 0.75;      perslevel = 1000;      init(         [{x:-80,y:40,z:0},{x:-70,y:40,z:0},{x:-70,y:30,z:0},{x:-60,y:30,z:0},{x:-60,y:40,z:0},{x:-50,y:40,z:0},{x:-50,y:10,z:0},{x:-60,y:10,z:0},{x:-60,y:20,z:0},{x:-70,y:20,z:0},{x:-70,y:10,z:0},{x:-80,y:10,z:0},{x:-40,y:40,z:0},{x:-10,y:40,z:0},{x:-10,y:30,z:0},{x:-20,y:30,z:0},{x:-20,y:10,z:0},{x:-30,y:10,z:0},{x:-30,y:30,z:0},{x:-40,y:30,z:0},{x:0,y:40,z:0},{x:10,y:40,z:0},{x:20,y:30,z:0},{x:30,y:40,z:0},{x:40,y:40,z:0},{x:40,y:10,z:0},{x:30,y:10,z:0},{x:30,y:30,z:0},{x:20,y:20,z:0},{x:10,y:30,z:0},{x:10,y:10,z:0},{x:0,y:10,z:0},{x:50,y:40,z:0},{x:60,y:40,z:0},{x:60,y:20,z:0},{x:80,y:20,z:0},{x:80,y:10,z:0},{x:50,y:10,z:0}],         [],         [{vertices:[0,1,2,3,4,5,6,7,8,9,10,11,0]},{vertices:[12,13,14,15,16,17,18,19,12]},{vertices:[20,21,22,23,24,25,26,27,28,29,30,31,20]},{vertices:[32,33,34,35,36,37,32]}]      );   }   k3dmain.addK3DObject(objHtml);   // add render loop callback   var ctx = canvas.getContext('2d');   var rotationOffset = 0;   var len = (canvas.height > canvas.width ? canvas.height : canvas.width) * 0.7;   k3dmain.clearBackground = false;   k3dmain.callback = function()   {      // manually clear bg - as we want to render some extra goodies      ctx.clearRect(0, 0, canvas.width, canvas.height);      // draw bg effect before K3D does its 3D rendering      ctx.save();      ctx.translate(canvas.width/2, canvas.height/2);      ctx.rotate(rotationOffset);      // first fill pass - outer rays      var RAYCOUNT = 24;      ctx.fillStyle = "#eee";      ctx.beginPath();      for (var i=0; i<RAYCOUNT; i++)      {         // rotate context         ctx.rotate(TWOPI / RAYCOUNT);         ctx.moveTo(0, 0);         ctx.lineTo(-20, len);         ctx.lineTo(20, len);      }      ctx.closePath();      ctx.fill();      // second fill pass - inner rays      ctx.fillStyle = "#fff";      ctx.beginPath();      for (var i=0; i<RAYCOUNT; i++)      {         // rotate context         ctx.rotate(TWOPI / RAYCOUNT);         ctx.moveTo(0, 0);         ctx.lineTo(-15, len);         ctx.lineTo(15, len);      }      ctx.closePath();      ctx.fill();      ctx.restore();      rotationOffset += 0.005;      // apply user interaction to rotation      for (var i=0, objs=k3dmain.objects; i<objs.length; i++)      {         objs[i].ophi += targetRotationX;      }      if (targetRotationX > -0.5) targetRotationX -= 0.05;      else if (targetRotationX < -0.55) targetRotationX += 0.05;      if (targetRotationX > -0.55 && targetRotationX < -0.5) targetRotationX = -0.5;   };   // start demo loop   k3dmain.paused = true;   setInterval(function(){k3dmain.tick()}, 1000/60);}// nifty drag/touch event capture code borrowed from Mr Doob http://mrdoob.com/var targetRotationX = 0;var targetRotationOnMouseDownX = 0;var mouseX = 0;var mouseXOnMouseDown = 0;var targetRotationY = 0;var targetRotationOnMouseDownY = 0;var mouseY = 0;var mouseYOnMouseDown = 0;var windowHalfX = window.innerWidth / 2;var windowHalfY = window.innerHeight / 2;document.addEventListener('mousedown', onDocumentMouseDown, false);document.addEventListener('touchstart', onDocumentTouchStart, false);document.addEventListener('touchmove', onDocumentTouchMove, false);function onDocumentMouseDown( event ) {event.preventDefault();document.addEventListener('mousemove', onDocumentMouseMove, false);document.addEventListener('mouseup', onDocumentMouseUp, false);document.addEventListener('mouseout', onDocumentMouseOut, false);mouseXOnMouseDown = event.clientX - windowHalfX;targetRotationOnMouseDownX = targetRotationX;mouseYOnMouseDown = event.clientY - windowHalfY;targetRotationOnMouseDownY = targetRotationY;}function onDocumentMouseMove( event ){mouseX = event.clientX - windowHalfX;targetRotationX = targetRotationOnMouseDownX + (mouseX - mouseXOnMouseDown) * 0.02;mouseY = event.clientY - windowHalfY;targetRotationY = targetRotationOnMouseDownY + (mouseY - mouseYOnMouseDown) * 0.02;}function onDocumentMouseUp( event ){document.removeEventListener('mousemove', onDocumentMouseMove, false);document.removeEventListener('mouseup', onDocumentMouseUp, false);document.removeEventListener('mouseout', onDocumentMouseOut, false);}function onDocumentMouseOut( event ){document.removeEventListener('mousemove', onDocumentMouseMove, false);document.removeEventListener('mouseup', onDocumentMouseUp, false);document.removeEventListener('mouseout', onDocumentMouseOut, false);}function onDocumentTouchStart( event ){if (event.touches.length == 1){event.preventDefault();mouseXOnMouseDown = event.touches[0].pageX - windowHalfX;targetRotationOnMouseDownX = targetRotationX;mouseYOnMouseDown = event.touches[0].pageY - windowHalfY;targetRotationOnMouseDownY = targetRotationY;}}function onDocumentTouchMove( event ){if (event.touches.length == 1){event.preventDefault();mouseX = event.touches[0].pageX - windowHalfX;targetRotationX = targetRotationOnMouseDownX + (mouseX - mouseXOnMouseDown) * 0.05;mouseY = event.touches[0].pageY - windowHalfY;targetRotationY = targetRotationOnMouseDownY + (mouseX - mouseYOnMouseDown) * 0.05;}}

在线演示源码下载