多视角3D可旋转的HTML5Logo动画_html5教程技巧_动视

多视角3D可旋转的HTML5Logo动画_html5教程技巧

2020-11-27 15:19:55 责编:小采

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

XML/HTML Code复制内容到剪贴板

JavaScript代码

JavaScript Code复制内容到剪贴板


 // bind to window onload handler 
 window.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 = [,,]; 
  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
 
 { 
  // 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
 
 { 
  // 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[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; 
  } 
 } 



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