多视角3D可旋转的HTML5Logo动画_html5教程技巧

多视角3D可旋转的HTML5Logo动画_html5教程技巧

多视角3D可旋转的HTML5Logo动画_html5教程技巧: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/H

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// 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 = [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
 
 { 
 
 // 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; 
 
 } 
 
}