3D HTML5 Logo标志超炫酷旋转特效-白红宇

3D HTML5 Logo标志超炫酷旋转特效

阅读量：6957 次

发布时间：2019-06-27

本文共 8035 字，大约阅读时间需要 26 分钟。

今天又要为大家带来一款超酷的HTML5 Canvas 3D动画特效，是一款可以旋转的HTML5 Logo标志。画面上一共有两块可旋转的区域，第一是可旋转的背景，第二则是可旋转的Logo标志。Logo标志在旋转的时候还有3D的视觉效果，这一切我们都是在canvas上实现的。具体演示和实现过程可以看下文。

你也可以在这里查看

下面我们来简单分析一下实现这款3D动画的过程及其部分核心代码，主要由HTML代码以及Javascript代码组成。

HTML代码：

非常简单，仅仅是构造了一个canvas容器，接下来的3D动画，包括旋转的特效都将在这里绘制和实现。

Javascript代码：

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
     
       -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);}

这部分代码是整个动画的初始化代码，其中我们利用了k3d的脚本库，所以你需要在项目中引用它，关于k3d，你可以在最后的源代码中找到它。

下面是一些鼠标事件，你可以拖动鼠标来让其旋转，具体代码如下：

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;    }}

好了，一个简单的3D动画实现起来还是有点复杂的，你可以下载源代码来研究学习。

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