多视角3D可旋转的HTML5 Logo动画

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来源：阅读：1395 次日期：2016-07-07 13:56:41

温馨提示：小编为您整理了“多视角3D可旋转的HTML5 Logo动画”,方便广大网友查阅！

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。

HTML代码

XML/HTML Code

</div>

JavaScript代码

JavaScript Code

// 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<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;

}

以上就是本文的全部内容，希望对大家的学习有所帮助。

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