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這篇“HTML5怎么實現多視角3D可旋轉的標志動畫”文章的知識點大部分人都不太理解,所以小編給大家總結了以下內容,內容詳細,步驟清晰,具有一定的借鑒價值,希望大家閱讀完這篇文章能有所收獲,下面我們一起來看看這篇“HTML5怎么實現多視角3D可旋轉的標志動畫”文章吧。
HTML代碼
XML / HTML代碼將內容復制到文本
< div class = “鏈接疊加” >
</ div >
< canvas id = “ canvas” style = “ background-color:#ddd” > </ canvas >
JavaScript代碼
JavaScript代碼將內容復制到
//綁定到窗口onload處理程序
window.addEventListener('load' ,onloadHandler, false );
/ **
*窗口加載處理程序
* /
函數 onloadHandler()
{
var canvas = document.getElementById('canvas' );
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
var k3dmain = new K3D.Controller(canvas, true );
//生成3D對象
var obj1 = new K3D.K3DObject();
與 (obj1)
{
drawmode = “ solid” ;
shademode = “ lightsource” ;
sortmode = “未排序” ;
addphi = -0.5;
大約= -90;
perslevel = 1000;
在里面(
[{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}],
[],
[{顏色:[227,76,38],頂點:[0,1,2,3,0]},{顏色:[235,235,235],頂點:[4,5,6,7,8,9,10 ,11,4]},{顏色:[235,235,235],頂點:[12,13,14,15,16,17,12]}]
);
}
k3dmain.addK3DObject(obj1);
var obj2 = new K3D.K3DObject();
與 (obj2)
{
drawmode = “ solid” ;
shademode = “ lightsource” ;
sortmode = “未排序” ;
addphi = -0.5;
大約= -90;
perslevel = 1000;
在里面(
[{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}]],
[],
[{顏色:[227,76,38],頂點:[0,1,2,3,0]},{顏色:[240,101,41],頂點:[4,5,6,7,4]} ,{顏色:[235,235,235],頂點:[8,9,10,11,8]}},{顏色:[235,235,235],頂點:[12,13,14,15,16,17,18,19,12 ]}]
);
}
k3dmain.addK3DObject(obj2);
var obj3 = new K3D.K3DObject();
與 (obj3)
{
drawmode = “ solid” ;
shademode = “ lightsource” ;
sortmode = “未排序” ;
addphi = -0.5;
大約= -90;
perslevel = 1000;
在里面(
[{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}],
[],
[{顏色:[227,76,38],頂點:[0,1,2,3,0]},{顏色:[235,235,235],頂點:[4,5,6,7,8,9,10 ,11,4]},{顏色:[235,235,235],頂點:[12,13,14,15,16,17,12]}]
);
}
k3dmain.addK3DObject(obj3);
var obj4 = new K3D.K3DObject();
與 (obj4)
{
drawmode = “ solid” ;
shademode = “ lightsource” ;
sortmode = “未排序” ;
addphi = -0.5;
大約= -90;
perslevel = 1000;
在里面(
[{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}],
[],
[{顏色:[227,76,38],頂點:[0,1,2,3,0]},{顏色:[240,101,41],頂點:[4,5,6,7,4]} ,{顏色:[235,235,235],頂點:[8,9,10,11,8]}},{顏色:[235,235,235],頂點:[12,13,14,15,16,17,18,19,12 ]}]
);
}
k3dmain.addK3DObject(obj4);
var objBase = new K3D.K3DObject();
與 (objBase)
{
drawmode = “ solid” ;
shademode = “ lightsource” ;
sortmode = “未排序” ;
addphi = -0.5;
大約= -90;
perslevel = 1000;
在里面(
[{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:80, y:20,z:0}],
[],
[{顏色:[227,76,38],頂點:[0,2,1,0]},{顏色:[227,76,38],頂點:[0,3,2,0]}]
);
}
k3dmain.addK3DObject(objBase);
var objHtml = 新的 K3D.K3DObject();
與 (objHtml)
{
drawmode = “ solid” ;
shademode = “ lightsource” ;
// sortmode =“ unsorted”;
顏色= [64,64,64];
雙面= 真;
addphi = -0.5;
大約= 100;
比例= 0.75;
perslevel = 1000;
在里面(
[{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]},{頂點:[20,21,22,23,24,25,26,27,28,29,30,31,20]},{頂點:[32,33,34,35 ,36,37,32]}]
);
}
k3dmain.addK3DObject(objHtml);
//添加渲染循環回調
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 = 函數()
{
//手動清除bg-因為我們要渲染一些額外的東西
ctx.clearRect(0,0,canvas.width,canvas.height);
//在K3D進行3D渲染之前繪制bg效果
ctx.save();
ctx.translate(canvas.width / 2,canvas.height / 2);
ctx.rotate(rotationOffset);
//第一次填充-外部光線
var RAYCOUNT = 24;
ctx.fillStyle = “ #eee” ;
ctx.beginPath();
對于 (var i = 0; i <RAYCOUNT; i ++)
{
//旋轉上下文
ctx.rotate(TWOPI / RAYCOUNT);
ctx.moveTo(0,0);
ctx.lineTo(-20,len);
ctx.lineTo(20,len);
}
ctx.closePath();
ctx.fill();
//第二遍填充-內部光線
ctx.fillStyle = “ #fff ” ;
ctx.beginPath();
對于 (var i = 0; i <RAYCOUNT; i ++)
{
//旋轉上下文
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;
//將用戶互動應用于輪播
對于 (var i = 0,objs = k3dmain.objects; i <objs.length; i ++)
{
objs [i] .ophi + = targetRotationX;
}
如果 (targetRotationX> -0.5)targetRotationX-= 0.05;
否則如果 (targetRotationX <-0.55)targetRotationX + = 0.05;
如果 (targetRotationX> -0.55 && targetRotationX <-0.5)targetRotationX = -0.5;
};
//開始演示循環
k3dmain.paused = true ;
setInterval(function (){k3dmain.tick()},1000/60);
}
//從Doob先生http://mrdoob.com/借來的漂亮的拖動/觸摸事件捕獲代碼
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 );
函數 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;
}
函數 onDocumentMouseMove(event)
{
mouseX = event.clientX-windowHalfX;
targetRotationX = targetRotationOnMouseDownX +(mouseX-mouseXOnMouseDown)* 0.02;
mouseY = event.clientY-windowHalfY;
targetRotationY = targetRotationOnMouseDownY +(mouseY-mouseYOnMouseDown)* 0.02;
}
函數 onDocumentMouseUp(event)
{
document.removeEventListener('mousemove' ,onDocumentMouseMove, false );
document.removeEventListener('mouseup' ,onDocumentMouseUp, false );
document.removeEventListener('mouseout' ,onDocumentMouseOut, false );
}
函數 onDocumentMouseOut(event)
{
document.removeEventListener('mousemove' ,onDocumentMouseMove, false );
document.removeEventListener('mouseup' ,onDocumentMouseUp, false );
document.removeEventListener('mouseout' ,onDocumentMouseOut, false );
}
函數 onDocumentTouchStart(event)
{
如果 (event.touches.length == 1)
{
event.preventDefault();
mouseXOnMouseDown = event.touches [0] .pageX-windowHalfX;
targetRotationOnMouseDownX = targetRotationX;
mouseYOnMouseDown = event.touches [0] .pageY-windowHalfY;
targetRotationOnMouseDownY = targetRotationY;
}
}
函數 onDocumentTouchMove(event)
{
如果 (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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