多元視角3D可旋轉的HTML5 Logo動畫_html5教學技巧-H5教程-PHP中文網

這是一款基於HTML5和CSS3的3D動畫特效，與之前的3D特效不同的是，這款是完全用HTML5特性實現的，而並非用多張圖片疊加起來。這款3D動畫還有一個特點是可以無限的旋轉，從而可以從多個視角來觀察HTML5 Logo。

線上示範 原始碼下載

HTML程式碼

XML/HTML Code複製內容到剪貼簿

div class=class=class" >>
div>
canvas id="canvas" style="background-color:#ddd">canvas>

JavaScript程式碼

JavaScript Code

複製內容到剪貼簿

//綁定到視窗載入處理程序
window.addEventListener('load', onloadHandler, false
/**
* 視窗載入處理程序
*/
函數 onloadHandler()
var canvas = document.getElementById('canvas' canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
var k3dmain = 新新新
新 3D.Controller>
//產生 3D 物件
var
new 3D.K3d(3D.K33);
(obj1)
{ 繪圖模式 =
; 著色模式 =
; sortmode =
;
addphi = -0.5;
約= -90；
每等級 = 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}],
[],
[{顏色:[227,76,38],頂點:[0,1,2,3,0]},{顏色:[235,235,235],頂點:[4,5,67 ,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
與 (obj2)
「實心」;
"光源";
「未排序」;
var obj3 = new 3D.K3D.
(obj3) {
繪圖模式 =
; 著色模式 =
; sortmode =
; addphi = -0.5;
約= -90；
每等級 = 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}],
[],
[{顏色:[227,76,38],頂點:[0,1,2,3,0]},{顏色:[235,235,235],頂點:[4,5,67 ,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 3D.K3D.
與 (obj4)
「實心」;
"光源";
「未排序」;
var objBase = new>
(objBase) {
繪圖模式 =
; 著色模式 =
; sortmode =
; addphi = -0.5;
約= -90；
每等級 = 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}],
[],
[{顏色:[227,76,38],頂點:[0,2,1,0]},{顏色:[227,76,38],頂點:[0,3,22 ,0]}]
）；
}
k3dmain.addK3DObject(objBase);
var objHtml = new
與
繪圖模式 = 「實心」
著色模式 = "光源"
//sortmode = 「未排序」;
雙面= true
}
k3dmain.addK3DObject(objHtml);
//新增渲染循環回呼
var ctx = canvas.getContext('2d'
var rotationOffset = 0;
var len = (canvas.height > canvas.width ? vas.height :height > canvas.width ? k3dmain.clearBackground =
; k3dmain.callback =
() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.save();
ctx.translate(canvas.width/2, canvas.height/2);
ctx.rotate(rotationOffset);
射線計數 = 24； ctx.fillStyle =
; ctx.beginPath();
(varO {
//旋轉情境
ctx.rotate(TWOPI / RAYCOUNT);
ctx.closePath();
ctx.fill();
//第二個填充通道 - 內部光線
ctx.fillStyle = "#fff";
ctx.beginPath();
for (varO
//旋轉情境
//將使用者互動套用於旋轉
for (var i=0, )
if (targetRotationX > -0.5) targetRotationX -= 0.05; >
if if
if (targetRotationX > -0.55 && }；
//開始示範循環
k3dmain.paused = true
; setInterval(函數
(){k3dmain.tick()}, 1000/60); }
//從杜布先生http://mrdoob.com/借來的漂亮的拖曳/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, document.addEventListener(
, onDocumentTouchStart, false document.addEventListener('touchmove'
false
onDocumentMouseDown( event ) {
event.preventDefault();
document.addEventListener(
, onDocumentMouseMove,
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( 事件 )
{
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 )
'mousemove', onDocumentMouseMove, false document.removeEventListener(
'mouseup', onDocumentMouseUp, false; document.removeEventListener(
'mouseout', onDocumentMouseOut, false; }
onDocumentTouchStart( event ) {
(event.touches.length == 1) {
event.preventDefault();
mouseXOnMouseDown = event.touches[0].pageX - windowHalfX;
targetRotationOnMouseDownX = targetRotationX;
mouseYOnMouseDown = event.touches[0].pageY - windowHalfY；
targetRotationOnMouseDownY = targetRotationY;
}
}
onDocumentTouchMove( 事件 ) {
(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;
}
}