基於css3新屬性transform，實現3d立方體的旋轉
通過原生JS，點擊事件，鼠標按下、鼠標抬起和鼠標移動事件，實現3d立方體的拖動旋轉，並將旋轉角度實時的反應至界面上顯示
實現原理：通過獲取鼠標點擊屏幕時的坐標和鼠標移動時的坐標，來獲得鼠標在X軸、Y軸移動的距離，將距離實時賦值給transform屬性
從而通過改變transform：rotate屬性值來達到3d立方體旋轉的效果
HTML代碼塊：
<body>
<input type="button" class="open" value="點擊散開"/>
<input type="text" class="xNum" value="0"/>//X軸旋轉角度
<input type="text" class="yNum" value="0"/>//Y軸旋轉角度
<input type="text" class="zNum"/>
<div class="big_box">
<div class="box">
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
<span>5</span>
<span>6</span>
</div>
</div>
</body>
CSS代碼塊：
<style>
body{cursor: url("img/openhand1.png"),auto;}
.big_box{
width: 500px;
height: 500px;
margin: 200px auto;
}
.box{
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
-ms-transform-style: preserve-3d;
transform-style: preserve-3d;
transform-origin:100px 100px 00px;
position: relative;
transform: rotatex(0deg) rotatey(0deg) rotatez(0deg)scale3d(0.7,0.7,0.7);
}
.box span{
transition: all 1s linear;
}
span{
display: block;
position: absolute;
width: 200px;
height: 200px;
box-sizing: border-box;
border:1px solid #999;
/*opacity: 0.7;*/
text-align: center;
line-height: 200px;
font-size: 60px;
font-weight: 700;
border-radius: 12%;
}
.box span:nth-child(1){
background-color: deepskyblue;
transform-origin: left;
transform: rotatey(-90deg) translatex(-100px);//左
}
.box span:nth-child(2){
background-color: red;
transform-origin: right;
transform: rotatey(90deg) translatex(100px) ;//右
}
.box span:nth-child(3){
background-color: green;
transform-origin: top;
transform: rotatex(90deg) translatey(-100px) ;//上
}
.box span:nth-child(4){
background-color: #6633FF;
transform-origin: bottom;
transform: rotatex(-90deg) translatey(100px);//下
}
.box span:nth-child(5){
background-color: gold;
transform: translatez(-100px);//後
}
.box span:nth-child(6){
background-color: #122b40;
transform: translatez(100px);//前
}
.box:hover span{
opacity: 0.3;
}
.box:hover{
animation-play-state:paused;//設置動畫暫停
}
</style>
JS代碼塊：
<script>
move();
clickBox();
//鼠標按下且移動時觸發，
function move(){
var body = document.querySelector("body");
var box = document.querySelector(".box");
var xNum =document.querySelector(".xNum");
var yNum =document.querySelector(".yNum");
var x = 0,y = 0,z = 0;
var xx = 0,yy = 0;
var xArr = [],yArr = [];
window.onmousedown = function (e) {//鼠標按下事件
body.style.cursor = 'url("img/closedhand1.png"),auto';
xArr[0] = e.clientX/2;//獲取鼠標點擊屏幕時的坐標
yArr[0] = e.clientY/2;
window.onmousemove = function (e) {//鼠標移動事件————當鼠標按下且移動時觸發
xArr[1] = e.clientX/2;//獲取鼠標移動時第一個點的坐標
yArr[1] = e.clientY/2;
yy += xArr[1] - xArr[0];//獲得鼠標移動的距離
xx += yArr[1] - yArr[0];
xNum.value = xx+"°";//將所獲得距離數字賦值給input顯示旋轉角度
yNum.value = yy+"°";
//將旋轉角度寫入transform中
box.style.transform = "rotatex("+xx+"deg) rotatey("+yy+"deg) rotatez(0deg)scale3d(0.7,0.7,0.7)";
xArr[0] = e.clientX/2;
yArr[0] = e.clientY/2;
}
};
window.onmouseup = function () {//鼠標抬起事件————用於清除鼠標移動事件，
body.style.cursor = 'url("img/openhand1.png"),auto';
window.onmousemove = null;
}
}
//點擊事件、負責立方體盒子的六面伸展
function clickBox(){
var btn = document.querySelector(".open");
var box = document.querySelector(".box");
var son = box.children;
var value = 0;
//存儲立方體散開時的transform參數
var arr0 = ["rotatey(-90deg) translatex(-100px)","rotatey(90deg) translatex(100px)","rotatex(90deg) translatey(-100px)",
"rotatex(-90deg) translatey(100px)","translatez(-100px)","translatez(100px)"];
//存儲立方體合並時的transform參數
var arr1 = ["rotatey(-90deg) translatex(-100px)translatez(100px)","rotatey(90deg) translatex(100px)translatez(100px)",
"rotatex(90deg) translatey(-100px)translatez(100px)","rotatex(-90deg) translatey(100px)translatez(100px)","translatez(-200px)","translatez(200px)"];
btn.onclick = function(){
if(value == 0){
value = 1;
btn.value = "點擊合並";
for(var i=0;i<arr1.length;i++){
son[i].style.transform = arr1[i];
console.log(son[i])
}
}else if(value == 1){
value = 0;
btn.value = "點擊散開";
for(var j=0;j<arr0.length;j++){
son[j].style.transform = arr0[j];
console.log(j);
}
}
};
}
</script>