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這篇文章主要講解了“Vue中怎么實現3D標簽云”，文中的講解內容簡單清晰，易于學習與理解，下面請大家跟著小編的思路慢慢深入，一起來研究和學習“Vue中怎么實現3D標簽云”吧！
預覽:
代碼:
頁面部分:
<template>
<div class="tagcloud-all"
ref="tagcloudall">
<a v-for="item in tagList" :href="item.url" rel="external nofollow" :>{{item.name}}</a>
</div>
</template>CSS部分:
// 標簽云
.tagcloud-all {
position: relative;
a {
position: absolute;
top: 0px;
left: 0px;
color: #fff;
font-weight: bold;
text-decoration: none;
padding: 3px 6px;
&:hover {
color: #FF0000;
letter-spacing: 2px;
}
}
}JS部分:
export default {
name: "tagcloud",
data() {
return {
tagList: [],
radius: 120,
dtr: Math.PI / 180,
d: 300,
mcList: [],
active: false,
lasta: 1,
lastb: 1,
distr: true,
tspeed: 10,
size: 250,
mouseX: 0,
mouseY: 0,
howElliptical: 1,
oList: null,
oA: null,
sa: 0,
ca: 0,
sb: 0,
cb: 0,
sc: 0,
cc: 0
}
},
methods: {
// 生成隨機數
getRandomNum() {
return Math.floor(Math.random() * (255 + 1));
},
// 三角函數角度計算
sineCosine(a, b, c) {
this.sa = Math.sin(a * this.dtr);
this.ca = Math.cos(a * this.dtr);
this.sb = Math.sin(b * this.dtr);
this.cb = Math.cos(b * this.dtr);
this.sc = Math.sin(c * this.dtr);
this.cc = Math.cos(c * this.dtr);
},
// 設置初始定位
positionAll() {
this.$nextTick(() => { // 注意: 所有的在onReady方法中執行的方法都需要$nextTick確保所有的標簽都已經渲染
var phi = 0;
var theta = 0;
var max = this.mcList.length;
var aTmp = [];
var oFragment = document.createDocumentFragment();
// 隨機排序
for (let i = 0; i < this.tagList.length; i++) {
aTmp.push(this.oA[i]);
}
aTmp.sort(() => {
return Math.random() < 0.5 ? 1 : -1;
});
for (let i = 0; i < aTmp.length; i++) {
oFragment.appendChild(aTmp[i]);
}
this.oList.appendChild(oFragment);
for (let i = 1; i < max + 1; i++) {
if (this.distr) {
phi = Math.acos(-1 + (2 * i - 1) / max);
theta = Math.sqrt(max * Math.PI) * phi;
} else {
phi = Math.random() * (Math.PI);
theta = Math.random() * (2 * Math.PI);
}
// 坐標變換
this.mcList[i - 1].cx = this.radius * Math.cos(theta) * Math.sin(phi);
this.mcList[i - 1].cy = this.radius * Math.sin(theta) * Math.sin(phi);
this.mcList[i - 1].cz = this.radius * Math.cos(phi);
this.oA[i - 1].style.left = this.mcList[i - 1].cx + this.oList.offsetWidth / 2 - this.mcList[i - 1].offsetWidth / 2 + 'px';
this.oA[i - 1].style.top = this.mcList[i - 1].cy + this.oList.offsetHeight / 2 - this.mcList[i - 1].offsetHeight / 2 + 'px';
}
})
},
// 坐標更新 讓標簽動起來
update() {
this.$nextTick(() => { // 注意: 所有的在onReady方法中執行的方法都需要$nextTick確保所有的標簽都已經渲染
var a;
var b;
if (this.active) {
a = (-Math.min(Math.max(-this.mouseY, -this.size), this.size) / this.radius) * this.tspeed;
b = (Math.min(Math.max(-this.mouseX, -this.size), this.size) / this.radius) * this.tspeed;
} else {
a = this.lasta * 0.98;
b = this.lastb * 0.98;
}
this.lasta = a;
this.lastb = b;
if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
return
}
var c = 0;
this.sineCosine(a, b, c);
for (var j = 0; j < this.mcList.length; j++) {
var rx1 = this.mcList[j].cx;
var ry1 = this.mcList[j].cy * this.ca + this.mcList[j].cz * (-this.sa);
var rz1 = this.mcList[j].cy * this.sa + this.mcList[j].cz * this.ca;
var rx2 = rx1 * this.cb + rz1 * this.sb;
var ry2 = ry1;
var rz2 = rx1 * (-this.sb) + rz1 * this.cb;
var rx3 = rx2 * this.cc + ry2 * (-this.sc);
var ry3 = rx2 * this.sc + ry2 * this.cc;
var rz3 = rz2;
this.mcList[j].cx = rx3;
this.mcList[j].cy = ry3;
this.mcList[j].cz = rz3;
var per = this.d / (this.d + rz3);
this.mcList[j].x = (this.howElliptical * rx3 * per) - (this.howElliptical * 2);
this.mcList[j].y = ry3 * per;
this.mcList[j].scale = per;
this.mcList[j].alpha = per;
this.mcList[j].alpha = (this.mcList[j].alpha - 0.6) * (10 / 6);
}
this.doPosition();
this.depthSort();
})
},
//
doPosition() {
this.$nextTick(() => { // 注意: 所有的在onReady方法中執行的方法都需要$nextTick確保所有的標簽都已經渲染
var l = this.oList.offsetWidth / 2;
var t = this.oList.offsetHeight / 2;
for (var i = 0; i < this.mcList.length; i++) {
this.oA[i].style.left = this.mcList[i].cx + l - this.mcList[i].offsetWidth / 2 + 'px';
this.oA[i].style.top = this.mcList[i].cy + t - this.mcList[i].offsetHeight / 2 + 'px';
this.oA[i].style.fontSize = Math.ceil(12 * this.mcList[i].scale / 2) + 8 + 'px';
// this.oA[i].style.filter = "alpha(opacity=" + 100 * this.mcList[i].alpha + ")";
this.oA[i].style.opacity = this.mcList[i].alpha;
}
})
},
//
depthSort() {
this.$nextTick(() => { // 注意: 所有的在onReady方法中執行的方法都需要$nextTick確保所有的標簽都已經渲染
var aTmp = [];
for (let i = 0; i < this.oA.length; i++) {
aTmp.push(this.oA[i]);
}
aTmp.sort(function (vItem1, vItem2) {
if (vItem1.cz > vItem2.cz) {
return -1;
} else if (vItem1.cz < vItem2.cz) {
return 1;
} else {
return 0;
}
});
for (let i = 0; i < aTmp.length; i++) {
aTmp[i].style.zIndex = i;
}
})
},
// 網絡請求 拿到tagList
query() {
// 假裝從接口拿回來的數據
let tagListOrg = [
{ name: '標簽1', url: 'www.baidu.com' },
{ name: '標簽2', url: 'www.baidu.com' },
{ name: '標簽3', url: 'www.baidu.com' },
{ name: '標簽4', url: 'www.baidu.com' },
{ name: '標簽5', url: 'www.baidu.com' },
{ name: '標簽6', url: 'www.baidu.com' },
{ name: '標簽7', url: 'www.baidu.com' },
{ name: '標簽8', url: 'www.baidu.com' },
{ name: '標簽9', url: 'www.baidu.com' },
{ name: '標簽10', url: 'www.baidu.com' },
{ name: '標簽11', url: 'www.baidu.com' },
{ name: '標簽12', url: 'www.baidu.com' },
{ name: '標簽13', url: 'www.baidu.com' },
{ name: '標簽14', url: 'www.baidu.com' },
{ name: '標簽15', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽16', url: 'www.baidu.com' },
{ name: '標簽17', url: 'www.baidu.com' }
];
// 給tagList添加隨機顏色
tagListOrg.forEach(item => {
item.color = "rgb(" + this.getRandomNum() + "," + this.getRandomNum() + "," + this.getRandomNum() + ")";
})
this.tagList = tagListOrg;
this.onReady();
},
// 生成標簽云
onReady() {
this.$nextTick(() => {
this.oList = this.$refs.tagcloudall;
this.oA = this.oList.getElementsByTagName('a')
var oTag = null;
for (var i = 0; i < this.oA.length; i++) {
oTag = {};
oTag.offsetWidth = this.oA[i].offsetWidth;
oTag.offsetHeight = this.oA[i].offsetHeight;
this.mcList.push(oTag);
}
this.sineCosine(0, 0, 0);
this.positionAll();
this.oList.onmouseover = () => {
this.active = true;
}
this.oList.onmouseout = () => {
this.active = false;
}
this.oList.onmousemove = (event) => {
var oEvent = window.event || event;
this.mouseX = oEvent.clientX - (this.oList.offsetLeft + this.oList.offsetWidth / 2);
this.mouseY = oEvent.clientY - (this.oList.offsetTop + this.oList.offsetHeight / 2);
this.mouseX /= 5;
this.mouseY /= 5;
}
setInterval(() => {
this.update()
}, 30); // 定時器執行 不能寫setInterval(this.update(), 30)
})
}
},
created() {
this.$nextTick(() => {
this.query();
})
}
}感謝各位的閱讀，以上就是“Vue中怎么實現3D標簽云”的內容了，經過本文的學習后，相信大家對Vue中怎么實現3D標簽云這一問題有了更深刻的體會，具體使用情況還需要大家實踐驗證。這里是億速云，小編將為大家推送更多相關知識點的文章，歡迎關注！
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