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预览: 代码:
<template>
<div class="tagcloud-all"
ref="tagcloudall">
<a v-for="item in tagList" :href="item.url" rel="external nofollow" :style="'color:' + item.color + ';top: 0;left: 0;filter:none;'">{{item.name}}</a>
</div>
</template>
CSS部分:
// 标签云
.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: {
// 生成随机数
getRandomNum() {
return Math.floor(Math.random() * (255 + 1));
},
// 三角函数角度计算
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);
},
// 设置初始定位
positionAll() {
this.$nextTick(() => { // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
var phi = 0;
var theta = 0;
var max = this.mcList.length;
var aTmp = [];
var oFragment = document.createDocumentFragment();
// 随机排序
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);
}
// 坐标变换
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';
}
})
},
// 坐标更新 让标签动起来
update() {
this.$nextTick(() => { // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
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.$nextTick(() => { // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
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.$nextTick(() => { // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
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;
}
})
},
// 网络请求 拿到tagList
query() {
// 假装从接口拿回来的数据
let tagListOrg = [
{ name: '标签1', url: 'www.baidu.com' },
{ name: '标签2', url: 'www.baidu.com' },
{ name: '标签3', url: 'www.baidu.com' },
{ name: '标签4', url: 'www.baidu.com' },
{ name: '标签5', url: 'www.baidu.com' },
{ name: '标签6', url: 'www.baidu.com' },
{ name: '标签7', url: 'www.baidu.com' },
{ name: '标签8', url: 'www.baidu.com' },
{ name: '标签9', url: 'www.baidu.com' },
{ name: '标签10', url: 'www.baidu.com' },
{ name: '标签11', url: 'www.baidu.com' },
{ name: '标签12', url: 'www.baidu.com' },
{ name: '标签13', url: 'www.baidu.com' },
{ name: '标签14', url: 'www.baidu.com' },
{ name: '标签15', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签16', url: 'www.baidu.com' },
{ name: '标签17', url: 'www.baidu.com' }
];
// 给tagList添加随机颜色
tagListOrg.forEach(item => {
item.color = "rgb(" + this.getRandomNum() + "," + this.getRandomNum() + "," + this.getRandomNum() + ")";
})
this.tagList = tagListOrg;
this.onReady();
},
// 生成标签云
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); // 定时器执行 不能写setInterval(this.update(), 30)
})
}
},
created() {
this.$nextTick(() => {
this.query();
})
}
}
到此这篇关于Vue中实现3D标签云的文章就介绍到这了,更多相关Vue 3D标签云内容请搜索极客世界以前的文章或继续浏览下面的相关文章希望大家以后多多支持极客世界！ |
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