• 设为首页
  • 点击收藏
  • 手机版
    手机扫一扫访问
    迪恩网络手机版
  • 关注官方公众号
    微信扫一扫关注
    公众号

Vue中实现3D标签云的详细代码

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

预览:

代码:
页面部分:

<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!


鲜花

握手

雷人

路过

鸡蛋
该文章已有0人参与评论

请发表评论

全部评论

专题导读
上一篇:
ElementUI实现el-form表单重置功能按钮发布时间:2022-02-05
下一篇:
微信小程序页面返回传值的4种解决方案汇总发布时间:2022-02-05
热门推荐
热门话题
阅读排行榜

扫描微信二维码

查看手机版网站

随时了解更新最新资讯

139-2527-9053

在线客服(服务时间 9:00~18:00)

在线QQ客服
地址:深圳市南山区西丽大学城创智工业园
电邮:jeky_zhao#qq.com
移动电话:139-2527-9053

Powered by 互联科技 X3.4© 2001-2213 极客世界.|Sitemap