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可以自动旋转,鼠标高亮选中
第一步
echarts-gl 装包
- "echarts": "^5.2.0",
- "echarts-gl": "^2.0.8",
我用的是上面两个版本,最开始因为echarts-gl 和echarts 版本不对应,报错找了半天,大坑,所以一定要下载对应的版本,建议直接复制到项目中package.json文件中,然后npm i 自动装包就行了
第二步
封装成了一个插件,可以直接复制到自己项目中查看,数据为模拟数据
- <template>
- <div style="width:100%;height:100%">
- <div ref="basicDataPie" style="width:100%;height:100%"></div>
- </div>
- </template>
- <script>
- import * as echarts from "echarts";
- import "echarts-gl";
- export default {
- data() {
- return {
- data: [
- { name: "视频", value: 20, itemStyle: { color: "#0783FA" } },
- { name: "作业", value: 18, itemStyle: { color: "#07D1FA" } },
- { name: "考试", value: 22, itemStyle: { color: "#20E6A4" } },
- { name: "课件", value: 15, itemStyle: { color: "#D18161" } },
- { name: "实验", value: 25, itemStyle: { color: "#FFE649" } },
- ],
- };
- },
- mounted() {
- this.$nextTick(() => {
- this.echartsPie();
- });
- },
- methods: {
- echartsPie() {
- let hoveredIndex = "";
- let chartDom = this.$refs["basicDataPie"];
- let myChart = echarts.init(chartDom);
- const getPie3D = (pieData, internalDiameterRatio) => {
- //internalDiameterRatio:透明的空心占比
- let series = [];
- let sumValue = 0;
- let startValue = 0;
- let endValue = 0;
- let k = 1;
- pieData.sort((a, b) => {
- return b.value - a.value;
- });
- // 为每一个饼图数据,生成一个 series-surface 配置
- for (let i = 0; i < pieData.length; i++) {
- sumValue += pieData[i].value;
- let seriesItem = {
- name:
- typeof pieData[i].name === "undefined"
- ? `series${i}`
- : pieData[i].name,
- type: "surface",
- parametric: true,
- wireframe: {
- show: false,
- },
- pieData: pieData[i],
- pieStatus: {
- selected: false,
- hovered: false,
- k: k,
- },
- radius: "50%",
- center: ["10%", "10%"],
- };
-
- if (typeof pieData[i].itemStyle != "undefined") {
- let itemStyle = {};
- typeof pieData[i].itemStyle.color != "undefined"
- ? (itemStyle.color = pieData[i].itemStyle.color)
- : null;
- typeof pieData[i].itemStyle.opacity != "undefined"
- ? (itemStyle.opacity = pieData[i].itemStyle.opacity)
- : null;
- seriesItem.itemStyle = itemStyle;
- }
- series.push(seriesItem);
- }
-
- // 使用上一次遍历时,计算出的数据和 sumValue,调用 getParametricEquation 函数,
- // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation,也就是实现每一个扇形。
- for (let i = 0; i < series.length; i++) {
- endValue = startValue + series[i].pieData.value;
- series[i].pieData.startRatio = startValue / sumValue;
- series[i].pieData.endRatio = endValue / sumValue;
- series[i].parametricEquation = getParametricEquation(
- series[i].pieData.startRatio,
- series[i].pieData.endRatio,
- false,
- false,
- k,
- series[i].pieData.value
- );
- startValue = endValue;
- }
- let boxHeight = getHeight3D(series, 15); //通过传参设定3d饼/环的高度,26代表26px
- // 准备待返回的配置项,把准备好的 legendData、series 传入。
- let option = {
- backgroundColor: "#fff",
- tooltip: {
- backgroundColor: "#fff",
- formatter: (params) => {
- if (
- params.seriesName !== "mouseoutSeries" &&
- params.seriesName !== "pie3d"
- ) {
- let bfb = (
- (option.series[params.seriesIndex].pieData.endRatio -
- option.series[params.seriesIndex].pieData.startRatio) *
- 100
- ).toFixed(2);
- return (
- `${params.seriesName}<br/>` +
- `<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
- `${bfb}%`
- );
- }
- },
- },
- legend: {
- bottom: "3%",
- itemGap: 20,
- icon: "path://M0,12L12,12C12,5.37258,6.62742,0,0,0L0,12Z",
- },
- title: {
- text: "课程总课时:68",
- left: "left",
- top: "2%",
- textStyle: {
- fontWeight: 500,
- fontSize: 16,
- color: "#3D3D3D",
- },
- },
- xAxis3D: {
- min: -1,
- max: 1,
- },
- yAxis3D: {
- min: -1,
- max: 1,
- },
- zAxis3D: {
- min: -1,
- max: 1,
- },
- grid3D: {
- show: false,
- boxHeight: boxHeight, //圆环的高度
- left: 0,
- top: 0, //3d饼图的位置
- viewControl: {
- //3d效果可以放大、旋转等,请自己去查看官方配置
- alpha: 25, //角度
- distance: 250, //调整视角到主体的距离,类似调整zoom
- rotateSensitivity: 0, //设置为0无法旋转
- zoomSensitivity: 0, //设置为0无法缩放
- panSensitivity: 0, //设置为0无法平移
- autoRotate: true, //自动旋转
- },
- },
- series: series,
- };
- return option;
- };
-
- //获取3d丙图的最高扇区的高度
- const getHeight3D = (series, height) => {
- series.sort((a, b) => {
- return b.pieData.value - a.pieData.value;
- });
- return (height * 15) / series[0].pieData.value;
- };
-
- // 生成扇形的曲面参数方程,用于 series-surface.parametricEquation
- const getParametricEquation = (
- startRatio,
- endRatio,
- isSelected,
- isHovered,
- k,
- h
- ) => {
- // 计算
- let midRatio = (startRatio + endRatio) / 2;
- let startRadian = startRatio * Math.PI * 2;
- let endRadian = endRatio * Math.PI * 2;
- let midRadian = midRatio * Math.PI * 2;
- // 如果只有一个扇形,则不实现选中效果。
- if (startRatio === 0 && endRatio === 1) {
- isSelected = false;
- }
- // 通过扇形内径/外径的值,换算出辅助参数 k(默认值 1/3)
- k = typeof k !== "undefined" ? k : 1 / 3;
- // 计算选中效果分别在 x 轴、y 轴方向上的位移(未选中,则位移均为 0)
- let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
- let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
- // 计算高亮效果的放大比例(未高亮,则比例为 1)
- let hoverRate = isHovered ? 1.05 : 1;
- // 返回曲面参数方程
- return {
- u: {
- min: -Math.PI,
- max: Math.PI * 3,
- step: Math.PI / 32,
- },
- v: {
- min: 0,
- max: Math.PI * 2,
- step: Math.PI / 20,
- },
- x: function (u, v) {
- if (u < startRadian) {
- return (
- offsetX +
- Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
- );
- }
- if (u > endRadian) {
- return (
- offsetX +
- Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
- );
- }
- return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
- },
- y: function (u, v) {
- if (u < startRadian) {
- return (
- offsetY +
- Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
- );
- }
- if (u > endRadian) {
- return (
- offsetY +
- Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
- );
- }
- return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
- },
- z: function (u, v) {
- if (u < -Math.PI * 0.5) {
- return Math.sin(u);
- }
- if (u > Math.PI * 2.5) {
- return Math.sin(u) * h * 0.1;
- }
- return Math.sin(v) > 0 ? 1 * h * 0.1 : -1;
- },
- };
- };
-
- let option = getPie3D(this.data, 0.8);
- //是否需要label指引线,如果要就添加一个透明的2d饼状图并调整角度使得labelLine和3d的饼状图对齐,并再次setOption
- option.series.push({
- // name: "pie3d",
- type: "pie",
- label: {
- show: false,
- position: "inside",
- formatter: "{c}%",
- },
- // startAngle: -25, //起始角度,支持范围[0, 360]。
- clockwise: false, //饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
- radius: ["65%", "65%"],
- center: ["55%", "48%"], //指示线的位置
- itemStyle: {
- opacity: 0,
- },
- });
- option && myChart.setOption(option);
-
- myChart.on("mouseover", function (params) {
- // 准备重新渲染扇形所需的参数
- let isSelected;
- let isHovered;
- let startRatio;
- let endRatio;
- let k;
- let i;
-
- // 如果触发 mouseover 的扇形当前已高亮,则不做操作
- if (hoveredIndex === params.seriesIndex) {
- return;
-
- // 否则进行高亮及必要的取消高亮操作
- } else {
- // 如果当前有高亮的扇形,取消其高亮状态(对 option 更新)
- if (hoveredIndex !== "") {
- // 从 option.series 中读取重新渲染扇形所需的参数,将是否高亮设置为 false。
- isSelected = option.series[hoveredIndex].pieStatus.selected;
- isHovered = false;
- startRatio = option.series[hoveredIndex].pieData.startRatio;
- endRatio = option.series[hoveredIndex].pieData.endRatio;
- k = option.series[hoveredIndex].pieStatus.k;
- i =
- option.series[hoveredIndex].pieData.value ===
- option.series[0].pieData.value
- ? 35
- : 10;
- // 对当前点击的扇形,执行取消高亮操作(对 option 更新)
- option.series[hoveredIndex].parametricEquation =
- getParametricEquation(
- startRatio,
- endRatio,
- isSelected,
- isHovered,
- k,
- i
- );
- option.series[hoveredIndex].pieStatus.hovered = isHovered;
-
- // 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
- hoveredIndex = "";
- }
-
- // 如果触发 mouseover 的扇形不是透明圆环,将其高亮(对 option 更新)
- if (
- params.seriesName !== "mouseoutSeries" &&
- option.series[params.seriesIndex].pieStatus
- ) {
- // 从 option.series 中读取重新渲染扇形所需的参数,将是否高亮设置为 true。
- isSelected = option.series[params.seriesIndex].pieStatus.selected;
- isHovered = true;
- startRatio = option.series[params.seriesIndex].pieData.startRatio;
- endRatio = option.series[params.seriesIndex].pieData.endRatio;
- k = option.series[params.seriesIndex].pieStatus.k;
-
- // 对当前点击的扇形,执行高亮操作(对 option 更新)
- option.series[params.seriesIndex].parametricEquation =
- getParametricEquation(
- startRatio,
- endRatio,
- isSelected,
- isHovered,
- k,
- option.series[params.seriesIndex].pieData.value + 5
- );
- option.series[params.seriesIndex].pieStatus.hovered = isHovered;
-
- // 记录上次高亮的扇形对应的系列号 seriesIndex
- hoveredIndex = params.seriesIndex;
- }
-
- // 使用更新后的 option,渲染图表
- myChart.setOption(option);
- }
- });
- },
- },
- };
- </script>
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