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一、实现的效果
二、具体步骤
1.安装依赖
npm install echarts
2.引入echarts
import * as echarts from 'echarts';
注意:这里需要用到echarts-gl,必须单独引入才可以
import 'echarts-gl';
3.echarts部分代码
我知道这部分内容很多,但只要cv去用就可以了,getParametricEquation这个函数不用改(我也不知道咋改。。。反正我没动过);getPie3D函数根据自己的需求稍微改一下option配置就好,其余的可以不用管
- // 颜色列表
- const colorList = [
- 'rgba(76, 139, 241, 0.9)',
- 'rgba(101, 193, 241, 0.9)',
- 'rgba(249, 215, 114, 0.9)',
- 'rgba(179, 186, 195, 0.9)',
- 'rgba(255, 255, 255, 0.9)',
- 'rgba(145, 186, 217, 0.9)',
- ];
-
- // 生成扇形的曲面参数方程,用于 series-surface.parametricEquation
- function getParametricEquation(startRatio: any, endRatio: any, isSelected: any, isHovered: any, k: any, h: any) {
- // 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;
- // }
- 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.sin(midRadian) * 0.1 : 0;
- let offsetY = isSelected ? Math.cos(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: any, v: any) {
- 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: any, v: any) {
- 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: any, v: any) {
- 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;
- },
- };
- }
-
- // 生成模拟 3D 饼图的配置项
- function getPie3D(pieData: any, internalDiameterRatio: any) {
- let series = [];
- let sumValue = 0;
- let startValue = 0;
- let endValue = 0;
- let legendData = [];
- let k = typeof internalDiameterRatio !== 'undefined' ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio) : 1 / 3;
-
- // 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: any = {
- 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: 1 / 10,
- },
- };
-
- if (typeof pieData[i].itemStyle != 'undefined') {
- let itemStyle: any = {};
-
- 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;
- legendData.push(series[i].name);
- }
- series.push({
- name: 'mouseoutSeries',
- type: 'surface',
-
- parametric: true,
- wireframe: {
- show: false,
- },
- itemStyle: {
- opacity: 0.2,
- color: 'rgba(165, 247, 253, 1)',
- },
- parametricEquation: {
- u: {
- min: 0,
- max: Math.PI * 2,
- step: Math.PI / 20,
- },
- v: {
- min: 0,
- max: Math.PI / 4,
- step: Math.PI / 20,
- },
- x: function (u: any, v: any) {
- return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2.5;
- },
- y: function (u: any, v: any) {
- return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2.5;
- },
- z: function (u: any, v: any) {
- return Math.cos(v) > 0 ? -3 : -3;
- },
- },
- });
-
- // 准备待返回的配置项,把准备好的 legendData、series 传入。
- let option = {
- legend: {
- icon: 'circle',
- orient: 'vertical',
- data: pieData.map((dItem: any, dIndex: any) => {
- return {
- ...dItem,
- textStyle: {
- rich: {
- percent: {
- color: colorList[dIndex],
- },
- },
- },
- };
- }),
- right: '5%',
- top: '20%',
- itemGap: 10,
- itemWidth: 12,
- itemHeight: 12,
- selectedMode: false, // 关闭图例选择
- textStyle: {
- color: '#fff',
- fontSize: 14,
- fontFamily: 'Source Han Sans CN',
- rich: {
- name: {
- color: '#FFF',
- fontSize: 18,
- width: 50,
- padding: [0, 0, 0, 10],
- },
- value: {
- color: '#2BDFD4',
- fontSize: 20,
- width: 50,
- padding: [0, 0, 0, 20],
- },
- percent: {
- color: '#2BDFD4',
- fontSize: 24,
- padding: [0, 0, 0, 20],
- },
- unit: {
- color: '#ACDCE4',
- fontSize: 24,
- padding: [0, 0, 0, 5],
- },
- },
- },
- formatter: (name: any) => {
- let obj = pieData.find((item: any) => item.name === name);
- let datas = pieData;
- let total = 0;
- let target = obj.value;
- for (let i = 0; i < datas.length; i++) {
- total += Number(datas[i].value);
- }
- const arr = [`{name|${name}}{value|${obj.value}次}{percent|${((target / total) * 100).toFixed(0)}}{unit|%}`];
- return arr.join('');
- },
- },
- xAxis3D: {},
- yAxis3D: {},
- zAxis3D: {},
- grid3D: {
- viewControl: {
- autoRotate: true, // 自动旋转
- },
- left: '4%',
- width: '45%',
- show: false,
- boxHeight: 30,
- // boxWidth和boxDepth这两个属性值保持一致,才可以在调整饼图宽度的时候保持水平,不然就会歪歪扭扭
- boxWidth: 130,
- boxDepth: 130,
- },
- series: series,
- };
- return option;
- }
-
- const data = [
- {
- name: 'PM2.5',
- value: 134,
- },
- {
- name: 'VOC',
- value: 56,
- },
- {
- name: 'T',
- value: 57,
- },
- {
- name: 'CH2O',
- value: 36,
- },
- {
- name: 'CO2',
- value: 51,
- },
- {
- name: 'RH',
- value: 51,
- },
- ];
-
- const serData = data.map((dItem, index) => {
- return {
- ...dItem,
- value: Number(dItem.value),
- itemStyle: {
- color: colorList[index],
- },
- };
- });
-
- // 传入数据生成 option
- let option = getPie3D(serData, 0.7);
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