echarts 3d饼图
<template> <div ref="myChart" :class="className" :style="{ height: height, width: width }" /> </template> <script> import * as echarts from "echarts"; import "echarts-gl"; export default { props: { className: { type: String, default: "container", }, width: { type: String, default: "100%", }, height: { type: String, default: "800px", }, datalist: { type: Array, default: () => { return []; }, }, }, data() { return { chart: null, fontSize: 14, scale: 1, optionAll: 0, }; }, watch: { datalist: { handler() { this.initChart(); }, deep: true, }, }, mounted() { this.initChart(); window.addEventListener("resize", () => { this.initChart(); }); }, methods: { initChart() { let that = this; that.scale = document.documentElement.clientWidth / 1280; const myChart = echarts.init(this.$refs.myChart); const data = this.datalist; for (let item of data) { that.optionAll = this.optionAll + item.value; } // 生成扇形的曲面参数方程,用于 series-surface.parametricEquation function 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; }, }; } // 生成模拟 3D 饼图的配置项 function getPie3D(pieData, internalDiameterRatio) { 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 = { 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, }, }; 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; legendData.push(series[i].name); } // 补充一个透明的圆环,用于支撑高亮功能的近似实现。 series.push({ name: "mouseoutSeries", type: "pie", labelLine: { length: 20, lineStyle: { color: "#ffffff", }, }, tooltip: { show: false, }, label: { show: true, position: "outside", rich: { b: { color: "#FFFFFF", fontSize: 7 * that.scale, }, d: { color: "#FFFFFF", fontSize: 7 * that.scale, }, }, formatter: "{b|{b}} {d|{d} %}", }, radius: ["75%", "75%"], center: ["50%", "50%"], parametric: false, wireframe: { show: false, }, itemStyle: { opacity: 1, }, data: data, parametricEquation: { u: { min: 0, max: Math.PI * 2, step: Math.PI / 20, }, v: { min: 0, max: Math.PI, step: Math.PI / 20, }, x: function (u, v) { return Math.sin(v) * Math.sin(u) + Math.sin(u); }, y: function (u, v) { return Math.sin(v) * Math.cos(u) + Math.cos(u); }, z: function (u, v) { return Math.cos(v) > 0 ? 0.1 : -0.1; }, }, }); // 准备待返回的配置项,把准备好的 legendData、series 传入。 let option = { tooltip: { formatter: (params) => { if (params.seriesName !== "mouseoutSeries") { return `${params.seriesName} ${( (option.series[params.seriesIndex].pieData.value / that.optionAll) * 100 ).toFixed(2)} %`; } }, }, xAxis3D: { min: -1, max: 1, }, yAxis3D: { min: -1, max: 1, }, zAxis3D: { min: -1, max: 1, }, grid3D: { show: false, boxHeight: 10, viewControl: { //3d效果可以放大、旋转等,请自己去查看官方配置 alpha: 30, rotateSensitivity: 0, zoomSensitivity: 0, panSensitivity: 0, autoRotate: false, }, //后处理特效可以为画面添加高光、景深、环境光遮蔽(SSAO)、调色等效果。可以让整个画面更富有质感。 postEffect: { //配置这项会出现锯齿,请自己去查看官方配置有办法解决 enable: true, bloom: { enable: true, bloomIntensity: 0.1, }, SSAO: { enable: true, quality: "medium", radius: 2, }, }, }, series: series, }; return option; } // 传入数据生成 option let option = getPie3D(data, 0.59); myChart.setOption(option); // 监听鼠标事件,实现饼图选中效果(单选),近似实现高亮(放大)效果。 let hoveredIndex = ""; // 监听 mouseover,近似实现高亮(放大)效果 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; // 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; // 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, option.series[hoveredIndex].pieData.value ); 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") { // 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> <style scoped lang="less"> .highcharts-tooltip { font-size: 37px; } </style>
组件调用
<div class="img1"> <piechartKj3D :datalist="cyData" width="100%" height="80%" style="margin-top: 10%" ></piechartKj3D> </div>
cyData: [ { name: "装备制造:", value: 37, }, { name: "生物医药:", value: 44, }, { name: "其他:", value: 32, }, { name: "电子信息技术:", value: 16, }, { name: "涉水环保:", value: 23, }, { name: "新材料:", value: 13, }, ],