大屏项目：react中实现3d效果的环形图包括指引线

参考链接3d环形图

项目需求

需要在大屏上实现一个3d的环形图，并且自带指引线，指引线的颜色和每段数据的颜色一样，文本内容变成白色，数字内容变成和指引线一样的颜色

实现方式

    // 返回曲面参数方程// 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;// }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;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 fakeData=10;let linesSeries = []; // line3D模拟label指示线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 += fakeData;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: 1 / 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 + fakeData;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,fakeData);startValue = endValue;// 计算label指示线的起始和终点位置let midRadian = (series[i].pieData.endRatio + series[i].pieData.startRatio) * Math.PI;let posX = Math.cos(midRadian) * (1 + Math.cos(Math.PI / 2));let posY = Math.sin(midRadian) * (1 + Math.cos(Math.PI / 2));let posZ = Math.log(Math.abs(fakeData + 1)) * 0.1;let flag = ((midRadian >= 0 && midRadian <= Math.PI / 2) || (midRadian >= 3 * Math.PI / 2 && midRadian <= Math.PI * 2)) ? 1 : -1;let color = pieData[i].itemStyle.color;let turningPosArr = [posX * (1.8) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posY * (1.8) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posZ * (2)]let endPosArr = [posX * (1.9) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posY * (1.9) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posZ * (6)]linesSeries.push({type: 'line3D',lineStyle: {color: color,},data: [[posX, posY, posZ], turningPosArr, endPosArr]},{type: 'scatter3D',label: {show: true,distance:-10,position: 'center',textStyle: {color: 'black',backgroundColor: color,borderWidth: 2,fontSize: 16,padding: 10,borderRadius: 4,},formatter: '{b}'},symbolSize: 0,data: [{ name: series[i].name + '\n' + series[i].pieData.value, value: endPosArr }]});legendData.push(series[i].name);}series = series.concat(linesSeries)  //  在这里能够将指引线与饼图进行连接series.push({name: 'mouseoutSeries',type: 'surface',parametric: true,wireframe: {show: false,},itemStyle: {opacity: 0.1,color: '#E1E8EC',},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)) / Math.PI) * 2.2;},y: function (u, v) {return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2.2;},z: function (u, v) {return Math.cos(v) > 0 ? -7 : -7;},},});// 准备待返回的配置项，把准备好的 legendData、series 传入。let option = {//animation: false,legend: {//left: '50%',//top: 'center',textStyle: {fontSize: 18,},// icon:'diamond',data: legendData,formatter: (params) => {return params;},},tooltip: {formatter: params => {if (params.seriesName !== 'mouseoutSeries') {return `${params.seriesName}<br/><span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>${option.series[params.seriesIndex].pieData.value}`;}}},xAxis3D: {},yAxis3D: {},zAxis3D: {},grid3D: {viewControl: {//3d效果可以放大、旋转等，请自己去查看官方配置projection:'perspective',autoRotateDirection: 'cw',distant: 1000,alpha: 60,beta: 40,rotateSensitivity: 1,zoomSensitivity: 1,panSensitivity: 0,autoRotate: false, //旋转属性},left: 'center',top :"middle",width: '100%',height :"100%",show: false,},series: series,};return option;
}// 传入数据生成 option
option = getPie3D([{name: '性能测试',value: 28,itemStyle: {color: '#99D3F3',},},{name: '安全',value: 56,itemStyle: {color: '#007AFF',},},{name: '功能',value: 57,itemStyle: {color: '#2acf81',},},{name: '易用性',value: 51,itemStyle: {color: '#1F9AA7',},},{name: '代码',value: 11,itemStyle: {color: '#F5B64C',},},],0.7
);

指引线（线的样式+字体颜色）

如果需要这种效果，可以按照以下方式改变formatter的属性

 formatter: function (val) {return ('{name|' + val.data.name + '}:{value|' +val.data.datavalue + '}');},rich: {name: {fontSize: '0.07rem',color: '#fff',fontWeight: 600},value: {fontSize: '0.09rem',color: color,fontWeight: 600},}