3d饼图

charts.ts

// 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
export const getParametricEquation = (
  startRatio: number,
  endRatio: number,
  isSelected: boolean,
  isHovered: boolean,
  knum: number,
  h: number,
) => {
  // 计算
  const midRatio = (startRatio + endRatio) / 2;
  const startRadian = startRatio * Math.PI * 2;
  const endRadian = endRatio * Math.PI * 2;
  const midRadian = midRatio * Math.PI * 2;

  // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
  const k = typeof knum !== 'undefined' ? knum : 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）
  const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
  const 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）
  const 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(u: number, v: number) {
      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(u: number, v: number) {
      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(u: number, v: number) {
      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
export const getPie3D = (pieData: any, internalDiameterRatio: any, boxHeight: number = 30) => {
  const series = [];
  let sumValue = 0;
  let startValue = 0;
  let endValue = 0;
  const legendData = [];
  const 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;

    const 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,
      },
      itemStyle: {},
      parametricEquation: {},
    };

    if (typeof pieData[i].itemStyle !== 'undefined') {
      const itemStyle = {
        color: '',
        opacity: '',
      };
      itemStyle.color =
        typeof pieData[i].itemStyle.color !== 'undefined'
          ? (itemStyle.color = pieData[i].itemStyle.color)
          : null;
      itemStyle.opacity =
        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: 'surface',
    parametric: true,
    wireframe: {
      show: false,
    },
    itemStyle: {
      opacity: 0,
    },
    parametricEquation: {
      u: {
        min: 0,
        max: Math.PI * 2,
        step: Math.PI / 20,
      },
      v: {
        min: 0,
        max: Math.PI,
        step: Math.PI / 20,
      },
      x(u: number, v: number) {
        return Math.sin(v) * Math.sin(u) + Math.sin(u);
      },
      y(u: number, v: number) {
        return Math.sin(v) * Math.cos(u) + Math.cos(u);
      },
      z(u: number, v: number) {
        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。
  const option = {
    animation: true,
    xAxis3D: {
      min: -1,
      max: 1,
    },
    yAxis3D: {
      min: -1,
      max: 1,
    },
    zAxis3D: {
      min: -1,
      max: 'dataMax',
    },
    grid3D: {
      top: -12,
      show: false,
      boxHeight,
      viewControl: {
        alpha: 30,
        beta: 40,
        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: {
        enable: true,
        bloom: {
          enable: true,
          bloomIntensity: 0.1,
        },
        SSAO: {
          enable: true,
          quality: 'medium',
          radius: 2,
        },
      },
      temporalSuperSampling: {
        enable: true,
      },
    },
    series,
  };
  return option;
};

import * as echarts from 'echarts';
import 'echarts-gl';
import { getPie3D } from '../utils/charts';

const echartData = [
  {
    count: 12
    id: 1
    name: "营运车证件检查1"
    rate: "20%"
  },
  {
    count: 22
    id: 2
    name: "营运车证件检查2"
    rate: "40%"
  },
  {
    count: 32
    id: 3
    name: "营运车证件检查3"
    rate: "40%"
  }
]
const colorArr = [
  'rgb(38, 79, 182)',
  'rgb(60, 231, 207)',
  '#32A7ED',
  '#EDB259',
  '#4CE1EE',
  '#9083FD',
];
const newEchartData = echartData.map((item: any, index: number) => {
  return {
    name: item.name,
    value: item.count,
    itemStyle: {
      color: colorArr[index],
      opacity: 0.9,
    },
  };
});

const options = getPie3D(newEchartData, 0.59, 20);
// myEcharts是echarts实例
myEcharts.setOption(options);