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  • echarts 3d饼图

    <template>
      <div
        ref="myChart"
        :class="className"
        :style="{ height: height,  width }"
      />
    </template>
    
    <script>
    import * as echarts from "echarts";
    import "echarts-gl";
    
    export default {
      props: {
        className: {
          type: String,
          default: "container",
        },
         {
          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,
            },
          ],
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  • 原文地址:https://www.cnblogs.com/Byme/p/14889986.html
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