三维柱状图

<template>
  <div class="container">
    <div ref="barChart" style="width: 1000px; height: 700px"></div>
  </div>
</template>
<script>
export default {
  mounted() {
    this.createChart();
  },
  methods: {
    createChart() {
      const myChart = this.$echarts.init(this.$refs.barChart);
      const offsetX = 15; //bar宽
      const offsetY = 5; //倾斜角度
      const CubeLeft = this.$echarts.graphic.extendShape({
        shape: {
          x: 0,
          y: 0,
        },
        buildPath: function (ctx, shape) {
          // 会canvas的应该都能看得懂，shape是从custom传入的
          const xAxisPoint = shape.xAxisPoint;
          const c0 = [shape.x, shape.y];
          const c1 = [shape.x - offsetX, shape.y - offsetY + 10]; // 左侧面  左上点
          const c2 = [xAxisPoint[0] - offsetX, xAxisPoint[1] - offsetY + 5]; // 左侧面 左下点
          const c3 = [xAxisPoint[0], xAxisPoint[1] + 0]; // 左侧面 右下点
          ctx
            .moveTo(c0[0], c0[1])
            .lineTo(c1[0], c1[1])
            .lineTo(c2[0], c2[1])
            .lineTo(c3[0], c3[1])
            .closePath();
        },
      });
      // 绘制右侧面
      const CubeRight = this.$echarts.graphic.extendShape({
        shape: {
          x: 0,
          y: 0,
        },
        buildPath: function (ctx, shape) {
          const xAxisPoint = shape.xAxisPoint;
          const c1 = [shape.x, shape.y];
          const c2 = [xAxisPoint[0], xAxisPoint[1] + 0]; //右侧面 左下点
          const c3 = [xAxisPoint[0] + offsetX, xAxisPoint[1] - offsetY + 5]; //右侧面  右下点
          const c4 = [shape.x + offsetX, shape.y - offsetY + 10]; //右侧面 右上点
          ctx
            .moveTo(c1[0], c1[1])
            .lineTo(c2[0], c2[1])
            .lineTo(c3[0], c3[1])
            .lineTo(c4[0], c4[1])
            .closePath();
        },
      });
      // 绘制顶面
      const CubeTop = this.$echarts.graphic.extendShape({
        shape: {
          x: 0,
          y: 0,
        },
        buildPath: function (ctx, shape) {
          const c1 = [shape.x, shape.y + 15]; //顶部菱形下点
          const c2 = [shape.x + offsetX, shape.y - offsetY + 10]; //顶部菱形右点
          const c3 = [shape.x, shape.y - offsetX + 10]; //顶部菱形上点
          const c4 = [shape.x - offsetX, shape.y - offsetY + 10]; //顶部菱形左点
          ctx
            .moveTo(c1[0], c1[1])
            .lineTo(c2[0], c2[1])
            .lineTo(c3[0], c3[1])
            .lineTo(c4[0], c4[1])
            .closePath();
        },
      });
      // 注册三个面图形
      this.$echarts.graphic.registerShape("CubeLeft", CubeLeft);
      this.$echarts.graphic.registerShape("CubeRight", CubeRight);
      this.$echarts.graphic.registerShape("CubeTop", CubeTop);

      const MAX = [800, 800, 800, 800, 800, 800, 800];
      const VALUE = [210.9, 260.8, 204.2, 504.9, 740.5, 600.3, 119.0];
      const option = {
        backgroundColor: "rgba(17, 42, 62, 1)", //"#012366",
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "shadow",
          },
          formatter: function (params, ticket, callback) {
            const item = params[1];
            return item.name + " : " + item.value;
          },
        },
        grid: {
          left: 40,
          right: 40,
          bottom: 100,
          top: 100,
          containLabel: true,
        },
        xAxis: {
          type: "category",
          data: ["1月", "2月", "3月", "4月", "5月", "6月", "7月"],
          axisLine: {
            show: true,
            lineStyle: {
              color: "white",
            },
          },
          offset: 25,
          axisTick: {
            show: false,
            length: 9,
            alignWithLabel: true,
            lineStyle: {
              color: "#7DFFFD",
            },
          },
          axisLabel: {
            show: true,
            fontSize: 16,
          },
        },
        yAxis: {
          min: 0,
          // max: 1200,
          // interval: 200,
          type: "value",
          axisLine: {
            show: false,
            lineStyle: {
              color: "white",
            },
          },
          splitLine: {
            show: true,
            lineStyle: {
              type: "dashed",
              color: "rgba(255,255,255,0.1)",
            },
          },
          axisTick: {
            show: false,
          },
          axisLabel: {
            show: true,
            fontSize: 16,
          },
          boundaryGap: ["20%", "20%"],
        },
        series: [
          {
            type: "custom",
            renderItem: function (params, api) {
              const location = api.coord([api.value(0), api.value(1)]);
              return {
                type: "group",
                children: [
                  {
                    type: "CubeLeft",
                    shape: {
                      api,
                      x: location[0],
                      y: location[1],
                      xAxisPoint: api.coord([api.value(0), 0]),
                    },
                    style: {
                      fill: "#18385A",
                    },
                  },
                  {
                    type: "CubeRight",
                    shape: {
                      api,
                      x: location[0],
                      y: location[1],
                      xAxisPoint: api.coord([api.value(0), 0]),
                    },
                    style: {
                      fill: "#33718E",
                    },
                  },
                  {
                    type: "CubeTop",
                    shape: {
                      api,
                      x: location[0],
                      y: location[1],
                      xAxisPoint: api.coord([api.value(0), 0]),
                    },
                    style: {
                      fill: "#307E8E",
                    },
                  },
                ],
              };
            },
            data: MAX,
          },
          {
            type: "custom",
            renderItem: (params, api) => {
              const location = api.coord([api.value(0), api.value(1)]);
              const isLastTwoBars =
                api.value(0) === VALUE.length - 2 ||
                api.value(0) === VALUE.length - 1;
              var color = isLastTwoBars
                ? "red"
                : new this.$echarts.graphic.LinearGradient(1, 1, 1, 0, [
                    {
                      offset: 0,
                      color: " #0097C8", // 最左边
                    },

                    {
                      offset: 1,
                      color: "#4CF0F9",
                    },
                  ]);
              return {
                type: "group",
                children: [
                  {
                    type: "CubeLeft",
                    shape: {
                      api,
                      xValue: api.value(0),
                      yValue: api.value(1),
                      x: location[0],
                      y: location[1],
                      xAxisPoint: api.coord([api.value(0), 0]),
                    },
                    style: {
                      fill: color,
                    },
                  },
                  {
                    type: "CubeRight",
                    shape: {
                      api,
                      xValue: api.value(0),
                      yValue: api.value(1),
                      x: location[0],
                      y: location[1],
                      xAxisPoint: api.coord([api.value(0), 0]),
                    },
                    style: {
                      fill: color,
                    },
                  },
                  {
                    type: "CubeTop",
                    shape: {
                      api,
                      xValue: api.value(0),
                      yValue: api.value(1),
                      x: location[0],
                      y: location[1],
                      xAxisPoint: api.coord([api.value(0), 0]),
                    },
                    style: {
                      fill: color,
                    },
                  },
                ],
              };
            },

            data: VALUE,
          },
          {
            type: "bar",
            itemStyle: {
              color: "transparent",
            },
            tooltip: {},
            data: MAX,
          },
        ],
      };
      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option);
    },
  },
};
</script>