echart对y轴定义平分为几份

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image.png

const offsetX = 20
const offsetY = 10
// 绘制左侧面
const CubeLeft = 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
    // console.log(shape);
    const c0 = [shape.x, shape.y]
    const c1 = [shape.x - offsetX, shape.y - offsetY]
    const c2 = [xAxisPoint[0] - offsetX, xAxisPoint[1] - offsetY]
    const c3 = [xAxisPoint[0], xAxisPoint[1]]
    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 = 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]]
    const c3 = [xAxisPoint[0] + offsetX, xAxisPoint[1] - offsetY]
    const c4 = [shape.x + offsetX, shape.y - offsetY]
    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 = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0
  },
  buildPath: function (ctx, shape) {
    const c1 = [shape.x, shape.y]
    const c2 = [shape.x + offsetX, shape.y - offsetY] // 右点
    const c3 = [shape.x, shape.y - offsetX]
    const c4 = [shape.x - offsetX, shape.y - offsetY]
    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
echarts.graphic.registerShape('CubeLeft', CubeLeft)
echarts.graphic.registerShape('CubeRight', CubeRight)
echarts.graphic.registerShape('CubeTop', CubeTop)

let yData = [120, 220, 160, 280]
let yData2 = [10, 50, 20, 30]
option = {
  //你的代码
  backgroundColor: '#031a40',
  legend: {
    show: true,
    top: "15%",
    itemGap: 30,
    itemWidth: 20,
    itemHeight: 10,
    data: ["活动数", "报名数", "签到数"],
    textStyle: {
      fontSize: 18,
      color: "#ffffff",
    },
  },
  color: ['#E7D36B', '#26D6D7', '#43EFFF'],
  tooltip: {
    trigger: 'axis',
    textStyle: {
      fontSize: 20 // 字体大小
    },
    axisPointer: {
      type: 'shadow'
    },
  },
  grid: {
    top: "20%",
    left: "3%",
    right: "3%",
    bottom: "5%",
    containLabel: true,
  },
  xAxis: {
    type: 'category',
    data: ['11月', '12月', '1月', '2月', '3月'],
    axisLine: {
      show: true,
      lineStyle: {
        width: 1,
        color: 'rgba(239, 247, 253, .1)'
      }
    },
    axisTick: {
      show: false
    },
    axisLabel: {
      fontSize: 16,
      color: "#E7FCFF",
      margin: 20
    },
  },
  yAxis: [{
    type: 'value',
    name: '次',
    nameGap: 30,
    nameTextStyle: {
      color: "#ffffff",
      fontWeight: 400,
      fontSize: 16,
    },
    axisLine: {
      show: true,
      lineStyle: {
        width: 1,
        color: 'rgba(239, 247, 253, .1)'
      }
    },
    splitLine: {
      show: true,
      lineStyle: {
        color: 'rgba(239, 247, 253, .1)',
      }
    },
    axisTick: {
      show: false
    },
    axisLabel: {
      fontSize: 16,
      color: "#E7FCFF"
    },
    min: 0,
    max: Math.ceil(Math.max.apply(null, yData2) / 5) * 5,
    interval: Math.ceil(Math.max.apply(null, yData2) / 5)
  },
  {
    type: 'value',
    name: '人次',
    nameGap: 30,
    nameTextStyle: {
      color: "#ffffff",
      fontWeight: 400,
      fontSize: 16,
    },
    axisLine: {
      show: true,
      lineStyle: {
        width: 1,
        color: 'rgba(239, 247, 253, .1)'
      }
    },
    splitLine: {
      show: !true,
      lineStyle: {
        color: 'rgba(239, 247, 253, .1)',
      }
    },
    axisTick: {
      show: false
    },
    axisLabel: {
      fontSize: 16,
      color: "#E7FCFF"
    },
    min: 0,
    max: Math.ceil(Math.max.apply(null, yData) / 5) * 5,
    interval: Math.ceil(Math.max.apply(null, yData) / 5)
  }
  ],
  series: [
    {
      name: "签到数",
      type: 'custom',
      yAxisIndex: 1, //使用的 y 轴的 index，在单个图表实例中存在多个 y轴的时候有用
      renderItem: (params, api) => {
        const location = api.coord([api.value(0), api.value(1)])
        return {
          type: 'group',
          x: 40,
          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: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#eedf40'
                  },
                  {
                    offset: 1,
                    color: 'rgba(0, 0, 0, 0.1)'
                  }
                ]),
                stroke: 'rgba(3, 25, 63, .1)', //边框颜色
              }
            },
            {
              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: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#eedf40'
                  },
                  {
                    offset: 1,
                    color: 'rgba(0, 0, 0, 0.1)'
                  }
                ]),
                stroke: 'rgba(3, 25, 63, .1)', //边框颜色
              }
            },
            {
              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: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#eedf40'
                  },
                  {
                    offset: 1,
                    color: '#eedf40'
                  }
                ]),
                stroke: 'rgba(3, 25, 63, .1)', //边框颜色
              }
            }
          ]
        }
      },
      data: yData
    },
    {
      name: "报名数",
      type: 'custom',
      yAxisIndex: 1, //使用的 y 轴的 index，在单个图表实例中存在多个 y轴的时候有用
      renderItem: (params, api) => {
        const location = api.coord([api.value(0), api.value(1)])
        return {
          type: 'group',
          x: -20,
          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: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#0cd7f2'
                  },
                  {
                    offset: 1,
                    color: 'rgba(0, 0, 0, 0.1)'
                  }
                ]),
                stroke: 'rgba(3, 25, 63, .1)', //边框颜色
              }
            },
            {
              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: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#0cd7f2'
                  },
                  {
                    offset: 1,
                    color: 'rgba(0, 0, 0, 0.1)'
                  }
                ]),
                stroke: 'rgba(3, 25, 63, .1)', //边框颜色
              }
            },
            {
              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: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#0cd7f2'
                  },
                  {
                    offset: 1,
                    color: '#0cd7f2'
                  }
                ]),
                stroke: 'rgba(3, 25, 63, .1)', //边框颜色
              }
            }
          ]
        }
      },

      data: yData
    },
    {
      name: '活动数',
      type: "line",
      showSymbol: true,
      yAxisIndex: 0, //使用的 y 轴的 index，在单个图表实例中存在多个 y轴的时候有用
      // smooth: true,
      symbol: 'none',
      itemStyle: {
        color: "#01EEFD"
      },
      lineStyle: {
        width: 3,
      },
      areaStyle: {
        normal: {
          color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
            offset: 0,
            color: 'rgba(67, 239, 255, .3)',
          },
          {
            offset: 1,
            color: 'rgba(1, 17, 49, .3)',
          }
          ]),
        },
      },
      data: yData2
    }]
};
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