vue3之echarts3D环柱图

vue3之echarts3D环柱图

效果：

核心代码：

<template>
    <div class="container">
        <div ref="chartRef" class="charts"></div>
    </div>
</template>

<script lang="ts" setup>
import * as echarts from 'echarts';
import 'echarts-gl';
import { reactive, onMounted, ref } from 'vue';

const chartRef = ref(null);
let myChart: any = null;
let option: any = null;

let dataList = reactive({
    charts: [
        {
            name: '设备故障',
            count: 239,
            color: '#218DFF',
        },
        {
            name: '智能识别',
            count: 239,
            color: '#2FFF88',
        },
        {
            name: '保修工单',
            count: 239,
            color: '#FFCE2F',
        },
        {
            name: '设备报警',
            count: 239,
            color: '#17EDFF ',
        },
    ],
});

const getParametricEquation = (
    startRatio: any,
    endRatio: any,
    isSelected: any,
    isHovered: boolean,
    k: any,
    h: any,
) => {
    // 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;

    // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
    k = 1 / 10;

    // 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;
    let index = 0;
    if (h === 0) {
        index = 6;
        h = 1;
    } else if (h === 1) {
        index = 4;
    } else if (h === 2) {
        index = 1;
    }

    // 计算高亮效果的放大比例（未高亮，则比例为 1）
    let hoverRate = 1.7;

    // 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: any, v: any) {
            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: any, v: any) {
            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: any, v: any) {
            if (u < -Math.PI * 0.5) {
                return Math.sin(u);
            }
            if (u > Math.PI * 2.5) {
                return 0;
            }
            return Math.sin(v) > 0 ? h * index : -4;
        },
    };
};
// 生成模拟 3D 饼图的配置项
const getPie3D = (pieData: any, internalDiameterRatio: any) => {
    let series = [];
    let sumValue = 0;
    let startValue = 0;
    let endValue = 0;
    let legendData: any = [];
    let k = typeof internalDiameterRatio !== 'undefined'
        ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio)
        : 1 / 2;

    // 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: any = {
            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,
            },
        };

        if (typeof pieData[i].itemStyle != 'undefined') {
            let itemStyle: any = {};

            (typeof pieData[i].itemStyle.color as any) != '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。
    let linesSeries: any = [];
    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,
            i,
        );

        startValue = endValue;
    }
    series = series.concat(linesSeries);

    // 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 * 2,
                step: Math.PI / 20,
            },
            x(u: any, v: any) {
                return Math.sin(v) * Math.sin(u) + Math.sin(u);
            },
            y(u: any, v: any) {
                return Math.sin(v) * Math.cos(u) + Math.cos(u);
            },
            z(u: any, v: any) {
                return Math.cos(v) > 0 ? 0.3 : -0.3;
            },
        },
    });

    // 准备待返回的配置项，把准备好的 legendData、series 传入。
    let option = {
        // animation: false,
        legend: {
            data: legendData,
        },
        xAxis3D: {
            min: -1,
            max: 1,
        },
        yAxis3D: {
            min: -1,
            max: 1,
        },
        zAxis3D: {
            min: -1,
            max: 1,
        },
        grid3D: {
            show: false,
            boxHeight: 9,
            left: 8,
            top: -30,
            viewControl: {
                // 3d效果可以放大、旋转等，请自己去查看官方配置
                alpha: 22,
                rotateSensitivity: 0,
                zoomSensitivity: 0,
                panSensitivity: 0,
                autoRotate: false,
            },
        },
        series,
    };
    return option;
};

// 3D
const initCharts = () => {
    if (chartRef.value) {
        myChart = echarts.init(chartRef.value);
    }
    const options:Array<any> = [];
    dataList.charts.forEach((item) => {
        options.push({
            value: item.count + 0,
            itemStyle: {
                color: item.color,
            },
        });
    });

    // 传入数据生成 option
    option = getPie3D(
        options,
        0.89,
    );
    myChart.setOption(option);
    return true;
};
onMounted(() => {
    initCharts();
});

</script>

<style lang="scss" scoped>
.container {
    width: 791px;
    height: 168px;
    position: relative;

    .charts {
        position: absolute;
        width: 50%;
        height: 100%;
        left: 195px;
    }
}
</style>