Bootstrap

echarts实现3d饼图

在这里插入图片描述
html

<script src="https://cdn.jsdelivr.net/npm/echarts/dist/echarts.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/echarts-gl/dist/echarts-gl.min.js"></script>
<style>
	#echarts {
	width: 500px;
	height: 500px
	}
</style>
<div id="echarts"></div>

js

 let option3;
    var newArr = [{
        name: '线下常规培训',
        value: 55,
        itemStyle: {
            color: '#438ddf'
        }
    }, {
        name: '线上指导培训',
        value: 30,
        itemStyle: {
            color: '#6be397',
        }
    }, {
        name: '专业院校系统培训',
        value: 20,
        itemStyle: {
            color: '#e6e6e6'
        }
    }, {
        name: '托育员现场实践培训',
        value: 16,
        itemStyle: {
            color: '#f6ca6c'
        }
    },
    {
        name: '托育监管人员培训',
        value: 30,
        itemStyle: {
            color: '#8BE3FF'
        }
    }
    ];

    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 * .1;
                }
                return Math.sin(v) > 0 ? 1 * h * .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);
        }
        // 准备待返回的配置项,把准备好的 legendData、series 传入。
        let option = {
            // animation: true,
            legend: [{
                orient: 'vertical',
                itemHeight: 5,
                // data: newArr.slice(2, 4),
                bottom: '17%',
                left: '10%',
                align: 'left',
                textStyle: {
                    color: "#2CD9FE",
                    fontSize: 12,
                },
                itemGap: 20
            },
            ],
            tooltip: {
                backgroundColor: 'RGBA(0, 49, 85, 1)',
                borderColor: 'rgba(0, 151, 251, 1)',
                borderWidth: 1,
                borderRadius: 0,
                textStyle: {
                    color: '#BCE9FC',
                    fontSize: 12,
                    align: 'left',
                },
                formatter: params => {
                    if (params.seriesName !== 'mouseoutSeries') {
                        return `${params.seriesName}<br/><span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>${option.series[params.seriesIndex].pieData.value}`;
                    }
                }
            },
            xAxis3D: {
                min: -1,
                max: 1
            },
            yAxis3D: {
                min: -1,
                max: 1
            },
            zAxis3D: {
                min: -1,
                max: 1
            },
            grid3D: {
                show: false,
                boxHeight: 15,
                top: '5%',
                left: '18%',
                viewControl: {//3d效果可以放大、旋转等,请自己去查看官方配置
                    alpha: 40,
                    // beta: 40,
                    rotateSensitivity: 0,
                    zoomSensitivity: 0,
                    panSensitivity: 0,
                    autoRotate: false,
                    projection: 'perspective', // 先设置为这个perspective
                    distance: 200
                },
                //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;
    }

    function handleRender3DPie() {
        const echart3 = echarts.init(document.getElementById('echarts'));
        option3 = getPie3D(newArr, 0.59);
        echart3.clear()
        echart3.setOption(option3)
    }
    //调用
    handleRender3DPie()
;