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+<template>
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+ <div id="sankey_echart" ref="echart"></div>
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+</template>
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+
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+<script>
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+let option = {
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+ legend: {
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+ tooltip: {
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+ show: true,
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+ },
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+ orient: "vertical",
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+
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+ itemWidth: 12, // 设置宽度
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+ itemHeight: 12, // 设置高度
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+ data: ["征收", "收购", "回收"],
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+ bottom: "40%",
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+ right: "40%",
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+
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+ itemGap: 10,
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+ textStyle: {
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+ color: "#fff",
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+ fontSize: 14,
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+ },
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+ formatter: function (name) {
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+ console.log(name);
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+
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+ return name;
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+ },
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+ },
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+ animation: true,
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+
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+ backgroundColor: "rgba(0,0,0,0)",
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+ labelLine: {
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+ show: false,
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+ lineStyle: {
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+ color: "#7BC0CB",
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+ },
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+ },
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+ label: {
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+ show: false,
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+ position: "outside",
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+ formatter: "{d}%",
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+ color: "inherit",
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+ },
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+ xAxis3D: {
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+ min: -1,
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+ max: 1,
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+ },
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+ yAxis3D: {
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+ min: -1,
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+ max: 1,
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+ },
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+ zAxis3D: {
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+ min: -1,
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+ max: 1,
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+ },
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+ grid3D: {
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+ show: false,
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+ boxHeight: 1,
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+ top: "-5%",
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+ left: "-25%",
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+ // bottom: '-80%',
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+ // environment: '#021041',
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+ viewControl: {
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+ distance: 180,
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+ alpha: 25,
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+ beta: 20,
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+ // autoRotate: true, // 自动旋转
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+ },
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+ },
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+
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+ series: [],
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+};
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+export default {
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+ name: "sankey_echart",
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+ components: {},
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+ data() {
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+ return {
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+ myChart: null,
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+ };
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+ },
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+ methods: {
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+ setOptions(data) {
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+ if (!this.myChart) {
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+ // var dom = document.getElementById("sankey_echart");
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+ this.myChart = echarts.init(this.$refs.echart);
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+ }
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+
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+ this.initEchartXzqh(data);
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+ },
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+ initEchartXzqh(optionsData) {
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+ const series = this.getPie3D(optionsData, 0.6);
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+ option.series = series;
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+
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+ // series.push({
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+ // name: "pie2d",
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+ // type: "pie",
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+
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+ // label: {
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+ // normal: {
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+ // show: false, //设为false
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+ // position: "center", //center表示文本显示位置为内部
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+ // },
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+ // opacity: 1,
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+ // fontSize: 13,
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+ // lineHeight: 20,
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+ // textStyle: {
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+ // fontSize: 22,
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+ // },
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+ // },
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+ // labelLine: {
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+ // length: 20,
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+ // length2: 40,
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+ // },
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+ // startAngle: -30, //起始角度,支持范围[0, 360]。
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+ // clockwise: false, //饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
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+ // radius: ["30%", "55%"],
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+ // center: ["52%", "38%"],
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+ // // 没啥用
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+ // data: [
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+ // {
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+ // name: "征收",
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+ // value: 20,
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+ // itemStyle: {
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+ // // opacity: 0.8,
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+ // color: "#3b8584",
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+ // },
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+ // },
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+
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+ // {
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+ // name: "收购",
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+ // value: 50,
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+ // itemStyle: {
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+ // // opacity: 0.8,
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+ // color: "#64d9e0",
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+ // },
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+ // },
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+ // {
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+ // name: "回收",
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+ // value: 30,
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+ // itemStyle: {
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+ // // opacity: 0.8,
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+ // color: "#dac254",
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+ // },
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+ // },
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+ // ],
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+ // itemStyle: {
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+ // opacity: 0,
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+ // },
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+ // });
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+ // // 准备待返回的配置项,把准备好的 legendData、series 传入。
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+
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+ let total = optionsData.reduce(function (prev, cur, index, arr) {
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+ return prev + cur.value;
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+ }, 0); //数据总和
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+
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+ this.myChart.setOption(option);
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+ },
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+ // 生成扇形的曲面参数方程,用于 series-surface.parametricEquation
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+ getParametricEquation(
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+ startRatio,
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+ endRatio,
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+ isSelected,
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+ isHovered,
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+ k,
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+ height
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+ ) {
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+ // 计算
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+ let midRatio = (startRatio + endRatio) / 2;
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+
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+ let startRadian = startRatio * Math.PI * 2;
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+ let endRadian = endRatio * Math.PI * 2;
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+ let midRadian = midRatio * Math.PI * 2;
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+
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+ // 如果只有一个扇形,则不实现选中效果。
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+ if (startRatio === 0 && endRatio === 1) {
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+ isSelected = false;
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+ }
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+
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+ // 通过扇形内径/外径的值,换算出辅助参数 k(默认值 1/3)
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+ k = typeof k !== "undefined" ? k : 1 / 3;
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+
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+ // 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)
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+ let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
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+ let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
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+
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+ // 计算高亮效果的放大比例(未高亮,则比例为 1)
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+ let hoverRate = isHovered ? 1.05 : 1;
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+
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+ // 返回曲面参数方程
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+ return {
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+ u: {
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+ min: -Math.PI,
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+ max: Math.PI * 3,
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+ step: Math.PI / 32,
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+ },
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+
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+ v: {
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+ min: 0,
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+ max: Math.PI * 2,
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+ step: Math.PI / 20,
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+ },
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+
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+ x: function (u, v) {
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+ if (u < startRadian) {
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+ return (
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+ offsetX +
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+ Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
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+ );
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+ }
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+ if (u > endRadian) {
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+ return (
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+ offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
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+ );
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+ }
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+ return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
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+ },
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+
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+ y: function (u, v) {
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+ if (u < startRadian) {
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+ return (
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+ offsetY +
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+ Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
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+ );
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+ }
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+ if (u > endRadian) {
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+ return (
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+ offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
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+ );
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+ }
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+ return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
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+ },
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+
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+ z: function (u, v) {
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+ if (u < -Math.PI * 0.5) {
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+ return Math.sin(u);
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+ }
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+ if (u > Math.PI * 2.5) {
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+ return Math.sin(u);
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+ }
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+ return Math.sin(v) > 0 ? 1 * height : -1;
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+ },
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+ };
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+ },
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+
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+ // 生成模拟 3D 饼图的配置项
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+ getPie3D(pieData, internalDiameterRatio) {
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+ let series = [];
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+ let sumValue = 0;
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+ let startValue = 0;
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+ let endValue = 0;
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+ let legendData = [];
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+ let k =
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+ typeof internalDiameterRatio !== "undefined"
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+ ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio)
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+ : 1 / 3;
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+
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+ // 为每一个饼图数据,生成一个 series-surface 配置
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+ for (let i = 0; i < pieData.length; i++) {
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+ sumValue += pieData[i].value;
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+
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+ let seriesItem = {
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+ name:
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+ typeof pieData[i].name === "undefined"
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+ ? `series${i}`
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+ : pieData[i].name,
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+ type: "surface",
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+
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+ parametric: true,
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+ wireframe: {
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+ show: false,
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+ },
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+ pieData: pieData[i],
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+ pieStatus: {
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+ selected: false,
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+ hovered: false,
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+ k: k,
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+ },
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+ };
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+
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+ if (typeof pieData[i].itemStyle != "undefined") {
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+ let itemStyle = {};
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+
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+ typeof pieData[i].itemStyle.color != "undefined"
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+ ? (itemStyle.color = pieData[i].itemStyle.color)
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+ : null;
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+ typeof pieData[i].itemStyle.opacity != "undefined"
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+ ? (itemStyle.opacity = pieData[i].itemStyle.opacity)
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+ : null;
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+
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+ seriesItem.itemStyle = itemStyle;
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+ }
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+
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+ series.push(seriesItem);
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+ }
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+
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+ // 使用上一次遍历时,计算出的数据和 sumValue,调用 getParametricEquation 函数,
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+ // 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。
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+ for (let i = 0; i < series.length; i++) {
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+ endValue = startValue + series[i].pieData.value;
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+
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+ series[i].pieData.startRatio = startValue / sumValue;
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+ series[i].pieData.endRatio = endValue / sumValue;
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+ series[i].parametricEquation = this.getParametricEquation(
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+ series[i].pieData.startRatio,
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+ series[i].pieData.endRatio,
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+ false,
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+ false,
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+ k,
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+ series[i].pieData.value
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+ );
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+
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+ startValue = endValue;
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+
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+ legendData.push(series[i].name);
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+ }
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+
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+ return series;
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+ },
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+ },
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+ mounted() {
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+ this.setOptions();
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+ },
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+};
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+</script>
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+<style lang="scss" scoped>
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+.sankey_echart {
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+ width: 100%;
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+ height: 100%;
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+}
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+</style>
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