// 传入数据生成 option const dataList = [ { name: '公务用车运行维护费', val: 1230,//存储数据的地方 itemStyle: { color: 'rgba(0, 81, 180, 0.5)', }, }, { name: '办公费', val: 800,//存储数据的地方 itemStyle: { color: 'rgba(255, 196, 0, 0.5)', }, }, { name: '差旅费', val: 500,//存储数据的地方 itemStyle: { color: 'rgba(95, 144, 110, 0.5)', }, }, ]; const heightProportion = 0.2 // 柱状扇形的高度比例 // 生成扇形的曲面参数方程，用于 series-surface.parametricEquation function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, height) { // 计算 let midRatio = (startRatio + endRatio) / 3; 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 ? 1.1 : 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); } return Math.sin(v) > 0 ? heightProportion * height : -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 linesSeries = []; // line3D模拟label指示线 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; // console.log(series[i]); 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; // 计算label指示线的起始和终点位置 let midRadian = (series[i].pieData.endRatio + series[i].pieData.startRatio) * Math.PI; let posX = Math.cos(midRadian) * (1 + Math.cos(Math.PI / 2)); let posY = Math.sin(midRadian) * (1 + Math.cos(Math.PI / 2)); let posZ = Math.log(Math.abs(series[i].pieData.value + 1)) * 0.1; let flag = ((midRadian >= 0 && midRadian <= Math.PI / 2) || (midRadian >= 3 * Math.PI / 2 && midRadian <= Math.PI * 2)) ? 1 : -1; let color = pieData[i].itemStyle.color; let turningPosArr = [posX * (1.8) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posY * (1.8) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posZ * (2)] let endPosArr = [posX * (1.9) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posY * (1.9) + (i * 0.1 * flag) + (flag < 0 ? -0.5 : 0), posZ * (6)] linesSeries.push({ type: 'line3D', lineStyle: { color: color, }, data: [[posX, posY, posZ], turningPosArr, endPosArr] }, { type: 'scatter3D', label: { show: true, distance: 0, position: 'center', textStyle: { color: '#ffffff', backgroundColor: color, borderWidth: 2, fontSize: 14, padding: 10, borderRadius: 4, }, formatter: '{b}' }, symbolSize: 0, data: [{name: series[i].name + '\n' + series[i].pieData.val, value: endPosArr}] }); legendData.push(series[i].name); } series = series.concat(linesSeries) // 最底下圆盘 series.push({ name: 'mouseoutSeries', type: 'surface', parametric: true, wireframe: { show: false, }, itemStyle: { opacity: 1, color: 'rgba(25, 93, 176, 1)', }, parametricEquation: { u: { min: 0, max: Math.PI * 2, step: Math.PI / 20, }, v: { min: 0, max: Math.PI, step: Math.PI / 20, }, x: function (u, v) { return ((Math.sin(v) * Math.sin(u) + Math.sin(u)) / Math.PI) * 2; }, y: function (u, v) { return ((Math.sin(v) * Math.cos(u) + Math.cos(u)) / Math.PI) * 2; }, z: function (u, v) { return Math.cos(v) > 0 ? -0 : -1.5; }, }, }); return series; } let total = 0 dataList.forEach(item => { total += item.val }) const series = getPie3D(dataList.map(item => { item.value = Number( (item.val / total * 100).toFixed(2) ) return item }), 0.8, 240, 28, 26, 1); // 准备待返回的配置项，把准备好的 legendData、series 传入。 option = { legend: { tooltip: { show: true, }, data: dataList.map(item => item.name), top: '5%', left: '5%', icon: 'circle', textStyle: { color: '#fff', fontSize: 14, }, }, animation: true, title: [ { x: 'center', top: '40%', text: total, textStyle: { color: '#fff', fontSize: 42, fontWeight: 'bold' }, }, { x: 'center', top: '48%', text: '还款总额', textStyle: { color: '#fff', fontSize: 22, fontWeight: 400 }, }, ], backgroundColor: '#333', labelLine: { show: true, lineStyle: { color: '#7BC0CB', }, }, label: { show: false, }, xAxis3D: { min: -1.5, max: 1.5, }, yAxis3D: { min: -1.5, max: 1.5, }, zAxis3D: { min: -1, max: 1, }, grid3D: { show: false, boxHeight: 4, bottom: '50%', viewControl: { distance: 180, alpha: 25, beta: 60, autoRotate: true, // 自动旋转 }, }, series: series, };

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