function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k) { // 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); } return Math.sin(v) > 0 ? 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) : 5; // 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, true, false, 0.25); startValue = endValue; legendData.push(series[i].name); } // 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, }, clockwise: false, itemStyle: { opacity: 0, color: 'rgba(18,236,252,.2)', }, parametricEquation: { u: { min: 0, max: Math.PI * 2, step: Math.PI / 20, }, v: { min: 0, max: Math.PI, step: Math.PI / 1.4, }, x: function (u, v) { return Math.sin(v) * Math.sin(u) + Math.sin(u); }, y: function (u, v) { return Math.sin(v) * Math.cos(u) + Math.cos(u); }, z: function (u, v) { return Math.cos(v) > 0 ? 0.1 : -0.1; }, }, }); // 准备待返回的配置项,把准备好的 legendData、series 传入。 option = { //animation: false, legend: [ { data: [ { name: '充换电', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '20%', left: '45%', textStyle: { color: '#fff', fontSize: 20, }, }, { data: [ { name: '用户侧储能', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '20%', left: '70%', textStyle: { color: '#fff', fontSize: 20, }, }, { data: [ { name: '数据中心', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '40%', left: '45%', textStyle: { color: '#fff', fontSize: 20, }, }, { data: [ { name: '楼宇空调', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '40%', left: '70%', textStyle: { color: '#fff', fontSize: 20, }, }, { data: [ { name: '分布式三联供', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '60%', left: '45%', textStyle: { color: '#fff', fontSize: 20, }, }, { data: [ { name: '非连续生产', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '60%', left: '70%', textStyle: { color: '#fff', fontSize: 20, }, }, { data: [ { name: '其他', icon: 'rect', }, ], itemWidth: 20, itemHeight: 20, top: '80%', left: '45%', textStyle: { color: '#fff', fontSize: 20, }, }, ], backgroundColor: "#111", xAxis3D: { min: -1, max: 1, }, yAxis3D: { min: -1, max: 1, }, zAxis3D: { min: -1, max: 1, }, grid3D: { show: false, boxHeight: 10, left: "-10%", bottom: '50%', viewControl: { //3d效果可以放大、旋转等,请自己去查看官方配置 alpha: 45, // beta: 40, rotateSensitivity: 0, zoomSensitivity: 0, panSensitivity: 0, autoRotate: false, // autoRotateSpeed: 5, // autoRotateAfterStill: 10 }, }, series: series, }; return option; } // 传入数据生成 option option = getPie3D( [ { name: '充换电', value: 30.16, itemStyle: { color: '#25a6ff', }, }, { value: 0.4, itemStyle: { color: '#00000000', }, }, { name: '用户侧储能', value: 6.05, itemStyle: { color: '#70d69f', }, }, { value: 0.4, itemStyle: { color: '#00000000', }, }, { name: '数据中心', value: 2.43, itemStyle: { color: '#ffb619', }, }, { value: 0.4, itemStyle: { color: '#00000000', }, }, { name: '楼宇空调', value: 14.86, itemStyle: { color: '#ffe65c', }, }, { value: 0.4, itemStyle: { color: '#00000000', }, }, { name: '分布式三联供', value: 8.17, itemStyle: { color: '#ff7552', }, }, { value: 0.4, itemStyle: { color: '#00000000', }, }, { name: '非连续生产', value: 19.48, itemStyle: { color: '#ffb619', }, }, { value: 0.4, itemStyle: { color: '#00000000', }, }, { name: '其他', value: 1.21, itemStyle: { color: '#30f3ff', }, }, ], 0.56 );