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+/**
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+ * 绘制3d图
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+ * @param pieData 总数据
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+ * @param internalDiameterRatio:透明的空心占比
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+ * @param distance 视角到主体的距离
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+ * @param alpha 旋转角度
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+ * @param pieHeight 立体的高度
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+ * @param opacity 饼或者环的透明度
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+ */
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+ const getPie3D = (pieData, internalDiameterRatio, distance, alpha, pieHeight, opacity = 1) => {
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+ const 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 legendBfb = []
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+ const k = 1 - internalDiameterRatio
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+ pieData.sort((a, b) => {
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+ return b.value - a.value
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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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+ const 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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+ 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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+ center: ['10%', '50%']
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+ }
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+ if (typeof pieData[i].itemStyle !== 'undefined') {
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+ const itemStyle = {}
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+ itemStyle.color =
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+ typeof pieData[i].itemStyle.color !== 'undefined'
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+ ? pieData[i].itemStyle.color
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+ : opacity
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+ itemStyle.opacity =
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+ typeof pieData[i].itemStyle.opacity !== 'undefined'
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+ ? pieData[i].itemStyle.opacity
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+ : opacity
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+ seriesItem.itemStyle = itemStyle
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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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+ legendData = []
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+ legendBfb = []
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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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+ series[i].pieData.startRatio = startValue / sumValue
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+ series[i].pieData.endRatio = endValue / sumValue
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+ series[i].parametricEquation = 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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+ startValue = endValue
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+ const bfb = fomatFloat(series[i].pieData.value / sumValue, 4)
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+ legendData.push({
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+ name: series[i].name,
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+ value: bfb
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+ })
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+ legendBfb.push({
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+ name: series[i].name,
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+ value: bfb
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+ })
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+ }
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+ const boxHeight = getHeight3D(series, pieHeight) // 通过pieHeight设定3d饼/环的高度,单位是px
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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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+ const option = {
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+ legend: {
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+ show: false,
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+ data: legendData,
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+ orient: 'vertical',
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+ left: 10,
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+ top: 10,
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+ itemGap: 10,
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+ textStyle: {
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+ color: '#A1E2FF'
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+ },
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+ icon: 'circle',
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+ formatter: function (param) {
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+ const item = legendBfb.filter(item => item.name === param)[0]
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+ const bfs = fomatFloat(item.value * 100, 2) + '%'
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+ return `${item.name} ${bfs}`
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+ }
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+ },
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+ labelLine: {
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+ show: true,
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+ lineStyle: {
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+ color: '#fff'
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+ }
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+ },
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+ label: {
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+ show: true,
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+ position: 'outside',
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+ formatter: '{b} \n{c} {d}%'
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+ },
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+ tooltip: {
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+ backgroundColor: '#033b77',
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+ borderColor: '#21f2c4',
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+ textStyle: {
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+ color: '#fff',
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+ fontSize: 13
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+ },
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+ formatter: params => {
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+ if (
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+ params.seriesName !== 'mouseoutSeries' &&
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+ params.seriesName !== 'pie2d'
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+ ) {
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+ const bfb = (
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+ (option.series[params.seriesIndex].pieData.endRatio -
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+ option.series[params.seriesIndex].pieData.startRatio) *
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+ 100
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+ ).toFixed(2)
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+ return (
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+ `${params.seriesName}<br/>` +
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+ `<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
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+ `${bfb}%`
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+ )
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+ }
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+ }
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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: boxHeight, // 圆环的高度
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+ viewControl: {
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+ // 3d效果可以放大、旋转等
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+ alpha:30, // 角度
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+ distance:350, // 调整视角到主体的距离,类似调整zoom
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+ rotateSensitivity: 0, // 设置为0无法旋转
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+ zoomSensitivity: 0, // 设置为0无法缩放
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+ panSensitivity: 0, // 设置为0无法平移
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+ autoRotate: false // 自动旋转
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+ },
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+ },
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+ series: series
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+ }
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+ return option
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+ }
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+
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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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+ */
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+ const getParametricEquation = (startRatio, endRatio, isSelected, isHovered, k, h) => {
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+ // 计算
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+ const midRatio = (startRatio + endRatio) / 2
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+ const startRadian = startRatio * Math.PI * 2
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+ const endRadian = endRatio * Math.PI * 2
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+ const midRadian = midRatio * Math.PI * 2
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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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+ // 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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+ // 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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+ const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0
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+ const offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0
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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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+ const hoverRate = isHovered ? 1.05 : 1
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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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+ 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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+ 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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+ 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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+ 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) * h * 0.1
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+ }
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+ return Math.sin(v) > 0 ? 1 * h * 0.1 : -1
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+ }
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+ }
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+ }
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+
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+ /**
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+ * 获取3d丙图的最高扇区的高度
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+ */
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+ const getHeight3D = (series, height) => {
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+ series.sort((a, b) => {
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+ return b.pieData.value - a.pieData.value
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+ })
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+ return (height * 25) / series[0].pieData.value
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+ }
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+
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+ /**
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+ * 格式化浮点数
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+ */
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+ const fomatFloat = (num, n) => {
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+ let f = parseFloat(num)
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+ if (isNaN(f)) {
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+ return false
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+ }
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+ f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n) // n 幂
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+ let s = f.toString()
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+ let rs = s.indexOf('.')
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+ // 判定如果是整数,增加小数点再补0
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+ if (rs < 0) {
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+ rs = s.length
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+ s += '.'
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+ }
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+ while (s.length <= rs + n) {
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+ s += '0'
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+ }
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+ return s
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+ }
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+
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+ export { getPie3D, getParametricEquation }
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