chart.js 8.1 KB

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  1. /**
  2. * 绘制3d图
  3. * @param pieData 总数据
  4. * @param internalDiameterRatio:透明的空心占比
  5. * @param distance 视角到主体的距离
  6. * @param alpha 旋转角度
  7. * @param pieHeight 立体的高度
  8. * @param opacity 饼或者环的透明度
  9. */
  10. const getPie3D = (pieData, internalDiameterRatio, distance, alpha, pieHeight, opacity = 1) => {
  11. const series = []
  12. let sumValue = 0
  13. let startValue = 0
  14. let endValue = 0
  15. let legendData = []
  16. let legendBfb = []
  17. const k = 1 - internalDiameterRatio
  18. pieData.sort((a, b) => {
  19. return b.value - a.value
  20. })
  21. // 为每一个饼图数据,生成一个 series-surface 配置
  22. for (let i = 0; i < pieData.length; i++) {
  23. sumValue += pieData[i].value
  24. const seriesItem = {
  25. name:
  26. typeof pieData[i].name === 'undefined'
  27. ? `series${i}`
  28. : pieData[i].name,
  29. type: 'surface',
  30. parametric: true,
  31. wireframe: {
  32. show: false
  33. },
  34. pieData: pieData[i],
  35. pieStatus: {
  36. selected: false,
  37. hovered: false,
  38. k: k
  39. },
  40. center: ['10%', '50%']
  41. }
  42. if (typeof pieData[i].itemStyle !== 'undefined') {
  43. const itemStyle = {}
  44. itemStyle.color =
  45. typeof pieData[i].itemStyle.color !== 'undefined'
  46. ? pieData[i].itemStyle.color
  47. : opacity
  48. itemStyle.opacity =
  49. typeof pieData[i].itemStyle.opacity !== 'undefined'
  50. ? pieData[i].itemStyle.opacity
  51. : opacity
  52. seriesItem.itemStyle = itemStyle
  53. }
  54. series.push(seriesItem)
  55. }
  56. // 使用上一次遍历时,计算出的数据和 sumValue,调用 getParametricEquation 函数,
  57. // 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。
  58. legendData = []
  59. legendBfb = []
  60. for (let i = 0; i < series.length; i++) {
  61. endValue = startValue + series[i].pieData.value
  62. series[i].pieData.startRatio = startValue / sumValue
  63. series[i].pieData.endRatio = endValue / sumValue
  64. series[i].parametricEquation = getParametricEquation(
  65. series[i].pieData.startRatio,
  66. series[i].pieData.endRatio,
  67. false,
  68. false,
  69. k,
  70. series[i].pieData.value
  71. )
  72. startValue = endValue
  73. const bfb = fomatFloat(series[i].pieData.value / sumValue, 4)
  74. legendData.push({
  75. name: series[i].name,
  76. value: bfb
  77. })
  78. legendBfb.push({
  79. name: series[i].name,
  80. value: bfb
  81. })
  82. }
  83. const boxHeight = getHeight3D(series, pieHeight) // 通过pieHeight设定3d饼/环的高度,单位是px
  84. // 准备待返回的配置项,把准备好的 legendData、series 传入。
  85. const option = {
  86. legend: {
  87. show: false,
  88. data: legendData,
  89. orient: 'vertical',
  90. left: 10,
  91. top: 10,
  92. itemGap: 10,
  93. textStyle: {
  94. color: '#A1E2FF'
  95. },
  96. icon: 'circle',
  97. formatter: function (param) {
  98. const item = legendBfb.filter(item => item.name === param)[0]
  99. const bfs = fomatFloat(item.value * 100, 2) + '%'
  100. return `${item.name} ${bfs}`
  101. }
  102. },
  103. labelLine: {
  104. show: true,
  105. lineStyle: {
  106. color: '#fff'
  107. }
  108. },
  109. label: {
  110. show: true,
  111. position: 'outside',
  112. formatter: '{b} \n{c} {d}%'
  113. },
  114. // tooltip: {
  115. // backgroundColor: '#033b77',
  116. // borderColor: '#21f2c4',
  117. // textStyle: {
  118. // color: '#fff',
  119. // fontSize: 13
  120. // },
  121. // formatter: params => {
  122. // if (
  123. // params.seriesName !== 'mouseoutSeries' &&
  124. // params.seriesName !== 'pie2d'
  125. // ) {
  126. // const bfb = (
  127. // (option.series[params.seriesIndex].pieData.endRatio -
  128. // option.series[params.seriesIndex].pieData.startRatio) *
  129. // 100
  130. // ).toFixed(2)
  131. // return (
  132. // `${params.seriesName}<br/>` +
  133. // `<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
  134. // `${bfb}%`
  135. // )
  136. // }
  137. // }
  138. // },
  139. xAxis3D: {
  140. min: -1,
  141. max: 1
  142. },
  143. yAxis3D: {
  144. min: -1,
  145. max: 1
  146. },
  147. zAxis3D: {
  148. min: -1,
  149. max: 1
  150. },
  151. grid3D: {
  152. show: false,
  153. width:'80%',
  154. height:'80%',
  155. left:'10%',
  156. top:'10%',
  157. boxHeight: boxHeight, // 圆环的高度
  158. viewControl: {
  159. // 3d效果可以放大、旋转等
  160. alpha:40, // 角度
  161. distance:400, // 调整视角到主体的距离,类似调整zoom
  162. rotateSensitivity: 0, // 设置为0无法旋转
  163. zoomSensitivity: 0, // 设置为0无法缩放
  164. panSensitivity: 0, // 设置为0无法平移
  165. autoRotate: false // 自动旋转
  166. }
  167. },
  168. series: series
  169. }
  170. return option
  171. }
  172. /**
  173. * 生成扇形的曲面参数方程,用于 series-surface.parametricEquation
  174. */
  175. const getParametricEquation = (startRatio, endRatio, isSelected, isHovered, k, h) => {
  176. // 计算
  177. const midRatio = (startRatio + endRatio) / 2
  178. const startRadian = startRatio * Math.PI * 2
  179. const endRadian = endRatio * Math.PI * 2
  180. const midRadian = midRatio * Math.PI * 2
  181. // 如果只有一个扇形,则不实现选中效果。
  182. if (startRatio === 0 && endRatio === 1) {
  183. isSelected = false
  184. }
  185. // 通过扇形内径/外径的值,换算出辅助参数 k(默认值 1/3)
  186. k = typeof k !== 'undefined' ? k : 1 / 3
  187. // 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)
  188. const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0
  189. const offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0
  190. // 计算高亮效果的放大比例(未高亮,则比例为 1)
  191. const hoverRate = isHovered ? 1.05 : 1
  192. // 返回曲面参数方程
  193. return {
  194. u: {
  195. min: -Math.PI,
  196. max: Math.PI * 3,
  197. step: Math.PI / 32
  198. },
  199. v: {
  200. min: 0,
  201. max: Math.PI * 2,
  202. step: Math.PI / 20
  203. },
  204. x: function (u, v) {
  205. if (u < startRadian) {
  206. return (
  207. offsetX +
  208. Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
  209. )
  210. }
  211. if (u > endRadian) {
  212. return (
  213. offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
  214. )
  215. }
  216. return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate
  217. },
  218. y: function (u, v) {
  219. if (u < startRadian) {
  220. return (
  221. offsetY +
  222. Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
  223. )
  224. }
  225. if (u > endRadian) {
  226. return (
  227. offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
  228. )
  229. }
  230. return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate
  231. },
  232. z: function (u, v) {
  233. if (u < -Math.PI * 0.5) {
  234. return Math.sin(u)
  235. }
  236. if (u > Math.PI * 2.5) {
  237. return Math.sin(u) * h * 0.1
  238. }
  239. return Math.sin(v) > 0 ? 1 * h * 0.1 : -1
  240. }
  241. }
  242. }
  243. /**
  244. * 获取3d丙图的最高扇区的高度
  245. */
  246. const getHeight3D = (series, height) => {
  247. series.sort((a, b) => {
  248. return b.pieData.value - a.pieData.value
  249. })
  250. return (height * 25) / series[0].pieData.value
  251. }
  252. /**
  253. * 格式化浮点数
  254. */
  255. const fomatFloat = (num, n) => {
  256. let f = parseFloat(num)
  257. if (isNaN(f)) {
  258. return false
  259. }
  260. f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n) // n 幂
  261. let s = f.toString()
  262. let rs = s.indexOf('.')
  263. // 判定如果是整数,增加小数点再补0
  264. if (rs < 0) {
  265. rs = s.length
  266. s += '.'
  267. }
  268. while (s.length <= rs + n) {
  269. s += '0'
  270. }
  271. return s
  272. }
  273. export { getPie3D, getParametricEquation }