金子塔图，自定义图表，伪漏斗图

简易的金字塔图，设置不太灵活，可供使用者参考，需要使用者根据页面的需求复杂度等再做修改。

另附链接地址：https://www.isqqw.com/pcenter?userid=6427

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

// 原始数据
let data = [
   { name: '测试数据', value: 4 },
   { name: '测试原理', value: 2 },
   { name: '测试功能', value: 8 },
]
// 将数据根据从小到大排序
let newdata = sortObject(data);
// 图例数据
let lengthData = [];
// 返回数据
let resultData = data.map((item, index) => {
   let graw = item.value > 9 ? 78 : 83;
   lengthData.push({
      type: 'group',
      top: index * 25,
      scale: [1, 1],
      children: [
         {
            type: 'circle',
            shape: {
               cx: 0,
               cy: 7,
               r: 5
            },
            style: {
               fill:
                  index === 0 ? '#07a9ab' : index === 1 ? '#008CD2' : '#0847e7'
            }
         },
         {
            type: 'text',
            style: {
               text: item.name,
               fill: '#fff',
               fontSize: 14,
               x: 10,
               y: 2
            }
         },
         {
            type: 'text',
            name: item.name,
            style: {
               text: item.value,
               fill: '#fff',
               fontSize: 17,
               x: 70,
               y: 0
            }
         },
         {
            type: 'text',
            style: {
               text: '个',
               fill: '#fff',
               fontSize: 14,
               x: graw,
               y: 2
            }
         }
      ]
   });
   if (index === 0) {
      return {
         style: {
            fill: new echarts.graphic.LinearGradient(0, 0, 1, 0, [
               { offset: 0, color: '#07a9ab' },
               { offset: 1, color: '#09fffb' }
            ])
         },
         ...item
      };
   } else if (index === 1) {
      return {
         style: {
            fill: new echarts.graphic.LinearGradient(0, 0, 1, 0, [
               { offset: 0, color: '#025279' },
               { offset: 1, color: '#16a7ef' }
            ])
         },
         ...item
      };
   } else {
      return {
         style: {
            fill: new echarts.graphic.LinearGradient(0, 0, 1, 0, [
               { offset: 0, color: '#0332a9' },
               { offset: 1, color: '#0847e7' }
            ])
         },
         ...item
      };
   }
});
// 获取计算的数据
let getData = pyramidChart(
   resultData,
   document.getElementById('container')
);
option = {
   backgroundColor: '#022c32',
   graphic: [
      {
         type: 'group',
         left: '5%',
         top: 'center',
         scale: [1, 1],
         onclick: function (params) {
 
         },
         children: getData
      },
      {
         type: 'group',
         left: '55%',
         top: 'center',
         scale: [1, 1],
         onclick: function (params) {
 
         },
         children: lengthData
      }
   ],
   series: []
};
// 排序
function sortObject(arr) {
   return arr.sort(function (a, b) {
      return a['value'] - b['value'];
   });
}
// 数据处理
function pyramidChart(data = [], dom, option = {}) {
   let domHeight = dom ? dom.clientHeight : 0;
   let domWidth = dom ? dom.clientWidth : 0;
   // 默认获取一个正方形空间
   let maxDistance = domHeight > domWidth / 2 ? domWidth / 2 : domHeight;
   // 合并设置
   let resultOption = Object.assign(
      {
         slanted: 1, // 每层底部的倾斜度
         maxWidth: maxDistance, // 金字塔最大宽度
         maxHeight: maxDistance, // 金字塔最大高度
         offset: 35 //偏差
      },
      option
   );
   if (data.length === 1) {
      resultOption.slanted = 50;
   }
   if (data.length === 2) {
      resultOption.slanted = 25;
   }
   if (data.length === 3) {
      resultOption.slanted = 10;
   }
   // 减去多余的误差边距
   resultOption.maxHeight = resultOption.maxHeight - resultOption.offset;
   // 一半最大宽度,用于计算左右边距
   let halfMaxWidth = resultOption.maxWidth / 2;
   // 数据最终
   let resultData = [];
   // 数据值 数组
   let dataNums = data.map(item => item.value || 0);
   // 计算数据总和
   let dataNumSum =
      dataNums.length > 0 &&
      dataNums.reduce(function (prev, curr) {
         return Number(prev || 0) + Number(curr || 0);
      });
   // 中间数据点坐标数组 根据长度比值算出
   let midlinePoint = [];
   let multipleLayer = [0.6];
   // 计算倍数等基础数据
   dataNums.forEach((item, index, arr) => {
      let itemNext = arr[index + 1];
      if (itemNext) {
         multipleLayer.push(itemNext / dataNums[0]); // 计算倍数
      }
      // 计算点坐标 长度
      let point =
         Math.round((item / dataNumSum) * resultOption.maxHeight * 1000) / 1000;
      midlinePoint.push(point);
   });
   // 三角形的高度
   let triangleHeight = 0;
   let triangleHeightLayer = [];
   // 三角形tan角度
   let triangleRatio = halfMaxWidth / resultOption.maxHeight;
   midlinePoint.forEach(item => {
      triangleHeight = triangleHeight + item;
      triangleHeightLayer.push(triangleHeight);
   });
   // 中间数据点 最后的数据长度
   let midlinePointFinally =
      triangleHeightLayer[triangleHeightLayer.length - 1] || 0;
   // 开始拼接数据
   data.forEach((item, index) => {
      let arrObj = [];
      let triangleHeightLayerOne = triangleHeightLayer[index];
      let triangleHeightLayerOneLast = triangleHeightLayer[index - 1] || 0;
      let multipleLayerOne = multipleLayer[index];
      let multipleLayerOneLast = multipleLayer[index - 1] || 0;
      // 第一层数据单独处理
      if (index === 0) {
         arrObj.push(
            [0, 0],
            [
               -triangleRatio *
               (triangleHeightLayerOne - resultOption.slanted * multipleLayerOne),
               triangleHeightLayerOne - resultOption.slanted * multipleLayerOne
            ],
            [0, triangleHeightLayerOne],
            [
               triangleRatio *
               (triangleHeightLayerOne - resultOption.slanted * multipleLayerOne),
               triangleHeightLayerOne - resultOption.slanted * multipleLayerOne
            ]
         );
      } else {
         arrObj.push(
            [0, triangleHeightLayerOneLast],
            [
               -triangleRatio *
               (triangleHeightLayerOneLast -
                  resultOption.slanted * multipleLayerOneLast),
               triangleHeightLayerOneLast -
               resultOption.slanted * multipleLayerOneLast
            ],
            [
               -triangleRatio *
               (triangleHeightLayerOne - resultOption.slanted * multipleLayerOne),
               triangleHeightLayerOne - resultOption.slanted * multipleLayerOne
            ],
            [0, triangleHeightLayerOne],
            [
               triangleRatio *
               (triangleHeightLayerOne - resultOption.slanted * multipleLayerOne),
               triangleHeightLayerOne - resultOption.slanted * multipleLayerOne
            ],
            [
               triangleRatio *
               (triangleHeightLayerOneLast -
                  resultOption.slanted * multipleLayerOneLast),
               triangleHeightLayerOneLast -
               resultOption.slanted * multipleLayerOneLast
            ]
         );
      }
      resultData.push({
         type: 'polygon',
         z: 1,
         shape: {
            points: arrObj
         },
         name: item.name,
         style: item.style
      });
   });
   // 添加线
   resultData.push({
      type: 'polyline',
      shape: {
         points: [
            [0, 0],
            [0, midlinePointFinally]
         ]
      },
      style: {
         stroke: '#f2f2f2',
         opacity: 0.2,
         lineWidth: 1
      },
      z: 2
   });
   // 返回
   return resultData;
};