Vue echarts4 3D曲面图（数据可视化）

第一步：在Vue项目中安装echarts和echarts-gl

npm install echarts --save
npm install echarts-gl --save

如果需要安装指定版本或是更新项目中的echarts版本，都可直接在npm命令后加入版本号，例如：

npm install echarts@4.1.0 --save 
npm install echarts-gl@1.1.0 --save 

第二步：在main.js或是具体页面中引入

import echarts from 'echarts'
import 'echarts-gl' //制作3D图 数据可视化相关图表时需引入
import 'echarts/lib/component/visualMap' //按需引入

第三步：init echarts图（注意：最好使用ref，而不要用getElementById），设置option配置项
配置项主要是看echarts官网的配置项手册，里面的配置项很多很多，需要仔细看！

visualMap是echarts的一个视觉映射组件，可以映射相关图像，配置其颜色大小透明度等等。
dimension指定用数据的『哪个维度』，映射到视觉元素上，
例如：
dimension： 0，
series.data: [ [12, 23, 43],[12, 23, 43],[43, 545, 65], [92, 23, 33]]
那么这个时候取的就是(12,12,43,92)。
其实文档上都写的很清楚，但是一定要看仔细！！！博主当时就看差了，导致3D曲面的渐变调了好久。。。

下面是博主试写的一个[3D曲面+散点图]和配置项：

option = {
    tooltip: {},
    backgroundColor: '#fff',
    visualMap: [{
        show: false,
        dimension:0,//按照x轴渐变
        min: 0,//TODO需要根据数据动态调整
        max: 1800,//TODO需要根据数据动态调整
    // let mapMax = Math.max(...data.map(item => item[2]));
    // let mapMin = Math.min(...data.map(item => item[2]));
        seriesIndex: 0,
        target: {
            inRange: {
            color: ['rgba(168,172,249,0.6)','rgba(130,103,191,0.6)', 'rgba(160,82,164,0.8)','rgba(190,247,212,0.6)', 'rgba(215,237,192,0.6)','rgba(246,143,137,0.6)']
            // color: ['red','green']
            }
        },

    },{
        show: false,
        seriesIndex: 1,
        target: {
            inRange: {
                symbolSize: [10, 20],
                color: 'red'
            },
        }
    }],
    xAxis3D: {
        type: 'value',
        name: 'x',
        splitArea: {
            show: true,
            areaStyle: {
                color: ['rgb(248,248,248)','rgb(248,248,248)']
            }
        }
    },
    yAxis3D: {
        type: 'value',
        name: 'y',
        splitArea: {
            show: true,
            areaStyle: {
                color: ['rgb(248,248,248)','rgb(248,248,248)']
            }
        }
    },
    zAxis3D: {
        type: 'value',
        name: 'z',
        splitArea: {
            show: true,
            areaStyle: {
                color: ['rgb(248,248,248)','rgb(248,248,248)']
            }
        }
    },
    grid3D: {
        // environment: 'rgb(248,248,248)',
        viewControl: {
            // projection: 'orthographic'
            // beta: -45
        }
    },
    series: [{
        type: 'surface',
        name: 'test',
        wireframe: {
            show: false
        },
        zlevel: -10,
        data: [
            [0,20,0.006],[1000,20,0.009],[1200,20,0.0095],[1500,20,0.010],
            // [0,40,0.016],[1000,40,0.022],[1200,40,0.024],[1500,40,0.025],
            [0,60,0.006],[1000,60,0.012],[1200,60,0.014],[1500,60,0.015],
            [0,80,0.008],[1000,80,0.015],[1200,80,0.017],[1500,80,0.020],
            [0,100,0.015],[1000,100,0.022],[1200,100,0.026],[1500,100,0.032],
        ] 
        //这里的点坐标是随便写的，但是需要一定的规律，否则可能渲染不出来。
        //比如博主这里写的是：
        //第一行固定y=20，x和z改变；
        //第二行固定y=40，同时x按照第一排x的规律写，z自由改变，以此类推...（仅个人猜测）
       
    },{
        type: 'scatter3D',
        // symbol: 'circle',
        symbol: 'path://M30.9,53.2C16.8,53.2,5.3,41.7,5.3,27.6S16.8,2,30.9,2C45,2,56.4,13.5,56.4,27.6S45,53.2,30.9,53.2z M30.9,3.5C17.6,3.5,6.8,14.4,6.8,27.6c0,13.3,10.8,24.1,24.101,24.1C44.2,51.7,55,40.9,55,27.6C54.9,14.4,44.1,3.5,30.9,3.5z M36.9,35.8c0,0.601-0.4,1-0.9,1h-1.3c-0.5,0-0.9-0.399-0.9-1V19.5c0-0.6,0.4-1,0.9-1H36c0.5,0,0.9,0.4,0.9,1V35.8z M27.8,35.8 c0,0.601-0.4,1-0.9,1h-1.3c-0.5,0-0.9-0.399-0.9-1V19.5c0-0.6,0.4-1,0.9-1H27c0.5,0,0.9,0.4,0.9,1L27.8,35.8L27.8,35.8z',
        zlevel: 10,
        itemStyle:{
            color: 'black'
        },
        data:[
            [600,28,0.007],[1109,27,0.007],[1763,88,0.064]
        ]
    }]
}

Tips：
1.注意echarts的版本和echarts-gl的版本是否匹配。原先项目中echarts为3.8.5的版本，而echarts-gl@1.1.1要求echarts版本4.0以上，需要更新项目的echarts版本，否则无法顺利import ‘echarts-gl’（开发者工具中会提示报错信息）【更新echarts版本时，若注意与项目中原先echats图的匹配！】

2.echarts3.8.5和echarts4.1.0的版本在某些配置项的写法上还是存在差异的。所以在echarts编辑器中调试完成后，如果在项目中无法生效，有一个可能性是版本问题。比如说热力图中：

series: [{
  id: '',
  name: "",
  type: 'heatmap',
  coordinateSystem: 'cartesian2d',
  data: data,
  gridIndex: 0,
  itemStyle: {
      color: 'rgb(0,0,0,0)',
  }
}]

这里itemStyle中的color理论上可以调节每个色块的颜色，rgb(0,0,0,0)时色块应不显示。但是该设置在echarts3.8.5的版本中无效，热力图的色块仍显示默认颜色。而在echarts4中顺利生效。

3.type：surface曲面图中 data的设置应该是需要按照一定规律的
//比如博主这里写的是：
//第一行固定y=20，x和z改变；
//第二行固定y=40，同时x按照第一排x的规律写，z自由改变，以此类推…（仅个人猜测）

type: 'surface',
name: '多项式回归拟合结果',
wireframe: {
    show: false
},
zlevel: -10,
data: [
    [0,20,0.006],[1000,20,0.009],[1200,20,0.0095],[1500,20,0.010],
    // [0,40,0.016],[1000,40,0.022],[1200,40,0.024],[1500,40,0.025],
    [0,60,0.006],[1000,60,0.012],[1200,60,0.014],[1500,60,0.015],
    [0,80,0.008],[1000,80,0.015],[1200,80,0.017],[1500,80,0.020],
    [0,100,0.015],[1000,100,0.022],[1200,100,0.026],[1500,100,0.032],
] 
//这里的点坐标是随便写的，但是需要一定的规律，否则可能渲染不出来。

4.若想要使曲面变得更平滑，博主目前想到两个方法：
一种是增大数据量，另一种就是设置坐标轴的min和max

xAxis3D: {
    type: 'value',
    name: 'x',
    min: 0,
    max: 500,
    splitArea: {//坐标轴面网格区域颜色
        show: true,
        areaStyle: {
            color: ['rgb(248,248,248)','rgb(248,248,248)']
        }
    }
},