原文链接及内容

原文链接：https://sandcastle.cesium.com/?src=CZML%20Polyline%20Volume.html&label=All

实现效果如下：

示例代码如下：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
const czml = [
  {
    id: "document",
    name: "CZML Geometries: Polyline Volume",
    version: "1.0",
  },
  {
    id: "greenBox",
    name: "Green box with beveled corners and outline",
    polylineVolume: {
      positions: {//路径坐标（经度,纬度,高度）：3个点
        cartographicDegrees: [
          -90.0, 32.0, 0,
          -90.0, 36.0, 100000, 
          -94.0, 36.0, 0,
        ],
      },
      /**
       * shape属性：截面形状，采用了局部坐标系XY平面
       * 坐标原点为路径上的点，
       * 我们可以采用数学上的象限来定义界面的坐标。
       */
      shape: {
        cartesian2: [
          -50000, -50000, //左下，第三象限
          50000, -50000,  //右下，第四象限
          50000, 50000,  //右上，第一象限
          -50000, 50000 //左上，第二象限
        ],
      },
      cornerType: "BEVELED",
      material: {
        solidColor: {
          color: {
            rgba: [0, 255, 0, 128],
          },
        },
      },
      outline: true,
      outlineColor: {
        rgba: [255, 255, 255, 255],
      },
    },
  },
  {
    id: "blueStar",
    name: "Blue star with mitered corners and outline",
    polylineVolume: {
      positions: {
        cartographicDegrees: [
          -95.0, 32.0, 0,
          -95.0, 36.0, 100000, 
          -99.0, 36.0, 200000,
        ],
      },
      shape: {
        cartesian2: [
          70000, 0, 
          45048.44339512096, 21694.186955877907, 
          43644.28613011135, 54728.203772762085, 
          11126.046697815722, 48746.39560909118,
          -15576.465376942004, 68244.95385272766, 
          -31174.490092936674, 39091.57412340149, 
          -63067.82075316933, 30371.861738229076, 
          -50000,6.123233995736766e-12, 
          -63067.82075316934, -30371.86173822906,
          -31174.490092936685, -39091.574123401486, 
          -15576.465376942022, -68244.95385272766, 
          11126.046697815711, -48746.39560909118,
          43644.28613011134, -54728.20377276209, 
          45048.44339512095, -21694.186955877918,
        ],
      },
      cornerType: "MITERED",
      material: {
        solidColor: {
          color: {
            rgba: [0, 0, 255, 255],
          },
        },
      },
      outline: true,
      outlineColor: {
        rgba: [255, 255, 255, 255],
      },
    },
  },
];

const viewer = new Cesium.Viewer("cesiumContainer");
const dataSourcePromise = Cesium.CzmlDataSource.load(czml);
viewer.dataSources.add(dataSourcePromise);
viewer.zoomTo(dataSourcePromise);

关于CornerType属性如下图所示：