原文链接及内容

原文链接：https://sandcastle.cesium.com/?src=Points.html&label=All

效果如下图所示：

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
94
95
96
97
98
99
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
const viewer = new Cesium.Viewer("cesiumContainer", {
  geocoder: false,
  homeButton: false,
  sceneModePicker: false,
  navigationHelpButton: false,
  navigationInstructionsInitiallyVisible: false,
  animation: false,
  timeline: false,
  fullscreenButton: false,
  skyBox: false,
  shouldAnimate: true,
  baseLayerPicker: false,
  shadows: true,
});
viewer.cesiumWidget.creditContainer.style.display = "none";

function addPoint() {
  Sandcastle.declare(addPoint);

  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
    point: {
      pixelSize: 10,
      color: Cesium.Color.YELLOW,
    },
  });
}

function setPointProperties() {
  Sandcastle.declare(setPointProperties);

  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
    point: {
      show: true, // default
      color: Cesium.Color.SKYBLUE, // default: WHITE
      pixelSize: 10, // default: 1
      outlineColor: Cesium.Color.YELLOW, // default: BLACK
      outlineWidth: 3, // default: 0
    },
  });
}

function changePointProperties() {
  Sandcastle.declare(changePointProperties);

  const entity = viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883, 300000.0),
    point: {
      pixelSize: 2,
    },
  });

  const point = entity.point;
  point.pixelSize = 20.0;
  point.color = Cesium.Color.YELLOW.withAlpha(0.33);
}

function addMultiplePoints() {
  Sandcastle.declare(addMultiplePoints);

  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
    point: {
      color: Cesium.Color.RED,
      pixelSize: 8,
    },
  });
  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-80.5, 35.14),
    point: {
      color: Cesium.Color.BLUE,
      pixelSize: 16,
    },
  });
  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-80.12, 25.46),
    point: {
      color: Cesium.Color.LIME,
      pixelSize: 32,
    },
  });
}

function scaleByDistance() {
  Sandcastle.declare(scaleByDistance);

  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
    point: {
      // 像素大小将乘以比例因子，因此在此示例中，大小范围将从 20px（近）到 5px（远）。
      pixelSize: 10,
      scaleByDistance: new Cesium.NearFarScalar(1.5e2, 2.0, 1.5e7, 0.5),
    },
  });
}

function fadeByDistance() {
  Sandcastle.declare(fadeByDistance);

  viewer.entities.add({
    position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
    point: {
      pixelSize: 20,
      translucencyByDistance: new Cesium.NearFarScalar(1.5e2, 1.0, 1.5e7, 0.2),
    },
  });
}

Sandcastle.addToolbarMenu([
  {
    text: "添加一个点",
    onselect: function () {
      addPoint();
      Sandcastle.highlight(addPoint);
    },
  },
  {
    text: "在创建时设置点属性",
    onselect: function () {
      setPointProperties();
      Sandcastle.highlight(setPointProperties);
    },
  },
  {
    text: "更改点的属性",
    onselect: function () {
      changePointProperties();
      Sandcastle.highlight(changePointProperties);
    },
  },
  {
    text: "添加多个点",
    onselect: function () {
      addMultiplePoints();
      Sandcastle.highlight(addMultiplePoints);
    },
  },
  {
    text: "按视距缩放(点)",
    onselect: function () {
      scaleByDistance();
      Sandcastle.highlight(scaleByDistance);
    },
  },
  {
    text: "根据视距淡入淡出",
    onselect: function () {
      fadeByDistance();
      Sandcastle.highlight(fadeByDistance);
    },
  },
]);

Sandcastle.reset = function () {
  viewer.entities.removeAll();
};