Cesium JS API
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RectangleOutlineGeometry

矩形轮廓几何体

描述:

定义了绘制矩形轮廓的几何体。

构造函数:

  • RectangleOutlineGeometry.rectangle(options) : 矩形轮廓几何体的构造函数。

参数:

  • options : Object类型,描述矩形的属性。属性包括:

    • rectangle : Rectangle类型, 矩形的位置和大小。
    • extrudedHeight : Number类型, 可选参数, 矩形的顶部或底部点的高度。
    • ellipsoid : Ellipsoid类型,此几何体相对于此椭球体的位置。
    • granularity : Number类型,可选参数,决定矩形的弯曲程度。

属性:

  • packedLength : RectangleOutlineGeometry类型的对象的长度,单位为字节。

函数:

  • RectangleOutlineGeometry.pack(value, array, startingIndex) : 将矩形轮廓几何体对象转换成二进制格式,存储到数组中。

参数:

  • value : 矩形轮廓几何体对象。

  • array : 将矩形轮廓几何体对象转换成存储二进制的数组。

  • startingIndex : 存储的起始位置。

  • RectangleOutlineGeometry.unpack(array, startingIndex, result) : 从数组中解析矩形轮廓几何体对象。

参数:

  • array : 矩形轮廓几何体对象的数组。

  • startingIndex : 数组的起始位置。

  • result : 存储解析后的矩形轮廓几何体对象。

  • RectangleOutlineGeometry.createGeometry(rectangleGeometry) : 根据矩形轮廓几何体对象生成几何体。

参数:

  • rectangleGeometry : 矩形轮廓几何体对象。

返回值:

  • 生成的几何体对象。

示例代码:

var rectangleGeometry = new Cesium.RectangleOutlineGeometry({
  rectangle : Cesium.Rectangle.fromDegrees(-100.0, 20.0, -90.0, 30.0),
  height: 200000.0});  
var geometry = Cesium.RectangleOutlineGeometry.createGeometry(rectangleGeometry);
viewer.entities.add({
  name : 'rectangle',
  polygon : {
    hierarchy : geometry,
    extrudedHeight: 0,
    material : Cesium.Color.BLUE.withAlpha(0.5),
  }
});

参考资料:

  • Cesium官方文档 http://cesiumjs.org/Cesium/Build/Documentation/RectangleOutlineGeometry.html