Cesium JS API
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CoplanarPolygonOutlineGeometry

CoplanarPolygonOutlineGeometry是一个几何图形,由一个或多个二维多边形定义。该几何图形被用来绘制一个或多个多边形的描边。

语法

new Cesium.CoplanarPolygonOutlineGeometry(options);

参数

参数 类型 描述
options Object 一个对象,用来设置几何图形的属性。

options

名称 类型 描述
polygonHierarchy PolygonHierarchy 用于创建几何图形的层次结构对象。
height Number 可选项。定义多边形的高度,默认值是0。
extrudedHeight Number 可选项。定义多边形的挤压高度。
vertexFormat VertexFormat 可选项。定义顶点的格式,默认值是VertexFormat.DEFAULT。
ellipsoid Ellipsoid 可选项。用于定义多边形的椭球体,默认是WGS84椭球体。
granularity Number 可选项。定义多边形细节的程度,以弧度为单位,默认值为Cesium.Math.RADIANS_PER_DEGREE。

示例

var polygon = new Cesium.CoplanarPolygonOutlineGeometry({
  polygonHierarchy: new Cesium.PolygonHierarchy([
    new Cesium.PolygonHierarchy.Cartesian2(
      [-1000000, -1000000],
      [-1000000, 1000000],
      [1000000, 1000000],
      [1000000, -1000000]
    ),
  ]),
  height: 0,
  extrudedHeight: 0,
  vertexFormat: Cesium.VertexFormat.POSITION_ONLY,
  ellipsoid: Cesium.Ellipsoid.WGS84,
  granularity: Cesium.Math.RADIANS_PER_DEGREE,
});

描述

CoplanarPolygonOutlineGeometry继承于Geometry对象。这个几何对象表示一个或范围不超过半个球形的多边形的轮廓,该多边形用polygonHierarchy表示。这是一个几何层次结构,用多边形的方式定义了图形。

CoplanarPolygonOutlineGeometry的主要区别在于它没有显示多边形的填充。它只显示多边形的轮廓。

参考

https://cesium.com/docs/cesiumjs-ref-doc/CoplanarPolygonOutlineGeometry.html