kotlin-cesium-engine/cesium.engine/PolygonGeometry

PolygonGeometry

external class PolygonGeometry(options: PolygonGeometry.ConstructorOptions)(source)

A description of a polygon on the ellipsoid. The polygon is defined by a polygon hierarchy. Polygon geometry can be rendered with both Primitive and GroundPrimitive.

// 1. create a polygon from points
const polygon = new PolygonGeometry({
  polygonHierarchy : new PolygonHierarchy(
    Cartesian3.fromDegreesArray([
      -72.0, 40.0,
      -70.0, 35.0,
      -75.0, 30.0,
      -70.0, 30.0,
      -68.0, 40.0
    ])
  )
});
const geometry = PolygonGeometry.createGeometry(polygon);

// 2. create a nested polygon with holes
const polygonWithHole = new PolygonGeometry({
  polygonHierarchy : new PolygonHierarchy(
    Cartesian3.fromDegreesArray([
      -109.0, 30.0,
      -95.0, 30.0,
      -95.0, 40.0,
      -109.0, 40.0
    ]),
    [new PolygonHierarchy(
      Cartesian3.fromDegreesArray([
        -107.0, 31.0,
        -107.0, 39.0,
        -97.0, 39.0,
        -97.0, 31.0
      ]),
      [new PolygonHierarchy(
        Cartesian3.fromDegreesArray([
          -105.0, 33.0,
          -99.0, 33.0,
          -99.0, 37.0,
          -105.0, 37.0
        ]),
        [new PolygonHierarchy(
          Cartesian3.fromDegreesArray([
            -103.0, 34.0,
            -101.0, 34.0,
            -101.0, 36.0,
            -103.0, 36.0
          ])
        )]
      )]
    )]
  )
});
const geometry = PolygonGeometry.createGeometry(polygonWithHole);

// 3. create extruded polygon
const extrudedPolygon = new PolygonGeometry({
  polygonHierarchy : new PolygonHierarchy(
    Cartesian3.fromDegreesArray([
      -72.0, 40.0,
      -70.0, 35.0,
      -75.0, 30.0,
      -70.0, 30.0,
      -68.0, 40.0
    ])
  ),
  extrudedHeight: 300000
});
const geometry = PolygonGeometry.createGeometry(extrudedPolygon);