Class: PolygonGeometry

// 1. create a polygon from points
var polygon = new SuperMap3D.PolygonGeometry({
  polygonHierarchy : new SuperMap3D.PolygonHierarchy(
    SuperMap3D.Cartesian3.fromDegreesArray([
      -72.0, 40.0,
      -70.0, 35.0,
      -75.0, 30.0,
      -70.0, 30.0,
      -68.0, 40.0
    ])
  )
});
var geometry = SuperMap3D.PolygonGeometry.createGeometry(polygon);

// 2. create a nested polygon with holes
var polygonWithHole = new SuperMap3D.PolygonGeometry({
  polygonHierarchy : new SuperMap3D.PolygonHierarchy(
    SuperMap3D.Cartesian3.fromDegreesArray([
      -109.0, 30.0,
      -95.0, 30.0,
      -95.0, 40.0,
      -109.0, 40.0
    ]),
    [new SuperMap3D.PolygonHierarchy(
      SuperMap3D.Cartesian3.fromDegreesArray([
        -107.0, 31.0,
        -107.0, 39.0,
        -97.0, 39.0,
        -97.0, 31.0
      ]),
      [new SuperMap3D.PolygonHierarchy(
        SuperMap3D.Cartesian3.fromDegreesArray([
          -105.0, 33.0,
          -99.0, 33.0,
          -99.0, 37.0,
          -105.0, 37.0
        ]),
        [new SuperMap3D.PolygonHierarchy(
          SuperMap3D.Cartesian3.fromDegreesArray([
            -103.0, 34.0,
            -101.0, 34.0,
            -101.0, 36.0,
            -103.0, 36.0
          ])
        )]
      )]
    )]
  )
});
var geometry = SuperMap3D.PolygonGeometry.createGeometry(polygonWithHole);

// 3. create extruded polygon
var extrudedPolygon = new SuperMap3D.PolygonGeometry({
  polygonHierarchy : new SuperMap3D.PolygonHierarchy(
    SuperMap3D.Cartesian3.fromDegreesArray([
      -72.0, 40.0,
      -70.0, 35.0,
      -75.0, 30.0,
      -70.0, 30.0,
      -68.0, 40.0
    ])
  ),
  extrudedHeight: 300000
});
var geometry = SuperMap3D.PolygonGeometry.createGeometry(extrudedPolygon);

Members

packedLengthNumber

The number of elements used to package an object into an array.

Methods

static createGeometry(polygonGeometry){Geometry|undefined}

Calculate the geometric representation of polygons, including vertices, indices, and bounding balls.

Name	Type	Description
polygonGeometry	PolygonGeometry	Description of polygons.

Returns:

Type	Description
Geometry | undefined	Calculated vertices and indices.

static fromPositions(){PolygonGeometry}

A polygon description defined by a vertex coordinate array. Its geometry can be rendered in two ways: Primitive and GroundPrimitive.

Name	Type	Default	Description
options.positions	Array.<Cartesian3>		Define the position array of polygon corners.
options.height	Number	0.0	optional The height of the polygon.
options.extrudedHeight	Number		optional Squeeze out the height of the polygon.
options.vertexFormat	VertexFormat	VertexFormat.DEFAULT	optional The vertex attributes to be calculated.
options.stRotation	Number	0.0	optional The rotation angle of texture coordinates, measured in radians. Positive rotation is counterclockwise.
options.ellipsoid	Ellipsoid	Ellipsoid.WGS84	optional An ellipsoid used as a reference.
options.granularity	Number	Math.RADIANS_PER_DEGREE	optional The distance between each latitude and longitude (in radians). Determine the number of positions in the buffer.
options.perPositionHeight	Boolean	false	optional Use the height of options.positions for each position instead of using options.height to determine the height.
options.closeTop	Boolean	true	optional When false, the top of the extruded polygon will be opened.
options.closeBottom	Boolean	true	optional When false, the bottom of the extruded polygon is not open.

See:

• PolygonGeometry#createGeometry

Returns:

Type	Description
PolygonGeometry

Example

// create a polygon from points
var polygon = SuperMap3D.PolygonGeometry.fromPositions({
  positions : SuperMap3D.Cartesian3.fromDegreesArray([
    -72.0, 40.0,
    -70.0, 35.0,
    -75.0, 30.0,
    -70.0, 30.0,
    -68.0, 40.0
  ])
});
var geometry = SuperMap3D.PolygonGeometry.createGeometry(polygon);

static pack(value, array, startingIndex){Array.<Number>}

Store the provided instance in the provided array.

Name	Type	Default	Description
value	PolygonGeometry		The value to be packaged.
array	Array.<Number>		The array to be loaded.
startingIndex	Number	0	optional Start packaging the index of the array of elements.

Returns:

Type	Description
Array.<Number>	The array that has been loaded.

static unpack(array, startingIndex, result)

Retrieve instances from the packaged array.

Name	Type	Default	Description
array	Array.<Number>		Package the array.
startingIndex	Number	0	optional The starting index of the element to be decompressed.
result	PolygonGeometry		optional The object in which to store the results.