Common Cesium-Plugin MapboxGL-Plugin Leaflet-Plugin OpenLayers-Plugin Video-Plugin
API文档
类名 RiverGeometry

# new RiverGeometry(options)

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

参数:

名称 类型 默认值 描述
options Object

Object with the following properties:
polygonHierarchy PolygonHierarchy

A polygon hierarchy that can include holes.
height Number 0.0

The distance in meters between the polygon and the ellipsoid surface.
extrudedHeight Number

The distance in meters between the polygon's extruded face and the ellipsoid surface.
vertexFormat Cesium.VertexFormat Cesium.VertexFormat.DEFAULT

The vertex attributes to be computed.
indices Array.<Number>

自定义顶点索引
st Float32Array

自定义UV坐标
stRotation Number 0.0

The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
ellipsoid Cesium.Ellipsoid Cesium.Ellipsoid.WGS84

The ellipsoid to be used as a reference.
granularity Number Cesium.Math.RADIANS_PER_DEGREE

The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
perPositionHeight Boolean false

Use the height of options.positions for each position instead of using options.height to determine the height.
closeTop Boolean true

When false, leaves off the top of an extruded polygon open.
closeBottom Boolean true

When false, leaves off the bottom of an extruded polygon open.
arcType Cesium.ArcType Cesium.ArcType.GEODESIC

The type of line the polygon edges must follow. Valid options are Cesium.ArcType.GEODESIC and Cesium.ArcType.RHUMB.
See:
  • RiverGeometry#createGeometry
  • RiverGeometry#fromPositions
示例
// 1. create a polygon from points
var polygon = new Cesium.RiverGeometry({
  polygonHierarchy : new Cesium.PolygonHierarchy(
    Cesium.Cartesian3.fromDegreesArray([
      -72.0, 40.0,
      -70.0, 35.0,
      -75.0, 30.0,
      -70.0, 30.0,
      -68.0, 40.0
    ])
  )
});
var geometry = Cesium.RiverGeometry.createGeometry(polygon);

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

// 3. create extruded polygon
var extrudedPolygon = new Cesium.RiverGeometry({
  polygonHierarchy : new Cesium.PolygonHierarchy(
    Cesium.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 = Cesium.RiverGeometry.createGeometry(extrudedPolygon);

成员变量

# _indices

feat:2106 河流覆盖物类型 传入自定义顶点indices 传入自定义UV坐标

Number

# packedLength

The number of elements used to pack the object into an array.

方法

# static computeRectangle(options, resultopt)

Returns the bounding rectangle given the provided options

参数:

名称 类型 默认值 描述
options Object

Object with the following properties:
polygonHierarchy PolygonHierarchy

A polygon hierarchy that can include holes.
granularity Number Cesium.Math.RADIANS_PER_DEGREE

The distance, in radians, between each latitude and longitude. Determines the number of positions sampled.
arcType Cesium.ArcType Cesium.ArcType.GEODESIC

The type of line the polygon edges must follow. Valid options are Cesium.ArcType.GEODESIC and Cesium.ArcType.RHUMB.
ellipsoid Cesium.Ellipsoid Cesium.Ellipsoid.WGS84

The ellipsoid to be used as a reference.
result Cesium.Rectangle

An object in which to store the result.

The result rectangle

Cesium.Rectangle

# static createGeometry(polygonGeometry)

Computes the geometric representation of a polygon, including its vertices, indices, and a bounding sphere.

参数:

名称 类型 描述
polygonGeometry RiverGeometry

A description of the polygon.

The computed vertices and indices.

Cesium.Geometry | undefined

# static fromPositions(options)

A description of a polygon from an array of positions. Polygon geometry can be rendered with both Primitive and GroundPrimitive.

参数:

名称 类型 默认值 描述
options Object

Object with the following properties:
positions Array.<Cesium.Cartesian3>

An array of positions that Cesium.defined the corner points of the polygon.
height Number 0.0

The height of the polygon.
extrudedHeight Number

The height of the polygon extrusion.
vertexFormat Cesium.VertexFormat Cesium.VertexFormat.DEFAULT

The vertex attributes to be computed.
indices Array.<Number>

自定义顶点索引
st Float32Array

自定义UV坐标
stRotation Number 0.0

The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
ellipsoid Cesium.Ellipsoid Cesium.Ellipsoid.WGS84

The ellipsoid to be used as a reference.
granularity Number Cesium.Math.RADIANS_PER_DEGREE

The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
perPositionHeight Boolean false

Use the height of options.positions for each position instead of using options.height to determine the height.
closeTop Boolean true

When false, leaves off the top of an extruded polygon open.
closeBottom Boolean true

When false, leaves off the bottom of an extruded polygon open.
arcType Cesium.ArcType Cesium.ArcType.GEODESIC

The type of line the polygon edges must follow. Valid options are Cesium.ArcType.GEODESIC and Cesium.ArcType.RHUMB.
See:
  • RiverGeometry#createGeometry
RiverGeometry
示例
// create a polygon from points
var polygon = Cesium.RiverGeometry.fromPositions({
  positions : Cesium.Cartesian3.fromDegreesArray([
    -72.0, 40.0,
    -70.0, 35.0,
    -75.0, 30.0,
    -70.0, 30.0,
    -68.0, 40.0
  ])
});
var geometry = Cesium.RiverGeometry.createGeometry(polygon);

# static pack(value, array, startingIndexopt)

Stores the provided instance into the provided array.

参数:

名称 类型 默认值 描述
value RiverGeometry

The value to pack.
array Array.<Number>

The array to pack into.
startingIndex Number 0

The index into the array at which to start packing the elements.

The array that was packed into

Array.<Number>

# static unpack(array, startingIndexopt, resultopt)

Retrieves an instance from a packed array.

参数:

名称 类型 默认值 描述
array Array.<Number>

The packed array.
startingIndex Number 0

The starting index of the element to be unpacked.
result RiverGeometry

The object into which to store the result.
构造函数
成员变量
方法
事件