GroundPolylineGeometry - CesiumJS API 文档

new Cesium.GroundPolylineGeometry(options)

A description of a polyline on terrain or 3D Tiles. Only to be used with GroundPolylinePrimitive.

Name Type Description

options

object

下列属性的选项 :

Name	Type	Default	Description
`positions`	Array.<Cartesian3>		An array of `Cartesian3` defining the polyline's points. Heights above the ellipsoid will be ignored.
`width`	number	`1.0`	optional 屏幕空间宽度以像素表示.
`granularity`	number	`9999.0`	optional The distance interval in meters used for interpolating options.points. Defaults to 9999.0 meters. Zero indicates no interpolation.
`loop`	boolean	`false`	optional Whether during geometry creation a line segment will be added between the last and first line positions to make this Polyline a loop.
`arcType`	ArcType	`ArcType.GEODESIC`	optional The type of line the polyline segments must follow. Valid options are `ArcType.GEODESIC` and `ArcType.RHUMB`.

Throws:

DeveloperError : At least two positions are required.

Example:

const positions = Cesium.Cartesian3.fromDegreesArray([
  -112.1340164450331, 36.05494287836128,
  -112.08821010582645, 36.097804071380715,
  -112.13296079730024, 36.168769146801104
]);

const geometry = new Cesium.GroundPolylineGeometry({
  positions : positions
});

See:

GroundPolylinePrimitive

Members

arcType : ArcType

The type of path the polyline must follow. Valid options are ArcType.GEODESIC and ArcType.RHUMB.

Default Value: ArcType.GEODESIC

granularity : boolean

插值 NT 0 使用的距离间隔. 0表示没有内插. 默认的9999.0允许有32位浮点的厘米精度.

Default Value: 9999.0

loop : boolean

在几何创建过程中,是否会在最后一行位置和第一行位置之间添加一个线段,使这个Polyline成为循环. 如果几何具有两个位置,这个参数将被忽略.

Default Value: false

width : number

屏幕空间宽度以像素表示.

Methods

static Cesium.GroundPolylineGeometry.pack(value, array, startingIndex) → Array.<number>

将所提供的实例存储到所提供的数组中.

Name	Type	Default	Description
`value`	PolygonGeometry		包装的价值.
`array`	Array.<number>		装入的阵列.
`startingIndex`	number	`0`	optional The index into the array at which to start packing the elements.

Returns:

装入的阵列

static Cesium.GroundPolylineGeometry.unpack(array, startingIndex, result)

从组合的数组中获取实例 .

Name	Type	Default	Description
`array`	Array.<number>		装填的阵列.
`startingIndex`	number	`0`	optional The starting index of the element to be unpacked.
`result`	PolygonGeometry		optional 存储结果的对象.