描述位于地形或 3D Tiles 上的折线。仅与
GroundPolylinePrimitive 配合使用。
| Name | Type | Description | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
options |
object |
包含以下属性的对象：
|
Throws:
-
DeveloperError : 至少需要两个位置。
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:
Members
The type of path the polyline must follow. Valid options are
ArcType.GEODESIC and ArcType.RHUMB.
-
Default Value:
ArcType.GEODESIC
The distance interval used for interpolating options.points. Zero indicates no interpolation.
Default of 9999.0 allows centimeter accuracy with 32 bit floating point.
-
Default Value:
9999.0
Whether during geometry creation a line segment will be added between the last and first line positions to make this Polyline a loop.
If the geometry has two positions this parameter will be ignored.
-
Default Value:
false
The screen space width in pixels.
Methods
Stores the provided instance into the provided array.
| Name | Type | Default | Description |
|---|---|---|---|
value |
PolygonGeometry | The value to pack. | |
array |
Array.<number> | The array to pack into. | |
startingIndex |
number |
0
|
optional The index into the array at which to start packing the elements. |
Returns:
The array that was packed into
Retrieves an instance from a packed array.
| Name | Type | Default | Description |
|---|---|---|---|
array |
Array.<number> | The packed array. | |
startingIndex |
number |
0
|
optional The starting index of the element to be unpacked. |
result |
PolygonGeometry | optional The object into which to store the result. |