SimplePolylineGeometry
查阅Mars3D API

new Cesium.SimplePolylineGeometry(options)
engine/Source/Core/SimplePolylineGeometry.js 89

A description of a polyline modeled as a line strip; the first two positions define a line segment, and each additional position defines a line segment from the previous position.
参数名称 类型 描述信息
options object Object with the following properties:
参数名称 类型 默认值 描述信息
positions Array.<Cartesian3> An array of Cartesian3 defining the positions in the polyline as a line strip.
colors Array.<Color> 可选 An Array of Color defining the per vertex or per segment colors.
colorsPerVertex boolean false 可选 A boolean that determines whether the colors will be flat across each segment of the line or interpolated across the vertices.
arcType ArcType ArcType.GEODESIC 可选 The type of line the polyline segments must follow.
granularity number CesiumMath.RADIANS_PER_DEGREE 可选 The distance, in radians, between each latitude and longitude if options.arcType is not ArcType.NONE. Determines the number of positions in the buffer.
ellipsoid Ellipsoid Ellipsoid.WGS84 可选 The ellipsoid to be used as a reference.
Throws:
使用示例:
// A polyline with two connected line segments
const polyline = new Cesium.SimplePolylineGeometry({
  positions : Cesium.Cartesian3.fromDegreesArray([
    0.0, 0.0,
    5.0, 0.0,
    5.0, 5.0
  ])
});
const geometry = Cesium.SimplePolylineGeometry.createGeometry(polyline);
参考:
  • SimplePolylineGeometry#createGeometry

成员(属性)

packedLength : number
engine/Source/Core/SimplePolylineGeometry.js 127

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

方法

static Cesium.SimplePolylineGeometry.createGeometry(simplePolylineGeometry) → Geometry|undefined
engine/Source/Core/SimplePolylineGeometry.js 256

Computes the geometric representation of a simple polyline, including its vertices, indices, and a bounding sphere.
参数名称 类型 描述信息
simplePolylineGeometry SimplePolylineGeometry A description of the polyline.
返回值:
The computed vertices and indices.

static Cesium.SimplePolylineGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/SimplePolylineGeometry.js 139

Stores the provided instance into the provided array.
参数名称 类型 默认值 描述信息
value SimplePolylineGeometry The value to pack.
array Array.<number> The array to pack into.
startingIndex number 0 可选 The index into the array at which to start packing the elements.
返回值:
The array that was packed into

static Cesium.SimplePolylineGeometry.unpack(array, startingIndex, result) → SimplePolylineGeometry
engine/Source/Core/SimplePolylineGeometry.js 187

Retrieves an instance from a packed array.
参数名称 类型 默认值 描述信息
array Array.<number> The packed array.
startingIndex number 0 可选 The starting index of the element to be unpacked.
result SimplePolylineGeometry 可选 The object into which to store the result.
返回值:
The modified result parameter or a new SimplePolylineGeometry instance if one was not provided.
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