PolylineGeometry
查阅Mars3D API

new Cesium.PolylineGeometry(options)
engine/Source/Core/PolylineGeometry.js 100

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. The polyline is capable of displaying with a material.
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.
width number 1.0 可选 The width in pixels.
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.
vertexFormat VertexFormat VertexFormat.DEFAULT 可选 The vertex attributes to be computed.
ellipsoid Ellipsoid Ellipsoid.default 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.PolylineGeometry({
  positions : Cesium.Cartesian3.fromDegreesArray([
    0.0, 0.0,
    5.0, 0.0,
    5.0, 5.0
  ]),
  width : 10.0
});
const geometry = Cesium.PolylineGeometry.createGeometry(polyline);
Demo:
参考:
  • PolylineGeometry#createGeometry

成员(属性)

packedLength : number
engine/Source/Core/PolylineGeometry.js 148

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

方法

static Cesium.PolylineGeometry.createGeometry(polylineGeometry) → Geometry|undefined
engine/Source/Core/PolylineGeometry.js 299

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

static Cesium.PolylineGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/PolylineGeometry.js 161

Stores the provided instance into the provided array.
参数名称 类型 默认值 描述信息
value PolylineGeometry 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.PolylineGeometry.unpack(array, startingIndex, result) → PolylineGeometry
engine/Source/Core/PolylineGeometry.js 226

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 PolylineGeometry 可选 The object into which to store the result.
返回值:
The modified result parameter or a new PolylineGeometry instance if one was not provided.
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