# PolylineGeometry

#### new Cesium.PolylineGeometry(options) Core/PolylineGeometry.js 115

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.
Name Type Description
`options` Object Object with the following properties:
Name Type Default Description
`positions` Array.<Cartesian3> An array of `Cartesian3` defining the positions in the polyline as a line strip.
`width` Number `1.0` optional The width in pixels.
`colors` Array.<Color> optional An Array of `Color` defining the per vertex or per segment colors.
`colorsPerVertex` Boolean `false` optional A boolean that determines whether the colors will be flat across each segment of the line or interpolated across the vertices.
`followSurface` Boolean `true` optional A boolean that determines whether positions will be adjusted to the surface of the ellipsoid via a great arc.
`granularity` Number `CesiumMath.RADIANS_PER_DEGREE` optional The distance, in radians, between each latitude and longitude if options.followSurface=true. Determines the number of positions in the buffer.
`vertexFormat` VertexFormat `VertexFormat.DEFAULT` optional The vertex attributes to be computed.
`ellipsoid` Ellipsoid `Ellipsoid.WGS84` optional The ellipsoid to be used as a reference.
##### Example:
``````// A polyline with two connected line segments
var polyline = new Cesium.PolylineGeometry({
positions : Cesium.Cartesian3.fromDegreesArray([
0.0, 0.0,
5.0, 0.0,
5.0, 5.0
]),
width : 10.0
});
var geometry = Cesium.PolylineGeometry.createGeometry(polyline);``````
##### See:
• PolylineGeometry#createGeometry

### Members

#### packedLength : Number Core/PolylineGeometry.js 151

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

### Methods

#### staticCesium.PolylineGeometry.createGeometry(polylineGeometry) → Geometry|undefined Core/PolylineGeometry.js 297

Computes the geometric representation of a polyline, including its vertices, indices, and a bounding sphere.
Name Type Description
`polylineGeometry` PolylineGeometry A description of the polyline.
##### Returns:
The computed vertices and indices.

#### staticCesium.PolylineGeometry.pack(value, array, startingIndex) → Array.<Number> Core/PolylineGeometry.js 163

Stores the provided instance into the provided array.
Name Type Default Description
`value` PolylineGeometry 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

#### staticCesium.PolylineGeometry.unpack(array, startingIndex, result) → PolylineGeometry Core/PolylineGeometry.js 228

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` PolylineGeometry optional The object into which to store the result.
##### Returns:
The modified result parameter or a new PolylineGeometry instance if one was not provided.