# SimplePolylineGeometry

#### new Cesium.SimplePolylineGeometry(options) @cesium/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.
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.
`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.
`arcType` ArcType `ArcType.GEODESIC` optional The type of line the polyline segments must follow.
`granularity` number `CesiumMath.RADIANS_PER_DEGREE` optional 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.default` optional The ellipsoid to be used as a reference.
##### Example:
``````// 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);``````
##### See:
• SimplePolylineGeometry#createGeometry

### Members

#### packedLength : number @cesium/engine/Source/Core/SimplePolylineGeometry.js 127

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

### Methods

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

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

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

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

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

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