# SimplePolylineGeometry

#### 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.

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.WGS84` | optional The ellipsoid to be used as a reference.

##### Throws:

- DeveloperError : At least two positions are required.
- DeveloperError : colors has an invalid length.

##### 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
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
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>
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
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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