PolylineVolumeGeometry

new Cesium.PolylineVolumeGeometry(options)
engine/Source/Core/PolylineVolumeGeometry.js 209

A description of a polyline with a volume (a 2D shape extruded along a polyline).
Name Type Description
options object Object with the following properties:
Name Type Default Description
polylinePositions Array.<Cartesian3> An array of Cartesian3 positions that define the center of the polyline volume.
shapePositions Array.<Cartesian2> An array of Cartesian2 positions that define the shape to be extruded along the polyline
ellipsoid Ellipsoid Ellipsoid.default optional The ellipsoid to be used as a reference.
granularity number CesiumMath.RADIANS_PER_DEGREE optional The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
vertexFormat VertexFormat VertexFormat.DEFAULT optional The vertex attributes to be computed.
cornerType CornerType CornerType.ROUNDED optional Determines the style of the corners.
Example:
function computeCircle(radius) {
  const positions = [];
  for (let i = 0; i < 360; i++) {
    const radians = Cesium.Math.toRadians(i);
    positions.push(new Cesium.Cartesian2(radius * Math.cos(radians), radius * Math.sin(radians)));
  }
  return positions;
}

const volume = new Cesium.PolylineVolumeGeometry({
  vertexFormat : Cesium.VertexFormat.POSITION_ONLY,
  polylinePositions : Cesium.Cartesian3.fromDegreesArray([
    -72.0, 40.0,
    -70.0, 35.0
  ]),
  shapePositions : computeCircle(100000.0)
});
Demo:
See:
  • PolylineVolumeGeometry#createGeometry

Members

packedLength : number
engine/Source/Core/PolylineVolumeGeometry.js 245

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

Methods

static Cesium.PolylineVolumeGeometry.createGeometry(polylineVolumeGeometry) → Geometry|undefined
engine/Source/Core/PolylineVolumeGeometry.js 383

Computes the geometric representation of a polyline with a volume, including its vertices, indices, and a bounding sphere.
Name Type Description
polylineVolumeGeometry PolylineVolumeGeometry A description of the polyline volume.
Returns:
The computed vertices and indices.

static Cesium.PolylineVolumeGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/PolylineVolumeGeometry.js 258

Stores the provided instance into the provided array.
Name Type Default Description
value PolylineVolumeGeometry 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.PolylineVolumeGeometry.unpack(array, startingIndex, result) → PolylineVolumeGeometry
engine/Source/Core/PolylineVolumeGeometry.js 319

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