PolylineVolumeOutlineGeometry
查阅Mars3D API

new Cesium.PolylineVolumeOutlineGeometry(options)
engine/Source/Core/PolylineVolumeOutlineGeometry.js 110

A description of a polyline with a volume (a 2D shape extruded along a polyline).
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
polylinePositions Array.<Cartesian3> An array of positions that define the center of the polyline volume.
shapePositions Array.<Cartesian2> An array of positions that define the shape to be extruded along the polyline
ellipsoid Ellipsoid Ellipsoid.default 可选 The ellipsoid to be used as a reference.
granularity number CesiumMath.RADIANS_PER_DEGREE 可选 The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
cornerType CornerType CornerType.ROUNDED 可选 Determines the style of the corners.
使用示例:
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 volumeOutline = new Cesium.PolylineVolumeOutlineGeometry({
  polylinePositions : Cesium.Cartesian3.fromDegreesArray([
    -72.0, 40.0,
    -70.0, 35.0
  ]),
  shapePositions : computeCircle(100000.0)
});
参考:
  • PolylineVolumeOutlineGeometry#createGeometry

成员(属性)

packedLength : number
engine/Source/Core/PolylineVolumeOutlineGeometry.js 143

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

方法

static Cesium.PolylineVolumeOutlineGeometry.createGeometry(polylineVolumeOutlineGeometry) → Geometry|undefined
engine/Source/Core/PolylineVolumeOutlineGeometry.js 268

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

static Cesium.PolylineVolumeOutlineGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/PolylineVolumeOutlineGeometry.js 155

Stores the provided instance into the provided array.
参数名称 类型 默认值 描述信息
value PolylineVolumeOutlineGeometry 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.PolylineVolumeOutlineGeometry.unpack(array, startingIndex, result) → PolylineVolumeOutlineGeometry
engine/Source/Core/PolylineVolumeOutlineGeometry.js 212

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