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PolylineVolumeOutlineGeometry

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

具有体积的折线的描述（沿折线拉伸的 2D 形状）。 A description of a polyline with a volume (a 2D shape extruded along a polyline).
名称 Name 类型 Type 说明 Description
options object 具有以下属性的对象： Object with the following properties:
名称 Name 类型 Type 默认值 Default 说明 Description
polylinePositions Array.<Cartesian3> 定义折线体积中心的位置数组。 An array of positions that define the center of the polyline volume.
shapePositions Array.<Cartesian2> 定义要沿折线挤出的形状的位置数组 An array of positions that define the shape to be extruded along the polyline
ellipsoid Ellipsoid Ellipsoid.default 可选 optional 用作参考的椭球体。 The ellipsoid to be used as a reference.
granularity number CesiumMath.RADIANS_PER_DEGREE 可选 optional 每个纬度和经度之间的距离（以弧度为单位）。确定缓冲区中的位置数。 The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
cornerType CornerType CornerType.ROUNDED 可选 optional 确定角的样式。 Determines the style of the corners.
示例： 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 volumeOutline = new Cesium.PolylineVolumeOutlineGeometry({
  polylinePositions : Cesium.Cartesian3.fromDegreesArray([
    -72.0, 40.0,
    -70.0, 35.0
  ]),
  shapePositions : computeCircle(100000.0)
});
另见： See:
  • PolylineVolumeOutlineGeometry#createGeometry

成员 Members

packedLength : number
engine/Source/Core/PolylineVolumeOutlineGeometry.js 138

用于将对象打包到数组中的元素数量。 The number of elements used to pack the object into an array.

方法 Methods

static Cesium.PolylineVolumeOutlineGeometry.createGeometry(polylineVolumeOutlineGeometry) → Geometry|undefined
engine/Source/Core/PolylineVolumeOutlineGeometry.js 263

计算具有体积的折线轮廓的几何表示，包括其顶点、索引和边界球。 Computes the geometric representation of the outline of a polyline with a volume, including its vertices, indices, and a bounding sphere.
名称 Name 类型 Type 说明 Description
polylineVolumeOutlineGeometry PolylineVolumeOutlineGeometry 折线体积轮廓的描述。 A description of the polyline volume outline.
返回： Returns:
计算的顶点和索引。 The computed vertices and indices.

static Cesium.PolylineVolumeOutlineGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/PolylineVolumeOutlineGeometry.js 150

将提供的实例存储到提供的数组中。 Stores the provided instance into the provided array.
名称 Name 类型 Type 默认值 Default 说明 Description
value PolylineVolumeOutlineGeometry 包装的价值。 The value to pack.
array Array.<number> 要打包到的数组。 The array to pack into.
startingIndex number 0 可选 optional 开始打包元素的数组索引。 The index into the array at which to start packing the elements.
返回： Returns:
被打包成的数组 The array that was packed into

static Cesium.PolylineVolumeOutlineGeometry.unpack(array, startingIndex, result) → PolylineVolumeOutlineGeometry
engine/Source/Core/PolylineVolumeOutlineGeometry.js 207

从打包数组中检索实例。 Retrieves an instance from a packed array.
名称 Name 类型 Type 默认值 Default 说明 Description
array Array.<number> 打包的数组。 The packed array.
startingIndex number 0 可选 optional 要解包的元素的起始索引。 The starting index of the element to be unpacked.
result PolylineVolumeOutlineGeometry 可选 optional 用于存储结果的对象。 The object into which to store the result.
返回： Returns:
修改后的结果参数或新的 PolylineVolumeOutlineGeometry 实例（如果未提供）。 The modified result parameter or a new PolylineVolumeOutlineGeometry instance if one was not provided.
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