CircleGeometry
查阅Mars3D API

new Cesium.CircleGeometry(options)
engine/Source/Core/CircleGeometry.js 39

A description of a circle on the ellipsoid. Circle geometry can be rendered with both Primitive and GroundPrimitive.
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
center Cartesian3 The circle's center point in the fixed frame.
radius number The radius in meters.
ellipsoid Ellipsoid Ellipsoid.default 可选 The ellipsoid the circle will be on.
height number 0.0 可选 The distance in meters between the circle and the ellipsoid surface.
granularity number 0.02 可选 The angular distance between points on the circle in radians.
vertexFormat VertexFormat VertexFormat.DEFAULT 可选 The vertex attributes to be computed.
extrudedHeight number 0.0 可选 The distance in meters between the circle's extruded face and the ellipsoid surface.
stRotation number 0.0 可选 The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
Throws:
使用示例:
// Create a circle.
const circle = new Cesium.CircleGeometry({
  center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
  radius : 100000.0
});
const geometry = Cesium.CircleGeometry.createGeometry(circle);
参考:

成员(属性)

static Cesium.CircleGeometry.packedLength : number
engine/Source/Core/CircleGeometry.js 67

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

方法

static Cesium.CircleGeometry.createGeometry(circleGeometry) → Geometry|undefined
engine/Source/Core/CircleGeometry.js 157

Computes the geometric representation of a circle on an ellipsoid, including its vertices, indices, and a bounding sphere.
参数名称 类型 描述信息
circleGeometry CircleGeometry A description of the circle.
返回值:
The computed vertices and indices.

static Cesium.CircleGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/CircleGeometry.js 78

Stores the provided instance into the provided array.
参数名称 类型 默认值 描述信息
value CircleGeometry 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.CircleGeometry.unpack(array, startingIndex, result) → CircleGeometry
engine/Source/Core/CircleGeometry.js 112

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