RectangleGeometry - CesiumJS API 文档

new Cesium.RectangleGeometry(options)

A description of a cartographic rectangle on an ellipsoid centered at the origin. Rectangle geometry can be rendered with both Primitive and GroundPrimitive.

Name Type Description

options

object

下列属性的对象 :

Name	Type	Default	Description
`rectangle`	Rectangle		以弧度表示的具有北,南,东和西属性的制图矩.
`vertexFormat`	VertexFormat	`VertexFormat.DEFAULT`	optional The vertex attributes to be computed.
`ellipsoid`	Ellipsoid	`Ellipsoid.default`	optional The ellipsoid on which the rectangle lies.
`granularity`	number	`CesiumMath.RADIANS_PER_DEGREE`	optional The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
`height`	number	`0.0`	optional 矩形与椭圆形表面之间的米数距离.
`rotation`	number	`0.0`	optional 矩形的旋转,以弧度表示. 正旋转是逆时针.
`stRotation`	number	`0.0`	optional 纹理坐标的旋转,以弧度表示. 正旋转是逆时针.
`extrudedHeight`	number		optional 长方形外凸面与椭圆形表面之间以米为单位的距离.

Throws:

DeveloperError : options.rectangle.north must be in the interval [-Pi/2, Pi/2].
DeveloperError : options.rectangle.south must be in the interval [-Pi/2, Pi/2].
DeveloperError : options.rectangle.east must be in the interval [-Pi, Pi].
DeveloperError : options.rectangle.west must be in the interval [-Pi, Pi].
DeveloperError : options.rectangle.north must be greater than options.rectangle.south.

Example:

// 1. create a rectangle
const rectangle = new Cesium.RectangleGeometry({
  ellipsoid : Cesium.Ellipsoid.default,
  rectangle : Cesium.Rectangle.fromDegrees(-80.0, 39.0, -74.0, 42.0),
  height : 10000.0
});
const geometry = Cesium.RectangleGeometry.createGeometry(rectangle);

// 2. create an extruded rectangle without a top
const rectangle = new Cesium.RectangleGeometry({
  ellipsoid : Cesium.Ellipsoid.default,
  rectangle : Cesium.Rectangle.fromDegrees(-80.0, 39.0, -74.0, 42.0),
  height : 10000.0,
  extrudedHeight: 300000
});
const geometry = Cesium.RectangleGeometry.createGeometry(rectangle);

Demo:

Cesium Sandcastle Rectangle Demo

See:

RectangleGeometry#createGeometry

Members

static Cesium.RectangleGeometry.packedLength : number

用于将对象组合成数组的元素数量.

Methods

static Cesium.RectangleGeometry.computeRectangle(options, result) → Rectangle

根据提供的选项计算边框矩形

Name Type Description

options

object

下列属性的对象 :

Name	Type	Default	Description
`rectangle`	Rectangle		以弧度表示的具有北,南,东和西属性的制图矩.
`ellipsoid`	Ellipsoid	`Ellipsoid.default`	optional The ellipsoid on which the rectangle lies.
`granularity`	number	`CesiumMath.RADIANS_PER_DEGREE`	optional The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
`rotation`	number	`0.0`	optional 矩形的旋转,以弧度表示. 正旋转是逆时针.

result Rectangle optional 存储结果的对象 .

Returns:

结果矩形

static Cesium.RectangleGeometry.createGeometry(rectangleGeometry) → Geometry|undefined

计算一个矩形的几何表示,包括它的顶点,指数,和边框.

Name	Type	Description
`rectangleGeometry`	RectangleGeometry	长方形的描述.

Returns:

计算出的顶点和指数.

Throws:

DeveloperError : Rotated rectangle is invalid.

static Cesium.RectangleGeometry.pack(value, array, startingIndex) → Array.<number>

将所提供的实例存储到所提供的数组中.

Name	Type	Default	Description
`value`	RectangleGeometry		包装的价值.
`array`	Array.<number>		装入的阵列.
`startingIndex`	number	`0`	optional The index into the array at which to start packing the elements.

Returns:

装入的阵列

static Cesium.RectangleGeometry.unpack(array, startingIndex, result) → RectangleGeometry

从组合的数组中获取实例 .

Name	Type	Default	Description
`array`	Array.<number>		装填的阵列.
`startingIndex`	number	`0`	optional The starting index of the element to be unpacked.
`result`	RectangleGeometry		optional 存储结果的对象.

Returns:

未提供修改的结果参数或新的矩形图形实例 .