CoordinatesTransform

new GisEye.CoordinatesTransform(viewer)

初始化坐标转换对象

Name Type Description
viewer Cesium.Viewer

viewer对象
Example:
var ct=new GisEye.CoordinatesTransform(viewer)
var d=ct.cartesian3ToDegrees(new Cesium.Cartesin3(0,0,0))
console.log(d)
See:

Methods

static GisEye.CoordinatesTransform.alongLine(positions, distance) → Array.<Object>

计算等距离的沿线点并且带有每个点的方位角

Name Type Description
positions Array.<Cartesian3>
distance Number
Returns:

{position,hpr} 返回坐标点和角度值

Example:
let positions = [ new Cesium.Cartesian3(0,0,0), new Cesium.Cartesian3(1,0,0), new Cesium.Cartesian3(2,0,0) ]
let result = CoordinatesTransform.alongLine(positions, 0.5)

static GisEye.CoordinatesTransform.cartesian3ToDegrees(inCartesian3, viewer, result) → Array|undefined

将笛卡尔坐标转为经纬度坐标

Name Type Description
inCartesian3 Cartesian3

需要转换的笛卡尔坐标
viewer Viewer

viewer对象
result Array

返回值例如：[102,23,100]
Returns:

返回转换后的经纬度坐标例如：[102,23,100]

static GisEye.CoordinatesTransform.cartesian3ToWindowPosition(inCartesian3, viewer, result) → Cartesian2|undefined

笛卡尔坐标转为屏幕坐标

Name Type Description
inCartesian3 Cartesian3

需要转换的笛卡尔坐标
viewer Viewer

viewer对象
result Cartesian2

返回的屏幕坐标
Returns:

返回转换后的屏幕坐标

static GisEye.CoordinatesTransform.cartograhphicToWindowPosition(inCartographic, viewer, result) → Cartesian2|undefined

弧度制的地理坐标转换为屏幕坐标

Name Type Description
inCartographic Cartographic

需要转换的弧度制地理坐标
viewer Viewer

viewer对象
result Cartesian2

返回的屏幕坐标
Returns:

返回转换后的屏幕坐标

static GisEye.CoordinatesTransform.degreesToWindowPosition(inDegrees, viewer, result) → Cartesian2|undefined

经纬度转屏幕坐标

Name Type Description
inDegrees object

需要转换的经纬度值的对象
viewer Viewer

viewer对象
result Cartesian2

返回的屏幕坐标
Returns:

返回转换后的屏幕坐标

static GisEye.CoordinatesTransform.getAlongLineDistancePoint(positions, distance) → Object|undefined

获取从起始点开始的沿线距离处的坐标和角度（沿线的）信息

Name Type Description
positions Array.<Cartesian3>

点集合
distance Number

距离起点的距离
Returns:

static GisEye.CoordinatesTransform.getDistanceByTwoPoint(pointA, pointB) → Object

获取两个点之间的距离，包括空间距离、水平距离、垂直距离，以及垂足的点数据,垂足为高度低点所在的水平面的垂足点

Name Type Description
pointA Cartesina3

点A
pointB Cartesina3

点B
Returns:

height是垂直高度,diantanceH是水平距离,diantanceS是空间距离,hypPoint是垂足点

Example:
let result = CoordinatesTransform.getDistance(new Cesium.Cartesian3(0,0,0), new Cesium.Cartesian3(1,1,1))
console.log(result.height, result.diantanceH, result.diantanceS, result.hypPoint)

static GisEye.CoordinatesTransform.getHeading(pointA, pointB)

根据两点获取偏航角

Name Type Description
pointA Cartesian3

A点
pointB Cartesian3

B点
Returns:

heading 单位是弧度制的

Example:
GisEye.CoordinatesTransform.getHeading(new Cesium.Cartesian3(0,0,0),new Cesium.Cartesian3(1,0,0))

static GisEye.CoordinatesTransform.getHeadingPitch(pointA, pointB) → undefined|Object

根据两点获取方位角和俯仰角

Name Type Description
pointA Cartesian3

点A
pointB Cartesian3

点B
Returns:

返回带有heading和pitch的对象，如果点A和点B相等那么返回undefined

static GisEye.CoordinatesTransform.getHeadingPitchRoll(pointA, pointB) → HeadingPitchRoll

计算两点间的方位角俯仰角以及旋转角

Name Type Description
pointA Cartesian3

点A
pointB Cartesian3

点B
Returns:

返回方位角俯仰角以及旋转角

static GisEye.CoordinatesTransform.getLineLength(positions, flagDis) → Number|undefined

计算线的空间长度

Name Type Description
positions Array.<Cartesian3>

坐标点
flagDis Boolean

是否计算长度
Returns:

计算的距离值，如果传入的坐标不是数组返回undefined

static GisEye.CoordinatesTransform.getMinDistanceToLine(positions, point) → Object

获取点到线的最短距离，返回的结果始终是在线上

Name Type Description
positions Array.<Cartesian3>

线的坐标点
point Cartesina3

需要计算的坐标点
Returns:

{position,distance} 其中position是点到线的最短距离的点，distance是距离

static GisEye.CoordinatesTransform.getPitch(pointA, pointB) → Number

获取两点的俯仰角

Name Type Description
pointA Cartesian3

点A
pointB Cartesian3

点B
Returns:

返回俯仰角，单位弧度制

static GisEye.CoordinatesTransform.rotationAndTranlationEntity(entity, angle, tranlation) → Entity

对entity进行旋转和平移,旋转只针对于方位角的旋转，平移是x、y、z三个方向的设值， 只针对于设置了position的entity生效，polygon、polyline这样的不会生效

Name Type Description
entity Entity

需要处理的entity
angle Number

旋转角度，这是一个增量值，不是定义值， 也就是说不是旋转到这个度数的角度，而是旋转这么多角度。单位度
tranlation Cartesian3

要平移的距离
Returns:

返回旋转屏以后的entity对象

Throws:

  • entity 未定义

  • 传入的entity参数不是Cesium.Entity类型的

Example:
GisEye.CoordinatesTransform.rotationAndTranlationEntity(entity,30,new Cesium.Cartesian3(10,0,10))

static GisEye.CoordinatesTransform.translate(position, offset, matrix4, result) → Cartesian3|undefined

指定偏移矩阵将点偏移

Name Type Default Description
position Cartesian3

需要偏移的原始点位
offset Cartesina3

偏移值
matrix4 Matrix4 Cesium.Transforms.eastNorthUpToFixedFrame(position) optional

原始矩阵4x4
result Cartesina3

返回值
Returns:

返回偏移后的笛卡尔坐标

Example:
GisEye.CoordinatesTransform.translate(Cesium.Cartesian3.fromDegrees(103,29,10),new Cesium.Cartesian3(10,0,100),undefined,new Cesium.Cartesian3())

static GisEye.CoordinatesTransform.windowPositionToCartesian3(inCartesian2, viewer, result) → Cartesian3|undefined

屏幕坐标转为笛卡尔坐标

Name Type Description
inCartesian2 Cartesian2

屏幕坐标
viewer Viewer

viewer对象
result Cartesian3

返回值
Returns:

返回转换后的笛卡尔坐标

static GisEye.CoordinatesTransform.windowPositionToCartographic(inCartesian2, viewer, result) → Cartographic|undefined

屏幕坐标转为弧度制的

Name Type Description
inCartesian2 Cartesian2

屏幕坐标
viewer Viewer

viewer对象
result Cartographic

返回值
Returns:

返回转换后的弧度制地理坐标

static GisEye.CoordinatesTransform.windowPositionToDegrees(inCartesian2, viewer, result) → object|undefined

将屏幕坐标转为经纬度值

Name Type Description
inCartesian2 Cartesian2

需要转换的屏幕坐标
viewer Viewer

viewer对象
result object

返回值
Returns:

返回转换后的经纬度坐标

cartesian3ToDegrees(inCartesian3, result) → Array|undefined

将笛卡尔坐标转为经纬度坐标

Name Type Description
inCartesian3 Cartesian3

需要转换的笛卡尔坐标
result Array

返回值例如：[102,23,100]
Returns:

返回转换后的经纬度坐标返回转换后的经纬度坐标例如：[102,23,100]

See:

cartesian3ToWindowPosition(inCartesian3, result) → Cartesian2|undefined

笛卡尔坐标转为屏幕坐标

Name Type Description
inCartesian3 Cartesian3

需要转换的笛卡尔坐标
result Cartesian2

返回的屏幕坐标
Returns:

返回转换后的屏幕坐标

See:

windowPositionToCartesian3(inCartesian2, result) → Cartesian3|undefined

屏幕坐标转为笛卡尔坐标

Name Type Description
inCartesian2 Cartesian2

屏幕坐标
result Cartesian3

返回值
Returns:

返回转换后的笛卡尔坐标

See:

windowPositionToCartographic(inCartesian2, result) → Cartographic|undefined

屏幕坐标转为弧度制的

Name Type Description
inCartesian2 Cartesian2

屏幕坐标
result Cartographic

返回值
Returns:

返回转换后的弧度制地理坐标

See:

windowPositionToDegrees(inCartesian2, result) → object|undefined

将屏幕坐标转为经纬度值

Name Type Description
inCartesian2 Cartesian2

需要转换的屏幕坐标
result object

返回值
Returns:

返回转换后的经纬度坐标

See: