Camera

Members

staticCesium.Camera.DEFAULT_OFFSET : HeadingPitchRange

The default heading/pitch/range that is used when the camera flies to a location that contains a bounding sphere.

staticCesium.Camera.DEFAULT_VIEW_FACTOR : Number

A scalar to multiply to the camera position and add it back after setting the camera to view the rectangle. A value of zero means the camera will view the entire Camera#DEFAULT_VIEW_RECTANGLE, a value greater than zero will move it further away from the extent, and a value less than zero will move it close to the extent.

staticCesium.Camera.DEFAULT_VIEW_RECTANGLE : Rectangle

The default rectangle the camera will view on creation.

readonlychanged : Event

Gets the event that will be raised when the camera has changed by percentageChanged.

constrainedAxis : Cartesian3

If set, the camera will not be able to rotate past this axis in either direction.

Default Value: undefined

defaultLookAmount : Number

The default amount to rotate the camera when an argument is not provided to the look methods.

Default Value: Math.PI / 60.0

defaultMoveAmount : Number

The default amount to move the camera when an argument is not provided to the move methods.

Default Value: 100000.0;

defaultRotateAmount : Number

The default amount to rotate the camera when an argument is not provided to the rotate methods.

Default Value: Math.PI / 3600.0

defaultZoomAmount : Number

The default amount to move the camera when an argument is not provided to the zoom methods.

Default Value: 100000.0;

direction : Cartesian3

相机视图方向。

readonlydirectionWC : Cartesian3

Gets the view direction of the camera in world coordinates.

flyCircleLoop : Boolean

设置相机绕点旋转是否开启循环模式。

Example:

var scene = viewer.scene;
var camera = scene.camera;
//设置相机循环模式
camera.flyCircleLoop = true;

flyClampToGround : Boolean

设置是否贴地飞行，默认为flase,设置为true时始终在地形在地形之上飞行，不会钻进地形内部。

frustum : Frustum

视野中的空间区域，即视锥体。

Default Value: PerspectiveFrustum()

See:

• PerspectiveFrustum
• PerspectiveOffCenterFrustum
• OrthographicFrustum

readonlyheading : Number

获取相机方位角，单位为弧度。

readonlyinverseTransform : Matrix4

Gets the inverse camera transform.

Default Value: Matrix4.IDENTITY

readonlyinverseViewMatrix : Matrix4

Gets the inverse view matrix.

See:

• Camera#viewMatrix

maximumZoomFactor : Number

The factor multiplied by the the map size used to determine where to clamp the camera position when zooming out from the surface. The default is 1.5. Only valid for 2D and the map is rotatable.

Default Value: 1.5

readonlymoveEnd : Event

Gets the event that will be raised when the camera has stopped moving.

readonlymoveStart : Event

Gets the event that will be raised at when the camera starts to move.

percentageChanged : number

The amount the camera has to change before the changed event is raised. The value is a percentage in the [0, 1] range.

Default Value: 0.5

readonlypitch : Number

获取相机的俯仰角，单位为弧度。

position : Cartesian3

相机对象的位置。

readonlypositionCartographic : Cartographic

Gets the Cartographic position of the camera, with longitude and latitude expressed in radians and height in meters. In 2D and Columbus View, it is possible for the returned longitude and latitude to be outside the range of valid longitudes and latitudes when the camera is outside the map.

readonlypositionWC : Cartesian3

Gets the position of the camera in world coordinates.

right : Cartesian3

相机的正确方向。

readonlyrightWC : Cartesian3

Gets the right direction of the camera in world coordinates.

readonlyroll : Number

获取相机旋转角度，单位为弧度。

sensitivePositionRatio : Number

获取或设置地形敏感点比例，范围为0-1之间。

speedRatio : Number

设置绕点旋转速率。

readonlytransform : Matrix4

Gets the camera's reference frame. The inverse of this transformation is appended to the view matrix.

Default Value: Matrix4.IDENTITY

up : Cartesian3

相机的上方向。

readonlyupWC : Cartesian3

Gets the up direction of the camera in world coordinates.

readonlyviewMatrix : Matrix4

Gets the view matrix.

See:

• Camera#inverseViewMatrix

Methods

cameraToWorldCoordinates(cartesian, result) → Cartesian4

Transform a vector or point from the camera's reference frame to world coordinates.

Name	Type	Description
cartesian	Cartesian4	The vector or point to transform.
result	Cartesian4	optional The object onto which to store the result.

Returns:

The transformed vector or point.

cameraToWorldCoordinatesPoint(cartesian, result) → Cartesian3

Transform a point from the camera's reference frame to world coordinates.

Name	Type	Description
cartesian	Cartesian3	The point to transform.
result	Cartesian3	optional The object onto which to store the result.

Returns:

The transformed point.

cameraToWorldCoordinatesVector(cartesian, result) → Cartesian3

Transform a vector from the camera's reference frame to world coordinates.

Name	Type	Description
cartesian	Cartesian3	The vector to transform.
result	Cartesian3	optional The object onto which to store the result.

Returns:

The transformed vector.

cancelFlight()

Cancels the current camera flight if one is in progress. The camera is left at it's current location.

computeViewRectangle(ellipsoid, result) → Rectangle|undefined

Computes the approximate visible rectangle on the ellipsoid.

Name	Type	Default	Description
ellipsoid	Ellipsoid	Ellipsoid.WGS84	optional The ellipsoid that you want to know the visible region.
result	Rectangle		optional The rectangle in which to store the result

Returns:

The visible rectangle or undefined if the ellipsoid isn't visible at all.

disableReflection()

Disables reflection modification previously turned on with enableReflection.

distanceToBoundingSphere(boundingSphere) → Number

Return the distance from the camera to the front of the bounding sphere.

Name	Type	Description
boundingSphere	BoundingSphere	The bounding sphere in world coordinates.

Returns:

The distance to the bounding sphere.

enableReflection(plane)

Modifies this frustum so it always renders from the reflection of itself through the plane specified.

Name	Type	Description
plane	Plane	optional the reflection of plane

flyCircle(center)

相机绕中心点旋转。

Name	Type	Description
center	Number	在场景中所绘制点的三维空间坐标值。

Example:

var scene = viewer.scene;
var camera = scene.camera;
var handlerPoint = new Cesium.DrawHandler(viewer,Cesium.DrawMode.Point);
    handlerPoint.drawEvt.addEventListener(function(result){
    center = result.object.position;
//相机绕中心点旋转。
    camera.flyCircle(center);
    });

flyHome(duration)

Fly the camera to the home view. Use Camera#.DEFAULT_VIEW_RECTANGLE to set the default view for the 3D scene. The home view for 2D and columbus view shows the entire map.

Name	Type	Description
duration	Number	optional The duration of the flight in seconds. If omitted, Cesium attempts to calculate an ideal duration based on the distance to be traveled by the flight. See Camera#flyTo

flyTo(options)

相机从当前位置飞行到新的空间位置。

Name	Type	Description
options	Object	对象具有以下属性: Name Type Description destination Cartesian3 | Rectangle 相机在WGS84世界坐标系中的最终位置，或是自顶向下视图中可见的矩形区域。 orientation Object optional 包含了方位(direction)、上方向(up)以及方位角(heading)、俯仰角(pitch)、滚动角(roll)属性的对象。默认情况下，3D中方位(direction)指向框架中心，在Columbus视图中指向负z方向。 在3D中上方向(up)指向本地北方向，而在Columbus视图中指向正y方向。在无限滚动模式下，二维视图不使用方向(orientation)。 duration Number optional 飞行持续时间（以秒为单位）。如果省略，由飞行距离计算合理的持续时间。 complete Camera~FlightCompleteCallback optional 飞行完成时执行的功能。 cancel Camera~FlightCancelledCallback optional 飞行取消时执行的功能。 endTransform Matrix4 optional 飞行完成时相机将处于的参考系的变换矩阵。 maximumHeight Number optional 飞行中的最大高度。 easingFunction EasingFunction | EasingFunction~Callback optional 释放时调用功能。 pitchAdjustHeight Number optional If camera flyes higher than that value, adjust pitch duiring the flight to look down, and keep Earth in viewport. flyOverLongitude Number optional There are always two ways between 2 points on globe. This option force camera to choose fight direction to fly over that longitude. flyOverLongitudeWeight Number optional Fly over the lon specifyed via flyOverLongitude only if that way is not longer than short way times flyOverLongitudeWeight.

Throws:

• DeveloperError : 若提供了方向(direction )、上方向(up)两者之一，则两者都需要提供。

Example:

// 1. 飞向通过top-down视图表示的位置
viewer.camera.flyTo({
    destination : Cesium.Cartesian3.fromDegrees(-117.16, 32.71, 15000.0)
});

// 2. 飞向通过top-down视图表示的矩形
viewer.camera.flyTo({
    destination : Cesium.Rectangle.fromDegrees(west, south, east, north)
});

// 3. 飞向利用单位向量表示方向(orientatin)的位置
viewer.camera.flyTo({
    destination : Cesium.Cartesian3.fromDegrees(-122.19, 46.25, 5000.0),
    orientation : {
        direction : new Cesium.Cartesian3(-0.04231243104240401, -0.20123236049443421, -0.97862924300734),
        up : new Cesium.Cartesian3(-0.47934589305293746, -0.8553216253114552, 0.1966022179118339)
    }
});

// 4. 飞向利用方位角(heading)、俯仰角(pitch)、滚动角(roll)表示方向(orientatin)的位置
viewer.camera.flyTo({
    destination : Cesium.Cartesian3.fromDegrees(-122.19, 46.25, 5000.0),
    orientation : {
        heading : Cesium.Math.toRadians(175.0),
        pitch : Cesium.Math.toRadians(-35.0),
        roll : 0.0
    }
});

flyToBoundingSphere(boundingSphere, options)

Flies the camera to a location where the current view contains the provided bounding sphere.

The offset is heading/pitch/range in the local east-north-up reference frame centered at the center of the bounding sphere. The heading and the pitch angles are defined in the local east-north-up reference frame. The heading is the angle from y axis and increasing towards the x axis. Pitch is the rotation from the xy-plane. Positive pitch angles are below the plane. Negative pitch angles are above the plane. The range is the distance from the center. If the range is zero, a range will be computed such that the whole bounding sphere is visible.

In 2D and Columbus View, there must be a top down view. The camera will be placed above the target looking down. The height above the target will be the range. The heading will be aligned to local north.

Name	Type	Description
boundingSphere	BoundingSphere	The bounding sphere to view, in world coordinates.
options	Object	optional Object with the following properties: Name Type Description duration Number optional The duration of the flight in seconds. If omitted, Cesium attempts to calculate an ideal duration based on the distance to be traveled by the flight. offset HeadingPitchRange optional The offset from the target in the local east-north-up reference frame centered at the target. complete Camera~FlightCompleteCallback optional The function to execute when the flight is complete. cancel Camera~FlightCancelledCallback optional The function to execute if the flight is cancelled. endTransform Matrix4 optional Transform matrix representing the reference frame the camera will be in when the flight is completed. maximumHeight Number optional The maximum height at the peak of the flight. pitchAdjustHeight Number optional If camera flyes higher than that value, adjust pitch duiring the flight to look down, and keep Earth in viewport. flyOverLongitude Number optional There are always two ways between 2 points on globe. This option force camera to choose fight direction to fly over that longitude. flyOverLongitudeWeight Number optional Fly over the lon specifyed via flyOverLongitude only if that way is not longer than short way times flyOverLongitudeWeight. easingFunction EasingFunction | EasingFunction~Callback optional Controls how the time is interpolated over the duration of the flight.

getMagnitude() → Number

Gets the magnitude of the camera position. In 3D, this is the vector magnitude. In 2D and Columbus view, this is the distance to the map.

Returns:

The magnitude of the position.

getPickRay(windowPosition, result) → Ray

Create a ray from the camera position through the pixel at windowPosition in world coordinates.

Name	Type	Description
windowPosition	Cartesian2	The x and y coordinates of a pixel.
result	Ray	optional The object onto which to store the result.

Returns:

Returns the Cartesian3 position and direction of the ray.

getPixelSize(boundingSphere, drawingBufferWidth, drawingBufferHeight) → Number

Return the pixel size in meters.

Name	Type	Description
boundingSphere	BoundingSphere	The bounding sphere in world coordinates.
drawingBufferWidth	Number	The drawing buffer width.
drawingBufferHeight	Number	The drawing buffer height.

Returns:

The pixel size in meters.

getRectangleCameraCoordinates(rectangle, result) → Cartesian3

Get the camera position needed to view a rectangle on an ellipsoid or map

Name	Type	Description
rectangle	Rectangle	The rectangle to view.
result	Cartesian3	optional The camera position needed to view the rectangle

Returns:

The camera position needed to view the rectangle

look(axis, angle)

Rotate each of the camera's orientation vectors around axis by angle

Name	Type	Description
axis	Cartesian3	The axis to rotate around.
angle	Number	optional The angle, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#lookUp
• Camera#lookDown
• Camera#lookLeft
• Camera#lookRight

lookAt(target, offset)

通过目标(target)和偏移(offset)设置相机位置、方向。 目标(target)以世界坐标方式表示；偏移(offset)是在以目标为中心的本地“东-北-上”参考系中的笛卡尔坐标或“方位角/俯仰角/范围（heading/pitch/range）”。 如果偏移(offset)由笛卡尔坐标表示，它表示距离由变换矩阵定义的参考系中心的偏移量。 如果偏移(offset)由“heading/pitch/range”表示，方位角(heading)和俯仰角(pitch)的角度由根据变换矩阵定义的参考系确定，方位角(heading)从y轴开始朝向x轴增加，俯仰角(pitch)为从xy平面的旋转角度，正的俯仰角位于平面下方，负的俯仰角位于平面上方。 范围(range)为距中心点的距离。在2D中必须为自上而下视图，相机位于俯视目标的上方，目标上方的高度值是偏移量的大小。方位角根据偏移确定，如果不能从偏移确定方位角，则方位角为北方向。

Name	Type	Description
target	Cartesian3	目标在世界坐标中的空间位置。
offset	Cartesian3 | HeadingPitchRange	距以目标为中心的本地“东-北-上”参考系的偏移。

Throws:

• DeveloperError : 变形时不支持lookAt方法。

Example:

// 1. 利用笛卡尔坐标设置偏移
var center = Cesium.Cartesian3.fromDegrees(-98.0, 40.0);
viewer.camera.lookAt(center, new Cesium.Cartesian3(0.0, -4790000.0, 3930000.0));

// 2. 利用HeadingPitchRange设置偏移
var center = Cesium.Cartesian3.fromDegrees(-72.0, 40.0);
var heading = Cesium.Math.toRadians(50.0);
var pitch = Cesium.Math.toRadians(-20.0);
var range = 5000.0;
viewer.camera.lookAt(center, new Cesium.HeadingPitchRange(heading, pitch, range));

lookAtTransform(transform, offset)

Sets the camera position and orientation using a target and transformation matrix. The offset can be either a cartesian or heading/pitch/range. If the offset is a cartesian, then it is an offset from the center of the reference frame defined by the transformation matrix. If the offset is heading/pitch/range, then the heading and the pitch angles are defined in the reference frame defined by the transformation matrix. The heading is the angle from y axis and increasing towards the x axis. Pitch is the rotation from the xy-plane. Positive pitch angles are below the plane. Negative pitch angles are above the plane. The range is the distance from the center. In 2D, there must be a top down view. The camera will be placed above the center of the reference frame. The height above the target will be the magnitude of the offset. The heading will be determined from the offset. If the heading cannot be determined from the offset, the heading will be north.

Name	Type	Description
transform	Matrix4	The transformation matrix defining the reference frame.
offset	Cartesian3 | HeadingPitchRange	optional The offset from the target in a reference frame centered at the target.

Throws:

• DeveloperError : lookAtTransform is not supported while morphing.

Example:

// 1. Using a cartesian offset
var transform = Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(-98.0, 40.0));
viewer.camera.lookAtTransform(transform, new Cesium.Cartesian3(0.0, -4790000.0, 3930000.0));

// 2. Using a HeadingPitchRange offset
var transform = Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(-72.0, 40.0));
var heading = Cesium.Math.toRadians(50.0);
var pitch = Cesium.Math.toRadians(-20.0);
var range = 5000.0;
viewer.camera.lookAtTransform(transform, new Cesium.HeadingPitchRange(heading, pitch, range));

lookDown(amount)

Rotates the camera around its right vector by amount, in radians, in the opposite direction of its up vector.

Name	Type	Description
amount	Number	optional The amount, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#lookUp

lookLeft(amount)

Rotates the camera around its up vector by amount, in radians, in the opposite direction of its right vector.

Name	Type	Description
amount	Number	optional The amount, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#lookRight

lookRight(amount)

Rotates the camera around its up vector by amount, in radians, in the direction of its right vector.

Name	Type	Description
amount	Number	optional The amount, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#lookLeft

lookUp(amount)

Rotates the camera around its right vector by amount, in radians, in the direction of its up vector.

Name	Type	Description
amount	Number	optional The amount, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#lookDown

move(direction, amount)

Translates the camera's position by amount along direction.

Name	Type	Description
direction	Cartesian3	The direction to move.
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveBackward
• Camera#moveForward
• Camera#moveLeft
• Camera#moveRight
• Camera#moveUp
• Camera#moveDown

moveBackward(amount)

Translates the camera's position by amount along the opposite direction of the camera's view vector.

Name	Type	Description
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveForward

moveDown(amount)

Translates the camera's position by amount along the opposite direction of the camera's up vector.

Name	Type	Description
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveUp

moveForward(amount)

Translates the camera's position by amount along the camera's view vector.

Name	Type	Description
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveBackward

moveLeft(amount)

Translates the camera's position by amount along the opposite direction of the camera's right vector.

Name	Type	Description
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveRight

moveRight(amount)

Translates the camera's position by amount along the camera's right vector.

Name	Type	Description
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveLeft

moveUp(amount)

Translates the camera's position by amount along the camera's up vector.

Name	Type	Description
amount	Number	optional The amount, in meters, to move. Defaults to defaultMoveAmount.

See:

• Camera#moveDown

pickEllipsoid(windowPosition, ellipsoid, result) → Cartesian3

Pick an ellipsoid or map.

Name	Type	Default	Description
windowPosition	Cartesian2		The x and y coordinates of a pixel.
ellipsoid	Ellipsoid	Ellipsoid.WGS84	optional The ellipsoid to pick.
result	Cartesian3		optional The object onto which to store the result.

Returns:

If the ellipsoid or map was picked, returns the point on the surface of the ellipsoid or map in world coordinates. If the ellipsoid or map was not picked, returns undefined.

rotate(axis, angle)

Rotates the camera around axis by angle. The distance of the camera's position to the center of the camera's reference frame remains the same.

Name	Type	Description
axis	Cartesian3	The axis to rotate around given in world coordinates.
angle	Number	optional The angle, in radians, to rotate by. Defaults to defaultRotateAmount.

See:

• Camera#rotateUp
• Camera#rotateDown
• Camera#rotateLeft
• Camera#rotateRight

rotateDown(angle)

Rotates the camera around the center of the camera's reference frame by angle downwards.

Name	Type	Description
angle	Number	optional The angle, in radians, to rotate by. Defaults to defaultRotateAmount.

See:

• Camera#rotateUp
• Camera#rotate

rotateLeft(angle)

Rotates the camera around the center of the camera's reference frame by angle to the left.

Name	Type	Description
angle	Number	optional The angle, in radians, to rotate by. Defaults to defaultRotateAmount.

See:

• Camera#rotateRight
• Camera#rotate

rotateRight(angle)

Rotates the camera around the center of the camera's reference frame by angle to the right.

Name	Type	Description
angle	Number	optional The angle, in radians, to rotate by. Defaults to defaultRotateAmount.

See:

• Camera#rotateLeft
• Camera#rotate

rotateUp(angle)

Rotates the camera around the center of the camera's reference frame by angle upwards.

Name	Type	Description
angle	Number	optional The angle, in radians, to rotate by. Defaults to defaultRotateAmount.

See:

• Camera#rotateDown
• Camera#rotate

setView(options)

设置相机位置、方向和变换。

Name	Type	Description
options	Object	对象具有以下属性: Name Type Description destination Cartesian3 | Rectangle optional 相机在WGS84世界坐标系中的最终位置，或是自顶向下视图中可见的矩形区域。 orientation Object optional 包含了方位(direction)、上方向(up)以及方位角(heading)、俯仰角(pitch)、滚动角(roll)属性的对象。 默认情况下，3D中方位(direction)指向框架中心，在Columbus视图中指向负z方向。 在3D中上方向(up)指向本地北方向，而在Columbus视图中指向正y方向。在无限滚动模式下，二维视图不使用方向(orientation)。 endTransform Matrix4 optional 表示相机参考坐标系的变换矩阵。 convert Boolean optional 是否将相机最终位置从世界坐标转换为场景坐标，默认值True。

Example:

// 1. 通过top-down视图设置位置。
viewer.camera.setView({
    destination : Cesium.Cartesian3.fromDegrees(-117.16, 32.71, 15000.0)
});

// 2 通过方位角、俯仰角、滚动角设置视图。
viewer.camera.setView({
    destination : cartesianPosition,
    orientation: {
        heading : Cesium.Math.toRadians(90.0), // east, default value is 0.0 (north)
        pitch : Cesium.Math.toRadians(-90),    // default value (looking down)
        roll : 0.0                             // default value
    }
});

// 3. 相机空间位置不变，改变方位角、俯仰角和滚动角。.
viewer.camera.setView({
    orientation: {
        heading : Cesium.Math.toRadians(90.0), // east, default value is 0.0 (north)
        pitch : Cesium.Math.toRadians(-90),    // default value (looking down)
        roll : 0.0                             // default value
    }
});


// 4. 通过自顶向下视图查看矩形。
viewer.camera.setView({
    destination : Cesium.Rectangle.fromDegrees(west, south, east, north)
});

// 5. 通过使用单位向量的方向(orientation)设置相机位置。
viewer.camera.setView({
    destination : Cesium.Cartesian3.fromDegrees(-122.19, 46.25, 5000.0),
    orientation : {
        direction : new Cesium.Cartesian3(-0.04231243104240401, -0.20123236049443421, -0.97862924300734),
        up : new Cesium.Cartesian3(-0.47934589305293746, -0.8553216253114552, 0.1966022179118339)
    }
});

stopFlyCircle()

停止相机绕中心点旋转。

switchToOrthographicFrustum()

Switches the frustum/projection to orthographic. This function is a no-op in 2D which will always be orthographic.

switchToPerspectiveFrustum()

Switches the frustum/projection to perspective. This function is a no-op in 2D which must always be orthographic.

twistLeft(amount)

Rotate the camera counter-clockwise around its direction vector by amount, in radians.

Name	Type	Description
amount	Number	optional The amount, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#twistRight

twistRight(amount)

Rotate the camera clockwise around its direction vector by amount, in radians.

Name	Type	Description
amount	Number	optional The amount, in radians, to rotate by. Defaults to defaultLookAmount.

See:

• Camera#twistLeft

viewBoundingSphere(boundingSphere, offset)

Sets the camera so that the current view contains the provided bounding sphere.

The offset is heading/pitch/range in the local east-north-up reference frame centered at the center of the bounding sphere. The heading and the pitch angles are defined in the local east-north-up reference frame. The heading is the angle from y axis and increasing towards the x axis. Pitch is the rotation from the xy-plane. Positive pitch angles are below the plane. Negative pitch angles are above the plane. The range is the distance from the center. If the range is zero, a range will be computed such that the whole bounding sphere is visible.

In 2D, there must be a top down view. The camera will be placed above the target looking down. The height above the target will be the range. The heading will be determined from the offset. If the heading cannot be determined from the offset, the heading will be north.

Name	Type	Description
boundingSphere	BoundingSphere	The bounding sphere to view, in world coordinates.
offset	HeadingPitchRange	optional The offset from the target in the local east-north-up reference frame centered at the target.

Throws:

• DeveloperError : viewBoundingSphere is not supported while morphing.

worldToCameraCoordinates(cartesian, result) → Cartesian4

Transform a vector or point from world coordinates to the camera's reference frame.

Name	Type	Description
cartesian	Cartesian4	The vector or point to transform.
result	Cartesian4	optional The object onto which to store the result.

Returns:

The transformed vector or point.

worldToCameraCoordinatesPoint(cartesian, result) → Cartesian3

Transform a point from world coordinates to the camera's reference frame.

Name	Type	Description
cartesian	Cartesian3	The point to transform.
result	Cartesian3	optional The object onto which to store the result.

Returns:

The transformed point.

worldToCameraCoordinatesVector(cartesian, result) → Cartesian3

Transform a vector from world coordinates to the camera's reference frame.

Name	Type	Description
cartesian	Cartesian3	The vector to transform.
result	Cartesian3	optional The object onto which to store the result.

Returns:

The transformed vector.

zoomIn(amount)

Zooms amount along the camera's view vector.

Name	Type	Description
amount	Number	optional The amount to move. Defaults to defaultZoomAmount.

See:

• Camera#zoomOut

zoomOut(amount)

Zooms amount along the opposite direction of the camera's view vector.

Name	Type	Description
amount	Number	optional The amount to move. Defaults to defaultZoomAmount.

See:

• Camera#zoomIn

Type Definitions

FlightCancelledCallback()

A function that will execute when a flight is cancelled.

FlightCompleteCallback()

A function that will execute when a flight completes.