class QCamera

The QCamera class defines a view point through which the scene will be rendered. More…

Synopsis

Properties

• aspectRatioᅟ

• bottomᅟ

• exposureᅟ

• farPlaneᅟ

• fieldOfViewᅟ

• leftᅟ

• lensᅟ

• nearPlaneᅟ

• positionᅟ

• projectionMatrixᅟ

• projectionTypeᅟ

• rightᅟ

• topᅟ

• transformᅟ

• upVectorᅟ

• viewCenterᅟ

• viewMatrixᅟ

• viewVectorᅟ

Methods

• def __init__()

• def aspectRatio()

• def bottom()

• def exposure()

• def farPlane()

• def fieldOfView()

• def left()

• def lens()

• def nearPlane()

• def pan()

• def panAboutViewCenter()

• def panRotation()

• def position()

• def projectionMatrix()

• def projectionType()

• def right()

• def roll()

• def rollAboutViewCenter()

• def rollRotation()

• def rotate()

• def rotateAboutViewCenter()

• def rotation()

• def tilt()

• def tiltAboutViewCenter()

• def tiltRotation()

• def top()

• def transform()

• def translate()

• def translateWorld()

• def upVector()

• def viewCenter()

• def viewMatrix()

• def viewVector()

Slots

• def setAspectRatio()

• def setBottom()

• def setExposure()

• def setFarPlane()

• def setFieldOfView()

• def setLeft()

• def setNearPlane()

• def setPosition()

• def setProjectionMatrix()

• def setProjectionType()

• def setRight()

• def setTop()

• def setUpVector()

• def setViewCenter()

• def viewAll()

• def viewEntity()

• def viewSphere()

Signals

• def aspectRatioChanged()

• def bottomChanged()

• def exposureChanged()

• def farPlaneChanged()

• def fieldOfViewChanged()

• def leftChanged()

• def nearPlaneChanged()

• def positionChanged()

• def projectionMatrixChanged()

• def projectionTypeChanged()

• def rightChanged()

• def topChanged()

• def upVectorChanged()

• def viewCenterChanged()

• def viewMatrixChanged()

• def viewVectorChanged()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description

class CameraTranslationOption

This enum specifies how camera view center is translated

Constant	Description
Qt3DRender.QCamera.TranslateViewCenter	Translate the view center causing the view direction to remain the same
Qt3DRender.QCamera.DontTranslateViewCenter	Don’t translate the view center causing the view direction to change

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property aspectRatioᅟ: float

Holds the current aspect ratio.

Access functions:

• aspectRatio()

• setAspectRatio()

• Signal aspectRatioChanged()

property bottomᅟ: float

Holds the current bottom of the camera.

This property is only relevant when projectionType is OrthographicProjection .

Access functions:

• bottom()

• setBottom()

• Signal bottomChanged()

property exposureᅟ: float

Holds the current exposure of the camera.

The default value is 0.0.

The MetalRoughMaterial in Qt 3D Extras is currently the only provided material that makes use of camera exposure. Negative values will cause the material to be darker, and positive values will cause it to be lighter.

Custom materials may choose to interpret the value differently.

Access functions:

• exposure()

• setExposure()

• Signal exposureChanged()

property farPlaneᅟ: float

Holds the current camera far plane. Objects that are farther from the camera than the farPlane will not be rendered.

Access functions:

• farPlane()

• setFarPlane()

• Signal farPlaneChanged()

property fieldOfViewᅟ: float

Holds the current vertical field of view in degrees.

Along with aspectRatio , this property determines how much of the scene is visible to the camera. In that respect you might think of it as analogous to choosing a wide angle (wide horizontal field of view) or telephoto (narrow horizontal field of view) lens depending on how much of a scene you want to capture.

fieldOfView is only relevant when projectionType is PerspectiveProjection .

Access functions:

• fieldOfView()

• setFieldOfView()

• Signal fieldOfViewChanged()

property leftᅟ: float

Holds the current left of the camera.

This property is only relevant when projectionType is OrthographicProjection .

Access functions:

• left()

• setLeft()

• Signal leftChanged()

property lensᅟ: QCameraLens

Holds the QCameraLens component of the camera.

Access functions:

• lens()

property nearPlaneᅟ: float

Holds the current camera near plane. Objects that are closer to the camera than the nearPlane will not be rendered.

Access functions:

• nearPlane()

• setNearPlane()

• Signal nearPlaneChanged()

property positionᅟ: QVector3D

Holds the camera’s position in coordinates relative to the parent entity.

Access functions:

• position()

• setPosition()

• Signal positionChanged()

property projectionMatrixᅟ: QMatrix4x4

Holds the current projection matrix of the camera.

Access functions:

• projectionMatrix()

• setProjectionMatrix()

• Signal projectionMatrixChanged()

property projectionTypeᅟ: Qt3DRender.QCameraLens.ProjectionType

Holds the type of the camera projection. The default value is PerspectiveProjection .

• OrthographicProjection - Parallel lines appear parallel. Objects appear the same size regardless of distance.

• PerspectiveProjection - Parallel lines appear to meet in the distance. Objects appear to shrink the farther they are from the camera.

• FrustumProjection

• CustomProjection

See also

ProjectionType

Access functions:

• projectionType()

• setProjectionType()

• Signal projectionTypeChanged()

property rightᅟ: float

Holds the current right of the camera.

This property is only relevant when projectionType is OrthographicProjection .

Access functions:

• right()

• setRight()

• Signal rightChanged()

property topᅟ: float

Holds the current top of the camera.

This property is only relevant when projectionType is OrthographicProjection .

Access functions:

• top()

• setTop()

• Signal topChanged()

property transformᅟ: QTransform

Holds the QTransform component of the camera.

Access functions:

• transform()

property upVectorᅟ: QVector3D

Holds the camera’s up vector in coordinates relative to the parent entity.

The up vector indicates which direction the top of the camera is facing. Think of taking a picture: after positioning yourself and pointing the camera at your target, you might rotate the camera left or right, giving you a portrait or landscape (or angled!) shot. upVector allows you to control this type of movement.

Access functions:

• upVector()

• setUpVector()

• Signal upVectorChanged()

property viewCenterᅟ: QVector3D

Holds the camera’s view center in coordinates relative to the parent entity.

Intuitively, the viewCenter is the location the camera is pointing at.

Access functions:

• viewCenter()

• setViewCenter()

• Signal viewCenterChanged()

property viewMatrixᅟ: QMatrix4x4

Holds the camera’s view matrix in coordinates relative to the parent entity.

Access functions:

• viewMatrix()

• Signal viewMatrixChanged()

property viewVectorᅟ: QVector3D

Holds the camera’s view vector in coordinates relative to the parent entity.

This vector decribes the displacement from the camera ( position ) to its target ( viewCenter ).

Access functions:

• viewVector()

• Signal viewVectorChanged()

__init__([parent=None])

Parameters:

parent – QNode

Creates a new QCamera instance with the specified parent.

aspectRatio()

Return type:

float

See also

setAspectRatio()

Getter of property aspectRatioᅟ .

aspectRatioChanged(aspectRatio)

Parameters:

aspectRatio – float

Notification signal of property aspectRatioᅟ .

bottom()

Return type:

float

See also

setBottom()

Getter of property bottomᅟ .

bottomChanged(bottom)

Parameters:

bottom – float

Notification signal of property bottomᅟ .

exposure()

Return type:

float

See also

setExposure()

Getter of property exposureᅟ .

exposureChanged(exposure)

Parameters:

exposure – float

Notification signal of property exposureᅟ .

farPlane()

Return type:

float

See also

setFarPlane()

Getter of property farPlaneᅟ .

farPlaneChanged(farPlane)

Parameters:

farPlane – float

Notification signal of property farPlaneᅟ .

fieldOfView()

Return type:

float

See also

setFieldOfView()

Getter of property fieldOfViewᅟ .

fieldOfViewChanged(fieldOfView)

Parameters:

fieldOfView – float

Notification signal of property fieldOfViewᅟ .

left()

Return type:

float

See also

setLeft()

Getter of property leftᅟ .

leftChanged(left)

Parameters:

left – float

Notification signal of property leftᅟ .

lens()

Return type:

QCameraLens

Returns the current lens.

Getter of property lensᅟ .

nearPlane()

Return type:

float

See also

setNearPlane()

Getter of property nearPlaneᅟ .

nearPlaneChanged(nearPlane)

Parameters:

nearPlane – float

Notification signal of property nearPlaneᅟ .

pan(angle)

Parameters:

angle – float

Adjusts the pan angle of the camera by angle in degrees.

pan(angle, axis)

Parameters:

• angle – float

• axis – QVector3D

Adjusts the pan angle of the camera by angle in degrees on a chosen axis.

panAboutViewCenter(angle)

Parameters:

angle – float

Adjusts the camera pan about view center by angle in degrees.

panAboutViewCenter(angle, axis)

Parameters:

• angle – float

• axis – QVector3D

Adjusts the camera pan about view center by angle in degrees on axis.

panRotation(angle)

Parameters:

angle – float

Return type:

QQuaternion

Returns the calculated pan rotation in relation to the angle in degrees taken in to adjust the camera’s pan or left/right rotation on the Y axis.

position()

Return type:

QVector3D

See also

setPosition()

Getter of property positionᅟ .

positionChanged(position)

Parameters:

position – QVector3D

Notification signal of property positionᅟ .

projectionMatrix()

Return type:

QMatrix4x4

See also

setProjectionMatrix()

Getter of property projectionMatrixᅟ .

projectionMatrixChanged(projectionMatrix)

Parameters:

projectionMatrix – QMatrix4x4

Notification signal of property projectionMatrixᅟ .

projectionType()

Return type:

ProjectionType

See also

setProjectionType()

Getter of property projectionTypeᅟ .

projectionTypeChanged(projectionType)

Parameters:

projectionType – ProjectionType

Notification signal of property projectionTypeᅟ .

right()

Return type:

float

See also

setRight()

Getter of property rightᅟ .

rightChanged(right)

Parameters:

right – float

Notification signal of property rightᅟ .

roll(angle)

Parameters:

angle – float

Adjusts the camera roll by angle in degrees.

rollAboutViewCenter(angle)

Parameters:

angle – float

Adjusts the camera roll about view center by angle in degrees.

rollRotation(angle)

Parameters:

angle – float

Return type:

QQuaternion

Returns the calculated roll rotation in relation to the angle in degrees taken in to adjust the camera’s roll or lean left/right rotation on the Z axis.

rotate(q)

Parameters:

q – QQuaternion

Rotates the camera with the use of a Quaternion in q.

rotateAboutViewCenter(q)

Parameters:

q – QQuaternion

Rotates the camera about the view center with the use of a Quaternion in q.

rotation(angle, axis)

Parameters:

• angle – float

• axis – QVector3D

Return type:

QQuaternion

Returns the calculated rotation in relation to the angle in degrees and chosen axis taken in.

setAspectRatio(aspectRatio)

Parameters:

aspectRatio – float

Sets the camera’s aspect ratio to aspectRatio.

See also

aspectRatio()

Setter of property aspectRatioᅟ .

setBottom(bottom)

Parameters:

bottom – float

Sets the bottom of the camera to bottom.

See also

bottom()

Setter of property bottomᅟ .

setExposure(exposure)

Parameters:

exposure – float

Sets the camera’s exposure to exposure.

See also

exposure()

Setter of property exposureᅟ .

setFarPlane(farPlane)

Parameters:

farPlane – float

Sets the camera’s far plane to farPlane

See also

farPlane()

Setter of property farPlaneᅟ .

setFieldOfView(fieldOfView)

Parameters:

fieldOfView – float

Sets the camera’s field of view to fieldOfView in degrees.

See also

fieldOfView()

Setter of property fieldOfViewᅟ .

setLeft(left)

Parameters:

left – float

Sets the left of the camera to left.

See also

left()

Setter of property leftᅟ .

setNearPlane(nearPlane)

Parameters:

nearPlane – float

Sets the camera’s near plane to nearPlane.

See also

nearPlane()

Setter of property nearPlaneᅟ .

setPosition(position)

Parameters:

position – QVector3D

Sets the camera’s position in 3D space to position.

See also

position()

Setter of property positionᅟ .

setProjectionMatrix(projectionMatrix)

Parameters:

projectionMatrix – QMatrix4x4

Sets the camera’s projection matrix to projectionMatrix.

See also

projectionMatrix()

Setter of property projectionMatrixᅟ .

setProjectionType(type)

Parameters:

type – ProjectionType

Sets the camera’s projection type to type.

See also

projectionType()

Setter of property projectionTypeᅟ .

setRight(right)

Parameters:

right – float

Sets the right of the camera to right.

See also

right()

Setter of property rightᅟ .

setTop(top)

Parameters:

top – float

Sets the top of the camera to top.

See also

top()

Setter of property topᅟ .

setUpVector(upVector)

Parameters:

upVector – QVector3D

Sets the camera’s up vector to upVector.

See also

upVector()

Setter of property upVectorᅟ .

setViewCenter(viewCenter)

Parameters:

viewCenter – QVector3D

Sets the camera’s view center to viewCenter.

See also

viewCenter()

Setter of property viewCenterᅟ .

tilt(angle)

Parameters:

angle – float

Adjusts the tilt angle of the camera by angle in degrees.

tiltAboutViewCenter(angle)

Parameters:

angle – float

Adjusts the camera tilt about view center by angle in degrees.

tiltRotation(angle)

Parameters:

angle – float

Return type:

QQuaternion

Returns the calculated tilt rotation in relation to the angle in degrees taken in to adjust the camera’s tilt or up/down rotation on the X axis.

top()

Return type:

float

See also

setTop()

Getter of property topᅟ .

topChanged(top)

Parameters:

top – float

Notification signal of property topᅟ .

transform()

Return type:

QTransform

Returns the camera’s position via transform.

Getter of property transformᅟ .

translate(vLocal[, option=Qt3DRender.QCamera.CameraTranslationOption.TranslateViewCenter])

Parameters:

• vLocal – QVector3D

• option – CameraTranslationOption

Translates the camera’s position and its view vector by vLocal in local coordinates. The option allows for toggling whether the view center should be translated.

translateWorld(vWorld[, option=Qt3DRender.QCamera.CameraTranslationOption.TranslateViewCenter])

Parameters:

• vWorld – QVector3D

• option – CameraTranslationOption

Translates the camera’s position and its view vector by vWorld in world coordinates. The option allows for toggling whether the view center should be translated.

upVector()

Return type:

QVector3D

See also

setUpVector()

Getter of property upVectorᅟ .

upVectorChanged(upVector)

Parameters:

upVector – QVector3D

Notification signal of property upVectorᅟ .

viewAll()

Rotates and moves the camera so that it’s viewCenter is the center of the scene’s bounding volume and the entire scene fits in the view port.

Note

Only works if the lens is in perspective or orthographic projection mode.

See also

Qt3D.Render::Camera::projectionType

viewCenter()

Return type:

QVector3D

See also

setViewCenter()

Getter of property viewCenterᅟ .

viewCenterChanged(viewCenter)

Parameters:

viewCenter – QVector3D

Notification signal of property viewCenterᅟ .

viewEntity(entity)

Parameters:

entity – QEntity

Rotates and moves the camera so that it’s viewCenter is the center of the entity's bounding volume and the entire entity fits in the view port.

Note

Only works if the lens is in perspective or orthographic projection mode.

See also

Camera.projectionType

viewMatrix()

Return type:

QMatrix4x4

Getter of property viewMatrixᅟ .

viewMatrixChanged()

Notification signal of property viewMatrixᅟ .

viewSphere(center, radius)

Parameters:

• center – QVector3D

• radius – float

Rotates and moves the camera so that it’s viewCenter is center and a sphere of radius fits in the view port.

Note

Only works if the lens is in perspective or orthographic projection mode.

See also

Qt3D.Render::Camera::projectionType

viewVector()

Return type:

QVector3D

Getter of property viewVectorᅟ .

viewVectorChanged(viewVector)

Parameters:

viewVector – QVector3D

Notification signal of property viewVectorᅟ .