Q3DCamera Class

Representation of a camera in 3D space. More...

Header:	#include <Q3DCamera>
qmake:	QT += datavisualization
Since:	QtDataVisualization 1.0
Instantiated By:	Camera3D
Inherits:	Q3DObject

This class was introduced in QtDataVisualization 1.0.

List of all members, including inherited members

Public Types

enum	CameraPreset { CameraPresetNone, CameraPresetFrontLow, CameraPresetFront, CameraPresetFrontHigh, CameraPresetLeftLow, …, CameraPresetDirectlyBelow }

Properties

cameraPreset : CameraPreset
maxZoomLevel : float
minZoomLevel : float
target : QVector3D
wrapXRotation : bool

wrapYRotation : bool
xRotation : float
yRotation : float
zoomLevel : float

Public Functions

	Q3DCamera(QObject *parent = nullptr)
virtual	~Q3DCamera()
Q3DCamera::CameraPreset	cameraPreset() const
float	maxZoomLevel() const
float	minZoomLevel() const
void	setCameraPosition(float horizontal, float vertical, float zoom = 100.0f)
void	setCameraPreset(Q3DCamera::CameraPreset preset)
void	setMaxZoomLevel(float zoomLevel)
void	setMinZoomLevel(float zoomLevel)
void	setTarget(const QVector3D &target)
void	setWrapXRotation(bool isEnabled)
void	setWrapYRotation(bool isEnabled)
void	setXRotation(float rotation)
void	setYRotation(float rotation)
void	setZoomLevel(float zoomLevel)
QVector3D	target() const
bool	wrapXRotation() const
bool	wrapYRotation() const
float	xRotation() const
float	yRotation() const
float	zoomLevel() const

Reimplemented Public Functions

virtual void copyValuesFrom(const Q3DObject &source) override

Signals

void	cameraPresetChanged(Q3DCamera::CameraPreset preset)
void	maxZoomLevelChanged(float zoomLevel)
void	minZoomLevelChanged(float zoomLevel)
void	targetChanged(const QVector3D &target)
void	wrapXRotationChanged(bool isEnabled)
void	wrapYRotationChanged(bool isEnabled)
void	xRotationChanged(float rotation)
void	yRotationChanged(float rotation)
void	zoomLevelChanged(float zoomLevel)

Detailed Description

Q3DCamera represents a basic orbit around centerpoint 3D camera that is used when rendering the data visualization. The class offers simple methods for rotating the camera around the origin and setting zoom level.

Member Type Documentation

enum Q3DCamera::CameraPreset

Predefined positions for camera.

Constant	Value	Description
`Q3DCamera::CameraPresetNone`	`-1`	Used to indicate a preset has not been set, or the scene has been rotated freely.
`Q3DCamera::CameraPresetFrontLow`	`0`
`Q3DCamera::CameraPresetFront`	`1`
`Q3DCamera::CameraPresetFrontHigh`	`2`
`Q3DCamera::CameraPresetLeftLow`	`3`
`Q3DCamera::CameraPresetLeft`	`4`
`Q3DCamera::CameraPresetLeftHigh`	`5`
`Q3DCamera::CameraPresetRightLow`	`6`
`Q3DCamera::CameraPresetRight`	`7`
`Q3DCamera::CameraPresetRightHigh`	`8`
`Q3DCamera::CameraPresetBehindLow`	`9`
`Q3DCamera::CameraPresetBehind`	`10`
`Q3DCamera::CameraPresetBehindHigh`	`11`
`Q3DCamera::CameraPresetIsometricLeft`	`12`
`Q3DCamera::CameraPresetIsometricLeftHigh`	`13`
`Q3DCamera::CameraPresetIsometricRight`	`14`
`Q3DCamera::CameraPresetIsometricRightHigh`	`15`
`Q3DCamera::CameraPresetDirectlyAbove`	`16`
`Q3DCamera::CameraPresetDirectlyAboveCW45`	`17`
`Q3DCamera::CameraPresetDirectlyAboveCCW45`	`18`
`Q3DCamera::CameraPresetFrontBelow`	`19`	In Q3DBars from CameraPresetFrontBelow onward these only work for graphs including negative values. They act as Preset...Low for positive-only values.
`Q3DCamera::CameraPresetLeftBelow`	`20`
`Q3DCamera::CameraPresetRightBelow`	`21`
`Q3DCamera::CameraPresetBehindBelow`	`22`
`Q3DCamera::CameraPresetDirectlyBelow`	`23`	Acts as CameraPresetFrontLow for positive-only bars.

Property Documentation

cameraPreset : CameraPreset

This property holds the currently active camera preset.

If no CameraPreset value is set, CameraPresetNone is used by default.

Access functions:

Q3DCamera::CameraPreset	cameraPreset() const
void	setCameraPreset(Q3DCamera::CameraPreset preset)

Notifier signal:

void	cameraPresetChanged(Q3DCamera::CameraPreset preset)

maxZoomLevel : float

This property holds the maximum allowed camera zoom level.

If the maximum level is set to a new value that is lower than the existing minimum level, the minimum level is adjusted to the new maximum as well. If the current zoomLevel is outside the new bounds, it is adjusted as well. Defaults to 500.0f.

Access functions:

float	maxZoomLevel() const
void	setMaxZoomLevel(float zoomLevel)

Notifier signal:

void	maxZoomLevelChanged(float zoomLevel)

See also zoomLevel and minZoomLevel.

minZoomLevel : float

This property holds the minimum allowed camera zoom level.

If the minimum level is set to a new value that is higher than the existing maximum level, the maximum level is adjusted to the new minimum as well. If the current zoomLevel is outside the new bounds, it is adjusted as well. The minZoomLevel cannot be set below 1.0f. Defaults to 10.0f.

Access functions:

float	minZoomLevel() const
void	setMinZoomLevel(float zoomLevel)

Notifier signal:

void	minZoomLevelChanged(float zoomLevel)

See also zoomLevel and maxZoomLevel.

target : QVector3D

This property holds the camera target as a a vector or vertex in the 3D space.

Defaults to QVector3D(0.0, 0.0, 0.0).

Valid coordinate values are between -1.0...1.0, where the edge values indicate the edges of the corresponding axis range. Any values outside this range are clamped to the edge.

Note: For bar graphs, the Y-coordinate is ignored and camera always targets a point on the horizontal background.

This property was introduced in QtDataVisualization 1.2.

Access functions:

QVector3D	target() const
void	setTarget(const QVector3D &target)

Notifier signal:

void	targetChanged(const QVector3D &target)

wrapXRotation : bool

This property holds the behavior of the minimum and maximum limits in the X-rotation.

If set to true, the X-rotation of the camera is wrapped from minimum to maximum and from maximum to minimum. If set to false, the X-rotation of the camera is limited to the sector determined by the minimum and maximum values. Set to true by default.

Access functions:

bool	wrapXRotation() const
void	setWrapXRotation(bool isEnabled)

Notifier signal:

void	wrapXRotationChanged(bool isEnabled)

wrapYRotation : bool

This property holds the behavior of the minimum and maximum limits in the Y-rotation.

If true, the Y-rotation of the camera is wrapped from minimum to maximum and from maximum to minimum. If false, the Y-rotation of the camera is limited to the sector determined by the minimum and maximum values. Set to true by default.

Access functions:

bool	wrapYRotation() const
void	setWrapYRotation(bool isEnabled)

Notifier signal:

void	wrapYRotationChanged(bool isEnabled)

xRotation : float

This property holds the X-rotation angle of the camera around the target point in degrees.

Access functions:

float	xRotation() const
void	setXRotation(float rotation)

Notifier signal:

void	xRotationChanged(float rotation)

yRotation : float

This property holds the Y-rotation angle of the camera around the target point in degrees.

Access functions:

float	yRotation() const
void	setYRotation(float rotation)

Notifier signal:

void	yRotationChanged(float rotation)

zoomLevel : float

This property holds the camera zoom level in percentage.

The default value of 100.0f means there is no zoom in or out set in the camera. The value is limited by the minZoomLevel and maxZoomLevel properties.

Access functions:

float	zoomLevel() const
void	setZoomLevel(float zoomLevel)

Notifier signal:

void	zoomLevelChanged(float zoomLevel)

See also minZoomLevel and maxZoomLevel.

Member Function Documentation

Q3DCamera::Q3DCamera(QObject **parent* = nullptr)

Constructs a new 3D camera with position set to origin, up direction facing towards the Y-axis and looking at origin by default. An optional parent parameter can be given and is then passed to QObject constructor.

`[virtual]` Q3DCamera::~Q3DCamera()

Destroys the camera object.

`[override virtual]` void Q3DCamera::copyValuesFrom(const Q3DObject &source)

Reimplements: Q3DObject::copyValuesFrom(const Q3DObject &source).

Copies the 3D camera's properties from the given source camera. Values are copied from the source to this object.

void Q3DCamera::setCameraPosition(float horizontal, float vertical, float zoom = 100.0f)

Utility function that sets the camera rotations and distance.horizontal and vertical define the camera rotations to be used. Optional zoom parameter can be given to set the zoom percentage of the camera within the bounds defined by minZoomLevel and maxZoomLevel properties.

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Q3DCamera Class

Public Types

Properties

Public Functions

Reimplemented Public Functions

Signals

Detailed Description

Member Type Documentation

enum Q3DCamera::CameraPreset

Property Documentation

cameraPreset : CameraPreset

maxZoomLevel : float

minZoomLevel : float

target : QVector3D

wrapXRotation : bool

wrapYRotation : bool

xRotation : float

yRotation : float

zoomLevel : float

Member Function Documentation

Q3DCamera::Q3DCamera(QObject *parent = nullptr)

[virtual] Q3DCamera::~Q3DCamera()

[override virtual] void Q3DCamera::copyValuesFrom(const Q3DObject &source)

void Q3DCamera::setCameraPosition(float horizontal, float vertical, float zoom = 100.0f)

Q3DCamera::Q3DCamera(QObject **parent* = nullptr)

`[virtual]` Q3DCamera::~Q3DCamera()

`[override virtual]` void Q3DCamera::copyValuesFrom(const Q3DObject &source)