# ManipulatedCameraFrame Class Reference

The ManipulatedCameraFrame class represents a ManipulatedFrame with Camera specific mouse bindings. More...

List of all members.

## Public Member Functions
| ManipulatedCameraFrame ()
virtual | ~ManipulatedCameraFrame ()
| ManipulatedCameraFrame (const ManipulatedCameraFrame &mcf)
ManipulatedCameraFrame & | operator= (const ManipulatedCameraFrame &mcf)
## Revolve around point
Vec | revolveAroundPoint () const
void | setRevolveAroundPoint (const Vec &revolveAroundPoint)
## Fly parameters
float | flySpeed () const
Vec | flyUpVector () const
void | setFlySpeed (float speed)
void | setFlyUpVector (const Vec &up)
## XML representation
virtual QDomElement | domElement (const QString &name, QDomDocument &document) const
virtual void | initFromDOMElement (const QDomElement &element)
## Mouse event handlers
virtual void | mouseReleaseEvent (QMouseEvent *const event, Camera *const camera)
virtual void | mouseMoveEvent (QMouseEvent *const event, Camera *const camera)
virtual void | wheelEvent (QWheelEvent *const event, Camera *const camera)
## Spinning
virtual void | spin ()

## Detailed Description

The ManipulatedCameraFrame class represents a ManipulatedFrame with Camera specific mouse bindings.

A ManipulatedCameraFrame is a specialization of a ManipulatedFrame, designed to be set as the Camera::frame(). Mouse motions are basically interpreted in a negated way: when the mouse goes to the right, the ManipulatedFrame translation goes to the right, while the ManipulatedCameraFrame has to go to the left, so that the scene seems to move to the right.

A ManipulatedCameraFrame rotates around its revolveAroundPoint(), which corresponds to the associated Camera::revolveAroundPoint().

A ManipulatedCameraFrame can also "fly" in the scene. It basically moves forward, and turns according to the mouse motion. See flySpeed(), flyUpVector() and the MOVE_FORWARD and MOVE_BACKWARD QGLViewer::MouseAction.

See the mouse page for a description of the possible actions that can be performed using the mouse and their bindings.

## Constructor & Destructor Documentation

ManipulatedCameraFrame | ( |  | ) |

Default constructor.

flySpeed() is set to 0.0 and flyUpVector() is (0,1,0). The revolveAroundPoint() is set to (0,0,0).

Attention:
  Created object is removeFromMouseGrabberPool().

virtual ~ManipulatedCameraFrame | ( |  | ) | `[virtual]`

Virtual destructor. Empty.

ManipulatedCameraFrame | ( | const ManipulatedCameraFrame & | mcf | ) |

Copy constructor. Performs a deep copy of all members using operator=().

## Member Function Documentation

QDomElement domElement | ( | const QString & | name,
|  | QDomDocument & | document |
| ) |  |  | const`[virtual]`

Returns an XML `QDomElement` that represents the ManipulatedCameraFrame.

Adds to the ManipulatedFrame::domElement() the ManipulatedCameraFrame specific informations in a `ManipulatedCameraParameters` child QDomElement.

`name` is the name of the QDomElement tag. `doc` is the `QDomDocument` factory used to create QDomElement.

Use initFromDOMElement() to restore the ManipulatedCameraFrame state from the resulting `QDomElement`.

See Vec::domElement() for a complete example. See also Quaternion::domElement(), Frame::domElement(), Camera::domElement()...

Reimplemented from ManipulatedFrame.

float flySpeed | ( |  | ) | const

Returns the fly speed, expressed in OpenGL units.

It corresponds to the incremental displacement that is periodically applied to the ManipulatedCameraFrame position when a MOVE_FORWARD or MOVE_BACKWARD QGLViewer::MouseAction is proceeded.

Attention:
  When the ManipulatedCameraFrame is set as the Camera::frame(), this value is set according to the QGLViewer::sceneRadius() by QGLViewer::setSceneRadius().

Vec flyUpVector | ( |  | ) | const

Returns the up vector used in fly mode, expressed in the world coordinate system.

Fly mode corresponds to the MOVE_FORWARD and MOVE_BACKWARD QGLViewer::MouseAction bindings. In these modes, horizontal displacements of the mouse rotate the ManipulatedCameraFrame around this vector. Vertical displacements rotate always around the Camera `X` axis.

Default value is (0,1,0), but it is updated by the Camera when set as its Camera::frame(). Camera::setOrientation() and Camera::setUpVector()) modify this value and should be used instead.

void initFromDOMElement | ( | const QDomElement & | element | ) | `[virtual, slot]`

Restores the ManipulatedCameraFrame state from a `QDomElement` created by domElement().

First calls ManipulatedFrame::initFromDOMElement() and then initializes ManipulatedCameraFrame specific parameters.

Reimplemented from ManipulatedFrame.

void mouseMoveEvent | ( | QMouseEvent *const | event,
|  | Camera *const | camera |
| ) |  |  | `[protected, virtual]`

Overloading of ManipulatedFrame::mouseMoveEvent().

Motion depends on mouse binding (see mouse page for details). The resulting displacements are basically inverted from those of a ManipulatedFrame.

Reimplemented from ManipulatedFrame.

void mouseReleaseEvent | ( | QMouseEvent *const | event,
|  | Camera *const | camera |
| ) |  |  | `[protected, virtual]`

This is an overload of ManipulatedFrame::mouseReleaseEvent(). The QGLViewer::MouseAction is terminated.

Reimplemented from ManipulatedFrame.

ManipulatedCameraFrame & operator= | ( | const ManipulatedCameraFrame & | mcf | ) |

Equal operator. Calls ManipulatedFrame::operator=() and then copy attributes.

Vec revolveAroundPoint | ( |  | ) | const

Returns the point the ManipulatedCameraFrame revolves around when rotated.

It is defined in the world coordinate system. Default value is (0,0,0).

When the ManipulatedCameraFrame is associated to a Camera, Camera::revolveAroundPoint() also returns this value. This point can interactively be changed using the mouse (see RAP_FROM_PIXEL and RAP_IS_CENTER in the mouse page).

void setFlySpeed | ( | float | speed | ) | `[slot]`

Sets the flySpeed(), defined in OpenGL units.

Default value is 0.0, but it is modified according to the QGLViewer::sceneRadius() when the ManipulatedCameraFrame is set as the Camera::frame().

void setFlyUpVector | ( | const Vec & | up | ) | `[slot]`

Sets the flyUpVector(), defined in the world coordinate system.

Default value is (0,1,0), but it is updated by the Camera when set as its Camera::frame(). Use Camera::setUpVector() instead in that case.

void setRevolveAroundPoint | ( | const Vec & | revolveAroundPoint | ) |

Sets the revolveAroundPoint(), defined in the world coordinate system.

void spin | ( |  | ) | `[protected, virtual, slot]`

Overloading of ManipulatedFrame::spin().

Rotates the ManipulatedCameraFrame around its revolveAroundPoint() instead of its origin.

Reimplemented from ManipulatedFrame.

void wheelEvent | ( | QWheelEvent *const | event,
|  | Camera *const | camera |
| ) |  |  | `[protected, virtual]`

This is an overload of ManipulatedFrame::wheelEvent().

The wheel behavior depends on the wheel binded action. Current possible actions are ZOOM, MOVE_FORWARD, MOVE_BACKWARD. ZOOM speed depends on wheelSensitivity() while MOVE_FORWARD and MOVE_BACKWARD depend on flySpeed(). See QGLViewer::setWheelBinding() to customize the binding.

Reimplemented from ManipulatedFrame.