gramods::gmTouch::OSGCameraAdaptor Class Reference

Camera adaptor for OSG, providing means to set the projection matrix of TouchState by providing an OSG camera. More...

#include <OSGCameraAdaptor.hh>

Inheritance diagram for gramods::gmTouch::OSGCameraAdaptor:

Collaboration diagram for gramods::gmTouch::OSGCameraAdaptor:

Public Member Functions
bool	setCurrentProjection (osg::Camera *camera)
	Calculates and sets the current projection matrix to use when back-projecting the 2D touch points into 3D, and set the previously current to be used when back-projecting "previous" touch points.
Public Member Functions inherited from gramods::gmTouch::TouchState::CameraAdaptor
virtual void	init (int width, int height)
	Called by the owner (TouchState) when eventsInit is called.
virtual void	done ()
	Called by the owner (TouchState) when eventsDone is called.

Additional Inherited Members
Protected Member Functions inherited from gramods::gmTouch::TouchState::CameraAdaptor
void	setCurrentProjection (Eigen::Matrix4f WPV_inv)
	Sets the current (inverted) projection matrix to use when back-projecting the 2D touch points into 3D.

Detailed Description

Camera adaptor for OSG, providing means to set the projection matrix of TouchState by providing an OSG camera.

Typical use:

int width, height;
SDL_GetWindowSize(sdl_window, &width, &height);
 
touchState.eventsInit(width, height);
touchState.getCameraAdaptor<gmTouch::OSGCameraAdaptor>().setCurrentProjection(camera);
...
touchState.eventsDone();

Member Function Documentation

setCurrentProjection()

bool gramods::gmTouch::OSGCameraAdaptor::setCurrentProjection

(

osg::Camera *

camera

)

Calculates and sets the current projection matrix to use when back-projecting the 2D touch points into 3D, and set the previously current to be used when back-projecting "previous" touch points.

If the view changes over time, one of these methods needs to be called every frame, between calling eventsInit and eventsDone and before extrating 3D lines. If the view is static, it needs to be called at least twice, to make the current matrix be copied to previous state. The frame copying is performed even when the valid project cannot be extracted.

Returns

True if a valid projection could be extracted from the specified camera, false otherwise.

See also

TouchState::getCurrent3DTouchLine

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The documentation for this class was generated from the following files:

• /home/karlu/private/program/gramods/modules/gmTouch/include/gmTouch/OSGCameraAdaptor.hh
• /home/karlu/private/program/gramods/modules/gmTouch/src/OSGCameraAdaptor.cpp