CEGUI::OpenGLViewportTarget Class Reference

OpenGL implementation of a RenderTarget that represents am on-scren viewport. More...

Inheritance diagram for CEGUI::OpenGLViewportTarget:

Collaboration diagram for CEGUI::OpenGLViewportTarget:

Public Member Functions
	OpenGLViewportTarget (OpenGLRenderer &owner)
	Construct a default OpenGLViewportTarget that uses the currently defined OpenGL viewport as it's initial area.
	OpenGLViewportTarget (OpenGLRenderer &owner, const Rect &area)
	Construct a OpenGLViewportTarget that uses the specified Rect as it's initial area. More...
bool	isImageryCache () const
	Return whether the RenderTarget is an implementation that caches actual rendered imagery. More...
Public Member Functions inherited from CEGUI::OpenGLRenderTarget
	OpenGLRenderTarget (OpenGLRenderer &owner)
	Constructor.
void	draw (const GeometryBuffer &buffer)
	Draw geometry from the given GeometryBuffer onto the surface that this RenderTarget represents. More...
void	draw (const RenderQueue &queue)
	Draw geometry from the given RenderQueue onto the surface that this RenderTarget represents. More...
void	setArea (const Rect &area)
	Set the area for this RenderTarget. The exact action this function will take depends upon what the concrete class is representing. For example, with a 'view port' style RenderTarget, this should set the area that the view port occupies on the display (or rendering window). More...
const Rect &	getArea () const
	Return the area defined for this RenderTarget. More...
void	activate ()
	Activate the render target and put it in a state ready to be drawn to. More...
void	deactivate ()
	Deactivate the render target after having completed rendering. More...
void	unprojectPoint (const GeometryBuffer &buff, const Vector2 &p_in, Vector2 &p_out) const
	Take point p_in unproject it and put the result in p_out. Resulting point is local to GeometryBuffer buff.
Public Member Functions inherited from CEGUI::RenderTarget
virtual	~RenderTarget ()
	Destructor.

Additional Inherited Members
Protected Member Functions inherited from CEGUI::OpenGLRenderTarget
virtual void	updateMatrix () const
	helper that initialises the cached matrix
Protected Attributes inherited from CEGUI::OpenGLRenderTarget
OpenGLRenderer &	d_owner
	OpenGLRenderer that created this object.
Rect	d_area
	holds defined area for the RenderTarget
double	d_matrix [16]
	saved copy of projection matrix
bool	d_matrixValid
	true if saved matrix is up to date
double	d_viewDistance
	tracks viewing distance (this is set up at the same time as d_matrix)
Static Protected Attributes inherited from CEGUI::OpenGLRenderTarget
static const double	d_yfov_tan
	tangent of the y FOV half-angle; used to calculate viewing distance.

Detailed Description

OpenGL implementation of a RenderTarget that represents am on-scren viewport.

Constructor & Destructor Documentation

CEGUI::OpenGLViewportTarget::OpenGLViewportTarget	(	OpenGLRenderer &	owner,
		const Rect &	area
	)

Construct a OpenGLViewportTarget that uses the specified Rect as it's initial area.

Parameters

area	Rect object describing the initial viewport area that should be used for the RenderTarget.

Member Function Documentation

bool CEGUI::OpenGLViewportTarget::isImageryCache ( ) const

virtual

Return whether the RenderTarget is an implementation that caches actual rendered imagery.

Typically it is expected that texture based RenderTargets would return
true in response to this call.  Other types of RenderTarget, like
view port based targets, will more likely return false.

Returns

• true if the RenderTarget does cache rendered imagery.
• false if the RenderTarget does not cache rendered imagery.

Implements CEGUI::RenderTarget.