Crazy Eddies GUI System  0.7.2
Public Member Functions | List of all members
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 RectgetArea () 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
OpenGLRendererd_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
areaRect 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

Implements CEGUI::RenderTarget.