OGRE  1.12.4
Object-Oriented Graphics Rendering Engine
Ogre::GL3PlusHardwareOcclusionQuery Class Reference

This is a class that is the base class of the query class for hardware occlusion. More...

#include <OgreGL3PlusHardwareOcclusionQuery.h>

+ Inheritance diagram for Ogre::GL3PlusHardwareOcclusionQuery:

Public Member Functions

 GL3PlusHardwareOcclusionQuery ()
 Default object constructor. More...
 
 ~GL3PlusHardwareOcclusionQuery ()
 Object destructor. More...
 
void beginOcclusionQuery ()
 Starts the hardware occlusion query. More...
 
void endOcclusionQuery ()
 Ends the hardware occlusion test. More...
 
unsigned int getLastQuerysPixelcount () const
 Let's you get the last pixel count with out doing the hardware occlusion test. More...
 
bool isStillOutstanding (void)
 Lets you know when query is done, or still be processed by the Hardware. More...
 
bool pullOcclusionQuery (unsigned int *NumOfFragments)
 Pulls the hardware occlusion query. More...
 

Detailed Description

This is a class that is the base class of the query class for hardware occlusion.

Author
Lee Sandberg email: lee@a.nosp@m.bcme.nosp@m.dia.s.nosp@m.e Updated on 13/9/2005 by Tuan Kuranes email: tuan..nosp@m.kura.nosp@m.nes@f.nosp@m.ree..nosp@m.fr

Constructor & Destructor Documentation

◆ GL3PlusHardwareOcclusionQuery()

Ogre::GL3PlusHardwareOcclusionQuery::GL3PlusHardwareOcclusionQuery ( )

Default object constructor.

◆ ~GL3PlusHardwareOcclusionQuery()

Ogre::GL3PlusHardwareOcclusionQuery::~GL3PlusHardwareOcclusionQuery ( )

Object destructor.

Member Function Documentation

◆ beginOcclusionQuery()

void Ogre::GL3PlusHardwareOcclusionQuery::beginOcclusionQuery ( )
virtual

Starts the hardware occlusion query.

Remarks
Simple usage: Create one or more OcclusionQuery object one per outstanding query or one per tested object OcclusionQuery* mOcclusionQuery; createOcclusionQuery( &mOcclusionQuery ); In the rendering loop: Draw all occluders mOcclusionQuery->startOcclusionQuery(); Draw the polygons to be tested mOcclusionQuery->endOcclusionQuery();

Results must be pulled using: UINT mNumberOfPixelsVisable; pullOcclusionQuery( &mNumberOfPixelsVisable );

Implements Ogre::HardwareOcclusionQuery.

◆ endOcclusionQuery()

void Ogre::GL3PlusHardwareOcclusionQuery::endOcclusionQuery ( )
virtual

Ends the hardware occlusion test.

Implements Ogre::HardwareOcclusionQuery.

◆ pullOcclusionQuery()

bool Ogre::GL3PlusHardwareOcclusionQuery::pullOcclusionQuery ( unsigned int *  NumOfFragments)
virtual

Pulls the hardware occlusion query.

Note
Waits until the query result is available; use isStillOutstanding if just want to test if the result is available.
Return values
NumOfFragmentswill get the resulting number of fragments.
Returns
True if success or false if not.

Implements Ogre::HardwareOcclusionQuery.

◆ isStillOutstanding()

bool Ogre::GL3PlusHardwareOcclusionQuery::isStillOutstanding ( void  )
virtual

Lets you know when query is done, or still be processed by the Hardware.

Returns
true if query isn't finished.

Implements Ogre::HardwareOcclusionQuery.

◆ getLastQuerysPixelcount()

unsigned int Ogre::HardwareOcclusionQuery::getLastQuerysPixelcount ( ) const
inlineinherited

Let's you get the last pixel count with out doing the hardware occlusion test.

Returns
The last fragment count from the last test. Remarks This function won't give you new values, just the old value.

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