Ogre::GLHardwareOcclusionQuery Class Reference

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

#include <OgreGLHardwareOcclusionQuery.h>

Inheritance diagram for Ogre::GLHardwareOcclusionQuery:

List of all members.

Public Member Functions
	GLHardwareOcclusionQuery ()
	Default object constructor.
	~GLHardwareOcclusionQuery ()
	Object destructor.
void	beginOcclusionQuery ()
	Starts the hardware occlusion query Simple usage: Create one or more OcclusionQuery object one per outstanding query or one per tested object OcclusionQuery* m_pOcclusionQuery; createOcclusionQuery( &m_pOcclusionQuery ); In the rendering loop: Draw all occluders m_pOcclusionQuery->startOcclusionQuery(); Draw the polygons to be tested m_pOcclusionQuery->endOcclusionQuery();.
void	endOcclusionQuery ()
	Ends the hardware occlusion test.
bool	pullOcclusionQuery (unsigned int *NumOfFragments)
	Pulls the hardware occlusion query too see if there is a result.
bool	isStillOutstanding (void)
unsigned int	getLastQuerysPixelcount () const
	Let's you get the last pixel count with out doing the hardware occlusion test.
virtual bool	HardwareOcclusionQuery::isStillOutstanding (void)=0
	Lets you know when query is done, or still be processed by the Hardware.
Protected Attributes
unsigned int	mPixelCount
bool	mIsQueryResultStillOutstanding
Private Attributes
GLuint	mQueryID

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Detailed Description

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

Author:

Lee Sandberg email: lee@abcmedia.se Updated on 13/9/2005 by Tuan Kuranes email: tuan.kuranes@free.fr

Definition at line 69 of file OgreGLHardwareOcclusionQuery.h.

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Constructor & Destructor Documentation

Ogre::GLHardwareOcclusionQuery::GLHardwareOcclusionQuery (   )

Default object constructor.

Ogre::GLHardwareOcclusionQuery::~GLHardwareOcclusionQuery (   )

Object destructor.

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Member Function Documentation

void Ogre::GLHardwareOcclusionQuery::beginOcclusionQuery (   )  [virtual]

Starts the hardware occlusion query Simple usage: Create one or more OcclusionQuery object one per outstanding query or one per tested object OcclusionQuery* m_pOcclusionQuery; createOcclusionQuery( &m_pOcclusionQuery ); In the rendering loop: Draw all occluders m_pOcclusionQuery->startOcclusionQuery(); Draw the polygons to be tested m_pOcclusionQuery->endOcclusionQuery();. Results must be pulled using: UINT m_uintNumberOfPixelsVisable; pullOcclusionQuery( &m_dwNumberOfPixelsVisable ); Implements Ogre::HardwareOcclusionQuery.

void Ogre::GLHardwareOcclusionQuery::endOcclusionQuery (   )  [virtual]

Ends the hardware occlusion test. Implements Ogre::HardwareOcclusionQuery.

unsigned int Ogre::HardwareOcclusionQuery::getLastQuerysPixelcount (   )  const [inherited]

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. Definition at line 98 of file OgreHardwareOcclusionQuery.h.

virtual bool Ogre::HardwareOcclusionQuery::HardwareOcclusionQuery::isStillOutstanding (  void   )  [pure virtual, inherited]

Lets you know when query is done, or still be processed by the Hardware. Returns: true if query isn't finished.

bool Ogre::GLHardwareOcclusionQuery::isStillOutstanding (  void   )

bool Ogre::GLHardwareOcclusionQuery::pullOcclusionQuery (  unsigned int *  NumOfFragments  )  [virtual]

Pulls the hardware occlusion query too see if there is a result. Return values: NumOfFragments  will get the resulting number of fragments. Returns: True if success or false if not. Implements Ogre::HardwareOcclusionQuery.

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Member Data Documentation

bool Ogre::HardwareOcclusionQuery::mIsQueryResultStillOutstanding [protected, inherited]

Definition at line 114 of file OgreHardwareOcclusionQuery.h.

unsigned int Ogre::HardwareOcclusionQuery::mPixelCount [protected, inherited]

Definition at line 112 of file OgreHardwareOcclusionQuery.h.

GLuint Ogre::GLHardwareOcclusionQuery::mQueryID [private]

Definition at line 99 of file OgreGLHardwareOcclusionQuery.h.

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

• OgreGLHardwareOcclusionQuery.h

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Copyright © 2000-2005 by The OGRE Team

This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Mar 12 14:52:40 2006