Ogre::D3D9HardwareOcclusionQuery Class Reference

This is a class that is the DirectX9 implementation of hardware occlusion testing. More...

#include <OgreD3D9HardwareOcclusionQuery.h>

Inheritance diagram for Ogre::D3D9HardwareOcclusionQuery:

List of all members.

Public Member Functions
	D3D9HardwareOcclusionQuery (IDirect3DDevice9 *pD3DDevice)
	Default object constructor.
	~D3D9HardwareOcclusionQuery ()
	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.
unsigned int	getLastQuerysPixelcount ()
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
IDirect3DQuery9 *	mpQuery
IDirect3DDevice9 *	mpDevice

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Detailed Description

This is a class that is the DirectX9 implementation of hardware occlusion testing.

Author:

Lee Sandberg, email lee@abcmedia.se

Updated on 12/7/2004 by Chris McGuirk Updated on 4/8/2005 by Tuan Kuranes email: tuan.kuranes@free.fr

Definition at line 50 of file OgreD3D9HardwareOcclusionQuery.h.

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Constructor & Destructor Documentation

Ogre::D3D9HardwareOcclusionQuery::D3D9HardwareOcclusionQuery (  IDirect3DDevice9 *  pD3DDevice  )

Default object constructor.

Ogre::D3D9HardwareOcclusionQuery::~D3D9HardwareOcclusionQuery (   )

Object destructor.

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Member Function Documentation

void Ogre::D3D9HardwareOcclusionQuery::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::D3D9HardwareOcclusionQuery::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.

unsigned int Ogre::D3D9HardwareOcclusionQuery::getLastQuerysPixelcount (   )

Definition at line 75 of file OgreD3D9HardwareOcclusionQuery.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::D3D9HardwareOcclusionQuery::isStillOutstanding (  void   )

bool Ogre::D3D9HardwareOcclusionQuery::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.

IDirect3DDevice9* Ogre::D3D9HardwareOcclusionQuery::mpDevice [private]

Definition at line 85 of file OgreD3D9HardwareOcclusionQuery.h.

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

Definition at line 112 of file OgreHardwareOcclusionQuery.h.

IDirect3DQuery9* Ogre::D3D9HardwareOcclusionQuery::mpQuery [private]

Definition at line 84 of file OgreD3D9HardwareOcclusionQuery.h.

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

• OgreD3D9HardwareOcclusionQuery.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 14:50:38 2006