OcclusionQuery Class Reference

#include <OcclusionQuery.h>

List of all members.

Public Member Functions
	OcclusionQuery ()
virtual	~OcclusionQuery ()
virtual bool	ResultAvailable () const
virtual unsigned int	GetQueryResult () const
virtual void	BeginQuery ()
virtual void	EndQuery ()
unsigned int	GetQueryId () const
Static Public Member Functions
static void	GenQueries (std::vector< OcclusionQuery * > &queries, const int numQueries)
Protected Member Functions
	OcclusionQuery (const unsigned int idx)
Protected Attributes
unsigned int	mId
Static Protected Attributes
static bool	sUseArbQueries = true

---

Detailed Description

This class is an implementation for occlusion queries.

Remarks:

the class encapsulates occlusion query calls.

Definition at line 9 of file OcclusionQuery.h.

---

Constructor & Destructor Documentation

OcclusionQuery::OcclusionQuery

(

)

Definition at line 22 of file OcclusionQuery.cpp.

{
  GLuint id;

  if (sUseArbQueries) {
       glGenQueriesARB(1, &id);
  } else {           
       glGenOcclusionQueriesNV(1, &id);
  }
}

OcclusionQuery::~OcclusionQuery

(

)

[virtual]

Definition at line 38 of file OcclusionQuery.cpp.

{
  if (sUseArbQueries) {
       glDeleteQueriesARB(1, &mId);
  } else {
       glDeleteOcclusionQueriesNV(1, &mId);
  }
}

OcclusionQuery::OcclusionQuery

(

const unsigned int

idx

)

[protected]

Definition at line 33 of file OcclusionQuery.cpp.

                                                    :
  mId(idx)
{}

---

Member Function Documentation

bool OcclusionQuery::ResultAvailable

(

)

const [virtual]

Definition at line 76 of file OcclusionQuery.cpp.

{
  GLuint available;
  
  if (sUseArbQueries) {
       glGetQueryObjectuivARB(mId,
                                             GL_QUERY_RESULT_AVAILABLE_ARB,
                                             &available);
       return available == GL_TRUE;
  } else {
         glGetOcclusionQueryuivNV(mId, GL_PIXEL_COUNT_AVAILABLE_NV, &available);
         return available == GL_TRUE;
  }
}

unsigned int OcclusionQuery::GetQueryResult

(

)

const [virtual]

Definition at line 93 of file OcclusionQuery.cpp.

{
  GLuint sampleCount;
  
  if (sUseArbQueries)       {
       glGetQueryObjectuivARB(mId, GL_QUERY_RESULT_ARB, &sampleCount);
       return sampleCount;
  } else {    
       glGetOcclusionQueryuivNV(mId, GL_PIXEL_COUNT_NV, &sampleCount);
       return sampleCount;
  }
}

void OcclusionQuery::BeginQuery

(

)

[virtual]

Definition at line 49 of file OcclusionQuery.cpp.

{
       if (sUseArbQueries) {
         glBeginQueryARB(GL_SAMPLES_PASSED_ARB, mId);
       } else {
         glBeginOcclusionQueryNV(mId);
       }
}

void OcclusionQuery::EndQuery

(

)

[virtual]

Definition at line 59 of file OcclusionQuery.cpp.

{
       if (sUseArbQueries) {
         glEndQueryARB(GL_SAMPLES_PASSED_ARB);
       } else {
         glEndOcclusionQueryNV();  
       }
}

void OcclusionQuery::GenQueries	(	std::vector< OcclusionQuery * > &	queries,
		const int	numQueries
	)			[static]

Definition at line 108 of file OcclusionQuery.cpp.

{
  //Debug<<"Generating queries "<<numQueries<<" occlussion queries"<<endl;
  if ((int)queries.size() < numQueries) {
       const int n = numQueries - (int)queries.size();
       GLuint *newQueries = new GLuint[n];

       LOG(wxString::Format(wxT("Generating %i occlusion queries."), n));
       
       if (sUseArbQueries) {
         glGenQueriesARB(n, newQueries);
       } else {
         glGenOcclusionQueriesNV(n, newQueries);
       }
       
       for (int i = 0; i < n; ++ i) {
         queries.push_back(new OcclusionQuery(newQueries[i]));
       }
       
       delete newQueries;
  }
}

unsigned int OcclusionQuery::GetQueryId

(

)

const

Definition at line 70 of file OcclusionQuery.cpp.

{
  return mId;
}

---

Member Data Documentation

bool OcclusionQuery::sUseArbQueries = true [static, protected]

Definition at line 30 of file OcclusionQuery.h.

unsigned int OcclusionQuery::mId [protected]

Definition at line 32 of file OcclusionQuery.h.

---

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

• /cygdrive/d/src/svn/vrut/trunk/modules/ChcRenderer/OcclusionQuery.h
• /cygdrive/d/src/svn/vrut/trunk/modules/ChcRenderer/OcclusionQuery.cpp