vtkStateStorage Class Reference

Class to make storing and comparing state quick and easy. More...

#include <vtkStateStorage.h>

Public Member Functions
	vtkStateStorage ()=default
void	Clear ()
template<class T >
void	Append (const T &value, const char *name)
bool	operator!= (const vtkStateStorage &b) const
vtkStateStorage &	operator= (const vtkStateStorage &b)=default

Protected Attributes
std::vector< unsigned char >	Storage

Detailed Description

Class to make storing and comparing state quick and easy.

vtkStateStorage is just a thin wrapper around std::vector<unsigned char> It is best to use this class as an ivar so that allocs do not happen too often.

Example usage:

// compute the new state in a temp ivar
// note that clear does not free memory
this->TempState.Clear();
this->TempState.Append(act->GetProperty()->GetMTime(), "property mtime");
this->TempState.Append(
  this->CurrentInput ? this->CurrentInput->GetMTime() : 0, "input mtime");
this->TempState.Append(
  act->GetTexture() ? act->GetTexture()->GetMTime() : 0, "texture mtime");
 
// now compare against the last state value
 
if (this->VBOBuildState != this->TempState)
{
  // set the ivar to the new state
  this->VBOBuildState = this->TempState;
  do something...
}

Definition at line 123 of file vtkStateStorage.h.

Constructor & Destructor Documentation

vtkStateStorage()

vtkStateStorage::vtkStateStorage ( )

default

Member Function Documentation

Clear()

void vtkStateStorage::Clear ( )

inline

Definition at line 129 of file vtkStateStorage.h.

Append()

template<class T >

void vtkStateStorage::Append ( const T &  value, const char *  name  )

inline

Definition at line 147 of file vtkStateStorage.h.

operator!=()

bool vtkStateStorage::operator!= ( const vtkStateStorage &  b ) const

inline

Definition at line 135 of file vtkStateStorage.h.

operator=()

vtkStateStorage & vtkStateStorage::operator= ( const vtkStateStorage &  b )

default

Member Data Documentation

Storage

std::vector<unsigned char> vtkStateStorage::Storage

protected

Definition at line 140 of file vtkStateStorage.h.

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

• Rendering/Core/vtkStateStorage.h