OGRE  1.12.12
Object-Oriented Graphics Rendering Engine
Ogre::Pass::HashFunc Struct Referenceabstract

Definition of a functor for calculating the hashcode of a Pass. More...

#include <OgrePass.h>

Public Member Functions

virtual ~HashFunc ()
 Need virtual destructor in case subclasses use it. More...
 
virtual uint32 operator() (const Pass *p) const =0
 

Detailed Description

Definition of a functor for calculating the hashcode of a Pass.

Remarks
The hashcode of a Pass is used to sort Passes for rendering, in order to reduce the number of render state changes. Each Pass represents a single unique set of states, but by ordering them, state changes can be minimised between passes. An implementation of this functor should order passes so that the elements that you want to keep constant are sorted next to each other.

Hash format is 32-bit, divided as follows (high to low bits) bits purpose 4 Pass index (i.e. max 16 passes!). 28 Pass contents

Note
the high bits returned by this function will get overwritten
See also
Pass::setHashFunc

Constructor & Destructor Documentation

◆ ~HashFunc()

virtual Ogre::Pass::HashFunc::~HashFunc ( )
inlinevirtual

Need virtual destructor in case subclasses use it.

Member Function Documentation

◆ operator()()

virtual uint32 Ogre::Pass::HashFunc::operator() ( const Pass p) const
pure virtual

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