#include <rewindablesampler.h>

Public Member Functions
	LM_COMPONENT_INTERFACE_DEF ("rewindablesampler")

virtual void	Configure (Random *rng)=0

virtual void	Rewind (int index)=0

virtual int	SampleIndex () const =0

Public Member Functions inherited from Sampler
virtual Sampler *	Clone () const =0

virtual void	SetSeed (unsigned int seed)=0

virtual Math::Float	Next ()=0

virtual unsigned int	NextUInt ()=0

virtual Math::Vec2	NextVec2 ()=0

virtual Random *	Rng ()=0

LM_PUBLIC_API void	SetSeedWithCurrentTime ()

Public Member Functions inherited from Component
virtual std::string	ComponentInterfaceTypeName () const =0

virtual std::string	ComponentImplTypeName () const =0

Public Member Functions inherited from SIMDAlignedType
void *	operator new (std::size_t size) throw (std::bad_alloc)

void	operator delete (void *p)

Detailed Description

Rewindable sampler. A sampler implementation for restoring sample sequence afterwards. This sampler is introduced to avoid to save unnecessary light paths in the initial sampling process of MLT or PSSMLT.

Inheritance diagram for RewindableSampler:

Member Function Documentation

virtual void RewindableSampler::Configure ( Random * rng )

pure virtual

Configure the sampler. Initializes underlying random number generator with the given value. This function must be called before use. Ownership of #rng is delegated to this class. Seed is not explicitly refreshed, so do not forget to call SetSeed after calling this function before use.

Parameters

rng	Random number generator.

Implemented in RewindableSamplerImpl.

virtual void RewindableSampler::Rewind ( int index )

pure virtual

Rewind the sampler to the given index. Moves the index of the sampler to #index and gets the sampler ready to regenerate random numbers after #index. The index values can be obtained by SampleIndex function. In the condition of the same seed, this function guarantees to generate same sequence of samples after #index.

Parameters

index Sample index.

See also: SampleIndex

Implemented in RewindableSamplerImpl.

virtual int RewindableSampler::SampleIndex ( ) const

pure virtual

Get the current sampler index. The value is used for rewinding the sampler.

Returns: Current sample index.

See also: Rewind

Implemented in RewindableSamplerImpl.

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

/home/travis/build/hi2p-perim/lightmetrica/include/lightmetrica/rewindablesampler.h

Public Member Functions

Detailed Description

Member Function Documentation