pssmlt.sampler.h

/*
    Lightmetrica : A research-oriented renderer

    Copyright (c) 2014 Hisanari Otsu

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once
#ifndef LIB_LIGHTMETRICA_PSSMLT_SAMPLER_H
#define LIB_LIGHTMETRICA_PSSMLT_SAMPLER_H

#include "sampler.h"
#include "math.types.h"

LM_NAMESPACE_BEGIN

class Random;
class RewindableSampler;

class PSSMLTPrimarySampler : public Sampler
{
public:

    LM_COMPONENT_INTERFACE_DEF("pssmltprimarysampler");

public:

    PSSMLTPrimarySampler() {}
    virtual ~PSSMLTPrimarySampler() {}

public:

    virtual void Configure(Random* rng, const Math::Float& s1, const Math::Float& s2) = 0;

    virtual void Accept() = 0;

    virtual void Reject() = 0;

    virtual void EnableLargeStepMutation(bool enable) = 0;

    virtual bool LargeStepMutation() const = 0;

    virtual void BeginRestore(RewindableSampler& rewindableSampler) = 0;
    
    virtual void EndRestore() = 0;

public:

    virtual void GetCurrentSampleState(std::vector<Math::Float>& samples) const = 0;
    virtual void GetCurrentSampleState(std::vector<Math::Float>& samples, int numSamples) = 0;

};

LM_NAMESPACE_END

#endif // LIB_LIGHTMETRICA_PSSMLT_SAMPLER_H