bpt.fullpath.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_BPT_FULL_PATH_H
#define LIB_LIGHTMETRICA_BPT_FULL_PATH_H

#include "bpt.common.h"
#include "math.types.h"
#include "transportdirection.h"

LM_NAMESPACE_BEGIN

class BPTPathVertex;
class BPTSubpath;
class Scene;

class BPTFullPath
{
public:

    LM_PUBLIC_API BPTFullPath(int s, int t, const BPTSubpath& lightSubpath, const BPTSubpath& eyeSubpath);

private:

    LM_DISABLE_COPY_AND_MOVE(BPTFullPath);

public:

    LM_PUBLIC_API Math::Vec3 EvaluateUnweightContribution(const Scene& scene, Math::Vec2& rasterPosition) const;

    LM_PUBLIC_API Math::Float EvaluateFullpathPDF(int i) const;

    LM_PUBLIC_API Math::Float EvaluateFullpathPDFRatio(int i) const;

    LM_PUBLIC_API bool FullpathPDFIsZero(int i) const;

    LM_PUBLIC_API Math::Float PathSelectionProbability() const;

    LM_PUBLIC_API void DebugPrint() const;

public:

    LM_PUBLIC_API const BPTPathVertex* FullPathVertex(int i) const;

    LM_PUBLIC_API Math::PDFEval FullPathVertexDirectionPDF(int i, TransportDirection transportDir) const;

public:

    int s;                              
    int t;                              
    const BPTSubpath& lightSubpath;     
    const BPTSubpath& eyeSubpath;       
    Math::PDFEval pdfDL[2];             
    Math::PDFEval pdfDE[2];             

};

LM_NAMESPACE_END

#endif // LIB_LIGHTMETRICA_BPT_FULL_PATH_H