scene.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_SCENE_H
#define LIB_LIGHTMETRICA_SCENE_H

#include "component.h"
#include "math.types.h"
#include "aabb.h"
#include <string>
#include <functional>
#include <memory>
#include <boost/signals2.hpp>

LM_NAMESPACE_BEGIN

class Assets;
class ConfigNode;
class Camera;
class Light;
class Primitives;
struct Primitive;
struct Ray;
struct Intersection;

class Scene : public Component
{
public:

    LM_COMPONENT_INTERFACE_DEF("scene");

public:

    LM_PUBLIC_API Scene();
    LM_PUBLIC_API virtual ~Scene();

private:

    LM_DISABLE_COPY_AND_MOVE(Scene);

public:

    LM_PUBLIC_API void Load(Primitives* primitives);

    LM_PUBLIC_API bool PostConfigure();

    LM_PUBLIC_API bool Intersect(Ray& ray, Intersection& isect) const;

    LM_PUBLIC_API const Camera* MainCamera() const;

    LM_PUBLIC_API const Light* SampleLightSelection(Math::Vec2& lightSampleP, Math::PDFEval& selectionPdf) const;

    LM_PUBLIC_API const Light* SampleLightSelection(const Math::Float& lightSample, Math::PDFEval& selectionPdf) const;

    LM_PUBLIC_API Math::PDFEval LightSelectionPdf() const;

    LM_PUBLIC_API AABB GetAABB() const;

public:

    virtual bool Configure( const ConfigNode& node) = 0;

    virtual bool Build() = 0;

    virtual bool IntersectTriangles(Ray& ray, Intersection& isect) const = 0;

    virtual AABB GetAABBTriangles() const = 0;

public:

    virtual boost::signals2::connection Connect_ReportBuildProgress(const std::function<void (double, bool)>& func) = 0;

protected:

    void StoreIntersectionFromBarycentricCoords(unsigned int primitiveIndex, unsigned int triangleIndex, const Ray& ray, const Math::Vec2& b, Intersection& isect) const;

protected:

    std::unique_ptr<Primitives> primitives;

};

LM_NAMESPACE_END

#endif // LIB_LIGHTMETRICA_SCENE_H