RenderSystem.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Development Kit"
// For conditions of distribution and use, see copyright notice in Prerequesites.hpp

#pragma once

#ifndef NDK_SERVER
#ifndef NDK_SYSTEMS_RENDERSYSTEM_HPP
#define NDK_SYSTEMS_RENDERSYSTEM_HPP

#include <Nazara/Graphics/AbstractBackground.hpp>
#include <Nazara/Graphics/CullingList.hpp>
#include <Nazara/Graphics/DepthRenderTechnique.hpp>
#include <Nazara/Renderer/RenderTexture.hpp>
#include <NDK/EntityList.hpp>
#include <NDK/System.hpp>
#include <NDK/Components/GraphicsComponent.hpp>
#include <vector>

namespace Ndk
{
    class AbstractViewer;

    class NDK_API RenderSystem : public System<RenderSystem>
    {
        public:
            RenderSystem();
            inline RenderSystem(const RenderSystem& renderSystem);
            ~RenderSystem() = default;

            template<typename T> T& ChangeRenderTechnique();
            inline Nz::AbstractRenderTechnique& ChangeRenderTechnique(std::unique_ptr<Nz::AbstractRenderTechnique>&& renderTechnique);

            inline const Nz::BackgroundRef& GetDefaultBackground() const;
            inline const Nz::Matrix4f& GetCoordinateSystemMatrix() const;
            inline Nz::Vector3f GetGlobalForward() const;
            inline Nz::Vector3f GetGlobalRight() const;
            inline Nz::Vector3f GetGlobalUp() const;
            inline Nz::AbstractRenderTechnique& GetRenderTechnique() const;

            inline void SetDefaultBackground(Nz::BackgroundRef background);
            inline void SetGlobalForward(const Nz::Vector3f& direction);
            inline void SetGlobalRight(const Nz::Vector3f& direction);
            inline void SetGlobalUp(const Nz::Vector3f& direction);

            static SystemIndex systemIndex;

        private:
            inline void InvalidateCoordinateSystem();

            void OnEntityRemoved(Entity* entity) override;
            void OnEntityValidation(Entity* entity, bool justAdded) override;
            void OnUpdate(float elapsedTime) override;

            void UpdateDynamicReflections();
            void UpdateDirectionalShadowMaps(const Nz::AbstractViewer& viewer);
            void UpdatePointSpotShadowMaps();

            std::unique_ptr<Nz::AbstractRenderTechnique> m_renderTechnique;
            std::vector<GraphicsComponentCullingList::VolumeEntry> m_volumeEntries;
            std::vector<EntityHandle> m_cameras;
            EntityList m_drawables;
            EntityList m_directionalLights;
            EntityList m_lights;
            EntityList m_pointSpotLights;
            EntityList m_particleGroups;
            EntityList m_realtimeReflected;
            GraphicsComponentCullingList m_drawableCulling;
            Nz::BackgroundRef m_background;
            Nz::DepthRenderTechnique m_shadowTechnique;
            Nz::Matrix4f m_coordinateSystemMatrix;
            Nz::RenderTexture m_shadowRT;
            bool m_coordinateSystemInvalidated;
            bool m_forceRenderQueueInvalidation;
    };
}

#include <NDK/Systems/RenderSystem.inl>

#endif // NDK_SYSTEMS_RENDERSYSTEM_HPP
#endif // NDK_SERVER