ScenePartition.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2023 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "CeresEngine/Entity/System.hpp"
#include "CeresEngine/Math/Vector.hpp"
#include "CeresEngine/Scene/SceneObject.hpp"
#include "CeresEngine/Scene/Camera.hpp"
 
namespace CeresEngine {
 
    class ScenePartition;
 
    class ScenePartition {
    protected:
        World& mWorld;
 
    public:
        ScenePartition(World& world);
        virtual ~ScenePartition();
 
    public:
        [[nodiscard]] virtual SceneObject rayCast(const Ray& ray) = 0;
 
        [[nodiscard]] SceneObject rayCast(const Vector3& origin, const Vector3& direction) { return rayCast(Ray(origin, direction)); }
 
    protected:
        friend class ScenePartitionSystem;
 
        virtual void rebuild() = 0;
 
        virtual void addSceneObject(const SceneObject& sceneObject) = 0;
 
        virtual void updateSceneObject(const SceneObject& sceneObject) = 0;
 
        virtual void removeSceneObject(const SceneObject& sceneObject) = 0;
    };
 
    class ScenePartitionSystem : public System<ScenePartitionSystem, EntityObjectSet<SceneObject>> {
    private:
        UPtr<ScenePartition> mScenePartition;
 
    public:
        [[nodiscard]] SceneObject rayCast(const Ray& ray);
 
        [[nodiscard]] SceneObject rayCast(const Vector3& origin, const Vector3& direction) { return rayCast(Ray(origin, direction)); }
 
    private:
        void didAdd(const SceneObject& entity) noexcept final;
 
        void didRemove(const SceneObject& entity) noexcept final;
 
        void didChange(const SceneObject& entity, const EntityChangeSet& changeSet) noexcept final;
    };
 
} // namespace CeresEngine