67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
#pragma once
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#include <Core/Common/CoreUtils.h>
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#include <Core/Math/Vector.h>
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#include <Engine/Class.h>
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#include <Entity/entity_common.h>
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#include <Entity/EntityManager.h>
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struct Entity final
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{
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DECLARE_CLASS()
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EntityID ID = 0;
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Class* derived_kind = nullptr;
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DerivedType derived = nullptr;
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Vector4 position = {};
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};
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// Can reinterpret cast to this to have the offset of Base and Kind for any entity
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struct EntityTemplate
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{
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DECLARE_ENTITY();
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};
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//
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template <typename EntityType>
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concept EntityConcept = requires(EntityType entity) {
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{ EntityType::kind } -> std::convertible_to<const Class*>;
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requires std::same_as<decltype(entity.base), Entity*>;
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};
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template <typename EntityType>
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requires EntityConcept<EntityType>
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[[nodiscard]] bool IsA(const Entity* entity)
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{
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Assert(entity != nullptr);
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return entity->derived_kind == EntityType::kind;
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}
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template <typename EntityType>
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requires EntityConcept<EntityType>
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[[nodiscard]] EntityType* MakeEntity(EntityManager& manager, float x, float y, float z)
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{
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Entity* base_ptr = allocate_entity(manager, EntityType::kind);
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Assert(base_ptr);
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base_ptr->ID = EntityManager::ID++;
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base_ptr->position.x = x;
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base_ptr->position.y = y;
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base_ptr->position.z = z;
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base_ptr->position.w = 1.0f;
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return (EntityType*)base_ptr->derived;
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}
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template <typename EntityType>
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requires EntityConcept<EntityType>
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[[nodiscard]] EntityType* DownCast(Entity* entity)
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{
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Assert(entity != nullptr);
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Assert(IsA<EntityType>(entity));
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return static_cast<EntityType*>(entity->derived);
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}
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void serialize(Archive& ar, NonNullPtr<Entity> entity);
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