62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
#pragma once
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#include <id/UUID.h> // Shadow-Engine/core/inc/id
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namespace SE {
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// An ID for a section of the scene (which may be unloaded separately of the level; for ie. open world Cells.)
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using EntitySectionID = UUID;
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// An ID for a scene (which contains all sections and entities).
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using EntitySceneID = UUID;
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/**
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* Contains the common data and functions for the Entity System's identifiers.
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*/
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struct IDContainer {
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public:
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IDContainer() = default;
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explicit IDContainer(uint64_t v) : id(v) {}
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// Check if the ID is valid (non-zero)
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__inline virtual bool Valid() const { return id != 0; }
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// Set this ID to be invalid (zero).
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__inline virtual void Invalidate() { id = 0; }
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// Check for in/equality against another ID.
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__inline virtual bool operator==(IDContainer const& other) const { return id == other.id; }
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__inline virtual bool operator!=(IDContainer const& other) const { return id != other.id; }
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__inline virtual bool operator<(IDContainer const& other) const { return id < other.id; }
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uint64_t id;
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};
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/**
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* An ID used for an Entity.
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* Is only guaranteed to be unique in the current scene (ie. a level change may also change the IDs of the entities within).
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*/
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struct EntityID : public IDContainer {
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/**
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* @return a new, unused Entity ID.
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*/
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static EntityID Generate();
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EntityID() = default;
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explicit EntityID(uint64_t v) : IDContainer(v) {}
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};
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/**
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* An ID used for a Component (a segment of data attached to an Entity).
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* Is only guaranteed to be unique in the current scene (ie. a level change may also change the IDs of the components within).
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*/
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struct ComponentID : public IDContainer {
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/**
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* @return a new, unused Component ID.
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*/
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static ComponentID Generate();
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ComponentID() = default;
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explicit ComponentID(uint64_t v) : IDContainer(v) {}
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};
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}
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