82 lines
2.9 KiB
C++
Executable File
82 lines
2.9 KiB
C++
Executable File
// EntityManager.h
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//
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// Mark Thompson mot20@cam.ac.uk / mark@wildfiregames.com
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//
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// Maintains entity id->object mappings. Does most of the work involved in creating an entity.
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//
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// Usage: Do not attempt to directly instantiate an entity class.
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// HEntity bob = g_EntityManager.create( unit_class_name, position, orientation );
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// or HEntity jim = g_EntityManager.create( pointer_to_unit_class, position, orientation );
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//
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// Perform updates on all world entities by g_EntityManager.updateAll( timestep )
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// Dispatch an identical message to all world entities by g_EntityManager.dispatchAll( message_pointer )
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// Get an STL vector container of all entities with a certain property with g_EntityManager.matches( predicate )
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// or just get all entities with g_EntityManager.getExtant().
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//
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// Those last two functions - caller has responsibility for deleting the collection when you're done with it.
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#ifndef ENTITY_MANAGER_INCLUDED
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#define ENTITY_MANAGER_INCLUDED
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#include "Singleton.h"
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#include "Entity.h"
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#include "EntityHandles.h"
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#include "EntityPredicate.h"
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#include "EntityMessage.h"
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#define MAX_HANDLES 4096
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#define g_EntityManager CEntityManager::GetSingleton()
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class CEntityManager : public Singleton<CEntityManager>
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{
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friend class HEntity;
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friend class CHandle;
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CHandle m_entities[MAX_HANDLES];
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std::vector<CEntity*> m_reaper;
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int m_nextalloc;
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static bool m_extant;
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void destroy( u16 handle );
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public:
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CEntityManager();
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~CEntityManager();
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HEntity create( CBaseEntity* base, CVector3D position, float orientation );
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HEntity create( CStrW templatename, CVector3D position, float orientation );
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HEntity* getByHandle( u16 index );
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void updateAll( size_t timestep );
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void interpolateAll( float relativeoffset );
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void InitializeAll();
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void TickAll();
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void renderAll();
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void deleteAll();
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// Predicate functions
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typedef bool (*EntityPredicate)( CEntity* target, void* userdata );
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template<EntityPredicate left, EntityPredicate right> static bool EntityPredicateLogicalOr( CEntity* target, void* userdata )
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{ return( left( target, userdata ) || right( target, userdata ) ); }
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template<EntityPredicate left, EntityPredicate right> static bool EntityPredicateLogicalAnd( CEntity* target, void* userdata )
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{ return( left( target, userdata ) && right( target, userdata ) ); }
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template<EntityPredicate operand> static bool EntityPredicateLogicalNot( CEntity* target, void* userdata )
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{ return( !operand( target, userdata ) ); }
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std::vector<HEntity>* matches( EntityPredicate predicate, void* userdata = NULL );
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std::vector<HEntity>* getExtant();
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void GetExtant( std::vector<CEntity*>& results ); // TODO: Switch most/all uses of getExtant() to this.
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static inline bool extant() // True if the singleton is actively maintaining handles. When false, system is shutting down, handles are quietly dumped.
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{
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return( m_extant );
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}
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};
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#endif
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