ComponentRegistry.h File Reference

#include "World.h"
#include "ComponentDefinition.h"
#include <functional>
#include <iostream>

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Macros
#define	AUTO_REGISTER_COMPONENT(ComponentType)
	Macro for auto-registering a component at program startup Place this immediately after the struct definition.

Functions
template<typename T >
bool	InstantiateComponentGeneric (EntityID entity, const ComponentDefinition &def)
	Generic template function for instantiating any ECS component This handles the common case: create component if missing, get reference Specialized behavior can still use custom InstantiateXYZ() functions.

Macro Definition Documentation

AUTO_REGISTER_COMPONENT

#define AUTO_REGISTER_COMPONENT

(

ComponentType

)

Value:

    namespace { \
        struct ComponentRegistrar_##ComponentType { \
            ComponentRegistrar_##ComponentType(); \
        }; \
        static ComponentRegistrar_##ComponentType g_registrar_##ComponentType; \
    } \
    inline ComponentRegistrar_##ComponentType::ComponentRegistrar_##ComponentType() { \
        extern void RegisterComponentFactory_Internal(const char*, std::function<bool(EntityID, const ComponentDefinition&)>); \
        RegisterComponentFactory_Internal( \
            #ComponentType, \
            [](EntityID entity, const ComponentDefinition& def) { \
                return InstantiateComponentGeneric<ComponentType>(entity, def); \
            } \
        ); \
    }

Macro for auto-registering a component at program startup Place this immediately after the struct definition.

Example: struct Position_data { Vector position; }; AUTO_REGISTER_COMPONENT(Position_data);

This creates a static dummy variable whose constructor executes before main()

Definition at line 76 of file ComponentRegistry.h.

Function Documentation

InstantiateComponentGeneric()

template<typename T >

bool InstantiateComponentGeneric	(	EntityID	entity,
		const ComponentDefinition &	def
	)

Generic template function for instantiating any ECS component This handles the common case: create component if missing, get reference Specialized behavior can still use custom InstantiateXYZ() functions.

Returns

true if component was created successfully, false otherwise Note: Currently always returns true for generic components. Custom factory functions can return false to indicate failure.

Definition at line 47 of file ComponentRegistry.h.

References World::AddComponent(), World::Get(), World::GetComponent(), and GetComponentTypeID_Static().

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