feat: new clone registry core function (#269)

ecsact-dev · Dec 5, 2024 · 732177c · 732177c
1 parent d7de0cc
commit 732177c
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Showing 2 changed files with 18 additions and 0 deletions.
diff --git a/ecsact/runtime/core.h b/ecsact/runtime/core.h
@@ -50,6 +50,16 @@ ECSACT_CORE_API_FN(void, ecsact_destroy_registry)
 	ecsact_registry_id registry
 );
 
+/**
+ * Creates a new registry from an existing one with all its entities and
+ * components intact.
+ */
+ECSACT_CORE_API_FN(ecsact_registry_id, ecsact_clone_registry)
+( //
+	ecsact_registry_id registry,
+	const char*        registry_name
+);
+
 /**
  * Destroy all entities
  */
@@ -296,6 +306,7 @@ ECSACT_CORE_API_FN(ecsact_stream_error, ecsact_stream)
 #	define FOR_EACH_ECSACT_CORE_API_FN(fn, ...)           \
 		fn(ecsact_create_registry, __VA_ARGS__);             \
 		fn(ecsact_destroy_registry, __VA_ARGS__);            \
+		fn(ecsact_clone_registry, __VA_ARGS__);              \
 		fn(ecsact_clear_registry, __VA_ARGS__);              \
 		fn(ecsact_create_entity, __VA_ARGS__);               \
 		fn(ecsact_ensure_entity, __VA_ARGS__);               \

diff --git a/ecsact/runtime/core.hh b/ecsact/runtime/core.hh
@@ -635,6 +635,13 @@ public:
 		return ecsact_create_entity(_id);
 	}
 
+	ECSACT_ALWAYS_INLINE auto clone(const char* name) const -> registry {
+		auto cloned_registry_id = ecsact_clone_registry(_id, name);
+		auto cloned_registry = registry{cloned_registry_id};
+		cloned_registry._owned = true;
+		return cloned_registry;
+	}
+
 	template<typename Component, typename... AssocFields>
 		requires(!std::is_empty_v<Component>)
 	ECSACT_ALWAYS_INLINE auto get_component( //