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This represents UE4/Main @18073326, Release-5.0 @18081140 and Dev-PerfTest @18045971 [CL 18081471 by aurel cordonnier in ue5-release-engine-test branch]
103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreTypes.h"
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#include "EntitySystem/MovieSceneEntitySystemTypes.h"
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namespace UE
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{
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namespace MovieScene
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{
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struct FEntityAllocation;
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class FEntityManager;
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struct FEntityAllocationIterator;
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using FEntityAllocationIteratorItem = FEntityAllocationProxy;
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/**
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* Object that iterates all entity allocations that match a specific filter
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*/
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struct MOVIESCENE_API FEntityAllocationIterator
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{
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/**
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* End iterator constructor
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*/
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explicit FEntityAllocationIterator(const FEntityManager* InManager);
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/**
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* Construction from the entity manager to iterate, and a filter
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*
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* @param InManager The entity manager to iterate
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* @param InFilter Filter that defines the components to match. Copied into this object.
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*/
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explicit FEntityAllocationIterator(const FEntityManager* InManager, const FEntityComponentFilter* InFilter);
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FEntityAllocationIterator(FEntityAllocationIterator&&);
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FEntityAllocationIterator& operator=(FEntityAllocationIterator&&);
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/**
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* Destructor
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*/
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~FEntityAllocationIterator();
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/**
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* Retrieve the entity allocation that this iterator represents. Only valid if this iterator != end()
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*/
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FEntityAllocationIteratorItem operator*() const;
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/**
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* Increment this iterator to the next matching allocation. Only valid if this iterator != end()
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*/
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FEntityAllocationIterator& operator++();
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/**
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* Test whether this iterator is valid (ie not at the end of the iteration)
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*/
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bool operator!=(const FEntityAllocationIterator& Other) const;
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private:
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/**
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* Find the index of the next allocation that matches our filter
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*/
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int32 FindMatchingAllocationStartingAt(int32 Index) const;
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/** Filter to match entity allocations against */
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const FEntityComponentFilter* Filter;
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/** Entity manager being iterated */
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const FEntityManager* Manager;
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/** Current allocation index or Manager->EntityAllocationMasks.GetMaxIndex() when finished */
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int32 AllocationIndex;
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};
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/**
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* Iterator proxy type returned from FEntityManager::Iterate that supports ranged-for iteration of all entity allocations matching the specified filter
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*/
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struct FEntityAllocationIteratorProxy
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{
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FEntityAllocationIteratorProxy(const FEntityManager* InManager, const FEntityComponentFilter* InFilter)
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: Manager(InManager), Filter(InFilter)
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{}
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/**~ Do not use directly - for stl iteration */
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FEntityAllocationIterator begin() const { return FEntityAllocationIterator(Manager, Filter); }
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FEntityAllocationIterator end() const { return FEntityAllocationIterator(Manager); }
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private:
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const FEntityManager* Manager;
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const FEntityComponentFilter* Filter;
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};
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} // namespace MovieScene
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} // namespace UE
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