get chunk

Ubpa · Mar 23, 2021 · cf31e78 · cf31e78
1 parent 1148ac1
commit cf31e78
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diff --git a/include/UECS/EntityMngr.hpp b/include/UECS/EntityMngr.hpp
@@ -55,6 +55,9 @@ namespace Ubpa::UECS {
 		std::vector<CmptAccessPtr> Components(Entity, AccessMode) const;
 		std::vector<CmptAccessPtr> WriteComponents(Entity e) const { return Components(e, AccessMode::WRITE); }
 		std::vector<CmptAccessPtr> ReadComponents(Entity e) const { return Components(e, AccessMode::LATEST); }
+
+		// chunk + index in chunk
+		std::tuple<Chunk*, std::size_t> GetChunk(Entity e) const;
 
 		bool Exist(Entity) const noexcept;
 

diff --git a/src/core/EntityMngr.cpp b/src/core/EntityMngr.cpp
@@ -622,3 +622,9 @@ void EntityMngr::NewFrame() noexcept {
 	for (auto& [ts, a] : ts2a)
 		a->NewFrame();
 }
+
+std::tuple<Chunk*, std::size_t> EntityMngr::GetChunk(Entity e) const {
+	if(!Exist(e)) throw std::invalid_argument("Entity is invalid");
+	const auto& info = entityTable[e.index];
+	return { info.archetype->GetChunks()[info.chunkIdx],info.idxInChunk };
+}