More progess on chunk system

src/engine/tree/Chunk.cpp

@@ -4,6 +4,8 @@
 
 #include "Chunk.hpp"
 
+#include "engine/math/intersections.hpp"
+#include "engine/primitives/boxes/AxisAlignedBoundingCube.hpp"
 #include "engine/utils.hpp"
 
 namespace fgl::engine::tree
@@ -18,9 +20,34 @@ namespace fgl::engine::tree
 		return chunk;
 	}
 
+	void ChunkManager::cleanup()
+	{
+		std::lock_guard guard { m_delete_mtx };
+		while ( m_delete_list.size() > 0 )
+		{
+			const auto item { m_delete_list.front() };
+			m_delete_list.pop();
+
+			auto itter { m_chunks.find( item->getID() ) };
+
+			m_chunks.erase( itter );
+		}
+	}
+
 	std::shared_ptr< Chunk > ChunkManager::getChunk( const ChunkID id )
 	{}
 
+	void ChunkManager::markForDeletion( std::shared_ptr< Chunk >& chunk )
+	{
+		m_delete_list.push( chunk );
+	}
+
+	ChunkManager& ChunkManager::getInstance()
+	{
+		static ChunkManager manager {};
+		return manager;
+	}
+
 	ChunkID getID( const glm::vec3 point )
 	{
 		// the inital chunk starts at 0,0,0. meaning that the bounds of the inital chunk goes from
@@ -41,7 +68,30 @@ namespace fgl::engine::tree
 		return hash;
 	}
 
+	std::shared_ptr< Chunk > Chunk::getShared()
+	{
+		return shared_from_this();
+	}
+
 	Chunk::Chunk( const ChunkID id ) : m_id( id ), m_center( getPosition( id ) )
 	{}
 
+	ChunkID Chunk::getID() const
+	{
+		return m_id;
+	}
+
+	bool Chunk::isVisible( const Frustum& frustum ) const
+	{
+		// Create a bounding box of this chunk
+		const AxisAlignedBoundingCube< CS::World > bounds { WorldCoordinate( m_center ), CHUNK_HALF };
+
+		return intersects( frustum, bounds );
+	}
+
+	void Chunk::deleteLater()
+	{
+		ChunkManager::getInstance()->markForDeletion( this->getShared() );
+	}
+
 } // namespace fgl::engine::tree

src/engine/tree/Chunk.hpp

@@ -8,7 +8,6 @@
 #include <unordered_map>
 
 #include "engine/gameobjects/GameObject.hpp"
-#include "glm/vec3.hpp"
 
 namespace fgl::engine
 {
@@ -24,21 +23,28 @@ namespace fgl::engine::tree
 	class ChunkManager
 	{
 		std::unordered_map< ChunkID, std::shared_ptr< Chunk > > m_chunks {};
+		std::mutex m_delete_mtx;
 		std::queue< std::shared_ptr< Chunk > > m_delete_list {};
 
-		std::shared_ptr< Chunk > createChunk( const ChunkID id );
+		std::shared_ptr< Chunk > createChunk( ChunkID id );
 
 		//! Deletes any chunks pending deletion
 		void cleanup();
 
 		//! Returns a shared pointer to the chunk with the given ID.
-		std::shared_ptr< Chunk > getChunk( const ChunkID id );
+		std::shared_ptr< Chunk > getChunk( ChunkID id );
+
+	  public:
+
+		void markForDeletion( std::shared_ptr< Chunk >& chunk );
+
+		static ChunkManager& getInstance();
 	};
 
 	ChunkID getID( const glm::vec3 point );
 	glm::vec3 getPosition( const ChunkID id );
 
-	class Chunk
+	class Chunk : public std::enable_shared_from_this< Chunk >
 	{
 		//! Determines if the chunk is active to the rendering system
 		bool m_rendering_active { true };
@@ -49,11 +55,15 @@ namespace fgl::engine::tree
 		//! Contains a list of all objects within this chunk
 		std::unordered_map< GameObject::GameObjectID, std::shared_ptr< GameObject > > m_objects {};
 
+		std::shared_ptr< Chunk > getShared();
+
 	  public:
 
 		Chunk() = delete;
 		Chunk( const ChunkID id );
 
+		ChunkID getID() const;
+
 		void addGameObject( std::shared_ptr< GameObject > object );
 
 		// Size of a chunk from center to
@@ -65,6 +75,9 @@ namespace fgl::engine::tree
 
 		//! Returns true if the bounds of this chunk are visible.
 		bool isVisible( const Frustum& frustum ) const;
+
+		//! Marks this node to be deleted later
+		void deleteLater();
 	};
 
 } // namespace fgl::engine::tree