From 762e33aab431eef632b733a10ebc5d5ff565b09d Mon Sep 17 00:00:00 2001
From: Lynix <lynix680@gmail.com>
Date: Thu, 11 Aug 2016 22:00:05 +0200
Subject: [PATCH] SDK/Entity: Add entity cloning

Former-commit-id: 6ba33c15d30cb9e385eaa2dd115e680962aad364 [formerly e5bf85dfef3def45ea47b9a8e46f2b5c61a6ca4f] [formerly aa4cd7ce6637f9559ede8530119d2d96b30a4b47 [formerly aa7c268cc1ed04a8e484b5a6317d967121939067]]
Former-commit-id: 24cf44420c029ec2ccc02f8b88873555af0aa88f [formerly efb642be02646b410003e5972c8494af773ef097]
Former-commit-id: 4d30a3ad59e3a30b0ff48eb984c20e3c098fbee1
---
 SDK/include/NDK/Entity.hpp |  2 ++
 SDK/include/NDK/World.hpp  |  2 ++
 SDK/src/NDK/Entity.cpp     |  8 ++++++++
 SDK/src/NDK/World.cpp      | 22 ++++++++++++++++++++++
 4 files changed, 34 insertions(+)

diff --git a/SDK/include/NDK/Entity.hpp b/SDK/include/NDK/Entity.hpp
index ae6b1acf5..33661eb50 100644
--- a/SDK/include/NDK/Entity.hpp
+++ b/SDK/include/NDK/Entity.hpp
@@ -34,6 +34,8 @@ namespace Ndk
 			BaseComponent& AddComponent(std::unique_ptr<BaseComponent>&& component);
 			template<typename ComponentType, typename... Args> ComponentType& AddComponent(Args&&... args);
 
+			const EntityHandle& Clone() const;
+
 			inline void Enable(bool enable);
 
 			inline BaseComponent& GetComponent(ComponentIndex index);
diff --git a/SDK/include/NDK/World.hpp b/SDK/include/NDK/World.hpp
index 40508e8e4..2e20d03a9 100644
--- a/SDK/include/NDK/World.hpp
+++ b/SDK/include/NDK/World.hpp
@@ -44,6 +44,8 @@ namespace Ndk
 
 			void Clear() noexcept;
 
+			const EntityHandle& CloneEntity(EntityId id);
+
 			const EntityHandle& GetEntity(EntityId id);
 			inline const EntityList& GetEntities();
 			inline BaseSystem& GetSystem(SystemIndex index);
diff --git a/SDK/src/NDK/Entity.cpp b/SDK/src/NDK/Entity.cpp
index 680ff56d9..ecd74ebc0 100644
--- a/SDK/src/NDK/Entity.cpp
+++ b/SDK/src/NDK/Entity.cpp
@@ -61,6 +61,14 @@ namespace Ndk
 		return component;
 	}
 
+	const EntityHandle& Entity::Clone() const
+	{
+		///DOC: The clone is enabled by default, even if the original entity is disabled
+		NazaraAssert(IsValid(), "Invalid entity");
+
+		return m_world->CloneEntity(m_id);
+	}
+
 	void Entity::Kill()
 	{
 		m_world->KillEntity(this);
diff --git a/SDK/src/NDK/World.cpp b/SDK/src/NDK/World.cpp
index e5b2d874a..8e5ff99f0 100644
--- a/SDK/src/NDK/World.cpp
+++ b/SDK/src/NDK/World.cpp
@@ -4,6 +4,7 @@
 
 #include <NDK/World.hpp>
 #include <Nazara/Core/Error.hpp>
+#include <NDK/BaseComponent.hpp>
 #include <NDK/Systems/PhysicsSystem.hpp>
 #include <NDK/Systems/VelocitySystem.hpp>
 
@@ -74,6 +75,27 @@ namespace Ndk
 		m_killedEntities.Clear();
 	}
 
+	const EntityHandle& World::CloneEntity(EntityId id)
+	{
+		EntityHandle original = GetEntity(id);
+		if (!original)
+		{
+			NazaraError("Invalid entity ID");
+			return EntityHandle::InvalidHandle;
+		}
+
+		EntityHandle clone = CreateEntity();
+
+		const Nz::Bitset<>& componentBits = original->GetComponentBits();
+		for (std::size_t i = componentBits.FindFirst(); i != componentBits.npos; i = componentBits.FindNext(i))
+		{
+			std::unique_ptr<BaseComponent> component(original->GetComponent(ComponentIndex(i)).Clone());
+			clone->AddComponent(std::move(component));
+		}
+
+		return GetEntity(clone->GetId());
+	}
+
 	void World::KillEntity(Entity* entity)
 	{
 		///DOC: Ignoré si l'entité est invalide