Update ContactList & FixtureList

src/kiwano-physics/Contact.h

@@ -146,42 +146,223 @@ namespace kiwano
 		class ContactList
 			: public List<Contact>
 		{
+			template <typename _Ty>
+			class IteratorImpl
+				: public std::iterator<std::forward_iterator_tag, _Ty>
+			{
+				using herit = std::iterator<std::forward_iterator_tag, _Ty>;
+
 			public:
-			ContactList()
+				IteratorImpl(const _Ty& elem)
+					: elem_(elem)
 				{
 				}
 
-			ContactList(const Contact& first)
+				inline typename herit::reference operator*() const
 				{
-				Contact current = first;
+					return const_cast<typename herit::reference>(elem_);
-				while (current.GetB2Contact())
+				}
+
+				inline typename herit::pointer operator->() const
 				{
-					push_back(current);
+					return std::pointer_traits<typename herit::pointer>::pointer_to(**this);
-					current = current.GetB2Contact()->GetNext();
 				}
+
+				inline IteratorImpl& operator++()
+				{
+					elem_ = elem_.GetB2Contact()->GetNext();
+					return *this;
 				}
+
+				inline IteratorImpl operator++(int)
+				{
+					IteratorImpl old = *this;
+					operator++();
+					return old;
+				}
+
+				inline bool operator== (const IteratorImpl& rhs) const
+				{
+					return elem_.GetB2Contact() == rhs.elem_.GetB2Contact();
+				}
+
+				inline bool operator!= (const IteratorImpl& rhs) const
+				{
+					return !operator==(rhs);
+				}
+
+			private:
+				_Ty elem_;
 			};
 
+		public:
+			using value_type		= Contact;
+			using iterator			= IteratorImpl<value_type>;
+			using const_iterator	= IteratorImpl<const value_type>;
+
+			inline ContactList()
+			{
+			}
+
+			inline ContactList(const value_type& first)
+				: first_(first)
+			{
+			}
+
+			inline const value_type& front() const
+			{
+				return first_;
+			}
+
+			inline value_type& front()
+			{
+				return first_;
+			}
+
+			inline iterator begin()
+			{
+				return iterator(first_);
+			}
+
+			inline const_iterator begin() const
+			{
+				return cbegin();
+			}
+
+			inline const_iterator cbegin() const
+			{
+				return const_iterator(first_);
+			}
+
+			inline iterator end()
+			{
+				return iterator(nullptr);
+			}
+
+			inline const_iterator end() const
+			{
+				return cend();
+			}
+
+			inline const_iterator cend() const
+			{
+				return const_iterator(nullptr);
+			}
+
+		private:
+			value_type first_;
+		};
 
 		/// \~chinese
 		/// @brief 物理接触边列表
 		class ContactEdgeList
-			: public List<ContactEdge>
 		{
+			template <typename _Ty>
+			class IteratorImpl
+				: public std::iterator<std::forward_iterator_tag, _Ty>
+			{
+				using herit = std::iterator<std::forward_iterator_tag, _Ty>;
+
 			public:
-			ContactEdgeList()
+
+				inline IteratorImpl(const _Ty& elem)
+					: elem_(elem)
 				{
 				}
 
-			ContactEdgeList(const ContactEdge& first)
+				inline typename herit::reference operator*() const
 				{
-				ContactEdge current = first;
+					return const_cast<typename herit::reference>(elem_);
-				while (current.GetB2ContactEdge())
+				}
+
+				inline typename herit::pointer operator->() const
 				{
-					push_back(current);
+					return std::pointer_traits<typename herit::pointer>::pointer_to(**this);
-					current = current.GetB2ContactEdge()->next;
 				}
+
+				inline IteratorImpl& operator++()
+				{
+					elem_ = elem_.GetB2ContactEdge()->next;
+					return *this;
 				}
+
+				inline IteratorImpl operator++(int)
+				{
+					IteratorImpl old = *this;
+					operator++();
+					return old;
+				}
+
+				inline bool operator== (const IteratorImpl& rhs) const
+				{
+					return elem_.GetB2ContactEdge() == rhs.elem_.GetB2ContactEdge();
+				}
+
+				inline bool operator!= (const IteratorImpl& rhs) const
+				{
+					return !operator==(rhs);
+				}
+
+			private:
+				_Ty elem_;
+			};
+
+		public:
+			using value_type		= ContactEdge;
+			using iterator			= IteratorImpl<value_type>;
+			using const_iterator	= IteratorImpl<const value_type>;
+
+			inline ContactEdgeList()
+			{
+			}
+
+			inline ContactEdgeList(const value_type& first)
+				: first_(first)
+			{
+			}
+
+			inline const value_type& front() const
+			{
+				return first_;
+			}
+
+			inline value_type& front()
+			{
+				return first_;
+			}
+
+			inline iterator begin()
+			{
+				return iterator(first_);
+			}
+
+			inline const_iterator begin() const
+			{
+				return cbegin();
+			}
+
+			inline const_iterator cbegin() const
+			{
+				return const_iterator(first_);
+			}
+
+			inline iterator end()
+			{
+				return iterator(nullptr);
+			}
+
+			inline const_iterator end() const
+			{
+				return cend();
+			}
+
+			inline const_iterator cend() const
+			{
+				return const_iterator(nullptr);
+			}
+
+		private:
+			value_type first_;
 		};
 
 		/** @} */

src/kiwano-physics/Fixture.h

@@ -126,20 +126,111 @@ namespace kiwano
 		class FixtureList
 			: public List<Fixture>
 		{
+			template <typename _Ty>
+			class IteratorImpl
+				: public std::iterator<std::forward_iterator_tag, _Ty>
+			{
+				using herit = std::iterator<std::forward_iterator_tag, _Ty>;
+
 			public:
-			FixtureList()
+				IteratorImpl(const _Ty& elem)
+					: elem_(elem)
 				{
 				}
 
-			FixtureList(const Fixture& first)
+				inline typename herit::reference operator*() const
 				{
-				Fixture current = first;
+					return const_cast<typename herit::reference>(elem_);
-				while (current.GetB2Fixture())
+				}
+
+				inline typename herit::pointer operator->() const
 				{
-					push_back(current);
+					return std::pointer_traits<typename herit::pointer>::pointer_to(**this);
-					current = current.GetB2Fixture()->GetNext();
 				}
+
+				inline IteratorImpl& operator++()
+				{
+					elem_ = elem_.GetB2Contact()->GetNext();
+					return *this;
 				}
+
+				inline IteratorImpl operator++(int)
+				{
+					IteratorImpl old = *this;
+					operator++();
+					return old;
+				}
+
+				inline bool operator== (const IteratorImpl& rhs) const
+				{
+					return elem_.GetB2Contact() == rhs.elem_.GetB2Contact();
+				}
+
+				inline bool operator!= (const IteratorImpl& rhs) const
+				{
+					return !operator==(rhs);
+				}
+
+			private:
+				_Ty elem_;
+			};
+
+		public:
+			using value_type		= Fixture;
+			using iterator			= IteratorImpl<value_type>;
+			using const_iterator	= IteratorImpl<const value_type>;
+
+			inline FixtureList()
+			{
+			}
+
+			inline FixtureList(const value_type& first)
+				: first_(first)
+			{
+			}
+
+			inline const value_type& front() const
+			{
+				return first_;
+			}
+
+			inline value_type& front()
+			{
+				return first_;
+			}
+
+			inline iterator begin()
+			{
+				return iterator(first_);
+			}
+
+			inline const_iterator begin() const
+			{
+				return cbegin();
+			}
+
+			inline const_iterator cbegin() const
+			{
+				return const_iterator(first_);
+			}
+
+			inline iterator end()
+			{
+				return iterator(nullptr);
+			}
+
+			inline const_iterator end() const
+			{
+				return cend();
+			}
+
+			inline const_iterator cend() const
+			{
+				return const_iterator(nullptr);
+			}
+
+		private:
+			value_type first_;
 		};
 
 		/** @} */

src/kiwano-physics/World.cpp

@@ -225,6 +225,11 @@ namespace kiwano
 			world_.SetGravity(b2Vec2(gravity.x, gravity.y));
 		}
 
+		ContactList World::GetContactList()
+		{
+			return ContactList(Contact(world_.GetContactList()));
+		}
+
 		void World::Update(Duration dt)
 		{
 			world_.Step(dt.Seconds(), vel_iter_, pos_iter_);

src/kiwano-physics/World.h

@@ -61,6 +61,10 @@ namespace kiwano
 			/// @brief 设置重力 [N]
 			void SetGravity(Vec2 gravity);
 
+			/// \~chinese
+			/// @brief 获取物理接触列表
+			ContactList GetContactList();
+
 			/// \~chinese
 			/// @brief 获取全局缩放比例
 			/// @details 缩放比例是指由物理世界的单位米转换到屏幕像素的比例，默认比例为1:100