Update to box2d 2.4.1

src/libraries/box2d/b2_body.h

@@ -23,6 +23,7 @@
 #ifndef B2_BODY_H
 #define B2_BODY_H
 
+#include "b2_api.h"
 #include "b2_math.h"
 #include "b2_shape.h"
 
@@ -44,19 +45,15 @@ enum b2BodyType
 	b2_staticBody = 0,
 	b2_kinematicBody,
 	b2_dynamicBody
-
-	// TODO_ERIN
-	//b2_bulletBody,
 };
 
 /// A body definition holds all the data needed to construct a rigid body.
 /// You can safely re-use body definitions. Shapes are added to a body after construction.
-struct b2BodyDef
+struct B2_API b2BodyDef
 {
 	/// This constructor sets the body definition default values.
 	b2BodyDef()
 	{
-		userData = nullptr;
 		position.Set(0.0f, 0.0f);
 		angle = 0.0f;
 		linearVelocity.Set(0.0f, 0.0f);
@@ -121,14 +118,14 @@ struct b2BodyDef
 	bool enabled;
 
 	/// Use this to store application specific body data.
-	void* userData;
+	b2BodyUserData userData;
 
 	/// Scale the gravity applied to this body.
 	float gravityScale;
 };
 
 /// A rigid body. These are created via b2World::CreateBody.
-class b2Body
+class B2_API b2Body
 {
 public:
 	/// Creates a fixture and attach it to this body. Use this function if you need
@@ -379,10 +376,10 @@ public:
 	const b2Body* GetNext() const;
 
 	/// Get the user data pointer that was provided in the body definition.
-	void* GetUserData() const;
+	b2BodyUserData& GetUserData();
 
 	/// Set the user data. Use this to store your application specific data.
-	void SetUserData(void* data);
+	void SetUserData(b2BodyUserData& data);
 
 	/// Get the parent world of this body.
 	b2World* GetWorld();
@@ -398,7 +395,7 @@ private:
 	friend class b2ContactManager;
 	friend class b2ContactSolver;
 	friend class b2Contact;
-	
+
 	friend class b2DistanceJoint;
 	friend class b2FrictionJoint;
 	friend class b2GearJoint;
@@ -471,7 +468,7 @@ private:
 
 	float m_sleepTime;
 
-	void* m_userData;
+	b2BodyUserData m_userData;
 };
 
 inline b2BodyType b2Body::GetType() const
@@ -734,16 +731,16 @@ inline const b2Body* b2Body::GetNext() const
 	return m_next;
 }
 
-inline void b2Body::SetUserData(void* data)
-{
-	m_userData = data;
-}
-
-inline void* b2Body::GetUserData() const
+inline b2BodyUserData& b2Body::GetUserData()
 {
 	return m_userData;
 }
 
+inline void b2Body::SetUserData(b2BodyUserData& userData)
+{
+	m_userData = userData;
+}
+
 inline void b2Body::ApplyForce(const b2Vec2& force, const b2Vec2& point, bool wake)
 {
 	if (m_type != b2_dynamicBody)