2 files changed, 39 insertions, 2 deletions
diff --git a/src/physics.cpp b/src/physics.cpp
index b8d4e29..fa9bc38 100644
--- a/src/physics.cpp
+++ b/src/physics.cpp
@@ -10,9 +10,28 @@ namespace Physics {
 	//force = s_mass * grav
 	//force = s_mass * (grav_const * (r_mass / distance^2))
 
+    std::unordered_set<DynamicBody*>DynamicBody::dynamicBodies;
+    std::unordered_set<KinematicBody*>KinematicBody::kinematicBodies;
+
 	Body::Body(Vector2 position, Vector2 velocity, float mass):position(position), velocity(velocity), mass(mass) {
 	}
 
+	DynamicBody::DynamicBody(Vector2 position, Vector2 velocity, float mass):Body(position, velocity, mass) {
+        dynamicBodies.insert(this);
+	}
+
+    DynamicBody::~DynamicBody() {
+        dynamicBodies.erase(this);
+    }
+
+	KinematicBody::KinematicBody(Vector2 position, Vector2 velocity, float mass):Body(position, velocity, mass) {
+        kinematicBodies.insert(this);
+	}
+
+    KinematicBody::~KinematicBody() {
+        kinematicBodies.erase(this);
+    }
+
 	Body ship = Body((Vector2){200,400}, (Vector2){0,0.5}, 1);
 	Body rock = Body((Vector2){400,400}, (Vector2){0,0}, 50);
 
diff --git a/src/physics.hpp b/src/physics.hpp
index e26df15..de6172a 100644
--- a/src/physics.hpp
+++ b/src/physics.hpp
@@ -1,8 +1,8 @@
 #pragma once
+#include <unordered_set>
 #include "raylib.h"
 
 namespace Physics {
-
 	class Body {
 		public:
 			Vector2 position;
@@ -11,10 +11,28 @@ namespace Physics {
 			Body(Vector2 position, Vector2 velocity, float mass);
 	};
 
+    // TODO: replace these hardcoded bodies with dynamic/kinematic bodies in gameplay system
 	extern Body ship;// = Body((Vector2){50,50}, (Vector2){0,1}, 1);
 	extern Body rock;// = Body((Vector2){400,400}, (Vector2){0,0}, 50);
 
+    class DynamicBody : public Body {
+        private:
+            static std::unordered_set<DynamicBody*> dynamicBodies;
+        public:
+            void apply_force(Vector2 force);
+            DynamicBody(Vector2 position, Vector2 velocity, float mass);
+            ~DynamicBody();
+    };
+
+    class KinematicBody : public Body {
+        private:
+            static std::unordered_set<KinematicBody*> kinematicBodies;
+        public:
+            KinematicBody(Vector2 position, Vector2 velocity, float mass);
+            ~KinematicBody();
+    };
+
 	//0.01667
-	void step(float deltaTime);
+	void step(float deltaTime, int times=1);
     Vector2 get_grav_force(Body body1, Body body2);
 }