diff --git a/src/Vector.cpp b/src/Vector.cpp
index c656c21..767d55d 100644
--- a/src/Vector.cpp
+++ b/src/Vector.cpp
@@ -1,8 +1,13 @@
 #include "Vector.h"
+#include <math.h>
 
 Vector::Vector(float x, float y) {
   this->x=x;
   this->y=y;
 }
 
-Vector::Vector() {}
\ No newline at end of file
+Vector::Vector() {}
+
+int Vector::distanceTo(Vector vec) {
+  return sqrt(pow(abs(x - vec.x),2)+pow(abs(y - vec.y),2));
+}
\ No newline at end of file
diff --git a/src/Vector.h b/src/Vector.h
index e6b5a54..533477e 100644
--- a/src/Vector.h
+++ b/src/Vector.h
@@ -5,5 +5,6 @@ class Vector {
   float x,y;
   Vector();
   Vector(float x, float y);
+  int distanceTo(Vector vec);
 };
 #endif
\ No newline at end of file
diff --git a/src/phys_obj.cpp b/src/phys_obj.cpp
index 5347099..89871ad 100644
--- a/src/phys_obj.cpp
+++ b/src/phys_obj.cpp
@@ -1,29 +1,54 @@
 #include "phys_obj.h"
 
-#ifndef PI
-#define PI 3.14159265359
-#endif
-
+/*
 phys_obj::phys_obj(Quad object, Vector init_vel) {
   this->obj=object;
   this->velocity=init_vel;
   this->bounds=BoundingBox(object);
-}
+}*/
 void phys_obj::force(Vector vec) {
   this->velocity.x += vec.x;
   this->velocity.y += vec.y;
 }
 void phys_obj::render(SDL_Renderer *rend) {
+  /*
+  if(obj.isInitialized()) {
+    if(circle.isInitialized()) {
+      circle.render(rend);
+    } else {
+      fprintf(stderr,"[ERROR] Could not render object");
+    }
+  } else {
+    obj.render(rend);
+  }*/
   obj.render(rend);
-  bounds.render(rend);
+}
+
+phys_obj::phys_obj(Circle c, Vector init_vel) {
+  this->obj = c;
+  this->velocity = init_vel;
+}
+
+phys_obj::phys_obj(Circle c) {
+  this->obj = c;
+  this->velocity = Vector(0,0);
 }
 
 void phys_obj::translate(Vector vec) {
   obj.translate(vec);
-  bounds.update();
+  //bounds.update();
+}
+
+int phys_obj::distanceTo(Circle c) {
+  return obj.center.distanceTo(c.center);
 }
 
 bool phys_obj::checkCollision(phys_obj o) {
+  if(distanceTo(o.obj) <= obj.radius) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 void phys_obj::calculate_vectors(std::vector<phys_obj> objects) {
diff --git a/src/phys_obj.h b/src/phys_obj.h
index 7048a31..5371ea6 100644
--- a/src/phys_obj.h
+++ b/src/phys_obj.h
@@ -1,15 +1,22 @@
 #include "BoundingBox.h"
+#include "Circle.h"
 #include <vector>
 
 class phys_obj {
   public:
   Vector velocity;
-  Quad obj;
+  //Quad obj;
+  Circle obj;
   BoundingBox bounds;
-  phys_obj(Quad object, Vector init_vel);
+  phys_obj();
+  //phys_obj(Quad object);
+  //phys_obj(Quad object, Vector init_vel);
+  phys_obj(Circle c);
+  phys_obj(Circle c, Vector init_vel);
   void force(Vector vec);
   void render(SDL_Renderer *rend);
   static void calculate_vectors(std::vector<phys_obj> objects);
   void translate(Vector vec);
   bool checkCollision(phys_obj o);
+  int distanceTo(Circle c);
 };
\ No newline at end of file