Adding math to yage

1 files changed, 20 insertions, 14 deletions

diff --git a/include/YAGE/Physics/body.hpp b/include/YAGE/Physics/body.hpp
index c781e1d4..54fdeb3f 100644
--- a/include/YAGE/Physics/body.hpp
+++ b/include/YAGE/Physics/body.hpp
@@ -8,25 +8,28 @@ namespace yage
 
 class Body
 {
+public:
+	// gravity constant
+	static const double GRAVITY;	
 protected:
-	// current force acting on object
-	glm::vec2 force_;
-
-	// current acceleration
-	glm::vec2 acceleration_=glm::vec2(0.f, 0.f);
-	
-	// current velocity of the object
-	glm::vec2 velocity_;
-
 	// center of mass of the object
-    glm::vec2 center_of_mass_;
+	glm::vec2 position_=glm::vec2(0.f, 0.f);
 
 	// mass of the object
-    double mass_;
+    double mass_=1.0;
+	
+	// current velocity of the object
+	glm::vec2 velocity_=glm::vec2(0.f, 0.f);
 
 	// boolean that defines if gravity can act on the object
-	bool gravity_;
-    
+	bool gravity_=true;
+	
+	// current acceleration
+	glm::vec2 acceleration_=glm::vec2(0.f, 0.f);
+
+	// force acting on the body
+	glm::vec2 force_=glm::vec2(0.f, 0.f);
+	
 public:
 	virtual ~Body();
 
@@ -38,7 +41,10 @@ public:
 	float yPosition() const;
 protected:
 	// protected constructor to initialize member variables
-	Body(const glm::vec2 &center_of_mass, double mass, const glm::vec2 &force, const glm::vec2 &velocity, bool gravity);
+	Body(const glm::vec2 &position=glm::vec2(0.f, 0.f),
+	     double mass=1.0,
+	     const glm::vec2 &velocity=glm::vec2(0.f, 0.f),
+	     bool gravity=false);
 };
 
 } // yage