#include "config.h"
#include "joint.h"

class World {
private:
	static float gravity;
	static float elasticity;
	static float friction;
	static float width;
	static float height;
	static float spring_k;
	static float mass;

	static int	 copy_joints;
	static Joint **copy;
	static Joint **structure;
	static int   joints;
	static int	 maxjoints;
	static int	 joint_offset;

public:
	static float Gravity() 			{ return gravity; 			}
	static float Gravity(float g)	{ return joint_offset ? gravity : gravity=Joint::Gravity(g); }
	static float Elasticity()		{ return elasticity;		}
	static float Elasticity(float e){ return joint_offset ? elasticity : elasticity=e;		}
	static float Friction()			{ return friction;			}
	static float Friction(float f)	{ return friction=f;		}
	static float Width()			{ return width;				}
	static float Width(float w)		{ return width=Joint::WorldWidth(w);}
	static float Height()			{ return height;			}
	static float Height(float h)	{ return height=h;			}
	static float SpringK()			{ return spring_k;			}
	static float SpringK(float k)	{ return joint_offset ? spring_k : spring_k=Spring::K(k);	}
	static float Mass()				{ return mass;			}
	static float Mass(float m)		{ return joint_offset ? mass : mass=Joint::Mass(m);	}
	static int	 Joints()			{ return joints;			}
	static Joint *Joints(int i)		{ return structure[i];		}
	static int	 MaxJoints()		{ return maxjoints;			}

	static void InitJoints(int count);
	static void AddJoint(float nx, float ny, int fixed);
	static void RemoveJoint(int joint);
	static void AddSpring(int from, int to);
	static void AddMuscle(int from, int to, float freq, float amp, float ofs);
	static void Load(const char *filename);
	static void Include(const char *filename);
	static void Save(const char *filename);
};