public BodyDef(byte init)
{
MassData = new MassData();
MassData.Center = Vector2.zero;
MassData.Mass = 0.0f;
MassData.I = 0.0f;
UserData = null;
Position = Vector2.zero;
Angle = 0.0f;
LinearVelocity = Vector2.zero;
AngularVelocity = 0.0f;
LinearDamping = 0.0f;
AngularDamping = 0.0f;
AllowSleep = true;
IsSleeping = false;
FixedRotation = false;
IsBullet = false;
}