added Engine::Object::setGravityMode()

git-svn-id: svn://anubis/misc/OdeWorld@227 bd8a9e45-a331-0410-811e-c64571078777

OdeWorld.h

@@ -48,6 +48,13 @@ class OdeWorld
                 void setMass(dReal newmass);
                 void enableBody();
                 dBodyID getBody() { return m_body; }
+                void setGravityMode(bool enabled)
+                {
+                    if (m_body != 0)
+                    {
+                        dBodySetGravityMode(m_body, enabled);
+                    }
+                }
 
             protected:
                 bool    m_is_static;