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physics/ODEContactConstraint

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00001 /* **-*-c++-*-**************************************************************
00002   Copyright (C)2003 David Jung <opensim@pobox.com>
00003 
00004   This program/file is free software; you can redistribute it and/or modify
00005   it under the terms of the GNU General Public License as published by
00006   the Free Software Foundation; either version 2 of the License, or
00007   (at your option) any later version.
00008   
00009   This program is distributed in the hope that it will be useful,
00010   but WITHOUT ANY WARRANTY; without even the implied warranty of
00011   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012   GNU General Public License for more details. (http://www.gnu.org)
00013   
00014   You should have received a copy of the GNU General Public License
00015   along with this program; if not, write to the Free Software
00016   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00017   
00018   $Id: ODEContactConstraint 1031 2004-02-11 20:46:36Z jungd $
00019   $Revision: 1.1 $
00020   $Date: 2004-02-11 15:46:36 -0500 (Wed, 11 Feb 2004) $
00021   $Author: jungd $
00022  
00023 ****************************************************************************/
00024 
00025 #ifndef _PHYSICS_ODECONTACTCONSTRAINT_
00026 #define _PHYSICS_ODECONTACTCONSTRAINT_
00027 
00028 #include <physics/physics>
00029 #include <physics/ODEConstraint>
00030 #include <physics/ContactConstraint>
00031 
00032 namespace physics {
00033 
00034 class ConstraintGroup;
00035 
00036 
00037 class ODEContactConstraint : virtual public ContactConstraint, public ODEConstraint
00038 {
00039 public:
00040   ODEContactConstraint(); 
00041   virtual ~ODEContactConstraint();
00042 
00043   virtual String className() const { return String("ODEContactConstraint"); }
00044 
00045   virtual void attach(ref<Body> body1, ref<Body> body2); ///< attach this constraint to two bodies
00046   virtual ref<Body>       getBody(Int index);            ///< get Body (index is 1 or 2); returns null if unattached
00047   virtual ref<const Body> getBody(Int index) const;
00048 
00049   virtual void setContactPosition(const Point3& pos);    ///< set contact point (in body1 frame)
00050   virtual void setContactNormal(const Vector3& normal);  ///< set contact normal (in body1 frame)
00051   virtual void setContactDepth(Real depth);              ///< set contact depth
00052  
00053   virtual void setParameter(const String& name, Real value, Int dof=1)
00054     { ODEConstraint::setParameter(name, value, dof); }
00055 
00056 protected:
00057   virtual void onConstraintGroupAdd(ref<ConstraintGroup> g); ///< called by ConstraintGroup::addConstraint()
00058 
00059   inline void checkAddedAndAttached() const
00060   {
00061     Assertm(!((body1 == 0) && (body2 == 0)), "ContactConstraint is attached to Bodies"); //!!! check cond.
00062     Assertm(group!=0,"ContactConstraint is member of ConstraintGroup");
00063   }
00064 
00065   ref<Body> body1;
00066   ref<Body> body2;
00067 
00068   bool addedToGroup;
00069   
00070   dContact oc;
00071   Point3 position;
00072   Vector3 normal;
00073   Real depth;
00074 };
00075 
00076 
00077 } // physics
00078 
00079 #endif

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