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00001 /* ****************************************************************** **
00002 **    OpenSees - Open System for Earthquake Engineering Simulation    **
00003 **          Pacific Earthquake Engineering Research Center            **
00004 **                                                                    **
00005 **                                                                    **
00006 ** (C) Copyright 1999, The Regents of the University of California    **
00007 ** All Rights Reserved.                                               **
00008 **                                                                    **
00009 ** Commercial use of this program without express permission of the   **
00010 ** University of California, Berkeley, is strictly prohibited.  See   **
00011 ** file 'COPYRIGHT'  in main directory for information on usage and   **
00012 ** redistribution,  and for a DISCLAIMER OF ALL WARRANTIES.           **
00013 **                                                                    **
00014 ** Developed by:                                                      **
00015 **   Frank McKenna (fmckenna@ce.berkeley.edu)                         **
00016 **   Gregory L. Fenves (fenves@ce.berkeley.edu)                       **
00017 **   Filip C. Filippou (filippou@ce.berkeley.edu)                     **
00018 **                                                                    **
00019 ** ****************************************************************** */
00020                                                                         
00021 // $Revision: 1.1.1.1 $
00022 // $Date: 2000/09/15 08:23:18 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/domain/constraints/MP_Constraint.h,v $
00024                                                                         
00025                                                                         
00026 #ifndef MP_Constraint_h
00027 #define MP_Constraint_h
00028 
00029 // File: ~/domain/constraints/MP_Constraint.h
00030 //
00031 // Written: fmk 
00032 // Created: 11/96
00033 // Revision: A
00034 //
00035 // Purpose: This file contains the class definition for MP_Constraint.
00036 // MP_Constraint is a class which stores the information for a multi
00037 // point constraint. A multipoint constraint relates certain dof at 
00038 // a constrained node to be related to certain dof at a retained node: 
00039 //                      {Uc} = [Ccr] {Ur}
00040 //
00041 // The MP_Constraint class assumes time invariant constraints, i.e. the
00042 // constraint matrix does not change over time. All the methods are declared
00043 // as pure virtual, which will allow subclasses for time varying constraints.
00044 //
00045 // What: "@(#) MP_Constraint, revA"
00046 
00047 #include <DomainComponent.h>
00048 #include <bool.h>
00049 
00050 #include <iostream.h>
00051 
00052 #include <Matrix.h>
00053 #include <ID.h>
00054 
00090 class MP_Constraint : public DomainComponent
00091 {
00092   public:
00094     MP_Constraint(int classTag);
00095 
00097     MP_Constraint(int tag,
00098 
00099     int nodeRetain, 
00100     int nodeConstr, 
00101     ID &constrainedDOF,
00102         ID &retainedDOF,
00103     int classTag);    
00104 
00106     MP_Constraint(int tag,
00107     int nodeRetain, 
00108     int nodeConstr, 
00109     Matrix &constrnt,
00110     ID &constrainedDOF,
00111         ID &retainedDOF);
00112 
00114     virtual ~MP_Constraint();
00115 
00117     virtual int getNodeRetained(void) const;
00119     virtual int getNodeConstrained(void) const;    
00121     virtual const ID &getConstrainedDOFs(void) const;        
00123     virtual const ID &getRetainedDOFs(void) const;            
00125     virtual int applyConstraint(double pseudoTime);
00127     virtual bool isTimeVarying(void) const;
00129     virtual const Matrix &getConstraint(void);    
00130 
00132     virtual int sendSelf(int commitTag, Channel &theChannel);
00134     virtual int recvSelf(int commitTag, Channel &theChannel, 
00135     FEM_ObjectBroker &theBroker);
00136     
00138     virtual void Print(ostream &s, int flag =0);
00139 
00140   protected:
00141     
00142   private:
00144     int nodeRetained;        
00145     int nodeConstrained;     
00146     Matrix *constraint;      
00147     ID *constrDOF;           
00148     ID *retainDOF;           
00149     
00150     int dbTag1, dbTag2;      // need a dbTag for the two ID's
00151 };
00152 
00153 #endif
00154