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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/SP_Constraint.h,v $
00024                                                                         
00025                                                                         
00026 #ifndef SP_Constraint_h
00027 #define SP_Constraint_h
00028 
00029 // File: ~/domain/constraints/SP_Constraint.h
00030 //
00031 // Written: fmk 
00032 // Created: 11/96
00033 // Revision: A
00034 //
00035 // Purpose: This file contains the class definition for SP_Constraint.
00036 // SP_Constraint is a class which stores the information for a single
00037 // point constraint. Each single point constraint specifies a particular
00038 // degree-of-freedom response (displacement, rotation) at a node.
00039 // The constraint may be time-varying .. time varying constarints however 
00040 // must be implemented using subclasses.
00041 //
00042 // What: "@(#) SP_Constraint, revA"
00043 
00044 #include <DomainComponent.h>
00045 #include <iostream.h>
00046 #include <bool.h>
00047 
00057 class SP_Constraint : public DomainComponent
00058 {
00059   public:
00061     SP_Constraint(int classTag);        
00063     SP_Constraint(int spTag, int nodeTag, int ndof, int classTag);    
00064 
00066     SP_Constraint(int spTag, int nodeTag, int ndof, double value, bool isConstant = true);
00067 
00069     virtual ~SP_Constraint();
00070 
00072     virtual int getNodeTag(void) const;
00074     virtual int getDOF_Number(void) const;
00076     virtual int applyConstraint(double loadFactor);    
00078     virtual double getValue(void);
00080     virtual bool isHomogeneous(void) const;
00082     virtual void setLoadPatternTag(int loadPaternTag);
00084     virtual int  getLoadPatternTag(void) const;
00085     
00087     virtual int sendSelf(int commitTag, Channel &theChannel);
00089     virtual int recvSelf(int commitTag, Channel &theChannel, 
00090     FEM_ObjectBroker &theBroker);
00091 
00093     virtual void Print(ostream &s, int flag =0);
00094 
00095   protected:
00097     int nodeTag;     
00098     int dofNumber;   
00099     double valueR;   
00100     double valueC;   // if constant = the reference value, if not contant =
00102 
00103     bool isConstant; 
00104     int  loadPatternTag;    
00105 };
00106 
00107 #endif
00108 
00109