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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 08:23:19 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/domain/load/Load.h,v $
00024                                                                         
00025                                                                         
00026 #ifndef Load_h
00027 #define Load_h
00028 
00029 // File: ~/domain/load/Load.h
00030 //
00031 // Written: fmk 
00032 // Created: 11/96
00033 // Revision: A
00034 //
00035 // Purpose: This file contains the class definition for Load.
00036 // Load is an abstract class. A Load object is used to add load
00037 // to the model. 
00038 //
00039 // What: "@(#) Load.h, revA"
00040 
00041 #include <ID.h>
00042 #include <DomainComponent.h>
00043 
00053 class Load : public DomainComponent    
00054 {
00055   public:
00060     Load(int tag, int classTag);
00061 
00062 
00067     virtual ~Load();
00068 
00069 
00071     virtual void applyLoad(double loadfactor) =0;
00072     
00077     virtual void setLoadPatternTag(int loadPaternTag);
00078 
00085     virtual int  getLoadPatternTag(void) const;
00086 
00087 
00088   protected:
00089  
00090   private:
00092     int loadPatternTag;
00093 
00094 };
00095 
00096 #endif