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HessianApproximation.h

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00001 /* ****************************************************************** **
00002 **    OpenSees - Open System for Earthquake Engineering Simulation    **
00003 **          Pacific Earthquake Engineering Research Center            **
00004 **                                                                    **
00005 **                                                                    **
00006 ** (C) Copyright 2001, 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 ** Reliability module developed by:                                   **
00020 **   Terje Haukaas (haukaas@ce.berkeley.edu)                          **
00021 **   Armen Der Kiureghian (adk@ce.berkeley.edu)                       **
00022 **                                                                    **
00023 ** ****************************************************************** */
00024                                                                         
00025 // $Revision: 1.1 $
00026 // $Date: 2003/03/04 00:39:20 $
00027 // $Source: /usr/local/cvs/OpenSees/SRC/reliability/analysis/hessianApproximation/HessianApproximation.h,v $
00028 
00029 
00030 //
00031 // Written by Terje Haukaas (haukaas@ce.berkeley.edu)
00032 //
00033 
00034 #ifndef HessianApproximation_h
00035 #define HessianApproximation_h
00036 
00037 #include <Matrix.h>
00038 
00039 class HessianApproximation
00040 {
00041 
00042 public:
00043         HessianApproximation();
00044         virtual ~HessianApproximation();
00045 
00046         virtual Matrix  getHessianApproximation() = 0;
00047         virtual int     setHessianToIdentity(int size) = 0;
00048         virtual int     updateHessianApproximation(Vector u_old,
00049                                                                                            double g_old,
00050                                                                                            Vector gradG_old,
00051                                                                                            double stepSize,
00052                                                                                            Vector searchDirection,
00053                                                                                            double g_new,
00054                                                                                            Vector gradG_new) = 0;
00055 
00056 protected:
00057 
00058 private:
00059 
00060 };
00061 
00062 #endif

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