mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-04-04 18:06:22 +03:00
b9280b8b27
Removed unused exception classes OSD_Exception_FLT_DIVIDE_BY_ZERO, OSD_Exception_INT_DIVIDE_BY_ZERO, OSD_Exception_FLT_DENORMAL_OPERAND, OSD_Exception_FLT_INEXACT_RESULT, OSD_Exception_FLT_INVALID_OPERATION, OSD_Exception_FLT_OVERFLOW, OSD_Exception_FLT_STACK_CHECK, OSD_Exception_FLT_UNDERFLOW.
116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
// Copyright (c) 1997-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <math_Gauss.hxx>
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#include <math_Matrix.hxx>
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#include <math_NotSquare.hxx>
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#include <math_Recipes.hxx>
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#include <Standard_DimensionError.hxx>
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#include <StdFail_NotDone.hxx>
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math_Gauss::math_Gauss(const math_Matrix& A,
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const Standard_Real MinPivot,
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const Message_ProgressRange& theProgress)
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: LU (1, A.RowNumber(), 1, A.ColNumber()),
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Index(1, A.RowNumber()),
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D (0.0),
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Done (Standard_False)
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{
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math_NotSquare_Raise_if(A.RowNumber() != A.ColNumber(), " ");
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LU = A;
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Standard_Integer Error = LU_Decompose(LU,
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Index,
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D,
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MinPivot,
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theProgress);
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if(!Error) {
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Done = Standard_True;
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}
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else {
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Done = Standard_False;
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}
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}
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void math_Gauss::Solve(const math_Vector& B, math_Vector& X) const{
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StdFail_NotDone_Raise_if(!Done, " ");
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X = B;
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LU_Solve(LU,
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Index,
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X);
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}
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void math_Gauss::Solve (math_Vector& X) const{
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StdFail_NotDone_Raise_if(!Done, " ");
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if(X.Length() != LU.RowNumber()) {
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throw Standard_DimensionError();
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}
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LU_Solve(LU,
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Index,
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X);
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}
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Standard_Real math_Gauss::Determinant() const{
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StdFail_NotDone_Raise_if(!Done, " ");
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Standard_Real Result = D;
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for(Standard_Integer J = 1; J <= LU.UpperRow(); J++) {
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Result *= LU(J,J);
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}
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return Result;
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}
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void math_Gauss::Invert(math_Matrix& Inv) const{
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StdFail_NotDone_Raise_if(!Done, " ");
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Standard_DimensionError_Raise_if((Inv.RowNumber() != LU.RowNumber()) ||
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(Inv.ColNumber() != LU.ColNumber()),
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" ");
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Standard_Integer LowerRow = Inv.LowerRow();
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Standard_Integer LowerCol = Inv.LowerCol();
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math_Vector Column(1, LU.UpperRow());
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Standard_Integer I, J;
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for(J = 1; J <= LU.UpperRow(); J++) {
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for(I = 1; I <= LU.UpperRow(); I++) {
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Column(I) = 0.0;
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}
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Column(J) = 1.0;
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LU_Solve(LU, Index, Column);
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for(I = 1; I <= LU.RowNumber(); I++) {
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Inv(I+LowerRow-1,J+LowerCol-1) = Column(I);
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}
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}
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}
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void math_Gauss::Dump(Standard_OStream& o) const {
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o << "math_Gauss ";
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if(Done) {
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o<< " Status = Done \n";
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o << " Determinant of A = " << D << std::endl;
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}
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else {
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o << " Status = not Done \n";
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}
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}
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