mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-06-10 11:34:06 +03:00
a5a7b3185b
Update empty method guards to new style with regex (see PR). Used clang-format 18.1.8. New actions to validate code formatting is added. Update .clang-format with disabling of include sorting. It is temporary changes, then include will be sorted. Apply formatting for /src and /tools folder. The files with .hxx,.cxx,.lxx,.h,.pxx,.hpp,*.cpp extensions.
120 lines
2.9 KiB
C++
120 lines
2.9 KiB
C++
// Copyright (c) 1997-1999 Matra Datavision
|
|
// Copyright (c) 1999-2014 OPEN CASCADE SAS
|
|
//
|
|
// This file is part of Open CASCADE Technology software library.
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify it under
|
|
// the terms of the GNU Lesser General Public License version 2.1 as published
|
|
// by the Free Software Foundation, with special exception defined in the file
|
|
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
|
|
// distribution for complete text of the license and disclaimer of any warranty.
|
|
//
|
|
// Alternatively, this file may be used under the terms of Open CASCADE
|
|
// commercial license or contractual agreement.
|
|
|
|
#include <math_Gauss.hxx>
|
|
|
|
#include <math_Matrix.hxx>
|
|
#include <math_NotSquare.hxx>
|
|
#include <math_Recipes.hxx>
|
|
#include <Standard_DimensionError.hxx>
|
|
#include <StdFail_NotDone.hxx>
|
|
|
|
math_Gauss::math_Gauss(const math_Matrix& A,
|
|
const Standard_Real MinPivot,
|
|
const Message_ProgressRange& theProgress)
|
|
: LU(1, A.RowNumber(), 1, A.ColNumber()),
|
|
Index(1, A.RowNumber()),
|
|
D(0.0),
|
|
Done(Standard_False)
|
|
{
|
|
math_NotSquare_Raise_if(A.RowNumber() != A.ColNumber(), " ");
|
|
LU = A;
|
|
Standard_Integer Error = LU_Decompose(LU, Index, D, MinPivot, theProgress);
|
|
if (!Error)
|
|
{
|
|
Done = Standard_True;
|
|
}
|
|
else
|
|
{
|
|
Done = Standard_False;
|
|
}
|
|
}
|
|
|
|
void math_Gauss::Solve(const math_Vector& B, math_Vector& X) const
|
|
{
|
|
|
|
StdFail_NotDone_Raise_if(!Done, " ");
|
|
|
|
X = B;
|
|
LU_Solve(LU, Index, X);
|
|
}
|
|
|
|
void math_Gauss::Solve(math_Vector& X) const
|
|
{
|
|
|
|
StdFail_NotDone_Raise_if(!Done, " ");
|
|
|
|
if (X.Length() != LU.RowNumber())
|
|
{
|
|
throw Standard_DimensionError();
|
|
}
|
|
LU_Solve(LU, Index, X);
|
|
}
|
|
|
|
Standard_Real math_Gauss::Determinant() const
|
|
{
|
|
|
|
StdFail_NotDone_Raise_if(!Done, " ");
|
|
|
|
Standard_Real Result = D;
|
|
for (Standard_Integer J = 1; J <= LU.UpperRow(); J++)
|
|
{
|
|
Result *= LU(J, J);
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
void math_Gauss::Invert(math_Matrix& Inv) const
|
|
{
|
|
|
|
StdFail_NotDone_Raise_if(!Done, " ");
|
|
|
|
Standard_DimensionError_Raise_if((Inv.RowNumber() != LU.RowNumber())
|
|
|| (Inv.ColNumber() != LU.ColNumber()),
|
|
" ");
|
|
|
|
Standard_Integer LowerRow = Inv.LowerRow();
|
|
Standard_Integer LowerCol = Inv.LowerCol();
|
|
math_Vector Column(1, LU.UpperRow());
|
|
|
|
Standard_Integer I, J;
|
|
for (J = 1; J <= LU.UpperRow(); J++)
|
|
{
|
|
for (I = 1; I <= LU.UpperRow(); I++)
|
|
{
|
|
Column(I) = 0.0;
|
|
}
|
|
Column(J) = 1.0;
|
|
LU_Solve(LU, Index, Column);
|
|
for (I = 1; I <= LU.RowNumber(); I++)
|
|
{
|
|
Inv(I + LowerRow - 1, J + LowerCol - 1) = Column(I);
|
|
}
|
|
}
|
|
}
|
|
|
|
void math_Gauss::Dump(Standard_OStream& o) const
|
|
{
|
|
o << "math_Gauss ";
|
|
if (Done)
|
|
{
|
|
o << " Status = Done \n";
|
|
o << " Determinant of A = " << D << std::endl;
|
|
}
|
|
else
|
|
{
|
|
o << " Status = not Done \n";
|
|
}
|
|
}
|