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// File gp_Mat2d.cxx, JCV 08/01/91
// 10/09/97 : PMN : Correction BUC40192 (pb avec les matrices negatives)
#ifndef DEB
#define No_Standard_OutOfRange
#define No_Standard_ConstructionError
#endif
#include <gp_Mat2d.ixx>
#include <Standard_ConstructionError.hxx>
gp_Mat2d::gp_Mat2d (const gp_XY& Col1, const gp_XY& Col2)
{
Mat2d00 = Col1.X(); Mat2d10 = Col1.Y();
Mat2d01 = Col2.X(); Mat2d11 = Col2.Y();
}
void gp_Mat2d::SetCol (const Standard_Integer Col,
const gp_XY& Value)
{
Standard_OutOfRange_Raise_if (Col < 1 || Col > 2,"");
if (Col == 1) {
Mat2d00 = Value.X();
Mat2d10 = Value.Y();
}
else {
Mat2d01 = Value.X();
Mat2d11 = Value.Y();
}
}
void gp_Mat2d::SetCols (const gp_XY& Col1,
const gp_XY& Col2)
{
Mat2d00 = Col1.X(); Mat2d10 = Col1.Y();
Mat2d01 = Col2.X(); Mat2d11 = Col2.Y();
}
void gp_Mat2d::SetRow (const Standard_Integer Row, const gp_XY& Value)
{
Standard_OutOfRange_Raise_if (Row < 1 || Row > 2,"");
if (Row == 1) {
Mat2d00 = Value.X();
Mat2d01 = Value.Y();
}
else {
Mat2d10 = Value.X();
Mat2d11 = Value.Y();
}
}
void gp_Mat2d::SetRows (const gp_XY& Row1, const gp_XY& Row2)
{
Mat2d00 = Row1.X(); Mat2d01 = Row1.Y();
Mat2d10 = Row2.X(); Mat2d11 = Row2.Y();
}
gp_XY gp_Mat2d::Column (const Standard_Integer Col) const
{
Standard_OutOfRange_Raise_if (Col < 1 || Col > 2,"");
if (Col == 1) return gp_XY (Mat2d00,Mat2d10);
return gp_XY (Mat2d01,Mat2d11);
}
gp_XY gp_Mat2d::Diagonal () const
{
return gp_XY (Mat2d00,Mat2d11);
}
gp_XY gp_Mat2d::Row (const Standard_Integer Row) const
{
Standard_OutOfRange_Raise_if (Row < 1 || Row > 2,"");
if (Row == 1) return gp_XY (Mat2d00,Mat2d01);
return gp_XY (Mat2d10,Mat2d11);
}
void gp_Mat2d::Invert ()
{
Standard_Real det ;
gp_Mat2d NewMat;
Nat00 = Mat2d11 ;
Nat01 = -Mat2d01 ;
Nat10 = -Mat2d10 ;
Nat11 = Mat2d00 ;
det = Nat00 * Nat11 - Nat01 * Nat10 ;
Standard_Real val = det;
if (val < 0) val = - val;
Standard_ConstructionError_Raise_if (val <= gp::Resolution(),"");
det = 1.0 / det ;
Mat2d00 = Nat00 * det ;
Mat2d10 = Nat10 * det ;
Mat2d01 = Nat01 * det ;
Mat2d11 = Nat11 * det ;
}
void gp_Mat2d::Power (const Standard_Integer N)
{
if (N == 1) { }
else if (N == 0) { SetIdentity (); }
else if (N == -1) { Invert(); }
else {
if (N < 0) Invert();
Standard_Integer Npower = N;
if (Npower < 0) Npower = - Npower;
Npower--;
gp_Mat2d Temp = *this;
while (1) {
if (IsOdd(Npower)) Multiply (Temp);
if (Npower == 1) break;
Temp.Multiply (Temp);
Npower = Npower/2;
}
}
}
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