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#ifndef __CGLA_MAT2X2D_H__
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#ifndef __CGLA_MAT2X2D_H__
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#define __CGLA_MAT2X2D_H__
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#define __CGLA_MAT2X2D_H__
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#include "Vec2d.h"
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#include "Vec2d.h"
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#include "ArithSqMat2x2Float.h"
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#include "ArithSqMat2x2Float.h"
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namespace CGLA {
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namespace CGLA {
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  /** \brief Two by two double matrix.
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  /** Two by two double matrix. This class is useful for various
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	This class is useful for various
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      vector transformations in the plane. */
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	vector transformations in the plane. */
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  class Mat2x2d: public ArithSqMat2x2Float<Vec2d, Mat2x2d>
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  class Mat2x2d: public ArithSqMat2x2Float<Vec2d, Mat2x2d>
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    {
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    {
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    public:
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    public:
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      /// Construct a Mat2x2d from two Vec2d vectors.
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      /// Construct a Mat2x2d from two Vec2d vectors.
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      Mat2x2d(Vec2d a, Vec2d b): ArithSqMat2x2Float<Vec2d, Mat2x2d> (a,b) {}
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      Mat2x2d(Vec2d a, Vec2d b): ArithSqMat2x2Float<Vec2d, Mat2x2d> (a,b) {}
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      /// Construct a Mat2x2f from four scalars.
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      /// Construct a Mat2x2f from four scalars.
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      Mat2x2d(double a, double b, double c, double d):
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      Mat2x2d(double a, double b, double c, double d):
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	ArithSqMat2x2Float<Vec2d, Mat2x2d>(Vec2d(a,b),Vec2d(c,d)) {}
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	ArithSqMat2x2Float<Vec2d, Mat2x2d>(Vec2d(a,b),Vec2d(c,d)) {}
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      /// Construct the NAN matrix
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      /// Construct the NAN matrix
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      Mat2x2d() {}
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      Mat2x2d() {}
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      /// Construct a Mat2x2d from a single scalar
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      /// Construct a Mat2x2d from a single scalar
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      explicit Mat2x2d(double a):
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      explicit Mat2x2d(double a):
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	ArithSqMat2x2Float<Vec2d, Mat2x2d>(a) {}
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	ArithSqMat2x2Float<Vec2d, Mat2x2d>(a) {}
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    };
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    };
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}
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}
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#endif
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#endif
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