/// The matrix elements in the usual mathematical notation.
wxDouble m_11, m_12, m_21, m_22;
};
+
+
+/**
+ @class wxAffineMatrix2DBase
+
+ A 2x3 matrix representing an affine 2D transformation.
+
+ This is an abstract base class implemented by wxAffineMatrix2D only so far,
+ but in the future we also plan to derive wxGraphicsMatrix from it.
+
+ @library{wxcore}
+ @category{misc}
+
+ @since 2.9.2
+*/
+class wxAffineMatrix2DBase
+{
+public:
+ /**
+ Default constructor.
+
+ The matrix elements are initialize to the identity matrix.
+ */
+ wxAffineMatrix2DBase();
+ virtual ~wxAffineMatrix2DBase();
+
+ /**
+ Set all elements of this matrix.
+
+ @param mat2D
+ The rotational components of the matrix (upper 2 x 2).
+ @param tr
+ The translational components of the matrix.
+ */
+ virtual void Set(const wxMatrix2D& mat2D, const wxPoint2DDouble& tr) = 0;
+
+ /**
+ Get the component values of the matrix.
+
+ @param mat2D
+ The rotational components of the matrix (upper 2 x 2), must be
+ non-@NULL.
+ @param tr
+ The translational components of the matrix, may be @NULL.
+ */
+ virtual void Get(wxMatrix2D* mat2D, wxPoint2DDouble* tr) const = 0;
+
+ /**
+ Concatenate this matrix with another one.
+
+ The parameter matrix is the multiplicand.
+
+ @param t
+ The multiplicand.
+
+ @code
+ // | t.m_11 t.m_12 0 | | m_11 m_12 0 |
+ // matrix' = | t.m_21 t.m_22 0 | x | m_21 m_22 0 |
+ // | t.m_tx t.m_ty 1 | | m_tx m_ty 1 |
+ @endcode
+ */
+ virtual void Concat(const wxAffineMatrix2DBase& t) = 0;
+
+ /**
+ Invert this matrix.
+
+ If the matrix is not invertible, i.e. if its determinant is 0, returns
+ false and doesn't modify it.
+
+ @code
+ // | m_11 m_12 0 |
+ // Invert | m_21 m_22 0 |
+ // | m_tx m_ty 1 |
+ @endcode
+ */
+ virtual bool Invert() = 0;
+
+ /**
+ Check if this is the identity matrix.
+ */
+ virtual bool IsIdentity() const = 0;
+
+ //@{
+ /**
+ Check that this matrix is identical with @t.
+
+ @param t
+ The matrix compared with this.
+ */
+ virtual bool IsEqual(const wxAffineMatrix2DBase& t) const = 0;
+ bool operator==(const wxAffineMatrix2DBase& t) const;
+ //@}
+
+ /**
+ Check that this matrix differs from @t.
+
+ @param t
+ The matrix compared with this.
+ */
+ bool operator!=(const wxAffineMatrix2DBase& t) const;
+
+
+
+ /**
+ Add the translation to this matrix.
+
+ @param dx
+ The translation in x direction.
+ @param dy
+ The translation in y direction.
+ */
+ virtual void Translate(wxDouble dx, wxDouble dy) = 0;
+
+ /**
+ Add scaling to this matrix.
+
+ @param xScale
+ Scaling in x direction.
+ @param yScale
+ Scaling in y direction.
+ */
+ virtual void Scale(wxDouble xScale, wxDouble yScale) = 0;
+
+ /**
+ Add counter clockwise rotation to this matrix.
+
+ @param ccRadians
+ Rotation angle in radians.
+ */
+ virtual void Rotate(wxDouble ccRadians) = 0;
+
+ /**
+ Add mirroring to this matrix.
+
+ @param direction
+ The direction(s) used for mirroring. One of wxHORIZONTAL,
+ wxVERTICAL or their combination wxBOTH.
+ */
+ void Mirror(int direction = wxHORIZONTAL);
+
+
+ /**
+ Applies this matrix to the point.
+
+ @param p
+ The point receiving the transformations.
+
+ @return The point with the transformations applied.
+ */
+ wxPoint2DDouble TransformPoint(const wxPoint2DDouble& src) const;
+ void TransformPoint(wxDouble* x, wxDouble* y) const;
+
+ /**
+ Applies the linear part of this matrix, i.e. without translation.
+
+ @param p
+ The source receiving the transformations.
+
+ @return The source with the transformations applied.
+ */
+ wxPoint2DDouble TransformDistance(const wxPoint2DDouble& src) const;
+ void TransformDistance(wxDouble* dx, wxDouble* dy) const;
+
+};