trans2d.h

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// $Id: trans2d.h 751 2006-03-31 15:43:49Z alex $
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 */
// Header for the 2D Matrix transformation class

/*
*/



#ifndef TRANS2D_INC
#define TRANS2D_INC

#include "tranform.h"
#include "matrix.h"

class DocCoord;



/********************************************************************************************

>   class Trans2DMatrix : public TransInvertable

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    10/02/94
    Purpose:    This transformation will perform any 2D matrix transformations such as :-
                Translate, Rotate, Scale and Shear

********************************************************************************************/

class Trans2DMatrix : public TransInvertable      
{
CC_DECLARE_DYNAMIC(Trans2DMatrix);

public:
    // constructors
    Trans2DMatrix( );
    Trans2DMatrix( DocCoord CentreOfRot, ANGLE RotateBy );
    Trans2DMatrix( INT32 TransX, INT32 TransY );
    Trans2DMatrix( const Matrix &NewMatrix);
    Trans2DMatrix( const Trans2DMatrix&);
    void InitDecomposedTransforms();

    // construction helper functions
    void SetTransform();
    void SetTransform(DocCoord CentreOfRot, ANGLE RotateBy);
    void SetTransform(INT32 TransX, INT32 TransY);
    void SetTransform(const Matrix& NewMatrix);
    void SetTransform(const Trans2DMatrix&);

    // virtual functions
    virtual void Transform(DocCoord* Coords, INT32 NumPoints);
    virtual BOOL IsInvertable();
    virtual void Invert();
    virtual BOOL IsTranslation();

    INT32 GetWorkingQuadrant(); // MRH - 07/07/00

    Trans2DMatrix& operator*=(const Trans2DMatrix&); 
    Trans2DMatrix& operator=(const Trans2DMatrix&); 

    // Access function
    Matrix  GetMatrix()  { return  TransMatrix; }
    Matrix* GetpMatrix() { return &TransMatrix; }

    void     EnsureDecomposedTransformsCached();
    FIXED16  GetScale();
    FIXED16  GetAspect();
    ANGLE    GetRotation();
    ANGLE    GetSkew();
    DocCoord GetTranslation();
    virtual  FIXED16 GetScalar();

// Member vars
protected:
    Matrix  TransMatrix;

    FIXED16  Scale;
    FIXED16  Aspect;
    ANGLE    Rotation;
    ANGLE    Skew;
    DocCoord Translation;
    FIXED16  ScaleY;
};

#endif  // TRANS2D_INC

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