Many plot window gooddies.

[wxWidgets.git] / include / wx / geometry.h

/////////////////////////////////////////////////////////////////////////////
// Name:        geometry.h
// Purpose:     Common Geometry Classes
// Author:      Stefan Csomor
// Modified by:
// Created:     08/05/99
// RCS-ID:      
// Copyright:   (c)
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GEOMETRY_H_
#define _WX_GEOMETRY_H_

#ifdef __GNUG__
#pragma interface "geometry.h"
#endif

#include "wx/defs.h"

#ifndef wxUSE_GEOMETRY
    #define wxUSE_GEOMETRY 0
#endif

#if wxUSE_GEOMETRY

#include "wx/utils.h"
#include "wx/gdicmn.h"
#include <math.h>

#ifdef __WXMSW__
    #define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c )
#elif defined( __WXMAC__ )
    #include "Math64.h"
    #define wxMulDivInt32( a , b , c ) S32Set( S64Div( S64Multiply( S64Set(a) , S64Set(b) ) , S64Set(c) ) )
#else
    #define wxMulDivInt32( a , b , c ) ((wxInt32)((a)*(((wxDouble)b)/((wxDouble)c))))
#endif

class wxDataInputStream ;
class wxDataOutputStream ;

// clipping from Cohen-Sutherland

enum wxOutCode
{
    wxInside = 0x00 ,
    wxOutLeft = 0x01 ,
    wxOutRight = 0x02 ,
    wxOutTop = 0x08 ,
    wxOutBottom = 0x04 
} ;

// wxPoint2Ds represent a point or a vector in a 2d coordinate system 

class WXDLLEXPORT wxPoint2DDouble
{
public :
        wxPoint2DDouble();
        wxPoint2DDouble( wxDouble x , wxDouble y ) ;
        wxPoint2DDouble( const wxPoint2DDouble &pt ) ;
        
        // two different conversions to integers, floor and rounding
        void GetFloor( wxInt32 *x , wxInt32 *y ) ;
        void GetRounded( wxInt32 *x , wxInt32 *y ) ;

        wxDouble GetVectorLength() ;
        wxDouble GetVectorAngle() ;
        void SetVectorLength( wxDouble length ) ;
        void SetVectorAngle( wxDouble degrees ) ;
        void SetPolarCoordinates( wxDouble angle , wxDouble length ) ;
        // set the vector length to 1.0, preserving the angle
        void Normalize() ;
        
        wxDouble GetDistance( const wxPoint2DDouble &pt ) ;
        wxDouble GetDistanceSquare( const wxPoint2DDouble &pt ) ;
        wxDouble GetDotProduct( const wxPoint2DDouble &vec ) ;
        wxDouble GetCrossProduct( const wxPoint2DDouble &vec ) ;

        // the reflection of this point
        wxPoint2DDouble operator-() ;
       
        wxPoint2DDouble& operator=(const wxPoint2DDouble& pt) ;
        wxPoint2DDouble& operator+=(const wxPoint2DDouble& pt) ;
        wxPoint2DDouble& operator-=(const wxPoint2DDouble& pt) ;
        wxPoint2DDouble& operator*=(const wxPoint2DDouble& pt) ;
        wxPoint2DDouble& operator*=(wxDouble n) ;
        wxPoint2DDouble& operator*=(wxInt32 n) ;
        wxPoint2DDouble& operator/=(const wxPoint2DDouble& pt) ;
        wxPoint2DDouble& operator/=(wxDouble n) ;
        wxPoint2DDouble& operator/=(wxInt32 n) ;

        bool operator==(const wxPoint2DDouble& pt) const ;
        bool operator!=(const wxPoint2DDouble& pt) const ;

        wxDouble m_x ;
        wxDouble m_y ;
} ;

wxPoint2DDouble operator+(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) ;
wxPoint2DDouble operator-(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) ;
wxPoint2DDouble operator*(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) ;
wxPoint2DDouble operator*(wxDouble n , const wxPoint2DDouble& pt) ;
wxPoint2DDouble operator*(wxInt32 n , const wxPoint2DDouble& pt) ;
wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxDouble n) ;
wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxInt32 n) ;
wxPoint2DDouble operator/(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) ;
wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxDouble n) ;
wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxInt32 n) ;

inline wxPoint2DDouble::wxPoint2DDouble() 
{ 
    m_x = 0.0 ; 
    m_y = 0.0 ; 
}

inline wxPoint2DDouble::wxPoint2DDouble( wxDouble x , wxDouble y ) 
{ 
    m_x = x ; 
    m_y = y ; 
} 

inline wxPoint2DDouble::wxPoint2DDouble( const wxPoint2DDouble &pt ) 
{ 
    m_x = pt.m_x ; 
    m_y = pt.m_y ; 
} 
        
inline void wxPoint2DDouble::GetFloor( wxInt32 *x , wxInt32 *y ) 
{ 
    *x = (wxInt32) floor( m_x ) ; 
    *y = (wxInt32) floor( m_y ) ; 
}

inline void wxPoint2DDouble::GetRounded( wxInt32 *x , wxInt32 *y ) 
{ 
    *x = (wxInt32) floor( m_x + 0.5 ) ; 
    *y = (wxInt32) floor( m_y + 0.5) ; 
}

inline wxDouble wxPoint2DDouble::GetDistance( const wxPoint2DDouble &pt ) 
{ 
    return sqrt( GetDistanceSquare( pt ) ); 
}

inline wxDouble wxPoint2DDouble::GetDistanceSquare( const wxPoint2DDouble &pt ) 
{ 
    return ( (pt.m_x-m_x)*(pt.m_x-m_x) + (pt.m_y-m_y)*(pt.m_y-m_y) ) ;
} 

inline wxDouble wxPoint2DDouble::GetDotProduct( const wxPoint2DDouble &vec ) 
{ 
    return ( m_x * vec.m_x + m_y * vec.m_y ) ;
}

inline wxDouble wxPoint2DDouble::GetCrossProduct( const wxPoint2DDouble &vec ) 
{ 
    return ( m_x * vec.m_y - vec.m_x * m_y ) ;
} 

inline wxPoint2DDouble wxPoint2DDouble::operator-() 
{ 
    return wxPoint2DDouble( -m_x, -m_y);
}

inline wxPoint2DDouble& wxPoint2DDouble::operator=(const wxPoint2DDouble& pt)
{ 
    m_x = pt.m_x ; 
    m_y = pt.m_y; 
    return *this ;
}

inline wxPoint2DDouble& wxPoint2DDouble::operator+=(const wxPoint2DDouble& pt) 
{
    m_x = m_x + pt.m_x ; 
    m_y = m_y + pt.m_y; 
    return *this ;
}

inline wxPoint2DDouble& wxPoint2DDouble::operator-=(const wxPoint2DDouble& pt) 
{ 
    m_x = m_x - pt.m_x ; 
    m_y = m_y - pt.m_y; 
    return *this ;
}

inline wxPoint2DDouble& wxPoint2DDouble::operator*=(const wxPoint2DDouble& pt) 
{ 
    m_x = m_x + pt.m_x ; 
    m_y = m_y + pt.m_y; 
    return *this ;
}

inline wxPoint2DDouble& wxPoint2DDouble::operator/=(const wxPoint2DDouble& pt) 
{ 
    m_x = m_x - pt.m_x ; 
    m_y = m_y - pt.m_y;
    return *this ;
}

inline bool wxPoint2DDouble::operator==(const wxPoint2DDouble& pt) const 
{ 
    return m_x == pt.m_x && m_y == pt.m_y; 
}

inline bool wxPoint2DDouble::operator!=(const wxPoint2DDouble& pt) const 
{ 
    return m_x != pt.m_x || m_y != pt.m_y; 
}

inline wxPoint2DDouble operator+(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) 
{
    return wxPoint2DDouble( pt1.m_x + pt2.m_x , pt1.m_y + pt2.m_y ) ;
}

inline wxPoint2DDouble operator-(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) 
{
    return wxPoint2DDouble( pt1.m_x - pt2.m_x , pt1.m_y - pt2.m_y ) ;
}


inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) 
{
    return wxPoint2DDouble( pt1.m_x * pt2.m_x , pt1.m_y * pt2.m_y ) ;
}

inline wxPoint2DDouble operator*(wxDouble n , const wxPoint2DDouble& pt) 
{
    return wxPoint2DDouble( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DDouble operator*(wxInt32 n , const wxPoint2DDouble& pt) 
{
    return wxPoint2DDouble( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxDouble n) 
{
    return wxPoint2DDouble( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxInt32 n) 
{
    return wxPoint2DDouble( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2) 
{
    return wxPoint2DDouble( pt1.m_x / pt2.m_x , pt1.m_y / pt2.m_y ) ;
}

inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxDouble n) 
{
    return wxPoint2DDouble( pt.m_x / n , pt.m_y / n ) ;
}

inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxInt32 n) 
{
    return wxPoint2DDouble( pt.m_x / n , pt.m_y / n ) ;
}

// wxRect2Ds are a axis-aligned rectangles, each side of the rect is parallel to the x- or m_y- axis. The rectangle is either defined by the 
// top left and bottom right corner, or by the top left corner and size. A point is contained within the rectangle if
// left <= x < right  and top <= m_y < bottom , thus it is a half open interval. 

class WXDLLEXPORT wxRect2DDouble
{
public:
       wxRect2DDouble() { m_x = m_y = m_width = m_height = 0 ; }
       wxRect2DDouble(wxDouble x, wxDouble y, wxDouble w, wxDouble h) { m_x = x ; m_y = y ; m_width = w ;  m_height = h ; }
       wxRect2DDouble(const wxPoint2DDouble& topLeft, const wxPoint2DDouble& bottomRight);
       wxRect2DDouble(const wxPoint2DDouble& pos, const wxSize& size);
       wxRect2DDouble(const wxRect2DDouble& rect);

        // single attribute accessors

      inline wxPoint2DDouble GetPosition() { return wxPoint2DDouble(m_x, m_y); }
       inline wxSize GetSize() { return wxSize(m_width, m_height); }

        // for the edge and corner accessors there are two setters conterparts, the Set.. functions keep the other corners at their
        // position whenever sensible, the Move.. functions keep the size of the rect and move the other corners apropriately

      inline wxDouble GetLeft() const { return m_x; }
       inline void SetLeft( wxDouble n ) { m_width += m_x - n ; m_x = n ; }
       inline void MoveLeftTo( wxDouble n ) { m_x = n ; }
       inline wxDouble GetTop() const { return m_y; }
       inline void SetTop( wxDouble n ) { m_height += m_y - n ; m_y = n ; }
       inline void MoveTopTo( wxDouble n ) { m_y = n ; }
       inline wxDouble GetBottom() const { return m_y + m_height; }
       inline void SetBottom( wxDouble n ) { m_height += n - (m_y+m_height) ;}
       inline void MoveBottomTo( wxDouble n ) { m_y = n - m_height ; }
       inline wxDouble GetRight() const { return m_x + m_width; }
       inline void SetRight( wxDouble n ) { m_width += n - (m_x+m_width)  ; }
       inline void MoveRightTo( wxDouble n ) { m_x = n - m_width ; }

        inline wxPoint2DDouble GetLeftTop() const { return wxPoint2DDouble( m_x , m_y ) ; }
        inline void SetLeftTop( const wxPoint2DDouble &pt ) { m_width += m_x - pt.m_x ; m_height += m_y - pt.m_y ; m_x = pt.m_x ; m_y = pt.m_y ; }            
        inline void MoveLeftTopTo( const wxPoint2DDouble &pt ) { m_x = pt.m_x ; m_y = pt.m_y ; }            
        inline wxPoint2DDouble GetLeftBottom() const { return wxPoint2DDouble( m_x , m_y + m_height ) ; }
        inline void SetLeftBottom( const wxPoint2DDouble &pt ) { m_width += m_x - pt.m_x ; m_height += pt.m_y - (m_y+m_height)  ; m_x = pt.m_x ; }            
        inline void MoveLeftBottomTo( const wxPoint2DDouble &pt ) { m_x = pt.m_x ; m_y = pt.m_y - m_height; }            
        inline wxPoint2DDouble GetRightTop() const { return wxPoint2DDouble( m_x+m_width , m_y ) ; }
        inline void SetRightTop( const wxPoint2DDouble &pt ) { m_width += pt.m_x - ( m_x + m_width ) ; m_height += m_y - pt.m_y ; m_y = pt.m_y ; }            
        inline void MoveRightTopTo( const wxPoint2DDouble &pt ) { m_x = pt.m_x - m_width ; m_y = pt.m_y ; }            
        inline wxPoint2DDouble GetRightBottom() const { return wxPoint2DDouble( m_x+m_width , m_y + m_height ) ; }
        inline void SetRightBottom( const wxPoint2DDouble &pt ) { m_width += pt.m_x - ( m_x + m_width ) ; m_height += pt.m_y - (m_y+m_height) ;}            
        inline void MoveRightBottomTo( const wxPoint2DDouble &pt ) { m_x = pt.m_x - m_width ; m_y = pt.m_y - m_height; }            
        inline wxPoint2DDouble GetCentre() const { return wxPoint2DDouble( m_x+m_width/2 , m_y+m_height/2 ) ; }
        inline void SetCentre( const wxPoint2DDouble &pt ) { MoveCentreTo( pt ) ; }    // since this is impossible without moving...    
        inline void MoveCentreTo( const wxPoint2DDouble &pt ) { m_x += pt.m_x - (m_x+m_width/2) , m_y += pt.m_y -(m_y+m_height/2) ; }                
        inline wxOutCode GetOutcode( const wxPoint2DDouble &pt ) const
            { return (wxOutCode) (( ( pt.m_x < m_x ) ? wxOutLeft : 0 ) +
                     ( ( pt.m_x >= m_x + m_width ) ? wxOutRight : 0 ) +
                     ( ( pt.m_y < m_y ) ? wxOutTop : 0 )  +
                     ( ( pt.m_y >= m_y + m_height ) ? wxOutBottom : 0 )) ; }
        inline bool Contains( const wxPoint2DDouble &pt ) const 
            { return  GetOutcode( pt ) == wxInside ; }
        inline bool Contains( const wxRect2DDouble &rect ) const 
            { return ( ( ( m_x <= rect.m_x ) && ( rect.m_x + rect.m_width <= m_x + m_width ) ) && 
                ( ( m_y <= rect.m_y ) && ( rect.m_y + rect.m_height <= m_y + m_height ) ) ) ; }
        inline bool IsEmpty() const 
            { return ( m_width <= 0 || m_height <= 0 ) ; }
        inline bool HaveEqualSize( const wxRect2DDouble &rect ) const 
            { return ( rect.m_width == m_width && rect.m_height == m_height ) ; }
        
        inline void Inset( wxDouble x , wxDouble y ) { m_x += x ; m_y += y ; m_width -= 2 * x ; m_height -= 2 * y ; }
        inline void Inset( wxDouble left , wxDouble top ,wxDouble right , wxDouble bottom  ) 
            { m_x += left ; m_y += top ; m_width -= left + right ; m_height -= top + bottom ;}
        inline void Offset( const wxPoint2DDouble &pt ) { m_x += pt.m_x ; m_y += pt.m_y ; }
        void ConstrainTo( const wxRect2DDouble &rect ) ;
        inline wxPoint2DDouble Interpolate( wxInt32 widthfactor , wxInt32 heightfactor ) { return wxPoint2DDouble( m_x + m_width * widthfactor , m_y + m_height * heightfactor ) ; }

        static void Intersect( const wxRect2DDouble &src1 , const wxRect2DDouble &src2 , wxRect2DDouble *dest ) ;
        inline void Intersect( const wxRect2DDouble &otherRect ) { Intersect( *this , otherRect , this ) ; }
        inline wxRect2DDouble CreateIntersection( const wxRect2DDouble &otherRect ) const { wxRect2DDouble result ; Intersect( *this , otherRect , &result) ; return result ; }
        bool Intersects( const wxRect2DDouble &rect ) const ;

        static void Union( const wxRect2DDouble &src1 , const wxRect2DDouble &src2 , wxRect2DDouble *dest ) ;
        void Union( const wxRect2DDouble &otherRect )  { Union( *this , otherRect , this ) ; }
        void Union( const wxPoint2DDouble &pt ) ;
        inline wxRect2DDouble CreateUnion( const wxRect2DDouble &otherRect ) const { wxRect2DDouble result ; Union( *this , otherRect , &result) ; return result ; }

        inline void Scale( wxDouble f ) { m_x *= f ; m_y *= f ; m_width *= f ; m_height *= f ;} 
        inline void Scale( wxInt32 num , wxInt32 denum ) 
            { m_x *= ((wxDouble)num)/((wxDouble)denum) ; m_y *= ((wxDouble)num)/((wxDouble)denum) ; 
                m_width *= ((wxDouble)num)/((wxDouble)denum) ; m_height *= ((wxDouble)num)/((wxDouble)denum) ;}

       wxRect2DDouble& operator = (const wxRect2DDouble& rect);
       bool operator == (const wxRect2DDouble& rect);
       bool operator != (const wxRect2DDouble& rect);

       wxDouble m_x ;
        wxDouble m_y ;
        wxDouble m_width;
                      wxDouble m_height;
};

class WXDLLEXPORT wxPoint2DInt
{
public :
        wxPoint2DInt();
        wxPoint2DInt( wxInt32 x , wxInt32 y ) ;
        wxPoint2DInt( const wxPoint2DInt &pt ) ;
        wxPoint2DInt( const wxPoint &pt ) ;
        
        // two different conversions to integers, floor and rounding
        void GetFloor( wxInt32 *x , wxInt32 *y ) ;
        void GetRounded( wxInt32 *x , wxInt32 *y ) ;

        wxDouble GetVectorLength() ;
        wxDouble GetVectorAngle() ;
        void SetVectorLength( wxDouble length ) ;
        void SetVectorAngle( wxDouble degrees ) ;
        void SetPolarCoordinates( wxInt32 angle , wxInt32 length ) ;
        // set the vector length to 1.0, preserving the angle
        void Normalize() ;
        
        wxDouble GetDistance( const wxPoint2DInt &pt ) const ;
        wxDouble GetDistanceSquare( const wxPoint2DInt &pt ) const;
        wxInt32 GetDotProduct( const wxPoint2DInt &vec ) const;
        wxInt32 GetCrossProduct( const wxPoint2DInt &vec ) const;

        // the reflection of this point
        wxPoint2DInt operator-() ;
       
        wxPoint2DInt& operator=(const wxPoint2DInt& pt) ;
        wxPoint2DInt& operator+=(const wxPoint2DInt& pt) ;
        wxPoint2DInt& operator-=(const wxPoint2DInt& pt) ;
        wxPoint2DInt& operator*=(const wxPoint2DInt& pt) ;
        wxPoint2DInt& operator*=(wxDouble n) ;
        wxPoint2DInt& operator*=(wxInt32 n) ;
        wxPoint2DInt& operator/=(const wxPoint2DInt& pt) ;
        wxPoint2DInt& operator/=(wxDouble n) ;
        wxPoint2DInt& operator/=(wxInt32 n) ;
        operator wxPoint() const ;
        bool operator==(const wxPoint2DInt& pt) const ;
        bool operator!=(const wxPoint2DInt& pt) const ;

        void WriteTo( wxDataOutputStream &stream ) const ;
        void ReadFrom( wxDataInputStream &stream ) ;

        wxInt32 m_x ;
        wxInt32 m_y ;
} ;

wxPoint2DInt operator+(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) ;
wxPoint2DInt operator-(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) ;
wxPoint2DInt operator*(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) ;
wxPoint2DInt operator*(wxInt32 n , const wxPoint2DInt& pt) ;
wxPoint2DInt operator*(wxInt32 n , const wxPoint2DInt& pt) ;
wxPoint2DInt operator*(const wxPoint2DInt& pt , wxInt32 n) ;
wxPoint2DInt operator*(const wxPoint2DInt& pt , wxInt32 n) ;
wxPoint2DInt operator/(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) ;
wxPoint2DInt operator/(const wxPoint2DInt& pt , wxInt32 n) ;
wxPoint2DInt operator/(const wxPoint2DInt& pt , wxInt32 n) ;

inline wxPoint2DInt::wxPoint2DInt() 
{ 
    m_x = 0 ; 
    m_y = 0 ; 
}

inline wxPoint2DInt::wxPoint2DInt( wxInt32 x , wxInt32 y ) 
{ 
    m_x = x ; 
    m_y = y ; 
} 

inline wxPoint2DInt::wxPoint2DInt( const wxPoint2DInt &pt ) 
{ 
    m_x = pt.m_x ; 
    m_y = pt.m_y ; 
} 
        
inline wxPoint2DInt::wxPoint2DInt( const wxPoint &pt ) 
{ 
    m_x = pt.x ; 
    m_y = pt.y ; 
} 
        
inline void wxPoint2DInt::GetFloor( wxInt32 *x , wxInt32 *y ) 
{ 
    *x = (wxInt32) floor( m_x ) ; 
    *y = (wxInt32) floor( m_y ) ; 
}

inline void wxPoint2DInt::GetRounded( wxInt32 *x , wxInt32 *y ) 
{ 
    *x = (wxInt32) floor( m_x + 0.5 ) ; 
    *y = (wxInt32) floor( m_y + 0.5) ; 
}

inline wxDouble wxPoint2DInt::GetVectorLength() 
{
    return sqrt( (m_x)*(m_x) + (m_y)*(m_y) ) ;
}

inline void wxPoint2DInt::SetVectorLength( wxDouble length ) 
{
    wxDouble before = GetVectorLength() ;
    m_x = (wxInt32)(m_x * length / before) ;
    m_y = (wxInt32)(m_y * length / before) ;
}

inline void wxPoint2DInt::Normalize() 
{
    SetVectorLength( 1 ) ;
}

inline wxDouble wxPoint2DInt::GetDistance( const wxPoint2DInt &pt ) const
{ 
    return sqrt( GetDistanceSquare( pt ) ); 
}

inline wxDouble wxPoint2DInt::GetDistanceSquare( const wxPoint2DInt &pt ) const
{ 
    return ( (pt.m_x-m_x)*(pt.m_x-m_x) + (pt.m_y-m_y)*(pt.m_y-m_y) ) ;
} 

inline wxInt32 wxPoint2DInt::GetDotProduct( const wxPoint2DInt &vec ) const
{ 
    return ( m_x * vec.m_x + m_y * vec.m_y ) ;
}

inline wxInt32 wxPoint2DInt::GetCrossProduct( const wxPoint2DInt &vec ) const
{ 
    return ( m_x * vec.m_y - vec.m_x * m_y ) ;
} 

inline wxPoint2DInt::operator wxPoint() const
{ 
    return wxPoint( m_x, m_y);
}

inline wxPoint2DInt wxPoint2DInt::operator-() 
{ 
    return wxPoint2DInt( -m_x, -m_y);
}

inline wxPoint2DInt& wxPoint2DInt::operator=(const wxPoint2DInt& pt)
{ 
    m_x = pt.m_x ; 
    m_y = pt.m_y; 
    return *this ;
}

inline wxPoint2DInt& wxPoint2DInt::operator+=(const wxPoint2DInt& pt) 
{
    m_x = m_x + pt.m_x ; 
    m_y = m_y + pt.m_y; 
    return *this ;
}

inline wxPoint2DInt& wxPoint2DInt::operator-=(const wxPoint2DInt& pt) 
{ 
    m_x = m_x - pt.m_x ; 
    m_y = m_y - pt.m_y; 
    return *this ;
}

inline wxPoint2DInt& wxPoint2DInt::operator*=(const wxPoint2DInt& pt) 
{ 
    m_x = m_x + pt.m_x ; 
    m_y = m_y + pt.m_y; 
    return *this ;
}

inline wxPoint2DInt& wxPoint2DInt::operator/=(const wxPoint2DInt& pt) 
{ 
    m_x = m_x - pt.m_x ; 
    m_y = m_y - pt.m_y;
    return *this ;
}

inline bool wxPoint2DInt::operator==(const wxPoint2DInt& pt) const 
{ 
    return m_x == pt.m_x && m_y == pt.m_y; 
}

inline bool wxPoint2DInt::operator!=(const wxPoint2DInt& pt) const 
{ 
    return m_x != pt.m_x || m_y != pt.m_y; 
}

inline wxPoint2DInt operator+(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) 
{
    return wxPoint2DInt( pt1.m_x + pt2.m_x , pt1.m_y + pt2.m_y ) ;
}

inline wxPoint2DInt operator-(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) 
{
    return wxPoint2DInt( pt1.m_x - pt2.m_x , pt1.m_y - pt2.m_y ) ;
}


inline wxPoint2DInt operator*(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) 
{
    return wxPoint2DInt( pt1.m_x * pt2.m_x , pt1.m_y * pt2.m_y ) ;
}

inline wxPoint2DInt operator*(wxInt32 n , const wxPoint2DInt& pt) 
{
    return wxPoint2DInt( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DInt operator*(wxDouble n , const wxPoint2DInt& pt) 
{
    return wxPoint2DInt( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DInt operator*(const wxPoint2DInt& pt , wxInt32 n) 
{
    return wxPoint2DInt( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DInt operator*(const wxPoint2DInt& pt , wxDouble n) 
{
    return wxPoint2DInt( pt.m_x * n , pt.m_y * n ) ;
}

inline wxPoint2DInt operator/(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2) 
{
    return wxPoint2DInt( pt1.m_x / pt2.m_x , pt1.m_y / pt2.m_y ) ;
}

inline wxPoint2DInt operator/(const wxPoint2DInt& pt , wxInt32 n) 
{
    return wxPoint2DInt( pt.m_x / n , pt.m_y / n ) ;
}

inline wxPoint2DInt operator/(const wxPoint2DInt& pt , wxDouble n) 
{
    return wxPoint2DInt( pt.m_x / n , pt.m_y / n ) ;
}

// wxRect2Ds are a axis-aligned rectangles, each side of the rect is parallel to the x- or m_y- axis. The rectangle is either defined by the 
// top left and bottom right corner, or by the top left corner and size. A point is contained within the rectangle if
// left <= x < right  and top <= m_y < bottom , thus it is a half open interval. 

class WXDLLEXPORT wxRect2DInt
{
public:
       wxRect2DInt() { m_x = m_y = m_width = m_height = 0 ; }
       wxRect2DInt(wxInt32 x, wxInt32 y, wxInt32 w, wxInt32 h) { m_x = x ; m_y = y ; m_width = w ;  m_height = h ; }
       wxRect2DInt(const wxPoint2DInt& topLeft, const wxPoint2DInt& bottomRight);
       wxRect2DInt(const wxPoint2DInt& pos, const wxSize& size);
       wxRect2DInt(const wxRect2DInt& rect);

        // single attribute accessors

      inline wxPoint2DInt GetPosition() { return wxPoint2DInt(m_x, m_y); }
       inline wxSize GetSize() { return wxSize(m_width, m_height); }

        // for the edge and corner accessors there are two setters conterparts, the Set.. functions keep the other corners at their
        // position whenever sensible, the Move.. functions keep the size of the rect and move the other corners apropriately

      inline wxInt32 GetLeft() const { return m_x; }
       inline void SetLeft( wxInt32 n ) { m_width += m_x - n ; m_x = n ; }
       inline void MoveLeftTo( wxInt32 n ) { m_x = n ; }
       inline wxInt32 GetTop() const { return m_y; }
       inline void SetTop( wxInt32 n ) { m_height += m_y - n ; m_y = n ; }
       inline void MoveTopTo( wxInt32 n ) { m_y = n ; }
       inline wxInt32 GetBottom() const { return m_y + m_height; }
       inline void SetBottom( wxInt32 n ) { m_height += n - (m_y+m_height) ;}
       inline void MoveBottomTo( wxInt32 n ) { m_y = n - m_height ; }
       inline wxInt32 GetRight() const { return m_x + m_width; }
       inline void SetRight( wxInt32 n ) { m_width += n - (m_x+m_width)  ; }
       inline void MoveRightTo( wxInt32 n ) { m_x = n - m_width ; }

        inline wxPoint2DInt GetLeftTop() const { return wxPoint2DInt( m_x , m_y ) ; }
        inline void SetLeftTop( const wxPoint2DInt &pt ) { m_width += m_x - pt.m_x ; m_height += m_y - pt.m_y ; m_x = pt.m_x ; m_y = pt.m_y ; }            
        inline void MoveLeftTopTo( const wxPoint2DInt &pt ) { m_x = pt.m_x ; m_y = pt.m_y ; }            
        inline wxPoint2DInt GetLeftBottom() const { return wxPoint2DInt( m_x , m_y + m_height ) ; }
        inline void SetLeftBottom( const wxPoint2DInt &pt ) { m_width += m_x - pt.m_x ; m_height += pt.m_y - (m_y+m_height)  ; m_x = pt.m_x ; }            
        inline void MoveLeftBottomTo( const wxPoint2DInt &pt ) { m_x = pt.m_x ; m_y = pt.m_y - m_height; }            
        inline wxPoint2DInt GetRightTop() const { return wxPoint2DInt( m_x+m_width , m_y ) ; }
        inline void SetRightTop( const wxPoint2DInt &pt ) { m_width += pt.m_x - ( m_x + m_width ) ; m_height += m_y - pt.m_y ; m_y = pt.m_y ; }            
        inline void MoveRightTopTo( const wxPoint2DInt &pt ) { m_x = pt.m_x - m_width ; m_y = pt.m_y ; }            
        inline wxPoint2DInt GetRightBottom() const { return wxPoint2DInt( m_x+m_width , m_y + m_height ) ; }
        inline void SetRightBottom( const wxPoint2DInt &pt ) { m_width += pt.m_x - ( m_x + m_width ) ; m_height += pt.m_y - (m_y+m_height) ;}            
        inline void MoveRightBottomTo( const wxPoint2DInt &pt ) { m_x = pt.m_x - m_width ; m_y = pt.m_y - m_height; }            
        inline wxPoint2DInt GetCentre() const { return wxPoint2DInt( m_x+m_width/2 , m_y+m_height/2 ) ; }
        inline void SetCentre( const wxPoint2DInt &pt ) { MoveCentreTo( pt ) ; }    // since this is impossible without moving...    
        inline void MoveCentreTo( const wxPoint2DInt &pt ) { m_x += pt.m_x - (m_x+m_width/2) , m_y += pt.m_y -(m_y+m_height/2) ; }                
        inline wxOutCode GetOutcode( const wxPoint2DInt &pt ) const
            { return (wxOutCode) (( ( pt.m_x < m_x ) ? wxOutLeft : 0 ) +
                     ( ( pt.m_x >= m_x + m_width ) ? wxOutRight : 0 ) +
                     ( ( pt.m_y < m_y ) ? wxOutTop : 0 )  +
                     ( ( pt.m_y >= m_y + m_height ) ? wxOutBottom : 0 )) ; }
        inline bool Contains( const wxPoint2DInt &pt ) const 
            { return  GetOutcode( pt ) == wxInside ; }
        inline bool Contains( const wxRect2DInt &rect ) const 
            { return ( ( ( m_x <= rect.m_x ) && ( rect.m_x + rect.m_width <= m_x + m_width ) ) && 
                ( ( m_y <= rect.m_y ) && ( rect.m_y + rect.m_height <= m_y + m_height ) ) ) ; }
        inline bool IsEmpty() const 
            { return ( m_width <= 0 || m_height <= 0 ) ; }
        inline bool HaveEqualSize( const wxRect2DInt &rect ) const 
            { return ( rect.m_width == m_width && rect.m_height == m_height ) ; }
        
        inline void Inset( wxInt32 x , wxInt32 y ) { m_x += x ; m_y += y ; m_width -= 2 * x ; m_height -= 2 * y ; }
        inline void Inset( wxInt32 left , wxInt32 top ,wxInt32 right , wxInt32 bottom  ) 
            { m_x += left ; m_y += top ; m_width -= left + right ; m_height -= top + bottom ;}
        inline void Offset( const wxPoint2DInt &pt ) { m_x += pt.m_x ; m_y += pt.m_y ; }
        void ConstrainTo( const wxRect2DInt &rect ) ;
        inline wxPoint2DInt Interpolate( wxInt32 widthfactor , wxInt32 heightfactor ) { return wxPoint2DInt( m_x + m_width * widthfactor , m_y + m_height * heightfactor ) ; }

        static void Intersect( const wxRect2DInt &src1 , const wxRect2DInt &src2 , wxRect2DInt *dest ) ;
        inline void Intersect( const wxRect2DInt &otherRect ) { Intersect( *this , otherRect , this ) ; }
        inline wxRect2DInt CreateIntersection( const wxRect2DInt &otherRect ) const { wxRect2DInt result ; Intersect( *this , otherRect , &result) ; return result ; }
        bool Intersects( const wxRect2DInt &rect ) const ;

        static void Union( const wxRect2DInt &src1 , const wxRect2DInt &src2 , wxRect2DInt *dest ) ;
        void Union( const wxRect2DInt &otherRect )  { Union( *this , otherRect , this ) ; }
        void Union( const wxPoint2DInt &pt ) ;
        inline wxRect2DInt CreateUnion( const wxRect2DInt &otherRect ) const { wxRect2DInt result ; Union( *this , otherRect , &result) ; return result ; }

        inline void Scale( wxInt32 f ) { m_x *= f ; m_y *= f ; m_width *= f ; m_height *= f ;} 
        inline void Scale( wxInt32 num , wxInt32 denum ) 
            { m_x *= ((wxInt32)num)/((wxInt32)denum) ; m_y *= ((wxInt32)num)/((wxInt32)denum) ; 
                m_width *= ((wxInt32)num)/((wxInt32)denum) ; m_height *= ((wxInt32)num)/((wxInt32)denum) ;}

       wxRect2DInt& operator = (const wxRect2DInt& rect);
       bool operator == (const wxRect2DInt& rect);
       bool operator != (const wxRect2DInt& rect);

        void WriteTo( wxDataOutputStream &stream ) const ;
        void ReadFrom( wxDataInputStream &stream ) ;

       wxInt32 m_x ;
        wxInt32 m_y ;
        wxInt32 m_width;
        wxInt32 m_height;
};

inline wxRect2DInt::wxRect2DInt( const wxRect2DInt &r ) 
{ 
    m_x = r.m_x ; 
    m_y = r.m_y ; 
    m_width = r.m_width ; 
    m_height = r.m_height ; 
} 
        
inline wxRect2DInt::wxRect2DInt( const wxPoint2DInt &a , const wxPoint2DInt &b) 
{ 
    m_x = wxMin( a.m_x , b.m_x ) ; 
    m_y = wxMin( a.m_y , b.m_y ) ; 
    m_width = abs( a.m_x - b.m_x ) ; 
    m_height = abs( a.m_y - b.m_y ) ; 
} 

class wxTransform2D
{
public :
    virtual void                    Transform( wxPoint2DInt* pt )const  = 0 ;
    virtual void                    Transform( wxRect2DInt* r ) const ;
    virtual wxPoint2DInt    Transform( const wxPoint2DInt &pt ) const ;
    virtual wxRect2DInt        Transform( const wxRect2DInt &r ) const  ;

    virtual void                    InverseTransform( wxPoint2DInt* pt ) const  = 0;
    virtual void                    InverseTransform( wxRect2DInt* r ) const  ;
    virtual wxPoint2DInt    InverseTransform( const wxPoint2DInt &pt ) const  ;
    virtual wxRect2DInt        InverseTransform( const wxRect2DInt &r ) const  ;
} ;

inline void    wxTransform2D::Transform( wxRect2DInt* r ) const 
{ wxPoint2DInt a = r->GetLeftTop() , b = r->GetRightBottom() ; Transform( &a ) ; Transform( &b ) ; *r = wxRect2DInt( a , b ) ; }

inline wxPoint2DInt    wxTransform2D::Transform( const wxPoint2DInt &pt ) const 
{ wxPoint2DInt res = pt ; Transform( &res ) ; return res ; }

inline wxRect2DInt     wxTransform2D::Transform( const wxRect2DInt &r ) const  
{ wxRect2DInt res = r ; Transform( &res ) ; return res ; }

inline void    wxTransform2D::InverseTransform( wxRect2DInt* r ) const 
{ wxPoint2DInt a = r->GetLeftTop() , b = r->GetRightBottom() ; InverseTransform( &a ) ; InverseTransform( &b ) ; *r = wxRect2DInt( a , b ) ; }

inline wxPoint2DInt    wxTransform2D::InverseTransform( const wxPoint2DInt &pt ) const  
{ wxPoint2DInt res = pt ; InverseTransform( &res ) ; return res ; }

inline wxRect2DInt     wxTransform2D::InverseTransform( const wxRect2DInt &r ) const  
{ wxRect2DInt res = r ; InverseTransform( &res ) ; return res ; }


#endif // wxUSE_GEOMETRY

#endif // _WX_GEOMETRY_H_