contrib/include/wx/canvas/liner.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        liner.h
   3 // Author:      Klaas Holwerda
   4 // Created:     1/10/2000
   5 // Copyright:   2000 (c) Klaas Holwerda
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8 #ifndef __WXLINER_H
   9 #define __WXLINER_H
  10
  11 #ifdef __GNUG__
  12     #pragma interface "liner.cpp"
  13 #endif
  14
  15
  16 #include "wx/geometry.h"
  17
  18 enum OUTPRODUCT {R_IS_LEFT,R_IS_ON,R_IS_RIGHT};
  19
  20 // Status of a point to a wxLine
  21 enum R_PointStatus {R_LEFT_SIDE, R_RIGHT_SIDE, R_ON_AREA, R_IN_AREA};
  22
  23 class wxLine
  24 {
  25 public:
  26     // constructors and destructor
  27     wxLine( double x1, double y1, double x2, double y2 );
  28     wxLine( const wxPoint2DDouble& a, const wxPoint2DDouble& b);
  29     ~wxLine();
  30
  31     wxPoint2DDouble GetBeginPoint();                               // Get the beginpoint from a wxLine
  32     wxPoint2DDouble GetEndPoint();                                 // Get the endpoint from a wxLine
  33     bool            CheckIntersect( wxLine&, double Marge); // Check if two wxLines intersects
  34     int             Intersect( wxLine&,  wxPoint2DDouble& bp ,wxPoint2DDouble& ep ,double Marge) ;   // Intersects two wxLines
  35     bool            Intersect( wxLine& lijn, wxPoint2DDouble& crossing); //intersect two (infinit) lines
  36     R_PointStatus   PointOnLine( const wxPoint2DDouble& a_Point, double& Distance, double Marge ); //For an infinite wxLine
  37     R_PointStatus   PointInLine( const wxPoint2DDouble& a_Point, double& Distance, double Marge ); //For a non-infinite wxLine
  38     OUTPRODUCT      OutProduct( const wxLine& two, double accur);              // outproduct of two wxLines
  39     double          Calculate_Y( double X);                                 // Caclulate Y if X is known
  40     void            Virtual_Point( wxPoint2DDouble& a_point, double distance) const;
  41     wxLine&         operator=( const wxLine&);                              // assignment operator
  42     void            CalculateLineParameters();                                  // Calculate the parameters if nessecary
  43     void            OffsetContour( const wxLine& nextline, double factor,wxPoint2DDouble& offsetpoint) const;
  44
  45 private:
  46
  47     int   ActionOnTable1(R_PointStatus,R_PointStatus);                          // Function needed for Intersect
  48     int   ActionOnTable2(R_PointStatus,R_PointStatus);                          // Function needed for Intersect
  49
  50     double      m_AA;
  51     double      m_BB;
  52     double      m_CC;
  53     wxPoint2DDouble m_a;
  54     wxPoint2DDouble m_b;
  55     bool        m_valid_parameters;
  56 };
  57
  58 #endif