00001
00005
00006 #ifndef _H_IMG_Line
00007 #define _H_IMG_Line
00008
00009 #include "IMG_Types.h"
00010 #include <math.h>
00011
00018
00019 class IMG_Line {
00020 public:
00021
00029 IMG_Line(TInt32 xs=0, TInt32 ys=0, TInt32 xe=0, TInt32 ye=0)
00030 : m_xs(xs), m_ys(ys), m_xe(xe), m_ye(ye) {}
00031
00036 IMG_Line(const IMG_Line& l)
00037 : m_xs(l.m_xs), m_ys(l.m_ys), m_xe(l.m_xe), m_ye(l.m_ye) {}
00038
00042 virtual ~IMG_Line() {};
00043
00048 virtual inline float getLength() const;
00049
00057 virtual inline void set(TInt32 xs, TInt32 ys, TInt32 xe, TInt32 ye);
00058
00064 virtual inline bool isEmpty() const;
00065
00073 virtual inline void getPoint(float t, TInt32& x, TInt32& y) const;
00074
00076 TInt32 m_xs;
00078 TInt32 m_ys;
00080 TInt32 m_xe;
00082 TInt32 m_ye;
00083 };
00084
00085
00086 inline float IMG_Line::getLength() const
00087 {
00088 TInt32 dx = m_xe - m_xs;
00089 TInt32 dy = m_ye - m_ys;
00090 return ((float)::sqrt(((float)dx)*dx + ((float)dy)*dy));
00091 }
00092
00093
00094 inline void IMG_Line::set(TInt32 xs, TInt32 ys, TInt32 xe, TInt32 ye)
00095 {
00096 m_xs = xs; m_ys = ys; m_xe = xe; m_ye = ye;
00097 }
00098
00099
00100 inline bool IMG_Line::isEmpty() const
00101 {
00102 return (getLength() <= 0);
00103 }
00104
00105
00106 inline void IMG_Line::getPoint(float t, TInt32& x, TInt32& y) const
00107 {
00108 x = (TInt32) (((float)m_xs) + (t * (m_xe - m_xs)));
00109 y = (TInt32) (((float)m_ys) + (t * (m_ye - m_ys)));
00110 }
00111
00112
00113 #endif // _H_IMG_Line
