gdt.h

   1 // This file is part of the utio library, a terminal I/O library.
   2 //
   3 // Copyright (C) 2004 by Mike Sharov <msharov@users.sourceforge.net>
   4 // This file is free software, distributed under the MIT License.
   5 //
   6 // gdt.h
   7 //
   8
   9 #ifndef GDT_H_10D99A7949ED8990743247ED3E6897DC
  10 #define GDT_H_10D99A7949ED8990743247ED3E6897DC
  11
  12 #include "ticonst.h"
  13
  14 namespace utio {
  15 /// Contains geometric primitive objects.
  16 namespace gdt {
  17
  18 typedef int16_t                 coord_t;        ///< A geometric coordinate.
  19 typedef uint16_t                dim_t;          ///< A dimension.
  20 typedef tuple<2, dim_t>         Size2d;         ///< A geometric size.
  21 typedef tuple<2, coord_t>       Point2d;        ///< A geometric point.
  22
  23 /// Represents a geometric rectangle.
  24 class Rect : public tuple<2, Point2d> {
  25 public:
  26     inline              Rect (const Rect& r)
  27                             : tuple<2, Point2d> (r) {}
  28     inline              Rect (coord_t x = 0, coord_t y = 0, dim_t w = 0, dim_t h = 0)
  29                             { at(0)[0] = x; at(0)[1] = y;
  30                               at(1)[0] = x + w; at(1)[1] = y + h; }
  31     inline              Rect (const Point2d& tl, const Point2d& br)
  32                             { at(0) = tl; at(1) = br; }
  33     inline              Rect (const Point2d& tl, const Size2d& wh)
  34                             { at(0) = at(1) = tl; at(1) += wh; }
  35     inline size_t       Width (void) const              { return (at(1)[0] - at(0)[0]); }
  36     inline size_t       Height (void) const             { return (at(1)[1] - at(0)[1]); }
  37     inline bool         Empty (void) const              { return (!Width() | !Height()); }
  38     inline Size2d       Size (void) const               { return (at(1) - at(0)); }
  39     inline void         Expand (coord_t d)              { at(0) -= d; at(1) += d; }
  40     inline const Rect&  operator+= (const Point2d& d)   { at(0) += d; at(1) += d; return (*this); }
  41     inline const Rect&  operator-= (const Point2d& d)   { at(0) -= d; at(1) -= d; return (*this); }
  42     inline const Rect&  operator+= (const Size2d& d)    { at(0) += d; at(1) += d; return (*this); }
  43     inline const Rect&  operator-= (const Size2d& d)    { at(0) -= d; at(1) -= d; return (*this); }
  44     inline Rect         operator+ (const Point2d& d) const      { Rect r (*this); r += d; return (r); }
  45     inline Rect         operator- (const Point2d& d) const      { Rect r (*this); r -= d; return (r); }
  46     inline Rect         operator+ (const Size2d& d) const       { Rect r (*this); r += d; return (r); }
  47     inline Rect         operator- (const Size2d& d) const       { Rect r (*this); r -= d; return (r); }
  48 };
  49
  50 } // namespace gdt
  51 } // namespace utio
  52
  53 #endif