rect.h

   1 #ifndef RECT_H
   2 #define RECT_H
   3
   4 #include "point.h"
   5
   6 typedef struct {
   7         point topleft;
   8         point bottomright;
   9 } rect;
  10
  11 #define rect_zero {{0,0},{0,0}}
  12
  13 #define width_from_rect(RECT_PTR) ((RECT_PTR)->bottomright.x + 1 - (RECT_PTR)->topleft.x)
  14 #define height_from_rect(RECT_PTR) ((RECT_PTR)->bottomright.y + 1 - (RECT_PTR)->topleft.y)
  15 #define make_rect(RECT_PTR, X1, Y1, X2, Y2) do { (RECT_PTR)->topleft.x = X1; (RECT_PTR)->topleft.y = Y1; \
  16                  (RECT_PTR)->bottomright.x = X2; (RECT_PTR)->bottomright.y = Y2; } while(0)
  17 #define point_in_rect(POINT_PTR, RECT_PTR) ((POINT_PTR)->x >= (RECT_PTR)->topleft.x && \
  18                                             (POINT_PTR)->x <= (RECT_PTR)->bottomright.x && \
  19                                             (POINT_PTR)->y >= (RECT_PTR)->topleft.y && \
  20                                             (POINT_PTR)->y <= (RECT_PTR)->bottomright.y )
  21 #define point_member_in_rect(POINT_PTR, RECT_PTR, IS_X) (\
  22                                             ((IS_X) ? ( \
  23                                              (POINT_PTR)->x >= (RECT_PTR)->topleft.x && \
  24                                              (POINT_PTR)->x <= (RECT_PTR)->bottomright.x \
  25                                             ) : ( \
  26                                              (POINT_PTR)->y >= (RECT_PTR)->topleft.y && \
  27                                              (POINT_PTR)->y <= (RECT_PTR)->bottomright.y \
  28                                             )))
  29
  30 #endif