src/math/rect.h

   1 #ifndef RECT_H_
   2 #define RECT_H_
   3
   4 #include <SDL2/SDL.h>
   5
   6 #include "math/point.h"
   7
   8 typedef enum Rect_side {
   9     RECT_SIDE_LEFT = 0,
  10     RECT_SIDE_RIGHT,
  11     RECT_SIDE_TOP,
  12     RECT_SIDE_BOTTOM,
  13
  14     RECT_SIDE_N
  15 } Rect_side;
  16
  17 typedef struct Rect {
  18     float x, y, w, h;
  19 } Rect;
  20
  21 typedef struct Line {
  22     Point p1;
  23     Point p2;
  24 } Line;
  25
  26 Rect rect(float x, float y, float w, float h);
  27 Rect rect_from_vecs(Point position, Vec size);
  28 Rect rect_from_points(Point p1, Point p2);
  29 Rect rect_from_sdl(const SDL_Rect *rect);
  30
  31 Rect rects_overlap_area(Rect rect1, Rect rect2);
  32
  33 int rect_contains_point(Rect rect, Point p);
  34
  35 int rects_overlap(Rect rect1, Rect rect2);
  36
  37 void rect_object_impact(Rect object,
  38                         Rect obstacle,
  39                         int *sides);
  40
  41 Line rect_side(Rect rect, Rect_side side);
  42
  43 Rect rect_from_point(Point p, float w, float h);
  44
  45 float line_length(Line line);
  46
  47 SDL_Rect rect_for_sdl(Rect rect);
  48
  49 Vec rect_center(Rect rect);
  50
  51 Vec rect_snap(Rect pivot, Rect *rect);
  52 Vec rect_impulse(Rect *r1, Rect *r2);
  53
  54 #endif  // RECT_H_