crawl-ref/source/coord.cc

   1 #include "AppHdr.h"
   2
   3 #include "coord.h"
   4
   5 #include "random.h"
   6 #include "state.h"
   7 #include "viewgeom.h"
   8
   9 //////////////////////////////////////////////////////////////////////////
  10 // coord_def
  11 int coord_def::distance_from(const coord_def &other) const
  12 {
  13     return (grid_distance(*this, other));
  14 }
  15
  16 int grid_distance(const coord_def& p1, const coord_def& p2)
  17 {
  18     return ((p2 - p1).rdist());
  19 }
  20
  21 int distance(const coord_def& p1, const coord_def& p2)
  22 {
  23     return ((p2 - p1).abs());
  24 }
  25
  26 bool adjacent(const coord_def& p1, const coord_def& p2)
  27 {
  28     return grid_distance(p1, p2) <= 1;
  29 }
  30
  31 bool in_bounds_x(int x)
  32 {
  33     return (x > X_BOUND_1 && x < X_BOUND_2);
  34 }
  35
  36 bool in_bounds_y(int y)
  37 {
  38     return (y > Y_BOUND_1 && y < Y_BOUND_2);
  39 }
  40
  41 // Returns true if inside the area the player can move and dig (ie exclusive).
  42 bool in_bounds(int x, int y)
  43 {
  44     return (in_bounds_x(x) && in_bounds_y(y));
  45 }
  46
  47 bool map_bounds_x(int x)
  48 {
  49     return (x >= X_BOUND_1 && x <= X_BOUND_2);
  50 }
  51
  52 bool map_bounds_y(int y)
  53 {
  54     return (y >= Y_BOUND_1 && y <= Y_BOUND_2);
  55 }
  56
  57 // Returns true if inside the area the player can map (ie inclusive).
  58 // Note that terrain features should be in_bounds() leaving an outer
  59 // ring of rock to frame the level.
  60 bool map_bounds(int x, int y)
  61 {
  62     return (map_bounds_x(x) && map_bounds_y(y));
  63 }
  64
  65 bool map_bounds_with_margin(coord_def p, int margin)
  66 {
  67     return (p.x >= X_BOUND_1 + margin && p.x <= X_BOUND_2 - margin
  68             && p.y >= Y_BOUND_1 + margin && p.y <= Y_BOUND_2 - margin);
  69 }
  70
  71 coord_def random_in_bounds()
  72 {
  73     if (crawl_state.game_is_arena())
  74     {
  75         const coord_def &ul = crawl_view.glos1; // Upper left
  76         const coord_def &lr = crawl_view.glos2; // Lower right
  77
  78         return coord_def(random_range(ul.x, lr.x - 1),
  79                          random_range(ul.y, lr.y - 1));
  80     }
  81     else
  82         return coord_def(random_range(MAPGEN_BORDER, GXM - MAPGEN_BORDER - 1),
  83                          random_range(MAPGEN_BORDER, GYM - MAPGEN_BORDER - 1));
  84 }
  85
  86 // Coordinate system conversions.
  87
  88 coord_def player2grid(const coord_def &pc)
  89 {
  90     return (pc + you.pos());
  91 }
  92
  93 coord_def grid2player(const coord_def &gc)
  94 {
  95     return (gc - you.pos());
  96 }