include/vision.h

   1 /* NetHack 3.6  vision.h        $NHDT-Date: 1432512777 2015/05/25 00:12:57 $  $NHDT-Branch: master $:$NHDT-Revision: 1.9 $ */
   2 /* Copyright (c) Dean Luick, with acknowledgements to Dave Cohrs, 1990. */
   3 /* NetHack may be freely redistributed.  See license for details.       */
   4
   5 #ifndef VISION_H
   6 #define VISION_H
   7
   8 #if 0 /* (moved to decl.h) */
   9 extern boolean vision_full_recalc;      /* TRUE if need vision recalc */
  10 extern char **viz_array;                /* could see/in sight row pointers */
  11 extern char *viz_rmin;                  /* min could see indices */
  12 extern char *viz_rmax;                  /* max could see indices */
  13 #endif
  14 #define COULD_SEE 0x1 /* location could be seen, if it were lit */
  15 #define IN_SIGHT 0x2  /* location can be seen */
  16 #define TEMP_LIT 0x4  /* location is temporarily lit */
  17
  18 /*
  19  * Light source sources
  20  */
  21 #define LS_OBJECT 0
  22 #define LS_MONSTER 1
  23
  24 /*
  25  *  cansee()    - Returns true if the hero can see the location.
  26  *
  27  *  couldsee()  - Returns true if the hero has a clear line of sight to
  28  *                the location.
  29  */
  30 #define cansee(x, y) (viz_array[y][x] & IN_SIGHT)
  31 #define couldsee(x, y) (viz_array[y][x] & COULD_SEE)
  32 #define templit(x, y) (viz_array[y][x] & TEMP_LIT)
  33
  34 /*
  35  *  The following assume the monster is not blind.
  36  *
  37  *  m_cansee()  - Returns true if the monster can see the given location.
  38  *
  39  *  m_canseeu() - Returns true if the monster could see the hero.  Assumes
  40  *                that if the hero has a clear line of sight to the monster's
  41  *                location and the hero is visible, then monster can see the
  42  *                hero.
  43  */
  44 #define m_cansee(mtmp, x2, y2) clear_path((mtmp)->mx, (mtmp)->my, (x2), (y2))
  45
  46 #define m_canseeu(m)                                       \
  47     ((!Invis || perceives((m)->data))                      \
  48              && !(Underwater || u.uburied || (m)->mburied) \
  49          ? couldsee((m)->mx, (m)->my)                      \
  50          : 0)
  51
  52 /*
  53  *  Circle information
  54  */
  55 #define MAX_RADIUS 15 /* this is in points from the source */
  56
  57 /* Use this macro to get a list of distances of the edges (see vision.c). */
  58 #define circle_ptr(z) (&circle_data[(int) circle_start[z]])
  59
  60 /* howmonseen() bitmask values */
  61 #define MONSEEN_NORMAL 0x0001   /* normal vision */
  62 #define MONSEEN_SEEINVIS 0x0002 /* seeing invisible */
  63 #define MONSEEN_INFRAVIS 0x0004 /* via infravision */
  64 #define MONSEEN_TELEPAT 0x0008  /* via telepathy */
  65 #define MONSEEN_XRAYVIS 0x0010  /* via Xray vision */
  66 #define MONSEEN_DETECT 0x0020   /* via extended monster detection */
  67 #define MONSEEN_WARNMON 0x0040  /* via type-specific warning */
  68
  69 #endif /* VISION_H */