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Location: cpp/openttd-patchpack/source/direction.h
r3303:1bae0f5399a4
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(svn r4060) -Codechange: [OSX] made the release target (in os/macosx/Makefile) easier to use since it gives the release disk image the right name automatically
it now uses REV instead of RELEASE, which means RELEASE is not needed to be set manaully anymore
it also automatically adds "-jaguar" when making a build aimed at OSX 10.2 (codenamed jaguar)
it now uses REV instead of RELEASE, which means RELEASE is not needed to be set manaully anymore
it also automatically adds "-jaguar" when making a build aimed at OSX 10.2 (codenamed jaguar)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | /* $Id$ */
#ifndef DIRECTION_H
#define DIRECTION_H
/* Direction as commonly used in v->direction, 8 way. */
typedef enum Direction {
DIR_N = 0,
DIR_NE = 1, /* Northeast, upper right on your monitor */
DIR_E = 2,
DIR_SE = 3,
DIR_S = 4,
DIR_SW = 5,
DIR_W = 6,
DIR_NW = 7,
DIR_END,
INVALID_DIR = 0xFF,
} Direction;
static inline Direction ReverseDir(Direction d)
{
return (Direction)(4 ^ d);
}
typedef enum DirDiff {
DIRDIFF_SAME = 0,
DIRDIFF_45RIGHT = 1,
DIRDIFF_90RIGHT = 2,
DIRDIFF_REVERSE = 4,
DIRDIFF_90LEFT = 6,
DIRDIFF_45LEFT = 7
} DirDiff;
static inline DirDiff DirDifference(Direction d0, Direction d1)
{
return (DirDiff)((d0 + 8 - d1) % 8);
}
static inline DirDiff ChangeDirDiff(DirDiff d, DirDiff delta)
{
return (DirDiff)((d + delta) % 8);
}
static inline Direction ChangeDir(Direction d, DirDiff delta)
{
return (Direction)((d + delta) % 8);
}
/* Direction commonly used as the direction of entering and leaving tiles, 4-way */
typedef enum DiagDirection {
DIAGDIR_NE = 0, /* Northeast, upper right on your monitor */
DIAGDIR_SE = 1,
DIAGDIR_SW = 2,
DIAGDIR_NW = 3,
DIAGDIR_END,
INVALID_DIAGDIR = 0xFF,
} DiagDirection;
static inline DiagDirection ReverseDiagDir(DiagDirection d)
{
return (DiagDirection)(2 ^ d);
}
typedef enum DiagDirDiff {
DIAGDIRDIFF_SAME = 0,
DIAGDIRDIFF_90RIGHT = 1,
DIAGDIRDIFF_REVERSE = 2,
DIAGDIRDIFF_90LEFT = 3
} DiagDirDiff;
static inline DiagDirection ChangeDiagDir(DiagDirection d, DiagDirDiff delta)
{
return (DiagDirection)((d + delta) % 4);
}
static inline DiagDirection DirToDiagDir(Direction dir)
{
return (DiagDirection)(dir >> 1);
}
static inline Direction DiagDirToDir(DiagDirection dir)
{
return (Direction)(dir * 2 + 1);
}
/* the 2 axis */
typedef enum Axis {
AXIS_X = 0,
AXIS_Y = 1
} Axis;
static inline Axis DiagDirToAxis(DiagDirection d)
{
return (Axis)(d & 1);
}
/*
* Converts an Axis to a DiagDirection
* Points always in the positive direction, i.e. S[EW]
*/
static inline DiagDirection AxisToDiagDir(Axis a)
{
return (DiagDirection)(2 - a);
}
#endif
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