mirror of https://github.com/OpenTTD/OpenTTD.git
123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
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/* $Id$ */
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/** @file direction_type.h Different types to 'show' directions. */
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#ifndef DIRECTION_TYPE_H
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#define DIRECTION_TYPE_H
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#include "core/enum_type.hpp"
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/**
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* Defines the 8 directions on the map.
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*
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* This enum defines 8 possible directions which are used for
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* the vehicles in the game. The directions are aligned straight
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* to the viewport, not to the map. So north points to the top of
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* your viewport and not rotated by 45 degrees left or right to get
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* a "north" used in you games.
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*/
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enum Direction {
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DIR_BEGIN = 0, ///< Used to iterate
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DIR_N = 0, ///< North
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DIR_NE = 1, ///< Northeast
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DIR_E = 2, ///< East
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DIR_SE = 3, ///< Southeast
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DIR_S = 4, ///< South
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DIR_SW = 5, ///< Southwest
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DIR_W = 6, ///< West
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DIR_NW = 7, ///< Northwest
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DIR_END, ///< Used to iterate
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INVALID_DIR = 0xFF, ///< Flag for an invalid direction
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};
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/** Define basic enum properties */
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template <> struct EnumPropsT<Direction> : MakeEnumPropsT<Direction, byte, DIR_BEGIN, DIR_END, INVALID_DIR> {};
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typedef TinyEnumT<Direction> DirectionByte; //typedefing-enumification of Direction
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/**
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* Enumeration for the difference between two directions.
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*
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* This enumeration is used to mark differences between
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* two directions. If you get one direction you can align
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* a second direction in 8 different ways. This enumeration
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* only contains 6 of these 8 differences, but the remaining
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* two can be calculated by adding to differences together.
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* This also means you can add two differences together and
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* get the difference you really want to get. The difference
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* of 45 degrees left + the difference of 45 degrees right results in the
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* difference of 0 degrees.
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*
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* @note To get this mentioned addition of direction you must use
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* modulo DIR_END or use the #ChangeDirDiff(DirDiff, DirDiff) function.
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* @see ChangeDirDiff(DirDiff, DirDiff)
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*/
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enum DirDiff {
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DIRDIFF_SAME = 0, ///< Both directions faces to the same direction
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DIRDIFF_45RIGHT = 1, ///< Angle of 45 degrees right
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DIRDIFF_90RIGHT = 2, ///< Angle of 90 degrees right
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DIRDIFF_REVERSE = 4, ///< One direction is the opposit of the other one
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DIRDIFF_90LEFT = 6, ///< Angle of 90 degrees left
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DIRDIFF_45LEFT = 7 ///< Angle of 45 degrees left
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};
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/**
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* Enumeration for diagonal directions.
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*
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* This enumeration is used for the 4 direction of the tile-edges.
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*/
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enum DiagDirection {
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DIAGDIR_BEGIN = 0, ///< Used for iterations
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DIAGDIR_NE = 0, ///< Northeast, upper right on your monitor
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DIAGDIR_SE = 1, ///< Southeast
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DIAGDIR_SW = 2, ///< Southwest
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DIAGDIR_NW = 3, ///< Northwest
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DIAGDIR_END, ///< Used for iterations
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INVALID_DIAGDIR = 0xFF, ///< Flag for an invalid DiagDirection
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};
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DECLARE_POSTFIX_INCREMENT(DiagDirection);
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/** Define basic enum properties */
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template <> struct EnumPropsT<DiagDirection> : MakeEnumPropsT<DiagDirection, byte, DIAGDIR_BEGIN, DIAGDIR_END, INVALID_DIAGDIR> {};
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typedef TinyEnumT<DiagDirection> DiagDirectionByte; //typedefing-enumification of DiagDirection
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/**
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* Enumeration for the difference between to DiagDirection.
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*
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* As the DiagDirection only contains 4 possible directions the
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* difference between two of these directions can only be in 4 ways.
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* As the DirDiff enumeration the values can be added together and
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* you will get the resulting difference (use modulo DIAGDIR_END).
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*
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* @see DirDiff
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*/
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enum DiagDirDiff {
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DIAGDIRDIFF_SAME = 0, ///< Same directions
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DIAGDIRDIFF_90RIGHT = 1, ///< 90 degrees right
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DIAGDIRDIFF_REVERSE = 2, ///< Reverse directions
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DIAGDIRDIFF_90LEFT = 3 ///< 90 degrees left
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};
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/** Allow incrementing of DiagDirDiff variables */
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DECLARE_POSTFIX_INCREMENT(DiagDirDiff);
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/**
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* Enumeration for the two axis X and Y
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*
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* This enumeration represente the two axis X and Y in the game.
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* The X axis is the one which goes align the north-west edge
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* (and south-east edge). The Y axis must be so the one which goes
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* align the north-east edge (and south-west) edge.
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*/
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enum Axis {
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AXIS_X = 0, ///< The X axis
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AXIS_Y = 1, ///< The y axis
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AXIS_END ///< Used for iterations
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};
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#endif /* DIRECTION_TYPE_H */
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