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/**
* This file is part of Hercules.
* http://herc.ws - http://github.com/HerculesWS/Hercules
*
* Copyright (C) 2012-2019 Hercules Dev Team
* Copyright (C) Athena Dev Teams
*
* Hercules is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MAP_UNITDEFINES_H
#define MAP_UNITDEFINES_H
/**
* Used for directions, @see unit_data.dir
*/
enum unit_dir {
UNIT_DIR_UNDEFINED = -1,
UNIT_DIR_FIRST = 0,
UNIT_DIR_NORTH = 0,
UNIT_DIR_NORTHWEST = 1,
UNIT_DIR_WEST = 2,
UNIT_DIR_SOUTHWEST = 3,
UNIT_DIR_SOUTH = 4,
UNIT_DIR_SOUTHEAST = 5,
UNIT_DIR_EAST = 6,
UNIT_DIR_NORTHEAST = 7,
UNIT_DIR_MAX = 8,
/* IMPORTANT: Changing the order would break the above macros
* and several usages of directions anywhere */
};
/* Returns the opposite of the facing direction */
#define unit_get_opposite_dir(dir) ( ((dir) + 4) % UNIT_DIR_MAX )
/* Returns true when direction is diagonal/combined (ex. UNIT_DIR_NORTHWEST, UNIT_DIR_SOUTHWEST, ...) */
#define unit_is_diagonal_dir(dir) ( ((dir) % 2) == UNIT_DIR_NORTHWEST )
/* Returns true if direction equals val or the opposite direction of val */
#define unit_is_dir_or_opposite(dir, val) ( ((dir) % 4) == (val) )
/* Returns the next direction after 90° CCW on a compass */
#define unit_get_ccw90_dir(dir) ( ((dir) + 2) % UNIT_DIR_MAX )
/* Returns a random diagonal direction */
#define unit_get_rnd_diagonal_dir() ( UNIT_DIR_NORTHWEST + 2 * (rnd() % 4) )
#endif /* MAP_UNITDEFINES_H */
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