From 83d75731b23c1e7acda3d9d72bcf22fef49315be Mon Sep 17 00:00:00 2001 From: Christian Heller Date: Thu, 25 Jul 2013 23:58:48 +0200 Subject: [PATCH] Applied new style and documentation requirements to map library; also some minor code fixes. --- src/map.c | 131 ++++++++++++++++++++++++++++++++++-------------------- src/map.h | 48 ++++++++++++++++---- 2 files changed, 122 insertions(+), 57 deletions(-) diff --git a/src/map.c b/src/map.c index 394f818..44a0057 100644 --- a/src/map.c +++ b/src/map.c @@ -1,50 +1,83 @@ #include "map.h" -#include -#include -#include "misc.h" -#include "map_objects.h" - -struct Map init_map () { -// Initialize map with some experimental start values. - struct Map map; - map.size.x = 64; - map.size.y = 64; - map.offset.x = 0; - map.offset.y = 0; - uint32_t size = map.size.x * map.size.y; - map.cells = malloc(size); - uint16_t y, x; - for (y = 0; y < map.size.y; y++) - for (x = 0; x < map.size.x; x++) - map.cells[(y * map.size.x) + x] = '~'; - map.cells[size / 2 + (map.size.x / 2)] = '.'; - uint32_t curpos; - while (1) { - y = rrand(0, 0) % map.size.y; - x = rrand(0, 0) % map.size.x; - curpos = y * map.size.x + x; - if ('~' == map.cells[curpos] && - ( (curpos >= map.size.x && '.' == map.cells[curpos - map.size.x]) - || (curpos < map.size.x * (map.size.y-1) && '.' == map.cells[curpos + map.size.x]) - || (curpos > 0 && curpos % map.size.x != 0 && '.' == map.cells[curpos-1]) - || (curpos < (map.size.x * map.size.y) && (curpos+1) % map.size.x != 0 && '.' == map.cells[curpos+1]))) { - if (y == 0 || y == map.size.y - 1 || x == 0 || x == map.size.x - 1) - break; - map.cells[y * map.size.x + x] = '.'; } } - return map; } - -void map_scroll (struct Map * map, char dir, struct yx_uint16 win_size) { -// Scroll map into direction dir if possible by changing the offset. - if (NORTH == dir && map->offset.y > 0) - map->offset.y--; - else if (WEST == dir && map->offset.x > 0) - map->offset.x--; - else if (SOUTH == dir && map->offset.y + win_size.y < map->size.y) - map->offset.y++; - else if (EAST == dir && map->offset.x + win_size.x < map->size.x) - map->offset.x++; } - -void map_center_player (struct Map * map, struct Player * player, struct yx_uint16 frame_size) { -// Center map on player. - map->offset.y = center_offset (player->pos.y, map->size.y, frame_size.y); - map->offset.x = center_offset (player->pos.x, map->size.x, frame_size.x); } +#include /* for malloc() */ +#include /* for uint16_t, uint32_t */ +#include "misc.h" /* for rrand() and center_offset() */ +#include "map_objects.h" /* for Player struct */ +#include "yx_uint16.h" /* for yx_uint16 and dir enums */ + + + +struct Map init_map () +{ + struct Map map; + map.size.x = 64; + map.size.y = 64; + map.offset.x = 0; + map.offset.y = 0; + uint32_t size = map.size.x * map.size.y; + map.cells = malloc(size); + uint16_t y, x; + for (y = 0; y < map.size.y; y++) + { + for (x = 0; x < map.size.x; x++) + { + map.cells[(y * map.size.x) + x] = '~'; + } + } + map.cells[size / 2 + (map.size.x / 2)] = '.'; + uint32_t curpos; + while (1) + { + y = rrand(0, 0) % map.size.y; + x = rrand(0, 0) % map.size.x; + curpos = y * map.size.x + x; + if ('~' == map.cells[curpos] + && ((curpos >= map.size.x && '.' == map.cells[curpos - map.size.x]) + || (curpos < map.size.x * (map.size.y-1) + && '.' == map.cells[curpos + map.size.x]) + || (curpos > 0 && curpos % map.size.x != 0 + && '.' == map.cells[curpos-1]) + || (curpos < (map.size.x * map.size.y) + && (curpos+1) % map.size.x != 0 + && '.' == map.cells[curpos+1]))) + { + if (y == 0 || y == map.size.y - 1 || x == 0 || x == map.size.x - 1) + { + break; + } + map.cells[y * map.size.x + x] = '.'; + } + } + return map; +} + + + +void map_scroll (struct Map * map, enum dir d, struct yx_uint16 win_size) +{ + if (NORTH == d && map->offset.y > 0) + { + map->offset.y--; + } + else if (WEST == d && map->offset.x > 0) + { + map->offset.x--; + } + else if (SOUTH == d && map->offset.y + win_size.y < map->size.y) + { + map->offset.y++; + } + else if (EAST == d && map->offset.x + win_size.x < map->size.x) + { + map->offset.x++; + } +} + + + +void map_center_player(struct Map * map, struct Player * player, + struct yx_uint16 win_size) +{ + map->offset.y = center_offset (player->pos.y, map->size.y, win_size.y); + map->offset.x = center_offset (player->pos.x, map->size.x, win_size.x); +} diff --git a/src/map.h b/src/map.h index c5ceb94..9bcd11b 100644 --- a/src/map.h +++ b/src/map.h @@ -1,17 +1,49 @@ +/* map.h + * + * Struct for the game map and routines to manipulate it. + */ + #ifndef MAP_H #define MAP_H -#include "yx_uint16.h" + +#include "yx_uint16.h" /* for yx_uint16 and dir enums */ struct Player; -struct Map { - struct yx_uint16 size; - struct yx_uint16 offset; - char * cells; }; -extern struct Map init_map (); -extern void map_scroll (struct Map *, char, struct yx_uint16); -extern void map_center_player (struct Map *, struct Player *, struct yx_uint16); + +struct Map +{ + struct yx_uint16 size; /* map's height/width in number of cells */ + struct yx_uint16 offset; /* the map scroll offset */ + char * cells; /* sequence of bytes encoding map cells */ +}; + + + +/* Initialize an island map as 64 x 64 cells of "~" cells representing water and + * "." cells representing land. The shape of the island is generated randomly by + * starting with a sea containing one land cell in the middle and then going + * into a cycle of repeatedly selecting a random cell on the map and + * transforming it into a land cell if it is horizontally or vertically neighbor + * to one. The cycle ends when a land cell is created that is only one cell away + * from the edge of the map. The map scroll offset is initialized to 0,0. + */ +extern struct Map init_map(); + +/* Scroll map into direction "dir" by changing the scroll offset if that does + * not push the map view beyond the size of the map window as described by + * "win_size". + */ +extern void map_scroll(struct Map * map, enum dir d, struct yx_uint16 win_size); + +/* Scroll map to center on the player by changing the scroll offset as far as is + * possible sans leaving the size of the map window as described by "win_size". + */ +extern void map_center_player(struct Map * map, struct Player * player, + struct yx_uint16 win_size); + + #endif -- 2.30.2