Addendum to previous commit: Added files mentioned but forgotten.

diff --git a/src/map.c b/src/map.c
new file mode 100644 (file)
index 0000000..6ee6774
--- /dev/null
+++ b/src/map.c
@@ -0,0 +1,51 @@
+#include "map.h"
+#include <stdlib.h>
+#include <stdint.h>
+#include "roguelike.h"
+#include "objects_on_map.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); }
+

diff --git a/src/map.h b/src/map.h
new file mode 100644 (file)
index 0000000..c5ceb94
--- /dev/null
+++ b/src/map.h
@@ -0,0 +1,17 @@
+#ifndef MAP_H
+#define MAP_H
+
+#include "yx_uint16.h"
+
+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);
+
+#endif