Moved map-specific functions into map.h / map.c library.

[plomrogue] / src / roguelike.c

diff --git a/src/roguelike.c b/src/roguelike.c
index c3078b285bc7892667b96e346089028f4c34968e..b44086aded843a3857baaf1872e7b54b67a06eb6 100644 (file)
--- a/src/roguelike.c
+++ b/src/roguelike.c
@@ -1,6 +1,5 @@
 #include "roguelike.h"
 #include <stdlib.h>
-#include <stdint.h>
 #include <ncurses.h>
 #include <string.h>
 #include <time.h>
@@ -10,6 +9,7 @@
 #include "keybindings.h"
 #include "readwrite.h"
 #include "objects_on_map.h"
+#include "map.h"
 
 uint16_t rrand(char use_seed, uint32_t new_seed) {
 // Pseudo-random number generator (LGC algorithm). Use instead of rand() to ensure portable predictability.
@@ -42,41 +42,16 @@ void update_log (struct World * world, char * text) {
   free(world->log);
   world->log = new_text; }
 
-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) {
-// Scroll map into direction dir if possible by changing the offset.
-  if      (NORTH == dir && map->offset.y > 0) map->offset.y--;
-  else if (SOUTH == dir)                      map->offset.y++;
-  else if (WEST  == dir && map->offset.x > 0) map->offset.x--;
-  else if (EAST  == dir)                      map->offset.x++; }
+uint16_t center_offset (uint16_t pos, uint16_t mapsize, uint16_t framesize) {
+// Return the offset for display of a map inside a frame centered on pos.
+  uint16_t offset = 0;
+  if (mapsize > framesize) {
+    if (pos > framesize / 2) {
+      if (pos < mapsize - (framesize / 2))
+        offset = pos - (framesize / 2);
+      else
+        offset = mapsize - framesize; } }
+  return offset; }
 
 void turn_over (struct World * world, char action) {
 // Record action in game record file, increment turn and move enemy.
@@ -167,13 +142,15 @@ unsigned char meta_keys(int key, struct World * world, struct WinMeta * win_meta
   else if (key == get_action_key(world->keybindings, "keys mod"))
     keyswin_mod_key (world, win_meta);
   else if (key == get_action_key(world->keybindings, "map up"))
-    map_scroll (world->map, NORTH);
+    map_scroll (world->map, NORTH, win_map->frame.size);
   else if (key == get_action_key(world->keybindings, "map down"))
-    map_scroll (world->map, SOUTH);
+    map_scroll (world->map, SOUTH, win_map->frame.size);
   else if (key == get_action_key(world->keybindings, "map right"))
-    map_scroll (world->map, EAST);
+    map_scroll (world->map, EAST, win_map->frame.size);
   else if (key == get_action_key(world->keybindings, "map left"))
-    map_scroll (world->map, WEST);
+    map_scroll (world->map, WEST, win_map->frame.size);
+  else if (key == get_action_key(world->keybindings, "map center player"))
+    map_center_player (world->map, world->player, win_map->frame.size);
   return 0; }
 
 int main (int argc, char *argv[]) {