Expose scaled mazes to special level lua

Adds a new level init type which directly creates a maze,
optionally setting corridor width and wall thickness,
and removing dead ends.

des.level_init({ style = "maze", corrwid = 3, wallthick = 1, deadends = false });

doc/lua.adoc

@@ -329,6 +329,7 @@ Example:
 
  des.level_init({ style = "solidfill", fg = " " });
  des.level_init({ style = "mines", fg = ".", bg = "}", smoothed=1, joined=1, lit=0 })
+ des.level_init({ style = "maze", corrwid = 3, wallthick = 1, deadends = false });
 
 === levregion
 

include/extern.h

@@ -1340,6 +1340,7 @@ E boolean FDECL(litstate_rnd, (int));
 
 /* ### mkmaze.c ### */
 
+E void FDECL(create_maze, (int, int, BOOLEAN_P));
 E void FDECL(wallification, (int, int, int, int));
 E void FDECL(fix_wall_spines, (int, int, int, int));
 E void FDECL(walkfrom, (int, int, SCHAR_P));

include/sp_lev.h

@@ -38,6 +38,7 @@ enum lvlinit_types {
     LVLINIT_NONE = 0,
     LVLINIT_SOLIDFILL,
     LVLINIT_MAZEGRID,
+    LVLINIT_MAZE,
     LVLINIT_MINES,
     LVLINIT_ROGUE,
     LVLINIT_SWAMP
@@ -110,6 +111,8 @@ typedef struct {
     boolean smoothed, joined;
     xchar lit, walled;
     boolean icedpools;
+    int corrwid, wallthick;
+    boolean rm_deadends;
 } lev_init;
 
 typedef struct {

src/mkmaze.c

@@ -26,7 +26,6 @@ static void FDECL(shiny_orc_stuff, (struct monst *));
 static void NDECL(stolen_booty);
 static boolean FDECL(maze_inbounds, (int, int));
 static void FDECL(maze_remove_deadends, (XCHAR_P));
-static void FDECL(create_maze, (int, int));
 
 /* adjust a coordinate one step in the specified direction */
 #define mz_move(X, Y, dir) \
@@ -842,10 +841,10 @@ xchar typ;
 /* Create a maze with specified corridor width and wall thickness
  * TODO: rewrite walkfrom so it works on temp space, not levl
  */
-static void
-create_maze(corrwid, wallthick)
-int corrwid;
-int wallthick;
+void
+create_maze(corrwid, wallthick, rmdeadends)
+int corrwid, wallthick;
+boolean rmdeadends;
 {
     int x,y;
     coord mm;
@@ -855,6 +854,12 @@ int wallthick;
     int rdy = 0;
     int scale;
 
+    if (corrwid == -1)
+        corrwid = rnd(4);
+
+    if (wallthick == -1)
+        wallthick = rnd(4) - corrwid;
+
     if (wallthick < 1)
         wallthick = 1;
     else if (wallthick > 5)
@@ -886,7 +891,7 @@ int wallthick;
     maze0xy(&mm);
     walkfrom((int) mm.x, (int) mm.y, 0);
 
-    if (!rn2(5))
+    if (rmdeadends)
         maze_remove_deadends((g.level.flags.corrmaze) ? CORR : ROOM);
 
     /* restore bounds */
@@ -1004,10 +1009,9 @@ const char *s;
     g.level.flags.corrmaze = !rn2(3);
 
     if (!Invocation_lev(&u.uz) && rn2(2)) {
-        int corrscale = rnd(4);
-        create_maze(corrscale,rnd(4)-corrscale);
+        create_maze(-1, -1, !rn2(5));
     } else {
-        create_maze(1,1);
+        create_maze(1, 1, FALSE);
     }
 
     if (!g.level.flags.corrmaze)

src/sp_lev.c

@@ -2901,6 +2901,9 @@ lev_init *linit;
     case LVLINIT_MAZEGRID:
         lvlfill_maze_grid(2, 0, g.x_maze_max, g.y_maze_max, linit->bg);
         break;
+    case LVLINIT_MAZE:
+        create_maze(linit->corrwid, linit->wallthick, linit->rm_deadends);
+        break;
     case LVLINIT_ROGUE:
         makeroguerooms();
         break;
@@ -3574,10 +3577,10 @@ lspo_level_init(L)
 lua_State *L;
 {
     static const char *const initstyles[] = {
-        "solidfill", "mazegrid", "rogue", "mines", "swamp", NULL
+        "solidfill", "mazegrid", "maze", "rogue", "mines", "swamp", NULL
     };
     static const int initstyles2i[] = {
-        LVLINIT_SOLIDFILL, LVLINIT_MAZEGRID, LVLINIT_ROGUE,
+        LVLINIT_SOLIDFILL, LVLINIT_MAZEGRID, LVLINIT_MAZE, LVLINIT_ROGUE,
         LVLINIT_MINES, LVLINIT_SWAMP, 0
     };
     lev_init init_lev;
@@ -3597,6 +3600,9 @@ lua_State *L;
     init_lev.lit = get_table_int_or_random(L, "lit", -1); /* TODO: allow lit=BOOL */
     init_lev.walled = get_table_boolean_opt(L, "walled", 0);
     init_lev.filling = get_table_mapchr_opt(L, "filling", init_lev.fg);
+    init_lev.corrwid = get_table_int_opt(L, "corrwid", -1);
+    init_lev.wallthick = get_table_int_opt(L, "wallthick", -1);
+    init_lev.rm_deadends = !get_table_boolean_opt(L, "deadends", 1);
 
     g.coder->lvl_is_joined = init_lev.joined;