server/random_maps/square_spiral.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2001,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero 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 Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

/* peterm@langmuir.eecs.berkeley.edu:  this function generates a random
snake-type layout.

input:  xsize, ysize;
output:  a char** array with # and . for closed and open respectively.

a char value of 0 represents a blank space:  a '#' is
a wall.

*/

#include <global.h>

#include "random_map.h"
#include "rproto.h"

/* These are some helper functions which help with
   manipulating a centered onion and turning it into
   a square spiral */
void
make_square_spiral_layout (Layout maze, int options)
{
  /* generate and allocate a doorless, centered onion */
  map_gen_onion (maze, RMOPT_CENTERED | RMOPT_NO_DOORS, 0);

  int xsize = maze->w;
  int ysize = maze->h;

  /* find the layout center.  */
  int cx = 0;
  int cy = 0;
  for (int i = 0; i < xsize; i++)
    for (int j = 0; j < ysize; j++)
      if (maze[i][j] == 'C')
        {
          cx = i;
          cy = j;
          break;
        }

  int tx = cx;
  int ty = cy;
  for (;;)
    {
      /* this starts from within a centered onion layer (or between two layers),
         and looks up until it finds a wall, and then looks right until it
         finds a vertical wall, i.e., the corner.  It sets tx and ty to that.
         it also starts from tx and ty. */
      --ty;

      /* find the top wall. */
      while (maze[tx][ty] != '#')
        --ty;

      /* proceed right until a corner is detected */
      while (maze[tx][ty + 1] != '#')
        ++tx;

      /* tx and ty should now be the top-right corner of the onion layer */
      if (ty < 2 || tx < 2 || tx > xsize - 2 || ty > ysize - 2)
        break;

      make_wall (maze, tx, ty - 1, 1);  /* make a vertical wall with a door */

      maze[tx][ty - 1] = '#';   /* convert the door that make_wall puts here to a wall */
      maze[tx - 1][ty] = 'D';   /* make a doorway out of this layer */

      /* walk left until we find the top-left corner */
      while (tx > 2 && maze[tx - 1][ty])
        --tx;

      make_wall (maze, tx - 1, ty, 0);  /* make a horizontal wall with a door */

      /* walk down until we find the bottom-left corner */
      while (ty + 1 < ysize && maze[tx][ty + 1])
        ++ty;

      make_wall (maze, tx, ty + 1, 1);  /* make a vertical wall with a door */

      /* walk rightuntil we find the bottom-right corner */
      while (tx + 1 < xsize && maze[tx + 1][ty])
        ++tx;

      make_wall (maze, tx + 1, ty, 0);  /* make a horizontal wall with a door */
      ++tx;                     /* set up for next layer. */
    }

  /* place the exits.  */

  if (rmg_rndm (2))
    {
      maze[cx][cy] = '>';
      maze[xsize - 2][1] = '<';
    }
  else
    {
      maze[cx][cy] = '<';
      maze[xsize - 2][1] = '>';
    }
}

Revision:	1.17
Committed:	Mon Oct 12 14:00:58 2009 UTC (16 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_82, rel-2_81, rel-2_90, rel-2_92, rel-2_93
Changes since 1.16:	+7 -6 lines
Log Message:	clarify license
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	* Copyright (©) 2001,2007 Mark Wedel & Crossfire Development Team
6	* Copyright (©) 1992,2007 Frank Tore Johansen
7	*
8	* Deliantra is free software: you can redistribute it and/or modify it under
9	* the terms of the Affero GNU General Public License as published by the
10	* Free Software Foundation, either version 3 of the License, or (at your
11	* option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the Affero GNU General Public License
19	* and the GNU General Public License along with this program. If not, see
20	* <http://www.gnu.org/licenses/>.
21	*
22	* The authors can be reached via e-mail to <support@deliantra.net>
23	*/
24
25	/* peterm@langmuir.eecs.berkeley.edu: this function generates a random
26	snake-type layout.
27
28	input: xsize, ysize;
29	output: a char** array with # and . for closed and open respectively.
30
31	a char value of 0 represents a blank space: a '#' is
32	a wall.
33
34	*/
35
36	#include <global.h>
37
38	#include "random_map.h"
39	#include "rproto.h"
40
41	/* These are some helper functions which help with
42	manipulating a centered onion and turning it into
43	a square spiral */
44	void
45	make_square_spiral_layout (Layout maze, int options)
46	{
47	/* generate and allocate a doorless, centered onion */
48	map_gen_onion (maze, RMOPT_CENTERED \| RMOPT_NO_DOORS, 0);
49
50	int xsize = maze->w;
51	int ysize = maze->h;
52
53	/* find the layout center. */
54	int cx = 0;
55	int cy = 0;
56	for (int i = 0; i < xsize; i++)
57	for (int j = 0; j < ysize; j++)
58	if (maze[i][j] == 'C')
59	{
60	cx = i;
61	cy = j;
62	break;
63	}
64
65	int tx = cx;
66	int ty = cy;
67	for (;;)
68	{
69	/* this starts from within a centered onion layer (or between two layers),
70	and looks up until it finds a wall, and then looks right until it
71	finds a vertical wall, i.e., the corner. It sets tx and ty to that.
72	it also starts from tx and ty. */
73	--ty;
74
75	/* find the top wall. */
76	while (maze[tx][ty] != '#')
77	--ty;
78
79	/* proceed right until a corner is detected */
80	while (maze[tx][ty + 1] != '#')
81	++tx;
82
83	/* tx and ty should now be the top-right corner of the onion layer */
84	if (ty < 2 \|\| tx < 2 \|\| tx > xsize - 2 \|\| ty > ysize - 2)
85	break;
86
87	make_wall (maze, tx, ty - 1, 1); /* make a vertical wall with a door */
88
89	maze[tx][ty - 1] = '#'; /* convert the door that make_wall puts here to a wall */
90	maze[tx - 1][ty] = 'D'; /* make a doorway out of this layer */
91
92	/* walk left until we find the top-left corner */
93	while (tx > 2 && maze[tx - 1][ty])
94	--tx;
95
96	make_wall (maze, tx - 1, ty, 0); /* make a horizontal wall with a door */
97
98	/* walk down until we find the bottom-left corner */
99	while (ty + 1 < ysize && maze[tx][ty + 1])
100	++ty;
101
102	make_wall (maze, tx, ty + 1, 1); /* make a vertical wall with a door */
103
104	/* walk rightuntil we find the bottom-right corner */
105	while (tx + 1 < xsize && maze[tx + 1][ty])
106	++tx;
107
108	make_wall (maze, tx + 1, ty, 0); /* make a horizontal wall with a door */
109	++tx; /* set up for next layer. */
110	}
111
112	/* place the exits. */
113
114	if (rmg_rndm (2))
115	{
116	maze[cx][cy] = '>';
117	maze[xsize - 2][1] = '<';
118	}
119	else
120	{
121	maze[cx][cy] = '<';
122	maze[xsize - 2][1] = '>';
123	}
124	}
125