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 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 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 */

/* 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 cx and cy to that.
   it also starts from cx and cy. */

void
find_top_left_corner (char **maze, int *cx, int *cy)
{
  --(*cy);

  /* find the top wall. */
  while (maze[*cx][*cy] == 0)
    --(*cy);

  /* proceed right until a corner is detected */
  while (maze[*cx][*cy + 1] == 0)
    ++(*cx);

  /* cx and cy should now be the top-right corner of the onion layer */
}

Maze
make_square_spiral_layout (int xsize, int ysize, int options)
{
  int i, j;
  int cx, cy;
  int tx, ty;

  /* generate and allocate a doorless, centered onion */
  Maze maze = map_gen_onion (xsize, ysize, RMOPT_CENTERED | RMOPT_NO_DOORS, 0);

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

  tx = cx;
  ty = cy;
  for (;;)
    {
      find_top_left_corner (maze, &tx, &ty);

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

  return maze;
}

Revision:	1.12
Committed:	Fri Apr 11 21:09:53 2008 UTC (16 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.11:	+6 -17 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.11	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	pippijn	1.7	*
4	root	1.12	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.10	* Copyright (©) 2001,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.7	*
8	root	1.11	* Deliantra is free software: you can redistribute it and/or modify
9	pippijn	1.7	* it under the terms of the GNU General Public License as published by
10	root	1.10	* the Free Software Foundation, either version 3 of the License, or
11	pippijn	1.7	* (at your 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	root	1.10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	pippijn	1.7	* GNU General Public License for more details.
17			*
18			* You should have received a copy of the GNU General Public License
19	root	1.10	* along with this program. If not, see <http://www.gnu.org/licenses/>.
20			*
21	root	1.11	* The authors can be reached via e-mail to <support@deliantra.net>
22	pippijn	1.7	*/
23	elmex	1.1
24			/* peterm@langmuir.eecs.berkeley.edu: this function generates a random
25			snake-type layout.
26
27			input: xsize, ysize;
28			output: a char** array with # and . for closed and open respectively.
29
30			a char value of 0 represents a blank space: a '#' is
31			a wall.
32
33			*/
34
35			#include <global.h>
36
37	root	1.12	#include "random_map.h"
38			#include "rproto.h"
39	elmex	1.1
40			/* These are some helper functions which help with
41			manipulating a centered onion and turning it into
42			a square spiral */
43
44			/* this starts from within a centered onion layer (or between two layers),
45			and looks up until it finds a wall, and then looks right until it
46			finds a vertical wall, i.e., the corner. It sets cx and cy to that.
47			it also starts from cx and cy. */
48
49	root	1.2	void
50			find_top_left_corner (char *maze, int cx, int *cy)
51			{
52	root	1.9	--(*cy);
53	elmex	1.1
54			/* find the top wall. */
55	root	1.2	while (maze[cx][cy] == 0)
56	root	1.9	--(*cy);
57
58	elmex	1.1	/* proceed right until a corner is detected */
59	root	1.2	while (maze[cx][cy + 1] == 0)
60	root	1.9	++(*cx);
61	root	1.2
62	elmex	1.1	/* cx and cy should now be the top-right corner of the onion layer */
63			}
64
65	root	1.12	Maze
66	root	1.2	make_square_spiral_layout (int xsize, int ysize, int options)
67			{
68			int i, j;
69			int cx, cy;
70			int tx, ty;
71	elmex	1.1
72			/* generate and allocate a doorless, centered onion */
73	root	1.12	Maze maze = map_gen_onion (xsize, ysize, RMOPT_CENTERED \| RMOPT_NO_DOORS, 0);
74	elmex	1.1
75			/* find the layout center. */
76	root	1.2	cx = 0;
77			cy = 0;
78			for (i = 0; i < xsize; i++)
79			for (j = 0; j < ysize; j++)
80	root	1.9	if (maze[i][j] == 'C')
81			{
82			cx = i;
83			cy = j;
84			}
85
86	root	1.2	tx = cx;
87			ty = cy;
88	root	1.9	for (;;)
89	root	1.2	{
90			find_top_left_corner (maze, &tx, &ty);
91
92			if (ty < 2 \|\| tx < 2 \|\| tx > xsize - 2 \|\| ty > ysize - 2)
93			break;
94	root	1.9
95	root	1.2	make_wall (maze, tx, ty - 1, 1); /* make a vertical wall with a door */
96
97			maze[tx][ty - 1] = '#'; /* convert the door that make_wall puts here to a wall */
98			maze[tx - 1][ty] = 'D'; /* make a doorway out of this layer */
99	elmex	1.1
100	root	1.2	/* walk left until we find the top-left corner */
101	root	1.12	while ((tx > 2) && maze[tx - 1, ty])
102	root	1.2	tx--;
103	elmex	1.1
104	root	1.2	make_wall (maze, tx - 1, ty, 0); /* make a horizontal wall with a door */
105	elmex	1.1
106	root	1.2	/* walk down until we find the bottom-left corner */
107			while (((ty + 1) < ysize) && maze[tx][ty + 1])
108			ty++;
109	elmex	1.1
110	root	1.2	make_wall (maze, tx, ty + 1, 1); /* make a vertical wall with a door */
111	elmex	1.1
112	root	1.2	/* walk rightuntil we find the bottom-right corner */
113			while (((tx + 1) < xsize) && maze[tx + 1][ty])
114			tx++;
115	elmex	1.1
116	root	1.2	make_wall (maze, tx + 1, ty, 0); /* make a horizontal wall with a door */
117			tx++; /* set up for next layer. */
118			}
119	elmex	1.1
120			/* place the exits. */
121
122	root	1.8	if (rndm (2))
123	root	1.2	{
124			maze[cx][cy] = '>';
125			maze[xsize - 2][1] = '<';
126			}
127			else
128			{
129			maze[cx][cy] = '<';
130			maze[xsize - 2][1] = '>';
131			}
132
133	elmex	1.1	return maze;
134			}
135	root	1.9