server/random_maps/square_spiral.C


/*
 * static char *rcsid_map_c =
 *   "$Id: square_spiral.C,v 1.1 2006-08-13 17:16:03 elmex Exp $";
 */

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2001 Mark Wedel & Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    This program 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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at crossfire-devel@real-time.com
*/


/* 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 <stdio.h>
#include <global.h>
#include <time.h>

#include <maze_gen.h>
#include <room_gen.h>
#include <random_map.h>
#include <sproto.h>
#include <rproto.h>


char **map_gen_onion (int xsize, int ysize, int option, int layers);


/* 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 */
}


char **
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 */
  char **maze = map_gen_onion (xsize, ysize, OPT_CENTERED | OPT_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;
  while (1)
    {
      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 (RANDOM () % 2)
    {
      maze[cx][cy] = '>';
      maze[xsize - 2][1] = '<';
    }
  else
    {
      maze[cx][cy] = '<';
      maze[xsize - 2][1] = '>';
    }

  return maze;
}
Revision:	1.2
Committed:	Sun Sep 10 16:06:37 2006 UTC (20 years ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+65 -49 lines
Log Message:	indent
#	User	Rev	Content
1	root	1.2
2	elmex	1.1	/*
3			* static char *rcsid_map_c =
4	root	1.2	* "$Id: square_spiral.C,v 1.1 2006-08-13 17:16:03 elmex Exp $";
5	elmex	1.1	*/
6
7			/*
8			CrossFire, A Multiplayer game for X-windows
9
10			Copyright (C) 2001 Mark Wedel & Crossfire Development Team
11			Copyright (C) 1992 Frank Tore Johansen
12
13			This program is free software; you can redistribute it and/or modify
14			it under the terms of the GNU General Public License as published by
15			the Free Software Foundation; either version 2 of the License, or
16			(at your option) any later version.
17
18			This program is distributed in the hope that it will be useful,
19			but WITHOUT ANY WARRANTY; without even the implied warranty of
20			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21			GNU General Public License for more details.
22
23			You should have received a copy of the GNU General Public License
24			along with this program; if not, write to the Free Software
25			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26
27			The authors can be reached via e-mail at crossfire-devel@real-time.com
28			*/
29
30
31			/* peterm@langmuir.eecs.berkeley.edu: this function generates a random
32			snake-type layout.
33
34			input: xsize, ysize;
35			output: a char** array with # and . for closed and open respectively.
36
37			a char value of 0 represents a blank space: a '#' is
38			a wall.
39
40			*/
41
42
43			#include <stdio.h>
44			#include <global.h>
45			#include <time.h>
46
47			#include <maze_gen.h>
48			#include <room_gen.h>
49			#include <random_map.h>
50			#include <sproto.h>
51			#include <rproto.h>
52
53
54	root	1.2	char **map_gen_onion (int xsize, int ysize, int option, int layers);
55	elmex	1.1
56
57			/* These are some helper functions which help with
58			manipulating a centered onion and turning it into
59			a square spiral */
60
61			/* this starts from within a centered onion layer (or between two layers),
62			and looks up until it finds a wall, and then looks right until it
63			finds a vertical wall, i.e., the corner. It sets cx and cy to that.
64			it also starts from cx and cy. */
65
66	root	1.2	void
67			find_top_left_corner (char *maze, int cx, int *cy)
68			{
69	elmex	1.1
70			(*cy)--;
71			/* find the top wall. */
72	root	1.2	while (maze[cx][cy] == 0)
73			(*cy)--;
74	elmex	1.1	/* proceed right until a corner is detected */
75	root	1.2	while (maze[cx][cy + 1] == 0)
76			(*cx)++;
77
78	elmex	1.1	/* cx and cy should now be the top-right corner of the onion layer */
79			}
80
81
82	root	1.2	char **
83			make_square_spiral_layout (int xsize, int ysize, int options)
84			{
85			int i, j;
86			int cx, cy;
87			int tx, ty;
88	elmex	1.1
89			/* generate and allocate a doorless, centered onion */
90	root	1.2	char **maze = map_gen_onion (xsize, ysize, OPT_CENTERED \| OPT_NO_DOORS, 0);
91	elmex	1.1
92			/* find the layout center. */
93	root	1.2	cx = 0;
94			cy = 0;
95			for (i = 0; i < xsize; i++)
96			for (j = 0; j < ysize; j++)
97			{
98			if (maze[i][j] == 'C')
99			{
100			cx = i;
101			cy = j;
102			}
103	elmex	1.1	}
104	root	1.2	tx = cx;
105			ty = cy;
106			while (1)
107			{
108			find_top_left_corner (maze, &tx, &ty);
109
110			if (ty < 2 \|\| tx < 2 \|\| tx > xsize - 2 \|\| ty > ysize - 2)
111			break;
112			make_wall (maze, tx, ty - 1, 1); /* make a vertical wall with a door */
113
114			maze[tx][ty - 1] = '#'; /* convert the door that make_wall puts here to a wall */
115			maze[tx - 1][ty] = 'D'; /* make a doorway out of this layer */
116	elmex	1.1
117	root	1.2	/* walk left until we find the top-left corner */
118			while ((tx > 2) && maze[tx - 1][ty])
119			tx--;
120	elmex	1.1
121	root	1.2	make_wall (maze, tx - 1, ty, 0); /* make a horizontal wall with a door */
122	elmex	1.1
123	root	1.2	/* walk down until we find the bottom-left corner */
124			while (((ty + 1) < ysize) && maze[tx][ty + 1])
125			ty++;
126	elmex	1.1
127	root	1.2	make_wall (maze, tx, ty + 1, 1); /* make a vertical wall with a door */
128	elmex	1.1
129	root	1.2	/* walk rightuntil we find the bottom-right corner */
130			while (((tx + 1) < xsize) && maze[tx + 1][ty])
131			tx++;
132	elmex	1.1
133	root	1.2	make_wall (maze, tx + 1, ty, 0); /* make a horizontal wall with a door */
134			tx++; /* set up for next layer. */
135			}
136	elmex	1.1
137			/* place the exits. */
138
139	root	1.2	if (RANDOM () % 2)
140			{
141			maze[cx][cy] = '>';
142			maze[xsize - 2][1] = '<';
143			}
144			else
145			{
146			maze[cx][cy] = '<';
147			maze[xsize - 2][1] = '>';
148			}
149
150	elmex	1.1	return maze;
151			}