server/random_maps/square_spiral.C

/*
    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@schmorp.de>
*/


/* 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, 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;
  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:	1.4
Committed:	Sat Dec 30 18:45:28 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+1 -1 lines
Log Message:	random maps are nphard
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2001 Mark Wedel & Crossfire Development Team
5			Copyright (C) 1992 Frank Tore Johansen
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	root	1.3	The authors can be reached via e-mail at <crossfire@schmorp.de>
22	elmex	1.1	*/
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
37			#include <stdio.h>
38			#include <global.h>
39			#include <time.h>
40
41			#include <maze_gen.h>
42			#include <room_gen.h>
43			#include <random_map.h>
44			#include <sproto.h>
45			#include <rproto.h>
46
47
48	root	1.2	char **map_gen_onion (int xsize, int ysize, int option, int layers);
49	elmex	1.1
50
51			/* These are some helper functions which help with
52			manipulating a centered onion and turning it into
53			a square spiral */
54
55			/* this starts from within a centered onion layer (or between two layers),
56			and looks up until it finds a wall, and then looks right until it
57			finds a vertical wall, i.e., the corner. It sets cx and cy to that.
58			it also starts from cx and cy. */
59
60	root	1.2	void
61			find_top_left_corner (char *maze, int cx, int *cy)
62			{
63	elmex	1.1
64			(*cy)--;
65			/* find the top wall. */
66	root	1.2	while (maze[cx][cy] == 0)
67			(*cy)--;
68	elmex	1.1	/* proceed right until a corner is detected */
69	root	1.2	while (maze[cx][cy + 1] == 0)
70			(*cx)++;
71
72	elmex	1.1	/* cx and cy should now be the top-right corner of the onion layer */
73			}
74
75
76	root	1.2	char **
77			make_square_spiral_layout (int xsize, int ysize, int options)
78			{
79			int i, j;
80			int cx, cy;
81			int tx, ty;
82	elmex	1.1
83			/* generate and allocate a doorless, centered onion */
84	root	1.4	char **maze = map_gen_onion (xsize, ysize, RMOPT_CENTERED \| RMOPT_NO_DOORS, 0);
85	elmex	1.1
86			/* find the layout center. */
87	root	1.2	cx = 0;
88			cy = 0;
89			for (i = 0; i < xsize; i++)
90			for (j = 0; j < ysize; j++)
91			{
92			if (maze[i][j] == 'C')
93			{
94			cx = i;
95			cy = j;
96			}
97	elmex	1.1	}
98	root	1.2	tx = cx;
99			ty = cy;
100			while (1)
101			{
102			find_top_left_corner (maze, &tx, &ty);
103
104			if (ty < 2 \|\| tx < 2 \|\| tx > xsize - 2 \|\| ty > ysize - 2)
105			break;
106			make_wall (maze, tx, ty - 1, 1); /* make a vertical wall with a door */
107
108			maze[tx][ty - 1] = '#'; /* convert the door that make_wall puts here to a wall */
109			maze[tx - 1][ty] = 'D'; /* make a doorway out of this layer */
110	elmex	1.1
111	root	1.2	/* walk left until we find the top-left corner */
112			while ((tx > 2) && maze[tx - 1][ty])
113			tx--;
114	elmex	1.1
115	root	1.2	make_wall (maze, tx - 1, ty, 0); /* make a horizontal wall with a door */
116	elmex	1.1
117	root	1.2	/* walk down until we find the bottom-left corner */
118			while (((ty + 1) < ysize) && maze[tx][ty + 1])
119			ty++;
120	elmex	1.1
121	root	1.2	make_wall (maze, tx, ty + 1, 1); /* make a vertical wall with a door */
122	elmex	1.1
123	root	1.2	/* walk rightuntil we find the bottom-right corner */
124			while (((tx + 1) < xsize) && maze[tx + 1][ty])
125			tx++;
126	elmex	1.1
127	root	1.2	make_wall (maze, tx + 1, ty, 0); /* make a horizontal wall with a door */
128			tx++; /* set up for next layer. */
129			}
130	elmex	1.1
131			/* place the exits. */
132
133	root	1.2	if (RANDOM () % 2)
134			{
135			maze[cx][cy] = '>';
136			maze[xsize - 2][1] = '<';
137			}
138			else
139			{
140			maze[cx][cy] = '<';
141			maze[xsize - 2][1] = '>';
142			}
143
144	elmex	1.1	return maze;
145			}