server/random_maps/square_spiral.C

/*
 * CrossFire, A Multiplayer game for X-windows
 * 
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * 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;
  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:	1.9
Committed:	Sat Jan 27 02:19:37 2007 UTC (17 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_0, rel-2_1
Changes since 1.8:	+13 -11 lines
Log Message:	- experimentall.y determine minimum random map size (12) - harden random map generator by stresstesting - reduced codesize while increasing readability (RANDOM => rndm) - fixed a likely unimportant bug in random_roll64 - possibly broke lots of code
#	Content
1	/*
2	* CrossFire, A Multiplayer game for X-windows
3	*
4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	* Copyright (C) 2001 Mark Wedel & Crossfire Development Team
6	* Copyright (C) 1992 Frank Tore Johansen
7	*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation; either version 2 of the License, or
11	* (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	* 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 GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	*
22	* The authors can be reached via e-mail at <crossfire@schmorp.de>
23	*/
24
25
26	/* peterm@langmuir.eecs.berkeley.edu: this function generates a random
27	snake-type layout.
28
29	input: xsize, ysize;
30	output: a char** array with # and . for closed and open respectively.
31
32	a char value of 0 represents a blank space: a '#' is
33	a wall.
34
35	*/
36
37
38	#include <stdio.h>
39	#include <global.h>
40	#include <time.h>
41
42	#include <maze_gen.h>
43	#include <room_gen.h>
44	#include <random_map.h>
45	#include <sproto.h>
46	#include <rproto.h>
47
48
49	char **map_gen_onion (int xsize, int ysize, int option, int layers);
50
51
52	/* These are some helper functions which help with
53	manipulating a centered onion and turning it into
54	a square spiral */
55
56	/* this starts from within a centered onion layer (or between two layers),
57	and looks up until it finds a wall, and then looks right until it
58	finds a vertical wall, i.e., the corner. It sets cx and cy to that.
59	it also starts from cx and cy. */
60
61	void
62	find_top_left_corner (char *maze, int cx, int *cy)
63	{
64	--(*cy);
65
66	/* find the top wall. */
67	while (maze[cx][cy] == 0)
68	--(*cy);
69
70	/* proceed right until a corner is detected */
71	while (maze[cx][cy + 1] == 0)
72	++(*cx);
73
74	/* cx and cy should now be the top-right corner of the onion layer */
75	}
76
77
78	char **
79	make_square_spiral_layout (int xsize, int ysize, int options)
80	{
81	int i, j;
82	int cx, cy;
83	int tx, ty;
84
85	/* generate and allocate a doorless, centered onion */
86	char **maze = map_gen_onion (xsize, ysize, RMOPT_CENTERED \| RMOPT_NO_DOORS, 0);
87
88	/* find the layout center. */
89	cx = 0;
90	cy = 0;
91	for (i = 0; i < xsize; i++)
92	for (j = 0; j < ysize; j++)
93	if (maze[i][j] == 'C')
94	{
95	cx = i;
96	cy = j;
97	}
98
99	tx = cx;
100	ty = cy;
101	for (;;)
102	{
103	find_top_left_corner (maze, &tx, &ty);
104
105	if (ty < 2 \|\| tx < 2 \|\| tx > xsize - 2 \|\| ty > ysize - 2)
106	break;
107
108	make_wall (maze, tx, ty - 1, 1); /* make a vertical wall with a door */
109
110	maze[tx][ty - 1] = '#'; /* convert the door that make_wall puts here to a wall */
111	maze[tx - 1][ty] = 'D'; /* make a doorway out of this layer */
112
113	/* walk left until we find the top-left corner */
114	while ((tx > 2) && maze[tx - 1][ty])
115	tx--;
116
117	make_wall (maze, tx - 1, ty, 0); /* make a horizontal wall with a door */
118
119	/* walk down until we find the bottom-left corner */
120	while (((ty + 1) < ysize) && maze[tx][ty + 1])
121	ty++;
122
123	make_wall (maze, tx, ty + 1, 1); /* make a vertical wall with a door */
124
125	/* walk rightuntil we find the bottom-right corner */
126	while (((tx + 1) < xsize) && maze[tx + 1][ty])
127	tx++;
128
129	make_wall (maze, tx + 1, ty, 0); /* make a horizontal wall with a door */
130	tx++; /* set up for next layer. */
131	}
132
133	/* place the exits. */
134
135	if (rndm (2))
136	{
137	maze[cx][cy] = '>';
138	maze[xsize - 2][1] = '<';
139	}
140	else
141	{
142	maze[cx][cy] = '<';
143	maze[xsize - 2][1] = '>';
144	}
145
146	return maze;
147	}
148