server/random_maps/room_gen_onion.C


/*
 * static char *room_gen_onion_c =
 *   "$Id: room_gen_onion.C,v 1.2 2006-08-29 08:01:36 root 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
*/


/*  The onion room generator:
Onion rooms are like this:

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

like this:
regular                       random
centered, linear onion        bottom/right centered, nonlinear

#########################     #########################
#                       #     #                       #
# ########  ##########  #     #   #####################
# #                  #  #     #   #                   #
# # ######  ######## #  #     #   #                   #
# # #              # #  #     #   #   ######## ########
# # # ####  ###### # #  #     #   #   #               #
# # # #          # # #  #     #   #   #               #
# # # ############ # #  #     #   #   #  ########### ##
# # #              # #  #     #   #   #  #            #
# # ################ #  #     #   #   #  #    #########
# #                  #  #     #       #  #    #       #
# ####################  #     #   #   #  #            #
#                       #     #   #   #  #    #       #
#########################     #########################

*/


#include <global.h>
#include <random_map.h>

#ifndef MIN
# define MIN(x,y) (((x)<(y))? (x):(y))
#endif
void centered_onion (char **maze, int xsize, int ysize, int option, int layers);
void bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
void bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers);


void draw_onion (char **maze, float *xlocations, float *ylocations, int layers);
void make_doors (char **maze, float *xlocations, float *ylocations, int layers, int options);

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

  /* allocate that array, set it up */
  char **maze = (char **) calloc (sizeof (char *), xsize);

  for (i = 0; i < xsize; i++)
    {
      maze[i] = (char *) calloc (sizeof (char), ysize);
    }

  /* pick some random options if option = 0 */
  if (option == 0)
    {
      switch (RANDOM () % 3)
        {
            case 0:
              option |= OPT_CENTERED;
              break;
            case 1:
              option |= OPT_BOTTOM_C;
              break;
            case 2:
              option |= OPT_BOTTOM_R;
              break;
        }
      if (RANDOM () % 2)
        option |= OPT_LINEAR;
      if (RANDOM () % 2)
        option |= OPT_IRR_SPACE;
    }

  /* write the outer walls, if appropriate. */
  if (!(option & OPT_WALL_OFF))
    {
      for (i = 0; i < xsize; i++)
        maze[i][0] = maze[i][ysize - 1] = '#';
      for (j = 0; j < ysize; j++)
        maze[0][j] = maze[xsize - 1][j] = '#';
    };

  if (option & OPT_WALLS_ONLY)
    return maze;

  /* pick off the mutually exclusive options */
  if (option & OPT_BOTTOM_R)
    bottom_right_centered_onion (maze, xsize, ysize, option, layers);
  else if (option & OPT_BOTTOM_C)
    bottom_centered_onion (maze, xsize, ysize, option, layers);
  else if (option & OPT_CENTERED)
    centered_onion (maze, xsize, ysize, option, layers);

  return maze;
}

void
centered_onion (char **maze, int xsize, int ysize, int option, int layers)
{
  int i, maxlayers;
  float *xlocations;
  float *ylocations;

  maxlayers = (MIN (xsize, ysize) - 2) / 5;
  if (!maxlayers)
    return;                     /* map too small to onionize */
  if (layers > maxlayers)
    layers = maxlayers;
  if (layers == 0)
    layers = (RANDOM () % maxlayers) + 1;
  xlocations = (float *) calloc (sizeof (float), 2 * layers);
  ylocations = (float *) calloc (sizeof (float), 2 * layers);


  /* place all the walls */
  if (option & OPT_IRR_SPACE)   /* randomly spaced */
    {
      int x_spaces_available, y_spaces_available;

      /* the "extra" spaces available for spacing between layers */
      x_spaces_available = (xsize - 2) - 6 * layers + 1;
      y_spaces_available = (ysize - 2) - 6 * layers + 1;


      /* pick an initial random pitch */
      for (i = 0; i < 2 * layers; i++)
        {
          float xpitch = 2, ypitch = 2;

          if (x_spaces_available > 0)
            xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;

          if (y_spaces_available > 0)
            ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
          xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
          ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
          x_spaces_available -= (int) (xpitch - 2);
          y_spaces_available -= (int) (ypitch - 2);
        }

    }
  if (!(option & OPT_IRR_SPACE))
    {                           /* evenly spaced */
      float xpitch, ypitch;     /* pitch of the onion layers */

      xpitch = (xsize - 2.0) / (2.0 * layers + 1);
      ypitch = (ysize - 2.0) / (2.0 * layers + 1);
      xlocations[0] = xpitch;
      ylocations[0] = ypitch;
      for (i = 1; i < 2 * layers; i++)
        {
          xlocations[i] = xlocations[i - 1] + xpitch;
          ylocations[i] = ylocations[i - 1] + ypitch;
        }
    }

  /* draw all the onion boxes.  */

  draw_onion (maze, xlocations, ylocations, layers);
  make_doors (maze, xlocations, ylocations, layers, option);

}

void
bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
{
  int i, maxlayers;
  float *xlocations;
  float *ylocations;

  maxlayers = (MIN (xsize, ysize) - 2) / 5;
  if (!maxlayers)
    return;                     /* map too small to onionize */
  if (layers > maxlayers)
    layers = maxlayers;
  if (layers == 0)
    layers = (RANDOM () % maxlayers) + 1;
  xlocations = (float *) calloc (sizeof (float), 2 * layers);
  ylocations = (float *) calloc (sizeof (float), 2 * layers);


  /* place all the walls */
  if (option & OPT_IRR_SPACE)   /* randomly spaced */
    {
      int x_spaces_available, y_spaces_available;

      /* the "extra" spaces available for spacing between layers */
      x_spaces_available = (xsize - 2) - 6 * layers + 1;
      y_spaces_available = (ysize - 2) - 3 * layers + 1;


      /* pick an initial random pitch */
      for (i = 0; i < 2 * layers; i++)
        {
          float xpitch = 2, ypitch = 2;

          if (x_spaces_available > 0)
            xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;

          if (y_spaces_available > 0)
            ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
          xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
          if (i < layers)
            ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
          else
            ylocations[i] = ysize - 1;
          x_spaces_available -= (int) (xpitch - 2);
          y_spaces_available -= (int) (ypitch - 2);
        }

    }
  if (!(option & OPT_IRR_SPACE))
    {                           /* evenly spaced */
      float xpitch, ypitch;     /* pitch of the onion layers */

      xpitch = (xsize - 2.0) / (2.0 * layers + 1);
      ypitch = (ysize - 2.0) / (layers + 1);
      xlocations[0] = xpitch;
      ylocations[0] = ypitch;
      for (i = 1; i < 2 * layers; i++)
        {
          xlocations[i] = xlocations[i - 1] + xpitch;
          if (i < layers)
            ylocations[i] = ylocations[i - 1] + ypitch;
          else
            ylocations[i] = ysize - 1;
        }
    }

  /* draw all the onion boxes.  */

  draw_onion (maze, xlocations, ylocations, layers);
  make_doors (maze, xlocations, ylocations, layers, option);

}


/*  draw_boxes:  draws the lines in the maze defining the onion layers */

void
draw_onion (char **maze, float *xlocations, float *ylocations, int layers)
{
  int i, j, l;

  for (l = 0; l < layers; l++)
    {
      int x1, x2, y1, y2;

      /* horizontal segments */
      y1 = (int) ylocations[l];
      y2 = (int) ylocations[2 * layers - l - 1];
      for (i = (int) xlocations[l]; i <= (int) xlocations[2 * layers - l - 1]; i++)
        {
          maze[i][y1] = '#';
          maze[i][y2] = '#';
        }

      /* vertical segments */
      x1 = (int) xlocations[l];
      x2 = (int) xlocations[2 * layers - l - 1];
      for (j = (int) ylocations[l]; j <= (int) ylocations[2 * layers - l - 1]; j++)
        {
          maze[x1][j] = '#';
          maze[x2][j] = '#';
        }

    }
}

void
make_doors (char **maze, float *xlocations, float *ylocations, int layers, int options)
{
  int freedoms;                 /* number of different walls on which we could place a door */
  int which_wall;               /* left, 1, top, 2, right, 3, bottom 4 */
  int l, x1 = 0, x2, y1 = 0, y2;

  freedoms = 4;                 /* centered */
  if (options & OPT_BOTTOM_C)
    freedoms = 3;
  if (options & OPT_BOTTOM_R)
    freedoms = 2;
  if (layers <= 0)
    return;
  /* pick which wall will have a door. */
  which_wall = RANDOM () % freedoms + 1;
  for (l = 0; l < layers; l++)
    {
      if (options & OPT_LINEAR)
        {                       /* linear door placement. */
          switch (which_wall)
            {
                case 1:
                  {             /* left hand wall */
                    x1 = (int) xlocations[l];
                    y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
                    break;
                  }
                case 2:
                  {             /* top wall placement */
                    x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
                    y1 = (int) ylocations[l];
                    break;
                  }
                case 3:
                  {             /* right wall placement */
                    x1 = (int) xlocations[2 * layers - l - 1];
                    y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
                    break;
                  }
                case 4:
                  {             /* bottom wall placement */
                    x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
                    y1 = (int) ylocations[2 * layers - l - 1];
                    break;
                  }
            }
        }
      else
        {                       /* random door placement. */
          which_wall = RANDOM () % freedoms + 1;
          switch (which_wall)
            {
                case 1:
                  {             /* left hand wall */
                    x1 = (int) xlocations[l];
                    y2 = (int) (ylocations[2 * layers - l - 1] - ylocations[l] - 1);
                    if (y2 > 0)
                      y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
                    else
                      y1 = (int) (ylocations[l] + 1);
                    break;
                  }
                case 2:
                  {             /* top wall placement */
                    x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
                    if (x2 > 0)
                      x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
                    else
                      x1 = (int) (xlocations[l] + 1);
                    y1 = (int) ylocations[l];
                    break;
                  }
                case 3:
                  {             /* right wall placement */
                    x1 = (int) xlocations[2 * layers - l - 1];
                    y2 = (int) ((-ylocations[l] + ylocations[2 * layers - l - 1])) - 1;
                    if (y2 > 0)
                      y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
                    else
                      y1 = (int) (ylocations[l] + 1);

                    break;
                  }
                case 4:
                  {             /* bottom wall placement */
                    x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
                    if (x2 > 0)
                      x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
                    else
                      x1 = (int) (xlocations[l] + 1);
                    y1 = (int) ylocations[2 * layers - l - 1];
                    break;
                  }

            }
        }
      if (options & OPT_NO_DOORS)
        maze[x1][y1] = '#';     /* no door. */
      else
        maze[x1][y1] = 'D';     /* write the door */

    }
  /* mark the center of the maze with a C */
  l = layers - 1;
  x1 = (int) (xlocations[l] + xlocations[2 * layers - l - 1]) / 2;
  y1 = (int) (ylocations[l] + ylocations[2 * layers - l - 1]) / 2;
  maze[x1][y1] = 'C';

  /* not needed anymore */
  free (xlocations);
  free (ylocations);

}

void
bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
{
  int i, maxlayers;
  float *xlocations;
  float *ylocations;

  maxlayers = (MIN (xsize, ysize) - 2) / 5;
  if (!maxlayers)
    return;                     /* map too small to onionize */
  if (layers > maxlayers)
    layers = maxlayers;
  if (layers == 0)
    layers = (RANDOM () % maxlayers) + 1;
  xlocations = (float *) calloc (sizeof (float), 2 * layers);
  ylocations = (float *) calloc (sizeof (float), 2 * layers);


  /* place all the walls */
  if (option & OPT_IRR_SPACE)   /* randomly spaced */
    {
      int x_spaces_available, y_spaces_available;

      /* the "extra" spaces available for spacing between layers */
      x_spaces_available = (xsize - 2) - 3 * layers + 1;
      y_spaces_available = (ysize - 2) - 3 * layers + 1;


      /* pick an initial random pitch */
      for (i = 0; i < 2 * layers; i++)
        {
          float xpitch = 2, ypitch = 2;

          if (x_spaces_available > 0)
            xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;

          if (y_spaces_available > 0)
            ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
          if (i < layers)
            xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
          else
            xlocations[i] = xsize - 1;

          if (i < layers)
            ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
          else
            ylocations[i] = ysize - 1;
          x_spaces_available -= (int) (xpitch - 2);
          y_spaces_available -= (int) (ypitch - 2);
        }

    }
  if (!(option & OPT_IRR_SPACE))
    {                           /* evenly spaced */
      float xpitch, ypitch;     /* pitch of the onion layers */

      xpitch = (xsize - 2.0) / (2.0 * layers + 1);
      ypitch = (ysize - 2.0) / (layers + 1);
      xlocations[0] = xpitch;
      ylocations[0] = ypitch;
      for (i = 1; i < 2 * layers; i++)
        {
          if (i < layers)
            xlocations[i] = xlocations[i - 1] + xpitch;
          else
            xlocations[i] = xsize - 1;
          if (i < layers)
            ylocations[i] = ylocations[i - 1] + ypitch;
          else
            ylocations[i] = ysize - 1;
        }
    }

  /* draw all the onion boxes.  */

  draw_onion (maze, xlocations, ylocations, layers);
  make_doors (maze, xlocations, ylocations, layers, option);

}
Revision:	1.3
Committed:	Sun Sep 10 16:06:37 2006 UTC (17 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+382 -302 lines
Log Message:	indent
#	Content
1
2	/*
3	* static char *room_gen_onion_c =
4	* "$Id: room_gen_onion.C,v 1.2 2006-08-29 08:01:36 root Exp $";
5	*/
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	/* The onion room generator:
32	Onion rooms are like this:
33
34	char **map_gen_onion(int xsize, int ysize, int option, int layers);
35
36	like this:
37	regular random
38	centered, linear onion bottom/right centered, nonlinear
39
40	######################### #########################
41	# # # #
42	# ######## ########## # # #####################
43	# # # # # # #
44	# # ###### ######## # # # # #
45	# # # # # # # # ######## ########
46	# # # #### ###### # # # # # # #
47	# # # # # # # # # # # #
48	# # # ############ # # # # # # ########### ##
49	# # # # # # # # # # #
50	# # ################ # # # # # # #########
51	# # # # # # # # #
52	# #################### # # # # # #
53	# # # # # # # #
54	######################### #########################
55
56	*/
57
58
59	#include <global.h>
60	#include <random_map.h>
61
62	#ifndef MIN
63	# define MIN(x,y) (((x)<(y))? (x):(y))
64	#endif
65	void centered_onion (char **maze, int xsize, int ysize, int option, int layers);
66	void bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
67	void bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
68
69
70	void draw_onion (char *maze, float xlocations, float *ylocations, int layers);
71	void make_doors (char *maze, float xlocations, float *ylocations, int layers, int options);
72
73	char **
74	map_gen_onion (int xsize, int ysize, int option, int layers)
75	{
76	int i, j;
77
78	/* allocate that array, set it up */
79	char maze = (char ) calloc (sizeof (char *), xsize);
80
81	for (i = 0; i < xsize; i++)
82	{
83	maze[i] = (char *) calloc (sizeof (char), ysize);
84	}
85
86	/* pick some random options if option = 0 */
87	if (option == 0)
88	{
89	switch (RANDOM () % 3)
90	{
91	case 0:
92	option \|= OPT_CENTERED;
93	break;
94	case 1:
95	option \|= OPT_BOTTOM_C;
96	break;
97	case 2:
98	option \|= OPT_BOTTOM_R;
99	break;
100	}
101	if (RANDOM () % 2)
102	option \|= OPT_LINEAR;
103	if (RANDOM () % 2)
104	option \|= OPT_IRR_SPACE;
105	}
106
107	/* write the outer walls, if appropriate. */
108	if (!(option & OPT_WALL_OFF))
109	{
110	for (i = 0; i < xsize; i++)
111	maze[i][0] = maze[i][ysize - 1] = '#';
112	for (j = 0; j < ysize; j++)
113	maze[0][j] = maze[xsize - 1][j] = '#';
114	};
115
116	if (option & OPT_WALLS_ONLY)
117	return maze;
118
119	/* pick off the mutually exclusive options */
120	if (option & OPT_BOTTOM_R)
121	bottom_right_centered_onion (maze, xsize, ysize, option, layers);
122	else if (option & OPT_BOTTOM_C)
123	bottom_centered_onion (maze, xsize, ysize, option, layers);
124	else if (option & OPT_CENTERED)
125	centered_onion (maze, xsize, ysize, option, layers);
126
127	return maze;
128	}
129
130	void
131	centered_onion (char **maze, int xsize, int ysize, int option, int layers)
132	{
133	int i, maxlayers;
134	float *xlocations;
135	float *ylocations;
136
137	maxlayers = (MIN (xsize, ysize) - 2) / 5;
138	if (!maxlayers)
139	return; /* map too small to onionize */
140	if (layers > maxlayers)
141	layers = maxlayers;
142	if (layers == 0)
143	layers = (RANDOM () % maxlayers) + 1;
144	xlocations = (float ) calloc (sizeof (float), 2 layers);
145	ylocations = (float ) calloc (sizeof (float), 2 layers);
146
147
148	/* place all the walls */
149	if (option & OPT_IRR_SPACE) /* randomly spaced */
150	{
151	int x_spaces_available, y_spaces_available;
152
153	/* the "extra" spaces available for spacing between layers */
154	x_spaces_available = (xsize - 2) - 6 * layers + 1;
155	y_spaces_available = (ysize - 2) - 6 * layers + 1;
156
157
158	/* pick an initial random pitch */
159	for (i = 0; i < 2 * layers; i++)
160	{
161	float xpitch = 2, ypitch = 2;
162
163	if (x_spaces_available > 0)
164	xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
165
166	if (y_spaces_available > 0)
167	ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
168	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
169	ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
170	x_spaces_available -= (int) (xpitch - 2);
171	y_spaces_available -= (int) (ypitch - 2);
172	}
173
174	}
175	if (!(option & OPT_IRR_SPACE))
176	{ /* evenly spaced */
177	float xpitch, ypitch; /* pitch of the onion layers */
178
179	xpitch = (xsize - 2.0) / (2.0 * layers + 1);
180	ypitch = (ysize - 2.0) / (2.0 * layers + 1);
181	xlocations[0] = xpitch;
182	ylocations[0] = ypitch;
183	for (i = 1; i < 2 * layers; i++)
184	{
185	xlocations[i] = xlocations[i - 1] + xpitch;
186	ylocations[i] = ylocations[i - 1] + ypitch;
187	}
188	}
189
190	/* draw all the onion boxes. */
191
192	draw_onion (maze, xlocations, ylocations, layers);
193	make_doors (maze, xlocations, ylocations, layers, option);
194
195	}
196
197	void
198	bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
199	{
200	int i, maxlayers;
201	float *xlocations;
202	float *ylocations;
203
204	maxlayers = (MIN (xsize, ysize) - 2) / 5;
205	if (!maxlayers)
206	return; /* map too small to onionize */
207	if (layers > maxlayers)
208	layers = maxlayers;
209	if (layers == 0)
210	layers = (RANDOM () % maxlayers) + 1;
211	xlocations = (float ) calloc (sizeof (float), 2 layers);
212	ylocations = (float ) calloc (sizeof (float), 2 layers);
213
214
215	/* place all the walls */
216	if (option & OPT_IRR_SPACE) /* randomly spaced */
217	{
218	int x_spaces_available, y_spaces_available;
219
220	/* the "extra" spaces available for spacing between layers */
221	x_spaces_available = (xsize - 2) - 6 * layers + 1;
222	y_spaces_available = (ysize - 2) - 3 * layers + 1;
223
224
225	/* pick an initial random pitch */
226	for (i = 0; i < 2 * layers; i++)
227	{
228	float xpitch = 2, ypitch = 2;
229
230	if (x_spaces_available > 0)
231	xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
232
233	if (y_spaces_available > 0)
234	ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
235	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
236	if (i < layers)
237	ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
238	else
239	ylocations[i] = ysize - 1;
240	x_spaces_available -= (int) (xpitch - 2);
241	y_spaces_available -= (int) (ypitch - 2);
242	}
243
244	}
245	if (!(option & OPT_IRR_SPACE))
246	{ /* evenly spaced */
247	float xpitch, ypitch; /* pitch of the onion layers */
248
249	xpitch = (xsize - 2.0) / (2.0 * layers + 1);
250	ypitch = (ysize - 2.0) / (layers + 1);
251	xlocations[0] = xpitch;
252	ylocations[0] = ypitch;
253	for (i = 1; i < 2 * layers; i++)
254	{
255	xlocations[i] = xlocations[i - 1] + xpitch;
256	if (i < layers)
257	ylocations[i] = ylocations[i - 1] + ypitch;
258	else
259	ylocations[i] = ysize - 1;
260	}
261	}
262
263	/* draw all the onion boxes. */
264
265	draw_onion (maze, xlocations, ylocations, layers);
266	make_doors (maze, xlocations, ylocations, layers, option);
267
268	}
269
270
271	/* draw_boxes: draws the lines in the maze defining the onion layers */
272
273	void
274	draw_onion (char *maze, float xlocations, float *ylocations, int layers)
275	{
276	int i, j, l;
277
278	for (l = 0; l < layers; l++)
279	{
280	int x1, x2, y1, y2;
281
282	/* horizontal segments */
283	y1 = (int) ylocations[l];
284	y2 = (int) ylocations[2 * layers - l - 1];
285	for (i = (int) xlocations[l]; i <= (int) xlocations[2 * layers - l - 1]; i++)
286	{
287	maze[i][y1] = '#';
288	maze[i][y2] = '#';
289	}
290
291	/* vertical segments */
292	x1 = (int) xlocations[l];
293	x2 = (int) xlocations[2 * layers - l - 1];
294	for (j = (int) ylocations[l]; j <= (int) ylocations[2 * layers - l - 1]; j++)
295	{
296	maze[x1][j] = '#';
297	maze[x2][j] = '#';
298	}
299
300	}
301	}
302
303	void
304	make_doors (char *maze, float xlocations, float *ylocations, int layers, int options)
305	{
306	int freedoms; /* number of different walls on which we could place a door */
307	int which_wall; /* left, 1, top, 2, right, 3, bottom 4 */
308	int l, x1 = 0, x2, y1 = 0, y2;
309
310	freedoms = 4; /* centered */
311	if (options & OPT_BOTTOM_C)
312	freedoms = 3;
313	if (options & OPT_BOTTOM_R)
314	freedoms = 2;
315	if (layers <= 0)
316	return;
317	/* pick which wall will have a door. */
318	which_wall = RANDOM () % freedoms + 1;
319	for (l = 0; l < layers; l++)
320	{
321	if (options & OPT_LINEAR)
322	{ /* linear door placement. */
323	switch (which_wall)
324	{
325	case 1:
326	{ /* left hand wall */
327	x1 = (int) xlocations[l];
328	y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
329	break;
330	}
331	case 2:
332	{ /* top wall placement */
333	x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
334	y1 = (int) ylocations[l];
335	break;
336	}
337	case 3:
338	{ /* right wall placement */
339	x1 = (int) xlocations[2 * layers - l - 1];
340	y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
341	break;
342	}
343	case 4:
344	{ /* bottom wall placement */
345	x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
346	y1 = (int) ylocations[2 * layers - l - 1];
347	break;
348	}
349	}
350	}
351	else
352	{ /* random door placement. */
353	which_wall = RANDOM () % freedoms + 1;
354	switch (which_wall)
355	{
356	case 1:
357	{ /* left hand wall */
358	x1 = (int) xlocations[l];
359	y2 = (int) (ylocations[2 * layers - l - 1] - ylocations[l] - 1);
360	if (y2 > 0)
361	y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
362	else
363	y1 = (int) (ylocations[l] + 1);
364	break;
365	}
366	case 2:
367	{ /* top wall placement */
368	x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
369	if (x2 > 0)
370	x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
371	else
372	x1 = (int) (xlocations[l] + 1);
373	y1 = (int) ylocations[l];
374	break;
375	}
376	case 3:
377	{ /* right wall placement */
378	x1 = (int) xlocations[2 * layers - l - 1];
379	y2 = (int) ((-ylocations[l] + ylocations[2 * layers - l - 1])) - 1;
380	if (y2 > 0)
381	y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
382	else
383	y1 = (int) (ylocations[l] + 1);
384
385	break;
386	}
387	case 4:
388	{ /* bottom wall placement */
389	x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
390	if (x2 > 0)
391	x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
392	else
393	x1 = (int) (xlocations[l] + 1);
394	y1 = (int) ylocations[2 * layers - l - 1];
395	break;
396	}
397
398	}
399	}
400	if (options & OPT_NO_DOORS)
401	maze[x1][y1] = '#'; /* no door. */
402	else
403	maze[x1][y1] = 'D'; /* write the door */
404
405	}
406	/* mark the center of the maze with a C */
407	l = layers - 1;
408	x1 = (int) (xlocations[l] + xlocations[2 * layers - l - 1]) / 2;
409	y1 = (int) (ylocations[l] + ylocations[2 * layers - l - 1]) / 2;
410	maze[x1][y1] = 'C';
411
412	/* not needed anymore */
413	free (xlocations);
414	free (ylocations);
415
416	}
417
418	void
419	bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
420	{
421	int i, maxlayers;
422	float *xlocations;
423	float *ylocations;
424
425	maxlayers = (MIN (xsize, ysize) - 2) / 5;
426	if (!maxlayers)
427	return; /* map too small to onionize */
428	if (layers > maxlayers)
429	layers = maxlayers;
430	if (layers == 0)
431	layers = (RANDOM () % maxlayers) + 1;
432	xlocations = (float ) calloc (sizeof (float), 2 layers);
433	ylocations = (float ) calloc (sizeof (float), 2 layers);
434
435
436	/* place all the walls */
437	if (option & OPT_IRR_SPACE) /* randomly spaced */
438	{
439	int x_spaces_available, y_spaces_available;
440
441	/* the "extra" spaces available for spacing between layers */
442	x_spaces_available = (xsize - 2) - 3 * layers + 1;
443	y_spaces_available = (ysize - 2) - 3 * layers + 1;
444
445
446	/* pick an initial random pitch */
447	for (i = 0; i < 2 * layers; i++)
448	{
449	float xpitch = 2, ypitch = 2;
450
451	if (x_spaces_available > 0)
452	xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
453
454	if (y_spaces_available > 0)
455	ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
456	if (i < layers)
457	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
458	else
459	xlocations[i] = xsize - 1;
460
461	if (i < layers)
462	ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
463	else
464	ylocations[i] = ysize - 1;
465	x_spaces_available -= (int) (xpitch - 2);
466	y_spaces_available -= (int) (ypitch - 2);
467	}
468
469	}
470	if (!(option & OPT_IRR_SPACE))
471	{ /* evenly spaced */
472	float xpitch, ypitch; /* pitch of the onion layers */
473
474	xpitch = (xsize - 2.0) / (2.0 * layers + 1);
475	ypitch = (ysize - 2.0) / (layers + 1);
476	xlocations[0] = xpitch;
477	ylocations[0] = ypitch;
478	for (i = 1; i < 2 * layers; i++)
479	{
480	if (i < layers)
481	xlocations[i] = xlocations[i - 1] + xpitch;
482	else
483	xlocations[i] = xsize - 1;
484	if (i < layers)
485	ylocations[i] = ylocations[i - 1] + ypitch;
486	else
487	ylocations[i] = ysize - 1;
488	}
489	}
490
491	/* draw all the onion boxes. */
492
493	draw_onion (maze, xlocations, ylocations, layers);
494	make_doors (maze, xlocations, ylocations, layers, option);
495
496	}