server/random_maps/room_gen_onion.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>
*/


/*  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 |= RMOPT_CENTERED;
              break;
            case 1:
              option |= RMOPT_BOTTOM_C;
              break;
            case 2:
              option |= RMOPT_BOTTOM_R;
              break;
        }
      if (RANDOM () % 2)
        option |= RMOPT_LINEAR;
      if (RANDOM () % 2)
        option |= RMOPT_IRR_SPACE;
    }

  /* write the outer walls, if appropriate. */
  if (!(option & RMOPT_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 & RMOPT_WALLS_ONLY)
    return maze;

  /* pick off the mutually exclusive options */
  if (option & RMOPT_BOTTOM_R)
    bottom_right_centered_onion (maze, xsize, ysize, option, layers);
  else if (option & RMOPT_BOTTOM_C)
    bottom_centered_onion (maze, xsize, ysize, option, layers);
  else if (option & RMOPT_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 & RMOPT_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 & RMOPT_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 & RMOPT_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 & RMOPT_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 & RMOPT_BOTTOM_C)
    freedoms = 3;
  if (options & RMOPT_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 & RMOPT_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 & RMOPT_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 & RMOPT_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 & RMOPT_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:	1.5
Committed:	Sat Dec 30 18:45:28 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+20 -20 lines
Log Message:	random maps are nphard
#	Content
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	The authors can be reached via e-mail at <crossfire@schmorp.de>
22	*/
23
24
25	/* The onion room generator:
26	Onion rooms are like this:
27
28	char **map_gen_onion(int xsize, int ysize, int option, int layers);
29
30	like this:
31	regular random
32	centered, linear onion bottom/right centered, nonlinear
33
34	######################### #########################
35	# # # #
36	# ######## ########## # # #####################
37	# # # # # # #
38	# # ###### ######## # # # # #
39	# # # # # # # # ######## ########
40	# # # #### ###### # # # # # # #
41	# # # # # # # # # # # #
42	# # # ############ # # # # # # ########### ##
43	# # # # # # # # # # #
44	# # ################ # # # # # # #########
45	# # # # # # # # #
46	# #################### # # # # # #
47	# # # # # # # #
48	######################### #########################
49
50	*/
51
52
53	#include <global.h>
54	#include <random_map.h>
55
56	#ifndef MIN
57	# define MIN(x,y) (((x)<(y))? (x):(y))
58	#endif
59	void centered_onion (char **maze, int xsize, int ysize, int option, int layers);
60	void bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
61	void bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
62
63
64	void draw_onion (char *maze, float xlocations, float *ylocations, int layers);
65	void make_doors (char *maze, float xlocations, float *ylocations, int layers, int options);
66
67	char **
68	map_gen_onion (int xsize, int ysize, int option, int layers)
69	{
70	int i, j;
71
72	/* allocate that array, set it up */
73	char maze = (char ) calloc (sizeof (char *), xsize);
74
75	for (i = 0; i < xsize; i++)
76	{
77	maze[i] = (char *) calloc (sizeof (char), ysize);
78	}
79
80	/* pick some random options if option = 0 */
81	if (option == 0)
82	{
83	switch (RANDOM () % 3)
84	{
85	case 0:
86	option \|= RMOPT_CENTERED;
87	break;
88	case 1:
89	option \|= RMOPT_BOTTOM_C;
90	break;
91	case 2:
92	option \|= RMOPT_BOTTOM_R;
93	break;
94	}
95	if (RANDOM () % 2)
96	option \|= RMOPT_LINEAR;
97	if (RANDOM () % 2)
98	option \|= RMOPT_IRR_SPACE;
99	}
100
101	/* write the outer walls, if appropriate. */
102	if (!(option & RMOPT_WALL_OFF))
103	{
104	for (i = 0; i < xsize; i++)
105	maze[i][0] = maze[i][ysize - 1] = '#';
106	for (j = 0; j < ysize; j++)
107	maze[0][j] = maze[xsize - 1][j] = '#';
108	};
109
110	if (option & RMOPT_WALLS_ONLY)
111	return maze;
112
113	/* pick off the mutually exclusive options */
114	if (option & RMOPT_BOTTOM_R)
115	bottom_right_centered_onion (maze, xsize, ysize, option, layers);
116	else if (option & RMOPT_BOTTOM_C)
117	bottom_centered_onion (maze, xsize, ysize, option, layers);
118	else if (option & RMOPT_CENTERED)
119	centered_onion (maze, xsize, ysize, option, layers);
120
121	return maze;
122	}
123
124	void
125	centered_onion (char **maze, int xsize, int ysize, int option, int layers)
126	{
127	int i, maxlayers;
128	float *xlocations;
129	float *ylocations;
130
131	maxlayers = (MIN (xsize, ysize) - 2) / 5;
132	if (!maxlayers)
133	return; /* map too small to onionize */
134	if (layers > maxlayers)
135	layers = maxlayers;
136	if (layers == 0)
137	layers = (RANDOM () % maxlayers) + 1;
138	xlocations = (float ) calloc (sizeof (float), 2 layers);
139	ylocations = (float ) calloc (sizeof (float), 2 layers);
140
141
142	/* place all the walls */
143	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
144	{
145	int x_spaces_available, y_spaces_available;
146
147	/* the "extra" spaces available for spacing between layers */
148	x_spaces_available = (xsize - 2) - 6 * layers + 1;
149	y_spaces_available = (ysize - 2) - 6 * layers + 1;
150
151
152	/* pick an initial random pitch */
153	for (i = 0; i < 2 * layers; i++)
154	{
155	float xpitch = 2, ypitch = 2;
156
157	if (x_spaces_available > 0)
158	xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
159
160	if (y_spaces_available > 0)
161	ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
162	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
163	ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
164	x_spaces_available -= (int) (xpitch - 2);
165	y_spaces_available -= (int) (ypitch - 2);
166	}
167
168	}
169	if (!(option & RMOPT_IRR_SPACE))
170	{ /* evenly spaced */
171	float xpitch, ypitch; /* pitch of the onion layers */
172
173	xpitch = (xsize - 2.0) / (2.0 * layers + 1);
174	ypitch = (ysize - 2.0) / (2.0 * layers + 1);
175	xlocations[0] = xpitch;
176	ylocations[0] = ypitch;
177	for (i = 1; i < 2 * layers; i++)
178	{
179	xlocations[i] = xlocations[i - 1] + xpitch;
180	ylocations[i] = ylocations[i - 1] + ypitch;
181	}
182	}
183
184	/* draw all the onion boxes. */
185
186	draw_onion (maze, xlocations, ylocations, layers);
187	make_doors (maze, xlocations, ylocations, layers, option);
188
189	}
190
191	void
192	bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
193	{
194	int i, maxlayers;
195	float *xlocations;
196	float *ylocations;
197
198	maxlayers = (MIN (xsize, ysize) - 2) / 5;
199	if (!maxlayers)
200	return; /* map too small to onionize */
201	if (layers > maxlayers)
202	layers = maxlayers;
203	if (layers == 0)
204	layers = (RANDOM () % maxlayers) + 1;
205	xlocations = (float ) calloc (sizeof (float), 2 layers);
206	ylocations = (float ) calloc (sizeof (float), 2 layers);
207
208
209	/* place all the walls */
210	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
211	{
212	int x_spaces_available, y_spaces_available;
213
214	/* the "extra" spaces available for spacing between layers */
215	x_spaces_available = (xsize - 2) - 6 * layers + 1;
216	y_spaces_available = (ysize - 2) - 3 * layers + 1;
217
218
219	/* pick an initial random pitch */
220	for (i = 0; i < 2 * layers; i++)
221	{
222	float xpitch = 2, ypitch = 2;
223
224	if (x_spaces_available > 0)
225	xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
226
227	if (y_spaces_available > 0)
228	ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
229	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
230	if (i < layers)
231	ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
232	else
233	ylocations[i] = ysize - 1;
234	x_spaces_available -= (int) (xpitch - 2);
235	y_spaces_available -= (int) (ypitch - 2);
236	}
237
238	}
239	if (!(option & RMOPT_IRR_SPACE))
240	{ /* evenly spaced */
241	float xpitch, ypitch; /* pitch of the onion layers */
242
243	xpitch = (xsize - 2.0) / (2.0 * layers + 1);
244	ypitch = (ysize - 2.0) / (layers + 1);
245	xlocations[0] = xpitch;
246	ylocations[0] = ypitch;
247	for (i = 1; i < 2 * layers; i++)
248	{
249	xlocations[i] = xlocations[i - 1] + xpitch;
250	if (i < layers)
251	ylocations[i] = ylocations[i - 1] + ypitch;
252	else
253	ylocations[i] = ysize - 1;
254	}
255	}
256
257	/* draw all the onion boxes. */
258
259	draw_onion (maze, xlocations, ylocations, layers);
260	make_doors (maze, xlocations, ylocations, layers, option);
261
262	}
263
264
265	/* draw_boxes: draws the lines in the maze defining the onion layers */
266
267	void
268	draw_onion (char *maze, float xlocations, float *ylocations, int layers)
269	{
270	int i, j, l;
271
272	for (l = 0; l < layers; l++)
273	{
274	int x1, x2, y1, y2;
275
276	/* horizontal segments */
277	y1 = (int) ylocations[l];
278	y2 = (int) ylocations[2 * layers - l - 1];
279	for (i = (int) xlocations[l]; i <= (int) xlocations[2 * layers - l - 1]; i++)
280	{
281	maze[i][y1] = '#';
282	maze[i][y2] = '#';
283	}
284
285	/* vertical segments */
286	x1 = (int) xlocations[l];
287	x2 = (int) xlocations[2 * layers - l - 1];
288	for (j = (int) ylocations[l]; j <= (int) ylocations[2 * layers - l - 1]; j++)
289	{
290	maze[x1][j] = '#';
291	maze[x2][j] = '#';
292	}
293
294	}
295	}
296
297	void
298	make_doors (char *maze, float xlocations, float *ylocations, int layers, int options)
299	{
300	int freedoms; /* number of different walls on which we could place a door */
301	int which_wall; /* left, 1, top, 2, right, 3, bottom 4 */
302	int l, x1 = 0, x2, y1 = 0, y2;
303
304	freedoms = 4; /* centered */
305	if (options & RMOPT_BOTTOM_C)
306	freedoms = 3;
307	if (options & RMOPT_BOTTOM_R)
308	freedoms = 2;
309	if (layers <= 0)
310	return;
311	/* pick which wall will have a door. */
312	which_wall = RANDOM () % freedoms + 1;
313	for (l = 0; l < layers; l++)
314	{
315	if (options & RMOPT_LINEAR)
316	{ /* linear door placement. */
317	switch (which_wall)
318	{
319	case 1:
320	{ /* left hand wall */
321	x1 = (int) xlocations[l];
322	y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
323	break;
324	}
325	case 2:
326	{ /* top wall placement */
327	x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
328	y1 = (int) ylocations[l];
329	break;
330	}
331	case 3:
332	{ /* right wall placement */
333	x1 = (int) xlocations[2 * layers - l - 1];
334	y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
335	break;
336	}
337	case 4:
338	{ /* bottom wall placement */
339	x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
340	y1 = (int) ylocations[2 * layers - l - 1];
341	break;
342	}
343	}
344	}
345	else
346	{ /* random door placement. */
347	which_wall = RANDOM () % freedoms + 1;
348	switch (which_wall)
349	{
350	case 1:
351	{ /* left hand wall */
352	x1 = (int) xlocations[l];
353	y2 = (int) (ylocations[2 * layers - l - 1] - ylocations[l] - 1);
354	if (y2 > 0)
355	y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
356	else
357	y1 = (int) (ylocations[l] + 1);
358	break;
359	}
360	case 2:
361	{ /* top wall placement */
362	x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
363	if (x2 > 0)
364	x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
365	else
366	x1 = (int) (xlocations[l] + 1);
367	y1 = (int) ylocations[l];
368	break;
369	}
370	case 3:
371	{ /* right wall placement */
372	x1 = (int) xlocations[2 * layers - l - 1];
373	y2 = (int) ((-ylocations[l] + ylocations[2 * layers - l - 1])) - 1;
374	if (y2 > 0)
375	y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
376	else
377	y1 = (int) (ylocations[l] + 1);
378
379	break;
380	}
381	case 4:
382	{ /* bottom wall placement */
383	x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
384	if (x2 > 0)
385	x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
386	else
387	x1 = (int) (xlocations[l] + 1);
388	y1 = (int) ylocations[2 * layers - l - 1];
389	break;
390	}
391
392	}
393	}
394	if (options & RMOPT_NO_DOORS)
395	maze[x1][y1] = '#'; /* no door. */
396	else
397	maze[x1][y1] = 'D'; /* write the door */
398
399	}
400	/* mark the center of the maze with a C */
401	l = layers - 1;
402	x1 = (int) (xlocations[l] + xlocations[2 * layers - l - 1]) / 2;
403	y1 = (int) (ylocations[l] + ylocations[2 * layers - l - 1]) / 2;
404	maze[x1][y1] = 'C';
405
406	/* not needed anymore */
407	free (xlocations);
408	free (ylocations);
409
410	}
411
412	void
413	bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
414	{
415	int i, maxlayers;
416	float *xlocations;
417	float *ylocations;
418
419	maxlayers = (MIN (xsize, ysize) - 2) / 5;
420	if (!maxlayers)
421	return; /* map too small to onionize */
422	if (layers > maxlayers)
423	layers = maxlayers;
424	if (layers == 0)
425	layers = (RANDOM () % maxlayers) + 1;
426	xlocations = (float ) calloc (sizeof (float), 2 layers);
427	ylocations = (float ) calloc (sizeof (float), 2 layers);
428
429
430	/* place all the walls */
431	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
432	{
433	int x_spaces_available, y_spaces_available;
434
435	/* the "extra" spaces available for spacing between layers */
436	x_spaces_available = (xsize - 2) - 3 * layers + 1;
437	y_spaces_available = (ysize - 2) - 3 * layers + 1;
438
439
440	/* pick an initial random pitch */
441	for (i = 0; i < 2 * layers; i++)
442	{
443	float xpitch = 2, ypitch = 2;
444
445	if (x_spaces_available > 0)
446	xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
447
448	if (y_spaces_available > 0)
449	ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
450	if (i < layers)
451	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
452	else
453	xlocations[i] = xsize - 1;
454
455	if (i < layers)
456	ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
457	else
458	ylocations[i] = ysize - 1;
459	x_spaces_available -= (int) (xpitch - 2);
460	y_spaces_available -= (int) (ypitch - 2);
461	}
462
463	}
464	if (!(option & RMOPT_IRR_SPACE))
465	{ /* evenly spaced */
466	float xpitch, ypitch; /* pitch of the onion layers */
467
468	xpitch = (xsize - 2.0) / (2.0 * layers + 1);
469	ypitch = (ysize - 2.0) / (layers + 1);
470	xlocations[0] = xpitch;
471	ylocations[0] = ypitch;
472	for (i = 1; i < 2 * layers; i++)
473	{
474	if (i < layers)
475	xlocations[i] = xlocations[i - 1] + xpitch;
476	else
477	xlocations[i] = xsize - 1;
478	if (i < layers)
479	ylocations[i] = ylocations[i - 1] + ypitch;
480	else
481	ylocations[i] = ysize - 1;
482	}
483	}
484
485	/* draw all the onion boxes. */
486
487	draw_onion (maze, xlocations, ylocations, layers);
488	make_doors (maze, xlocations, ylocations, layers, option);
489
490	}