server/random_maps/room_gen_onion.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>
 */


/*  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 (rndm (3))
        {
          case 0:
            option |= RMOPT_CENTERED;
            break;
          case 1:
            option |= RMOPT_BOTTOM_C;
            break;
          case 2:
            option |= RMOPT_BOTTOM_R;
            break;
        }
      if (rndm (2))
        option |= RMOPT_LINEAR;
      if (rndm (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:	1.9
Committed:	Thu Jan 18 19:42:10 2007 UTC (17 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+3 -3 lines
Log Message:	just experimenting
#	User	Rev	Content
1	elmex	1.1	/*
2	pippijn	1.8	* 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	elmex	1.1
25
26			/* The onion room generator:
27			Onion rooms are like this:
28
29			char **map_gen_onion(int xsize, int ysize, int option, int layers);
30
31			like this:
32			regular random
33			centered, linear onion bottom/right centered, nonlinear
34
35			######################### #########################
36			# # # #
37			# ######## ########## # # #####################
38			# # # # # # #
39			# # ###### ######## # # # # #
40			# # # # # # # # ######## ########
41			# # # #### ###### # # # # # # #
42			# # # # # # # # # # # #
43			# # # ############ # # # # # # ########### ##
44			# # # # # # # # # # #
45			# # ################ # # # # # # #########
46			# # # # # # # # #
47			# #################### # # # # # #
48			# # # # # # # #
49			######################### #########################
50
51			*/
52
53
54			#include <global.h>
55			#include <random_map.h>
56
57			#ifndef MIN
58	root	1.3	# define MIN(x,y) (((x)<(y))? (x):(y))
59	elmex	1.1	#endif
60	root	1.3	void centered_onion (char **maze, int xsize, int ysize, int option, int layers);
61			void bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
62			void bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
63	elmex	1.1
64
65	root	1.3	void draw_onion (char *maze, float xlocations, float *ylocations, int layers);
66			void make_doors (char *maze, float xlocations, float *ylocations, int layers, int options);
67
68			char **
69			map_gen_onion (int xsize, int ysize, int option, int layers)
70			{
71			int i, j;
72	elmex	1.1
73	root	1.3	/* allocate that array, set it up */
74			char maze = (char ) calloc (sizeof (char *), xsize);
75	elmex	1.1
76	root	1.3	for (i = 0; i < xsize; i++)
77			{
78			maze[i] = (char *) calloc (sizeof (char), ysize);
79			}
80	elmex	1.1
81			/* pick some random options if option = 0 */
82	root	1.3	if (option == 0)
83			{
84	root	1.9	switch (rndm (3))
85	root	1.3	{
86	root	1.6	case 0:
87			option \|= RMOPT_CENTERED;
88			break;
89			case 1:
90			option \|= RMOPT_BOTTOM_C;
91			break;
92			case 2:
93			option \|= RMOPT_BOTTOM_R;
94			break;
95	root	1.3	}
96	root	1.9	if (rndm (2))
97	root	1.5	option \|= RMOPT_LINEAR;
98	root	1.9	if (rndm (2))
99	root	1.5	option \|= RMOPT_IRR_SPACE;
100	root	1.3	}
101
102	elmex	1.1	/* write the outer walls, if appropriate. */
103	root	1.5	if (!(option & RMOPT_WALL_OFF))
104	root	1.3	{
105			for (i = 0; i < xsize; i++)
106			maze[i][0] = maze[i][ysize - 1] = '#';
107			for (j = 0; j < ysize; j++)
108			maze[0][j] = maze[xsize - 1][j] = '#';
109			};
110	elmex	1.1
111	root	1.5	if (option & RMOPT_WALLS_ONLY)
112	root	1.3	return maze;
113	elmex	1.1
114			/* pick off the mutually exclusive options */
115	root	1.5	if (option & RMOPT_BOTTOM_R)
116	root	1.3	bottom_right_centered_onion (maze, xsize, ysize, option, layers);
117	root	1.5	else if (option & RMOPT_BOTTOM_C)
118	root	1.3	bottom_centered_onion (maze, xsize, ysize, option, layers);
119	root	1.5	else if (option & RMOPT_CENTERED)
120	root	1.3	centered_onion (maze, xsize, ysize, option, layers);
121
122	elmex	1.1	return maze;
123			}
124
125	root	1.3	void
126			centered_onion (char **maze, int xsize, int ysize, int option, int layers)
127			{
128			int i, maxlayers;
129	elmex	1.1	float *xlocations;
130			float *ylocations;
131
132	root	1.3	maxlayers = (MIN (xsize, ysize) - 2) / 5;
133			if (!maxlayers)
134			return; /* map too small to onionize */
135			if (layers > maxlayers)
136			layers = maxlayers;
137			if (layers == 0)
138			layers = (RANDOM () % maxlayers) + 1;
139			xlocations = (float ) calloc (sizeof (float), 2 layers);
140			ylocations = (float ) calloc (sizeof (float), 2 layers);
141
142
143	elmex	1.1	/* place all the walls */
144	root	1.6	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
145	root	1.3	{
146			int x_spaces_available, y_spaces_available;
147
148			/* the "extra" spaces available for spacing between layers */
149			x_spaces_available = (xsize - 2) - 6 * layers + 1;
150			y_spaces_available = (ysize - 2) - 6 * layers + 1;
151
152
153			/* pick an initial random pitch */
154			for (i = 0; i < 2 * layers; i++)
155			{
156			float xpitch = 2, ypitch = 2;
157
158			if (x_spaces_available > 0)
159			xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
160
161			if (y_spaces_available > 0)
162			ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
163			xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
164			ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
165			x_spaces_available -= (int) (xpitch - 2);
166			y_spaces_available -= (int) (ypitch - 2);
167			}
168
169			}
170	root	1.5	if (!(option & RMOPT_IRR_SPACE))
171	root	1.3	{ /* evenly spaced */
172			float xpitch, ypitch; /* pitch of the onion layers */
173
174			xpitch = (xsize - 2.0) / (2.0 * layers + 1);
175			ypitch = (ysize - 2.0) / (2.0 * layers + 1);
176			xlocations[0] = xpitch;
177			ylocations[0] = ypitch;
178			for (i = 1; i < 2 * layers; i++)
179			{
180			xlocations[i] = xlocations[i - 1] + xpitch;
181			ylocations[i] = ylocations[i - 1] + ypitch;
182			}
183	elmex	1.1	}
184	root	1.3
185	elmex	1.1	/* draw all the onion boxes. */
186
187	root	1.3	draw_onion (maze, xlocations, ylocations, layers);
188			make_doors (maze, xlocations, ylocations, layers, option);
189
190	elmex	1.1	}
191
192	root	1.3	void
193			bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
194			{
195			int i, maxlayers;
196	elmex	1.1	float *xlocations;
197			float *ylocations;
198
199	root	1.3	maxlayers = (MIN (xsize, ysize) - 2) / 5;
200			if (!maxlayers)
201			return; /* map too small to onionize */
202			if (layers > maxlayers)
203			layers = maxlayers;
204			if (layers == 0)
205			layers = (RANDOM () % maxlayers) + 1;
206			xlocations = (float ) calloc (sizeof (float), 2 layers);
207			ylocations = (float ) calloc (sizeof (float), 2 layers);
208
209
210	elmex	1.1	/* place all the walls */
211	root	1.6	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
212	root	1.3	{
213			int x_spaces_available, y_spaces_available;
214
215			/* the "extra" spaces available for spacing between layers */
216			x_spaces_available = (xsize - 2) - 6 * layers + 1;
217			y_spaces_available = (ysize - 2) - 3 * layers + 1;
218
219
220			/* pick an initial random pitch */
221			for (i = 0; i < 2 * layers; i++)
222			{
223			float xpitch = 2, ypitch = 2;
224
225			if (x_spaces_available > 0)
226			xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
227
228			if (y_spaces_available > 0)
229			ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
230			xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
231			if (i < layers)
232			ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
233			else
234			ylocations[i] = ysize - 1;
235			x_spaces_available -= (int) (xpitch - 2);
236			y_spaces_available -= (int) (ypitch - 2);
237			}
238
239	elmex	1.1	}
240	root	1.5	if (!(option & RMOPT_IRR_SPACE))
241	root	1.3	{ /* evenly spaced */
242			float xpitch, ypitch; /* pitch of the onion layers */
243
244			xpitch = (xsize - 2.0) / (2.0 * layers + 1);
245			ypitch = (ysize - 2.0) / (layers + 1);
246			xlocations[0] = xpitch;
247			ylocations[0] = ypitch;
248			for (i = 1; i < 2 * layers; i++)
249			{
250			xlocations[i] = xlocations[i - 1] + xpitch;
251			if (i < layers)
252			ylocations[i] = ylocations[i - 1] + ypitch;
253			else
254			ylocations[i] = ysize - 1;
255			}
256			}
257
258	elmex	1.1	/* draw all the onion boxes. */
259
260	root	1.3	draw_onion (maze, xlocations, ylocations, layers);
261			make_doors (maze, xlocations, ylocations, layers, option);
262
263	elmex	1.1	}
264
265
266			/* draw_boxes: draws the lines in the maze defining the onion layers */
267
268	root	1.3	void
269			draw_onion (char *maze, float xlocations, float *ylocations, int layers)
270			{
271			int i, j, l;
272
273			for (l = 0; l < layers; l++)
274			{
275			int x1, x2, y1, y2;
276
277			/* horizontal segments */
278			y1 = (int) ylocations[l];
279			y2 = (int) ylocations[2 * layers - l - 1];
280			for (i = (int) xlocations[l]; i <= (int) xlocations[2 * layers - l - 1]; i++)
281			{
282			maze[i][y1] = '#';
283			maze[i][y2] = '#';
284			}
285
286			/* vertical segments */
287			x1 = (int) xlocations[l];
288			x2 = (int) xlocations[2 * layers - l - 1];
289			for (j = (int) ylocations[l]; j <= (int) ylocations[2 * layers - l - 1]; j++)
290			{
291			maze[x1][j] = '#';
292			maze[x2][j] = '#';
293			}
294	elmex	1.1
295	root	1.3	}
296	elmex	1.1	}
297
298	root	1.3	void
299			make_doors (char *maze, float xlocations, float *ylocations, int layers, int options)
300			{
301			int freedoms; /* number of different walls on which we could place a door */
302			int which_wall; /* left, 1, top, 2, right, 3, bottom 4 */
303			int l, x1 = 0, x2, y1 = 0, y2;
304
305			freedoms = 4; /* centered */
306	root	1.5	if (options & RMOPT_BOTTOM_C)
307	root	1.3	freedoms = 3;
308	root	1.5	if (options & RMOPT_BOTTOM_R)
309	root	1.3	freedoms = 2;
310			if (layers <= 0)
311			return;
312	elmex	1.1	/* pick which wall will have a door. */
313	root	1.3	which_wall = RANDOM () % freedoms + 1;
314			for (l = 0; l < layers; l++)
315			{
316	root	1.5	if (options & RMOPT_LINEAR)
317	root	1.3	{ /* linear door placement. */
318			switch (which_wall)
319			{
320	root	1.6	case 1:
321			{ /* left hand wall */
322			x1 = (int) xlocations[l];
323			y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
324			break;
325			}
326			case 2:
327			{ /* top wall placement */
328			x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
329			y1 = (int) ylocations[l];
330			break;
331			}
332			case 3:
333			{ /* right wall placement */
334			x1 = (int) xlocations[2 * layers - l - 1];
335			y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
336			break;
337			}
338			case 4:
339			{ /* bottom wall placement */
340			x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
341			y1 = (int) ylocations[2 * layers - l - 1];
342			break;
343			}
344	root	1.3	}
345			}
346			else
347			{ /* random door placement. */
348			which_wall = RANDOM () % freedoms + 1;
349			switch (which_wall)
350			{
351	root	1.6	case 1:
352			{ /* left hand wall */
353			x1 = (int) xlocations[l];
354			y2 = (int) (ylocations[2 * layers - l - 1] - ylocations[l] - 1);
355			if (y2 > 0)
356			y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
357			else
358			y1 = (int) (ylocations[l] + 1);
359			break;
360			}
361			case 2:
362			{ /* top wall placement */
363			x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
364			if (x2 > 0)
365			x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
366			else
367			x1 = (int) (xlocations[l] + 1);
368			y1 = (int) ylocations[l];
369			break;
370			}
371			case 3:
372			{ /* right wall placement */
373			x1 = (int) xlocations[2 * layers - l - 1];
374			y2 = (int) ((-ylocations[l] + ylocations[2 * layers - l - 1])) - 1;
375			if (y2 > 0)
376			y1 = (int) (ylocations[l] + RANDOM () % y2 + 1);
377			else
378			y1 = (int) (ylocations[l] + 1);
379
380			break;
381			}
382			case 4:
383			{ /* bottom wall placement */
384			x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
385			if (x2 > 0)
386			x1 = (int) (xlocations[l] + RANDOM () % x2 + 1);
387			else
388			x1 = (int) (xlocations[l] + 1);
389			y1 = (int) ylocations[2 * layers - l - 1];
390			break;
391			}
392	root	1.3
393			}
394			}
395	root	1.5	if (options & RMOPT_NO_DOORS)
396	root	1.3	maze[x1][y1] = '#'; /* no door. */
397			else
398			maze[x1][y1] = 'D'; /* write the door */
399	elmex	1.1
400	root	1.3	}
401	elmex	1.1	/* mark the center of the maze with a C */
402	root	1.3	l = layers - 1;
403			x1 = (int) (xlocations[l] + xlocations[2 * layers - l - 1]) / 2;
404			y1 = (int) (ylocations[l] + ylocations[2 * layers - l - 1]) / 2;
405	elmex	1.1	maze[x1][y1] = 'C';
406
407			/* not needed anymore */
408	root	1.3	free (xlocations);
409			free (ylocations);
410
411	elmex	1.1	}
412
413	root	1.3	void
414			bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
415			{
416			int i, maxlayers;
417	elmex	1.1	float *xlocations;
418			float *ylocations;
419
420	root	1.3	maxlayers = (MIN (xsize, ysize) - 2) / 5;
421			if (!maxlayers)
422			return; /* map too small to onionize */
423			if (layers > maxlayers)
424			layers = maxlayers;
425			if (layers == 0)
426			layers = (RANDOM () % maxlayers) + 1;
427			xlocations = (float ) calloc (sizeof (float), 2 layers);
428			ylocations = (float ) calloc (sizeof (float), 2 layers);
429
430
431	elmex	1.1	/* place all the walls */
432	root	1.6	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
433	root	1.3	{
434			int x_spaces_available, y_spaces_available;
435
436			/* the "extra" spaces available for spacing between layers */
437			x_spaces_available = (xsize - 2) - 3 * layers + 1;
438			y_spaces_available = (ysize - 2) - 3 * layers + 1;
439
440
441			/* pick an initial random pitch */
442			for (i = 0; i < 2 * layers; i++)
443			{
444			float xpitch = 2, ypitch = 2;
445
446			if (x_spaces_available > 0)
447			xpitch = 2 + (RANDOM () % x_spaces_available + RANDOM () % x_spaces_available + RANDOM () % x_spaces_available) / 3;
448
449			if (y_spaces_available > 0)
450			ypitch = 2 + (RANDOM () % y_spaces_available + RANDOM () % y_spaces_available + RANDOM () % y_spaces_available) / 3;
451			if (i < layers)
452			xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
453			else
454			xlocations[i] = xsize - 1;
455
456			if (i < layers)
457			ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
458			else
459			ylocations[i] = ysize - 1;
460			x_spaces_available -= (int) (xpitch - 2);
461			y_spaces_available -= (int) (ypitch - 2);
462			}
463
464	elmex	1.1	}
465	root	1.5	if (!(option & RMOPT_IRR_SPACE))
466	root	1.3	{ /* evenly spaced */
467			float xpitch, ypitch; /* pitch of the onion layers */
468
469			xpitch = (xsize - 2.0) / (2.0 * layers + 1);
470			ypitch = (ysize - 2.0) / (layers + 1);
471			xlocations[0] = xpitch;
472			ylocations[0] = ypitch;
473			for (i = 1; i < 2 * layers; i++)
474			{
475			if (i < layers)
476			xlocations[i] = xlocations[i - 1] + xpitch;
477			else
478			xlocations[i] = xsize - 1;
479			if (i < layers)
480			ylocations[i] = ylocations[i - 1] + ypitch;
481			else
482			ylocations[i] = ysize - 1;
483			}
484			}
485
486	elmex	1.1	/* draw all the onion boxes. */
487
488	root	1.3	draw_onion (maze, xlocations, ylocations, layers);
489			make_doors (maze, xlocations, ylocations, layers, option);
490
491	elmex	1.1	}