server/random_maps/room_gen_onion.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 *
 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2001 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992 Frank Tore Johansen
 *
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 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 Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

/*  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 <rmg.h>
#include <rproto.h>

static void centered_onion (char **maze, int xsize, int ysize, int option, int layers);
static void bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
static void bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers);

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

void
map_gen_onion (layout &maze, int option, int layers)
{
  int xsize = maze.w;
  int ysize = maze.h;

  maze.clear ();

  /* pick some random options if option = 0 */
  if (option == 0)
    {
      switch (rmg_rndm (3))
        {
          case 0:
            option |= RMOPT_CENTERED;
            break;
          case 1:
            option |= RMOPT_BOTTOM_C;
            break;
          case 2:
            option |= RMOPT_BOTTOM_R;
            break;
        }

      if (rmg_rndm (2)) option |= RMOPT_LINEAR;
      if (rmg_rndm (2)) option |= RMOPT_IRR_SPACE;
    }

  /* write the outer walls, if appropriate. */
  if (!(option & RMOPT_WALL_OFF))
    maze.border ();

  if (option & RMOPT_WALLS_ONLY)
    return;

  /* 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);
}

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

  maxlayers = (min (xsize, ysize) - 2) / 5;

  if (!maxlayers)
    return;                     /* map too small to onionize */

  if (layers > maxlayers)
    layers = maxlayers;

  if (layers == 0)
    layers = rmg_rndm (maxlayers) + 1;

  float *xlocations = salloc0<float> (2 * layers);
  float *ylocations = salloc0<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 + (rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available)) / 3;

          if (y_spaces_available > 0)
            ypitch = 2 + (rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available) + rmg_rndm (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);

  sfree (xlocations, 2 * layers);
  sfree (ylocations, 2 * layers);
}

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

  maxlayers = (min (xsize, ysize) - 2) / 5;

  if (!maxlayers)
    return;                     /* map too small to onionize */

  if (layers > maxlayers)
    layers = maxlayers;

  if (layers == 0)
    layers = rmg_rndm (maxlayers) + 1;

  float *xlocations = salloc0<float> (2 * layers);
  float *ylocations = salloc0<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 + (rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available)) / 3;

          if (y_spaces_available > 0)
            ypitch = 2 + (rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available) + rmg_rndm (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);

  sfree (xlocations, 2 * layers);
  sfree (ylocations, 2 * layers);
}

/*  draw_boxes: draws the lines in the maze defining the onion layers */
static 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] = '#';
        }

    }
}

static 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 = rmg_rndm (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 = rmg_rndm (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] + rmg_rndm (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] + rmg_rndm (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] + rmg_rndm (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] + rmg_rndm (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';
}

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

  maxlayers = (min (xsize, ysize) - 2) / 5;

  if (!maxlayers)
    return;                     /* map too small to onionize */

  if (layers > maxlayers)
    layers = maxlayers;

  if (layers == 0)
    layers = rmg_rndm (maxlayers) + 1;

  float *xlocations = salloc0<float> (2 * layers);
  float *ylocations = salloc0<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 + (rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available)) / 3;

          if (y_spaces_available > 0)
            ypitch = 2 + (rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available) + rmg_rndm (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);

  sfree (xlocations, 2 * layers);
  sfree (ylocations, 2 * layers);
}

Revision:	1.30
Committed:	Wed Nov 16 23:42:02 2016 UTC (7 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.29:	+1 -1 lines
Log Message:	copyright update 2016
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.12	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	root	1.29	*
4	root	1.30	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.21	* Copyright (©) 2001 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992 Frank Tore Johansen
7	root	1.29	*
8	root	1.17	* Deliantra is free software: you can redistribute it and/or modify it under
9			* the terms of the Affero GNU General Public License as published by the
10			* Free Software Foundation, either version 3 of the License, or (at your
11			* option) any later version.
12	root	1.29	*
13	pippijn	1.8	* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	root	1.11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	pippijn	1.8	* GNU General Public License for more details.
17	root	1.29	*
18	root	1.17	* You should have received a copy of the Affero GNU General Public License
19			* and the GNU General Public License along with this program. If not, see
20			* <http://www.gnu.org/licenses/>.
21	root	1.29	*
22	root	1.12	* The authors can be reached via e-mail to <support@deliantra.net>
23	pippijn	1.8	*/
24	elmex	1.1
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	root	1.25	#include <rmg.h>
55	root	1.20	#include <rproto.h>
56	elmex	1.1
57	root	1.18	static void centered_onion (char **maze, int xsize, int ysize, int option, int layers);
58			static void bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
59			static void bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers);
60
61			static void draw_onion (char *maze, float xlocations, float *ylocations, int layers);
62			static void make_doors (char *maze, float xlocations, float *ylocations, int layers, int options);
63	root	1.3
64	root	1.14	void
65	root	1.24	map_gen_onion (layout &maze, int option, int layers)
66	root	1.3	{
67	root	1.23	int xsize = maze.w;
68			int ysize = maze.h;
69	root	1.14
70	root	1.23	maze.clear ();
71	elmex	1.1
72			/* pick some random options if option = 0 */
73	root	1.3	if (option == 0)
74			{
75	root	1.16	switch (rmg_rndm (3))
76	root	1.3	{
77	root	1.6	case 0:
78			option \|= RMOPT_CENTERED;
79			break;
80			case 1:
81			option \|= RMOPT_BOTTOM_C;
82			break;
83			case 2:
84			option \|= RMOPT_BOTTOM_R;
85			break;
86	root	1.3	}
87	root	1.13
88	root	1.16	if (rmg_rndm (2)) option \|= RMOPT_LINEAR;
89			if (rmg_rndm (2)) option \|= RMOPT_IRR_SPACE;
90	root	1.3	}
91
92	elmex	1.1	/* write the outer walls, if appropriate. */
93	root	1.5	if (!(option & RMOPT_WALL_OFF))
94	root	1.23	maze.border ();
95	elmex	1.1
96	root	1.5	if (option & RMOPT_WALLS_ONLY)
97	root	1.14	return;
98	elmex	1.1
99			/* pick off the mutually exclusive options */
100	root	1.5	if (option & RMOPT_BOTTOM_R)
101	root	1.3	bottom_right_centered_onion (maze, xsize, ysize, option, layers);
102	root	1.5	else if (option & RMOPT_BOTTOM_C)
103	root	1.3	bottom_centered_onion (maze, xsize, ysize, option, layers);
104	root	1.5	else if (option & RMOPT_CENTERED)
105	root	1.3	centered_onion (maze, xsize, ysize, option, layers);
106	elmex	1.1	}
107
108	root	1.18	static void
109	root	1.3	centered_onion (char **maze, int xsize, int ysize, int option, int layers)
110			{
111			int i, maxlayers;
112	elmex	1.1
113	root	1.20	maxlayers = (min (xsize, ysize) - 2) / 5;
114	root	1.13
115	root	1.3	if (!maxlayers)
116			return; /* map too small to onionize */
117	root	1.10
118	root	1.3	if (layers > maxlayers)
119			layers = maxlayers;
120	root	1.10
121	root	1.3	if (layers == 0)
122	root	1.16	layers = rmg_rndm (maxlayers) + 1;
123	root	1.10
124	root	1.13	float xlocations = salloc0<float> (2 layers);
125			float ylocations = salloc0<float> (2 layers);
126	root	1.3
127	elmex	1.1	/* place all the walls */
128	root	1.6	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
129	root	1.3	{
130			int x_spaces_available, y_spaces_available;
131
132			/* the "extra" spaces available for spacing between layers */
133			x_spaces_available = (xsize - 2) - 6 * layers + 1;
134			y_spaces_available = (ysize - 2) - 6 * layers + 1;
135
136			/* pick an initial random pitch */
137			for (i = 0; i < 2 * layers; i++)
138			{
139			float xpitch = 2, ypitch = 2;
140
141			if (x_spaces_available > 0)
142	root	1.16	xpitch = 2 + (rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available)) / 3;
143	root	1.3
144			if (y_spaces_available > 0)
145	root	1.16	ypitch = 2 + (rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available)) / 3;
146	root	1.10
147	root	1.3	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
148			ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
149			x_spaces_available -= (int) (xpitch - 2);
150			y_spaces_available -= (int) (ypitch - 2);
151			}
152
153			}
154	root	1.13
155	root	1.5	if (!(option & RMOPT_IRR_SPACE))
156	root	1.3	{ /* evenly spaced */
157			float xpitch, ypitch; /* pitch of the onion layers */
158
159			xpitch = (xsize - 2.0) / (2.0 * layers + 1);
160			ypitch = (ysize - 2.0) / (2.0 * layers + 1);
161	root	1.13
162	root	1.3	xlocations[0] = xpitch;
163			ylocations[0] = ypitch;
164	root	1.13
165	root	1.3	for (i = 1; i < 2 * layers; i++)
166			{
167			xlocations[i] = xlocations[i - 1] + xpitch;
168			ylocations[i] = ylocations[i - 1] + ypitch;
169			}
170	elmex	1.1	}
171	root	1.3
172	elmex	1.1	/* draw all the onion boxes. */
173	root	1.3	draw_onion (maze, xlocations, ylocations, layers);
174			make_doors (maze, xlocations, ylocations, layers, option);
175
176	root	1.13	sfree (xlocations, 2 * layers);
177			sfree (ylocations, 2 * layers);
178	elmex	1.1	}
179
180	root	1.18	static void
181	root	1.3	bottom_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
182			{
183			int i, maxlayers;
184	elmex	1.1
185	root	1.20	maxlayers = (min (xsize, ysize) - 2) / 5;
186	root	1.13
187	root	1.3	if (!maxlayers)
188			return; /* map too small to onionize */
189	root	1.13
190	root	1.3	if (layers > maxlayers)
191			layers = maxlayers;
192	root	1.13
193	root	1.3	if (layers == 0)
194	root	1.16	layers = rmg_rndm (maxlayers) + 1;
195	root	1.3
196	root	1.13	float xlocations = salloc0<float> (2 layers);
197			float ylocations = salloc0<float> (2 layers);
198	root	1.3
199	elmex	1.1	/* place all the walls */
200	root	1.6	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
201	root	1.3	{
202			int x_spaces_available, y_spaces_available;
203
204			/* the "extra" spaces available for spacing between layers */
205			x_spaces_available = (xsize - 2) - 6 * layers + 1;
206			y_spaces_available = (ysize - 2) - 3 * layers + 1;
207
208			/* pick an initial random pitch */
209			for (i = 0; i < 2 * layers; i++)
210			{
211			float xpitch = 2, ypitch = 2;
212
213			if (x_spaces_available > 0)
214	root	1.16	xpitch = 2 + (rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available)) / 3;
215	root	1.3
216			if (y_spaces_available > 0)
217	root	1.16	ypitch = 2 + (rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available)) / 3;
218	root	1.10
219	root	1.3	xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
220	root	1.13
221	root	1.3	if (i < layers)
222			ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
223			else
224			ylocations[i] = ysize - 1;
225	root	1.10
226	root	1.3	x_spaces_available -= (int) (xpitch - 2);
227			y_spaces_available -= (int) (ypitch - 2);
228			}
229	root	1.13	}
230	root	1.3
231	root	1.5	if (!(option & RMOPT_IRR_SPACE))
232	root	1.3	{ /* evenly spaced */
233			float xpitch, ypitch; /* pitch of the onion layers */
234
235			xpitch = (xsize - 2.0) / (2.0 * layers + 1);
236			ypitch = (ysize - 2.0) / (layers + 1);
237	root	1.13
238	root	1.3	xlocations[0] = xpitch;
239			ylocations[0] = ypitch;
240	root	1.13
241	root	1.3	for (i = 1; i < 2 * layers; i++)
242			{
243			xlocations[i] = xlocations[i - 1] + xpitch;
244	root	1.13
245	root	1.3	if (i < layers)
246			ylocations[i] = ylocations[i - 1] + ypitch;
247			else
248			ylocations[i] = ysize - 1;
249			}
250			}
251
252	elmex	1.1	/* draw all the onion boxes. */
253
254	root	1.3	draw_onion (maze, xlocations, ylocations, layers);
255			make_doors (maze, xlocations, ylocations, layers, option);
256
257	root	1.13	sfree (xlocations, 2 * layers);
258			sfree (ylocations, 2 * layers);
259	elmex	1.1	}
260
261	root	1.18	/* draw_boxes: draws the lines in the maze defining the onion layers */
262			static void
263	root	1.3	draw_onion (char *maze, float xlocations, float *ylocations, int layers)
264			{
265			int i, j, l;
266
267			for (l = 0; l < layers; l++)
268			{
269			int x1, x2, y1, y2;
270
271			/* horizontal segments */
272			y1 = (int) ylocations[l];
273			y2 = (int) ylocations[2 * layers - l - 1];
274			for (i = (int) xlocations[l]; i <= (int) xlocations[2 * layers - l - 1]; i++)
275			{
276			maze[i][y1] = '#';
277			maze[i][y2] = '#';
278			}
279
280			/* vertical segments */
281			x1 = (int) xlocations[l];
282			x2 = (int) xlocations[2 * layers - l - 1];
283			for (j = (int) ylocations[l]; j <= (int) ylocations[2 * layers - l - 1]; j++)
284			{
285			maze[x1][j] = '#';
286			maze[x2][j] = '#';
287			}
288	elmex	1.1
289	root	1.3	}
290	elmex	1.1	}
291
292	root	1.19	static void
293	root	1.3	make_doors (char *maze, float xlocations, float *ylocations, int layers, int options)
294			{
295			int freedoms; /* number of different walls on which we could place a door */
296			int which_wall; /* left, 1, top, 2, right, 3, bottom 4 */
297			int l, x1 = 0, x2, y1 = 0, y2;
298
299			freedoms = 4; /* centered */
300	root	1.13
301	root	1.5	if (options & RMOPT_BOTTOM_C)
302	root	1.3	freedoms = 3;
303	root	1.13
304	root	1.5	if (options & RMOPT_BOTTOM_R)
305	root	1.3	freedoms = 2;
306	root	1.13
307	root	1.3	if (layers <= 0)
308			return;
309	root	1.10
310	elmex	1.1	/* pick which wall will have a door. */
311	root	1.16	which_wall = rmg_rndm (freedoms) + 1;
312	root	1.3	for (l = 0; l < layers; l++)
313			{
314	root	1.5	if (options & RMOPT_LINEAR)
315	root	1.3	{ /* linear door placement. */
316			switch (which_wall)
317			{
318	root	1.6	case 1:
319			{ /* left hand wall */
320			x1 = (int) xlocations[l];
321			y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
322			break;
323			}
324			case 2:
325			{ /* top wall placement */
326			x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
327			y1 = (int) ylocations[l];
328			break;
329			}
330			case 3:
331			{ /* right wall placement */
332			x1 = (int) xlocations[2 * layers - l - 1];
333			y1 = (int) ((ylocations[l] + ylocations[2 * layers - l - 1]) / 2);
334			break;
335			}
336			case 4:
337			{ /* bottom wall placement */
338			x1 = (int) ((xlocations[l] + xlocations[2 * layers - l - 1]) / 2);
339			y1 = (int) ylocations[2 * layers - l - 1];
340			break;
341			}
342	root	1.3	}
343			}
344			else
345			{ /* random door placement. */
346	root	1.16	which_wall = rmg_rndm (freedoms) + 1;
347	root	1.3	switch (which_wall)
348			{
349	root	1.6	case 1:
350			{ /* left hand wall */
351			x1 = (int) xlocations[l];
352			y2 = (int) (ylocations[2 * layers - l - 1] - ylocations[l] - 1);
353			if (y2 > 0)
354	root	1.16	y1 = (int) (ylocations[l] + rmg_rndm (y2) + 1);
355	root	1.6	else
356			y1 = (int) (ylocations[l] + 1);
357			break;
358			}
359			case 2:
360			{ /* top wall placement */
361			x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
362			if (x2 > 0)
363	root	1.16	x1 = (int) (xlocations[l] + rmg_rndm (x2) + 1);
364	root	1.6	else
365			x1 = (int) (xlocations[l] + 1);
366			y1 = (int) ylocations[l];
367			break;
368			}
369			case 3:
370			{ /* right wall placement */
371			x1 = (int) xlocations[2 * layers - l - 1];
372			y2 = (int) ((-ylocations[l] + ylocations[2 * layers - l - 1])) - 1;
373			if (y2 > 0)
374	root	1.16	y1 = (int) (ylocations[l] + rmg_rndm (y2) + 1);
375	root	1.6	else
376			y1 = (int) (ylocations[l] + 1);
377
378			break;
379			}
380			case 4:
381			{ /* bottom wall placement */
382			x2 = (int) ((-xlocations[l] + xlocations[2 * layers - l - 1])) - 1;
383			if (x2 > 0)
384	root	1.16	x1 = (int) (xlocations[l] + rmg_rndm (x2) + 1);
385	root	1.6	else
386			x1 = (int) (xlocations[l] + 1);
387			y1 = (int) ylocations[2 * layers - l - 1];
388			break;
389			}
390	root	1.3
391			}
392			}
393	root	1.13
394	root	1.5	if (options & RMOPT_NO_DOORS)
395	root	1.3	maze[x1][y1] = '#'; /* no door. */
396			else
397			maze[x1][y1] = 'D'; /* write the door */
398	elmex	1.1
399	root	1.3	}
400	elmex	1.1	/* mark the center of the maze with a C */
401	root	1.3	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	root	1.13
405	elmex	1.1	maze[x1][y1] = 'C';
406			}
407
408	root	1.18	static void
409	root	1.3	bottom_right_centered_onion (char **maze, int xsize, int ysize, int option, int layers)
410			{
411			int i, maxlayers;
412	elmex	1.1
413	root	1.20	maxlayers = (min (xsize, ysize) - 2) / 5;
414	root	1.13
415	root	1.3	if (!maxlayers)
416			return; /* map too small to onionize */
417	root	1.13
418	root	1.3	if (layers > maxlayers)
419			layers = maxlayers;
420	root	1.13
421	root	1.3	if (layers == 0)
422	root	1.16	layers = rmg_rndm (maxlayers) + 1;
423	root	1.10
424	root	1.13	float xlocations = salloc0<float> (2 layers);
425			float ylocations = salloc0<float> (2 layers);
426	root	1.3
427	elmex	1.1	/* place all the walls */
428	root	1.6	if (option & RMOPT_IRR_SPACE) /* randomly spaced */
429	root	1.3	{
430			int x_spaces_available, y_spaces_available;
431
432			/* the "extra" spaces available for spacing between layers */
433			x_spaces_available = (xsize - 2) - 3 * layers + 1;
434			y_spaces_available = (ysize - 2) - 3 * layers + 1;
435
436
437			/* pick an initial random pitch */
438			for (i = 0; i < 2 * layers; i++)
439			{
440			float xpitch = 2, ypitch = 2;
441
442			if (x_spaces_available > 0)
443	root	1.16	xpitch = 2 + (rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available) + rmg_rndm (x_spaces_available)) / 3;
444	root	1.3
445			if (y_spaces_available > 0)
446	root	1.16	ypitch = 2 + (rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available) + rmg_rndm (y_spaces_available)) / 3;
447	root	1.10
448	root	1.3	if (i < layers)
449			xlocations[i] = ((i > 0) ? xlocations[i - 1] : 0) + xpitch;
450			else
451			xlocations[i] = xsize - 1;
452
453			if (i < layers)
454			ylocations[i] = ((i > 0) ? ylocations[i - 1] : 0) + ypitch;
455			else
456			ylocations[i] = ysize - 1;
457	root	1.13
458	root	1.3	x_spaces_available -= (int) (xpitch - 2);
459			y_spaces_available -= (int) (ypitch - 2);
460			}
461	root	1.13	}
462	root	1.3
463	root	1.5	if (!(option & RMOPT_IRR_SPACE))
464	root	1.3	{ /* evenly spaced */
465			float xpitch, ypitch; /* pitch of the onion layers */
466
467			xpitch = (xsize - 2.0) / (2.0 * layers + 1);
468			ypitch = (ysize - 2.0) / (layers + 1);
469	root	1.13
470	root	1.3	xlocations[0] = xpitch;
471			ylocations[0] = ypitch;
472	root	1.13
473	root	1.3	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	root	1.13
480	root	1.3	if (i < layers)
481			ylocations[i] = ylocations[i - 1] + ypitch;
482			else
483			ylocations[i] = ysize - 1;
484			}
485			}
486
487	elmex	1.1	/* draw all the onion boxes. */
488
489	root	1.3	draw_onion (maze, xlocations, ylocations, layers);
490			make_doors (maze, xlocations, ylocations, layers, option);
491
492	root	1.13	sfree (xlocations, 2 * layers);
493			sfree (ylocations, 2 * layers);
494	elmex	1.1	}
495	root	1.13