server/random_maps/room_gen_spiral.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 1994,2007 Mark Wedel
 * Copyright (©) 1992,2007 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_spiral(int xsize, int ysize, int option);
*/

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

#define RANDOM_OPTIONS 0        /* Pick random options below */
#define REGULAR_SPIRAL 1        /* Regular spiral--distance increases constantly */
#define FINE_SPIRAL 2           /* uses the min. separation:  most coiling */
#define FIT_SPIRAL 4            /* scale to a rectangular region, not square */
#define MAX_SPIRAL_OPT 8        /* this should be 2x the last real option */
#include <math.h>

#ifndef MIN
# define MIN(x,y) (((x)<(y))? (x):(y))
#endif
#ifndef MAX
# define MAX(x,y) (((x)<(y))? (y):(x))
#endif

#define MINDIST 3

#define MAX_FINE .454545

extern int surround_check (char **maze, int i, int j, int xsize, int ysize);

void
map_gen_spiral (Layout maze, int option)
{
  int i, j;
  float parm = 0;
  float x = 0, y = 0;
  int ic, jc;
  float SizeX, SizeY;
  float xscale, yscale;

  /* slightly easier to fill and then cut */
  maze->clear ('#');

  int xsize = maze->w;
  int ysize = maze->h;

  ic = xsize / 2;
  jc = ysize / 2;
  SizeX = xsize / 2 - 2;
  SizeY = ysize / 2 - 2;

  /* select random options if necessary */
  if (option == 0)
    option = rmg_rndm (MAX_SPIRAL_OPT);

  /* the order in which these are evaluated matters */

  /* the following two are mutually exclusive.  
     pick one if they're both set. */
  if ((option & REGULAR_SPIRAL) && (option & FIT_SPIRAL))
    {
      /* unset REGULAR_SPIRAL half the time */
      if (rmg_rndm (2) && (option & REGULAR_SPIRAL))
        option -= REGULAR_SPIRAL;
      else
        option -= FIT_SPIRAL;
    }

  xscale = yscale = MAX_FINE;   /* fine spiral */

  /* choose the spiral pitch */
  if (!(option & FINE_SPIRAL))
    {
      float pitch = (rmg_rndm (5)) / 10. + 10. / 22.;

      xscale = yscale = pitch;
    }

  if ((option & FIT_SPIRAL) && (xsize != ysize))
    {
      if (xsize > ysize)
        xscale *= (float) xsize / (float) ysize;
      else
        yscale *= (float) ysize / (float) xsize;
    }

  if (option & REGULAR_SPIRAL)
    {
      float scale = MIN (xscale, yscale);

      xscale = yscale = scale;
    }

  /* cut out the spiral */
  while ((fabs (x) < SizeX) && (fabs (y) < SizeY))
    {
      x = parm * cos (parm) * xscale;
      y = parm * sin (parm) * yscale;
      maze[int (ic + x)][int (jc + y)] = '\0';
      parm += 0.01;
    }

  maze[int (ic + x + 0.5)][int (jc + y + 0.5)] = '<';

  /* cut out the center in a 2x2 and place the center and downexit */
  maze[ic][jc + 1] = '>';
  maze[ic][jc] = 'C';
}

/* the following function connects disjoint spirals which may
   result from the symmetrization process. */
void
connect_spirals (int xsize, int ysize, int sym, char **layout)
{
  int i, j, ic = xsize / 2, jc = ysize / 2;

  if (sym == SYMMETRY_X)
    {
      layout[ic][jc] = 0;

      /* go left from map center */
      for (i = ic - 1, j = jc; i > 0 && layout[i][j] == '#'; i--)
        layout[i][j] = 0;

      /* go right */
      for (i = ic + 1, j = jc; i < xsize - 1 && layout[i][j] == '#'; i++)
        layout[i][j] = 0;
    }

  if (sym == SYMMETRY_Y)
    {
      layout[ic][jc] = 0;

      /* go up */
      for (i = ic, j = jc - 1; j > 0 && layout[i][j] == '#'; j--)
        layout[i][j] = 0;

      /* go down */
      for (i = ic, j = jc + 1; j < ysize - 1 && layout[i][j] == '#'; j++)
        layout[i][j] = 0;
    }

  if (sym == SYMMETRY_XY)
    {
      /* go left from map center */
      layout[ic][jc / 2] = 0;
      layout[ic / 2][jc] = 0;
      layout[ic][jc / 2 + jc] = 0;
      layout[ic / 2 + ic][jc] = 0;

      for (i = ic - 1, j = jc / 2; i > 0 && layout[i][j] == '#'; i--)
        {
          layout[i][j + jc] = 0;
          layout[i][j] = 0;
        }

      /* go right */
      for (i = ic + 1, j = jc / 2; i < xsize - 1 && layout[i][j] == '#'; i++)
        {
          layout[i][j + jc] = 0;
          layout[i][j] = 0;
        }

      /* go up */
      for (i = ic / 2, j = jc - 1; j > 0 && layout[i][j] == '#'; j--)
        {
          layout[i][j] = 0;
          layout[i + ic][j] = 0;
        }

      /* go down */
      for (i = ic / 2, j = jc + 1; j < ysize - 1 && layout[i][j] == '#'; j++)
        {
          layout[i][j] = 0;
          layout[i + ic][j] = 0;
        }

    }

  /* get rid of bad doors. */
  for (i = 0; i < xsize; i++)
    for (j = 0; j < ysize; j++)
      {
        if (layout[i][j] == 'D')
          {                     /* remove bad door. */
            int si = surround_check (layout, i, j, xsize, ysize);

            if (si != 3 && si != 12)
              {
                layout[i][j] = 0;
                /* back up and recheck any nearby doors */
                i = 0;
                j = 0;
              }
          }
      }
}

Revision:	1.16
Committed:	Mon Oct 12 14:00:58 2009 UTC (14 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_82, rel-2_81, rel-2_90
Changes since 1.15:	+7 -6 lines
Log Message:	clarify license
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.11	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	pippijn	1.7	*
4	root	1.12	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.10	* Copyright (©) 1994,2007 Mark Wedel
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.7	*
8	root	1.16	* 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	pippijn	1.7	*
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	root	1.10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	pippijn	1.7	* GNU General Public License for more details.
17			*
18	root	1.16	* 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	1.10	*
22	root	1.11	* The authors can be reached via e-mail to <support@deliantra.net>
23	pippijn	1.7	*/
24	elmex	1.1
25			/* The onion room generator:
26			Onion rooms are like this:
27
28			char **map_gen_spiral(int xsize, int ysize, int option);
29	root	1.14	*/
30	elmex	1.1
31			#include <global.h>
32			#include <random_map.h>
33
34	root	1.2	#define RANDOM_OPTIONS 0 /* Pick random options below */
35			#define REGULAR_SPIRAL 1 /* Regular spiral--distance increases constantly */
36			#define FINE_SPIRAL 2 /* uses the min. separation: most coiling */
37			#define FIT_SPIRAL 4 /* scale to a rectangular region, not square */
38			#define MAX_SPIRAL_OPT 8 /* this should be 2x the last real option */
39	elmex	1.1	#include <math.h>
40
41			#ifndef MIN
42	root	1.2	# define MIN(x,y) (((x)<(y))? (x):(y))
43	elmex	1.1	#endif
44			#ifndef MAX
45	root	1.2	# define MAX(x,y) (((x)<(y))? (y):(x))
46	elmex	1.1	#endif
47
48			#define MINDIST 3
49
50			#define MAX_FINE .454545
51
52	root	1.2	extern int surround_check (char **maze, int i, int j, int xsize, int ysize);
53
54	root	1.13	void
55	root	1.14	map_gen_spiral (Layout maze, int option)
56	root	1.2	{
57			int i, j;
58			float parm = 0;
59			float x = 0, y = 0;
60			int ic, jc;
61			float SizeX, SizeY;
62			float xscale, yscale;
63	elmex	1.1
64	root	1.13	/* slightly easier to fill and then cut */
65			maze->clear ('#');
66	elmex	1.1
67	root	1.13	int xsize = maze->w;
68			int ysize = maze->h;
69	root	1.2
70			ic = xsize / 2;
71			jc = ysize / 2;
72			SizeX = xsize / 2 - 2;
73			SizeY = ysize / 2 - 2;
74	elmex	1.1
75			/* select random options if necessary */
76	root	1.2	if (option == 0)
77	root	1.15	option = rmg_rndm (MAX_SPIRAL_OPT);
78	elmex	1.1
79	root	1.2	/* the order in which these are evaluated matters */
80	elmex	1.1
81			/* the following two are mutually exclusive.
82			pick one if they're both set. */
83	root	1.2	if ((option & REGULAR_SPIRAL) && (option & FIT_SPIRAL))
84	elmex	1.1	{
85			/* unset REGULAR_SPIRAL half the time */
86	root	1.15	if (rmg_rndm (2) && (option & REGULAR_SPIRAL))
87	elmex	1.1	option -= REGULAR_SPIRAL;
88			else
89			option -= FIT_SPIRAL;
90			}
91
92	root	1.2	xscale = yscale = MAX_FINE; /* fine spiral */
93
94	elmex	1.1	/* choose the spiral pitch */
95	root	1.2	if (!(option & FINE_SPIRAL))
96			{
97	root	1.15	float pitch = (rmg_rndm (5)) / 10. + 10. / 22.;
98	root	1.2
99			xscale = yscale = pitch;
100			}
101
102			if ((option & FIT_SPIRAL) && (xsize != ysize))
103			{
104			if (xsize > ysize)
105			xscale *= (float) xsize / (float) ysize;
106			else
107			yscale *= (float) ysize / (float) xsize;
108			}
109
110			if (option & REGULAR_SPIRAL)
111			{
112			float scale = MIN (xscale, yscale);
113
114			xscale = yscale = scale;
115			}
116	elmex	1.1
117			/* cut out the spiral */
118	root	1.2	while ((fabs (x) < SizeX) && (fabs (y) < SizeY))
119	elmex	1.1	{
120	root	1.2	x = parm * cos (parm) * xscale;
121			y = parm * sin (parm) * yscale;
122	root	1.12	maze[int (ic + x)][int (jc + y)] = '\0';
123	root	1.2	parm += 0.01;
124	root	1.13	}
125	root	1.2
126	root	1.12	maze[int (ic + x + 0.5)][int (jc + y + 0.5)] = '<';
127	elmex	1.1
128			/* cut out the center in a 2x2 and place the center and downexit */
129	root	1.2	maze[ic][jc + 1] = '>';
130			maze[ic][jc] = 'C';
131	elmex	1.1	}
132
133			/* the following function connects disjoint spirals which may
134			result from the symmetrization process. */
135	root	1.2	void
136			connect_spirals (int xsize, int ysize, int sym, char **layout)
137			{
138			int i, j, ic = xsize / 2, jc = ysize / 2;
139	elmex	1.1
140	root	1.4	if (sym == SYMMETRY_X)
141	root	1.2	{
142			layout[ic][jc] = 0;
143	root	1.14
144	root	1.2	/* go left from map center */
145			for (i = ic - 1, j = jc; i > 0 && layout[i][j] == '#'; i--)
146			layout[i][j] = 0;
147	root	1.14
148	root	1.2	/* go right */
149			for (i = ic + 1, j = jc; i < xsize - 1 && layout[i][j] == '#'; i++)
150			layout[i][j] = 0;
151	elmex	1.1	}
152
153	root	1.4	if (sym == SYMMETRY_Y)
154	root	1.2	{
155	root	1.14	layout[ic][jc] = 0;
156	root	1.2
157			/* go up */
158			for (i = ic, j = jc - 1; j > 0 && layout[i][j] == '#'; j--)
159			layout[i][j] = 0;
160	root	1.14
161	root	1.2	/* go down */
162			for (i = ic, j = jc + 1; j < ysize - 1 && layout[i][j] == '#'; j++)
163			layout[i][j] = 0;
164			}
165
166	root	1.4	if (sym == SYMMETRY_XY)
167	root	1.2	{
168			/* go left from map center */
169			layout[ic][jc / 2] = 0;
170			layout[ic / 2][jc] = 0;
171			layout[ic][jc / 2 + jc] = 0;
172			layout[ic / 2 + ic][jc] = 0;
173	root	1.14
174	root	1.2	for (i = ic - 1, j = jc / 2; i > 0 && layout[i][j] == '#'; i--)
175			{
176			layout[i][j + jc] = 0;
177			layout[i][j] = 0;
178			}
179	root	1.14
180	root	1.2	/* go right */
181			for (i = ic + 1, j = jc / 2; i < xsize - 1 && layout[i][j] == '#'; i++)
182			{
183			layout[i][j + jc] = 0;
184			layout[i][j] = 0;
185			}
186	root	1.14
187	root	1.2	/* go up */
188			for (i = ic / 2, j = jc - 1; j > 0 && layout[i][j] == '#'; j--)
189			{
190			layout[i][j] = 0;
191			layout[i + ic][j] = 0;
192			}
193	root	1.14
194	root	1.2	/* go down */
195			for (i = ic / 2, j = jc + 1; j < ysize - 1 && layout[i][j] == '#'; j++)
196			{
197			layout[i][j] = 0;
198			layout[i + ic][j] = 0;
199			}
200
201			}
202	elmex	1.1
203			/* get rid of bad doors. */
204	root	1.2	for (i = 0; i < xsize; i++)
205			for (j = 0; j < ysize; j++)
206			{
207			if (layout[i][j] == 'D')
208			{ /* remove bad door. */
209			int si = surround_check (layout, i, j, xsize, ysize);
210
211			if (si != 3 && si != 12)
212			{
213			layout[i][j] = 0;
214			/* back up and recheck any nearby doors */
215			i = 0;
216			j = 0;
217			}
218			}
219	elmex	1.1	}
220			}
221	root	1.14