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 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 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 = 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 (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 = (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:	1.14
Committed:	Tue Apr 15 03:00:24 2008 UTC (16 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_5, rel-2_52
Changes since 1.13:	+11 -5 lines
Log Message:	new logging thread, fix bugs in random map generator
#	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	1.11	* Deliantra is free software: you can redistribute it and/or modify
9	pippijn	1.7	* it under the terms of the GNU General Public License as published by
10	root	1.10	* the Free Software Foundation, either version 3 of the License, or
11	pippijn	1.7	* (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	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			* You should have received a copy of the GNU General Public License
19	root	1.10	* along with this program. If not, see <http://www.gnu.org/licenses/>.
20			*
21	root	1.11	* The authors can be reached via e-mail to <support@deliantra.net>
22	pippijn	1.7	*/
23	elmex	1.1
24			/* The onion room generator:
25			Onion rooms are like this:
26
27			char **map_gen_spiral(int xsize, int ysize, int option);
28	root	1.14	*/
29	elmex	1.1
30			#include <global.h>
31			#include <random_map.h>
32
33	root	1.2	#define RANDOM_OPTIONS 0 /* Pick random options below */
34			#define REGULAR_SPIRAL 1 /* Regular spiral--distance increases constantly */
35			#define FINE_SPIRAL 2 /* uses the min. separation: most coiling */
36			#define FIT_SPIRAL 4 /* scale to a rectangular region, not square */
37			#define MAX_SPIRAL_OPT 8 /* this should be 2x the last real option */
38	elmex	1.1	#include <math.h>
39
40			#ifndef MIN
41	root	1.2	# define MIN(x,y) (((x)<(y))? (x):(y))
42	elmex	1.1	#endif
43			#ifndef MAX
44	root	1.2	# define MAX(x,y) (((x)<(y))? (y):(x))
45	elmex	1.1	#endif
46
47			#define MINDIST 3
48
49			#define MAX_FINE .454545
50
51	root	1.2	extern int surround_check (char **maze, int i, int j, int xsize, int ysize);
52
53	root	1.13	void
54	root	1.14	map_gen_spiral (Layout maze, int option)
55	root	1.2	{
56			int i, j;
57			float parm = 0;
58			float x = 0, y = 0;
59			int ic, jc;
60			float SizeX, SizeY;
61			float xscale, yscale;
62	elmex	1.1
63	root	1.13	/* slightly easier to fill and then cut */
64			maze->clear ('#');
65	elmex	1.1
66	root	1.13	int xsize = maze->w;
67			int ysize = maze->h;
68	root	1.2
69			ic = xsize / 2;
70			jc = ysize / 2;
71			SizeX = xsize / 2 - 2;
72			SizeY = ysize / 2 - 2;
73	elmex	1.1
74			/* select random options if necessary */
75	root	1.2	if (option == 0)
76	root	1.12	option = rndm (MAX_SPIRAL_OPT);
77	elmex	1.1
78	root	1.2	/* the order in which these are evaluated matters */
79	elmex	1.1
80			/* the following two are mutually exclusive.
81			pick one if they're both set. */
82	root	1.2	if ((option & REGULAR_SPIRAL) && (option & FIT_SPIRAL))
83	elmex	1.1	{
84			/* unset REGULAR_SPIRAL half the time */
85	root	1.8	if (rndm (2) && (option & REGULAR_SPIRAL))
86	elmex	1.1	option -= REGULAR_SPIRAL;
87			else
88			option -= FIT_SPIRAL;
89			}
90
91	root	1.2	xscale = yscale = MAX_FINE; /* fine spiral */
92
93	elmex	1.1	/* choose the spiral pitch */
94	root	1.2	if (!(option & FINE_SPIRAL))
95			{
96	root	1.8	float pitch = (rndm (5)) / 10. + 10. / 22.;
97	root	1.2
98			xscale = yscale = pitch;
99			}
100
101			if ((option & FIT_SPIRAL) && (xsize != ysize))
102			{
103			if (xsize > ysize)
104			xscale *= (float) xsize / (float) ysize;
105			else
106			yscale *= (float) ysize / (float) xsize;
107			}
108
109			if (option & REGULAR_SPIRAL)
110			{
111			float scale = MIN (xscale, yscale);
112
113			xscale = yscale = scale;
114			}
115	elmex	1.1
116			/* cut out the spiral */
117	root	1.2	while ((fabs (x) < SizeX) && (fabs (y) < SizeY))
118	elmex	1.1	{
119	root	1.2	x = parm * cos (parm) * xscale;
120			y = parm * sin (parm) * yscale;
121	root	1.12	maze[int (ic + x)][int (jc + y)] = '\0';
122	root	1.2	parm += 0.01;
123	root	1.13	}
124	root	1.2
125	root	1.12	maze[int (ic + x + 0.5)][int (jc + y + 0.5)] = '<';
126	elmex	1.1
127			/* cut out the center in a 2x2 and place the center and downexit */
128	root	1.2	maze[ic][jc + 1] = '>';
129			maze[ic][jc] = 'C';
130	elmex	1.1	}
131
132			/* the following function connects disjoint spirals which may
133			result from the symmetrization process. */
134	root	1.2	void
135			connect_spirals (int xsize, int ysize, int sym, char **layout)
136			{
137			int i, j, ic = xsize / 2, jc = ysize / 2;
138	elmex	1.1
139	root	1.4	if (sym == SYMMETRY_X)
140	root	1.2	{
141			layout[ic][jc] = 0;
142	root	1.14
143	root	1.2	/* go left from map center */
144			for (i = ic - 1, j = jc; i > 0 && layout[i][j] == '#'; i--)
145			layout[i][j] = 0;
146	root	1.14
147	root	1.2	/* go right */
148			for (i = ic + 1, j = jc; i < xsize - 1 && layout[i][j] == '#'; i++)
149			layout[i][j] = 0;
150	elmex	1.1	}
151
152	root	1.4	if (sym == SYMMETRY_Y)
153	root	1.2	{
154	root	1.14	layout[ic][jc] = 0;
155	root	1.2
156			/* go up */
157			for (i = ic, j = jc - 1; j > 0 && layout[i][j] == '#'; j--)
158			layout[i][j] = 0;
159	root	1.14
160	root	1.2	/* go down */
161			for (i = ic, j = jc + 1; j < ysize - 1 && layout[i][j] == '#'; j++)
162			layout[i][j] = 0;
163			}
164
165	root	1.4	if (sym == SYMMETRY_XY)
166	root	1.2	{
167			/* go left from map center */
168			layout[ic][jc / 2] = 0;
169			layout[ic / 2][jc] = 0;
170			layout[ic][jc / 2 + jc] = 0;
171			layout[ic / 2 + ic][jc] = 0;
172	root	1.14
173	root	1.2	for (i = ic - 1, j = jc / 2; i > 0 && layout[i][j] == '#'; i--)
174			{
175			layout[i][j + jc] = 0;
176			layout[i][j] = 0;
177			}
178	root	1.14
179	root	1.2	/* go right */
180			for (i = ic + 1, j = jc / 2; i < xsize - 1 && layout[i][j] == '#'; i++)
181			{
182			layout[i][j + jc] = 0;
183			layout[i][j] = 0;
184			}
185	root	1.14
186	root	1.2	/* go up */
187			for (i = ic / 2, j = jc - 1; j > 0 && layout[i][j] == '#'; j--)
188			{
189			layout[i][j] = 0;
190			layout[i + ic][j] = 0;
191			}
192	root	1.14
193	root	1.2	/* go down */
194			for (i = ic / 2, j = jc + 1; j < ysize - 1 && layout[i][j] == '#'; j++)
195			{
196			layout[i][j] = 0;
197			layout[i + ic][j] = 0;
198			}
199
200			}
201	elmex	1.1
202			/* get rid of bad doors. */
203	root	1.2	for (i = 0; i < xsize; i++)
204			for (j = 0; j < ysize; j++)
205			{
206			if (layout[i][j] == 'D')
207			{ /* remove bad door. */
208			int si = surround_check (layout, i, j, xsize, ysize);
209
210			if (si != 3 && si != 12)
211			{
212			layout[i][j] = 0;
213			/* back up and recheck any nearby doors */
214			i = 0;
215			j = 0;
216			}
217			}
218	elmex	1.1	}
219			}
220	root	1.14