server/random_maps/expand2x.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) Crossfire Development Team (restored, original file without copyright notice)
 * 
 * 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>
 */

/*
 * Expands a layout by 2x in each dimension.
 * H. S. Teoh
 * --------------------------------------------------------------------------
 * $Id: expand2x.C,v 1.10 2010-07-01 01:22:44 root Exp $
 *
 * ALGORITHM
 *
 * ... (TBW)
 */

#include "global.h"
#include "random_map.h"
#include "rproto.h"

/* Copy the old tile X into the new one at location (i*2, j*2) and
 * fill up the rest of the 2x2 result with \0:
 *      X  ---> X  \0
 *              \0 \0
 */
static void
expand_misc (Layout &newlayout, int i, int j, Layout &layout)
{
  newlayout[i * 2][j * 2] = layout[i][j];
  /* (Note: no need to reset rest of 2x2 area to \0 because calloc does that
   * for us.) */
}

/* Returns a bitmap that represents which squares on the right and bottom
 * edges of a square (i,j) match the given character:
 *      1       match on (i+1, j)
 *      2       match on (i, j+1)
 *      4       match on (i+1, j+1)
 * and the possible combinations thereof.
 */
static int
calc_pattern (char ch, Layout &layout, int i, int j)
{
  int pattern = 0;

  if (i + 1 < layout.w && layout[i + 1][j] == ch)
    pattern |= 1;

  if (j + 1 < layout.h)
    {
      if (layout[i][j + 1] == ch)
        pattern |= 2;

      if (i + 1 < layout.w && layout[i + 1][j + 1] == ch)
        pattern |= 4;
    }

  return pattern;
}

/* Expand a wall. This function will try to sensibly connect the resulting
 * wall to adjacent wall squares, so that the result won't have disconnected
 * walls.
 */
static void
expand_wall (Layout &newlayout, int i, int j, Layout &layout)
{
  int wall_pattern = calc_pattern ('#', layout, i, j);
  int door_pattern = calc_pattern ('D', layout, i, j);
  int both_pattern = wall_pattern | door_pattern;

  newlayout[i * 2][j * 2] = '#';

  if (i + 1 < layout.w)
    {
      if (both_pattern & 1)
        {                       /* join walls/doors to the right */
/*      newlayout[i*2+1][j*2] = '#'; */
          newlayout[i * 2 + 1][j * 2] = layout[i + 1][j];
        }
    }

  if (j + 1 < layout.h)
    {
      if (both_pattern & 2)
        {                       /* join walls/doors to the bottom */
/*      newlayout[i*2][j*2+1] = '#'; */
          newlayout[i * 2][j * 2 + 1] = layout[i][j + 1];
        }

      if (wall_pattern == 7)
        {                       /* if orig layout is a 2x2 wall block,
                                 * we fill the result with walls. */
          newlayout[i * 2 + 1][j * 2 + 1] = '#';
        }
    }
}

/* This function will try to sensibly connect doors so that they meet up with
 * adjacent walls. Note that it will also presumptuously delete (ignore) doors
 * that it doesn't know how to correctly expand.
 */
static void
expand_door (Layout &newlayout, int i, int j, Layout &layout)
{
  int wall_pattern = calc_pattern ('#', layout, i, j);
  int door_pattern = calc_pattern ('D', layout, i, j);
  int join_pattern;

  /* Doors "like" to connect to walls more than other doors. If there is
   * a wall and another door, this door will connect to the wall and
   * disconnect from the other door. */
  if (wall_pattern & 3)
    join_pattern = wall_pattern;
  else
    join_pattern = door_pattern;

  newlayout[i * 2][j * 2] = 'D';

  if (i + 1 < layout.w)
    if (join_pattern & 1)
      /* there is a door/wall to the right */
      newlayout[i * 2 + 1][j * 2] = 'D';

  if (j + 1 < layout.h)
    if (join_pattern & 2)
      /* there is a door/wall below */
      newlayout[i * 2][j * 2 + 1] = 'D';
}

void
expand2x (Layout &layout)
{
  Layout new_layout (layout.w * 2 - 1, layout.h * 2 - 1);

  new_layout.clear ();

  for (int i = 0; i < layout.w; i++)
    for (int j = 0; j < layout.h; j++)
      switch (layout[i][j])
        {
          case '#': expand_wall (new_layout, i, j, layout); break; 
          case 'D': expand_door (new_layout, i, j, layout); break; 
          default:  expand_misc (new_layout, i, j, layout); break;
        }

  layout.swap (new_layout);
}

Revision:	1.11
Committed:	Fri Jul 2 03:40:14 2010 UTC (16 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.10:	+1 -1 lines
State:	*FILE REMOVED*
Log Message:	refactoring (untested)
#	User	Rev	Content
1	root	1.9	/*
2			* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3			*
4			* Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5			* Copyright (©) Crossfire Development Team (restored, original file without copyright notice)
6			*
7			* Deliantra is free software: you can redistribute it and/or modify it under
8			* the terms of the Affero GNU General Public License as published by the
9			* Free Software Foundation, either version 3 of the License, or (at your
10			* 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 Affero GNU General Public License
18			* and the GNU General Public License along with this program. If not, see
19			* <http://www.gnu.org/licenses/>.
20			*
21			* The authors can be reached via e-mail to <support@deliantra.net>
22			*/
23	root	1.5
24	elmex	1.1	/*
25			* Expands a layout by 2x in each dimension.
26			* H. S. Teoh
27			* --------------------------------------------------------------------------
28	root	1.11	* $Id: expand2x.C,v 1.10 2010-07-01 01:22:44 root Exp $
29	elmex	1.1	*
30			* ALGORITHM
31			*
32			* ... (TBW)
33			*/
34
35	root	1.6	#include "global.h"
36			#include "random_map.h"
37			#include "rproto.h"
38	elmex	1.1
39			/* Copy the old tile X into the new one at location (i2, j2) and
40			* fill up the rest of the 2x2 result with \0:
41			* X ---> X \0
42			* \0 \0
43			*/
44	root	1.3	static void
45	root	1.10	expand_misc (Layout &newlayout, int i, int j, Layout &layout)
46	root	1.3	{
47			newlayout[i * 2][j * 2] = layout[i][j];
48	elmex	1.1	/* (Note: no need to reset rest of 2x2 area to \0 because calloc does that
49			* for us.) */
50			}
51
52			/* Returns a bitmap that represents which squares on the right and bottom
53			* edges of a square (i,j) match the given character:
54			* 1 match on (i+1, j)
55			* 2 match on (i, j+1)
56			* 4 match on (i+1, j+1)
57			* and the possible combinations thereof.
58			*/
59	root	1.3	static int
60	root	1.10	calc_pattern (char ch, Layout &layout, int i, int j)
61	root	1.3	{
62	elmex	1.1	int pattern = 0;
63
64	root	1.10	if (i + 1 < layout.w && layout[i + 1][j] == ch)
65	elmex	1.1	pattern \|= 1;
66
67	root	1.10	if (j + 1 < layout.h)
68	root	1.3	{
69			if (layout[i][j + 1] == ch)
70			pattern \|= 2;
71	root	1.8
72	root	1.10	if (i + 1 < layout.w && layout[i + 1][j + 1] == ch)
73	root	1.3	pattern \|= 4;
74			}
75	elmex	1.1
76			return pattern;
77			}
78
79			/* Expand a wall. This function will try to sensibly connect the resulting
80			* wall to adjacent wall squares, so that the result won't have disconnected
81			* walls.
82			*/
83	root	1.3	static void
84	root	1.10	expand_wall (Layout &newlayout, int i, int j, Layout &layout)
85	root	1.3	{
86	root	1.7	int wall_pattern = calc_pattern ('#', layout, i, j);
87			int door_pattern = calc_pattern ('D', layout, i, j);
88	elmex	1.1	int both_pattern = wall_pattern \| door_pattern;
89
90	root	1.3	newlayout[i * 2][j * 2] = '#';
91	root	1.7
92	root	1.10	if (i + 1 < layout.w)
93	root	1.3	{
94			if (both_pattern & 1)
95			{ /* join walls/doors to the right */
96	elmex	1.1	/* newlayout[i2+1][j2] = '#'; */
97	root	1.3	newlayout[i * 2 + 1][j * 2] = layout[i + 1][j];
98			}
99	elmex	1.1	}
100
101	root	1.10	if (j + 1 < layout.h)
102	root	1.3	{
103			if (both_pattern & 2)
104			{ /* join walls/doors to the bottom */
105	elmex	1.1	/* newlayout[i2][j2+1] = '#'; */
106	root	1.3	newlayout[i * 2][j * 2 + 1] = layout[i][j + 1];
107			}
108	elmex	1.1
109	root	1.3	if (wall_pattern == 7)
110			{ /* if orig layout is a 2x2 wall block,
111			* we fill the result with walls. */
112			newlayout[i * 2 + 1][j * 2 + 1] = '#';
113			}
114	elmex	1.1	}
115			}
116
117			/* This function will try to sensibly connect doors so that they meet up with
118			* adjacent walls. Note that it will also presumptuously delete (ignore) doors
119			* that it doesn't know how to correctly expand.
120			*/
121	root	1.3	static void
122	root	1.10	expand_door (Layout &newlayout, int i, int j, Layout &layout)
123	root	1.3	{
124	root	1.7	int wall_pattern = calc_pattern ('#', layout, i, j);
125			int door_pattern = calc_pattern ('D', layout, i, j);
126	elmex	1.1	int join_pattern;
127
128			/* Doors "like" to connect to walls more than other doors. If there is
129			* a wall and another door, this door will connect to the wall and
130			* disconnect from the other door. */
131	root	1.3	if (wall_pattern & 3)
132	root	1.6	join_pattern = wall_pattern;
133	root	1.3	else
134	root	1.6	join_pattern = door_pattern;
135	root	1.3
136			newlayout[i * 2][j * 2] = 'D';
137	root	1.6
138	root	1.10	if (i + 1 < layout.w)
139	root	1.6	if (join_pattern & 1)
140			/* there is a door/wall to the right */
141			newlayout[i * 2 + 1][j * 2] = 'D';
142	root	1.3
143	root	1.10	if (j + 1 < layout.h)
144	root	1.6	if (join_pattern & 2)
145			/* there is a door/wall below */
146			newlayout[i * 2][j * 2 + 1] = 'D';
147	elmex	1.1	}
148	root	1.7
149			void
150	root	1.10	expand2x (Layout &layout)
151	root	1.7	{
152	root	1.10	Layout new_layout (layout.w * 2 - 1, layout.h * 2 - 1);
153	root	1.7
154	root	1.10	new_layout.clear ();
155
156			for (int i = 0; i < layout.w; i++)
157			for (int j = 0; j < layout.h; j++)
158	root	1.7	switch (layout[i][j])
159			{
160	root	1.10	case '#': expand_wall (new_layout, i, j, layout); break;
161			case 'D': expand_door (new_layout, i, j, layout); break;
162			default: expand_misc (new_layout, i, j, layout); break;
163	root	1.7	}
164
165	root	1.10	layout.swap (new_layout);
166	root	1.7	}
167