2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2020, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * snxtsct.c: Arrange sector selection using either distance or area
29 * Known contributors to this file:
31 * Markus Armbruster, 2006-2020
41 #include "prototypes.h"
45 * setup the nstr_sect structure for sector selection.
46 * can select on either NS_ALL, NS_AREA, or NS_DIST
47 * iterate thru the "condarg" string looking
48 * for arguments to compile into the nstr.
49 * Using this function for anything but command arguments is usually
50 * incorrect, because it respects conditionals. Use the snxtsct_FOO()
54 snxtsct(struct nstr_sect *np, char *str)
63 if (!(str = getstring("(sects)? ", buf)))
66 make_stale_if_command_arg(str);
67 switch (sarg_type(str)) {
69 if (!sarg_area(str, &range))
71 snxtsct_area(np, &range);
74 if (!sarg_range(str, &cx, &cy, &dist))
76 snxtsct_dist(np, cx, cy, dist);
80 * Can't use snxtsct_all(), as it would disclose the real
81 * origin. Use a world-sized area instead.
83 natp = getnatp(player->cnum);
84 range.lx = xabs(natp, -WORLD_X / 2);
85 range.ly = yabs(natp, -WORLD_Y / 2);
86 range.hx = xnorm(range.lx + WORLD_X - 1);
87 range.hy = ynorm(range.ly + WORLD_Y - 1);
89 snxtsct_area(np, &range);
94 return snxtsct_use_condarg(np);
98 snxtsct_all(struct nstr_sect *np)
100 struct range worldrange;
104 worldrange.hx = WORLD_X - 1;
105 worldrange.hy = WORLD_Y - 1;
106 xysize_range(&worldrange);
107 snxtsct_area(np, &worldrange);
111 snxtsct_area(struct nstr_sect *np, struct range *range)
113 memset(np, 0, sizeof(*np));
117 np->x = np->range.lx - 1;
118 np->y = np->range.ly;
124 snxtsct_use_condarg(struct nstr_sect *np)
128 if (!player->condarg)
130 n = nstr_comp(np->cond, ARRAY_SIZE(np->cond),
131 EF_SECTOR, player->condarg);
139 snxtsct_rewind(struct nstr_sect *np)
141 np->x = np->range.lx - 1;
142 np->y = np->range.ly;
149 snxtsct_dist(struct nstr_sect *np, coord cx, coord cy, int dist)
151 memset(np, 0, sizeof(*np));
152 xydist_range(cx, cy, dist, &np->range);
158 np->x = np->range.lx - 1;
159 np->y = np->range.ly;