2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program 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 2 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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * snxtsct.c: Arrange sector selection using either distance or area
30 * Known contributors to this file:
41 #include "prototypes.h"
45 * setup the nstr_sect structure for sector selection.
46 * can select on either NS_ALL, NS_AREA, or NS_RANGE
47 * iterate thru the "condarg" string looking
48 * for arguments to compile into the nstr.
51 snxtsct(struct nstr_sect *np, s_char *str)
59 if (str == 0 || *str == 0) {
60 if ((str = getstring("(sects)? ", buf)) == 0)
67 wr.width = wr.height = 0;
68 switch (sarg_type(str)) {
70 if (!sarg_area(str, &range))
72 snxtsct_area(np, &range);
75 if (!sarg_range(str, &cx, &cy, &dist))
77 snxtsct_dist(np, cx, cy, dist);
80 /* fake "all" by doing a world-sized area query */
81 snxtsct_area(np, &wr);
86 if (player->condarg == 0)
88 n = nstr_comp(np->cond, sizeof(np->cond) / sizeof(*np->cond),
89 EF_SECTOR, player->condarg);
90 np->ncond = n >= 0 ? n : 0;
95 snxtsct_all(struct nstr_sect *np)
97 struct range worldrange;
99 worldrange.lx = -WORLD_X / 2;
100 worldrange.ly = -WORLD_Y / 2;
101 worldrange.hx = WORLD_X / 2;
102 worldrange.hy = WORLD_Y / 2;
103 worldrange.width = worldrange.height = 0;
104 snxtsct_area(np, &worldrange);
108 snxtsct_area(struct nstr_sect *np, struct range *range)
110 memset(np, 0, sizeof(*np));
115 np->x = np->range.lx - 1;
116 np->y = np->range.ly;
119 xysize_range(&np->range);
123 snxtsct_rewind(struct nstr_sect *np)
125 np->x = np->range.lx - 1;
126 np->y = np->range.ly;
133 snxtsct_dist(struct nstr_sect *np, coord cx, coord cy, int dist)
135 memset(np, 0, sizeof(*np));
136 xydist_range(cx, cy, dist, &np->range);
143 np->x = np->range.lx - 1;
144 np->y = np->range.ly;
148 /* This function is now done elsewhere. */
149 /* It was not doing the right thing when the world was small */
150 xysize_range(&np->range);
155 xysize_range(struct range *rp)
157 if (rp->lx >= rp->hx)
158 rp->width = WORLD_X + rp->hx - rp->lx;
160 rp->width = rp->hx - rp->lx;
162 /* This is a necessary check for small, hitech worlds. */
163 if (rp->width > WORLD_X)
166 if (rp->ly >= rp->hy)
167 rp->height = WORLD_Y + rp->hy - rp->ly;
169 rp->height = rp->hy - rp->ly;
171 /* This is a necessary check for small, hitech worlds. */
172 if (rp->height > WORLD_Y)
173 rp->height = WORLD_Y;
177 /* This is called also called in snxtitem.c */
179 xydist_range(coord x, coord y, int dist, struct range *rp)
181 if (dist < WORLD_X / 4) {
182 rp->lx = xnorm((coord)(x - 2 * dist));
183 rp->hx = xnorm((coord)(x + 2 * dist) + 1);
184 rp->width = 4 * dist + 1;
186 /* Range is larger than the world */
187 /* Make sure we get lx in the right place. */
188 rp->lx = xnorm((coord)(x - WORLD_X / 2));
189 rp->hx = xnorm((coord)(rp->lx + WORLD_X - 1));
193 if (dist < WORLD_Y / 2) {
194 rp->ly = ynorm((coord)(y - dist));
195 rp->hy = ynorm((coord)(y + dist) + 1);
196 rp->height = 2 * dist + 1;
198 /* Range is larger than the world */
199 rp->ly = ynorm((coord)(y - WORLD_Y / 2));
200 rp->hy = ynorm((coord)(rp->ly + WORLD_Y - 1));
201 rp->height = WORLD_Y;