2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2004, 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 the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * projects/authors will amend these files as needed.
28 * radmap.c: Do a radar map given an x,y location, effic, and other
30 * Known contributors to this file:
43 #include "prototypes.h"
46 static void radmap2(int, int, int, int, int, double, int);
49 radmap(int cx, int cy, int eff, int range, double seesub)
51 radmap2(player->cnum, cx, cy, eff, range, seesub, 1);
55 radmapnopr(int cx, int cy, int eff, int range, double seesub)
57 radmap2(player->cnum, cx, cy, eff, range, seesub, 0);
61 radmapupd(int own, int cx, int cy, int eff, int range, double seesub)
63 radmap2(own, cx, cy, eff, range, seesub, 0);
66 /* More dynamic world sized buffers. We create 'em once, and then
67 * never again. No need to keep creating/tearing apart. We may
68 * want to do this in other places too where it doesn't matter. */
70 static s_char *radbuf;
72 static s_char *visbuf;
76 int cx, int cy, int eff, int range, double seesub, int pr_flag)
90 radbuf = (s_char *)malloc((WORLD_Y * (WORLD_X + 1)) *
93 visbuf = (s_char *)malloc((WORLD_Y * (WORLD_X + 1)) *
96 rad = (s_char **)malloc(WORLD_Y * sizeof(s_char *));
98 for (x = 0; x < WORLD_Y; x++)
99 rad[x] = &radbuf[(WORLD_X + 1) * x];
103 vis = (s_char **)malloc(WORLD_Y * sizeof(s_char *));
105 for (x = 0; x < WORLD_Y; x++)
106 vis[x] = &visbuf[(WORLD_X + 1) * x];
109 if (!radbuf || !visbuf || !rad || !vis) {
110 pr("Memory error in radmap2, tell the deity.\n");
114 memset(visbuf, 0, (WORLD_Y * (WORLD_X + 1)));
115 range = (int)(range * (eff / 100.0));
119 pr("%s efficiency %d%%, max range %d\n",
120 xyas(cx, cy, owner), eff, range);
121 snxtsct_dist(&ns, cx, cy, range);
122 blankfill((s_char *)radbuf, &ns.range, 1);
123 while (nxtsct(&ns, §)) {
124 if (sect.sct_own == owner
125 || sect.sct_type == SCT_WATER
126 || sect.sct_type == SCT_MOUNT
127 || sect.sct_type == SCT_WASTE
128 || ns.curdist <= range / 3)
129 rad[ns.dy][ns.dx] = dchr[sect.sct_type].d_mnem;
131 rad[ns.dy][ns.dx] = '?';
132 changed += map_set(owner, ns.x, ns.y, rad[ns.dy][ns.dx], 0);
138 snxtitem_dist(&ni, EF_PLANE, cx, cy, range);
139 while (nxtitem(&ni, &plane)) {
140 if (plane.pln_own == 0)
142 /* Used to have 'ghosts' when scanning whole world --ts */
143 x = deltx(&ns.range, (int)plane.pln_x);
144 y = delty(&ns.range, (int)plane.pln_y);
146 if ((plane.pln_flags & PLN_LAUNCHED) && plane.pln_own != owner) {
147 vis[y][x] = (s_char)100;
151 snxtitem_dist(&ni, EF_SHIP, cx, cy, range);
152 while (nxtitem(&ni, &ship)) {
153 if (ship.shp_own == 0)
155 /* Used to have 'ghosts' when scanning whole world --ts */
156 x = deltx(&ns.range, (int)ship.shp_x);
157 y = delty(&ns.range, (int)ship.shp_y);
159 rng = (int)(range * ship.shp_visib / 20.0);
160 if (ni.curdist > rng)
162 if ((mchr[(int)ship.shp_type].m_flags & M_SUB) &&
163 ni.curdist > rng * seesub)
165 if (ship.shp_visib > vis[y][x]) {
166 vis[y][x] = ship.shp_visib;
167 /* &~0x20 makes it a cap letter */
168 rad[y][x] = (*mchr[(int)ship.shp_type].m_name) & ~0x20;
172 * make the center of the display 0
173 * so ve et al can find it.
175 rad[deltay(cy, ns.range.ly)][deltax(cx, ns.range.lx)] = '0';
176 /* won't work for radar maps > WORLD_Y/2 */
178 /* This is not correct for small, hitech worlds. */
179 n = deltay(ns.range.hy, ns.range.ly);
181 /* This is already available, so why not use it. */
184 for (row = 0; row < n; row++)
185 pr("%s\n", rad[row]);
190 deltx(struct range *r, coord x)
198 return x + WORLD_X - r->lx;
202 delty(struct range *r, coord y)
210 return y + WORLD_Y - r->ly;