Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / games / trek / attack.c
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1 /*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
33 * @(#)attack.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/trek/attack.c,v 1.4 1999/11/30 03:49:43 billf Exp $
35 * $DragonFly: src/games/trek/attack.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
38 # include "trek.h"
41 ** Klingon Attack Routine
43 ** This routine performs the Klingon attack provided that
44 ** (1) Something happened this move (i.e., not free), and
45 ** (2) You are not cloaked. Note that if you issue the
46 ** cloak command, you are not considered cloaked until you
47 ** expend some time.
49 ** Klingons are permitted to move both before and after the
50 ** attack. They will tend to move toward you before the
51 ** attack and away from you after the attack.
53 ** Under certain conditions you can get a critical hit. This
54 ** sort of hit damages devices. The probability that a given
55 ** device is damaged depends on the device. Well protected
56 ** devices (such as the computer, which is in the core of the
57 ** ship and has considerable redundancy) almost never get
58 ** damaged, whereas devices which are exposed (such as the
59 ** warp engines) or which are particularly delicate (such as
60 ** the transporter) have a much higher probability of being
61 ** damaged.
63 ** The actual amount of damage (i.e., how long it takes to fix
64 ** it) depends on the amount of the hit and the "damfac[]"
65 ** entry for the particular device.
67 ** Casualties can also occur.
70 void
71 attack(int resting)
72 /* resting: set if attack while resting */
74 int hit, i, l;
75 int maxhit, tothit, shldabsb;
76 double chgfac, propor, extradm;
77 double dustfac, tothe;
78 int cas;
79 int hitflag;
81 if (Move.free)
82 return;
83 if (Etc.nkling <= 0 || Quad[Ship.quadx][Ship.quady].stars < 0)
84 return;
85 if (Ship.cloaked && Ship.cloakgood)
86 return;
87 /* move before attack */
88 klmove(0);
89 if (Ship.cond == DOCKED)
91 if (!resting)
92 printf("Starbase shields protect the %s\n", Ship.shipname);
93 return;
95 /* setup shield effectiveness */
96 chgfac = 1.0;
97 if (Move.shldchg)
98 chgfac = 0.25 + 0.50 * franf();
99 maxhit = tothit = 0;
100 hitflag = 0;
102 /* let each Klingon do his damndest */
103 for (i = 0; i < Etc.nkling; i++)
105 /* if he's low on power he won't attack */
106 if (Etc.klingon[i].power < 20)
107 continue;
108 if (!hitflag)
110 printf("\nStardate %.2f: Klingon attack:\n",
111 Now.date);
112 hitflag++;
114 /* complete the hit */
115 dustfac = 0.90 + 0.01 * franf();
116 tothe = Etc.klingon[i].avgdist;
117 hit = Etc.klingon[i].power * pow(dustfac, tothe) * Param.hitfac;
118 /* deplete his energy */
119 dustfac = Etc.klingon[i].power;
120 Etc.klingon[i].power = dustfac * Param.phasfac * (1.0 + (franf() - 0.5) * 0.2);
121 /* see how much of hit shields will absorb */
122 shldabsb = 0;
123 if (Ship.shldup || Move.shldchg)
125 propor = Ship.shield;
126 propor /= Param.shield;
127 shldabsb = propor * chgfac * hit;
128 if (shldabsb > Ship.shield)
129 shldabsb = Ship.shield;
130 Ship.shield -= shldabsb;
132 /* actually do the hit */
133 printf("\aHIT: %d units", hit);
134 if (!damaged(SRSCAN))
135 printf(" from %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
136 cas = (shldabsb * 100) / hit;
137 hit -= shldabsb;
138 if (shldabsb > 0)
139 printf(", shields absorb %d%%, effective hit %d\n",
140 cas, hit);
141 else
142 printf("\n");
143 tothit += hit;
144 if (hit > maxhit)
145 maxhit = hit;
146 Ship.energy -= hit;
147 /* see if damages occurred */
148 if (hit >= (15 - Game.skill) * (25 - ranf(12)))
150 printf("\aCRITICAL HIT!!!\a\n");
151 /* select a device from probability vector */
152 cas = ranf(1000);
153 for (l = 0; cas >= 0; l++)
154 cas -= Param.damprob[l];
155 l -= 1;
156 /* compute amount of damage */
157 extradm = (hit * Param.damfac[l]) / (75 + ranf(25)) + 0.5;
158 /* damage the device */
159 damage(l, extradm);
160 if (damaged(SHIELD))
162 if (Ship.shldup)
163 printf("Sulu: Shields knocked down, captain.\n");
164 Ship.shldup = 0;
165 Move.shldchg = 0;
168 if (Ship.energy <= 0)
169 lose(L_DSTRYD);
172 /* see what our casualities are like */
173 if (maxhit >= 200 || tothit >= 500)
175 cas = tothit * 0.015 * franf();
176 if (cas >= 2)
178 printf("McCoy: we suffered %d casualties in that attack.\n",
179 cas);
180 Game.deaths += cas;
181 Ship.crew -= cas;
185 /* allow Klingons to move after attacking */
186 klmove(1);
188 return;