1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)attack.c 8.1 (Berkeley) 5/31/93 30 * $FreeBSD: src/games/trek/attack.c,v 1.4 1999/11/30 03:49:43 billf Exp $ 31 * $DragonFly: src/games/trek/attack.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $ 32 */ 33 34 #include "trek.h" 35 36 /* 37 ** Klingon Attack Routine 38 ** 39 ** This routine performs the Klingon attack provided that 40 ** (1) Something happened this move (i.e., not free), and 41 ** (2) You are not cloaked. Note that if you issue the 42 ** cloak command, you are not considered cloaked until you 43 ** expend some time. 44 ** 45 ** Klingons are permitted to move both before and after the 46 ** attack. They will tend to move toward you before the 47 ** attack and away from you after the attack. 48 ** 49 ** Under certain conditions you can get a critical hit. This 50 ** sort of hit damages devices. The probability that a given 51 ** device is damaged depends on the device. Well protected 52 ** devices (such as the computer, which is in the core of the 53 ** ship and has considerable redundancy) almost never get 54 ** damaged, whereas devices which are exposed (such as the 55 ** warp engines) or which are particularly delicate (such as 56 ** the transporter) have a much higher probability of being 57 ** damaged. 58 ** 59 ** The actual amount of damage (i.e., how long it takes to fix 60 ** it) depends on the amount of the hit and the "damfac[]" 61 ** entry for the particular device. 62 ** 63 ** Casualties can also occur. 64 */ 65 66 /* resting: set if attack while resting */ 67 void 68 attack(int resting) 69 { 70 int hit, i, l; 71 int maxhit, tothit, shldabsb; 72 double chgfac, propor, extradm; 73 double dustfac, tothe; 74 int cas; 75 int hitflag; 76 77 if (Move.free) 78 return; 79 if (Etc.nkling <= 0 || Quad[Ship.quadx][Ship.quady].stars < 0) 80 return; 81 if (Ship.cloaked && Ship.cloakgood) 82 return; 83 /* move before attack */ 84 klmove(0); 85 if (Ship.cond == DOCKED) { 86 if (!resting) 87 printf("Starbase shields protect the %s\n", Ship.shipname); 88 return; 89 } 90 /* setup shield effectiveness */ 91 chgfac = 1.0; 92 if (Move.shldchg) 93 chgfac = 0.25 + 0.50 * franf(); 94 maxhit = tothit = 0; 95 hitflag = 0; 96 97 /* let each Klingon do his damndest */ 98 for (i = 0; i < Etc.nkling; i++) { 99 /* if he's low on power he won't attack */ 100 if (Etc.klingon[i].power < 20) 101 continue; 102 if (!hitflag) { 103 printf("\nStardate %.2f: Klingon attack:\n", 104 Now.date); 105 hitflag++; 106 } 107 /* complete the hit */ 108 dustfac = 0.90 + 0.01 * franf(); 109 tothe = Etc.klingon[i].avgdist; 110 hit = Etc.klingon[i].power * pow(dustfac, tothe) * Param.hitfac; 111 /* deplete his energy */ 112 dustfac = Etc.klingon[i].power; 113 Etc.klingon[i].power = dustfac * Param.phasfac * (1.0 + (franf() - 0.5) * 0.2); 114 /* see how much of hit shields will absorb */ 115 shldabsb = 0; 116 if (Ship.shldup || Move.shldchg) { 117 propor = Ship.shield; 118 propor /= Param.shield; 119 shldabsb = propor * chgfac * hit; 120 if (shldabsb > Ship.shield) 121 shldabsb = Ship.shield; 122 Ship.shield -= shldabsb; 123 } 124 /* actually do the hit */ 125 printf("\aHIT: %d units", hit); 126 if (!damaged(SRSCAN)) 127 printf(" from %d,%d", Etc.klingon[i].x, Etc.klingon[i].y); 128 cas = (shldabsb * 100) / hit; 129 hit -= shldabsb; 130 if (shldabsb > 0) 131 printf(", shields absorb %d%%, effective hit %d\n", 132 cas, hit); 133 else 134 printf("\n"); 135 tothit += hit; 136 if (hit > maxhit) 137 maxhit = hit; 138 Ship.energy -= hit; 139 /* see if damages occurred */ 140 if (hit >= (15 - Game.skill) * (25 - ranf(12))) { 141 printf("\aCRITICAL HIT!!!\a\n"); 142 /* select a device from probability vector */ 143 cas = ranf(1000); 144 for (l = 0; cas >= 0; l++) 145 cas -= Param.damprob[l]; 146 l -= 1; 147 /* compute amount of damage */ 148 extradm = (hit * Param.damfac[l]) / (75 + ranf(25)) + 0.5; 149 /* damage the device */ 150 damage(l, extradm); 151 if (damaged(SHIELD)) { 152 if (Ship.shldup) 153 printf("Sulu: Shields knocked down, captain.\n"); 154 Ship.shldup = 0; 155 Move.shldchg = 0; 156 } 157 } 158 if (Ship.energy <= 0) 159 lose(L_DSTRYD); 160 } 161 162 /* see what our casualities are like */ 163 if (maxhit >= 200 || tothit >= 500) { 164 cas = tothit * 0.015 * franf(); 165 if (cas >= 2) { 166 printf("McCoy: we suffered %d casualties in that attack.\n", 167 cas); 168 Game.deaths += cas; 169 Ship.crew -= cas; 170 } 171 } 172 173 /* allow Klingons to move after attacking */ 174 klmove(1); 175 176 return; 177 } 178