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. 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. 20 * 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. 32 * 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 1.2 2003/06/17 04:25:25 dillon Exp $ 36 */ 37 38 # include "trek.h" 39 40 /* 41 ** Klingon Attack Routine 42 ** 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. 48 ** 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. 52 ** 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. 62 ** 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. 66 ** 67 ** Casualties can also occur. 68 */ 69 70 attack(resting) 71 int resting; /* set if attack while resting */ 72 { 73 int hit, i, l; 74 int maxhit, tothit, shldabsb; 75 double chgfac, propor, extradm; 76 double dustfac, tothe; 77 int cas; 78 int hitflag; 79 80 if (Move.free) 81 return; 82 if (Etc.nkling <= 0 || Quad[Ship.quadx][Ship.quady].stars < 0) 83 return; 84 if (Ship.cloaked && Ship.cloakgood) 85 return; 86 /* move before attack */ 87 klmove(0); 88 if (Ship.cond == DOCKED) 89 { 90 if (!resting) 91 printf("Starbase shields protect the %s\n", Ship.shipname); 92 return; 93 } 94 /* setup shield effectiveness */ 95 chgfac = 1.0; 96 if (Move.shldchg) 97 chgfac = 0.25 + 0.50 * franf(); 98 maxhit = tothit = 0; 99 hitflag = 0; 100 101 /* let each Klingon do his damndest */ 102 for (i = 0; i < Etc.nkling; i++) 103 { 104 /* if he's low on power he won't attack */ 105 if (Etc.klingon[i].power < 20) 106 continue; 107 if (!hitflag) 108 { 109 printf("\nStardate %.2f: Klingon attack:\n", 110 Now.date); 111 hitflag++; 112 } 113 /* complete the hit */ 114 dustfac = 0.90 + 0.01 * franf(); 115 tothe = Etc.klingon[i].avgdist; 116 hit = Etc.klingon[i].power * pow(dustfac, tothe) * Param.hitfac; 117 /* deplete his energy */ 118 dustfac = Etc.klingon[i].power; 119 Etc.klingon[i].power = dustfac * Param.phasfac * (1.0 + (franf() - 0.5) * 0.2); 120 /* see how much of hit shields will absorb */ 121 shldabsb = 0; 122 if (Ship.shldup || Move.shldchg) 123 { 124 propor = Ship.shield; 125 propor /= Param.shield; 126 shldabsb = propor * chgfac * hit; 127 if (shldabsb > Ship.shield) 128 shldabsb = Ship.shield; 129 Ship.shield -= shldabsb; 130 } 131 /* actually do the hit */ 132 printf("HIT: %d units", hit); 133 if (!damaged(SRSCAN)) 134 printf(" from %d,%d", Etc.klingon[i].x, Etc.klingon[i].y); 135 cas = (shldabsb * 100) / hit; 136 hit -= shldabsb; 137 if (shldabsb > 0) 138 printf(", shields absorb %d%%, effective hit %d\n", 139 cas, hit); 140 else 141 printf("\n"); 142 tothit += hit; 143 if (hit > maxhit) 144 maxhit = hit; 145 Ship.energy -= hit; 146 /* see if damages occurred */ 147 if (hit >= (15 - Game.skill) * (25 - ranf(12))) 148 { 149 printf("CRITICAL HIT!!!\n"); 150 /* select a device from probability vector */ 151 cas = ranf(1000); 152 for (l = 0; cas >= 0; l++) 153 cas -= Param.damprob[l]; 154 l -= 1; 155 /* compute amount of damage */ 156 extradm = (hit * Param.damfac[l]) / (75 + ranf(25)) + 0.5; 157 /* damage the device */ 158 damage(l, extradm); 159 if (damaged(SHIELD)) 160 { 161 if (Ship.shldup) 162 printf("Sulu: Shields knocked down, captain.\n"); 163 Ship.shldup = 0; 164 Move.shldchg = 0; 165 } 166 } 167 if (Ship.energy <= 0) 168 lose(L_DSTRYD); 169 } 170 171 /* see what our casualities are like */ 172 if (maxhit >= 200 || tothit >= 500) 173 { 174 cas = tothit * 0.015 * franf(); 175 if (cas >= 2) 176 { 177 printf("McCoy: we suffered %d casualties in that attack.\n", 178 cas); 179 Game.deaths += cas; 180 Ship.crew -= cas; 181 } 182 } 183 184 /* allow Klingons to move after attacking */ 185 klmove(1); 186 187 return; 188 } 189