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 1.3 2006/09/07 21:19:44 pavalos 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 void 71 attack(int resting) 72 /* resting: set if attack while resting */ 73 { 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; 80 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) 90 { 91 if (!resting) 92 printf("Starbase shields protect the %s\n", Ship.shipname); 93 return; 94 } 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; 101 102 /* let each Klingon do his damndest */ 103 for (i = 0; i < Etc.nkling; i++) 104 { 105 /* if he's low on power he won't attack */ 106 if (Etc.klingon[i].power < 20) 107 continue; 108 if (!hitflag) 109 { 110 printf("\nStardate %.2f: Klingon attack:\n", 111 Now.date); 112 hitflag++; 113 } 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) 124 { 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; 131 } 132 /* actually do the hit */ 133 printf("HIT: %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))) 149 { 150 printf("CRITICAL HIT!!!\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)) 161 { 162 if (Ship.shldup) 163 printf("Sulu: Shields knocked down, captain.\n"); 164 Ship.shldup = 0; 165 Move.shldchg = 0; 166 } 167 } 168 if (Ship.energy <= 0) 169 lose(L_DSTRYD); 170 } 171 172 /* see what our casualities are like */ 173 if (maxhit >= 200 || tothit >= 500) 174 { 175 cas = tothit * 0.015 * franf(); 176 if (cas >= 2) 177 { 178 printf("McCoy: we suffered %d casualties in that attack.\n", 179 cas); 180 Game.deaths += cas; 181 Ship.crew -= cas; 182 } 183 } 184 185 /* allow Klingons to move after attacking */ 186 klmove(1); 187 188 return; 189 } 190