/* $OpenBSD: attack.c,v 1.8 2016/01/07 14:37:51 mestre Exp $ */ /* $NetBSD: attack.c,v 1.3 1995/04/22 10:58:26 cgd Exp $ */ /* * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <math.h> #include <stdio.h> #include "trek.h" /* ** Klingon Attack Routine ** ** This routine performs the Klingon attack provided that ** (1) Something happened this move (i.e., not free), and ** (2) You are not cloaked. Note that if you issue the ** cloak command, you are not considered cloaked until you ** expend some time. ** ** Klingons are permitted to move both before and after the ** attack. They will tend to move toward you before the ** attack and away from you after the attack. ** ** Under certain conditions you can get a critical hit. This ** sort of hit damages devices. The probability that a given ** device is damaged depends on the device. Well protected ** devices (such as the computer, which is in the core of the ** ship and has considerable redundancy) almost never get ** damaged, whereas devices which are exposed (such as the ** warp engines) or which are particularly delicate (such as ** the transporter) have a much higher probability of being ** damaged. ** ** The actual amount of damage (i.e., how long it takes to fix ** it) depends on the amount of the hit and the "damfac[]" ** entry for the particular device. ** ** Casualties can also occur. */ /* argument is set if attack while resting */ void attack(int resting) { int hit, i, l; int maxhit, tothit, shldabsb; double chgfac, propor, extradm; double dustfac, tothe; int cas; int hitflag; if (Move.free) return; if (Etc.nkling <= 0 || Quad[Ship.quadx][Ship.quady].stars < 0) return; if (Ship.cloaked && Ship.cloakgood) return; /* move before attack */ klmove(0); if (Ship.cond == DOCKED) { if (!resting) printf("Starbase shields protect the %s\n", Ship.shipname); return; } /* setup shield effectiveness */ chgfac = 1.0; if (Move.shldchg) chgfac = 0.25 + 0.50 * franf(); maxhit = tothit = 0; hitflag = 0; /* let each Klingon do his damndest */ for (i = 0; i < Etc.nkling; i++) { /* if he's low on power he won't attack */ if (Etc.klingon[i].power < 20) continue; if (!hitflag) { printf("\nStardate %.2f: Klingon attack:\n", Now.date); hitflag++; } /* complete the hit */ dustfac = 0.90 + 0.01 * franf(); tothe = Etc.klingon[i].avgdist; hit = Etc.klingon[i].power * pow(dustfac, tothe) * Param.hitfac; /* deplete his energy */ dustfac = Etc.klingon[i].power; Etc.klingon[i].power = dustfac * Param.phasfac * (1.0 + (franf() - 0.5) * 0.2); /* see how much of hit shields will absorb */ shldabsb = 0; if (Ship.shldup || Move.shldchg) { propor = Ship.shield; propor /= Param.shield; shldabsb = propor * chgfac * hit; if (shldabsb > Ship.shield) shldabsb = Ship.shield; Ship.shield -= shldabsb; } /* actually do the hit */ printf("\aHIT: %d units", hit); if (!damaged(SRSCAN)) printf(" from %d,%d", Etc.klingon[i].x, Etc.klingon[i].y); cas = (shldabsb * 100) / hit; hit -= shldabsb; if (shldabsb > 0) printf(", shields absorb %d%%, effective hit %d\n", cas, hit); else printf("\n"); tothit += hit; if (hit > maxhit) maxhit = hit; Ship.energy -= hit; /* see if damages occurred */ if (hit >= (15 - Game.skill) * (25 - ranf(12))) { printf("\aCRITICAL HIT!!!\a\n"); /* select a device from probability vector */ cas = ranf(1000); for (l = 0; cas >= 0; l++) cas -= Param.damprob[l]; l -= 1; /* compute amount of damage */ extradm = (hit * Param.damfac[l]) / (75 + ranf(25)) + 0.5; /* damage the device */ damage(l, extradm); if (damaged(SHIELD)) { if (Ship.shldup) printf("Sulu: Shields knocked down, captain.\n"); Ship.shldup = 0; Move.shldchg = 0; } } if (Ship.energy <= 0) lose(L_DSTRYD); } /* see what our casualities are like */ if (maxhit >= 200 || tothit >= 500) { cas = tothit * 0.015 * franf(); if (cas >= 2) { printf("McCoy: we suffered %d casualties in that attack.\n", cas); Game.deaths += cas; Ship.crew -= cas; } } /* allow Klingons to move after attacking */ klmove(1); }
