/* $OpenBSD: torped.c,v 1.4 2002/02/16 21:27:12 millert Exp $ */ /* $NetBSD: torped.c,v 1.3 1995/04/22 10:59:34 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. */ #ifndef lint #if 0 static char sccsid[] = "@(#)torped.c 8.1 (Berkeley) 5/31/93"; #else static char rcsid[] = "$OpenBSD: torped.c,v 1.4 2002/02/16 21:27:12 millert Exp $"; #endif #endif /* not lint */ #include #include #include "trek.h" #include "getpar.h" static int randcourse(int); /* ** PHOTON TORPEDO CONTROL ** ** Either one or three photon torpedoes are fired. If three ** are fired, it is called a "burst" and you also specify ** a spread angle. ** ** Torpedoes are never 100% accurate. There is always a random ** cludge factor in their course which is increased if you have ** your shields up. Hence, you will find that they are more ** accurate at close range. However, they have the advantage that ** at long range they don't lose any of their power as phasers ** do, i.e., a hit is a hit is a hit, by any other name. ** ** When the course spreads too much, you get a misfire, and the ** course is randomized even more. You also have the chance that ** the misfire damages your torpedo tubes. */ void torped(v) int v; { register int ix, iy; double x, y, dx, dy; double angle; int course, course2; register int k; double bigger; double sectsize; int burst; int n; if (Ship.cloaked) { printf("Federation regulations do not permit attack while cloaked.\n"); return; } if (check_out(TORPED)) return; if (Ship.torped <= 0) { printf("All photon torpedos expended\n"); return; } /* get the course */ course = getintpar("Torpedo course"); if (course < 0 || course > 360) return; burst = -1; /* need at least three torpedoes for a burst */ if (Ship.torped < 3) { printf("No-burst mode selected\n"); burst = 0; } else { /* see if the user wants one */ if (!testnl()) { k = ungetc(getchar(), stdin); if (k >= '0' && k <= '9') burst = 1; } } if (burst < 0) { burst = getynpar("Do you want a burst"); } if (burst) { burst = getintpar("burst angle"); if (burst <= 0) return; if (burst > 15) { printf("Maximum burst angle is 15 degrees\n"); return; } } sectsize = NSECTS; n = -1; if (burst) { n = 1; course -= burst; } for (; n && n <= 3; n++) { /* select a nice random course */ course2 = course + randcourse(n); angle = course2 * 0.0174532925; /* convert to radians */ dx = -cos(angle); dy = sin(angle); bigger = fabs(dx); x = fabs(dy); if (x > bigger) bigger = x; dx /= bigger; dy /= bigger; x = Ship.sectx + 0.5; y = Ship.secty + 0.5; if (Ship.cond != DOCKED) Ship.torped -= 1; printf("Torpedo track"); if (n > 0) printf(", torpedo number %d", n); printf(":\n%6.1f\t%4.1f\n", x, y); while (1) { ix = x += dx; iy = y += dy; if (x < 0.0 || x >= sectsize || y < 0.0 || y >= sectsize) { printf("Torpedo missed\n"); break; } printf("%6.1f\t%4.1f\n", x, y); switch (Sect[ix][iy]) { case EMPTY: continue; case HOLE: printf("Torpedo disappears into a black hole\n"); break; case KLINGON: for (k = 0; k < Etc.nkling; k++) { if (Etc.klingon[k].x != ix || Etc.klingon[k].y != iy) continue; Etc.klingon[k].power -= 500 + ranf(501); if (Etc.klingon[k].power > 0) { printf("*** Hit on Klingon at %d,%d: extensive damages\n", ix, iy); break; } killk(ix, iy); break; } break; case STAR: nova(ix, iy); break; case INHABIT: kills(ix, iy, -1); break; case BASE: killb(Ship.quadx, Ship.quady); Game.killb += 1; break; default: printf("Unknown object %c at %d,%d destroyed\n", Sect[ix][iy], ix, iy); Sect[ix][iy] = EMPTY; break; } break; } if (damaged(TORPED) || Quad[Ship.quadx][Ship.quady].stars < 0) break; course += burst; } Move.free = 0; } /* ** RANDOMIZE COURSE ** ** This routine randomizes the course for torpedo number 'n'. ** Other things handled by this routine are misfires, damages ** to the tubes, etc. */ static int randcourse(n) int n; { double r; register int d; d = ((franf() + franf()) - 1.0) * 20; if (abs(d) > 12) { printf("Photon tubes misfire"); if (n < 0) printf("\n"); else printf(" on torpedo %d\n", n); if (ranf(2)) { damage(TORPED, 0.2 * abs(d) * (franf() + 1.0)); } d *= 1.0 + 2.0 * franf(); } if (Ship.shldup || Ship.cond == DOCKED) { r = Ship.shield; r = 1.0 + r / Param.shield; if (Ship.cond == DOCKED) r = 2.0; d *= r; } return (d); }