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Annotation of 43BSDReno/games/trek/warp.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted provided
        !             6:  * that: (1) source distributions retain this entire copyright notice and
        !             7:  * comment, and (2) distributions including binaries display the following
        !             8:  * acknowledgement:  ``This product includes software developed by the
        !             9:  * University of California, Berkeley and its contributors'' in the
        !            10:  * documentation or other materials provided with the distribution and in
        !            11:  * all advertising materials mentioning features or use of this software.
        !            12:  * Neither the name of the University nor the names of its contributors may
        !            13:  * be used to endorse or promote products derived from this software without
        !            14:  * specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)warp.c     5.4 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: # include      "trek.h"
        !            25: 
        !            26: /*
        !            27: **  MOVE UNDER WARP POWER
        !            28: **
        !            29: **     This is both the "move" and the "ram" commands, differing
        !            30: **     only in the flag 'fl'.  It is also used for automatic
        !            31: **     emergency override mode, when 'fl' is < 0 and 'c' and 'd'
        !            32: **     are the course and distance to be moved.  If 'fl' >= 0,
        !            33: **     the course and distance are asked of the captain.
        !            34: **
        !            35: **     The guts of this routine are in the routine move(), which
        !            36: **     is shared with impulse().  Also, the working part of this
        !            37: **     routine is very small; the rest is to handle the slight chance
        !            38: **     that you may be moving at some riduculous speed.  In that
        !            39: **     case, there is code to handle time warps, etc.
        !            40: */
        !            41: 
        !            42: warp(fl, c, d)
        !            43: int    fl, c;
        !            44: double d;
        !            45: {
        !            46:        int                     course;
        !            47:        double                  power;
        !            48:        double                  dist;
        !            49:        double                  time;
        !            50:        double                  speed;
        !            51:        double                  frac;
        !            52:        register int            percent;
        !            53:        register int            i;
        !            54:        extern double           move();
        !            55: 
        !            56:        if (Ship.cond == DOCKED)
        !            57:                return (printf("%s is docked\n", Ship.shipname));
        !            58:        if (damaged(WARP))
        !            59:        {
        !            60:                return (out(WARP));
        !            61:        }
        !            62:        if (fl < 0)
        !            63:        {
        !            64:                course = c;
        !            65:                dist = d;
        !            66:        }
        !            67:        else
        !            68:                if (getcodi(&course, &dist))
        !            69:                        return;
        !            70: 
        !            71:        /* check to see that we are not using an absurd amount of power */
        !            72:        power = (dist + 0.05) * Ship.warp3;
        !            73:        percent = 100 * power / Ship.energy + 0.5;
        !            74:        if (percent >= 85)
        !            75:        {
        !            76:                printf("Scotty: That would consume %d%% of our remaining energy.\n",
        !            77:                        percent);
        !            78:                if (!getynpar("Are you sure that is wise"))
        !            79:                        return;
        !            80:        }
        !            81: 
        !            82:        /* compute the speed we will move at, and the time it will take */
        !            83:        speed = Ship.warp2 / Param.warptime;
        !            84:        time = dist / speed;
        !            85: 
        !            86:        /* check to see that that value is not ridiculous */
        !            87:        percent = 100 * time / Now.time + 0.5;
        !            88:        if (percent >= 85)
        !            89:        {
        !            90:                printf("Spock: That would take %d%% of our remaining time.\n",
        !            91:                        percent);
        !            92:                if (!getynpar("Are you sure that is wise"))
        !            93:                        return;
        !            94:        }
        !            95: 
        !            96:        /* compute how far we will go if we get damages */
        !            97:        if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0))
        !            98:        {
        !            99:                frac = franf();
        !           100:                dist *= frac;
        !           101:                time *= frac;
        !           102:                damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20);
        !           103:        }
        !           104: 
        !           105:        /* do the move */
        !           106:        Move.time = move(fl, course, time, speed);
        !           107: 
        !           108:        /* see how far we actually went, and decrement energy appropriately */
        !           109:        dist = Move.time * speed;
        !           110:        Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1);
        !           111: 
        !           112:        /* test for bizarre events */
        !           113:        if (Ship.warp <= 9.0)
        !           114:                return;
        !           115:        printf("\n\n  ___ Speed exceeding warp nine ___\n\n");
        !           116:        sleep(2);
        !           117:        printf("Ship's safety systems malfunction\n");
        !           118:        sleep(2);
        !           119:        printf("Crew experiencing extreme sensory distortion\n");
        !           120:        sleep(4);
        !           121:        if (ranf(100) >= 100 * dist)
        !           122:        {
        !           123:                return (printf("Equilibrium restored -- all systems normal\n"));
        !           124:        }
        !           125: 
        !           126:        /* select a bizzare thing to happen to us */
        !           127:        percent = ranf(100);
        !           128:        if (percent < 70)
        !           129:        {
        !           130:                /* time warp */
        !           131:                if (percent < 35 || !Game.snap)
        !           132:                {
        !           133:                        /* positive time warp */
        !           134:                        time = (Ship.warp - 8.0) * dist * (franf() + 1.0);
        !           135:                        Now.date += time;
        !           136:                        printf("Positive time portal entered -- it is now Stardate %.2f\n",
        !           137:                                Now.date);
        !           138:                        for (i = 0; i < MAXEVENTS; i++)
        !           139:                        {
        !           140:                                percent = Event[i].evcode;
        !           141:                                if (percent == E_FIXDV || percent == E_LRTB)
        !           142:                                        Event[i].date += time;
        !           143:                        }
        !           144:                        return;
        !           145:                }
        !           146: 
        !           147:                /* s/he got lucky: a negative time portal */
        !           148:                time = Now.date;
        !           149:                i = (int) Etc.snapshot;
        !           150:                bmove(i, Quad, sizeof Quad);
        !           151:                bmove(i += sizeof Quad, Event, sizeof Event);
        !           152:                bmove(i += sizeof Event, &Now, sizeof Now);
        !           153:                printf("Negative time portal entered -- it is now Stardate %.2f\n",
        !           154:                        Now.date);
        !           155:                for (i = 0; i < MAXEVENTS; i++)
        !           156:                        if (Event[i].evcode == E_FIXDV)
        !           157:                                reschedule(&Event[i], Event[i].date - time);
        !           158:                return;
        !           159:        }
        !           160: 
        !           161:        /* test for just a lot of damage */
        !           162:        if (percent < 80)
        !           163:                lose(L_TOOFAST);
        !           164:        printf("Equilibrium restored -- extreme damage occured to ship systems\n");
        !           165:        for (i = 0; i < NDEV; i++)
        !           166:                damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]);
        !           167:        Ship.shldup = 0;
        !           168: }

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