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Annotation of 43BSD/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.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)warp.c     5.1 (Berkeley) 1/29/86";
        !             9: #endif not lint
        !            10: 
        !            11: # include      "trek.h"
        !            12: 
        !            13: /*
        !            14: **  MOVE UNDER WARP POWER
        !            15: **
        !            16: **     This is both the "move" and the "ram" commands, differing
        !            17: **     only in the flag 'fl'.  It is also used for automatic
        !            18: **     emergency override mode, when 'fl' is < 0 and 'c' and 'd'
        !            19: **     are the course and distance to be moved.  If 'fl' >= 0,
        !            20: **     the course and distance are asked of the captain.
        !            21: **
        !            22: **     The guts of this routine are in the routine move(), which
        !            23: **     is shared with impulse().  Also, the working part of this
        !            24: **     routine is very small; the rest is to handle the slight chance
        !            25: **     that you may be moving at some riduculous speed.  In that
        !            26: **     case, there is code to handle time warps, etc.
        !            27: */
        !            28: 
        !            29: warp(fl, c, d)
        !            30: int    fl, c;
        !            31: double d;
        !            32: {
        !            33:        int                     course;
        !            34:        double                  power;
        !            35:        double                  dist;
        !            36:        double                  time;
        !            37:        double                  speed;
        !            38:        double                  frac;
        !            39:        register int            percent;
        !            40:        register int            i;
        !            41:        extern double           move();
        !            42: 
        !            43:        if (Ship.cond == DOCKED)
        !            44:                return (printf("%s is docked\n", Ship.shipname));
        !            45:        if (damaged(WARP))
        !            46:        {
        !            47:                return (out(WARP));
        !            48:        }
        !            49:        if (fl < 0)
        !            50:        {
        !            51:                course = c;
        !            52:                dist = d;
        !            53:        }
        !            54:        else
        !            55:                if (getcodi(&course, &dist))
        !            56:                        return;
        !            57: 
        !            58:        /* check to see that we are not using an absurd amount of power */
        !            59:        power = (dist + 0.05) * Ship.warp3;
        !            60:        percent = 100 * power / Ship.energy + 0.5;
        !            61:        if (percent >= 85)
        !            62:        {
        !            63:                printf("Scotty: That would consume %d%% of our remaining energy.\n",
        !            64:                        percent);
        !            65:                if (!getynpar("Are you sure that is wise"))
        !            66:                        return;
        !            67:        }
        !            68: 
        !            69:        /* compute the speed we will move at, and the time it will take */
        !            70:        speed = Ship.warp2 / Param.warptime;
        !            71:        time = dist / speed;
        !            72: 
        !            73:        /* check to see that that value is not ridiculous */
        !            74:        percent = 100 * time / Now.time + 0.5;
        !            75:        if (percent >= 85)
        !            76:        {
        !            77:                printf("Spock: That would take %d%% of our remaining time.\n",
        !            78:                        percent);
        !            79:                if (!getynpar("Are you sure that is wise"))
        !            80:                        return;
        !            81:        }
        !            82: 
        !            83:        /* compute how far we will go if we get damages */
        !            84:        if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0))
        !            85:        {
        !            86:                frac = franf();
        !            87:                dist *= frac;
        !            88:                time *= frac;
        !            89:                damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20);
        !            90:        }
        !            91: 
        !            92:        /* do the move */
        !            93:        Move.time = move(fl, course, time, speed);
        !            94: 
        !            95:        /* see how far we actually went, and decrement energy appropriately */
        !            96:        dist = Move.time * speed;
        !            97:        Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1);
        !            98: 
        !            99:        /* test for bizarre events */
        !           100:        if (Ship.warp <= 9.0)
        !           101:                return;
        !           102:        printf("\n\n  ___ Speed exceeding warp nine ___\n\n");
        !           103:        sleep(2);
        !           104:        printf("Ship's safety systems malfunction\n");
        !           105:        sleep(2);
        !           106:        printf("Crew experiencing extreme sensory distortion\n");
        !           107:        sleep(4);
        !           108:        if (ranf(100) >= 100 * dist)
        !           109:        {
        !           110:                return (printf("Equilibrium restored -- all systems normal\n"));
        !           111:        }
        !           112: 
        !           113:        /* select a bizzare thing to happen to us */
        !           114:        percent = ranf(100);
        !           115:        if (percent < 70)
        !           116:        {
        !           117:                /* time warp */
        !           118:                if (percent < 35 || !Game.snap)
        !           119:                {
        !           120:                        /* positive time warp */
        !           121:                        time = (Ship.warp - 8.0) * dist * (franf() + 1.0);
        !           122:                        Now.date += time;
        !           123:                        printf("Positive time portal entered -- it is now Stardate %.2f\n",
        !           124:                                Now.date);
        !           125:                        for (i = 0; i < MAXEVENTS; i++)
        !           126:                        {
        !           127:                                percent = Event[i].evcode;
        !           128:                                if (percent == E_FIXDV || percent == E_LRTB)
        !           129:                                        Event[i].date += time;
        !           130:                        }
        !           131:                        return;
        !           132:                }
        !           133: 
        !           134:                /* s/he got lucky: a negative time portal */
        !           135:                time = Now.date;
        !           136:                i = (int) Etc.snapshot;
        !           137:                bmove(i, Quad, sizeof Quad);
        !           138:                bmove(i += sizeof Quad, Event, sizeof Event);
        !           139:                bmove(i += sizeof Event, &Now, sizeof Now);
        !           140:                printf("Negative time portal entered -- it is now Stardate %.2f\n",
        !           141:                        Now.date);
        !           142:                for (i = 0; i < MAXEVENTS; i++)
        !           143:                        if (Event[i].evcode == E_FIXDV)
        !           144:                                reschedule(&Event[i], Event[i].date - time);
        !           145:                return;
        !           146:        }
        !           147: 
        !           148:        /* test for just a lot of damage */
        !           149:        if (percent < 80)
        !           150:                lose(L_TOOFAST);
        !           151:        printf("Equilibrium restored -- extreme damage occured to ship systems\n");
        !           152:        for (i = 0; i < NDEV; i++)
        !           153:                damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]);
        !           154:        Ship.shldup = 0;
        !           155: }

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