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36 static char sccsid[] = "@(#)move.c 8.1 (Berkeley) 5/31/93";
38 static const char rcsid[] =
45 ** Move Under Warp or Impulse Power
47 ** `Ramflag' is set if we are to be allowed to ram stars,
48 ** Klingons, etc. This is passed from warp(), which gets it from
49 ** either play() or ram(). Course is the course (0 -> 360) at
50 ** which we want to move. `Speed' is the speed we
51 ** want to go, and `time' is the expected time. It
52 ** can get cut short if a long range tractor beam is to occur. We
53 ** cut short the move so that the user doesn't get docked time and
54 ** energy for distance which he didn't travel.
56 ** We check the course through the current quadrant to see that he
57 ** doesn't run into anything. After that, though, space sort of
58 ** bends around him. Note that this puts us in the awkward posi-
59 ** tion of being able to be dropped into a sector which is com-
60 ** pletely surrounded by stars. Oh Well.
62 ** If the SINS (Space Inertial Navigation System) is out, we ran-
63 ** domize the course accordingly before ever starting to move.
64 ** We will still move in a straight line.
66 ** Note that if your computer is out, you ram things anyway. In
67 ** other words, if your computer and sins are both out, you're in
68 ** potentially very bad shape.
70 ** Klingons get a chance to zap you as you leave the quadrant.
71 ** By the way, they also try to follow you (heh heh).
73 ** Return value is the actual amount of time used.
79 double move(ramflag, course, time, speed)
98 printf("move: ramflag %d course %d time %.2f speed %.2f\n",
99 ramflag, course, time, speed);
102 /* initialize delta factors for move */
103 angle = course * 0.0174532925;
105 angle += Param.navigcrud[1] * (franf() - 0.5);
108 angle += Param.navigcrud[0] * (franf() - 0.5);
118 /* check for long range tractor beams */
119 /**** TEMPORARY CODE == DEBUGGING ****/
120 evtime = Now.eventptr[E_LRTB]->date - Now.date;
123 printf("E.ep = %p, ->evcode = %d, ->date = %.2f, evtime = %.2f\n",
124 (void *)Now.eventptr[E_LRTB],
125 Now.eventptr[E_LRTB]->evcode,
126 Now.eventptr[E_LRTB]->date, evtime);
128 if (time > evtime && Etc.nkling < 3)
130 /* then we got a LRTB */
138 /* move within quadrant */
139 Sect[Ship.sectx][Ship.secty] = EMPTY;
140 x = Ship.sectx + 0.5;
141 y = Ship.secty + 0.5;
142 xn = NSECTS * dist * bigger;
146 printf("dx = %.2f, dy = %.2f, xn = %.2f, n = %d\n", dx, dy, xn, n);
150 for (i = 0; i < n; i++)
156 printf("ix = %d, x = %.2f, iy = %d, y = %.2f\n", ix, x, iy, y);
158 if (x < 0.0 || y < 0.0 || x >= sectsize || y >= sectsize)
160 /* enter new quadrant */
161 dx = Ship.quadx * NSECTS + Ship.sectx + dx * xn;
162 dy = Ship.quady * NSECTS + Ship.secty + dy * xn;
173 printf("New quad: ix = %d, iy = %d\n", ix, iy);
181 Ship.quadx = ix / NSECTS;
182 Ship.quady = iy / NSECTS;
183 Ship.sectx = ix % NSECTS;
184 Ship.secty = iy % NSECTS;
185 if (ix < 0 || Ship.quadx >= NQUADS || iy < 0 || Ship.quady >= NQUADS)
187 if (!damaged(COMPUTER))
198 if (Sect[ix][iy] != EMPTY)
200 /* we just hit something */
201 if (!damaged(COMPUTER) && ramflag <= 0)
205 printf("Computer reports navigation error; %s stopped at %d,%d\n",
206 Ship.shipname, ix, iy);
207 Ship.energy -= Param.stopengy * speed;
210 /* test for a black hole */
211 if (Sect[ix][iy] == HOLE)
213 /* get dumped elsewhere in the galaxy */
225 dx = Ship.sectx - ix;
226 dy = Ship.secty - iy;
227 dist = sqrt(dx * dx + dy * dy) / NSECTS;
230 time = evtime; /* spring the LRTB trap */
234 Sect[Ship.sectx][Ship.secty] = Ship.ship;