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Amiga Plus 1995 #2
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Amiga Plus CD - 1995 - No. 2.iso
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startrek
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trek73
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src
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moveships.c
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C/C++ Source or Header
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1995-04-11
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8KB
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384 lines
/*
* TREK73: moveships.c
*
* Actual command execution
*
* move_ships
*
*/
#include "defines.h"
#include "structs.h"
extern int defenseless;
extern int corbomite;
extern int surrender;
extern int surrenderp;
extern char shutup[];
extern int global;
extern int reengaged;
move_ships() {
extern double sin();
extern double cos();
extern double sqrt();
extern float fabs();
extern struct list head;
extern struct list *tail;
extern int shipnum;
extern struct ship *shiplist[];
register int i;
register int j;
register int k;
register struct list *lp;
register struct ship *sp;
struct torpedo *tp;
struct ship *fed;
struct list *lp1;
struct ship *sp1;
int iterations;
float tmpf;
int course, newcourse, energy;
float warp, newwarp;
int x, y;
struct ship *target;
int kills, others, fedstatus;
struct ship *ep;
double d0;
extern float segment;
extern float timeperturn;
float Mpersegment;
/*
* The value 100 is the number of Megameters per second
* per warp-factor
*/
Mpersegment = segment * 100.0;
iterations = timeperturn/segment;
for (i=0; i<=shipnum; i++)
distribute(shiplist[i]);
fed = shiplist[0];
for (i=0; i<iterations; i++) {
for (lp = &head; lp != NULL; lp = lp->fwd) {
if (lp == tail)
break;
if (lp->type == 0)
continue;
sp = NULL;
tp = NULL;
if (lp->type == I_SHIP)
sp = lp->data.sp;
else
tp = lp->data.tp;
if (sp && sp->status & S_DEAD)
continue;
if (sp) {
phaser_firing(sp);
torpedo_firing(sp);
}
/*
* time fuses
*/
if (tp) {
tp->timedelay--;
if (tp->timedelay <= 0) {
torp_detonate(tp, lp);
continue;
}
} else {
sp->delay--;
if (sp->delay <= 0) {
ship_detonate(sp, lp);
continue;
}
}
/*
* proximity fuse
*/
if (tp && tp->prox != 0) {
for (lp1 = &head; lp1 != tail; lp1 = lp1->fwd) {
if (lp1->type != I_SHIP)
continue;
sp1 = lp1->data.sp;
if (sp1 == tp->from)
continue;
j=rangefind(tp->x,sp1->x,tp->y,sp1->y);
if (j > tp->prox)
continue;
torp_detonate(tp, lp);
tp = 0;
break;
}
if (!tp)
continue;
}
/*
* movement simulation
*/
if (sp && sp->status & S_DEAD)
continue;
if (sp) {
x = sp->x;
y = sp->y;
warp = sp->warp;
newwarp = sp->newwarp;
course = sp->course;
newcourse = sp->newcourse;
target = sp->target;
energy = sp->energy;
/*
* fuel consumption
*/
if (fabs((double) warp) >= 1)
j = (int) (warp * sp->eff * segment);
else
j = 0;
if (j < 0)
j *= -1;
if (j > energy) {
if (!shutup[BURNOUT + sp->id] && !(sp->status & S_WARP)) {
printf("%s's warp drive burning out.\n",
sp->name);
shutup[BURNOUT + sp->id]++;
}
newwarp = warp < 0 ? -.99 : .99;
energy = 0;
} else
energy -= j;
} else {
x = tp->x;
y = tp->y;
warp = tp->speed;
newwarp = tp->newspeed;
course = tp->course;
newcourse = course;
target = tp->target;
}
/*
* destroyed warp drive
*/
if (sp && (sp->status & S_WARP))
if (fabs((double)warp) > 1.0)
newwarp = warp < 0.0 ? -.99 : .99;
/*
* automatic pilot
*/
if (target != NULL) {
if (sp && (target->status & S_DEAD)) {
if ((sp == fed) && (!shutup[DISENGAGE]) && !(sp->status & S_DEAD))
printf("%s's autopilot disengaging.\n",
sp->name);
newcourse = course;
shutup[DISENGAGE]++;
target = NULL;
sp->eluding = 0;
} else {
j = bearing(x, target->x, y, target->y);
if (sp && sp->eluding)
j = rectify(j + 180);
newcourse = (float) j;
/*if ((sp) && (sp != fed)) {
sp->newwarp = 1.0;
newwarp = 1.0;
}*/
if (tp)
course = newcourse;
}
}
/*
* turn rate
*/
if (course != newcourse) {
j = rectify(newcourse - course);
if (j > 180)
j -= 360;
/*
* maximum degrees turned in one turn
*/
k = (int) ((12.0 - warp) * 4.0 * segment);
if (sp->status & S_WARP)
k /= 2;
k = (int) course + (j < 0 ? -1 : 1) *
min(abs(j), k);
course = (float) rectify(k);
}
/*
* acceleration
*/
tmpf = newwarp - warp;
if (tmpf < 0.0)
d0 = (double) (tmpf * -1.0);
else
d0 = (double) tmpf;
if (tmpf != 0.0)
warp += (tmpf < 0 ? -1 : 1) * sqrt(d0)
* segment;
d0 = (double) toradians(course);
x += (int) (warp * cos(d0) * Mpersegment);
y += (int) (warp * sin(d0) * Mpersegment);
if ((warp > -0.1) && (warp < 0.1)){
warp = 0.0;
}
/*
* reset all the vars
*/
if (sp) {
sp->x = x;
sp->y = y;
sp->warp = warp;
sp->newwarp = newwarp;
sp->course = course % 360;
sp->newcourse = newcourse % 360;
sp->energy = energy;
sp->target = target;
} else {
tp->x = x;
tp->y = y;
tp->speed = warp;
tp->course = course % 360;
tp->target = target;
}
}
}
for (i=0; i <= shipnum; i++) { /* Check targets */
sp = shiplist[i];
if (sp->status & S_DEAD)
continue;
for (j=0; j<4; j++) {
target = sp->phasers[j].target;
if (target && (target->status & S_DEAD)) {
if ((sp == fed) && (!shutup[PHASERS+j])&& !(sp->status & S_DEAD))
printf(" phaser %d disengaging\n",j+1);
sp->phasers[j].target = NULL;
shutup[PHASERS+j]++;
}
}
for (j=0; j<6; j++) {
target = sp->tubes[j].target;
if (target && (target->status & S_DEAD)) {
if ((sp == fed) && (!shutup[TUBES+j]) && !(sp->status & S_DEAD))
printf(" tube %d disengaging\n", j+1);
sp->tubes[j].target = NULL;
shutup[TUBES+j]++;
}
}
}
/*
* self-destruct warning
*/
if ((fed->delay < 1000) && (fed->delay > 8)) {
printf("Computer: %d seconds to self destruct.\n",fed->delay/9);
}
/*
* Ruses, bluffs, surrenders
*/
if (defenseless)
defenseless++;
if (corbomite)
corbomite++;
if (surrender)
surrender++;
if (surrenderp)
surrenderp++;
/*
* Federation dispostion
*/
sp = fed;
kills = others = fedstatus = 0;
if ((sp->crew <= 0) || (sp->status & S_DEAD)) {
fedstatus = 1;
sp->status |= S_DEAD;
} else
for (j=0; j<1; j++) {
for (i=0; i<4; i++)
if (~sp->phasers[i].status | ~P_DAMAGED)
break;
if (i != 4)
continue;
for (i=0; i<6; i++)
if (~sp->tubes[i].status | ~T_DAMAGED)
break;
if (i != 6)
continue;
fedstatus = 1;
}
/*
* enemy disposition
*/
for (k=1; k <= shipnum; k++) {
ep = shiplist[k];
if (ep->status & S_DEAD) {
kills++;
continue;
}
if (ep->crew <= 0) {
ep->status |= S_DEAD;
kills++;
continue;
}
if (fedstatus)
continue;
j = rangefind(sp->x, ep->x, sp->y, ep->y);
if ((j>3500 && (ep->status & S_WARP)) ||
(j>4500 && ep->delay<100)) {
others++;
continue;
}
/* Check if we are within range to turn off the flag */
if ((j <= 3500) && (reengaged))
reengaged = 0;
if (ep->energy > 10)
continue;
for (i=0; i<4; i++)
if (~ep->phasers[i].status | ~P_DAMAGED)
break;
if (i != 4)
continue;
for (i=0; i<6; i++)
if (~ep->tubes[i].status | ~T_DAMAGED)
break;
if (i != 6)
continue;
kills++;
}
if (fedstatus == 0 && (global & E_SURRENDER)) {
if (leftovers())
warn(4);
else {
final(4);
}
}
if ((fed->status & S_SURRENDER) && (kills + others < shipnum)) {
if (leftovers())
warn(3);
else {
final(3);
}
}
if (fedstatus == 0 && kills+others < shipnum)
return 0;
if (fedstatus == 1 && kills+others < shipnum) {
if (leftovers())
warn(0);
else
final(0);
}
if (fedstatus == 0 && kills == shipnum) {
if (leftovers())
warn(1);
else
final(1);
}
if (fedstatus == 0 && kills+others == shipnum) {
if (leftovers())
warn(2);
else
final(2);
}
if (fedstatus == 1 && kills == shipnum) {
final(5);
}
return 0;
}