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Shareware Grab Bag
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crobots.arc
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ROOK.R
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1985-12-13
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1KB
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84 lines
/* rook.r - scans the battlefield like a rook, i.e., only 0,90,180,270 */
/* move horizontally only, but looks horz and vertically */
int course;
int boundary;
int d;
main()
{
int y;
/* move to center of board */
if (loc_y() < 500) {
drive(90,70); /* start moving */
while (loc_y() - 500 < 20 && speed() > 0) /* stop near center */
;
} else {
drive(270,70); /* start moving */
while (loc_y() - 500 > 20 && speed() > 0) /* stop near center */
;
}
drive(y,0);
/* initialize starting parameters */
d = damage();
course = 0;
boundary = 995;
drive(course,30);
/* main loop */
while(1) {
/* look all directions */
look(0);
look(90);
look(180);
look(270);
/* if near end of battlefield, change directions */
if (course == 0) {
if (loc_x() > boundary || speed() == 0)
change();
}
else {
if (loc_x() < boundary || speed() == 0)
change();
}
}
}
/* look somewhere, and fire cannon repeatedly at in-range target */
look(deg)
int deg;
{
int range;
while ((range=scan(deg,2)) > 0 && range <= 700) {
drive(course,0);
cannon(deg,range);
if (d+20 != damage()) {
d = damage();
change();
}
}
}
change() {
if (course == 0) {
boundary = 5;
course = 180;
} else {
boundary = 995;
course = 0;
}
drive(course,30);
}
/* end of rook.r */