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sharpshooter.r
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1990-04-16
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2KB
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103 lines
Dark Unicorn
Damascene Ind.
/* SHARPSHOOTER
Copyright (C) 1988 Dark Unicorn Publishing
A Product of Damascene Industries
TIGER without movement. SHARPSHOOTER is designed to lock onto and destroy
any robot it sees. */
int angle,range;
main()
{
move (500,500);
while (1)
search();
}
/* Search: SHARPSHOOTER uses a fast scan to detect targets, then guns it down
with auto-tracking. */
search()
{
if (range = scan(angle += 130,10))
while (range = scan(angle = track(angle,10),10))
cannon(angle,range * 9 / 10);
}
/* Track: pinpoints the enemy. */
track(d,r)
int d,r;
{
if (r > 0)
{
if (scan(d-r,r) > 0)
return(track(d-r,r/2));
else
if (scan(d+r,r) > 0)
return(track(d+r,r/2));
else
return(track(d,r/2));
}
else
return(d);
}
/* Move: go to a specific location. Shoot anything seen in SHARPSHOOTER's
path. */
move (dest_x, dest_y)
int dest_x, dest_y;
{
int course,range;
course = plot_course(dest_x,dest_y);
while (distance(loc_x(),loc_y(),dest_x,dest_y) > 50)
{
drive (course,100);
if (range = scan(course,10))
cannon(course,range);
}
drive(course,0);
}
/* Distance: calculates distance between two points. */
distance(x1,y1,x2,y2)
int x1,y1,x2,y2;
{
return(sqrt(((x1 - x2) * (x1 - x2)) + ((y1 - y2) * (y1 - y2))));
}
/* Plot Course: calculates the degree heading of a location. */
plot_course(xx,yy)
int xx, yy;
{
int d,
x,y;
x = loc_x() - xx;
y = loc_y() - yy;
if (x == 0) {
if (y > 0)
d = 90;
else
d = 270;
}
else {
d = atan((100000 * y) / x);
if (x >= 0)
d += 180;
else if ((y > 0) && (x < 0))
d += 360;
}
return (d % 360);
}