def dtf_connect_points(points):
d = ""
total_distance = 0
last_dist = 0
for i,s in enumerate(points[:-1]):
e = points[i+1]
total_distance += distance(s, e)
if (total_distance - last_dist) > feet(40):
offset = e.offset_miles(1,0)
d += dtf.dtf_text(offset,
"T+%02d %.2f miles, %s, %dmph. tas" %
(int(e.tm/60), miles(total_distance),
alt_text(e.alt), int(e.tas)))
d += dtf.dtf_circle(e, feet(1))
last_dist = total_distance
m = midpoint(s,e)
a1,a2 = arrow(s,m)
d += dtf.dtf_line(m,a1)
d += dtf.dtf_line(m,a2)
d += dtf.dtf_line(a1,a2)
d += dtf.dtf_line(s,e)
return d
def draw_lines(t):
points = generate_grid(t)
s = ""
for (p1,p2) in points:
s += dtf.dtf_line(p1, p2)
return s