def get_fir_crossing(latlon1,latlon2):
"""
Returns tuple of:
* airspace-dict
* latlon of crossing
"""
px1,py1=mapper.latlon2merc(latlon1,13)
px2,py2=mapper.latlon2merc(latlon2,13)
bb0=BoundingBox(min(px1,px2),min(py1,py2),max(px1,px2),max(py1,py2))
line=Line(Vertex(int(px1),int(py1)),Vertex(int(px2),int(py2)))
for poly,space in cache.get_firs_in_bb(bb0):
a=poly.is_inside(Vertex(int(px1),int(py1)))
b=poly.is_inside(Vertex(int(px2),int(py2)))
print "Considering space %s, starting: %s, ending: %s"%(
space['name'],a,b)
if b and not a:
cross=list(poly.first_entrance(line))
if cross:
outlatlon=(cross[0].get_x(),cross[0].get_y())
return space,mapper.merc2latlon(outlatlon,13)
return None
def get_firs(latlon):
px1,py1=mapper.latlon2merc(latlon,13)
bb0=BoundingBox(px1,py1,px1,py1)
for poly,space in cache.get_firs_in_bb(bb0):
if poly.is_inside(Vertex(int(px1),int(py1))):
yield space