#!/usr/bin/env python
import math,sys,commands

if len(sys.argv) == 4:
    try:
        x = int(sys.argv[1])
        y = int(sys.argv[2])
        img = sys.argv[3]
    except:
        sys.exit("error: x, y must be digits!")
else:   
    sys.exit("usage: "+sys.argv[0]+" x y image")

foo = commands.getoutput("identify " + img + "|awk \'{print $3}\'")

width = foo.split('x')[0]
height= foo.split('x')[1]

h_winkel=360
v_winkel = (float(height)*float(360))/float(width)

ath = (float(x) / float(width) - float(0.5)) * float(h_winkel)
atv = (float(y) / float(height) - float(0.5)) * float(v_winkel)

print "atv "+str(atv)
print "ath "+str(ath)