def display( B=None, A=None, G=None, D=None, F=None ):
"""Compute and display results.
Note that partial results are possible.
:param F: Aperture, ƒ/
:param G: Guide number in feet
:param A: Film speed, ISO
:param B: Beam Candle Power Seconds
:param D: Subject distance in feet
"""
results= elflash.flash( B=B, A=A, G=G, D=D, F=F )
results.D_m= METRE.from_std( FOOT.to_std( results.D ) )
if results.F is not None:
if abs(results.F-int(results.F)) > .01:
print( "Aperture ...................... ƒ/{F:<4.1f}".format(**results) )
else:
print( "Aperture ...................... ƒ/{F:<4.0f}".format(**results) )
if results.G is not None:
results.G_m= METRE.from_std( FOOT.to_std( results.G ) )
print( "Guide Number (metres) ......... {G_m:7.1f}".format(**results) )
print( "Guide Number (feet) ........... {G:7.1f}".format(**results) )
if results.A is not None:
print( "Film speed .................ISO {A:5.0f}".format(**results) )
if results.B is not None:
print( "Beam Candle Power Seconds ..... {B:5.0f}".format(**results) )
if results.D is not None:
print( "Subject distance (metres) ..... {D_m:7.1f}".format(**results) )
print( "Subject distance (feet) ....... {D:7.1f}".format(**results) )
if results.G is not None:
f_template_1= "Use ƒ/{F:.<4.1f}...........{D_m:5.1f} m. ({D_f:5.1f} ft.)"
f_template_0= "Use ƒ/{F:.<4.0f}...........{D_m:5.1f} m. ({D_f:5.1f} ft.)"
for F, D_f in elflash.aperture_iter( results.G ):
D_m = convert( D_f, FOOT, METRE )
if abs(F-int(F)) > .01:
print( f_template_1.format( D_m=D_m, D_f=D_f, F=F ) )
else:
print( f_template_0.format( D_m=D_m, D_f=D_f, F=F ) )
def __init__( self, unit=None ):
self.unit= unit if unit is not None else FOOT
self.space = unit.from_std( FOOT.to_std( 1 ) ) # Spacing.
self.r_1 = 16 # Feet
self.r_2 = 22 # Feet
