import pfpy

def pfNodeName():
	return 'Animate camera'

def main():
	# fetch the first camera
	# Note: if no camera is available, an error will occur. In
	# this case, create one using Camera.new(0, 'myCamera') and
	# make sure parameters such as pixel aspect, film back
	# and frame rectangle are all set
	c= pfpy.getCameraRef(0)

	# set focal to variable and known
	c.setFocalType('variable')
	c.setFocalStatus('known')

	# fetch the in and out points
	inp= c.getInPoint()
	outp= c.getOutPoint()

	# display camera info
	print (c.getName(), "in: ", inp, "out: ", outp)
	print ("pixel aspect: ", c.getPixelAspect())
	print ("sensor size: ", c.getFilmBackWidth('mm'), c.getFilmBackHeight('mm'))
	print ("focal status: ", c.getFocalType(), c.getFocalStatus())
	print ("frame: ", c.getFrameRectangle())

	# remove all previous keyframes
	c.removeKeys()

	f= inp
	while (f <= outp) :

		# specify camera position
		c.setFocalLength(f, 5+f*0.05, 'mm')
		c.setTranslation(f, 5.0-f*0.05, 6.0, -4.0+f*0.02)
		c.setLookAt(f, 0.0, 2.0, 0.0, 0.0)
		
		f += 1