def to_descfile(self):
df = DescFile()
df.data = []
for i, f in enumerate(self.frames):
lines = [[i+self.first_frame]+p for p in f]
df.data += lines
self.headers['type'] = 'PointsFile v.1.0'
self.headers['width'] = str(self.width)
self.headers['height'] = str(self.height)
self.headers['uid'] = str(self.uid)
df.headers = OrderedDict(self.headers)
df.tags = ['f']+copy.copy(self.tags)
return df
