#!/usr/bin/env python
import aa, ROOT

"""
 This example shows how to write a km3net-dataformat (aka aanet) file
 from scratch (e.g. when you want to make a coverter to read some
 other file format)

"""

f = ROOT.EventFile()
f.set_output("myfile.aa.root")

for i in range ( 100 ) : # write 100 events

	f.evt.clear()        # important: the EventFile has only one Evt object : reset it


	f.evt.id = i
	f.evt.mc_run_id = i

	# now we fill the event

	trk1 = ROOT.Trk()
	trk1.id = 1
	trk1.pos.set(100,200,0)
	trk1.dir.set(0,0,1.0)
	trk1.t = 100;
	trk1.type = 14      # please use PDG type there
	trk1.mother_id = 0  # refers to the trk.id of the mother
	# etc

	f.evt.trks.push_back( trk1 ) 

	# do the same for other tracks if you have them

	print(f.evt)

	# when all done filling the Evt:

	f.write()

del f # needed unfortunately