externals.py

## \example externals.py
# Show how to create an RMF file that has references to external files.
# And how to read it back, sort of.
import RMF
import os.path
import sys

input_pdb = os.path.join(os.path.split(sys.argv[0])[0], "simple.pdb")
rmf_name = RMF._get_temporary_file_path("externals.rmf")
output_pdb = RMF._get_temporary_file_path("simple.pdb")
print("file name is", rmf_name)

rmf = RMF.create_rmf_file(rmf_name)
rmf.add_frame("root", RMF.FRAME)

# copy simple.pdb to output dir
open(output_pdb, "w").write(open(input_pdb, "r").read())
pdb_relpath = "./simple.pdb"

rpf = RMF.ReferenceFrameFactory(rmf)
ef = RMF.ExternalFactory(rmf)
# add a couple transformed copies of simple
c0 = rmf.get_root_node().add_child("copy0", RMF.REPRESENTATION)
rb0 = rpf.get(c0)
rb0.set_translation(RMF.Vector3(0, 0, 0))
rb0.set_rotation(RMF.Vector4(1, 0, 0, 0))
external = c0.add_child("simple.pdb", RMF.REPRESENTATION)
ed = ef.get(external)
ed.set_path(pdb_relpath)

# add another, reusing the same reference node
c1 = rmf.get_root_node().add_child("copy1", RMF.REPRESENTATION)
rb1 = rpf.get(c1)
rb1.set_translation(RMF.Vector3(20, 0, 0))
rb1.set_rotation(RMF.Vector4(.5, .5, .5, .5))
c1.add_child(external)