[template] OVITO python modifier

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OVITO 2.6.0 allows users to program their own modifier in Python. Here provides a template including the common headers and a for-loop for per-particle assignment.

# Import OVITO modules.

from ovito.io import *
from ovito.modifiers import *
from ovito.data import *

# Import system and NumPy libraries
import sys
import numpy

# Define your own modifier
def modify(frame, input, output):

print("The input contains %i particles." % input.number_of_particles)

# Loop over particles and print their number of bonds.
for particle_index in range(output.number_of_particles):
    # Print particle index (1-based).
    sys.stdout.write("%i " % (particle_index+1))
    value1 = <your calculations>
    output.particle_proporties.['<key>'].marray[particle_index] = value1
    # End of particle line

Chris F. Author of this blog, M.Phil.
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