SeapiPy

A Surface evolver API for python

Documentation:

https://seapipy.readthedocs.io/

Installation

Usage

To create a simple tissue 10x10 tissue, you can create a lattice object and initialize the vertices, edges and cells of the system. Then, you might create values for the cell volumes directly. You could also create normally distributed tensions for the edges.

import seapipy as sep
lattice = sep.lattice_class.Lattice(10, 10)
vertices, edges, cells = lattice.create_example_lattice()
volume_values = {k: 500 for k, v in cells.items()}
initial_edges_tensions = lattice.get_normally_distributed_densities(edges)

Then, you could create the Surface Evolver object using this variables and then initialize the Surface Evolver slate where all the functions will be written into, before saving to disk

se_object = sep.surface_evolver.SurfaceEvolver(vertices, 
                                               edges, 
                                               cells,
                                               initial_edges_tensions, 
                                               volume_values, 
                                               polygonal=False)
se_file = se_object.generate_fe_file()

The polygonal=False allows curved edges to exist in the tissue. Now, various Surface Evolver functions might be added to the file buffer in the se_file variable. For example we could add an initial relaxing for the tissue with

se_object.initial_relaxing()

Afterwards, we could add a saving function to create a checkpoint in the Surface Evolver simulation using

se_object.save_one_step("path/to/saving/checkpoint", "step_")

Which would save the state of the Surface Evolver simulation at "path/to/saving/chekcpoint" with name "step_" followed by the number of times it has been saved. Finally you could save the whole Surface Evolver slate into the disk and run it using

se_object.save_fe_file("SurfaceEvolverFile")
sep.command.run_evolver("path/to/SurfaceEvolverFile", "path/to/SurfaceEvolverExecutable")

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