Source code for sfepy.scripts.cylindergen

#!/usr/bin/env python
"""
Cylinder mesh generator.
"""
import sys
sys.path.append('.')
from argparse import ArgumentParser
import os.path as op

import numpy as nm

from sfepy.base.base import output
from sfepy.mesh.mesh_generators import gen_cylinder_mesh
from sfepy.discrete.fem.meshio import check_format_suffix, MeshIO

helps = {
    'filename' :
    'output file name [default: %(default)s]',
    'format' : 'output mesh format (overrides output file name extension)',
    'axis' :
    'axis of the cylinder, one of x, y, z [default: %(default)s]',
    'dims' :
    'dimensions of the cylinder: inner surface semi-axes a1, b1, outer'
    ' surface semi-axes a2, b2, length. If the length is 0, a planar annular'
    ' mesh topology is generated embedded in 3D space or, with --2d option,'
    ' in 2D space, forcing all z coordinates to be zero [default: %(default)s]',
    'shape' :
    'shape (counts of nodes in radial, circumferential and longitudinal'\
    ' directions) of the cylinder mesh [default: %(default)s]',
    'centre' :
    'centre of the cylinder [default: %(default)s]',
    'force_hollow' :
    'force hollow mesh even if inner radii a1 = b1 = 0',
    'is_open' :
    'generate an open cylinder segment',
    'open_angle' :
    'opening angle in radians [default: %(default)s]',
    'non_uniform' :
    'space the mesh nodes in radial direction so that the element'\
    ' volumes are (approximately) the same, making thus the elements towards'\
    ' the outer surface thinner',
    '2d' :
    'set axis to z, length and all z coordinates to zero and generate'
    ' an annular mesh in 2D space',
}

[docs]def gen_cylinder(options): dims = nm.array(eval(options.dims), dtype=nm.float64) shape = nm.array(eval(options.shape), dtype=nm.int32) centre = nm.array(eval(options.centre), dtype=nm.float64) output.prefix = 'cylindergen:' output('dimensions:', dims) output('shape:', shape) output('centre:', centre) output('output file:', options.output_filename) check_format_suffix(options.format, op.splitext(options.output_filename)[1][1:]) mesh = gen_cylinder_mesh(dims, shape, centre, axis=options.axis, force_hollow=options.force_hollow, is_open=options.is_open, open_angle=options.open_angle, non_uniform=options.non_uniform, make_2d=options.is_2d, name=options.output_filename) io = MeshIO.any_from_filename(options.output_filename, file_format=options.format, mode='w') mesh.write(options.output_filename, io=io)
[docs]def add_args(parser): parser.add_argument('-o', metavar = 'filename', action = "store", dest = "output_filename", default = 'out.vtk', help = helps['filename']) parser.add_argument('-f', '--format', metavar='format', action='store', type=str, dest='format', default=None, help=helps['format']) parser.add_argument("-a", "--axis", metavar = 'axis', action = "store", dest = "axis", default = 'x', help = helps['axis']) parser.add_argument("-d", "--dims", metavar = 'dims', action = "store", dest = "dims", default = '[1.0, 1.0, 2.0, 2.0, 3.0]', help = helps['dims']) parser.add_argument("-s", "--shape", metavar = 'shape', action = "store", dest = "shape", default = '[11, 11, 11]', help = helps['shape']) parser.add_argument("-c", "--centre", metavar = 'centre', action = "store", dest = "centre", default = '[0.0, 0.0, 0.0]', help = helps['centre']) parser.add_argument("--force-hollow", action = "store_true", dest = "force_hollow", default = False, help = helps['force_hollow']) parser.add_argument("--is-open", action = "store_true", dest = "is_open", default = False, help = helps['is_open']) parser.add_argument("--open-angle", metavar = 'angle', type=float, action = "store", dest = "open_angle", default = '0.0', help = helps['open_angle']) parser.add_argument("--non-uniform", action = "store_true", dest = "non_uniform", default = False, help = helps['non_uniform']) parser.add_argument("-2", "--2d", action = "store_true", dest = "is_2d", default = False, help = helps['2d'])
[docs]def main(): parser = ArgumentParser(description=__doc__) parser.add_argument('--version', action='version', version = "%(prog)s") add_args(parser) options = parser.parse_args() gen_cylinder(options)
if __name__ == '__main__': main()