#!/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()