Source code for cylindergen

#!/usr/bin/env python
import sys
sys.path.append( '.' )
from optparse import OptionParser
from sfepy.mesh.mesh_generators import gen_cylinder_mesh
from sfepy.discrete.fem.meshio import MeshIO

usage = """%prog [options]

Cylinder mesh generator.
"""
help = {
    'filename' :
    'output file name [default: %default]',
    'format' : 'output mesh format (overrides output file name extension)',
    'axis' :
    'axis of the cylinder, one of x, y, z [default: %default]',
    'dims' :
    'dimensions of the cylinder: inner surface semi-axes a1, b1, outer'\
    ' surface semi-axes a2, b2, length [default: %default]',
    'shape' :
    'shape (counts of nodes in radial, circumferential and longitudinal'\
    ' directions) of the cylinder mesh [default: %default]',
    'centre' :
    'centre of the cylinder [default: %default]',
    '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]',
    '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',
}

[docs]def main(): parser = OptionParser( usage = usage, version = "%prog" ) parser.add_option( "-o", "", metavar = 'filename', action = "store", dest = "output_filename", default = 'out.vtk', help = help['filename'] ) parser.add_option('-f', '--format', metavar='format', action='store', type='string', dest='format', default=None, help=help['format']) parser.add_option( "-a", "--axis", metavar = 'axis', action = "store", dest = "axis", default = 'x', help = help['axis'] ) parser.add_option( "-d", "--dims", metavar = 'dims', action = "store", dest = "dims", default = '[1.0, 1.0, 2.0, 2.0, 3.0]', help = help['dims'] ) parser.add_option( "-s", "--shape", metavar = 'shape', action = "store", dest = "shape", default = '[11, 11, 11]', help = help['shape'] ) parser.add_option( "-c", "--centre", metavar = 'centre', action = "store", dest = "centre", default = '[0.0, 0.0, 0.0]', help = help['centre'] ) parser.add_option( "", "--force-hollow", action = "store_true", dest = "force_hollow", default = False, help = help['force_hollow'] ) parser.add_option( "", "--is-open", action = "store_true", dest = "is_open", default = False, help = help['is_open'] ) parser.add_option( "", "--open-angle", metavar = 'angle', type='float', action = "store", dest = "open_angle", default = '0.0', help = help['open_angle'] ) parser.add_option( "", "--non-uniform", action = "store_true", dest = "non_uniform", default = False, help = help['non_uniform'] ) (options, args) = parser.parse_args() import numpy as nm dims = eval( "nm.array( %s, dtype = nm.float64 )" % options.dims ) shape = eval( "nm.array( %s, dtype = nm.int32 )" % options.shape ) centre = eval( "nm.array( %s, dtype = nm.float64 )" % options.centre ) print dims print shape print centre 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, name=options.output_filename) io = MeshIO.for_format(options.output_filename, format=options.format, writable=True) mesh.write(options.output_filename, io=io)
if __name__ == '__main__': main()