import numpy as np
from pyNastran.converters.aflr.ugrid.ugrid_reader import UGRID, read_ugrid
from pyNastran.converters.tecplot.tecplot import Tecplot, Zone
[docs]def get_ugrid_model(ugrid_filename, log=None, debug=False):
"""helper method for loading UGRID models
Parameters
----------
ugrid_filename : varies
str : the input UGRID filename
UGRID : the UGRID object
Returns
-------
ugrid_model : UGRID()
the UGRID object
"""
if isinstance(ugrid_filename, str):
#assert os.path.exists(ugrid_filename), '%r doesnt exist' % ugrid_filename
model = read_ugrid(ugrid_filename=ugrid_filename,
encoding=None, log=log, debug=debug,
read_shells=True, read_solids=True, check=True)
#UGRID(log=log, debug=debug)
#model.read_ugrid(ugrid_filename)
else:
model = ugrid_filename
assert isinstance(model, UGRID), 'expected UGRID; type(model)=%s' % type(model)
return model
[docs]def ugrid3d_to_tecplot_filename(ugrid_filename, tecplot_filename,
log=None, debug=False):
"""
Converts a UGRID to a Tecplot ASCII file.
Parameters
----------
ugrid_filename : varies
str : the input UGRID filename
UGRID : the UGRID object
tecplot_filename : str
the output Tecplot filename
log : logger; default=None
a logger object
debug : bool; default=False
developer debug
Returns
-------
tecplot_model : Tecplot()
the Tecplot object
"""
ugrid_model = get_ugrid_model(ugrid_filename, log=log, debug=debug)
tecplot = write_tecplot(ugrid_model, tecplot_filename)
return tecplot
[docs]def write_tecplot(ugrid_model, tecplot_filename):
ugrid_model.check_hanging_nodes()
tecplot, zone = ugrid_to_tecplot(ugrid_model)
zone.nodal_results = np.array([], dtype='float32')
tecplot.write_tecplot(tecplot_filename, adjust_nids=True) # is adjust correct???
return tecplot
[docs]def ugrid_to_tecplot(ugrid_filename, tecplot_filename=None, log=None, debug=False):
"""
Converts a UGRID to a Tecplot ASCII file.
Parameters
----------
ugrid_filename : varies
str : the input UGRID filename
UGRID : the UGRID object
tecplot_filename : str
the output Tecplot filename
log : logger; default=None
a logger object
debug : bool; default=False
developer debug
Returns
-------
tecplot_model : Tecplot()
the Tecplot object
"""
ugrid_model = get_ugrid_model(ugrid_filename, log=log, debug=debug)
#nnodes = len(ugrid_model.nodes)
#nodes = zeros((nnodes, 3), dtype='float64')
ugrid_model.check_hanging_nodes()
elements = []
ntets = len(ugrid_model.tets)
non_tets = len(ugrid_model.penta5s) + len(ugrid_model.penta6s) + len(ugrid_model.hexas)
assert ntets + non_tets > 0, 'nsolids=%s' % (ntets + non_tets)
tecplot = Tecplot(log=ugrid_model.log, debug=debug)
zone = Zone(ugrid_model.log)
zone.headers_dict['VARIABLES'] = ['X', 'Y', 'Z']
zone.xyz = ugrid_model.nodes
if ntets and non_tets == 0:
elements = ugrid_model.tets
zone.tet_elements = elements - 1
elif non_tets:
for element in ugrid_model.tets:
n1, n2, n3, n4 = element
elements.append([n1, n2, n3, n4,
n4, n4, n4, n4])
for element in ugrid_model.penta5s:
n1, n2, n3, n4, n5 = element
elements.append([n1, n2, n3, n4,
n5, n5, n5, n5])
for element in ugrid_model.penta6s:
n1, n2, n3, n4, n5, n6 = element
elements.append([n1, n2, n3, n4,
n5, n6, n6, n6])
for element in ugrid_model.hexas:
n1, n2, n3, n4, n5, n6, n7, n8 = element
elements.append([n1, n2, n3, n4,
n5, n6, n7, n8])
elements = np.array(elements, dtype='int32') - 1
zone.hexa_elements = elements
else:
raise RuntimeError()
if tecplot_filename is not None:
tecplot.write_tecplot(tecplot_filename)
tecplot.zones = [zone]
return tecplot, zone
[docs]def main(): # pragma: no cover
import sys
if len(sys.argv) != 3:
msg = ('number of arguments must be 2; ugrid_filename, tecplot_filename;'
' nargs=%s; args=%s' % (
len(sys.argv[1:]), sys.argv[1:]))
raise RuntimeError(msg)
ugrid_filename = sys.argv[1]
tecplot_filename = sys.argv[2]
ugrid3d_to_tecplot_filename(ugrid_filename, tecplot_filename)
if __name__ == '__main__': # pragma: no cover
main()