def nastran_to_tecplot_filename(bdf_filename, tecplot_filename, log=None):
model = BDF(log=log)
model.read_bdf(bdf_filename)
# tecplot = nastran_to_tecplot(model)
#log.info('card_count = %s' % model.card_count)
nnodes = len(model.nodes)
nodes = zeros((nnodes, 3), dtype='float64')
elements = []
i = 0
nodeid_to_i_map = {}
for node_id, node in sorted(iteritems(model.nodes)):
xyz = node.get_position()
nodes[i, :] = xyz
nodeid_to_i_map[node_id] = i
i += 1
assert len(model.nodes) == i, 'model.nodes=%s i=%s' % (len(model.nodes), i)
for eid, element in sorted(iteritems(model.elements)):
if element.type in ['CTETRA']:
n1, n2, n3, n4 = element.node_ids
i1, i2, i3, i4 = nodeid_to_i_map[n1], nodeid_to_i_map[
n2], nodeid_to_i_map[n3], nodeid_to_i_map[n4]
elements.append([i1, i2, i3, i4, i4, i4, i4, i4])
elif element.type in ['CPENTA']:
n1, n2, n3, n4, n5, n6 = element.node_ids
i1, i2, i3, i4, i5, i6 = (nodeid_to_i_map[n1], nodeid_to_i_map[n2],
nodeid_to_i_map[n3], nodeid_to_i_map[n4],
nodeid_to_i_map[n5], nodeid_to_i_map[n6])
elements.append([i1, i2, i3, i4, i5, i6, i6, i6])
elif element.type in ['CPYRAM']:
n1, n2, n3, n4, n5 = element.node_ids
i1, i2, i3, i4, i5 = (nodeid_to_i_map[n1], nodeid_to_i_map[n2],
nodeid_to_i_map[n3], nodeid_to_i_map[n4],
nodeid_to_i_map[n5])
elements.append([i1, i2, i3, i4, i5, i5, i5, i5])
elif element.type in ['CHEXA']:
n1, n2, n3, n4, n5, n6, n7, n8 = element.node_ids
i1, i2, i3, i4, i5, i6, i7, i8 = (nodeid_to_i_map[n1],
nodeid_to_i_map[n2],
nodeid_to_i_map[n3],
nodeid_to_i_map[n4],
nodeid_to_i_map[n5],
nodeid_to_i_map[n6],
nodeid_to_i_map[n7],
nodeid_to_i_map[n8])
elements.append([i1, i2, i3, i4, i5, i6, i7, i8])
else:
self.log.info('skip etype=%r' % element.type)
self.log.info(element)
elements = array(elements, dtype='int32')
tecplot = Tecplot()
tecplot.xyz = nodes
tecplot.hexa_elements = elements
tecplot.write_tecplot(tecplot_filename)
tecplot.results = array([], dtype='float32')
return tecplot
def nastran_to_tecplot_filename(bdf_filename, tecplot_filename, log=None):
model = BDF(log=log)
model.read_bdf(bdf_filename)
# tecplot = nastran_to_tecplot(model)
#log.info('card_count = %s' % model.card_count)
nnodes = len(model.nodes)
nodes = zeros((nnodes, 3), dtype='float64')
elements = []
i = 0
nodeid_to_i_map = {}
for node_id, node in sorted(iteritems(model.nodes)):
xyz = node.get_position()
nodes[i, :] = xyz
nodeid_to_i_map[node_id] = i
i += 1
assert len(model.nodes) == i, 'model.nodes=%s i=%s' % (len(model.nodes), i)
for eid, element in sorted(iteritems(model.elements)):
if element.type in ['CTETRA']:
n1, n2, n3, n4 = element.node_ids
i1, i2, i3, i4 = nodeid_to_i_map[n1], nodeid_to_i_map[n2], nodeid_to_i_map[n3], nodeid_to_i_map[n4]
elements.append([i1, i2, i3, i4,
i4, i4, i4, i4])
elif element.type in ['CPENTA']:
n1, n2, n3, n4, n5, n6 = element.node_ids
i1, i2, i3, i4, i5, i6 = (
nodeid_to_i_map[n1], nodeid_to_i_map[n2], nodeid_to_i_map[n3], nodeid_to_i_map[n4],
nodeid_to_i_map[n5], nodeid_to_i_map[n6])
elements.append([i1, i2, i3, i4,
i5, i6, i6, i6])
elif element.type in ['CPYRAM']:
n1, n2, n3, n4, n5 = element.node_ids
i1, i2, i3, i4, i5 = (
nodeid_to_i_map[n1], nodeid_to_i_map[n2], nodeid_to_i_map[n3], nodeid_to_i_map[n4],
nodeid_to_i_map[n5])
elements.append([i1, i2, i3, i4,
i5, i5, i5, i5])
elif element.type in ['CHEXA']:
n1, n2, n3, n4, n5, n6, n7, n8 = element.node_ids
i1, i2, i3, i4, i5, i6, i7, i8 = (
nodeid_to_i_map[n1], nodeid_to_i_map[n2], nodeid_to_i_map[n3], nodeid_to_i_map[n4],
nodeid_to_i_map[n5], nodeid_to_i_map[n6], nodeid_to_i_map[n7], nodeid_to_i_map[n8])
elements.append([i1, i2, i3, i4,
i5, i6, i7, i8])
else:
self.log.info('skip etype=%r' % element.type)
self.log.info(element)
elements = array(elements, dtype='int32')
tecplot = Tecplot()
tecplot.xyz = nodes
tecplot.hexa_elements = elements
tecplot.write_tecplot(tecplot_filename)
tecplot.results = array([], dtype='float32')
return tecplot
def ugrid_to_tecplot(ugrid_model, 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
"""
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=log, debug=debug)
tecplot.xyz = ugrid_model.nodes
if ntets and non_tets == 0:
elements = ugrid_model.tets
tecplot.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 = array(elements, dtype='int32') - 1
tecplot.hexa_elements = elements
else:
raise RuntimeError()
if tecplot_filename is not None:
tecplot.write_tecplot(tecplot_filename)
return tecplot
def merge_tecplot_files(tecplot_filenames,
tecplot_filename_out=None,
log=None):
"""merges one or more tecplot files"""
assert isinstance(tecplot_filenames,
(list, tuple)), type(tecplot_filenames)
assert len(tecplot_filenames) > 0, tecplot_filenames
xyz = []
tri_elements = []
quad_elements = []
tet_elements = []
hexa_elements = []
results = []
nnodes = 0
model = Tecplot(log=log)
if len(tecplot_filenames) == 1:
model.read_tecplot(tecplot_filenames[0])
if tecplot_filename_out is not None:
model.write_tecplot(tecplot_filename_out)
return model
for tecplot_filename in tecplot_filenames:
model.log.info('reading %s' % tecplot_filename)
model.read_tecplot(tecplot_filename)
xyz.append(model.xyz)
if len(model.tri_elements):
tri_elements.append(model.tri_elements + nnodes)
if len(model.quad_elements):
quad_elements.append(model.quad_elements + nnodes)
if len(model.tet_elements):
tet_elements.append(model.tet_elements + nnodes)
if len(model.hexa_elements):
hexa_elements.append(model.hexa_elements + nnodes)
results.append(model.results)
nnodes += model.nnodes
model.xyz = vstack(xyz)
if tri_elements:
model.tri_elements = vstack(tri_elements)
if quad_elements:
model.quad_elements = vstack(quad_elements)
if tet_elements:
model.tet_elements = vstack(tet_elements)
if hexa_elements:
model.hexa_elements = vstack(hexa_elements)
model.results = vstack(results)
if tecplot_filename_out is not None:
model.write_tecplot(tecplot_filename_out)
return model
def merge_tecplot_files(tecplot_filenames, tecplot_filename_out=None, log=None):
assert isinstance(tecplot_filenames, (list, tuple)), type(tecplot_filenames)
assert len(tecplot_filenames) > 0, tecplot_filenames
xyz = []
tri_elements = []
quad_elements = []
tet_elements = []
hexa_elements = []
results = []
nnodes = 0
model = Tecplot(log=log)
if len(tecplot_filenames) == 1:
model.read_tecplot(tecplot_filenames[0])
if tecplot_filename_out is not None:
model.write_tecplot(tecplot_filename_out)
return model
for tecplot_filename in tecplot_filenames:
model.log.info('reading %s' % tecplot_filename)
model.read_tecplot(tecplot_filename)
xyz.append(model.xyz)
if len(model.tri_elements):
tri_elements.append(model.tri_elements + nnodes)
if len(model.quad_elements):
quad_elements.append(model.quad_elements + nnodes)
if len(model.tet_elements):
tet_elements.append(model.tet_elements + nnodes)
if len(model.hexa_elements):
hexa_elements.append(model.hexa_elements + nnodes)
results.append(model.results)
nnodes += model.nnodes
model.xyz = vstack(xyz)
if tri_elements:
model.tri_elements = vstack(tri_elements)
if quad_elements:
model.quad_elements = vstack(quad_elements)
if tet_elements:
model.tet_elements = vstack(tet_elements)
if hexa_elements:
model.hexa_elements = vstack(hexa_elements)
model.results = vstack(results)
if tecplot_filename_out is not None:
model.write_tecplot(tecplot_filename_out)
return model
def ugrid_to_tecplot(ugrid_model):
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()
tecplot.xyz = ugrid_model.nodes
if ntets and non_tets == 0:
elements = ugrid_model.tets
tecplot.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 = array(elements, dtype='int32') - 1
tecplot.hexa_elements = elements
else:
raise RuntimeError()
return tecplot
def nastran_to_tecplot(model):
"""assumes sequential nodes"""
tecplot = Tecplot()
nnodes = len(model.nodes)
inode_max = max(model.nodes)
if nnodes == inode_max:
xyz = zeros((nnodes, 3), dtype='float64')
i = 0
for nid, node in sorted(iteritems(model.nodes)):
xyz[i, :] = node.get_position()
i += 1
else:
raise RuntimeError('sequential node IDs required; nnodes=%s inode_max=%s' % (nnodes, inode_max))
tecplot.xyz = xyz
nquads = model.card_count['CQUAD4'] if 'CQUAD4' in model.card_count else 0
ntets = model.card_count['CTETRA'] if 'CTETRA' in model.card_count else 0
#ntrias = model.card_count['CTRIA3'] if 'CTRIA3' in model.card_count else 0
nhexas = model.card_count['CHEXA'] if 'CHEXA' in model.card_count else 0
nelements = len(model.elements)
tris = []
quads = []
tets = []
hexas = []
pentas = []
#i = 0
#pids = zeros(nelements, dtype='int32')
#mids = zeros(nelements, dtype='int32')
unhandled_types = set([])
for eid, element in iteritems(model.elements):
if element.type in ['CTRIA3']:
tris.append(element.node_ids)
elif element.type in ['CQUAD4']:
quads.append(element.node_ids)
elif element.type == 'CTETRA':
tets.append(element.node_ids[:4])
elif element.type == 'CPENTA':
pentas.append(element.node_ids[:6])
elif element.type == 'CHEXA':
hexas.append(element.node_ids[:8])
else:
unhandled_types.add(element.type)
#pid = element.Pid()
#mid = element.Mid()
#pids[i] = pid
#mids[i] = mid
#i += 1
for etype in unhandled_types:
print('ignoring %s' % etype)
# only supports nodal results
#tecplot.results = vstack([pids, mids])#.T
#print(tecplot.results.shape)
#tecplot.result_names = ['PropertyID', 'MaterialID']
ntris = len(tris)
nquads = len(quads)
nshells = ntris + nquads
ntets = len(tets)
npentas = len(pentas)
nhexas = len(hexas)
nsolids = ntets + npentas + nhexas
nnot_tris = nquads
nnot_quads = ntris
nnot_tets = npentas + nhexas
nnot_hexas = ntets + npentas
if ntris and not nnot_tris and not nsolids:
tecplot.tri_elements = array(tris, dtype='int32')
elif nquads and not nnot_quads and not nsolids:
tecplot.quad_elements = array(quads, dtype='int32')
elif ntets and not nnot_tets and not nshells:
tecplot.tet_elements = array(tets, dtype='int32')
elif nhexas and not nnot_hexas and not nshells:
tecplot.hexa_elements = array(hexas, dtype='int32')
elif not nshells:
elements = zeros((nelements, 8), dtype='int32')
if ntets:
tets = array(tets, dtype='int32')
elements[:ntets, :4] = tets
elements[:ntets, 4] = elements[:ntets, 3]
elements[:ntets, 5] = elements[:ntets, 3]
elements[:ntets, 6] = elements[:ntets, 3]
elements[:ntets, 7] = elements[:ntets, 3]
if npentas:
# penta6
pentas = array(pentas, dtype='int32')
elements[ntets:ntets + npentas, :6] = pentas
elements[ntets:ntets + npentas, 6] = elements[:ntets, 5]
elements[ntets:ntets + npentas, 7] = elements[:ntets, 5]
if nhexas:
hexas = array(hexas, dtype='int32')
elements[ntets + npentas:ntets + npentas + nhexas, :6] = pentas
elements[ntets + npentas:ntets + npentas + nhexas, 6] = elements[:ntets, 5]
elements[ntets + npentas:ntets + npentas + nhexas, 7] = elements[:ntets, 5]
tecplot.hexa_elements = array(elements)
elif not nsolids:
elements = zeros((nelements, 4), dtype='int32')
tris = array(tris, dtype='int32')
elements[:ntris, :3] = tris
elements[:ntris, 4] = elements[:ntets, 3]
quads = array(quads, dtype='int32')
elements[ntris:, :] = quads
else:
msg = 'Only solids or shells are allowed (not both)\n'
msg += ' nsolids=%s nshells=%s\n' % (nsolids, nshells)
msg += ' ntris=%s nquads=%s\n' % (ntris, nquads)
msg += ' ntets=%s npentas=%s nhexas=%s\n' % (ntets, npentas, nhexas)
raise NotImplementedError(msg)
return tecplot
def nastran_to_tecplot(model):
"""assumes sequential nodes"""
tecplot = Tecplot()
nnodes = len(model.nodes)
inode_max = max(model.nodes)
if nnodes == inode_max:
xyz = zeros((nnodes, 3), dtype='float64')
i = 0
for nid, node in sorted(iteritems(model.nodes)):
xyz[i, :] = node.get_position()
i += 1
else:
raise RuntimeError(
'sequential node IDs required; nnodes=%s inode_max=%s' %
(nnodes, inode_max))
tecplot.xyz = xyz
nquads = model.card_count['CQUAD4'] if 'CQUAD4' in model.card_count else 0
ntets = model.card_count['CTETRA'] if 'CTETRA' in model.card_count else 0
#ntrias = model.card_count['CTRIA3'] if 'CTRIA3' in model.card_count else 0
nhexas = model.card_count['CHEXA'] if 'CHEXA' in model.card_count else 0
nelements = len(model.elements)
tris = []
quads = []
tets = []
hexas = []
pentas = []
#i = 0
#pids = zeros(nelements, dtype='int32')
#mids = zeros(nelements, dtype='int32')
unhandled_types = set([])
for eid, element in iteritems(model.elements):
if element.type in ['CTRIA3']:
tris.append(element.node_ids)
elif element.type in ['CQUAD4']:
quads.append(element.node_ids)
elif element.type == 'CTETRA':
tets.append(element.node_ids[:4])
elif element.type == 'CPENTA':
pentas.append(element.node_ids[:6])
elif element.type == 'CHEXA':
hexas.append(element.node_ids[:8])
else:
unhandled_types.add(element.type)
#pid = element.Pid()
#mid = element.Mid()
#pids[i] = pid
#mids[i] = mid
#i += 1
for etype in unhandled_types:
print('ignoring %s' % etype)
# only supports nodal results
#tecplot.results = vstack([pids, mids])#.T
#print(tecplot.results.shape)
#tecplot.result_names = ['PropertyID', 'MaterialID']
ntris = len(tris)
nquads = len(quads)
nshells = ntris + nquads
ntets = len(tets)
npentas = len(pentas)
nhexas = len(hexas)
nsolids = ntets + npentas + nhexas
nnot_tris = nquads
nnot_quads = ntris
nnot_tets = npentas + nhexas
nnot_hexas = ntets + npentas
if ntris and not nnot_tris and not nsolids:
tecplot.tri_elements = array(tris, dtype='int32')
elif nquads and not nnot_quads and not nsolids:
tecplot.quad_elements = array(quads, dtype='int32')
elif ntets and not nnot_tets and not nshells:
tecplot.tet_elements = array(tets, dtype='int32')
elif nhexas and not nnot_hexas and not nshells:
tecplot.hexa_elements = array(hexas, dtype='int32')
elif not nshells:
elements = zeros((nelements, 8), dtype='int32')
if ntets:
tets = array(tets, dtype='int32')
elements[:ntets, :4] = tets
elements[:ntets, 4] = elements[:ntets, 3]
elements[:ntets, 5] = elements[:ntets, 3]
elements[:ntets, 6] = elements[:ntets, 3]
elements[:ntets, 7] = elements[:ntets, 3]
if npentas:
# penta6
pentas = array(pentas, dtype='int32')
elements[ntets:ntets + npentas, :6] = pentas
elements[ntets:ntets + npentas, 6] = elements[:ntets, 5]
elements[ntets:ntets + npentas, 7] = elements[:ntets, 5]
if nhexas:
hexas = array(hexas, dtype='int32')
elements[ntets + npentas:ntets + npentas + nhexas, :6] = pentas
elements[ntets + npentas:ntets + npentas + nhexas,
6] = elements[:ntets, 5]
elements[ntets + npentas:ntets + npentas + nhexas,
7] = elements[:ntets, 5]
tecplot.hexa_elements = array(elements)
elif not nsolids:
elements = zeros((nelements, 4), dtype='int32')
tris = array(tris, dtype='int32')
elements[:ntris, :3] = tris
elements[:ntris, 4] = elements[:ntets, 3]
quads = array(quads, dtype='int32')
elements[ntris:, :] = quads
else:
msg = 'Only solids or shells are allowed (not both)\n'
msg += ' nsolids=%s nshells=%s\n' % (nsolids, nshells)
msg += ' ntris=%s nquads=%s\n' % (ntris, nquads)
msg += ' ntets=%s npentas=%s nhexas=%s\n' % (ntets, npentas, nhexas)
raise NotImplementedError(msg)
return tecplot