def cart3d_to_tecplot(cart3d_filename,
tecplot_filename,
log=None,
debug=False):
"""
Converts Cart3d to Tecplot
"""
if isinstance(cart3d_filename, Cart3D):
model = cart3d_filename
else:
model = read_cart3d(cart3d_filename, log=log, debug=debug)
tecplot = Tecplot()
tecplot.log = model.log
zone = Zone(model.log)
zone.headers_dict['VARIABLES'] = ['X', 'Y', 'Z']
zone.xyz = model.points
zone.tri_elements = model.elements + 1
tecplot.zones = [zone]
tecplot.write_tecplot(tecplot_filename, adjust_nids=False)
return tecplot
nid_map = {}
for inid, (nid, node) in enumerate(sorted(bdf_model.nodes.items())):
xyz.append(node.get_position())
nid_map[nid] = inid
for eid, elem in sorted(bdf_model.elements.items()):
tris.append([nid_map[nid] for nid in elem.node_ids])
tecplot_model = Tecplot(log=bdf_model.log, debug=bdf_model.debug)
zone = Zone(bdf_model.log)
zone.xyz = np.array(xyz, dtype='float64')
zone.tri_elements = tris = np.array(tris, dtype='int32') + 1
tecplot_model.title = ('%s; %s' % (case.title, case.subtitle)).strip(' ;')
zone.headers_dict['VARIABLES'] = variables
zone.variables = variables
tecplot_model.zones = [zone]
return tecplot_model
def nastran_tables_to_tecplot_filenames(
tecplot_filename_base: str,
bdf_model: BDF,
case,
variables: Optional[List[str]] = None,
ivars: Optional[List[int]] = None) -> None:
if variables is None:
variables = case.headers
if ivars is None:
ivars = np.arange(0, len(variables))
tecplot_model = nastran_table_to_tecplot(bdf_model, case, variables)
def nastran_to_tecplot(model):
"""assumes sequential nodes"""
tecplot = Tecplot(log=model.log)
nnodes = len(model.nodes)
inode_max = max(model.nodes)
if nnodes == inode_max:
xyz = np.zeros((nnodes, 3), dtype='float64')
i = 0
for unused_nid, node in sorted(model.nodes.items()):
xyz[i, :] = node.get_position()
i += 1
else:
msg = 'sequential node IDs required; nnodes=%s inode_max=%s' % (
nnodes, inode_max)
raise RuntimeError(msg)
zone = Zone(model.log)
zone.headers_dict['VARIABLES'] = ['X', 'Y', 'Z']
zone.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 = np.zeros(nelements, dtype='int32')
#mids = np.zeros(nelements, dtype='int32')
unhandled_types = set()
for unused_eid, element in model.elements.items():
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.nodal_results = vstack([pids, mids])#.T
#print(tecplot.nodal_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:
zone.tri_elements = np.array(tris, dtype='int32')
elif nquads and not nnot_quads and not nsolids:
zone.quad_elements = np.array(quads, dtype='int32')
elif ntets and not nnot_tets and not nshells:
zone.tet_elements = np.array(tets, dtype='int32')
elif nhexas and not nnot_hexas and not nshells:
zone.hexa_elements = np.array(hexas, dtype='int32')
elif not nshells:
elements = np.zeros((nelements, 8), dtype='int32')
if ntets:
tets = np.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 = np.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 = np.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]
zone.hexa_elements = np.array(elements)
elif not nsolids:
elements = np.zeros((nelements, 4), dtype='int32')
tris = np.array(tris, dtype='int32')
elements[:ntris, :3] = tris
elements[:ntris, 4] = elements[:ntets, 3]
quads = np.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)
tecplot.zones = [zone]
return tecplot
def nastran_to_tecplot_filename(bdf_filename, tecplot_filename, log=None, debug=False):
"""converts a BDF file to Tecplot format; supports solid elements"""
model = BDF(log=log, debug=debug)
model.read_bdf(bdf_filename)
# tecplot = nastran_to_tecplot(model)
#log.info('card_count = %s' % model.card_count)
nnodes = len(model.nodes)
nodes = np.zeros((nnodes, 3), dtype='float64')
elements = []
i = 0
nodeid_to_i_map = {}
for node_id, node in sorted(model.nodes.items()):
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 unused_eid, element in sorted(model.elements.items()):
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:
model.log.info('skip etype=%r' % element.type)
model.log.info(element)
elements = np.array(elements, dtype='int32')
tecplot = Tecplot(log=model.log)
zone = Zone(model.log)
zone.headers_dict['VARIABLES'] = ['X', 'Y', 'Z']
zone.xyz = nodes
zone.hexa_elements = elements
zone.nodal_results = np.array([], dtype='float32')
tecplot.zones = [zone]
tecplot.write_tecplot(tecplot_filename)
return tecplot
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
