def write_op2_header(model: OP2, op2_file, fop2_ascii,
struct_3i: Struct,
post: int=-1, endian: bytes=b'<'):
"""writes the op2 header"""
is_nx = model.is_nx
is_msc = model.is_msc
#is_nasa95 = model.is_nasa95
is_optistruct = model.is_optistruct
if model.date == (1, 1, 2000): # (7, 24, 2020)
today = datetime.datetime.today()
model.date = (today.month, today.day, today.year)
if post == -1:
#_write_markers(op2_file, op2_ascii, [3, 0, 7])
op2_file.write(struct_3i.pack(*[4, 3, 4,]))
tape_code = b'NASTRAN FORT TAPE ID CODE - '
if is_nx:
op2_file.write(pack(endian + b'7i 28s i', *[4, 1, 4,
4, 7, 4,
28, tape_code, 28]))
nastran_version = b'NX8.5 '
elif is_msc or is_optistruct:
day, month, year = model.date
op2_file.write(pack(endian + b'9i 28s i', *[12,
day, month, year - 2000,
12, 4, 7, 4,
28, tape_code, 28]))
nastran_version = b'XXXXXXXX'
else:
raise NotImplementedError(model._nastran_format)
op2_file.write(pack(endian + b'4i 8s i', *[4, 2, 4,
#4, 2, 4,
#4, 1, 4,
#4, 8, 4,
8, nastran_version, 8]))
op2_file.write(pack(endian + b'6i', *[4, -1, 4,
4, 0, 4,]))
elif post == -2:
_write_markers(op2_file, fop2_ascii, [2, 4])
else:
raise RuntimeError(f'post = {post:d}; use -1 or -2')
def write_op2_header(obj: OP2,
fop2,
fop2_ascii,
struct_3i,
post: int = -1,
endian: bytes = b'<'):
"""writes the op2 header"""
is_nx = obj.is_nx
if obj.date == (1, 1, 2000): # (7, 24, 2020)
today = datetime.datetime.today()
obj.date = (today.month, today.day, today.year)
if post == -1:
#_write_markers(op2, op2_ascii, [3, 0, 7])
fop2.write(struct_3i.pack(*[
4,
3,
4,
]))
tape_code = b'NASTRAN FORT TAPE ID CODE - '
if is_nx:
fop2.write(
pack(endian + b'7i 28s i',
*[4, 1, 4, 4, 7, 4, 28, tape_code, 28]))
nastran_version = b'NX8.5 '
else:
day, month, year = obj.date
fop2.write(
pack(
endian + b'9i 28s i', *[
12, day, month, year - 2000, 12, 4, 7, 4, 28,
tape_code, 28
]))
nastran_version = b'XXXXXXXX'
fop2.write(
pack(
endian + b'4i 8s i',
*[
4,
2,
4,
#4, 2, 4,
#4, 1, 4,
#4, 8, 4,
8,
nastran_version,
8
]))
fop2.write(pack(endian + b'6i', *[
4,
-1,
4,
4,
0,
4,
]))
elif post == -2:
_write_markers(fop2, fop2_ascii, [2, 4])
else:
raise RuntimeError('post = %r; use -1 or -2' % post)
