finally:
if status != 0:
sys.exit(status)
# max size of meshname : med.MED_NAME_SIZE+1
meshname = "2D unstructured mesh"
spacedim = 2
meshdim = 2
# max size of axisname and unitname : 2*med.MED_SNAME_SIZE+1
# 12345678901234561234567890123456
axisname = "x y "
unitname = "cm cm "
# ten nodes with two of them shared by the two polygons
coordinates = med.MEDFLOAT([
0.5, 0., 1.5, 0., 0., 0.5, 1., 0.5, 2., 0.5, 0., 1., 1., 1., 2., 1., 0.5,
2., 1.5, 2.
])
nnodes = 10
indexsize = 3
index = med.MEDINT([1, 7, 13])
# connectivity : 2 hexagons
connectivity = med.MEDINT([1, 4, 7, 9, 6, 3, 2, 5, 8, 10, 7, 4])
# MED file creation
try:
fid = med.MEDfileOpen("UsesCase_MEDmesh_13.med", med.MED_ACC_CREAT)
except RuntimeError as ex:
print("ERROR : file creation ...\n%s" % ex)
sys.exit(-1)
# write a comment in the file
status = -1
finally:
if status != 0:
sys.exit(status)
# max size of meshname : med.MED_NAME_SIZE+1
meshname = "2D unstructured mesh"
spacedim = 2
meshdim = 2
# max size of axisname and unitname : 2*med.MED_SNAME_SIZE+1
# 12345678901234561234567890123456
axisname = "x y "
unitname = "cm cm "
coordinates = med.MEDFLOAT([
2., 1., 7., 1., 12., 1., 17., 1., 22., 1., 2., 6., 7., 6., 12., 6., 17.,
6., 22., 6., 2., 11., 7., 11., 12., 11., 17., 11., 22., 11.
])
nnodes = 15
triaconnectivity = med.MEDINT([
1, 7, 6, 2, 7, 1, 3, 7, 2, 8, 7, 3, 13, 7, 8, 12, 7, 13, 11, 7, 12, 6, 7,
11
])
ntria3 = 8
quadconnectivity = med.MEDINT(
[3, 4, 9, 8, 4, 5, 10, 9, 15, 14, 9, 10, 13, 8, 9, 14])
nquad4 = 4
# MED file creation
try:
fid = med.MEDfileOpen("UsesCase_MEDmesh_1.med", med.MED_ACC_CREAT)
except RuntimeError as ex:
print("ERROR : no mesh info created from MEDmeshInfo")
doCleanup(fid, -1)
else :
meshname,spacedim,meshdim,meshtype,description,dtunit,sortingtype,nstep,axistype,axisname,axisunit=meshinfo
# read how many nodes in the mesh
try :
nnodes, chgt, trsf = med.MEDmeshnEntity(fid, meshname, med.MED_NO_DT,
med.MED_NO_IT, med.MED_NODE, med.MED_NO_GEOTYPE,
med.MED_COORDINATE, med.MED_NO_CMODE)
except RuntimeError as ex :
print("ERROR : number of nodes ...\n%s" % ex)
doCleanup(fid, -1)
# read mesh nodes coordinates
coordinates = med.MEDFLOAT([0.] * nnodes * spacedim)
try :
med.MEDmeshNodeCoordinateRd(fid, meshname, med.MED_NO_DT, med.MED_NO_IT,
med.MED_FULL_INTERLACE, coordinates)
except RuntimeError as ex :
print("ERROR : nodes coordinates ...\n%s" % ex)
doCleanup(fid, -1)
# read number of geometrical types for cells
try:
ngeo, chgt2, trsf2 = med.MEDmeshnEntity(fid, meshname, med.MED_NO_DT,
med.MED_NO_IT, med.MED_CELL, med.MED_GEO_ALL,
med.MED_CONNECTIVITY, med.MED_NODAL)
except RuntimeError as ex :
print("ERROR : number of geo types ...\n%s" % ex)
doCleanup(fid, -1)
print("ERROR : close file ...\n%s" % ex)
status = -1
finally:
if status != 0:
sys.exit(status)
# max size of meshname : med.MED_NAME_SIZE+1
meshname = "2D structured mesh"
spacedim = 2
meshdim = 2
# max size of axisname and unitname : 2*med.MED_SNAME_SIZE+1
# 12345678901234561234567890123456
axisname = "x y "
unitname = "cm cm "
cooXaxis = med.MEDFLOAT([1., 2., 3., 4., 5.])
cooYaxis = med.MEDFLOAT([1., 2., 3.])
nquad4 = 8
# max size of cellsname : 8*med.MED_SNAME_SIZE+1
# 12345678901234561234567890123456123456789012345612345678901234561234567890123456123456789012345612345678901234561234567890123456
cellsnames = med.MEDCHAR(
"CELL_1 CELL_2 CELL_3 CELL_4 CELL_5 CELL_6 CELL_7 CELL_8 "
)
# max size of familyname : med.MED_NAME_SIZE+1
familyname = "CART_GRID_QUAD_FAMILY"
# max size of groupname : med.MED_LNAME_SIZE+1
groupname = med.MEDCHAR("CART_GRID_GROUP")
familynumbers = med.MEDINT([-1, -1, -1, -1, -1, -1, -1, -1])
# MED file creation
try:
status = -1
finally:
if status != 0:
sys.exit(status)
# max size of meshname : med.MED_NAME_SIZE+1
meshname = "2D unstructured mesh"
spacedim = 2
meshdim = 2
# max size of axisname and unitname : 2*med.MED_SNAME_SIZE+1
# 12345678901234561234567890123456
axisname = "x y "
unitname = "cm cm "
initial_coordinates = med.MEDFLOAT([
2., 1., 7., 1., 12., 1., 17., 1., 22., 1., 2., 6., 7., 6., 12., 6., 17.,
6., 22., 6., 2., 11., 7., 11., 12., 11., 17., 11., 22., 11.
])
nnodes = 15
triaconnectivity = med.MEDINT([
1, 7, 6, 2, 7, 1, 3, 7, 2, 8, 7, 3, 13, 7, 8, 12, 7, 13, 11, 7, 12, 6, 7,
11
])
ntria3 = 8
quadconnectivity = med.MEDINT(
[3, 4, 9, 8, 4, 5, 10, 9, 15, 14, 9, 10, 13, 8, 9, 14])
nquad4 = 4
# new coordinates (step 1) for nodes 13, 14 and 15
new_coordinates_step1 = med.MEDFLOAT([12., 15., 17., 15., 22., 15.])
# max size of profile1name : med.MED_NAME_SIZE+1
profile1name = "UPPER_QUAD4_PROFILE"
profile1 = med.MEDINT([13, 14, 15])
# a real code would check ...
# read the axis coordinates (MED_CARTESIAN coordinates system)
# X
axis = 1
try:
size, chgt, trsf = med.MEDmeshnEntity(fid, meshname, med.MED_NO_DT,
med.MED_NO_IT, med.MED_NODE,
med.MED_NONE,
med.MED_COORDINATE_AXIS1,
med.MED_NO_CMODE)
except RuntimeError as ex:
print("ERROR : number of coordinates on X axis ...\n%s" % ex)
doCleanup(fid, -1)
ncell = size - 1
cooXaxis = med.MEDFLOAT([0.] * size)
try:
med.MEDmeshGridIndexCoordinateRd(fid, meshname, med.MED_NO_DT,
med.MED_NO_IT, axis, cooXaxis)
except RuntimeError as ex:
print("ERROR : read axis X coordinates ...\n%s" % ex)
doCleanup(fid, -1)
# Y
axis = 2
try:
size2, chgt2, trsf2 = med.MEDmeshnEntity(fid, meshname, med.MED_NO_DT,
med.MED_NO_IT, med.MED_NODE,
med.MED_NONE,
med.MED_COORDINATE_AXIS2,
status = -1
finally:
if status != 0:
sys.exit(status)
# max size of meshname : med.MED_NAME_SIZE+1
meshname = "2D unstructured mesh"
spacedim = 2
meshdim = 2
# max size of axisname and unitname : 2*med.MED_SNAME_SIZE+1
# 12345678901234561234567890123456
axisname = "x y "
unitname = "cm cm "
initial_coordinates = med.MEDFLOAT([
2., 1., 7., 1., 12., 1., 17., 1., 22., 1., 2., 6., 7., 6., 12., 6., 17.,
6., 22., 6., 2., 11., 7., 11., 12., 11., 17., 11., 22., 11.
])
nnodes = 15
triaconnectivity = med.MEDINT([
1, 7, 6, 2, 7, 1, 3, 7, 2, 8, 7, 3, 13, 7, 8, 12, 7, 13, 11, 7, 12, 6, 7,
11
])
ntria3 = 8
quadconnectivity = med.MEDINT(
[3, 4, 9, 8, 4, 5, 10, 9, 15, 14, 9, 10, 13, 8, 9, 14])
nquad4 = 4
# matrix transformation (step 1) : rotation about the Y-axis : 45 degrees
transfMatrix_step1 = med.MEDFLOAT([0.0, 0.0, 0.0, 0.92388, 0.0, 0.38268, 0.0])
# matrix transformation (step 2) : rotation about the Y-axis : 90 degrees
transfMatrix_step2 = med.MEDFLOAT([0.0, 0.0, 0.0, 0.707, 0.0, 0.707, 0.0])
coordinates = med.MEDFLOAT([
-10.0,
-10.0,
+0.0, # [ 1]
-10.0,
-10.0,
+10., # [ 2]
-10.0,
+10.0,
+10., # [ 3]
-10.0,
+10.0,
+0.0, # [ 4]
+10.0,
-10.0,
+0.0, # [ 5]
+10.0,
-10.0,
+10., # [ 6]
+10.0,
+10.0,
+10., # [ 7]
+10.0,
+10.0,
+0.0, # [ 8]
-10.0,
+0.0,
+10.0, # [ 9]
-10.0,
+0.0,
+0.0, # [10]
+0.0,
-10.0,
+10.0, # [11]
+0.0,
-10.0,
+0.0, # [12]
+0.0,
+10.0,
+10.0, # [13]
+10.0,
+0.0,
+10.0, # [14]
+0.0,
+10.0,
+0.0, # [15]
+10.0,
+0.0,
+0.0 # [16]
])
