-# 3d mesh generation
+# 3d mesh generation and mesh exploration
import salome
salome.salome_init()
-import GEOM
from salome.geom import geomBuilder
geompy = geomBuilder.New(salome.myStudy)
-import SMESH, SALOMEDS
+import SMESH
from salome.smesh import smeshBuilder
smesh = smeshBuilder.New(salome.myStudy)
###
# Geometry: an assembly of a box, a cylinder and a truncated cone
-# meshed with tetrahedral
+# to be meshed with tetrahedra
###
# Define values
geompy.addToStudy(piece, name)
# Create a group of faces
-group = geompy.CreateGroup(piece, geompy.ShapeType["FACE"])
+faces_group = geompy.CreateGroup(piece, geompy.ShapeType["FACE"])
group_name = name + "_grp"
-geompy.addToStudy(group, group_name)
-group.SetName(group_name)
+geompy.addToStudy(faces_group, group_name)
+faces_group.SetName(group_name)
# Add faces to the group
faces = geompy.SubShapeAllIDs(piece, geompy.ShapeType["FACE"])
-geompy.UnionIDs(group, faces)
+geompy.UnionIDs(faces_group, faces)
###
# Create a mesh
# Define a mesh on a geometry
tetra = smesh.Mesh(piece, name)
-# Define 1D hypothesis
+# Define 1D algorithm and hypothesis
algo1d = tetra.Segment()
algo1d.LocalLength(10)
-# Define 2D hypothesis
+# Define 2D algorithm and hypothesis
algo2d = tetra.Triangle()
algo2d.LengthFromEdges()
-# Define 3D hypothesis
+# Define 3D algorithm and hypothesis
algo3d = tetra.Tetrahedron()
algo3d.MaxElementVolume(100)
# Compute the mesh
tetra.Compute()
-# Create a groupe of faces
-tetra.Group(group)
+# Create a mesh group of all triangles generated on geom faces present in faces_group
+group = tetra.Group(faces_group)
+
+###
+# Explore the mesh
+###
+
+# Retrieve coordinates of nodes
+coordStr = ""
+for node in tetra.GetNodesId():
+ x,y,z = tetra.GetNodeXYZ( node )
+ coordStr += "%s (%s, %s, %s) " % ( node, x,y,z )
+ pass
+
+# Retrieve nodal connectivity of triangles
+triaStr = ""
+for tria in tetra.GetElementsByType( SMESH.FACE ):
+ nodes = tetra.GetElemNodes( tria )
+ triaStr += "%s (%s, %s, %s) " % ( tria, nodes[0], nodes[1], nodes[2] )
