Introduction to MESH module python interface
Package smesh provides a standard API for meshes creation and edition.
Below you can see an example of package smesh usage for 3d mesh generation.
from geompy import *
import smesh
# Geometry
# ========
# an assembly of a box, a cylinder and a truncated cone meshed with tetrahedral.
# Define values
# -------------
name = "ex21_lamp"
cote = 60
section = 20
size = 200
radius_1 = 80
radius_2 = 40
height = 100
# Build a box
# -----------
box = MakeBox(-cote, -cote, -cote, +cote, +cote, +cote)
# Build a cylinder
# ----------------
pt1 = MakeVertex(0, 0, cote/3)
di1 = MakeVectorDXDYDZ(0, 0, 1)
cyl = MakeCylinder(pt1, di1, section, size)
# Build a truncated cone
# ----------------------
pt2 = MakeVertex(0, 0, size)
cone = MakeCone(pt2, di1, radius_1, radius_2, height)
# Fuse
# ----
box_cyl = MakeFuse(box, cyl)
piece = MakeFuse(box_cyl, cone)
# Add in study
# ------------
addToStudy(piece, name)
# Create a group of faces
# -----------------------
group = CreateGroup(piece, ShapeType["FACE"])
group_name = name + "_grp"
addToStudy(group, group_name)
group.SetName(group_name)
# Add faces in the group
# ----------------------
faces = SubShapeAllIDs(piece, ShapeType["FACE"])
UnionIDs(group, faces)
# Create a mesh
# =============
# Define a mesh on a geometry
# ---------------------------
tetra = smesh.Mesh(piece, name)
# Define 1D hypothesis
# --------------------
algo1d = tetra.Segment()
algo1d.LocalLength(10)
# Define 2D hypothesis
# --------------------
algo2d = tetra.Triangle()
algo2d.LengthFromEdges()
# Define 3D hypothesis
# --------------------
algo3d = tetra.Tetrahedron(smesh.NETGEN)
algo3d.MaxElementVolume(100)
# Compute the mesh
# ----------------
tetra.Compute()
# Create a groupe of faces
# ------------------------
tetra.Group(group)