smesh/src/SMESH_SWIG/ex29_refine.py
eap 9ecacf41d1 IPAL54104: Wrong prismatic mesh
Fix sub-shape association of FACEs with a seam in a propagation case

+ Remember a state of "Show IDs" check-box in Mesh Info / Element info
2017-04-18 14:07:52 +03:00

236 lines
6.3 KiB
Python

# -*- coding: iso-8859-1 -*-
# Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
#
# =======================================
# Procedure that take a triangulation and split all triangles in 4 others triangles
#
import salome
salome.salome_init()
import GEOM
from salome.geom import geomBuilder
geompy = geomBuilder.New(salome.myStudy)
import SMESH, SALOMEDS
from salome.smesh import smeshBuilder
smesh = smeshBuilder.New(salome.myStudy)
import os
# Values
# ------
tmpDir = os.getenv('SALOME_TMP_DIR', '/tmp')
print "Output directory:", tmpDir
# Path for ".med" files
path = os.path.join( tmpDir, "ex29_%s_" % os.getenv('USER','unknown'))
# Name of the shape and the mesh
name = "Carre"
# Add a node and needed edges
# ---------------------------
def node(m, f, n1, n2, lnv):
x1, y1, z1 = m.GetNodeXYZ(n1)
x2, y2, z2 = m.GetNodeXYZ(n2)
x = (x1 + x2) / 2.0
y = (y1 + y2) / 2.0
z = (z1 + z2) / 2.0
i = m.AddNode(x, y, z)
in1 = m.GetShapeID(n1)
in2 = m.GetShapeID(n2)
if (in1==f) or (in2==f):
m.SetNodeOnFace(i, f, 0, 0)
else:
e1 = m.AddEdge([ n1, i ])
e2 = m.AddEdge([ i , n2 ])
if n1 in lnv:
e = in2
else:
e = in1
m.SetMeshElementOnShape(e1, e)
m.SetMeshElementOnShape(e2, e)
m.SetNodeOnEdge(i, e, 0)
return i
# Add a triangle and associate to the CAD face
# --------------------------------------------
def triangle(m, f, n1, n2, n3):
i = m.AddFace([ n1, n2, n3 ])
m.SetMeshElementOnShape(i, f)
# Split all triangles in 4 triangles
# ----------------------------------
def SplitTrianglesIn4(m):
# Get all triangles
triangles = m.GetElementsByType(SMESH.FACE)
# Remove all edges
m.RemoveElements(m.GetElementsByType(SMESH.EDGE))
# Get the list of nodes (ids) associated with the CAD vertices
shape = m.GetShape()
lnv = []
for v in geompy.SubShapeAll(shape, geompy.ShapeType["VERTEX"]):
lnv = lnv + m.GetSubMeshNodesId(v, True)
# Split every triangle
for t in triangles:
noeud_1, noeud_2, noeud_3 = m.GetElemNodes(t)
face = m.GetShapeIDForElem(t)
noeud_12 = node(m, face, noeud_1, noeud_2, lnv)
noeud_23 = node(m, face, noeud_2, noeud_3, lnv)
noeud_13 = node(m, face, noeud_1, noeud_3, lnv)
triangle(m, face, noeud_1 , noeud_12, noeud_13)
triangle(m, face, noeud_2 , noeud_23, noeud_12)
triangle(m, face, noeud_3 , noeud_13, noeud_23)
triangle(m, face, noeud_12, noeud_23, noeud_13)
# Remove all initial triangles
m.RemoveElements(triangles)
# Merge all identical nodes
m.MergeNodes(m.FindCoincidentNodes(0.0001))
# Build a CAD square
# ------------------
x0 = 0.0 ; y0 = 0.0 ; z0 = 0.0
x1 = 1.0 ; y1 = 0.0 ; z1 = 0.0
x2 = 1.0 ; y2 = 1.0 ; z2 = 0.0
x3 = 0.0 ; y3 = 1.0 ; z3 = 0.0
P0 = geompy.MakeVertex(x0, y0, z0)
P1 = geompy.MakeVertex(x1, y1, z1)
P2 = geompy.MakeVertex(x2, y2, z2)
P3 = geompy.MakeVertex(x3, y3, z3)
square = geompy.MakeQuad4Vertices(P0, P1, P2, P3)
geompy.addToStudy(square, name)
# Refine edges and create group of mesh
# -------------------------------------
def refine(m, p1, p2, n, k, name):
s = m.GetShape()
g = geompy.CreateGroup(s, geompy.ShapeType["EDGE"])
e = geompy.GetEdge(s, p1, p2)
i = geompy.GetSubShapeID(s, e)
geompy.AddObject(g, i)
m.Group(g, name)
a = m.Segment(e)
a.NumberOfSegments(n, k)
# Mesh the square
# ---------------
MyMesh = smesh.Mesh(square)
refine(MyMesh, P1, P2, 8, 7, "Droite")
refine(MyMesh, P3, P0, 9, 10, "Gauche")
refine(MyMesh, P0, P1, 7, 9, "Bas" )
refine(MyMesh, P2, P3, 12, 14, "Haut" )
algo2D = MyMesh.Triangle()
algo2D.MaxElementArea(0.07)
MyMesh.Compute()
MyMesh.ExportMED(path+"110_triangles.med", 0)
# Disturb the mesh
# ----------------
MyMesh.MoveNode( 37, 0.05 , 0.368967 , 0 )
MyMesh.MoveNode( 38, 0.34 , 0.0762294, 0 )
MyMesh.MoveNode( 40, 0.8 , 0.42 , 0 )
MyMesh.MoveNode( 42, 0.702662, 0.74 , 0 )
MyMesh.MoveNode( 46, 0.4 , 0.374656 , 0 )
MyMesh.MoveNode( 47, 0.13 , 0.63 , 0 )
MyMesh.MoveNode( 49, 0.222187, 0.3 , 0 )
MyMesh.MoveNode( 54, 0.557791, 0.05 , 0 )
MyMesh.MoveNode( 55, 0.7 , 0.2 , 0 )
MyMesh.MoveNode( 56, 0.73 , 0.52 , 0 )
MyMesh.MoveNode( 58, 0.313071, 0.31 , 0 )
MyMesh.MoveNode( 59, 0.8 , 0.56 , 0 )
MyMesh.MoveNode( 62, 0.592703, 0.95 , 0 )
MyMesh.MoveNode( 63, 0.28 , 0.5 , 0 )
MyMesh.MoveNode( 65, 0.49 , 0.93 , 0 )
MyMesh.MoveNode( 68, 0.501038, 0.65 , 0 )
MyMesh.MoveNode( 69, 0.37 , 0.63 , 0 )
MyMesh.MoveNode( 70, 0.597025, 0.52 , 0 )
MyMesh.MoveNode( 72, 0.899 , 0.878589 , 0 )
MyMesh.MoveNode( 73, 0.92 , 0.85 , 0 )
MyMesh.MoveNode( 74, 0.820851, 0.75 , 0 )
NbCells1 = 110
MyMesh.ExportMED(path+"110_triangles_2.med", 0)
# First mesh refining
# -------------------
SplitTrianglesIn4(MyMesh)
NbCells2 = NbCells1*4
print("Mesh with "+str(NbCells2)+" cells computed.")
MyMesh.ExportMED(path+str(NbCells2)+"_triangles.med", 0)
# Second mesh refining
# --------------------
SplitTrianglesIn4(MyMesh)
NbCells3 = NbCells2*4
print("Mesh with "+str(NbCells3)+" cells computed.")
MyMesh.ExportMED(path+str(NbCells3)+"_triangles.med",0)
# Third mesh refining
# -------------------
SplitTrianglesIn4(MyMesh)
NbCells4 = NbCells3*4
print("Mesh with "+str(NbCells4)+" cells computed.")
MyMesh.ExportMED(path+str(NbCells4)+"_triangles.med", 0)
# Update the object browser
# -------------------------
salome.sg.updateObjBrowser(True)