+++ /dev/null
-# -*- coding: utf-8 -*-
-# Copyright (C) 2007-2022 CEA/DEN, EDF R&D, OPEN CASCADE
-#
-# Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
-# CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
-#
-# 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
-#
-
-import salome
-salome.salome_init()
-import GEOM
-from salome.geom import geomBuilder
-geompy = geomBuilder.New()
-
-import SMESH, SALOMEDS
-from salome.smesh import smeshBuilder
-smesh = smeshBuilder.New()
-
-import math
-
-def GetNewNodes(mesh,Elems,OldNodes):
- """
- Auxiliary function, which return list of nodes from
- given Elems avoided nodes from OldNodes
- """
- newnodes = []
- for i in Elems:
- nbn = mesh.GetElemNbNodes(i)
- for j in range(0,nbn):
- nn = mesh.GetElemNode(i,j)
- isold = 0
- for k in range(0,len(newnodes)):
- if nn==newnodes[k]:
- isold = 1
- break
- pass
- if isold: continue
- for k in range(0,len(OldNodes)):
- if nn==OldNodes[k]:
- isold = 1
- break
- pass
- if isold: continue
- newnodes.append(nn)
- pass
- pass
- return newnodes
-
-
-# create empty mesh
-mesh = smesh.Mesh()
-
-tol = 0.001
-
-# create a cross from quadrangle faces
-# 1. create first edge and make extrusion along 0x
-n1 = mesh.AddNode(55,-5,0)
-n2 = mesh.AddNode(55,5,0)
-e1 = mesh.AddEdge([n1,n2])
-dir1 = SMESH.DirStruct(SMESH.PointStruct(-10,0,0))
-mesh.ExtrusionSweep([e1],dir1,11)
-# 2. create second edge and make extrusion along 0y
-n3 = mesh.AddNode(-5,-55,0)
-n4 = mesh.AddNode(5,-55,0)
-e2 = mesh.AddEdge([n3,n4])
-dir2 = SMESH.DirStruct(SMESH.PointStruct(0,10,0))
-mesh.ExtrusionSweep([e2],dir2,11)
-
-# since result has coincident nodes and faces
-# we have to make merge
-nodes = mesh.FindCoincidentNodes(0.001)
-mesh.MergeNodes(nodes)
-mesh.MergeEqualElements()
-
-# make extrusion faces along 0z
-faces = mesh.GetElementsByType(SMESH.FACE)
-nbf = len(faces)
-maxang = 2.0
-zstep = 5
-nbzsteps = 50
-dir3 = SMESH.DirStruct(SMESH.PointStruct(0,0,zstep))
-newfaces = [] # list for keeping created top faces
- # during extrusion
-
-for i in range(0,nbzsteps):
- mesh.ExtrusionSweep(faces,dir3,1)
- # find top faces after each extrusion and keep them
- res = mesh.GetLastCreatedElems()
- nbr = len(res)
- nfaces = []
- for j in res:
- nbn = mesh.GetElemNbNodes(j)
- if nbn!=4: continue
- nn1 = mesh.GetElemNode(j,0)
- xyz1 = mesh.GetNodeXYZ(nn1)
- nn2 = mesh.GetElemNode(j,1)
- xyz2 = mesh.GetNodeXYZ(nn2)
- nn3 = mesh.GetElemNode(j,2)
- xyz3 = mesh.GetNodeXYZ(nn3)
- if abs(xyz1[2]-xyz2[2])<tol and abs(xyz1[2]-xyz3[2])<tol :
- # this face is a top face
- nfaces.append(j)
- pass
- pass
- if len(nfaces)!=nbf:
- print("len(nfaces)!=nbf")
- break
- newfaces.append(nfaces)
- # update faces for before next step of extrusion
- faces = nfaces
- pass
-
-# rotate faces from newfaces
-axisr1 = SMESH.AxisStruct(0,0,0,0,0,1)
-for i in range(0,nbzsteps):
- ang = maxang*(1-math.cos((i+1)*math.pi/nbzsteps))
- mesh.Rotate(newfaces[i],axisr1,ang,0)
-
-
-# create circles
-# create two edges and rotate them for creation
-# full circle
-n5 = mesh.AddNode(65,0,0)
-n6 = mesh.AddNode(67.5,0,0)
-n7 = mesh.AddNode(70,0,0)
-e56 = mesh.AddEdge([n5,n6])
-e67 = mesh.AddEdge([n6,n7])
-axisr2 = SMESH.AxisStruct(65,0,0,0,1,0)
-mesh.RotationSweep([e56,e67],axisr2, math.pi/6, 12, tol)
-res = mesh.GetLastCreatedElems()
-faces1 = []
-for i in res:
- nbn = mesh.GetElemNbNodes(i)
- if nbn>2: faces1.append(i)
- pass
-nbf1 = len(faces1)
-
-# create other two edges and rotate them for creation
-# other full circle
-n8 = mesh.AddNode(-65,0,0)
-n9 = mesh.AddNode(-67.5,0,0)
-n10 = mesh.AddNode(-70,0,0)
-e8 = mesh.AddEdge([n8,n9])
-e9 = mesh.AddEdge([n9,n10])
-axisr3 = SMESH.AxisStruct(-65,0,0,0,-1,0)
-mesh.RotationSweep([e8,e9],axisr3, math.pi/6, 12, tol)
-res = mesh.GetLastCreatedElems()
-faces2 = []
-for i in res:
- nbn = mesh.GetElemNbNodes(i)
- if nbn>2: faces2.append(i)
- pass
-nbf2 = len(faces2)
-
-# there are coincident nodes after rotation
-# therefore we have to merge nodes
-nodes = mesh.FindCoincidentNodes(0.001)
-mesh.MergeNodes(nodes)
-
-nbcircs = 2
-nbrsteps = 24
-nbrs = nbcircs*nbrsteps
-dz = nbzsteps*zstep/nbrs
-
-# create first spiral
-oldnodes = []
-newnodes = GetNewNodes(mesh,faces1,oldnodes)
-oldnodes = newnodes
-
-nodes = []
-mesh.RotationSweep(faces1,axisr1, math.pi*2/nbrsteps, nbrs, tol)
-res = mesh.GetLastCreatedElems()
-
-for i in range(0,nbrs):
- volumes = []
- for j in range(0,nbf1): volumes.append(res[i+j*nbrs])
- newnodes = GetNewNodes(mesh,volumes,oldnodes)
- for j in newnodes:
- xyz = mesh.GetNodeXYZ(j)
- mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
- pass
- oldnodes = newnodes
- pass
-
-# create second spiral
-oldnodes = []
-newnodes = GetNewNodes(mesh,faces2,oldnodes)
-oldnodes = newnodes
-
-nodes = []
-mesh.RotationSweep(faces2,axisr1, math.pi*2/nbrsteps, nbrs, tol)
-res = mesh.GetLastCreatedElems()
-
-for i in range(0,nbrs):
- volumes = []
- for j in range(0,nbf2): volumes.append(res[i+j*nbrs])
- newnodes = GetNewNodes(mesh,volumes,oldnodes)
- for j in newnodes:
- xyz = mesh.GetNodeXYZ(j)
- mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
- pass
- oldnodes = newnodes
- pass
-
-salome.sg.updateObjBrowser()
