1 # -*- coding: iso-8859-1 -*-
2 # Copyright (C) 2007-2008 CEA/DEN, EDF R&D, OPEN CASCADE
4 # Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
5 # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
7 # This library is free software; you can redistribute it and/or
8 # modify it under the terms of the GNU Lesser General Public
9 # License as published by the Free Software Foundation; either
10 # version 2.1 of the License.
12 # This library is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # Lesser General Public License for more details.
17 # You should have received a copy of the GNU Lesser General Public
18 # License along with this library; if not, write to the Free Software
19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
27 def GetNewNodes(mesh,Elems,OldNodes):
29 Auxilary function, which return list of nodes from
30 given Elems avoided nodes from OldNodes
34 nbn = mesh.GetElemNbNodes(i)
35 for j in range(0,nbn):
36 nn = mesh.GetElemNode(i,j)
38 for k in range(0,len(newnodes)):
44 for k in range(0,len(OldNodes)):
55 smesh.SetCurrentStudy(salome.myStudy)
62 # create a cross from quadrangle faces
63 # 1. create first edge and make extrusion along 0x
64 n1 = mesh.AddNode(55,-5,0)
65 n2 = mesh.AddNode(55,5,0)
66 e1 = mesh.AddEdge([n1,n2])
67 dir1 = smesh.DirStruct(smesh.PointStruct(-10,0,0))
68 mesh.ExtrusionSweep([e1],dir1,11)
69 # 2. create second edge and make extrusion along 0y
70 n3 = mesh.AddNode(-5,-55,0)
71 n4 = mesh.AddNode(5,-55,0)
72 e2 = mesh.AddEdge([n3,n4])
73 dir2 = smesh.DirStruct(smesh.PointStruct(0,10,0))
74 mesh.ExtrusionSweep([e2],dir2,11)
76 # since result has coincident nodes and faces
77 # we have to make merge
78 nodes = mesh.FindCoincidentNodes(0.001)
79 mesh.MergeNodes(nodes)
80 mesh.MergeEqualElements()
82 # make extrusion faces along 0z
83 faces = mesh.GetElementsByType(smesh.FACE)
88 dir3 = smesh.DirStruct(smesh.PointStruct(0,0,zstep))
89 newfaces = [] # list for keeping created top faces
92 for i in range(0,nbzsteps):
93 mesh.ExtrusionSweep(faces,dir3,1)
94 # find top faces after each extrusion and keep them
95 res = mesh.GetLastCreatedElems()
99 nbn = mesh.GetElemNbNodes(j)
101 nn1 = mesh.GetElemNode(j,0)
102 xyz1 = mesh.GetNodeXYZ(nn1)
103 nn2 = mesh.GetElemNode(j,1)
104 xyz2 = mesh.GetNodeXYZ(nn2)
105 nn3 = mesh.GetElemNode(j,2)
106 xyz3 = mesh.GetNodeXYZ(nn3)
107 if abs(xyz1[2]-xyz2[2])<tol and abs(xyz1[2]-xyz3[2])<tol :
108 # this face is a top face
113 print "len(nfaces)!=nbf"
115 newfaces.append(nfaces)
116 # update faces for before next step of extrusion
120 # rotate faces from newfaces
121 axisr1 = smesh.AxisStruct(0,0,0,0,0,1)
122 for i in range(0,nbzsteps):
123 ang = maxang*(1-math.cos((i+1)*math.pi/nbzsteps))
124 mesh.Rotate(newfaces[i],axisr1,ang,0)
128 # create two edges and rotate them for creation
130 n5 = mesh.AddNode(65,0,0)
131 n6 = mesh.AddNode(67.5,0,0)
132 n7 = mesh.AddNode(70,0,0)
133 e56 = mesh.AddEdge([n5,n6])
134 e67 = mesh.AddEdge([n6,n7])
135 axisr2 = smesh.AxisStruct(65,0,0,0,1,0)
136 mesh.RotationSweep([e56,e67],axisr2, math.pi/6, 12, tol)
137 res = mesh.GetLastCreatedElems()
140 nbn = mesh.GetElemNbNodes(i)
141 if nbn>2: faces1.append(i)
145 # create other two edges and rotate them for creation
147 n8 = mesh.AddNode(-65,0,0)
148 n9 = mesh.AddNode(-67.5,0,0)
149 n10 = mesh.AddNode(-70,0,0)
150 e8 = mesh.AddEdge([n8,n9])
151 e9 = mesh.AddEdge([n9,n10])
152 axisr3 = smesh.AxisStruct(-65,0,0,0,-1,0)
153 mesh.RotationSweep([e8,e9],axisr3, math.pi/6, 12, tol)
154 res = mesh.GetLastCreatedElems()
157 nbn = mesh.GetElemNbNodes(i)
158 if nbn>2: faces2.append(i)
162 # there are coincident nodes after rotation
163 # therefore we have to merge nodes
164 nodes = mesh.FindCoincidentNodes(0.001)
165 mesh.MergeNodes(nodes)
169 nbrs = nbcircs*nbrsteps
170 dz = nbzsteps*zstep/nbrs
172 # create first spiral
174 newnodes = GetNewNodes(mesh,faces1,oldnodes)
178 mesh.RotationSweep(faces1,axisr1, math.pi*2/nbrsteps, nbrs, tol)
179 res = mesh.GetLastCreatedElems()
181 for i in range(0,nbrs):
183 for j in range(0,nbf1): volumes.append(res[i+j*nbrs])
184 newnodes = GetNewNodes(mesh,volumes,oldnodes)
186 xyz = mesh.GetNodeXYZ(j)
187 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
192 # create second spiral
194 newnodes = GetNewNodes(mesh,faces2,oldnodes)
198 mesh.RotationSweep(faces2,axisr1, math.pi*2/nbrsteps, nbrs, tol)
199 res = mesh.GetLastCreatedElems()
201 for i in range(0,nbrs):
203 for j in range(0,nbf2): volumes.append(res[i+j*nbrs])
204 newnodes = GetNewNodes(mesh,volumes,oldnodes)
206 xyz = mesh.GetNodeXYZ(j)
207 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
212 smesh.salome.sg.updateObjBrowser(1)