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
26 def GetNewNodes(mesh,Elems,OldNodes):
28 Auxilary function, which return list of nodes from
29 given Elems avoided nodes from OldNodes
33 nbn = mesh.GetElemNbNodes(i)
34 for j in range(0,nbn):
35 nn = mesh.GetElemNode(i,j)
37 for k in range(0,len(newnodes)):
43 for k in range(0,len(OldNodes)):
54 smesh.SetCurrentStudy(salome.myStudy)
61 # create a cross from quadrangle faces
62 # 1. create first edge and make extrusion along 0x
63 n1 = mesh.AddNode(55,-5,0)
64 n2 = mesh.AddNode(55,5,0)
65 e1 = mesh.AddEdge([n1,n2])
66 dir1 = smesh.DirStruct(smesh.PointStruct(-10,0,0))
67 mesh.ExtrusionSweep([e1],dir1,11)
68 # 2. create second edge and make extrusion along 0y
69 n3 = mesh.AddNode(-5,-55,0)
70 n4 = mesh.AddNode(5,-55,0)
71 e2 = mesh.AddEdge([n3,n4])
72 dir2 = smesh.DirStruct(smesh.PointStruct(0,10,0))
73 mesh.ExtrusionSweep([e2],dir2,11)
75 # since result has coincident nodes and faces
76 # we have to make merge
77 nodes = mesh.FindCoincidentNodes(0.001)
78 mesh.MergeNodes(nodes)
79 mesh.MergeEqualElements()
81 # make extrusion faces along 0z
82 faces = mesh.GetElementsByType(smesh.FACE)
87 dir3 = smesh.DirStruct(smesh.PointStruct(0,0,zstep))
88 newfaces = [] # list for keeping created top faces
91 for i in range(0,nbzsteps):
92 mesh.ExtrusionSweep(faces,dir3,1)
93 # find top faces after each extrusion and keep them
94 res = mesh.GetLastCreatedElems()
98 nbn = mesh.GetElemNbNodes(j)
100 nn1 = mesh.GetElemNode(j,0)
101 xyz1 = mesh.GetNodeXYZ(nn1)
102 nn2 = mesh.GetElemNode(j,1)
103 xyz2 = mesh.GetNodeXYZ(nn2)
104 nn3 = mesh.GetElemNode(j,2)
105 xyz3 = mesh.GetNodeXYZ(nn3)
106 if abs(xyz1[2]-xyz2[2])<tol and abs(xyz1[2]-xyz3[2])<tol :
107 # this face is a top face
112 print "len(nfaces)!=nbf"
114 newfaces.append(nfaces)
115 # update faces for before next step of extrusion
119 # rotate faces from newfaces
120 axisr1 = smesh.AxisStruct(0,0,0,0,0,1)
121 for i in range(0,nbzsteps):
122 ang = maxang*(1-math.cos((i+1)*math.pi/nbzsteps))
123 mesh.Rotate(newfaces[i],axisr1,ang,0)
127 # create two edges and rotate them for creation
129 n5 = mesh.AddNode(65,0,0)
130 n6 = mesh.AddNode(67.5,0,0)
131 n7 = mesh.AddNode(70,0,0)
132 e56 = mesh.AddEdge([n5,n6])
133 e67 = mesh.AddEdge([n6,n7])
134 axisr2 = smesh.AxisStruct(65,0,0,0,1,0)
135 mesh.RotationSweep([e56,e67],axisr2, math.pi/6, 12, tol)
136 res = mesh.GetLastCreatedElems()
139 nbn = mesh.GetElemNbNodes(i)
140 if nbn>2: faces1.append(i)
144 # create other two edges and rotate them for creation
146 n8 = mesh.AddNode(-65,0,0)
147 n9 = mesh.AddNode(-67.5,0,0)
148 n10 = mesh.AddNode(-70,0,0)
149 e8 = mesh.AddEdge([n8,n9])
150 e9 = mesh.AddEdge([n9,n10])
151 axisr3 = smesh.AxisStruct(-65,0,0,0,-1,0)
152 mesh.RotationSweep([e8,e9],axisr3, math.pi/6, 12, tol)
153 res = mesh.GetLastCreatedElems()
156 nbn = mesh.GetElemNbNodes(i)
157 if nbn>2: faces2.append(i)
161 # there are coincident nodes after rotation
162 # therefore we have to merge nodes
163 nodes = mesh.FindCoincidentNodes(0.001)
164 mesh.MergeNodes(nodes)
168 nbrs = nbcircs*nbrsteps
169 dz = nbzsteps*zstep/nbrs
171 # create first spiral
173 newnodes = GetNewNodes(mesh,faces1,oldnodes)
177 mesh.RotationSweep(faces1,axisr1, math.pi*2/nbrsteps, nbrs, tol)
178 res = mesh.GetLastCreatedElems()
180 for i in range(0,nbrs):
182 for j in range(0,nbf1): volumes.append(res[i+j*nbrs])
183 newnodes = GetNewNodes(mesh,volumes,oldnodes)
185 xyz = mesh.GetNodeXYZ(j)
186 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
191 # create second spiral
193 newnodes = GetNewNodes(mesh,faces2,oldnodes)
197 mesh.RotationSweep(faces2,axisr1, math.pi*2/nbrsteps, nbrs, tol)
198 res = mesh.GetLastCreatedElems()
200 for i in range(0,nbrs):
202 for j in range(0,nbf2): volumes.append(res[i+j*nbrs])
203 newnodes = GetNewNodes(mesh,volumes,oldnodes)
205 xyz = mesh.GetNodeXYZ(j)
206 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
211 smesh.salome.sg.updateObjBrowser(1)