1 # -*- coding: iso-8859-1 -*-
2 # Copyright (C) 2007-2010 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
28 def GetNewNodes(mesh,Elems,OldNodes):
30 Auxilary function, which return list of nodes from
31 given Elems avoided nodes from OldNodes
35 nbn = mesh.GetElemNbNodes(i)
36 for j in range(0,nbn):
37 nn = mesh.GetElemNode(i,j)
39 for k in range(0,len(newnodes)):
45 for k in range(0,len(OldNodes)):
56 smesh.SetCurrentStudy(salome.myStudy)
63 # create a cross from quadrangle faces
64 # 1. create first edge and make extrusion along 0x
65 n1 = mesh.AddNode(55,-5,0)
66 n2 = mesh.AddNode(55,5,0)
67 e1 = mesh.AddEdge([n1,n2])
68 dir1 = smesh.DirStruct(smesh.PointStruct(-10,0,0))
69 mesh.ExtrusionSweep([e1],dir1,11)
70 # 2. create second edge and make extrusion along 0y
71 n3 = mesh.AddNode(-5,-55,0)
72 n4 = mesh.AddNode(5,-55,0)
73 e2 = mesh.AddEdge([n3,n4])
74 dir2 = smesh.DirStruct(smesh.PointStruct(0,10,0))
75 mesh.ExtrusionSweep([e2],dir2,11)
77 # since result has coincident nodes and faces
78 # we have to make merge
79 nodes = mesh.FindCoincidentNodes(0.001)
80 mesh.MergeNodes(nodes)
81 mesh.MergeEqualElements()
83 # make extrusion faces along 0z
84 faces = mesh.GetElementsByType(smesh.FACE)
89 dir3 = smesh.DirStruct(smesh.PointStruct(0,0,zstep))
90 newfaces = [] # list for keeping created top faces
93 for i in range(0,nbzsteps):
94 mesh.ExtrusionSweep(faces,dir3,1)
95 # find top faces after each extrusion and keep them
96 res = mesh.GetLastCreatedElems()
100 nbn = mesh.GetElemNbNodes(j)
102 nn1 = mesh.GetElemNode(j,0)
103 xyz1 = mesh.GetNodeXYZ(nn1)
104 nn2 = mesh.GetElemNode(j,1)
105 xyz2 = mesh.GetNodeXYZ(nn2)
106 nn3 = mesh.GetElemNode(j,2)
107 xyz3 = mesh.GetNodeXYZ(nn3)
108 if abs(xyz1[2]-xyz2[2])<tol and abs(xyz1[2]-xyz3[2])<tol :
109 # this face is a top face
114 print "len(nfaces)!=nbf"
116 newfaces.append(nfaces)
117 # update faces for before next step of extrusion
121 # rotate faces from newfaces
122 axisr1 = smesh.AxisStruct(0,0,0,0,0,1)
123 for i in range(0,nbzsteps):
124 ang = maxang*(1-math.cos((i+1)*math.pi/nbzsteps))
125 mesh.Rotate(newfaces[i],axisr1,ang,0)
129 # create two edges and rotate them for creation
131 n5 = mesh.AddNode(65,0,0)
132 n6 = mesh.AddNode(67.5,0,0)
133 n7 = mesh.AddNode(70,0,0)
134 e56 = mesh.AddEdge([n5,n6])
135 e67 = mesh.AddEdge([n6,n7])
136 axisr2 = smesh.AxisStruct(65,0,0,0,1,0)
137 mesh.RotationSweep([e56,e67],axisr2, math.pi/6, 12, tol)
138 res = mesh.GetLastCreatedElems()
141 nbn = mesh.GetElemNbNodes(i)
142 if nbn>2: faces1.append(i)
146 # create other two edges and rotate them for creation
148 n8 = mesh.AddNode(-65,0,0)
149 n9 = mesh.AddNode(-67.5,0,0)
150 n10 = mesh.AddNode(-70,0,0)
151 e8 = mesh.AddEdge([n8,n9])
152 e9 = mesh.AddEdge([n9,n10])
153 axisr3 = smesh.AxisStruct(-65,0,0,0,-1,0)
154 mesh.RotationSweep([e8,e9],axisr3, math.pi/6, 12, tol)
155 res = mesh.GetLastCreatedElems()
158 nbn = mesh.GetElemNbNodes(i)
159 if nbn>2: faces2.append(i)
163 # there are coincident nodes after rotation
164 # therefore we have to merge nodes
165 nodes = mesh.FindCoincidentNodes(0.001)
166 mesh.MergeNodes(nodes)
170 nbrs = nbcircs*nbrsteps
171 dz = nbzsteps*zstep/nbrs
173 # create first spiral
175 newnodes = GetNewNodes(mesh,faces1,oldnodes)
179 mesh.RotationSweep(faces1,axisr1, math.pi*2/nbrsteps, nbrs, tol)
180 res = mesh.GetLastCreatedElems()
182 for i in range(0,nbrs):
184 for j in range(0,nbf1): volumes.append(res[i+j*nbrs])
185 newnodes = GetNewNodes(mesh,volumes,oldnodes)
187 xyz = mesh.GetNodeXYZ(j)
188 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
193 # create second spiral
195 newnodes = GetNewNodes(mesh,faces2,oldnodes)
199 mesh.RotationSweep(faces2,axisr1, math.pi*2/nbrsteps, nbrs, tol)
200 res = mesh.GetLastCreatedElems()
202 for i in range(0,nbrs):
204 for j in range(0,nbf2): volumes.append(res[i+j*nbrs])
205 newnodes = GetNewNodes(mesh,volumes,oldnodes)
207 xyz = mesh.GetNodeXYZ(j)
208 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
213 smesh.salome.sg.updateObjBrowser(1)