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)):
60 # create a cross from quadrangle faces
61 # 1. create first edge and make extrusion along 0x
62 n1 = mesh.AddNode(55,-5,0)
63 n2 = mesh.AddNode(55,5,0)
64 e1 = mesh.AddEdge([n1,n2])
65 dir1 = smesh.DirStruct(smesh.PointStruct(-10,0,0))
66 mesh.ExtrusionSweep([e1],dir1,11)
67 # 2. create second edge and make extrusion along 0y
68 n3 = mesh.AddNode(-5,-55,0)
69 n4 = mesh.AddNode(5,-55,0)
70 e2 = mesh.AddEdge([n3,n4])
71 dir2 = smesh.DirStruct(smesh.PointStruct(0,10,0))
72 mesh.ExtrusionSweep([e2],dir2,11)
74 # since result has coincident nodes and faces
75 # we have to make merge
76 nodes = mesh.FindCoincidentNodes(0.001)
77 mesh.MergeNodes(nodes)
78 mesh.MergeEqualElements()
80 # make extrusion faces along 0z
81 faces = mesh.GetElementsByType(smesh.FACE)
86 dir3 = smesh.DirStruct(smesh.PointStruct(0,0,zstep))
87 newfaces = [] # list for keeping created top faces
90 for i in range(0,nbzsteps):
91 mesh.ExtrusionSweep(faces,dir3,1)
92 # find top faces after each extrusion and keep them
93 res = mesh.GetLastCreatedElems()
97 nbn = mesh.GetElemNbNodes(j)
99 nn1 = mesh.GetElemNode(j,0)
100 xyz1 = mesh.GetNodeXYZ(nn1)
101 nn2 = mesh.GetElemNode(j,1)
102 xyz2 = mesh.GetNodeXYZ(nn2)
103 nn3 = mesh.GetElemNode(j,2)
104 xyz3 = mesh.GetNodeXYZ(nn3)
105 if abs(xyz1[2]-xyz2[2])<tol and abs(xyz1[2]-xyz3[2])<tol :
106 # this face is a top face
111 print "len(nfaces)!=nbf"
113 newfaces.append(nfaces)
114 # update faces for before next step of extrusion
118 # rotate faces from newfaces
119 axisr1 = smesh.AxisStruct(0,0,0,0,0,1)
120 for i in range(0,nbzsteps):
121 ang = maxang*(1-math.cos((i+1)*math.pi/nbzsteps))
122 mesh.Rotate(newfaces[i],axisr1,ang,0)
126 # create two edges and rotate them for creation
128 n5 = mesh.AddNode(65,0,0)
129 n6 = mesh.AddNode(67.5,0,0)
130 n7 = mesh.AddNode(70,0,0)
131 e56 = mesh.AddEdge([n5,n6])
132 e67 = mesh.AddEdge([n6,n7])
133 axisr2 = smesh.AxisStruct(65,0,0,0,1,0)
134 mesh.RotationSweep([e56,e67],axisr2, math.pi/6, 12, tol)
135 res = mesh.GetLastCreatedElems()
138 nbn = mesh.GetElemNbNodes(i)
139 if nbn>2: faces1.append(i)
143 # create other two edges and rotate them for creation
145 n8 = mesh.AddNode(-65,0,0)
146 n9 = mesh.AddNode(-67.5,0,0)
147 n10 = mesh.AddNode(-70,0,0)
148 e8 = mesh.AddEdge([n8,n9])
149 e9 = mesh.AddEdge([n9,n10])
150 axisr3 = smesh.AxisStruct(-65,0,0,0,-1,0)
151 mesh.RotationSweep([e8,e9],axisr3, math.pi/6, 12, tol)
152 res = mesh.GetLastCreatedElems()
155 nbn = mesh.GetElemNbNodes(i)
156 if nbn>2: faces2.append(i)
160 # there are coincident nodes after rotation
161 # therefore we have to merge nodes
162 nodes = mesh.FindCoincidentNodes(0.001)
163 mesh.MergeNodes(nodes)
167 nbrs = nbcircs*nbrsteps
168 dz = nbzsteps*zstep/nbrs
170 # create first spiral
172 newnodes = GetNewNodes(mesh,faces1,oldnodes)
176 mesh.RotationSweep(faces1,axisr1, math.pi*2/nbrsteps, nbrs, tol)
177 res = mesh.GetLastCreatedElems()
179 for i in range(0,nbrs):
181 for j in range(0,nbf1): volumes.append(res[i+j*nbrs])
182 newnodes = GetNewNodes(mesh,volumes,oldnodes)
184 xyz = mesh.GetNodeXYZ(j)
185 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
190 # create second spiral
192 newnodes = GetNewNodes(mesh,faces2,oldnodes)
196 mesh.RotationSweep(faces2,axisr1, math.pi*2/nbrsteps, nbrs, tol)
197 res = mesh.GetLastCreatedElems()
199 for i in range(0,nbrs):
201 for j in range(0,nbf2): volumes.append(res[i+j*nbrs])
202 newnodes = GetNewNodes(mesh,volumes,oldnodes)
204 xyz = mesh.GetNodeXYZ(j)
205 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
210 smesh.salome.sg.updateObjBrowser(1)