1 # Copyright (C) 2005 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
2 # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
4 # This library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License.
9 # This library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with this library; if not, write to the Free Software
16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 def GetNewNodes(mesh,Elems,OldNodes):
25 Auxilary function, which return list of nodes from
26 given Elems avoided nodes from OldNodes
30 nbn = mesh.GetElemNbNodes(i)
31 for j in range(0,nbn):
32 nn = mesh.GetElemNode(i,j)
34 for k in range(0,len(newnodes)):
40 for k in range(0,len(OldNodes)):
57 # create a cross from quadrangle faces
58 # 1. create first edge and make extrusion along 0x
59 n1 = mesh.AddNode(55,-5,0)
60 n2 = mesh.AddNode(55,5,0)
61 e1 = mesh.AddEdge([n1,n2])
62 dir1 = smesh.DirStruct(smesh.PointStruct(-10,0,0))
63 mesh.ExtrusionSweep([e1],dir1,11)
64 # 2. create second edge and make extrusion along 0y
65 n3 = mesh.AddNode(-5,-55,0)
66 n4 = mesh.AddNode(5,-55,0)
67 e2 = mesh.AddEdge([n3,n4])
68 dir2 = smesh.DirStruct(smesh.PointStruct(0,10,0))
69 mesh.ExtrusionSweep([e2],dir2,11)
71 # since result has coincident nodes and faces
72 # we have to make merge
73 nodes = mesh.FindCoincidentNodes(0.001)
74 mesh.MergeNodes(nodes)
75 mesh.MergeEqualElements()
77 # make extrusion faces along 0z
78 faces = mesh.GetElementsByType(smesh.FACE)
83 dir3 = smesh.DirStruct(smesh.PointStruct(0,0,zstep))
84 newfaces = [] # list for keeping created top faces
87 for i in range(0,nbzsteps):
88 mesh.ExtrusionSweep(faces,dir3,1)
89 # find top faces after each extrusion and keep them
90 res = mesh.GetLastCreatedElems()
94 nbn = mesh.GetElemNbNodes(j)
96 nn1 = mesh.GetElemNode(j,0)
97 xyz1 = mesh.GetNodeXYZ(nn1)
98 nn2 = mesh.GetElemNode(j,1)
99 xyz2 = mesh.GetNodeXYZ(nn2)
100 nn3 = mesh.GetElemNode(j,2)
101 xyz3 = mesh.GetNodeXYZ(nn3)
102 if abs(xyz1[2]-xyz2[2])<tol and abs(xyz1[2]-xyz3[2])<tol :
103 # this face is a top face
108 print "len(nfaces)!=nbf"
110 newfaces.append(nfaces)
111 # update faces for before next step of extrusion
115 # rotate faces from newfaces
116 axisr1 = smesh.AxisStruct(0,0,0,0,0,1)
117 for i in range(0,nbzsteps):
118 ang = maxang*(1-math.cos((i+1)*math.pi/nbzsteps))
119 mesh.Rotate(newfaces[i],axisr1,ang,0)
123 # create two edges and rotate them for creation
125 n5 = mesh.AddNode(65,0,0)
126 n6 = mesh.AddNode(67.5,0,0)
127 n7 = mesh.AddNode(70,0,0)
128 e56 = mesh.AddEdge([n5,n6])
129 e67 = mesh.AddEdge([n6,n7])
130 axisr2 = smesh.AxisStruct(65,0,0,0,1,0)
131 mesh.RotationSweep([e56,e67],axisr2, math.pi/6, 12, tol)
132 res = mesh.GetLastCreatedElems()
135 nbn = mesh.GetElemNbNodes(i)
136 if nbn>2: faces1.append(i)
140 # create other two edges and rotate them for creation
142 n8 = mesh.AddNode(-65,0,0)
143 n9 = mesh.AddNode(-67.5,0,0)
144 n10 = mesh.AddNode(-70,0,0)
145 e8 = mesh.AddEdge([n8,n9])
146 e9 = mesh.AddEdge([n9,n10])
147 axisr3 = smesh.AxisStruct(-65,0,0,0,-1,0)
148 mesh.RotationSweep([e8,e9],axisr3, math.pi/6, 12, tol)
149 res = mesh.GetLastCreatedElems()
152 nbn = mesh.GetElemNbNodes(i)
153 if nbn>2: faces2.append(i)
157 # there are coincident nodes after rotation
158 # therefore we have to merge nodes
159 nodes = mesh.FindCoincidentNodes(0.001)
160 mesh.MergeNodes(nodes)
164 nbrs = nbcircs*nbrsteps
165 dz = nbzsteps*zstep/nbrs
167 # create first spiral
169 newnodes = GetNewNodes(mesh,faces1,oldnodes)
173 mesh.RotationSweep(faces1,axisr1, math.pi*2/nbrsteps, nbrs, tol)
174 res = mesh.GetLastCreatedElems()
176 for i in range(0,nbrs):
178 for j in range(0,nbf1): volumes.append(res[i+j*nbrs])
179 newnodes = GetNewNodes(mesh,volumes,oldnodes)
181 xyz = mesh.GetNodeXYZ(j)
182 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
187 # create second spiral
189 newnodes = GetNewNodes(mesh,faces2,oldnodes)
193 mesh.RotationSweep(faces2,axisr1, math.pi*2/nbrsteps, nbrs, tol)
194 res = mesh.GetLastCreatedElems()
196 for i in range(0,nbrs):
198 for j in range(0,nbf2): volumes.append(res[i+j*nbrs])
199 newnodes = GetNewNodes(mesh,volumes,oldnodes)
201 xyz = mesh.GetNodeXYZ(j)
202 mesh.MoveNode(j,xyz[0],xyz[1],xyz[2]+dz*(i+1))
207 smesh.salome.sg.updateObjBrowser(1)