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<h1>Creating Meshes</h1>
<h3><a name=bookmark>Construction of a Mesh</a></h3>
<p class="whs1">import salome</p>
<p class="whs1">import geompy</p>
<p class="whs1">import StdMeshers</p>
<p class="whs1">smesh = salome.lcc.FindOrLoadComponent("FactoryServer",
"SMESH")</p>
<p class="whs1">smeshgui = salome.ImportComponentGUI("SMESH")</p>
<p class="whs1">smeshgui.Init(salome.myStudyId);</p>
<p class="whs2"> </p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBox(0.,
0., 0., 100., 200., 300.)</p>
<p class="whs2"> </p>
<p class="whs2"># add box to the study</p>
<p class="whs1">idbox = geompy.addToStudy(box,
"box")</p>
<p class="whs2"> </p>
<p class="whs2"># create a hypothesis</p>
<p class="whs1">print "--------------------------
create Hypothesis"</p>
<p class="whs1">print "--------------------------
NumberOfSegments"</p>
<p class="whs1">numberOfSegments
= 7</p>
<p class="whs1">hypNbSeg = smesh.CreateHypothesis("NumberOfSegments",
"libStdMeshersEngine.so")</p>
<p class="whs1">hypNbSeg.SetNumberOfSegments(numberOfSegments)</p>
<p class="whs1">print hypNbSeg.GetName()</p>
<p class="whs1">print hypNbSeg.GetId()</p>
<p class="whs1">print hypNbSeg.GetNumberOfSegments()</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(hypNbSeg),
"NumberOfSegments_10")</p>
<p class="whs1">print "--------------------------
MaxElementArea"</p>
<p class="whs1">maxElementArea =
800</p>
<p class="whs1">hypArea = smesh.CreateHypothesis("MaxElementArea",
"libStdMeshersEngine.so")</p>
<p class="whs1">hypArea.SetMaxElementArea(maxElementArea)</p>
<p class="whs1">print hypArea.GetName()</p>
<p class="whs1">print hypArea.GetId()</p>
<p class="whs1">print hypArea.GetMaxElementArea()</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(hypArea),
"MaxElementArea_500")</p>
<p class="whs1">print "--------------------------
MaxElementVolume"</p>
<p class="whs1">maxElementVolume
= 900</p>
<p class="whs1">hypVolume = smesh.CreateHypothesis("MaxElementVolume",
"libStdMeshersEngine.so")</p>
<p class="whs1">hypVolume.SetMaxElementVolume(maxElementVolume)</p>
<p class="whs1">print hypVolume.GetName()</p>
<p class="whs1">print hypVolume.GetId()</p>
<p class="whs1">print hypVolume.GetMaxElementVolume()</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(hypVolume),
"MaxElementVolume_500")</p>
<p class="whs2"> </p>
<p class="whs2"># create algorithms</p>
<p class="whs1">print "--------------------------
create Algorithms"</p>
<p class="whs1">print "--------------------------
Regular_1D"</p>
<p class="whs1">regular1D = smesh.CreateHypothesis("Regular_1D",
"libStdMeshersEngine.so")</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(regular1D),
"Wire Discretisation")</p>
<p class="whs1">print "--------------------------
MEFISTO_2D"</p>
<p class="whs1">mefisto2D = smesh.CreateHypothesis("MEFISTO_2D",
"libStdMeshersEngine.so")</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(mefisto2D),
"MEFISTO_2D")</p>
<p class="whs2"> </p>
<p class="whs2"># initialize a mesh with
the box</p>
<p class="whs1">mesh = smesh.CreateMesh(box)</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(mesh),
"MeshBox")</p>
<p class="whs2"> </p>
<p class="whs2"># add the hypothesis to
the box</p>
<p class="whs1">print "--------------------------
add hypothesis to the box"</p>
<p class="whs1">mesh.AddHypothesis(box,hypNbSeg)</p>
<p class="whs1">mesh.AddHypothesis(box,hypArea)</p>
<p class="whs1">mesh.AddHypothesis(box,hypVolume)</p>
<p class="whs1">mesh.AddHypothesis(box,regular1D)</p>
<p class="whs1">mesh.AddHypothesis(box,mefisto2D)</p>
<p class="whs2"> </p>
<p class="whs2"># compute the mesh</p>
<p class="whs1">print "--------------------------
compute the mesh of the box"</p>
<p class="whs1">ret = smesh.Compute(mesh,box)</p>
<p class="whs1">print ret</p>
<p class="whs1">if ret == 0:</p>
<p class="whs1"> print
"probleme when computing the mesh"</p>
<p class="whs1">salome.sg.updateObjBrowser(1)</p>
<p class="whs1"> </p>
<h3><a name=bookmark1>Construction of a Submesh</a></h3>
<p class="whs3"> </p>
<p class="whs3"><span style="font-family: 'Lucida Console', monospace;">from
geompy import *</span></p>
<p class="whs3">import smesh</p>
<p class="whs4"> </p>
<p class="whs4"># create vertices</p>
<p class="whs3">Point111 = MakeVertex( 0, 0,
0)</p>
<p class="whs3">Point211 = MakeVertex(10, 0,
0)</p>
<p class="whs3">Point121 = MakeVertex( 0, 10, 0)</p>
<p class="whs3">Point221 = MakeVertex(10, 10, 0)</p>
<p class="whs3">Point112 = MakeVertex( 0, 0,
10)</p>
<p class="whs3">Point212 = MakeVertex(10, 0,
10)</p>
<p class="whs3">Point122 = MakeVertex( 0, 10, 10)</p>
<p class="whs3">Point222 = MakeVertex(10, 10, 10)</p>
<p class="whs4"> </p>
<p class="whs4"># create edges</p>
<p class="whs3">EdgeX111 = MakeEdge(Point111, Point211)</p>
<p class="whs3">EdgeX121 = MakeEdge(Point121, Point221)</p>
<p class="whs3">EdgeX112 = MakeEdge(Point112, Point212)</p>
<p class="whs3">EdgeX122 = MakeEdge(Point122, Point222)</p>
<p class="whs3">EdgeY11 = MakeEdge(Point111, Point121)</p>
<p class="whs3">EdgeY21 = MakeEdge(Point211, Point221)</p>
<p class="whs3">EdgeY12 = MakeEdge(Point112, Point122)</p>
<p class="whs3">EdgeY22 = MakeEdge(Point212, Point222)</p>
<p class="whs3">EdgeZ111 = MakeEdge(Point111, Point112)</p>
<p class="whs3">EdgeZ211 = MakeEdge(Point211, Point212)</p>
<p class="whs3">EdgeZ121 = MakeEdge(Point121, Point122)</p>
<p class="whs3">EdgeZ221 = MakeEdge(Point221, Point222)</p>
<p class="whs4"> </p>
<p class="whs4"># create faces</p>
<p class="whs3">FaceX11 = MakeQuad(EdgeY11, EdgeZ111,
EdgeY12, EdgeZ121)</p>
<p class="whs3">FaceX21 = MakeQuad(EdgeY21, EdgeZ211,
EdgeY22, EdgeZ221)</p>
<p class="whs3">FaceY111 = MakeQuad(EdgeX111, EdgeZ111,
EdgeX112, EdgeZ211)</p>
<p class="whs3">FaceY121 = MakeQuad(EdgeX121, EdgeZ121,
EdgeX122, EdgeZ221)</p>
<p class="whs3">FaceZ11 = MakeQuad(EdgeX111, EdgeY11,
EdgeX121, EdgeY21)</p>
<p class="whs3">FaceZ12 = MakeQuad(EdgeX112, EdgeY12,
EdgeX122, EdgeY22)</p>
<p class="whs4"> </p>
<p class="whs4"># create a solid</p>
<p class="whs3">Block = MakeHexa(FaceX11, FaceX21, FaceY111,
FaceY121, FaceZ11, FaceZ12)</p>
<p class="whs4"> </p>
<p class="whs4"># create a compound</p>
<p class="whs3">box = MakeCompound([Block])</p>
<p class="whs4"> </p>
<p class="whs4"># add in the study</p>
<p class="whs3">box_id = addToStudy(box, "Box compound")</p>
<p class="whs4"> </p>
<p class="whs4"># create hexahedral mesh
on the box</p>
<p class="whs3">hexa = smesh.Mesh(box, "Box compound
: hexahedrical mesh")</p>
<p class="whs3">algo = hexa.Segment()</p>
<p class="whs4"> </p>
<p class="whs4"># define "NumberOfSegments"
hypothesis to cut the edge in a fixed number of segments</p>
<p class="whs3">algo.NumberOfSegments(4)</p>
<p class="whs4"> </p>
<p class="whs4"># creates a quadrangle
2D algorithm for the faces</p>
<p class="whs3">hexa.Quadrangle()</p>
<p class="whs4"> </p>
<p class="whs4"># construct a submesh with
a local hypothesis</p>
<p class="whs3">algo = hexa.Segment(EdgeX111)</p>
<p class="whs4"> </p>
<p class="whs4"># define "Arithmetic1D"
hypothesis to cut an edge in several segments with increasing arithmetic
length </p>
<p class="whs3">algo.Arithmetic1D(1, 4)</p>
<p class="whs4"> </p>
<p class="whs4"># define "Propagation"
hypothesis that propagates all other hypothesis on all edges on the opposite
side in case of quadrangular faces</p>
<p class="whs3">algo.Propagation()</p>
<p class="whs4"> </p>
<p class="whs4"># compute the mesh</p>
<p class="whs3">hexa.Compute() </p>
<p class="whs3"> </p>
<h3><a name=bookmark2>Editing of a mesh</a></h3>
<p class="whs3"> </p>
<p class="whs3"><span style="font-family: 'Lucida Console', monospace;">import
salome</span></p>
<p class="whs3">import geompy</p>
<p class="whs3">import SMESH</p>
<p class="whs3">import StdMeshers</p>
<p class="whs3"> </p>
<p class="whs3">smesh = salome.lcc.FindOrLoadComponent("FactoryServer",
"SMESH")</p>
<p class="whs3">smesh.SetCurrentStudy(salome.myStudy)</p>
<p class="whs3"> </p>
<p class="whs3">box =
geompy.MakeBox(0., 0., 0., 20., 20., 20.)</p>
<p class="whs3">idbox = geompy.addToStudy(box, "box")</p>
<p class="whs3"> </p>
<p class="whs3">subShapeList = geompy.SubShapeAll(box,
geompy.ShapeType["EDGE"])</p>
<p class="whs3">edge =
subShapeList[0]</p>
<p class="whs3">name =
geompy.SubShapeName(edge, box)</p>
<p class="whs3">idedge = geompy.addToStudyInFather(box,
edge, name)</p>
<p class="whs3"> </p>
<p class="whs3">box =
salome.IDToObject(idbox)</p>
<p class="whs3">edge = salome.IDToObject(idedge)</p>
<p class="whs3"> </p>
<p class="whs3">hyp1 = smesh.CreateHypothesis("NumberOfSegments",
"libStdMeshersEngine.so")</p>
<p class="whs3">hyp1.SetNumberOfSegments(3)</p>
<p class="whs3">hyp2 = smesh.CreateHypothesis("MaxElementArea",
"libStdMeshersEngine.so")</p>
<p class="whs3">hyp2.SetMaxElementArea(10)</p>
<p class="whs3">hyp3 = smesh.CreateHypothesis("Arithmetic1D",
"libStdMeshersEngine.so")</p>
<p class="whs3">hyp3.SetLength(1,1)</p>
<p class="whs3">hyp3.SetLength(6,0)</p>
<p class="whs3">hyp4 = smesh.CreateHypothesis("Propagation",
"libStdMeshersEngine.so")</p>
<p class="whs3"> </p>
<p class="whs3">algo1 = smesh.CreateHypothesis("Regular_1D",
"libStdMeshersEngine.so")</p>
<p class="whs3">algo2 = smesh.CreateHypothesis("MEFISTO_2D",
"libStdMeshersEngine.so")</p>
<p class="whs3"> </p>
<p class="whs3">mesh = smesh.CreateMesh(box)</p>
<p class="whs3">mesh.AddHypothesis(box,hyp1)</p>
<p class="whs3">mesh.AddHypothesis(box,hyp2)</p>
<p class="whs3">mesh.AddHypothesis(box,algo1)</p>
<p class="whs3">mesh.AddHypothesis(box,algo2)</p>
<p class="whs3">mesh.AddHypothesis(edge,hyp3)</p>
<p class="whs3">mesh.AddHypothesis(edge,hyp4)</p>
<p class="whs3">mesh.AddHypothesis(edge,algo1)</p>
<p class="whs3"> </p>
<p class="whs3">smesh.Compute(mesh,box)</p>
<p class="whs3">salome.sg.updateObjBrowser(1)</p>
<p class="whs3"> </p>
<p class="whs5"># remove a hypothesis</p>
<p class="whs3">mesh.RemoveHypothesis(edge,hyp4)</p>
<p class="whs3"> </p>
<p class="whs3">smesh.Compute(mesh,box)</p>
<p class="whs3">salome.sg.updateObjBrowser(1)</p>
<p class="whs3"> </p>
<p class="whs5"># change the value
of the hypothesis</p>
<p class="whs3">hyp2.SetMaxElementArea(2)</p>
<p class="whs3">mesh.AddHypothesis(box,hyp2)</p>
<p class="whs3"> </p>
<p class="whs3">smesh.Compute(mesh,box)</p>
<p class="whs3">salome.sg.updateObjBrowser(1) </p>
<p class="whs4"> </p>
<h3><a name=bookmark3>Export of a Mesh</a></h3>
<p class="whs4"> </p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
salome</span></p>
<p class="whs1">import geompy</p>
<p class="whs1">import StdMeshers</p>
<p class="whs1">smesh = salome.lcc.FindOrLoadComponent("FactoryServer",
"SMESH")</p>
<p class="whs1">smeshgui = salome.ImportComponentGUI("SMESH")</p>
<p class="whs1">smeshgui.Init(salome.myStudyId);</p>
<p class="whs2"> </p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBox(0.,
0., 0., 100., 200., 300.)</p>
<p class="whs2"> </p>
<p class="whs2"># add the box to the study</p>
<p class="whs1">idbox = geompy.addToStudy(box,
"box")</p>
<p class="whs2"> </p>
<p class="whs2"># create a hypothesis</p>
<p class="whs1">print "--------------------------
create Hypothesis"</p>
<p class="whs1">print "--------------------------
NumberOfSegments"</p>
<p class="whs1">numberOfSegments
= 7</p>
<p class="whs1">hypNbSeg = smesh.CreateHypothesis("NumberOfSegments",
"libStdMeshersEngine.so")</p>
<p class="whs1">hypNbSeg.SetNumberOfSegments(numberOfSegments)</p>
<p class="whs1">print hypNbSeg.GetName()</p>
<p class="whs1">print hypNbSeg.GetId()</p>
<p class="whs1">print hypNbSeg.GetNumberOfSegments()</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(hypNbSeg),
"NumberOfSegments_10")</p>
<p class="whs1">print "--------------------------
MaxElementArea"</p>
<p class="whs1">maxElementArea =
800</p>
<p class="whs1">hypArea = smesh.CreateHypothesis("MaxElementArea",
"libStdMeshersEngine.so")</p>
<p class="whs1">hypArea.SetMaxElementArea(maxElementArea)</p>
<p class="whs1">print hypArea.GetName()</p>
<p class="whs1">print hypArea.GetId()</p>
<p class="whs1">print hypArea.GetMaxElementArea()</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(hypArea),
"MaxElementArea_500")</p>
<p class="whs1">print "--------------------------
MaxElementVolume"</p>
<p class="whs1">maxElementVolume
= 900</p>
<p class="whs1">hypVolume = smesh.CreateHypothesis("MaxElementVolume",
"libStdMeshersEngine.so")</p>
<p class="whs1">hypVolume.SetMaxElementVolume(maxElementVolume)</p>
<p class="whs1">print hypVolume.GetName()</p>
<p class="whs1">print hypVolume.GetId()</p>
<p class="whs1">print hypVolume.GetMaxElementVolume()</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(hypVolume),
"MaxElementVolume_500")</p>
<p class="whs2"> </p>
<p class="whs2"># create algorithms</p>
<p class="whs1">print "--------------------------
create Algorithms"</p>
<p class="whs1">print "--------------------------
Regular_1D"</p>
<p class="whs1">regular1D = smesh.CreateHypothesis("Regular_1D",
"libStdMeshersEngine.so")</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(regular1D),
"Wire Discretisation")</p>
<p class="whs1">print "--------------------------
MEFISTO_2D"</p>
<p class="whs1">mefisto2D = smesh.CreateHypothesis("MEFISTO_2D",
"libStdMeshersEngine.so")</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(mefisto2D),
"MEFISTO_2D")</p>
<p class="whs2"> </p>
<p class="whs2"># initialize a mesh with
the box</p>
<p class="whs1">mesh = smesh.CreateMesh(box)</p>
<p class="whs1">smeshgui.SetName(salome.ObjectToID(mesh),
"MeshBox")</p>
<p class="whs1"> </p>
<p class="whs2"># add the hypothesis to
the box</p>
<p class="whs1">print "--------------------------
add hypothesis to the box"</p>
<p class="whs1">mesh.AddHypothesis(box,hypNbSeg)</p>
<p class="whs1">mesh.AddHypothesis(box,hypArea)</p>
<p class="whs1">mesh.AddHypothesis(box,hypVolume)</p>
<p class="whs1">mesh.AddHypothesis(box,regular1D)</p>
<p class="whs1">mesh.AddHypothesis(box,mefisto2D)</p>
<p class="whs2"> </p>
<p class="whs2"># compute the mesh</p>
<p class="whs1">print "--------------------------
compute the mesh of the box"</p>
<p class="whs1">ret = smesh.Compute(mesh,box)</p>
<p class="whs1">print ret</p>
<p class="whs1">if ret == 0:</p>
<p class="whs1"> print
"probleme when computing the mesh"</p>
<p class="whs1">salome.sg.updateObjBrowser(1)</p>
<p class="whs1">mesh.ExportMED("/tmp/meshMED.med",0)</p>
<p class="whs2"> </p>
<p class="whs4"> </p>
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