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<h1>Transforming Meshes</h1>
<h3 class="whs1">Transforming Meshes</h3>
<h4 class="whs2"> </h4>
<h4 class="whs2"><a name=bookmark>Translation</a></h4>
<p class="whs3"> </p>
<p class="whs4">import SMESH_mechanic</p>
<p class="whs4"> </p>
<p class="whs4"><span style="font-family: 'Lucida Console', monospace;">smesh
= SMESH_mechanic.smesh </span></p>
<p class="whs4">mesh = SMESH_mechanic.mesh
</p>
<p class="whs4"> </p>
<p class="whs5"># define translation
vector</p>
<p class="whs4"><span style="font-family: 'Lucida Console', monospace;">point
= smesh.PointStruct(-150., -150., 0.)</span></p>
<p class="whs4">vector =smesh.DirStruct(point)
</p>
<p class="whs4"> </p>
<p class="whs5"># translate a mesh</p>
<p class="whs4">doCopy = 1</p>
<p class="whs4"> </p>
<p class="whs4">mesh.Translate([],
vector, doCopy) </p>
<p class="whs6"> </p>
<h4 class="whs2"><a name=bookmark1>Rotation</a></h4>
<p class="whs3"> </p>
<p class="whs3">import math</p>
<p class="whs3">import SMESH_mechanic</p>
<p class="whs3"> </p>
<p class="whs3"><span style="font-family: 'Lucida Console', monospace;">smesh
= SMESH_mechanic.smesh</span></p>
<p class="whs3">mesh = SMESH_mechanic.mesh </p>
<p class="whs3"> </p>
<p class="whs5"># define rotation axis
and angle</p>
<p class="whs3">axisXYZ = smesh.AxisStruct(0., 0., 0.,
5., 5., 20.)</p>
<p class="whs3">angle270 = 1.5 * math.pi</p>
<p class="whs3"> </p>
<p class="whs5"># rotate a mesh</p>
<p class="whs4">mesh.Rotate([],
axisXYZ, angle270, 1) </p>
<p class="whs6"> </p>
<h4 class="whs2"><a name=bookmark2>Symmetry</a></h4>
<p class="whs3"> </p>
<p class="whs3">import math</p>
<p class="whs3"> </p>
<p class="whs3">import SMESH_mechanic</p>
<p class="whs3"> </p>
<p class="whs3"><span style="font-family: 'Lucida Console', monospace;">smesh
= SMESH_mechanic.smesh</span></p>
<p class="whs3">mesh = SMESH_mechanic.mesh </p>
<p class="whs3"> </p>
<p class="whs5"># create a symmetrical
copy of the mesh mirrored through a point</p>
<p class="whs3">axis = SMESH.AxisStruct(0, 0, 0, 0, 0,
0)</p>
<p class="whs3"> </p>
<p class="whs3">mesh.Mirror([], axis, smesh.POINT, 1)
</p>
<p class="whs6"> </p>
<h4 class="whs2"><a name=bookmark3>Merging
Nodes</a></h4>
<p class="whs3"> </p>
<p class="whs4">import SMESH_mechanic</p>
<p class="whs4">mesh = SMESH_mechanic.mesh</p>
<p class="whs4"> </p>
<p class="whs5"># merge nodes</p>
<p class="whs4">Tolerance = 25.0</p>
<p class="whs4"> </p>
<p class="whs4">GroupsOfNodes =
mesh.FindCoincidentNodes(Tolerance)</p>
<p class="whs4">mesh.MergeNodes(GroupsOfNodes)
</p>
<p class="whs6"> </p>
<h4><a name=bookmark8>Merging Elements</a></h4>
<p class="whs4">import salome</p>
<p class="whs4">import geompy</p>
<p class="whs4">import smesh</p>
<p class="whs4"> </p>
<p class="whs5"># create a face to
be meshed</p>
<p class="whs4">px = geompy.MakeVertex(100.,
0. , 0.
)</p>
<p class="whs4">py = geompy.MakeVertex(0.
, 100.,
0. )</p>
<p class="whs4">pz = geompy.MakeVertex(0.
, 0. ,
100.)</p>
<p class="whs4"> </p>
<p class="whs4">vxy = geompy.MakeVector(px,
py)</p>
<p class="whs4">arc = geompy.MakeArc(py,
pz, px)</p>
<p class="whs4"> </p>
<p class="whs4">wire = geompy.MakeWire([vxy,
arc])</p>
<p class="whs4">isPlanarFace = 1</p>
<p class="whs4"> </p>
<p class="whs4">face1 = geompy.MakeFace(wire,
isPlanarFace)</p>
<p class="whs4">id_face1 = geompy.addToStudy(face1,
"Face1")</p>
<p class="whs4"> </p>
<p class="whs5"># create a circle to
be an extrusion path</p>
<p class="whs4">px1 = geompy.MakeVertex(
100., 100.,
0.)</p>
<p class="whs4">py1 = geompy.MakeVertex(-100.,
-100., 0.)</p>
<p class="whs4">pz1 = geompy.MakeVertex(
0.,
0.,
50.)</p>
<p class="whs4"> </p>
<p class="whs4">circle = geompy.MakeCircleThreePnt(py1,
pz1, px1)</p>
<p class="whs4">id_circle = geompy.addToStudy(circle,
"Path")</p>
<p class="whs4"> </p>
<p class="whs5"># create a 2D mesh
on the face</p>
<p class="whs4">trias = smesh.Mesh(face1,
"Face : 2D mesh")</p>
<p class="whs4"> </p>
<p class="whs4">algo1D = trias.Segment()</p>
<p class="whs4">algo1D.NumberOfSegments(6)</p>
<p class="whs4">algo2D = trias.Triangle()</p>
<p class="whs4">algo2D.LengthFromEdges()</p>
<p class="whs4"> </p>
<p class="whs4">trias.Compute()</p>
<p class="whs5"> </p>
<p class="whs5"># create a path mesh</p>
<p class="whs4">circlemesh = smesh.Mesh(circle,
"Path mesh")</p>
<p class="whs4">algo = circlemesh.Segment()</p>
<p class="whs4">algo.NumberOfSegments(10)</p>
<p class="whs4">circlemesh.Compute()</p>
<p class="whs5"> </p>
<p class="whs5"># extrusion of the
mesh</p>
<p class="whs4"><span style="font-family: 'Lucida Console', monospace;">trias.ExtrusionAlongPath([],
circlemesh, circle,</span></p>
<p class="whs4"> 1,
0, [], 0, smesh.PointStruct(0, 0, 0))</p>
<p class="whs4"> </p>
<p class="whs5"># merge nodes</p>
<p class="whs4">print "Number
of nodes before MergeNodes:", </p>
<p class="whs4">trias.NbNodes()</p>
<p class="whs4">tolerance = 0.001</p>
<p class="whs4">array_of_nodes_groups
= trias.FindCoincidentNodes(tolerance)</p>
<p class="whs4"> </p>
<p class="whs4">trias.MergeNodes(array_of_nodes_groups)</p>
<p class="whs4"> </p>
<p class="whs4">print "Number
of nodes after MergeNodes:", trias.NbNodes()</p>
<p class="whs4">print ""</p>
<p class="whs4">print "Number
of elements before MergeEqualElements:"</p>
<p class="whs4">print "Edges
:
", trias.NbEdges()</p>
<p class="whs4">print "Triangles
: ",
trias.NbTriangles()</p>
<p class="whs4">print "Quadrangles:
", trias.NbQuadrangles()</p>
<p class="whs4">print "Volumes
:
", trias.NbVolumes()</p>
<p class="whs4"> </p>
<p class="whs5"># merge elements</p>
<p class="whs4">trias.MergeEqualElements()</p>
<p class="whs4">print "Number
of elements after MergeEqualElements:"</p>
<p class="whs4">print "Edges
:
", trias.NbEdges()</p>
<p class="whs4">print "Triangles
: ",
trias.NbTriangles()</p>
<p class="whs4">print "Quadrangles:
", trias.NbQuadrangles()</p>
<p class="whs4">print "Volumes
:
", trias.NbVolumes()</p>
<p class="whs4"> </p>
<p class="whs4">salome.sg.updateObjBrowser(1)
</p>
<p class="whs4"> </p>
<h3>Sewing Meshes</h3>
<h4><a name=bookmark4>Sew Meshes Border to Border</a></h4>
<p class="whs4">import geompy</p>
<p class="whs4">import smesh</p>
<p class="whs4"> </p>
<p class="whs5"># create two faces
of a box</p>
<p class="whs4">box1 = geompy.MakeBox(0.,
0., -10., 30., 20., 25.)</p>
<p class="whs4">facesList1 = geompy.SubShapeAll(box1,
geompy.ShapeType["FACE"])</p>
<p class="whs4">face1 = facesList1[2]</p>
<p class="whs4"> </p>
<p class="whs4">box2 = geompy.MakeBox(0.,
5., 0., 20., 20., 15.)</p>
<p class="whs4">facesList2 = geompy.SubShapeAll(box2,
geompy.ShapeType["FACE"])</p>
<p class="whs4">face2 = facesList2[1]</p>
<p class="whs4"> </p>
<p class="whs4">edgesList = geompy.SubShapeAll(face2,
geompy.ShapeType["EDGE"])</p>
<p class="whs4">edge1 = edgesList[2]</p>
<p class="whs4"> </p>
<p class="whs4">aComp = geompy.MakeCompound([face1,
face2])</p>
<p class="whs4">geompy.addToStudy(aComp,
"Two faces")</p>
<p class="whs4"> </p>
<p class="whs5"># create a mesh on
two faces</p>
<p class="whs4">mesh = smesh.Mesh(aComp,
"Two faces : quadrangle mesh")</p>
<p class="whs4"> </p>
<p class="whs4">algo1D = mesh.Segment()</p>
<p class="whs4">algo1D.NumberOfSegments(9)</p>
<p class="whs4">algo2D = mesh.Quadrangle()</p>
<p class="whs4"> </p>
<p class="whs4">algo_local = mesh.Segment(edge1)</p>
<p class="whs4">algo_local.Arithmetic1D(1,
4)</p>
<p class="whs4">algo_local.Propagation()</p>
<p class="whs4"> </p>
<p class="whs4">mesh.Compute()</p>
<p class="whs4"> </p>
<p class="whs5"># sew border to side</p>
<p class="whs5"># FirstNodeIDOnFreeBorder,
SecondNodeIDOnFreeBorder, LastNodeIDOnFreeBorder,</p>
<p class="whs5"># FirstNodeIDOnSide,
LastNodeIDOnSide,</p>
<p class="whs5"># CreatePolygons, CreatePolyedrs</p>
<p class="whs4">mesh.SewBorderToSide(5,
45, 6, 113, 109, 0, 0) </p>
<h4><a name=bookmark5>Sew Conform Free Borders</a></h4>
<p class="whs4">import geompy</p>
<p class="whs4">import smesh</p>
<p class="whs4"> </p>
<p class="whs5"># create two faces
of the box</p>
<p class="whs4">box1 = geompy.MakeBox(0.,
0., -10., 20., 20., 15.)</p>
<p class="whs4">facesList1 = geompy.SubShapeAll(box1,
geompy.ShapeType["FACE"])</p>
<p class="whs4">face1 = facesList1[2]</p>
<p class="whs4"> </p>
<p class="whs4">box2 = geompy.MakeBox(0.,
5., 0., 20., 20., 15.)</p>
<p class="whs4">facesList2 = geompy.SubShapeAll(box2,
geompy.ShapeType["FACE"])</p>
<p class="whs4">face2 = facesList2[1]</p>
<p class="whs4"> </p>
<p class="whs4">edgesList = geompy.SubShapeAll(face2,
geompy.ShapeType["EDGE"])</p>
<p class="whs4">edge1 = edgesList[2]</p>
<p class="whs4"> </p>
<p class="whs4">aComp = geompy.MakeCompound([face1,
face2])</p>
<p class="whs4">geompy.addToStudy(aComp,
"Two faces")</p>
<p class="whs4"> </p>
<p class="whs5"># create a mesh on
two faces</p>
<p class="whs4">mesh = smesh.Mesh(aComp,
"Two faces : quadrangle mesh")</p>
<p class="whs4"> </p>
<p class="whs4">algo1D = mesh.Segment()</p>
<p class="whs4">algo1D.NumberOfSegments(9)</p>
<p class="whs4">algo2D = mesh.Quadrangle()</p>
<p class="whs4"> </p>
<p class="whs4">algo_local = mesh.Segment(edge1)</p>
<p class="whs4">algo_local.Arithmetic1D(1,
4)</p>
<p class="whs4">algo_local.Propagation()</p>
<p class="whs4"> </p>
<p class="whs4">mesh.Compute()</p>
<p class="whs4"> </p>
<p class="whs5"># sew conform free
borders</p>
<p class="whs5"># FirstNodeID1, SecondNodeID1,
LastNodeID1, FirstNodeID2, SecondNodeID2</p>
<p class="whs4">mesh.SewConformFreeBorders(5,
45, 6, 3, 24) </p>
<h4><a name=bookmark6>Sew Free Borders</a></h4>
<p class="whs4">import geompy</p>
<p class="whs4">import smesh</p>
<p class="whs4"> </p>
<p class="whs5"># create two faces
of the box</p>
<p class="whs4">box1 = geompy.MakeBox(0.,
0., 0., 20., 20., 15.)</p>
<p class="whs4">facesList1 = geompy.SubShapeAll(box1,
geompy.ShapeType["FACE"])</p>
<p class="whs4">face1 = facesList1[2]</p>
<p class="whs4"> </p>
<p class="whs4">box2 = geompy.MakeBox(0.,
5., 0., 20., 20., 15.)</p>
<p class="whs4">facesList2 = geompy.SubShapeAll(box2,
geompy.ShapeType["FACE"])</p>
<p class="whs4">face2 = facesList2[1]</p>
<p class="whs4"> </p>
<p class="whs4">edgesList = geompy.SubShapeAll(face2,
geompy.ShapeType["EDGE"])</p>
<p class="whs4">edge1 = edgesList[2]</p>
<p class="whs4"> </p>
<p class="whs4">aComp = geompy.MakeCompound([face1,
face2])</p>
<p class="whs4">geompy.addToStudy(aComp,
"Two faces")</p>
<p class="whs4"> </p>
<p class="whs5"># create a mesh on
two faces</p>
<p class="whs4">mesh = smesh.Mesh(aComp,
"Two faces : quadrangle mesh")</p>
<p class="whs4"> </p>
<p class="whs4">algo1D = mesh.Segment()</p>
<p class="whs4">algo1D.NumberOfSegments(4)</p>
<p class="whs4">algo2D = mesh.Quadrangle()</p>
<p class="whs4"> </p>
<p class="whs4">algo_local = mesh.Segment(edge1)</p>
<p class="whs4">algo_local.Arithmetic1D(1,
4)</p>
<p class="whs4">algo_local.Propagation()</p>
<p class="whs4"> </p>
<p class="whs4">mesh.Compute()</p>
<p class="whs4"> </p>
<p class="whs5"># sew free borders</p>
<p class="whs5"># FirstNodeID1, SecondNodeID1,
LastNodeID1,</p>
<p class="whs5"># FirstNodeID2, SecondNodeID2,
LastNodeID2, CreatePolygons, CreatePolyedrs</p>
<p class="whs6">mesh.SewFreeBorders(6,
21, 5, 1, 12, 3, 0, 0) </p>
<h4><a name=bookmark7>Sew Side Elements</a></h4>
<p class="whs4">import geompy</p>
<p class="whs4">import smesh</p>
<p class="whs4"> </p>
<p class="whs5"># create two boxes</p>
<p class="whs4">box1 = geompy.MakeBox(0.,
0., 0.,
10., 10., 10.)</p>
<p class="whs4">box2 = geompy.MakeBox(0.,
15., 0., 20., 25., 10.)</p>
<p class="whs4"> </p>
<p class="whs4">EdgesList = geompy.SubShapeAll(box2,
geompy.ShapeType["EDGE"])</p>
<p class="whs4"> </p>
<p class="whs4">aComp = geompy.MakeCompound([box1,
box2])</p>
<p class="whs4">geompy.addToStudy(aComp,
"Two boxes")</p>
<p class="whs4"> </p>
<p class="whs5"># create a mesh on
two boxes</p>
<p class="whs4">mesh = smesh.Mesh(aComp,
"Two faces : quadrangle mesh")</p>
<p class="whs4"> </p>
<p class="whs4">algo1D = mesh.Segment()</p>
<p class="whs4">algo1D.NumberOfSegments(2)</p>
<p class="whs4">algo2D = mesh.Quadrangle()</p>
<p class="whs4"> </p>
<p class="whs4">algo_local = mesh.Segment(EdgesList[8])</p>
<p class="whs4">algo_local.NumberOfSegments(4)</p>
<p class="whs4">algo_local.Propagation()</p>
<p class="whs4"> </p>
<p class="whs4">mesh.Compute()</p>
<p class="whs4"> </p>
<p class="whs5"># sew side elements</p>
<p class="whs5"># IDsOfSide1Elements,
IDsOfSide2Elements,</p>
<p class="whs5"># NodeID1OfSide1ToMerge,
NodeID1OfSide2ToMerge, NodeID2OfSide1ToMerge, NodeID2OfSide2ToMerge</p>
<p class="whs4">mesh.SewSideElements([69,
70, 71, 72], [91, 92, 89, 90], 8, 38, 23, 58) </p>
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