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83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
# Extrusion
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# There is a series of Extrusion Along Line methods added at different times;
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# a fully functional method is ExtrusionSweepObjects()
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import math
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import salome
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salome.salome_init_without_session()
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import SMESH
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from salome.smesh import smeshBuilder
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smesh_builder = smeshBuilder.New()
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# create an empty mesh
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mesh = smesh_builder.Mesh()
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# add a node
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mesh.AddNode( 0.,0.,0. )
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# extrude a node into a line of 10 segments along the X axis
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ids = mesh.GetNodesId()
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stepVector = [1.,0.,0.]
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nbSteps = 10
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mesh.ExtrusionSweep( ids, stepVector, nbSteps, IsNodes=True )
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# create some groups
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lastNode = mesh.GetNodesId()[-1]
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lastNodeGroup = mesh.MakeGroupByIds( "node %s"% lastNode, SMESH.NODE, [lastNode])
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lineGroup = mesh.MakeGroupByIds( "line", SMESH.EDGE, mesh.GetElementsId() )
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# rotate the segments around the first node to get a mesh of a disk quarter
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axisZ = [0.,0.,0., 0.,0.,1.]
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groups = mesh.RotationSweepObject( lineGroup, axisZ, math.pi/2., 10, 1e-3, MakeGroups=True, TotalAngle=True )
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# extrude all faces into volumes
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obj = mesh
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stepVector = [0.,0.,-1.]
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nbSteps = 5
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groups = mesh.ExtrusionSweepObject2D( obj, stepVector, nbSteps, MakeGroups=True )
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# remove all segments created by the last command
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for g in groups:
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if g.GetType() == SMESH.EDGE:
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mesh.RemoveGroupWithContents( g )
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# extrude all segments into faces along Z
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obj = mesh
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stepVector = [0.,0.,1.]
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mesh.ExtrusionSweepObject1D( obj, stepVector, nbSteps )
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# extrude a group
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obj = mesh.GetGroupByName( "line_extruded", SMESH.FACE )[0]
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stepVector = [0,-5.,0.]
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nbSteps = 1
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mesh.ExtrusionSweepObject( obj, stepVector, nbSteps )
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# extrude all nodes and triangle faces of the disk quarter, applying a scale factor
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diskGroup = mesh.GetGroupByName( "line_rotated", SMESH.FACE )[0]
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crit = [ smesh_builder.GetCriterion( SMESH.FACE, SMESH.FT_ElemGeomType,'=',SMESH.Geom_TRIANGLE ),
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smesh_builder.GetCriterion( SMESH.FACE, SMESH.FT_BelongToMeshGroup,'=', diskGroup )]
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trianglesFilter = smesh_builder.GetFilterFromCriteria( crit )
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nodes = [ diskGroup ]
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edges = []
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faces = [ trianglesFilter ]
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stepVector = [0,0,1]
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nbSteps = 10
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mesh.ExtrusionSweepObjects( nodes, edges, faces, stepVector, nbSteps, scaleFactors=[0.5], linearVariation=True )
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# extrude a cylindrical group of faces by normal
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cylGroup = None
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for g in mesh.GetGroups( SMESH.FACE ):
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if g.GetName().startswith("node "):
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cylGroup = g
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break
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elements = cylGroup
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stepSize = 5.
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nbSteps = 2
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mesh.ExtrusionByNormal( elements, stepSize, nbSteps )
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