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https://git.salome-platform.org/gitpub/modules/smesh.git
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85 lines
2.7 KiB
Python
85 lines
2.7 KiB
Python
# Reorient faces
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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.geom import geomBuilder
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from salome.smesh import smeshBuilder
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geom_builder = geomBuilder.New()
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smesh_builder = smeshBuilder.New()
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# create a geometry consisting of two faces
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box = geom_builder.MakeBoxDXDYDZ( 10, 10, 10 )
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faces = geom_builder.SubShapeAllSorted( box, geom_builder.ShapeType["FACE"])
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shape = geom_builder.MakeCompound( faces[:2] )
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faces = geom_builder.SubShapeAll( shape, geom_builder.ShapeType["FACE"] )
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geom_builder.addToStudy( shape, "shape")
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geom_builder.addToStudyInFather( shape, faces[0], "faces[0]")
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geom_builder.addToStudyInFather( shape, faces[1], "faces[1]")
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# create a 2D mesh
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mesh = smesh_builder.Mesh( shape, "test_Reorient2D")
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mesh.AutomaticHexahedralization(0.5)
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localAlgo = mesh.Segment(faces[0])
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localAlgo.NumberOfSegments( 11 )
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if not mesh.Compute(): raise Exception("Error when computing Mesh")
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group = mesh.Group( faces[1] )
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vec = geom_builder.MakeVectorDXDYDZ( 1, 1, 1 )
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# ============
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# Reorient2D()
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# ============
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# Each of arguments of Reorient2D() function can be of different types:
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#
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# 2DObject - the whole mesh
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# Direction - a GEOM object (vector)
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# FaceOrPoint - an ID of face
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mesh.Reorient2D( mesh, vec, mesh.NbElements() )
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#
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# 2DObject - a sub-mesh
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# Direction - components of a vector
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# FaceOrPoint - a GEOM object (vertex)
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mesh.Reorient2D( localAlgo.GetSubMesh(), [ 1, -1, 1 ], geom_builder.GetFirstVertex( vec ))
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#
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# 2DObject - a group of faces
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# Direction - a SMESH.DirStruct structure
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# FaceOrPoint - coordinates of a point
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mesh.Reorient2D( group, smesh_builder.MakeDirStruct( -10, 1, 10 ), [0,0,0])
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#
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# FaceOrPoint - a SMESH.PointStruct structure
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mesh.Reorient2D( localAlgo.GetSubMesh().GetIDs(), [10,1,0], SMESH.PointStruct(0,0,0))
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# ========================
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# Reorient2DByNeighbours()
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# ========================
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# Use faces of 'group' as a reference to reorient equally all faces
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mesh.Reorient2DByNeighbours([mesh], [group])
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# Orient equally face on 'group', but not define which orientation is correct
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mesh.Reorient2DByNeighbours([group])
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# =================
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# Reorient2DBy3D()
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# =================
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# Use Reorient2DBy3D() to orient faces of 2 geom faces to have their normal pointing inside volumes
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mesh3D = smesh_builder.Mesh( box, '3D mesh')
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mesh3D.AutomaticHexahedralization(0.5)
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group0 = mesh3D.Group( faces[0] )
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group1 = mesh3D.Group( faces[1] )
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# pass group0 and ids of faces of group1 to inverse
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nbRev = mesh3D.Reorient2DBy3D([ group0, group1.GetIDs() ], mesh3D, theOutsideNormal=False)
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print("Nb reoriented faces:", nbRev)
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# orient the reversed faces back
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nbRev = mesh3D.Reorient2DBy3D( mesh3D, mesh3D, theOutsideNormal=True)
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print("Nb re-reoriented faces:", nbRev)
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