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https://git.salome-platform.org/gitpub/modules/smesh.git
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85 lines
3.0 KiB
Python
85 lines
3.0 KiB
Python
# Projection Algorithms
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# Project prisms from one meshed box to another mesh on the same box
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import salome
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salome.salome_init_without_session()
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import GEOM
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from salome.geom import geomBuilder
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geompy = geomBuilder.New()
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import SMESH, SALOMEDS
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from salome.smesh import smeshBuilder
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smesh = smeshBuilder.New()
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# Prepare geometry
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# Create a parallelepiped
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box = geompy.MakeBoxDXDYDZ(200, 100, 70)
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geompy.addToStudy( box, "box" )
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# Get geom faces to mesh with triangles in the 1ts and 2nd meshes
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faces = geompy.SubShapeAll(box, geompy.ShapeType["FACE"])
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# 2 adjacent faces of the box
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f1 = faces[2]
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f2 = faces[0]
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# face opposite to f2
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f2opp = geompy.GetOppositeFace( box, f2 )
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# Get vertices used to specify how to associate sides of faces at projection
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[v1F1, v2F1] = geompy.SubShapeAll(f1, geompy.ShapeType["VERTEX"])[:2]
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[v1F2, v2F2] = geompy.SubShapeAll(f2, geompy.ShapeType["VERTEX"])[:2]
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geompy.addToStudyInFather( box, v1F1, "v1F1" )
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geompy.addToStudyInFather( box, v2F1, "v2F1" )
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geompy.addToStudyInFather( box, v1F2, "v1F2" )
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geompy.addToStudyInFather( box, v2F2, "v2F2" )
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# Make group of 3 edges of f1 and f2
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edgesF1 = geompy.CreateGroup(f1, geompy.ShapeType["EDGE"])
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geompy.UnionList( edgesF1, geompy.SubShapeAll(f1, geompy.ShapeType["EDGE"])[:3])
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edgesF2 = geompy.CreateGroup(f2, geompy.ShapeType["EDGE"])
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geompy.UnionList( edgesF2, geompy.SubShapeAll(f2, geompy.ShapeType["EDGE"])[:3])
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geompy.addToStudyInFather( box, edgesF1, "edgesF1" )
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geompy.addToStudyInFather( box, edgesF2, "edgesF2" )
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# Make the source mesh with prisms
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src_mesh = smesh.Mesh(box, "Source mesh")
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src_mesh.Segment().NumberOfSegments(9,10)
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src_mesh.Quadrangle()
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src_mesh.Hexahedron()
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src_mesh.Triangle(f1) # triangular sub-mesh
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src_mesh.Compute()
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# Mesh the box using projection algorithms
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# Define the same global 1D and 2D hypotheses
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tgt_mesh = smesh.Mesh(box, "Target mesh")
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tgt_mesh.Segment().NumberOfSegments(9,10,UseExisting=True)
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tgt_mesh.Quadrangle()
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# Define Projection 1D algorithm to project 1d mesh elements from group edgesF2 to edgesF1
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# It is actually not needed, just a demonstration
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proj1D = tgt_mesh.Projection1D( edgesF1 )
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# each vertex must be at the end of a connected group of edges (or a sole edge)
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proj1D.SourceEdge( edgesF2, src_mesh, v2F1, v2F2 )
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# Define 2D hypotheses to project triangles from f1 face of the source mesh to
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# f2 face in the target mesh. Vertices specify how to associate sides of faces
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proj2D = tgt_mesh.Projection2D( f2 )
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proj2D.SourceFace( f1, src_mesh, v1F1, v1F2, v2F1, v2F2 )
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# 2D hypotheses to project triangles from f2 of target mesh to the face opposite to f2.
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# Association of face sides is default
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proj2D = tgt_mesh.Projection2D( f2opp )
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proj2D.SourceFace( f2 )
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# 3D hypotheses to project prisms from the source to the target mesh
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proj3D = tgt_mesh.Projection3D()
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proj3D.SourceShape3D( box, src_mesh, v1F1, v1F2, v2F1, v2F2 )
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tgt_mesh.Compute()
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# Move the source mesh to visually compare the two meshes
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src_mesh.TranslateObject( src_mesh, smesh.MakeDirStruct( 210, 0, 0 ), Copy=False)
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