3 \page tui_defining_blsurf_hypotheses_page Defining Hypotheses for BLSurf Algorithm
6 <h2>Construction of Mesh using BLSurf algorithm</h2>
7 <h3>Basic hypothesis</h3>
14 box = geompy.MakeBoxDXDYDZ(200., 200., 200.)
15 geompy.addToStudy(box, "box")
18 Face_1 = geompy.SubShapeAllSorted(box, geompy.ShapeType["FACE"])[0]
19 Edge_1 = geompy.SubShapeAllSorted(box, geompy.ShapeType["EDGE"])[0]
20 Vertex_1 = geompy.SubShapeAllSorted(box, geompy.ShapeType["VERTEX"])[0]
22 Face_2 = geompy.SubShapeAllSorted(box, geompy.ShapeType["FACE"])[5]
23 Wire_1 = geompy.SubShapeAllSorted(Face_2, geompy.ShapeType["WIRE"])[0]
25 # Geom object with sizemaps can be unpublished in study.
26 # They will then be automatically published.
27 geompy.addToStudyInFather(box,Face_1, "Face_1")
28 geompy.addToStudyInFather(box,Edge_1, "Edge_1")
29 geompy.addToStudyInFather(box,Vertex_1, "Vertex_1")
31 geompy.addToStudyInFather(box ,Face_2, "Face_2")
32 geompy.addToStudyInFather(Face_2,Wire_1, "Wire_1")
34 # create a mesh on the box
35 blsurfMesh = smesh.Mesh(box,"box: BLSurf mesh")
37 # create a BLSurf algorithm for faces
38 algo2d = blsurfMesh.Triangle(algo=smesh.BLSURF)
43 <h3>Adding sizemaps</h3>
45 # optional - set physical mesh to 2 = Size Map
46 algo2d.SetPhysicalMesh( 2 )
48 # optional - set global mesh size
49 algo2d.SetPhySize( 34.641 )
52 algo2d.SetSizeMap(Face_1, 'def f(u,v): return 10' )
54 algo2d.SetSizeMap(Edge_1, 'def f(t): return 5' )
55 # set size on Vertex_1
56 algo2d.SetSizeMap(Vertex_1, 'def f(): return 2' )
64 <h3>Adding enforced vertices</h3>
67 # Add enforced vertex for Face_1 on (50, 50, 50)
68 # The projection coordinates will be (50, 50, 0)
69 algo2d.SetEnforcedVertex(Face_1, 50, 50, 50)
71 # Add another enforced vertex on (150, 150, 150)
72 algo2d.SetEnforcedVertex(Face_1, 150, 150, 150)
74 # Retrieve and print the list of enforced vertices defines on Face_1
75 enfList = algo2d.GetEnforcedVertices(Face_1)
76 print "List of enforced vertices for Face_1: "
82 # Remove an enforced vertex and print the list
83 algo2d.UnsetEnforcedVertex(Face_1, 50, 50, 50)
84 enfList = algo2d.GetEnforcedVertices(Face_1)
85 print "List of enforced vertices for Face_1: "
91 # Remove all enforced vertices defined on Face_1
92 algo2d.UnsetEnforcedVertices(Face_1)
101 <h3>Adding an attractor</h3>
104 # Add an attractor on Face_2, which shape is Wire_1
106 # The size on Wire_1 is 1 and will grow until a maximum of 36.641 (physical size set above)
107 # The influence distance of the attractor is 20
108 # The size is kept constant until a distance of 10
109 algo2d.SetAttractorGeom(Face_2, Wire_1, 1, 36.641, 20, 10)
111 # In order to let the attractor control the growing of the mesh let set
112 # the gradation to its maximum
113 algo2d.SetGradation( 2.5 )
122 <h3>Using internal vertices</h3>
125 # Creating a geometry containing internal vertices
126 Face_3 = geompy.MakeFaceHW(1, 1, 1)
127 Vertex_2 = geompy.MakeVertex(0.2, 0.2, 0)
128 Partition_1 = geompy.MakePartition([Face_3, Vertex_2], [], [], [], geompy.ShapeType["FACE"], 0, [], 0)
129 OX = geompy.MakeVectorDXDYDZ(1, 0, 0)
130 OY = geompy.MakeVectorDXDYDZ(0, 1, 0)
131 Multi_Translation_1 = geompy.MakeMultiTranslation2D(Partition_1, OX, 1, 10, OY, 1, 10)
132 geompy.addToStudy( Face_3, 'Face_3' )
133 geompy.addToStudy( Vertex_2, 'Vertex_2' )
134 geompy.addToStudy( Partition_1, 'Partition_1' )
135 geompy.addToStudy( OX, 'OX' )
136 geompy.addToStudy( OY, 'OY' )
137 geompy.addToStudy( Multi_Translation_1, 'Multi-Translation_1' )
139 # The mesh on the geometry with internal vertices
140 blsurfMesh_internal = smesh.Mesh(Multi_Translation_1, "blsurfMesh_internal")
141 algo2d = blsurfMesh_internal.Triangle(algo=smesh.BLSURF)
142 algo2d.SetPhySize( 0.1 )
144 # Allows BLSURF to take into account internal vertices
145 algo2d.SetInternalEnforcedVertexAllFaces( True )
147 # Add the created nodes into a group
148 algo2d.SetInternalEnforcedVertexAllFacesGroup( "my group" )
151 blsurfMesh_internal.Compute()