test/SMESH_create_dual_mesh_tpipe.py

   1 #!/usr/bin/env python3
   2
   3 import sys
   4 import salome
   5 import math
   6
   7 salome.salome_init()
   8
   9 import GEOM
  10 from salome.geom import geomBuilder
  11
  12 geompy = geomBuilder.New()
  13
  14 # first cylinder
  15 r1 = 0.5
  16 h1 = 5
  17
  18 # second cylinder
  19 r2 = 0.3
  20 h2 = 3
  21
  22 length_piquage = 1.5
  23
  24 O = geompy.MakeVertex(0, 0, 0)
  25 OX = geompy.MakeVectorDXDYDZ(1, 0, 0)
  26 OY = geompy.MakeVectorDXDYDZ(0, 1, 0)
  27 OZ = geompy.MakeVectorDXDYDZ(0, 0, 1)
  28 geompy.addToStudy( O, 'O' )
  29 geompy.addToStudy( OX, 'OX' )
  30 geompy.addToStudy( OY, 'OY' )
  31 geompy.addToStudy( OZ, 'OZ' )
  32
  33 Cylinder_1 = geompy.MakeCylinderRH(r1, h1)
  34 Cylinder_2 = geompy.MakeCylinderRH(r2, h2)
  35 Rotation_1 = geompy.MakeRotation(Cylinder_2, OY, -90*math.pi/180.0)
  36 Translation_1 = geompy.MakeTranslation(Rotation_1, 0, 0, length_piquage)
  37
  38 tpipe = geompy.MakeFuseList([Cylinder_1, Translation_1], True, True)
  39 geompy.addToStudy( tpipe, 'tpipe' )
  40
  41 Inlet_z = geompy.GetFaceNearPoint(tpipe, O)
  42 geompy.addToStudyInFather( tpipe, Inlet_z, 'Inlet_z' )
  43
  44 p_inlet_x = geompy.MakeVertex(-h2, 0, length_piquage)
  45 Inlet_x = geompy.GetFaceNearPoint(tpipe, p_inlet_x)
  46 geompy.addToStudyInFather( tpipe, Inlet_x, 'Inlet_x' )
  47
  48 p_outlet = geompy.MakeVertex(0, 0, h1)
  49 Outlet = geompy.GetFaceNearPoint(tpipe, p_outlet)
  50 geompy.addToStudyInFather( tpipe, Outlet, 'Outlet' )
  51
  52 Wall = geompy.CreateGroup(tpipe, geompy.ShapeType["FACE"])
  53 faces = geompy.SubShapeAll(tpipe, geompy.ShapeType["FACE"])
  54 geompy.UnionList(Wall, faces)
  55 geompy.DifferenceList(Wall, [Inlet_x, Inlet_z, Outlet])
  56 geompy.addToStudyInFather( tpipe, Wall, 'Wall' )
  57
  58 p_corner = geompy.MakeVertex(-r2, 0, length_piquage+r2)
  59 corner = geompy.GetVertexNearPoint(tpipe, p_corner)
  60 geompy.addToStudyInFather( tpipe, corner, 'corner' )
  61
  62 geom_groups = [Inlet_x, Inlet_z, Outlet, Wall]
  63
  64 volumeGEOM = geompy.BasicProperties(tpipe)[2]
  65
  66 ###
  67 ### SMESH component
  68 ###
  69
  70 import  SMESH, SALOMEDS
  71 from salome.smesh import smeshBuilder
  72
  73 from salome.StdMeshers import StdMeshersBuilder
  74
  75 smesh = smeshBuilder.New()
  76
  77 # Coarse mesh with default hypothesis
  78 Mesh_1 = smesh.Mesh(tpipe, "Mesh_coarse")
  79
  80 Mesh_1.Triangle(algo=smeshBuilder.NETGEN_1D2D)
  81
  82 Mesh_1.Tetrahedron(algo=smeshBuilder.NETGEN_3D)
  83 isDone = Mesh_1.Compute()
  84
  85 # Create groups
  86 d_mesh_groups = {}
  87 for geom_group in geom_groups:
  88   gr = Mesh_1.Group(geom_group)
  89   gr_name = gr.GetName()
  90   d_mesh_groups[gr_name] = gr
  91
  92 # Check tetra mesh volume
  93 mesh_volume = smesh.GetVolume(Mesh_1)
  94 shape_volume = geompy.BasicProperties(tpipe)[2]
  95 assert abs(mesh_volume-shape_volume)/shape_volume < 0.05
  96
  97 dual_Mesh_raw_1 = smesh.CreateDualMesh(Mesh_1, 'dual_Mesh_raw_1', False)
  98
  99 # check polyhedrons
 100 assert dual_Mesh_raw_1.NbPolyhedrons() > 0
 101 assert dual_Mesh_raw_1.NbPolyhedrons() == dual_Mesh_raw_1.NbVolumes()
 102
 103 # Check dual mesh volume
 104 dual_raw_volume = dual_Mesh_raw_1.GetVolume()
 105 assert abs(dual_raw_volume-shape_volume)/shape_volume < 0.11
 106
 107 # Check groups
 108 dual_Mesh_raw_groups = dual_Mesh_raw_1.GetGroups()
 109 dual_Mesh_raw_group_names = dual_Mesh_raw_1.GetGroupNames()
 110
 111 assert len(dual_Mesh_raw_groups) == 4
 112
 113 for gr_dual, gr_name in zip(dual_Mesh_raw_groups, dual_Mesh_raw_group_names):
 114   gr_name = gr_name.strip()
 115   gr_tri = d_mesh_groups[gr_name]
 116   area_gr_tri = smesh.GetArea(gr_tri)
 117   area_gr_dual = smesh.GetArea(gr_dual)
 118   print(gr_name)
 119   print("Area tri: ", area_gr_tri)
 120   print("Area dual:", area_gr_dual)
 121   assert abs(area_gr_tri-area_gr_dual)/area_gr_tri < 1e-3
 122
 123 #dual_Mesh_1 = smesh.CreateDualMesh(Mesh_1, 'dual_Mesh_1', True)
 124
 125
 126 #dual_volume = dual_Mesh_1.GetVolume()
 127 #dual_raw_volume = dual_Mesh_raw_1.GetVolume()
 128 #print("dual_volume: ", dual_volume)
 129 #print("dual_raw_volume: ", dual_raw_volume)
 130
 131 #assert (dual_volume >= dual_raw_volume)
 132
 133 if salome.sg.hasDesktop():
 134   salome.sg.updateObjBrowser()