# -*- coding: iso-8859-1 -*- # Copyright (C) 2007-2023 CEA, EDF, OPEN CASCADE # # Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN, # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com # # ================================== # import salome salome.salome_init() import GEOM from salome.geom import geomBuilder geompy = geomBuilder.New() import SMESH, SALOMEDS from salome.smesh import smeshBuilder smesh = smeshBuilder.New() # Geometry # ======== # With hexahedral, build a box partially holed by a not centered cylinder with a thickness # Values # ------ box_dx = 1000 box_dy = 900 box_dz = 800 cyl_x = 500 cyl_y = 300 cyl_dz = 600 cyl_radius = 150 cyl_thick = 30 # Triangular face # --------------- def triangle(p1, p2, p3): l = [] l.append(geompy.MakeEdge(p1, p2)) l.append(geompy.MakeEdge(p2, p3)) l.append(geompy.MakeEdge(p3, p1)) w = geompy.MakeWire(l) return geompy.MakeFace(w, 1) # The holed part # ============== # Vertex of the holed part # ------------------------ hole_point_11 = geompy.MakeVertex(0 , 0 , 0) hole_point_21 = geompy.MakeVertex(box_dx, 0 , 0) hole_point_12 = geompy.MakeVertex(0 , box_dy, 0) hole_point_22 = geompy.MakeVertex(box_dx, box_dy, 0) hole_center = geompy.MakeVertex(cyl_x, cyl_y, 0) # Faces of the holed part # ----------------------- hole_face_1 = triangle(hole_point_11, hole_point_21, hole_center) hole_face_2 = triangle(hole_point_21, hole_point_22, hole_center) hole_face_3 = triangle(hole_point_12, hole_point_22, hole_center) hole_face_4 = triangle(hole_point_11, hole_point_12, hole_center) # Solids of the holed part # ------------------------ cyl_dir = geompy.MakeVectorDXDYDZ(0, 0, 1) hole_solid_1 = geompy.MakePrismVecH(hole_face_1, cyl_dir, cyl_dz) hole_solid_2 = geompy.MakePrismVecH(hole_face_2, cyl_dir, cyl_dz) hole_solid_3 = geompy.MakePrismVecH(hole_face_3, cyl_dir, cyl_dz) hole_solid_4 = geompy.MakePrismVecH(hole_face_4, cyl_dir, cyl_dz) hole_internal = geompy.MakeCylinder(hole_center, cyl_dir, cyl_radius , cyl_dz) hole_external = geompy.MakeCylinder(hole_center, cyl_dir, cyl_radius+cyl_thick, cyl_dz) hole_median = geompy.MakeCut(hole_external, hole_internal) # Boolean operations # ------------------ blocks = [] blocks.append( geompy.MakeCut(hole_solid_1, hole_external)) blocks.append(geompy.MakeCommon(hole_solid_1, hole_median )) blocks.append( geompy.MakeCut(hole_solid_2, hole_external)) blocks.append(geompy.MakeCommon(hole_solid_2, hole_median )) blocks.append( geompy.MakeCut(hole_solid_3, hole_external)) blocks.append(geompy.MakeCommon(hole_solid_3, hole_median )) blocks.append( geompy.MakeCut(hole_solid_4, hole_external)) blocks.append(geompy.MakeCommon(hole_solid_4, hole_median )) # The full part # ============= # Vertex of the full part # ----------------------- full_point_11 = geompy.MakeVertex(0 , 0 , cyl_dz) full_point_21 = geompy.MakeVertex(box_dx, 0 , cyl_dz) full_point_12 = geompy.MakeVertex(0 , box_dy, cyl_dz) full_point_22 = geompy.MakeVertex(box_dx, box_dy, cyl_dz) full_center = geompy.MakeVertex(cyl_x, cyl_y, cyl_dz) # Faces of the full part # ---------------------- full_face_1 = triangle(full_point_11, full_point_21, full_center) full_face_2 = triangle(full_point_21, full_point_22, full_center) full_face_3 = triangle(full_point_12, full_point_22, full_center) full_face_4 = triangle(full_point_11, full_point_12, full_center) # Solids of the full part # ------------------------ full_dz = box_dz - cyl_dz full_solid_1 = geompy.MakePrismVecH(full_face_1, cyl_dir, full_dz) full_solid_2 = geompy.MakePrismVecH(full_face_2, cyl_dir, full_dz) full_solid_3 = geompy.MakePrismVecH(full_face_3, cyl_dir, full_dz) full_solid_4 = geompy.MakePrismVecH(full_face_4, cyl_dir, full_dz) full_internal = geompy.MakeCylinder(full_center, cyl_dir, cyl_radius , full_dz) full_external = geompy.MakeCylinder(full_center, cyl_dir, cyl_radius+cyl_thick, full_dz) full_median = geompy.MakeCut(full_external, full_internal) # Boolean operations # ------------------ full = [] full.append( geompy.MakeCut(full_solid_1, full_external)) full.append(geompy.MakeCommon(full_solid_1, full_median)) full.append( geompy.MakeCut(full_solid_2, full_external)) full.append(geompy.MakeCommon(full_solid_2, full_median )) full.append( geompy.MakeCut(full_solid_3, full_external)) full.append(geompy.MakeCommon(full_solid_3, full_median)) full.append( geompy.MakeCut(full_solid_4, full_external)) full.append(geompy.MakeCommon(full_solid_4, full_median)) # Filling the hole # ---------------- box_d = cyl_radius/3 x = cyl_x-box_d y = x * cyl_y / cyl_x box_point_11 = geompy.MakeVertex(x, y, cyl_dz) x = cyl_x+box_d y = (box_dx - x) * cyl_y / (box_dx - cyl_x) box_point_12 = geompy.MakeVertex(x, y, cyl_dz) x = cyl_x-box_d y = box_dy - x * (box_dy - cyl_y) / cyl_x box_point_21 = geompy.MakeVertex(x, y, cyl_dz) x = cyl_x+box_d y = box_dy - (box_dx - x) * (box_dy - cyl_y) / (box_dx - cyl_x) box_point_22 = geompy.MakeVertex(x, y, cyl_dz) box_face = geompy.MakeQuad4Vertices(box_point_11, box_point_12, box_point_21, box_point_22) box = geompy.MakePrismVecH(box_face, cyl_dir, full_dz) full.append(box) full.append(geompy.MakeCut(geompy.MakeCommon(full_solid_1, full_internal), box)) full.append(geompy.MakeCut(geompy.MakeCommon(full_solid_2, full_internal), box)) full.append(geompy.MakeCut(geompy.MakeCommon(full_solid_3, full_internal), box)) full.append(geompy.MakeCut(geompy.MakeCommon(full_solid_4, full_internal), box)) # Cut the cylinder thickness # ------------------------- full_plan = geompy.MakePlane(geompy.MakeVertex(0, 0, cyl_dz+cyl_thick), cyl_dir, 5000) full_parts = geompy.MakePartition(full, [full_plan], [], [], geompy.ShapeType["SOLID"]) # Geometry result # --------------- blocks.append(full_parts) piece_cpd = geompy.MakeCompound(blocks) piece_ok = geompy.RemoveExtraEdges(piece_cpd, doUnionFaces=True) piece = geompy.MakeGlueFaces(piece_ok, 1.e-3) piece_id = geompy.addToStudy(piece, "ex13_hole1partial") # Meshing # ======= # Create a mesh # ------------- hexa = smesh.Mesh(piece, "ex13_hole1partial:hexa") algo = hexa.Segment() algo.NumberOfSegments(2) hexa.Quadrangle() hexa.Hexahedron() # Local hypothesis # ---------------- def local(x, y, z, d): edge = geompy.GetEdgeNearPoint(piece, geompy.MakeVertex(x, y, z)) algo = hexa.Segment(edge) algo.NumberOfSegments(d) algo.Propagation() local(0, 0, 100, 40) local(0, 0, 700, 15) local(100, 0, 0, 20) local(0, 100, 0, 20) local(100, 100, 0, 25) d = cyl_radius-3*cyl_thick local(cyl_x+d, cyl_y+d, box_dz, 10) # Compute the mesh # ---------------- isDone = hexa.Compute() if not isDone: raise Exception("Error when computing Mesh") # Update object browser # --------------------- salome.sg.updateObjBrowser()