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