mirror of
https://git.salome-platform.org/gitpub/modules/smesh.git
synced 2024-11-12 00:29:17 +05:00
79 lines
2.4 KiB
Python
79 lines
2.4 KiB
Python
# Usage of Extrusion 3D meshing algorithm
|
|
|
|
import salome
|
|
salome.salome_init()
|
|
|
|
from salome.geom import geomBuilder
|
|
geompy = geomBuilder.New()
|
|
|
|
import SMESH
|
|
from salome.smesh import smeshBuilder
|
|
smesh = smeshBuilder.New()
|
|
|
|
OX = geompy.MakeVectorDXDYDZ(1,0,0)
|
|
OY = geompy.MakeVectorDXDYDZ(0,1,0)
|
|
OZ = geompy.MakeVectorDXDYDZ(0,0,1)
|
|
|
|
# Y ^ Make geometry of a "pipe" with the following base (cross section).
|
|
# | Big central quadrangles will be meshed with triangles, walls
|
|
# of the pipe will be meshed with quadrilaterals
|
|
# +--+--+--+--+--+--+
|
|
# | | | | | | |
|
|
# +--+--+--+--+--+--+
|
|
# | | | | |
|
|
# +--+ | +--+
|
|
# | | | | |
|
|
# +--+-----+-----+--+
|
|
# | | | | |
|
|
# +--+ | +--+
|
|
# | | | | |
|
|
# +--+--+--+--+--+--+
|
|
# | | | | | | | -->
|
|
# +--+--+--+--+--+--+ X
|
|
|
|
quadBig = geompy.MakeFaceHW( 20,20, 1 )
|
|
quadBig = geompy.MakeTranslation( quadBig, 15,15,0 )
|
|
quadSmall = geompy.MakeFaceHW( 10,10, 1 )
|
|
smallQuads1 = geompy.MakeMultiTranslation1D( quadSmall, OX, 10, 3 )
|
|
smallQuads2 = geompy.MakeMultiTranslation1D( quadSmall, OY, 10, 3 )
|
|
smallQuads2 = geompy.SubShapeAllSortedCentres( smallQuads2, geompy.ShapeType["FACE"])[1:]
|
|
|
|
base = geompy.MakeCompound( smallQuads2 + [smallQuads1, quadBig])
|
|
axis = geompy.MakeLine( geompy.MakeVertex( 25,25,0), OZ )
|
|
base = geompy.MultiRotate1DNbTimes( base, axis, 4)
|
|
base = geompy.MakePartition( [base], theName="base")
|
|
path = geompy.MakeSketcher("Sketcher:F 0 0:TT 0 100:R 0:C -90 180:T 0 -150",[0,0,0, 0,-1,0, 1,0,0])
|
|
|
|
# Make the pipe, each quadrangle of the base turns into a prism with composite wall faces
|
|
pipe = geompy.MakePipe( base, path )
|
|
prisms = geompy.MakePartition( [pipe], theName="prisms")
|
|
|
|
|
|
# get base faces of the prism to define sub-mesh on them
|
|
smallQuad = geompy.GetFaceNearPoint( prisms, geompy.MakeVertex( 0,0,0 ), "smallQuad")
|
|
bigQuad = geompy.GetFaceNearPoint( prisms, geompy.MakeVertex( 15,15,0 ), "bigQuad")
|
|
|
|
|
|
mesh = smesh.Mesh( prisms )
|
|
|
|
# assign Global hypotheses
|
|
|
|
# 1D algorithm and hypothesis for division along the pipe
|
|
mesh.Segment().NumberOfSegments(15)
|
|
|
|
# Extrusion 3D algo
|
|
mesh.Prism()
|
|
|
|
# assign Local hypotheses
|
|
|
|
# 1D and 2D algos and hyps to mesh smallQuad with quadrilaterals
|
|
mesh.Segment(smallQuad).LocalLength( 3 )
|
|
mesh.Quadrangle(smallQuad)
|
|
|
|
# 1D and 2D algos and hyps to mesh bigQuad with triangles
|
|
mesh.Segment(bigQuad).LocalLength( 3 )
|
|
mesh.Triangle(bigQuad)
|
|
|
|
# compute the mesh
|
|
mesh.Compute()
|