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https://git.salome-platform.org/gitpub/modules/smesh.git
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175 lines
6.7 KiB
Python
175 lines
6.7 KiB
Python
# Extrusion along a Path
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import math
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import salome
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salome.salome_init_without_session()
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import SMESH
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from salome.geom import geomBuilder
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from salome.smesh import smeshBuilder
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geom_builder = geomBuilder.New()
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smesh_builder = smeshBuilder.New()
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# 1. Create points
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points = [[0, 0], [50, 30], [50, 110], [0, 150], [-80, 150], [-130, 70], [-130, -20]]
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iv = 1
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vertices = []
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for point in points:
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vert = geom_builder.MakeVertex(point[0], point[1], 0)
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vertices.append(vert)
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iv += 1
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# 2. Create edges and wires
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Edge_straight = geom_builder.MakeEdge(vertices[0], vertices[4])
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Edge_bezierrr = geom_builder.MakeBezier(vertices)
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Wire_polyline = geom_builder.MakePolyline(vertices)
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Edge_Circle = geom_builder.MakeCircleThreePnt(vertices[0], vertices[1], vertices[2])
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geom_builder.addToStudy(Edge_straight, "Edge_straight")
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geom_builder.addToStudy(Edge_bezierrr, "Edge_bezierrr")
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geom_builder.addToStudy(Wire_polyline, "Wire_polyline")
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geom_builder.addToStudy(Edge_Circle , "Edge_Circle")
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# 3. Explode wire on edges, as they will be used for mesh extrusion
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Wire_polyline_edges = geom_builder.SubShapeAll(Wire_polyline, geom_builder.ShapeType["EDGE"])
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for ii in range(len(Wire_polyline_edges)):
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geom_builder.addToStudyInFather(Wire_polyline, Wire_polyline_edges[ii], "Edge_" + repr(ii + 1))
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# Mesh
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# Mesh the given shape with the given 1d hypothesis
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def Mesh1D(shape1d, nbSeg, name):
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mesh1d_tool = smesh_builder.Mesh(shape1d, name)
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algo = mesh1d_tool.Segment()
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hyp = algo.NumberOfSegments(nbSeg)
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isDone = mesh1d_tool.Compute()
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if not isDone: raise Exception('Mesh %s: computation failed' % name)
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return mesh1d_tool
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# Create a mesh with six nodes, seven edges and two quadrangle faces
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def MakeQuadMesh2(mesh_name):
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quad_1 = smesh_builder.Mesh(name = mesh_name)
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# six nodes
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n1 = quad_1.AddNode(0, 20, 10)
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n2 = quad_1.AddNode(0, 40, 10)
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n3 = quad_1.AddNode(0, 40, 30)
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n4 = quad_1.AddNode(0, 20, 30)
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n5 = quad_1.AddNode(0, 0, 30)
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n6 = quad_1.AddNode(0, 0, 10)
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# seven edges
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quad_1.AddEdge([n1, n2]) # 1
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quad_1.AddEdge([n2, n3]) # 2
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quad_1.AddEdge([n3, n4]) # 3
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quad_1.AddEdge([n4, n1]) # 4
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quad_1.AddEdge([n4, n5]) # 5
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quad_1.AddEdge([n5, n6]) # 6
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quad_1.AddEdge([n6, n1]) # 7
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# two quadrangle faces
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quad_1.AddFace([n1, n2, n3, n4]) # 8
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quad_1.AddFace([n1, n4, n5, n6]) # 9
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return [quad_1, [1,2,3,4,5,6,7], [8,9]]
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# Path meshes
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Edge_straight_mesh = Mesh1D(Edge_straight, 7, "Edge_straight")
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Edge_bezierrr_mesh = Mesh1D(Edge_bezierrr, 7, "Edge_bezierrr")
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Wire_polyline_mesh = Mesh1D(Wire_polyline, 3, "Wire_polyline")
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Edge_Circle_mesh = Mesh1D(Edge_Circle , 8, "Edge_Circle")
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# Initial meshes (to be extruded)
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[quad_1, ee_1, ff_1] = MakeQuadMesh2("quad_1")
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[quad_2, ee_2, ff_2] = MakeQuadMesh2("quad_2")
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[quad_3, ee_3, ff_3] = MakeQuadMesh2("quad_3")
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[quad_4, ee_4, ff_4] = MakeQuadMesh2("quad_4")
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[quad_5, ee_5, ff_5] = MakeQuadMesh2("quad_5")
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[quad_6, ee_6, ff_6] = MakeQuadMesh2("quad_6")
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[quad_7, ee_7, ff_7] = MakeQuadMesh2("quad_7")
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# ExtrusionAlongPath
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# IDsOfElements, PathMesh, PathShape, NodeStart,
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# HasAngles, Angles, HasRefPoint, RefPoint
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refPoint = SMESH.PointStruct(0, 0, 0)
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a10 = math.radians( 10.0 )
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a45 = math.radians( 45.0 )
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# 1. Extrusion of two mesh edges along a straight path
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error = quad_1.ExtrusionAlongPath([1,2], Edge_straight_mesh, Edge_straight, 1,
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0, [], 0, refPoint)
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# 2. Extrusion of one mesh edge along a curved path
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error = quad_2.ExtrusionAlongPath([2], Edge_bezierrr_mesh, Edge_bezierrr, 1,
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0, [], 0, refPoint)
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# 3. Extrusion of one mesh edge along a curved path with usage of angles
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error = quad_3.ExtrusionAlongPath([2], Edge_bezierrr_mesh, Edge_bezierrr, 1,
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1, [a45, a45, a45, 0, -a45, -a45, -a45], 0, refPoint)
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# 4. Extrusion of one mesh edge along the path, which is a part of a meshed wire
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error = quad_4.ExtrusionAlongPath([4], Wire_polyline_mesh, Wire_polyline_edges[0], 1,
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1, [a10, a10, a10], 0, refPoint)
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# 5. Extrusion of two mesh faces along the path, which is a part of a meshed wire
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error = quad_5.ExtrusionAlongPath(ff_5 , Wire_polyline_mesh, Wire_polyline_edges[2], 4,
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0, [], 0, refPoint)
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# 6. Extrusion of two mesh faces along a closed path
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error = quad_6.ExtrusionAlongPath(ff_6 , Edge_Circle_mesh, Edge_Circle, 1,
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0, [], 0, refPoint)
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# 7. Extrusion of two mesh faces along a closed path with usage of angles
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error = quad_7.ExtrusionAlongPath(ff_7, Edge_Circle_mesh, Edge_Circle, 1,
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1, [a45, -a45, a45, -a45, a45, -a45, a45, -a45], 0, refPoint)
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# Make the same meshes using a fully functional method ExtrusionAlongPathObjects() having
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# the following arguments:
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# Nodes, Edges, Faces, PathObject, PathShape=None,
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# NodeStart=1, HasAngles=False, Angles=[], LinearVariation=False,
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# HasRefPoint=False, RefPoint=[0,0,0], MakeGroups=False,
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# ScaleFactors=[], ScalesVariation=False
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quad_1 = MakeQuadMesh2("quad_1")[0]
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quad_2 = MakeQuadMesh2("quad_2")[0]
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quad_3 = MakeQuadMesh2("quad_3")[0]
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quad_4 = MakeQuadMesh2("quad_4")[0]
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quad_5 = MakeQuadMesh2("quad_5")[0]
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quad_6 = MakeQuadMesh2("quad_6")[0]
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quad_7 = MakeQuadMesh2("quad_7")[0]
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# 1. Extrusion of two mesh edges along a straight path
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nn, ee, ff = [], [1,2], []
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error = quad_1.ExtrusionAlongPathObjects( nn, ee, ff, Edge_straight_mesh )
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# 2. Extrusion of one mesh edge along a curved path
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nn, ee, ff = [], [2], []
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error = quad_2.ExtrusionAlongPathObjects( nn, ee, ff, Edge_bezierrr_mesh )
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# 3. Extrusion of one mesh edge along a curved path with usage of angles
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error = quad_3.ExtrusionAlongPathObjects( nn, ee, ff, Edge_bezierrr_mesh,
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Angles=[a45, a45, a45, 0, -a45, -a45, -a45])
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# 4. Extrusion of one mesh edge along the path, which is a part of a meshed wire
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nn, ee, ff = [], [4], []
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error = quad_4.ExtrusionAlongPathObjects( nn, ee, ff, Wire_polyline_mesh, Wire_polyline_edges[0],
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Angles=[a10, a10, a10])
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# 5. Extrusion of two mesh faces along the path, which is a part of a meshed wire
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nn, ee, ff = [], [], quad_5
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error = quad_5.ExtrusionAlongPathObjects( nn, ee, ff, Wire_polyline_mesh, Wire_polyline_edges[2],
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NodeStart=4 )
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# 6. Extrusion of two mesh faces along a closed path
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nn, ee, ff = [], [], quad_6
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error = quad_6.ExtrusionAlongPathObjects( nn, ee, ff, Edge_Circle_mesh )
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# 7. Extrusion of two mesh faces along a closed path with usage of angles
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nn, ee, ff = [], [], quad_7
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error = quad_7.ExtrusionAlongPathObjects( nn, ee, ff, Edge_Circle_mesh, Edge_Circle,
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Angles=[a45, -a45, a45, -a45, a45, -a45, a45, -a45])
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