I've experimented with GeomFill_ConstrainedFilling to close the profile.
The function needs 3 or 4 BSplines for the filling to work. I have only one
closed
BSpline, so I used 'dummies' for the rest (degenerated Bounds). My
parameters must be wrong, since it segfaulted on me.
The GeomPlate module did create a surface, but the boundary does not
meet the profile. There's probably some problem with my parameters again.
Thanks for the help!
Balint
# -*- coding: utf-8 -*-
from OCC.Utils.DataExchange.STEP import *
from OCC.Utils.Topology import *
from OCC.BRepBuilderAPI import *
from OCC.GeomPlate import *
from OCC.BRepAdaptor import *
from OCC.BRepFill import *
from OCC.Display.SimpleGui import *
display, start_display, add_menu, add_function_to_menu = init_display()
# ================================================================
# STEP IMPORT
BladeImporter = STEPImporter("blade.stp")
BladeImporter.ReadFile()
shapeList = BladeImporter.GetShapes()
bladeSurface = shapeList[0]
# ================================================================
## GETTING BLADE EDGES + WIRES:
topoBlade = Topo(bladeSurface)
bladeFace = topoBlade.faces().next()
edges = []
for edge in topoBlade.edges_from_face(bladeFace):
edges.append(edge)
## Creating wires:
bladeShroudEdge = edges[2]
bladeHubEdge = edges[0]
bladeShroudEdge.Reverse()
bladeShroudWire = BRepBuilderAPI_MakeWire(bladeShroudEdge).Wire()
bladeHubWire = BRepBuilderAPI_MakeWire(bladeHubEdge).Wire()
# ================================================================
# GEOMPLATE:
bpSrf = GeomPlate_BuildPlateSurface(3,15,2)
# add curve constraints
for edg in WireExplorer(bladeShroudWire).ordered_edges():
c = BRepAdaptor_HCurve()
c.ChangeCurve().Initialize(edg)
constraint = BRepFill_CurveConstraint(c.GetHandle(), 0)
bpSrf.Add(constraint.GetHandle())
bpSrf.Perform()
maxSeg, maxDeg, critOrder = 9,8,0
tol = 1e-4
dmax = max([tol,10*bpSrf.G0Error()])
srf = bpSrf.Surface()
plate = GeomPlate_MakeApprox(srf, tol, maxSeg, maxDeg, dmax, critOrder)
uMin, uMax, vMin, vMax = srf.GetObject().Bounds()
face = BRepBuilderAPI_MakeFace(plate.Surface(), uMin, uMax, vMin, vMax)
face.Build()
display.DisplayShape(face.Shape())
display.DisplayShape(bladeSurface)
start_display()# -*- coding: utf-8 -*-
from OCC.Utils.DataExchange.STEP import *
from OCC.Utils.Topology import *
from OCC.BRepBuilderAPI import *
from OCC.GeomPlate import *
from OCC.BRepAdaptor import *
from OCC.BRepFill import *
from OCC.GeomFill import *
from OCC.GeomAdaptor import *
import OCC.BRep
from OCC.GeomConvert import *
from OCC.Convert import *
from OCC.GeomFill import *
from OCC.Display.SimpleGui import *
display, start_display, add_menu, add_function_to_menu = init_display()
# ================================================================
# STEP IMPORT
BladeImporter = STEPImporter("blade.stp")
BladeImporter.ReadFile()
shapeList = BladeImporter.GetShapes()
bladeSurface = shapeList[0]
display.DisplayShape(bladeSurface)
# ================================================================
## GETTING BLADE EDGES + WIRES:
topoBlade = Topo(bladeSurface)
bladeFace = topoBlade.faces().next()
edges = []
for edge in topoBlade.edges_from_face(bladeFace):
edges.append(edge)
## Creating wires:
bladeShroudEdge = edges[2]
bladeHubEdge = edges[0]
bladeShroudEdge.Reverse()
bladeShroudWire = BRepBuilderAPI_MakeWire(bladeShroudEdge).Wire()
bladeHubWire = BRepBuilderAPI_MakeWire(bladeHubEdge).Wire()
# ================================================================
# CONSTRAINED FILLING:
breptool = OCC.BRep.BRep_Tool()
profileCurve = breptool.Curve(bladeHubEdge)
# Convert curve to bspline:
SPL = GeomConvert().CurveToBSplineCurve(profileCurve[0], Convert.Convert_TgtThetaOver2 )
spl1_adap_h = GeomAdaptor_HCurve(SPL).GetHandle()
b1 = GeomFill_SimpleBound(spl1_adap_h, 0.001, 0.001).GetHandle()
topoBladeHubEdge = Topo(bladeHubEdge)
v2 = topoBladeHubEdge.vertices().next()
pnt = breptool.Pnt(v2)
b2 = GeomFill_DegeneratedBound(pnt, 0, 0, 1e-4, 1e-4).GetHandle()
b3 = GeomFill_DegeneratedBound(pnt, 0, 0, 1e-4, 1e-4).GetHandle()
b4 = GeomFill_DegeneratedBound(pnt, 0, 0, 1e-4, 1e-4).GetHandle()
bConstrainedFilling = GeomFill_ConstrainedFilling(4, 2)
print 'line before segfault'
bConstrainedFilling.Init(b1,b2,b3,b4,False)
print 'line after segfault'
#bConstrainedFilling.Init(b1,b1,b1)
srf1 = bConstrainedFilling.Surface()
f = BRepBuilderAPI_MakeFace(srf1)
f.Build()
shp = f.Shape()
display.DisplayShape(shp)
start_display()ISO-10303-21;
HEADER;
FILE_DESCRIPTION(('Open CASCADE Model'),'2;1');
FILE_NAME('Open CASCADE Shape Model','2011-01-13T19:12:17',('Author'),(
'Open CASCADE'),'Open CASCADE STEP processor 6.3','Open CASCADE 6.3'
,'Unknown');
FILE_SCHEMA(('AUTOMOTIVE_DESIGN_CC2 { 1 2 10303 214 -1 1 5 4 }'));
ENDSEC;
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END-ISO-10303-21;
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