def getTestFace():
P1 = gp_Pnt(0., 0., 0.)
P12 = gp_Pnt(0., 2., 2.)
P2 = gp_Pnt(0., 10., 0.)
P3 = gp_Pnt(0., 10., 10.)
P4 = gp_Pnt(0., 0., 10.)
P5 = gp_Pnt(5., 5., 5.)
SceneDrawPoint('p1', P1)
SceneDrawPoint('p12', P12)
SceneDrawPoint('p2', P2)
SceneDrawPoint('p3', P3)
SceneDrawPoint('p4', P4)
SceneDrawPoint('p5', P5)
W = BRepBuilderAPI_MakePolygon()
W.Add(P1)
W.Add(P12)
W.Add(P2)
W.Add(P3)
W.Add(P4)
W.Add(P1)
SceneDrawShape('w', W.Shape())
# Initialize a BuildPlateSurface
BPSurf = GeomPlate_BuildPlateSurface(3, 15, 2)
# Create the curve constraints
anExp = BRepTools_WireExplorer()
anExp.Init(W.Wire())
while anExp.More():
E = anExp.Current()
C = BRepAdaptor_HCurve()
C.ChangeCurve().Initialize(E)
Cont = BRepFill_CurveConstraint(C, 0)
BPSurf.Add(Cont)
anExp.Next()
# Point constraint
PCont = GeomPlate_PointConstraint(P5, 0)
BPSurf.Add(PCont)
# Compute the Plate surface
BPSurf.Perform()
# Approximation of the Plate surface
MaxSeg = 9
MaxDegree = 8
CritOrder = 0
PSurf = BPSurf.Surface()
dmax = max(0.0001, 10 * BPSurf.G0Error())
Tol = 0.0001
Mapp = GeomPlate_MakeApprox(PSurf, Tol, MaxSeg, MaxDegree, dmax, CritOrder)
Surf = Mapp.Surface()
# create a face corresponding to the approximated Plate Surface
Umin, Umax, Vmin, Vmax = PSurf.Bounds()
#MF = BRepBuilderAPI_MakeFace (Surf, Umin, Umax, Vmin, Vmax, Tol)
MF = BRepBuilderAPI_MakeFace(Surf, Tol)
return MF
def build_plate(polygon, points):
'''
build a surface from a constraining polygon(s) and point(s)
@param polygon: list of polygons ( TopoDS_Shape)
@param points: list of points ( gp_Pnt )
'''
# plate surface
bpSrf = GeomPlate_BuildPlateSurface(3, 15, 2)
# add curve constraints
for poly in polygon:
for edg in WireExplorer(poly).ordered_edges():
c = BRepAdaptor_HCurve()
c.ChangeCurve().Initialize(edg)
constraint = BRepFill_CurveConstraint(c.GetHandle(), 0)
bpSrf.Add(constraint.GetHandle())
# add point constraint
for pt in points:
bpSrf.Add(GeomPlate_PointConstraint(pt, 0).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()
return make_face(plate.Surface(), uMin, uMax, vMin, vMax, 1e-4)