def uniform_scale(occtopology, tx, ty, tz, ref_pypt):
"""
This function uniformly scales an OCCtopology based on the reference point and tx,ty,tz factors.
Parameters
----------
occtopology : OCCtopology
The OCCtopology to be scaled.
OCCtopology includes: OCCshape, OCCcompound, OCCcompsolid, OCCsolid, OCCshell, OCCface, OCCwire, OCCedge, OCCvertex
tx : float
The scale factor in the X-axis.
ty : float
The scale factor in the Y-axis.
tz : float
The scale factor in the Z-axis.
ref_pypt : tuple of floats
The OCCtopology will scale in reference to this point.
A pypt is a tuple that documents the xyz coordinates of a pt e.g. (x,y,z)
Returns
-------
scaled topology : OCCtopology (OCCshape)
The scaled OCCtopology.
"""
moved_shape = move(ref_pypt, (0, 0, 0), occtopology)
xform = gp_GTrsf()
xform.SetVectorialPart(gp_Mat(
tx,
0,
0,
0,
ty,
0,
0,
0,
tz,
))
brep = BRepBuilderAPI_GTransform(xform)
brep.Perform(moved_shape, True)
trsfshape = brep.Shape()
move_back_shp = move((0, 0, 0), ref_pypt, trsfshape)
return move_back_shp
def brep_feat_extrusion_protrusion(event=None):
# Extrusion
S = BRepPrimAPI_MakeBox(400., 250., 300.).Shape()
faces = TopologyExplorer(S).faces()
F = next(faces)
surf1 = BRep_Tool_Surface(F)
Pl1 = Geom_Plane.DownCast(surf1)
D1 = Pl1.Pln().Axis().Direction().Reversed()
MW = BRepBuilderAPI_MakeWire()
p1, p2 = gp_Pnt2d(200., -100.), gp_Pnt2d(100., -100.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW.Add(BRepBuilderAPI_MakeEdge(aline, surf1, 0., p1.Distance(p2)).Edge())
p1, p2 = gp_Pnt2d(100., -100.), gp_Pnt2d(100., -200.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW.Add(BRepBuilderAPI_MakeEdge(aline, surf1, 0., p1.Distance(p2)).Edge())
p1, p2 = gp_Pnt2d(100., -200.), gp_Pnt2d(200., -200.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW.Add(BRepBuilderAPI_MakeEdge(aline, surf1, 0., p1.Distance(p2)).Edge())
p1, p2 = gp_Pnt2d(200., -200.), gp_Pnt2d(200., -100.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW.Add(BRepBuilderAPI_MakeEdge(aline, surf1, 0., p1.Distance(p2)).Edge())
MKF = BRepBuilderAPI_MakeFace()
MKF.Init(surf1, False, 1e-6)
MKF.Add(MW.Wire())
FP = MKF.Face()
breplib_BuildCurves3d(FP)
display.EraseAll()
MKP = BRepFeat_MakePrism(S, FP, F, D1, 0, True)
MKP.PerformThruAll()
res1 = MKP.Shape()
display.DisplayShape(res1)
# Protrusion
next(faces)
F2 = next(faces)
surf2 = BRep_Tool_Surface(F2)
Pl2 = Geom_Plane.DownCast(surf2)
D2 = Pl2.Pln().Axis().Direction().Reversed()
MW2 = BRepBuilderAPI_MakeWire()
p1, p2 = gp_Pnt2d(100., 100.), gp_Pnt2d(200., 100.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW2.Add(BRepBuilderAPI_MakeEdge(aline, surf2, 0., p1.Distance(p2)).Edge())
p1, p2 = gp_Pnt2d(200., 100.), gp_Pnt2d(150., 200.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW2.Add(BRepBuilderAPI_MakeEdge(aline, surf2, 0., p1.Distance(p2)).Edge())
p1, p2 = gp_Pnt2d(150., 200.), gp_Pnt2d(100., 100.)
aline = GCE2d_MakeLine(p1, p2).Value()
MW2.Add(BRepBuilderAPI_MakeEdge(aline, surf2, 0., p1.Distance(p2)).Edge())
MKF2 = BRepBuilderAPI_MakeFace()
MKF2.Init(surf2, False, 1e-6)
MKF2.Add(MW2.Wire())
MKF2.Build()
FP = MKF2.Face()
breplib_BuildCurves3d(FP)
MKP2 = BRepFeat_MakePrism(res1, FP, F2, D2, 0, True)
MKP2.PerformThruAll()
display.EraseAll()
trf = gp_Trsf()
trf.SetTranslation(gp_Vec(0, 0, 300))
gtrf = gp_GTrsf()
gtrf.SetTrsf(trf)
tr = BRepBuilderAPI_GTransform(MKP2.Shape(), gtrf, True)
fused = BRepAlgoAPI_Fuse(tr.Shape(), MKP2.Shape())
fused.Build()
display.DisplayShape(fused.Shape())
display.FitAll()