To OCC shapes

Faces, wires and sketches become OpenCASCADE shapes with exact lines, arcs, full circles and B-splines, shared vertices, names and colors. The export needs OpenCASCADE through netgen.occ (pip install netgen-mesher, which brings OpenCASCADE as netgen-occt). On the way out, the export can apply everything that Simplify does. See Defeaturing for details.

The rocket example is revolved, lofted and extruded from planex2d sketches.

The example is a plate 4 × 2 with a bore of radius 0.5, with its outline and bore named (Figure 1):

import planex as px

plate = px.QuickSketch((-2, -1)).Rectangle(4, 2, name="outline").Face()
part = plate - px.QuickSketch().Circle(0.5, name="bore").Face()
shape = part.ToOCCShape()
print(len(shape.edges), "edges:", sorted({e.name for e in shape.edges}))

5 edges: ['bore', 'outline']

Figure 1: A plate with a named bore

Faces and wires

A face, its wires, or a wire on its own can each be exported as OpenCASCADE objects. The example exports the plate as a face and as its wires, and a slot of width 1 along a spine of 3 as one wire:

face = part.ToOCCFace()
wires = part.ToOCCWires()
slot = px.QuickSketch().Slot(3, 1).Wire().ToOCCWire()
print(type(face).__name__, len(wires.edges), len(slot.edges))

Face 5 4

Everything at a glance

Object	ToOCCShape() gives	Also
Face	The face	ToOCCFace, ToOCCWire, ToOCCWires
Wire	Its wires	ToOCCWire, ToOCCWires, ToOCCFace
Sketch	The face of everything drawn	ToOCCFace, ToOCCWire, ToOCCWires
Compound	Faces and wires glued together