Objects selection on sketches

[Jojain]

It is not possible to selects objects if the object on the stack is a sketch

s = Sketch().rect(10,5)
b = Workplane().placeSketch(s).wires()
print(b.ctx.pendingWires) # return []

I needed this because in order to loft several sketchs I need to push their wires onto the context otherwise they arent usable anymore after workplane offsettings.

I think this should also be an issue, I feel it should be possible to do :

s = Sketch().rect(10,5)
b = Workplane().placeSketch(s).workplane(10).placeSketch(s).loft()

It would probably be a huge refactor but I think while they arent used for any 3D operations, Sketchs should be available from the context. Once they are used they should be tagged as so and so they wouldn't be reused by other 3D ops later on the stack.

[gumyr]

As a workaround, this works for me:

        cup = Workplane(
            cup_sketch._faces.Faces()[0].rotate(Vector(), Vector(0, 1, 0), -90)
        ).wires()

Lofting sketches is shown in the docs:

from cadquery import Workplane, Sketch, Vector, Location

s1 = (
     Sketch()
     .trapezoid(3,1,110)
     .vertices()
     .fillet(0.2)
     )

s2 = (
     Sketch()
     .rect(2,1)
     .vertices()
     .fillet(0.2)
     )

result = (
    Workplane()
    .placeSketch(s1, s2.moved(Location(Vector(0, 0, 3))))
    .loft()
    )

[jdegenstein]

Building on Jojain's issue above, I have also noticed that loft() does not seem to accept a mixture of Sketches and wires. According to gumyr, I believe this may result from the sketch not being cast into a wire?

base = 23
crad = 6

def base_sketch_wire(self,scale=1): #hacky stuff to convert sketch to a wire
    w = self.sketch().rect(scale*base,scale*base).vertices().fillet(scale*crad)._faces.Faces()[0].outerWire()
    return self.eachpoint(lambda loc: w.moved(loc), True)

cq.Workplane.base_sketch_wire = base_sketch_wire

s1 = (cq.Sketch()
  .rect(base,base)
  .vertices()
  .fillet(crad)
  )

s2 = (cq.Sketch()
  .rect(.75*base,.75*base)
  .vertices()
  .fillet(crad)
  )

#taken from docs, and works correctly
f1 = (cq.Workplane()
  .placeSketch(s1,s2.moved(Location(Vector(0, 0, 7))))
  .loft()
  )

#does NOT work
f2 = (cq.Workplane()
  .placeSketch(s1)
  .workplane()
  .transformed(offset=cq.Vector(0,0,5))
  .placeSketch(s2)
  .loft()
  )

#works with hacky function to convert sketch to wire
f3 = (cq.Workplane()
  .base_sketch_wire(1)
  .workplane()
  .transformed(offset=cq.Vector(0,0,5))
  .base_sketch_wire(.75)
  .loft()
  )

#does not work
f4 = (cq.Workplane()
  .placeSketch(s1)
  .workplane()
  .transformed(offset=cq.Vector(0,0,5))
  .base_sketch_wire(.75)
  .loft()
  )