Tube

Now test function to make a tube generated along the z-axis

def tube(r, w, h, a ):
   '''
   Generate a (partial) tube with
   r  outside radius
   w  wall thickness
   h  length (height)
   a  angle of sweep (360 is full circle)
   e.g.
   b = tube(6, 2, 10, 90)
   '''
   b = Part.makeCylinder(r, h, Vector(0,0,0), Vector(0,0,1), a)
   b = b.cut(Part.makeCylinder(r-w, h, Vector(0,0,0), Vector(0,0,1), a))

   return(b)

Outside 6, wall 2, length 10, angle of sweep 360 (round tube)

tb = tube( 6, 2, 10, 360)
tb2 = tb.copy()
tb2.rotate(o, z, 30)
testEqual(tb,  tb2)   # symmetric normal to z-axis
tb2.rotate(o, x, 30)
testNotEqual(tb,  tb2)  # not symmetric normal to x-axis

TEST generate a tube by revolving a rectangle (vs cutting two cylindars above)

# edge1 = Part.makeLine((0,0,0), (10,0,0))

rect = Part.makePolygon([
     Vector(4,0,0), Vector(6,0,0),Vector(6,0,10),Vector(4,0,10), Vector(4,0,0)])

rectFace = Part.makeFilledFace(rect.Edges)

tb3 = rectFace.revolve(o, z, 360)
# Part.show(tb3)
testEqual(tb,  tb3)

# outside 6,  wall 2, length 10, angle of sweep  90 (1/4 round)

tb = tube( 6, 2, 10, 90)
testEqual(tb,  tube(6, 2, 10, 90))
testNotEqual(tb, tube(6, 2, 10, 80))

line = Part.LineSegment(o, Vector(10,0,0))
edge = line.toShape()

if edge.Length != 10.0 : print('bad')

if edge.CenterOfMass != Vector (5, 0, 0) : print('bad')


edge1 = Part.makeLine((0,0,0), (10,0,0))
edge2 = Part.makeLine((10,0,0), (10,10,0))
wire1 = Part.Wire([edge1,edge2])
edge3 = Part.makeLine((10,10,0), (0,10,0))
edge4 = Part.makeLine((0,10,0), (0,0,0))
wire2 = Part.Wire([edge3,edge4])
wire3 = Part.Wire([wire1,wire2])
wire3.Edges

#Part.show(wire3)