d5ce1321ca
* Added AreaNthSelector Added AreaNthSelector that is useful for nested features selection. Especially to select one of coplanar nested wires for subsequent extrusion, cutting or filleting. * LengthNthSelector * Explicitly marked _NthSelector class and _NthSelector.key(..) method as abstract using standard abc package * AreaNthSelector ignores "bad" Wires AreaNthSelector.key raises ValueError if temporary face creation fails for a wire for any reason (non-planar, non-closed). That causes _NthSelector that it inherits to ignore such wires. Done so for consistency with RadiusNthSelector that ignores anything it can not get radius from. Co-authored-by: Marcus Boyd <mwb@geosol.com.au>
48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
import cadquery as cq
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from cadquery.selectors import AreaNthSelector
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case_bottom = (
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cq.Workplane("XY")
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.rect(20, 20)
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.extrude(10) # solid 20x20x10 box
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.edges("|Z or <Z")
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.fillet(2) # rounding all edges except 4 edges of the top face
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.faces(">Z")
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.shell(2) # shell of thickness 2 with top face open
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.faces(">Z")
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.wires(AreaNthSelector(-1)) # selecting top outer wire
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.toPending()
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.workplane()
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.offset2D(-1) # creating centerline wire of case seam face
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.extrude(1) # covering the sell with temporary "lid"
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.faces(">Z[-2]")
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.wires(AreaNthSelector(0)) # selecting case crossection wire
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.toPending()
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.workplane()
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.cutBlind(2) # cutting through the "lid" leaving a lip on case seam surface
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)
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# similar process repeated for the top part
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# but instead of "growing" an inner lip
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# material is removed inside case seam centerline
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# to create an outer lip
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case_top = (
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cq.Workplane("XY")
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.move(25)
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.rect(20, 20)
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.extrude(5)
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.edges("|Z or >Z")
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.fillet(2)
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.faces("<Z")
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.shell(2)
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.faces("<Z")
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.wires(AreaNthSelector(-1))
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.toPending()
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.workplane()
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.offset2D(-1)
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.cutBlind(-1)
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)
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show_object(case_bottom)
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show_object(case_top, options={"alpha": 0.5})
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