102c16c14e
* Add Black formatting check to CI * Add some documentation for code contributors * Use uncompromised code formatting
71 lines
1.6 KiB
Python
71 lines
1.6 KiB
Python
# This script can create any regular rectangular Lego(TM) Brick
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import cadquery as cq
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#####
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# Inputs
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######
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lbumps = 1 # number of bumps long
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wbumps = 1 # number of bumps wide
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thin = True # True for thin, False for thick
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#
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# Lego Brick Constants-- these make a lego brick a lego :)
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#
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pitch = 8.0
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clearance = 0.1
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bumpDiam = 4.8
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bumpHeight = 1.8
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if thin:
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height = 3.2
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else:
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height = 9.6
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t = (pitch - (2 * clearance) - bumpDiam) / 2.0
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postDiam = pitch - t # works out to 6.5
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total_length = lbumps * pitch - 2.0 * clearance
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total_width = wbumps * pitch - 2.0 * clearance
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# make the base
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s = cq.Workplane("XY").box(total_length, total_width, height)
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# shell inwards not outwards
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s = s.faces("<Z").shell(-1.0 * t)
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# make the bumps on the top
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s = (
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s.faces(">Z")
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.workplane()
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.rarray(pitch, pitch, lbumps, wbumps, True)
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.circle(bumpDiam / 2.0)
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.extrude(bumpHeight)
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)
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# add posts on the bottom. posts are different diameter depending on geometry
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# solid studs for 1 bump, tubes for multiple, none for 1x1
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tmp = s.faces("<Z").workplane(invert=True)
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if lbumps > 1 and wbumps > 1:
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tmp = (
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tmp.rarray(pitch, pitch, lbumps - 1, wbumps - 1, center=True)
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.circle(postDiam / 2.0)
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.circle(bumpDiam / 2.0)
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.extrude(height - t)
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)
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elif lbumps > 1:
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tmp = (
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tmp.rarray(pitch, pitch, lbumps - 1, 1, center=True)
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.circle(t)
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.extrude(height - t)
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)
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elif wbumps > 1:
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tmp = (
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tmp.rarray(pitch, pitch, 1, wbumps - 1, center=True)
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.circle(t)
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.extrude(height - t)
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)
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else:
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tmp = s
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# Render the solid
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show_object(tmp)
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