74 lines
2.5 KiB
Plaintext
74 lines
2.5 KiB
Plaintext
// Lego Brick
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// A standard Lego brick. This is a small, plastic construction block toy that can be interlocked with other blocks to build various structures, models, and figures. There are a lot of hacks used in this code.
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// Set Units
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@settings(defaultLengthUnit = in)
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// Define constants
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lbumps = 4 // number of bumps long
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wbumps = 2 // number of bumps wide
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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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height = 3.2
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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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totalLength = lbumps * pitch - (2.0 * clearance)
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totalWidth = wbumps * pitch - (2.0 * clearance)
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// Calculate the number of segments in the length and width
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lSegments = totalLength / lbumps
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wSegments = totalWidth / wbumps
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// Add assertions to ensure that the number of bumps are greater than 1
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assertGreaterThan(lbumps, 1, "lbumps must be greater than 1")
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assertGreaterThan(wbumps, 1, "wbumps must be greater than 1")
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// Make the base
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base = startSketchOn(XY)
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|> startProfileAt([-totalWidth / 2, -totalLength / 2], %)
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|> line(end = [totalWidth, 0])
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|> line(end = [0, totalLength])
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|> line(end = [-totalWidth, 0])
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|> close()
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|> extrude(length = height)
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// Sketch and extrude a rectangular shape to create the shell underneath the lego. Will replace with shell function when able to call a face created from shell.
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shellExtrude = startSketchOn(base, "start")
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|> startProfileAt([
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-(totalWidth / 2 - t),
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-(totalLength / 2 - t)
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], %)
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|> line(end = [totalWidth - (2 * t), 0])
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|> line(end = [0, totalLength - (2 * t)])
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|> line(end = [-(totalWidth - (2 * t)), 0])
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|> close()
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|> extrude(length = -(height - t))
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// Create the pegs on the top of the base
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peg = startSketchOn(base, 'end')
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|> circle(
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center = [
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-(pitch * (wbumps - 1) / 2),
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-(pitch * (lbumps - 1) / 2)
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],
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radius = bumpDiam / 2,
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)
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|> patternLinear2d(axis = [1, 0], instances = wbumps, distance = pitch)
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|> patternLinear2d(axis = [0, 1], instances = lbumps, distance = pitch)
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|> extrude(length = bumpHeight)
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// Create the pegs on the bottom of the base
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tubePattern = startSketchOn(shellExtrude, 'start')
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|> circle(
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center = [
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-(pitch * (wbumps - 1) / 2 - (pitch / 2)),
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-(pitch * (lbumps - 1) / 2 - (pitch / 2))
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],
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radius = bumpDiam / 2,
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)
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|> patternLinear2d(axis = [1, 0], instances = wbumps - 1, distance = pitch)
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|> patternLinear2d(axis = [0, 1], instances = lbumps - 1, distance = pitch)
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|> extrude(length = bumpHeight)
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