57 lines
1.4 KiB
Plaintext
57 lines
1.4 KiB
Plaintext
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// Lego Brick
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const lbumps = 10 // number of bumps long
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const wbumps = 6 // number of bumps wide
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const pitch = 8.0
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const clearance = 0.1
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const bumpDiam = 4.8
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const bumpHeight = 1.8
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const height = 3.2
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const t = (pitch - (2 * clearance) - bumpDiam) / 2.0
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const postDiam = pitch - t // works out to 6.5
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const total_length = lbumps * pitch - (2.0 * clearance)
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const total_width = wbumps * pitch - (2.0 * clearance)
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const lSegments = total_length / (lbumps + 1)
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const wSegments = total_width / (wbumps + 1)
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// make the base
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const s = startSketchOn('XY')
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|> startProfileAt([-total_width / 2, -total_length / 2], %)
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|> line([total_width, 0], %)
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|> line([0, total_length], %)
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|> line([-total_width, 0], %)
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|> close(%)
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|> extrude(height, %)
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const shellExtrude = startSketchOn(s, "start")
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|> startProfileAt([
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-(total_width / 2 - t),
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-(total_length / 2 - t)
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], %)
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|> line([total_width - (2 * t), 0], %)
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|> line([0, total_length - (2 * t)], %)
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|> line([-(total_width - (2 * t)), 0], %)
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|> close(%)
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|> extrude(-(height - t), %)
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const peg = startSketchOn(s, "end")
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|> circle([
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-(total_width / 2 - wSegments),
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-(total_length / 2 - lSegments)
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], bumpDiam / 2, %)
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|> patternLinear2d({
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axis: [1, 0],
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repetitions: 5,
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distance: 7
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}, %)
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|> patternLinear2d({
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axis: [0, 1],
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repetitions: 9,
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distance: 7
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}, %)
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|> extrude(bumpHeight, %)
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