102c16c14e
* Add Black formatting check to CI * Add some documentation for code contributors * Use uncompromised code formatting
37 lines
1.5 KiB
Python
37 lines
1.5 KiB
Python
import cadquery as cq
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# These can be modified rather than hardcoding values for each dimension.
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# Define up our Length, Height, Width, and thickness of the beam
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(L, H, W, t) = (100.0, 20.0, 20.0, 1.0)
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# Define the points that the polyline will be drawn to/thru
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pts = [
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(W / 2.0, H / 2.0),
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(W / 2.0, (H / 2.0 - t)),
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(t / 2.0, (H / 2.0 - t)),
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(t / 2.0, (t - H / 2.0)),
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(W / 2.0, (t - H / 2.0)),
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(W / 2.0, H / -2.0),
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(0, H / -2.0),
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]
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# We generate half of the I-beam outline and then mirror it to create the full
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# I-beam.
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# 1. Establishes a workplane that an object can be built on.
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# 1a. Uses the named plane orientation "front" to define the workplane, meaning
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# that the positive Z direction is "up", and the negative Z direction
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# is "down".
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# 2. moveTo() is used to move the first point from the origin (0, 0) to
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# (0, 10.0), with 10.0 being half the height (H/2.0). If this is not done
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# the first line will start from the origin, creating an extra segment that
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# will cause the extrude to have an invalid shape.
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# 3. The polyline function takes a list of points and generates the lines
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# through all the points at once.
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# 3. Only half of the I-beam profile has been drawn so far. That half is
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# mirrored around the Y-axis to create the complete I-beam profile.
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# 4. The I-beam profile is extruded to the final length of the beam.
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result = cq.Workplane("front").moveTo(0, H / 2.0).polyline(pts).mirrorY().extrude(L)
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# Displays the result of this script
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show_object(result)
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