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modeling-app/docs/kcl/std-solid-hollow.md
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Signed-off-by: Nick Cameron <nrc@ncameron.org>
2025-04-30 16:03:22 +00:00

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std::solid::hollow Make the inside of a 3D object hollow. manual

Make the inside of a 3D object hollow.

Remove volume from a 3-dimensional shape such that a wall of the provided thickness remains around the exterior of the shape.

hollow(
  @solid: [Solid](/docs/kcl/types/Solid),
  thickness: [number](/docs/kcl/types/number)(Length),
): [Solid](/docs/kcl/types/Solid)

Arguments

Name Type Description Required
solid Solid Which solid to hollow out Yes
thickness number(Length) The thickness of the remaining shell Yes

Returns

Solid

Examples

// Hollow a basic sketch.
firstSketch = startSketchOn(XY)
    |> startProfile(at = [-12, 12])
    |> line(end = [24, 0])
    |> line(end = [0, -24])
    |> line(end = [-24, 0])
    |> close()
    |> extrude(length = 6)
    |> hollow (thickness = 0.25)

Rendered example of std::solid::hollow 0

// Hollow a basic sketch.
firstSketch = startSketchOn(-XZ)
    |> startProfile(at = [-12, 12])
    |> line(end = [24, 0])
    |> line(end = [0, -24])
    |> line(end = [-24, 0])
    |> close()
    |> extrude(length = 6)
    |> hollow (thickness = 0.5)

Rendered example of std::solid::hollow 1

// Hollow a sketch on face object.
size = 100
case = startSketchOn(-XZ)
    |> startProfile(at = [-size, -size])
    |> line(end = [2 * size, 0])
    |> line(end = [0, 2 * size])
    |> tangentialArc(endAbsolute = [-size, size])
    |> close()
    |> extrude(length = 65)

thing1 = startSketchOn(case, face = END)
    |> circle( center = [-size / 2, -size / 2], radius = 25 )
    |> extrude(length = 50)

thing2 = startSketchOn(case, face = END)
    |> circle( center = [size / 2, -size / 2], radius = 25 )
    |> extrude(length = 50)

hollow(case, thickness = 0.5)

Rendered example of std::solid::hollow 2