modeling-app/docs/kcl-std/functions/std-solid-hollow.md

title, subtitle, excerpt, layout

title	subtitle	excerpt	layout
hollow	Function in solid	Make the inside of a 3D object hollow.	manual

Make the inside of a 3D object hollow.

hollow(
  @solid: Solid,
  thickness: number(Length),
): Solid

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

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 - A solid is a collection of extrude surfaces.

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)

// 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)

// 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)