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89 lines
303 KiB
Markdown
89 lines
303 KiB
Markdown
---
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title: "hollow"
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excerpt: "Make the inside of a 3D object hollow."
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layout: manual
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---
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Make the inside of a 3D object hollow.
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Remove volume from a 3-dimensional shape such that a wall of the provided thickness remains around the exterior of the shape.
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```js
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hollow(thickness: number, solid: Solid) -> Solid
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```
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### Arguments
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| Name | Type | Description | Required |
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|----------|------|-------------|----------|
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| `thickness` | `number` | | Yes |
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| `solid` | [`Solid`](/docs/kcl/types/Solid) | An solid is a collection of extrude surfaces. | Yes |
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### Returns
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[`Solid`](/docs/kcl/types/Solid) - An solid is a collection of extrude surfaces.
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### Examples
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```js
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// Hollow a basic sketch.
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const firstSketch = startSketchOn('XY')
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|> startProfileAt([-12, 12], %)
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|> line([24, 0], %)
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|> line([0, -24], %)
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|> line([-24, 0], %)
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|> close(%)
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|> extrude(6, %)
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|> hollow(0.25, %)
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```
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```js
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// Hollow a basic sketch.
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const firstSketch = startSketchOn('-XZ')
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|> startProfileAt([-12, 12], %)
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|> line([24, 0], %)
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|> line([0, -24], %)
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|> line([-24, 0], %)
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|> close(%)
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|> extrude(6, %)
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|> hollow(0.5, %)
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```
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```js
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// Hollow a sketch on face object.
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let size = 100
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const case = startSketchOn('-XZ')
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|> startProfileAt([-size, -size], %)
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|> line([2 * size, 0], %)
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|> line([0, 2 * size], %)
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|> tangentialArcTo([-size, size], %)
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|> close(%)
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|> extrude(65, %)
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const thing1 = startSketchOn(case, 'end')
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|> circle({
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center: [-size / 2, -size / 2],
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radius: 25
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}, %)
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|> extrude(50, %)
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const thing2 = startSketchOn(case, 'end')
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|> circle({
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center: [size / 2, -size / 2],
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radius: 25
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}, %)
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|> extrude(50, %)
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hollow(0.5, case)
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```
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