6ac9c49773
Right now, if you model something like this box with a button: <img width="413" alt="Screenshot 2025-02-06 at 3 08 03 PM" src="https://github.com/user-attachments/assets/04818a70-7cf3-4ee3-b8c5-df5959ac10db" /> Let's say you want to pattern the button, and repeat it a second time. If you try, you'll actually pattern the entire model (box + button). <img width="486" alt="Screenshot 2025-02-06 at 3 08 52 PM" src="https://github.com/user-attachments/assets/09fc28d9-5d80-4ab3-b4dc-b8de2945fcba" /> Why? Because right now, when you sketch on a face (like the button was), both the box and the button share the same ID. All extrusions from a solid will share the same ID, because they all refer to the same composite solid. This is helpful in some ways -- arguably the solid _is_ just one big complex shape now -- but it's not helpful in other ways. What if I want to only pattern the button? Luckily there's an original ID for the button part, which is still stored. So we just need a way to tell the pattern stdlib functions whether to use the target's main ID or its original ID. This PR adds a new optional bool, `useOriginal`, to patterns. It's false by default, to keep backwards-compatibility (make sure that old KCL code doesn't change). This PR is based on https://github.com/KittyCAD/modeling-app/pull/3914. It's based on work Serena and I are doing to fix a bug (engine does not allow patterning a 3D solid which was sketched on a face of another solid). @gserena01 our test program is now: ``` w = 400 case = startSketchOn('XY') |> startProfileAt([-w, -w], %) |> line(endAbsolute = [-w, w]) |> line(endAbsolute = [w, -w]) |> line(endAbsolute = [-w, -w]) |> close() |> extrude(length = 200) bump1 = startSketchOn(case, 'end') |> circle({ center = [-50, -50], radius = 40 }, %) |> extrude(length = 20) // We pass in "bump1" here since we want to pattern just this object on the face. useOriginal = true target = bump1 transform = { axis = [1, 0, 0], instances = 3, distance = -100 } patternLinear3d(transform, target, useOriginal) ``` If you change the `useOriginal = true` to `false` you can see the difference.
46 lines
63 KiB
Markdown
46 lines
63 KiB
Markdown
---
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title: "patternLinear2d"
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excerpt: "Repeat a 2-dimensional sketch along some dimension, with a dynamic amount"
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layout: manual
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---
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Repeat a 2-dimensional sketch along some dimension, with a dynamic amount
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of distance between each repetition, some specified number of times.
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```js
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patternLinear2d(data: LinearPattern2dData, sketch_set: SketchSet, use_original?: bool) -> [Sketch]
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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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| `data` | [`LinearPattern2dData`](/docs/kcl/types/LinearPattern2dData) | Data for a linear pattern on a 2D sketch. | Yes |
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| `sketch_set` | [`SketchSet`](/docs/kcl/types/SketchSet) | A sketch or a group of sketches. | Yes |
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| `use_original` | `bool` | | No |
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### Returns
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[`[Sketch]`](/docs/kcl/types/Sketch)
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### Examples
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```js
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exampleSketch = startSketchOn('XZ')
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|> circle({ center = [0, 0], radius = 1 }, %)
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|> patternLinear2d({
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axis = [1, 0],
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instances = 7,
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distance = 4
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}, %)
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example = extrude(exampleSketch, length = 1)
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```
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