ab3204f9f1
The replaces the NextJS site powering FreeSewing.dev with a Docusaurus setup. It's part of my efforts to simplify FreeSewing's setup so we can focus on our core value proposition.
54 lines
1.4 KiB
Text
54 lines
1.4 KiB
Text
---
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title: Add seam allowance and/or hem allowance
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---
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Adding seam allowance is something that has to happen in every pattern.
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We might also have a hem where we need to add more seam allowance, or hem allowance.
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When doing this, it's best to split up your path into sections that share the same
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seam allowance.
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In the example below we have two such paths:
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- `paths.saBase` is the path that will require regular seam allowance
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- `paths.hemBase` is the path that will require more seam allowance, or hem allowance
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When creating them, we hide the new paths to avoid drawing the same path multiple times.
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Then we string together our real path and our seam allowance based on them:
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```js
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paths.saBase = new Path()
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.move(points.bottomRight)
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.line(points.tip)
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.curve(points.tipCpBottom, points.tipCpTop, points.topLeft)
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.line(points.bottomLeft)
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.hide()
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paths.hemBase = new Path()
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.move(points.bottomLeft)
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.line(points.bottomRight)
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.hide()
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paths.seam = paths.saBase.join(paths.hemBase)
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.close()
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.attr('class', 'fabric')
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if (complete) {
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if (sa) {
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paths.sa = paths.saBase.offset(sa)
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.join(paths.hemBase.offset(sa * 2))
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.close()
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.attr('class', 'fabric sa')
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}
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// ...
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}
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```
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:::tip
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##### Use a multiple of `sa` for your hem allowance
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Resist the temptation to use an absolute value for any seam allowance, including at the hem.
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Always use a multiple of the `sa` value.
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:::
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