31 lines
802 B
Markdown
31 lines
802 B
Markdown
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---
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title: Storing the seam length to use in another part
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for: developers
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about: Shows how to store a seam length so you can true the seam of another part
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---
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<Note>
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##### See this example in our source code
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- [packages/aaron/src/front.js](https://github.com/freesewing/freesewing/blob/develop/packages/aaron/src/front.js#L103)
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</Note>
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Often when designing patterns, we need to _true a seam_ which means to make sure
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that two parts that need to be joined together are the same distance.
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The example below is from Aaron and stores the length of the armhole seam:
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```js
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// Store length of armhole and neck opening
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store.set(
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'frontArmholeLength',
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new Path()
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.move(points.armhole)
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.curve(points.armholeCp2, points.strapRightCp1, points.strapRight)
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.length()
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)
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```
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