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freesewing/markdown/dev/howtos/design/slash-spread/en.md
nikhil 0becd057b2 fix: Broken/misleading links to designs' source code
Some of these links were actually broken, since they expect to find designs under the `packages/` directory in the current `develop` branch. Other links were technically okay, since they link to old commits, but updating those links may still help to reduce confusion.

Also fix a reference to `packages/unice` in a `netlify.toml` file. (Untested, but I don't think this is an actual Netlify configuration.)
2022-08-21 12:31:23 -04:00

1 KiB

title for about
Slash and spread developers Slash and spread is easy enough on paper, here's how to do it in code
See this example in our source code

When we slash and spread a pattern, we cut out a triangle, and then rotate it around the tip of the triangle.

And that's exactly what we do in code. We just need to know:

  • What point we want to rotate around
  • Which points we want to rotate
  • By how much we want to rotate
let rotate = [
  'splitEdge',
  'neckEdge',
  'cfNeck',
  'cfNeckCp1',
  'neckCp2Front',
  'neck',
  'shoulder',
  'shoulderCp1',
  'armholePitchCp2',
  'armholePitch',
  'armholePitchCp1',
  'armholeHollowCp2',
  'armholeHollow',
  'armholeHollowCp1',
  'splitCp2',
  'frontNeckCpEdge'
]
for (let p of rotate) {
  points[p] = points[p].rotate(options.chestShapingMax * options.chestShaping * -1, points.split)
}