freesewing/packages/cornelius/src/zipperguard.js

export default function (part) {
  let { Point, Path, points, paths, Snippet, snippets, complete, sa, store, paperless, macro } =
    part.shorthand()

  const cc = 0.551915024494 // circle constant

    let halfInch = store.get('halfInch')
    let flyWidth = store.get('flyWidth') *halfInch
    let flyLength = store.get('flyLength')

    points.pA = new Point(0, 0)
    points.pB = points.pA.shift(180, flyWidth)
    points.pC = points.pB.shift(270, flyLength -flyWidth)
    points.pD = points.pA.shift(270, flyLength)
    points.pDcpC = points.pD.shift(180, flyWidth * cc)
    points.pCcpD = points.pC.shift(270, flyWidth * cc)

    paths.seam = new Path()
      .move(points.pA)
      .line(points.pB)
      .line(points.pC)
      .curve(points.pCcpD, points.pDcpC, points.pD)
      .attr('class', 'fabric')

    paths.seam2 = new Path().move(points.pD).line(points.pA).attr('class', 'fabric')

    if (complete) {
      macro('cutonfold', {
        from: points.pD,
        to: points.pA,
      })

      points.logo = points.pA.shiftFractionTowards(points.pC, 0.5)
      snippets.logo = new Snippet('logo', points.logo)
      points.title = points.logo.shift(90, 70)
      macro('title', {
        nr: 4,
        at: points.title,
        title: 'ZipperGuard',
      })
      points.__titleNr.attr('data-text-class', 'center')
      points.__titleName.attr('data-text-class', 'center')
      points.__titlePattern.attr('data-text-class', 'center')

      if (sa) {
        paths.sa = new Path()
          .move(points.pA)
          .line(points.pA.shift(90, sa))
          .join(paths.seam.offset(sa))
          .line(points.pD)
          .attr('class', 'fabric sa')
      }
    }

    // Paperless?
    if (paperless) {
      macro('hd', {
        from: points.pB,
        to: points.pA,
        y: points.pA.y - sa - 15,
      })
      macro('vd', {
        from: points.pA,
        to: points.pD,
        x: points.pA.x + 15,
      })
    }

    return part
  }