freesewing/designs/noble/src/backInside.mjs

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


  if( options.dartPosition != 'shoulder' ) {
    paths.insideSeam = paths.seam.clone().setRender(true)
  } else {
    // Hide Bella paths
    for (let key of Object.keys(paths)) paths[key].render = false
    for (let i in snippets) delete snippets[i]

    paths.insideSeam = new Path()
      .move(points.cbNeck)
      .curve_(points.cbNeckCp2, points.waistCenter)
      .line(points.dartBottomLeft)
      .curve(points.dartLeftCp, points.shoulderDartCpDown, points.dartTip)
      .curve(points.shoulderDartCpUp, points.shoulderDart, points.shoulderDart)
      .line(points.hps)
      ._curve(points.cbNeckCp1, points.cbNeck)
      .close()
      .attr('class', 'fabric')
  }

  if (complete) {
    snippets.dartTip = new Snippet('notch', points.dartTip)

    macro('title', {
      at: points.titleAnchor,
      nr: 3,
      title: ( options.dartPosition != 'shoulder' ? 'Back' : 'Inside Back' )
    })
    macro("grainline", {
      from: points.grainlineFrom,
      to: points.grainlineTo,
    })

    if (sa) paths.sa = paths.insideSeam.offset(sa).attr('class', 'fabric sa')

    if( paperless ) {
      if( options.dartPosition == 'shoulder' ) {
        points.shoulderPoint = points.shoulderDart.clone()
      } else {
        points.shoulderPoint = points.shoulder.clone()
      }
      macro('hd', {
        from: points.waistCenter,
        to: points.shoulderPoint,
        y: points.waistCenter.y +sa + 15,
      })
      macro('hd', {
        from: points.waistCenter,
        to: points.dartTip,
        y: points.waistCenter.y +sa + 25,
      })
      macro('hd', {
        from: points.waistCenter,
        to: points.dartBottomLeft,
        y: points.waistCenter.y +sa + 35,
      })
      macro('hd', {
        from: points.cbNeck,
        to: points.dartBottomLeft,
        y: points.waistCenter.y +sa + 45,
      })
      macro('hd', {
        from: points.cbNeck,
        to: points.hps,
        y: points.hps.y -sa - 15,
      })
      macro('hd', {
        from: points.hps,
        to: points.shoulderPoint,
        y: points.hps.y -sa - 15,
      })
      if( options.dartPosition != 'shoulder' ) {
        macro('hd', {
          from: points.dartTip,
          to: points.waistSide,
          y: points.waistCenter.y +sa + 25,
        })
        macro('hd', {
          from: points.dartBottomRight,
          to: points.waistSide,
          y: points.waistCenter.y +sa + 35,
        })
        macro('hd', {
          from: points.dartBottomRight,
          to: points.armhole,
          y: points.waistCenter.y +sa + 45,
        })
      }

      let extraOffset = 0
      if( options.dartPosition != 'shoulder' ) {
        macro('vd', {
          from: points.shoulderPoint,
          to: points.waistSide,
          x: points.shoulderPoint.x +sa + 25,
        })
        macro('vd', {
          from: points.armhole,
          to: points.waistSide,
          x: points.shoulderPoint.x +sa + 15,
        })
        extraOffset = 10
      }

      macro('vd', {
        from: points.shoulderPoint,
        to: points.dartTip,
        x: points.shoulderPoint.x +sa + 15,
      })
      macro('vd', {
        from: points.shoulderPoint,
        to: points.dartBottomLeft,
        x: points.shoulderPoint.x +sa + 25 +extraOffset,
      })
      macro('vd', {
        from: points.shoulderPoint,
        to: points.waistCenter,
        x: points.shoulderPoint.x +sa + 35 +extraOffset,
      })
      macro('vd', {
        from: points.hps,
        to: points.waistCenter,
        x: points.shoulderPoint.x +sa + 45 +extraOffset,
      })
      macro('vd', {
        from: points.waistCenter,
        to: points.cbNeck,
        x: points.cbNeck.x -sa - 15,
      })
      macro('vd', {
        from: points.waistCenter,
        to: points.hps,
        x: points.cbNeck.x -sa - 25,
      })
    }
  }

  return part
}