freesewing/packages/cathrin/src/base.js

export default function(part) {
  // prettier-ignore
  let {measurements, options, store, points, snippets, paths, Point, Snippet, Path, utils, complete, debug } = part.shorthand();

  // Where to divide our corset into panels
  if (options.panels === 11) store.set('gaps', [0.15,0.275,0.4,0.6,0.75]);
  else store.set('gaps', [0.2,0.35,0.5,0.65,0.8]);

  // Absolute values for some options
  store.set('waistReduction', measurements.naturalWaist * options.waistReduction);
  debug({
    type: "info",
    label: '✅ Waist reduction',
    msg: utils.units(store.get('waistReduction'))
  });
  store.set('backOpening', measurements.underbust * options.backOpening);
  debug({
    type: "info",
    label: '✅ Back opening',
    msg: utils.units(store.get('backOpening'))
  });
  let len = measurements.naturalWaistToUnderbust + measurements.naturalWaistToHip;
  for(let option of ['backRise', 'backDrop', 'frontRise', 'frontDrop', 'hipRise'])
    store.set(option, len * options[option]);
  store.set('length', len);

  /**
    * How much should we take in the corset at waist and bust
    *
    * I assume that the hips are larger than the underbust.
    * Can I be sure? Maybe not, but a larger underbust than hip
    * measurements seems very rare to say the least.
    */
    store.set('width', 0.5 * (
      measurements.hipsCircumference -
      store.get('backOpening')
    ));
    store.set('waistIntake', 0.5 * (
      measurements.hipsCircumference  -
      measurements.naturalWaist +
      store.get('waistReduction')
    ));
    store.set('bustIntake', 0.5 * (
      measurements.hipsCircumference  -
      measurements.underbust
    ));

    // Basic box (CB = Center back, CF = Center front)
    let wid = store.get('width');
    points.underbustCF = new Point(0,0);
    points.hipsCF = new Point(0, len);
    points.hipsCB = new Point(wid, len);
    points.underbustCB = new Point(wid , 0);
    points.topSide = points.underbustCF.shiftFractionTowards(points.underbustCB, 0.5);
    points.bottomSide = points.hipsCF.shiftFractionTowards(points.hipsCB, 0.5);
    points.waistCF = points.underbustCF.shift(-90, measurements.naturalWaistToUnderbust);
    points.waistCB = new Point(points.hipsCB.x, points.waistCF.y);

    // frontRise
    points.topCF = points.underbustCF.shift(90, store.get('frontRise'));
    points.frontRiseStart = points.underbustCF.shift(0, wid * 0.15);
    points.frontRiseStartCp2 = points.underbustCF.shift(0, wid * 0.11);
    points.topCFCp1 = points.topCF.shift(0, wid * 0.11);

    // frontDrop
    points.bottomCF = points.hipsCF.shift(-90, store.get('frontDrop'));
    points.bottomCFCp2 = points.bottomCF.shift(0, wid * 0.11);

    // hipRise
    points.hipRise = points.bottomSide.shift(90, store.get('hipRise'));
    points.hipRiseCp1 = points.hipRise.shift(180, wid * 0.3);
    points.hipRiseCp2 = points.hipRise.shift(0, wid * 0.2);

    // backDrop
    points.backDrop = points.hipsCB.shift(-90, store.get('backDrop'));
    points.backDropCp1 = points.backDrop.shift(180, wid * 0.3);

    // backRise
    points.backRise = points.underbustCB.shift(90, store.get('backRise'));
    points.backRiseCp1 = points.backRise.shift(180, wid * 0.4);
    points.topSideCp1 = points.topSide.shift(0, wid * 0.2);

    // Paths
    paths.help1 = new Path()
      .move(points.underbustCF)
      .line(points.hipsCF)
      .line(points.hipsCB)
      .line(points.underbustCB)
      .close();
    paths.help2 = new Path()
      .move(points.topSide)
      .line(points.bottomSide)
      .line(points.waistCF)
      .line(points.waistCB);
    paths.help1.render = false;
    paths.help2.render = false;

    paths.outline = new Path()
      .move(points.bottomCF)
      .curve(points.bottomCFCp2, points.hipRiseCp1, points.hipRise)
      .curve(points.hipRiseCp2, points.backDropCp1, points.backDrop)
      .line(points.backRise)
      .curve(points.backRiseCp1, points.topSideCp1, points.topSide)
      .line(points.frontRiseStart)
      .curve(points.frontRiseStartCp2, points.topCFCp1, points.topCF)
      .line(points.bottomCF)
      .close();

  return part;
};