freesewing/packages/waralee/src/pantsproto.js

import { CreateCrotchPoints } from './util'

export default function (part) {
  let { options, measurements, Point, Path, points, paths } = part.shorthand()

  let seatDepth = (measurements.crotchDepth - measurements.waistToHips) * (1 + options.waistRaise)
  let circumference = measurements.seat
  let circumference4 = circumference / 4

  points.mWaist = new Point(0, 0)

  CreateCrotchPoints(part)

  points.mLeg = points.mHip.shift(270, measurements.inseam * (1 - options.legShortening))
  points.fLegSide = points.mLeg.shift(180, options.crotchFront * circumference4)
  points.bLegSide = points.mLeg.shift(0, options.crotchBack * circumference4)

  points.fWaistFront = points.fWaistSide.shift(180, circumference4)
  points.fWaistFrontOverlap = points.fWaistFront.shift(180, options.waistOverlap * circumference4)
  points.fHipFront = points.fHipSide.shift(180, circumference4)
  points.fHipFrontOverlap = points.fHipFront.shift(180, options.waistOverlap * circumference4)
  points.fLegFront = points.fLegSide.shift(180, circumference4)
  points.fLegFrontOverlap = points.fLegFront.shift(180, options.waistOverlap * circumference4)

  // Calculate the distance we need to move horizontally to get to the point that will
  // diagonally be the distance we're looking for (circumference/4)
  let bHorDistance = Math.sqrt(
    circumference4 * circumference4 - options.backRaise * seatDepth * options.backRaise * seatDepth
  )
  // Create a point that is this distance from the side.
  points.bWaistBack = points.mWaist
    .shift(90, options.waistBand)
    .shift(0, options.crotchBack * circumference4 + bHorDistance)

  points.bWaistBackOverlap = points.bWaistBack.shift(0, options.waistOverlap * circumference4)

  points.bHipBack = points.bHipSide.shift(0, circumference4)
  points.bHipBackOverlap = points.bHipBack.shift(0, options.waistOverlap * circumference4)
  points.bLegBack = points.bLegSide.shift(0, circumference4)
  points.bLegBackOverlap = points.bLegBack.shift(0, options.waistOverlap * circumference4)

  points.bWaistSideTemp = points.bWaistSide.shift(0, 2) // This is a trick to make the offset() call work. Without it, the offset is crossing the cutout line.
  paths.waistBack = new Path()
    .move(points.bWaistBackOverlap)
    .line(points.bWaistBack)
    .line(points.bWaistSideTemp) // This is a trick to make the offset() call work. Without it, the offset is crossing the cutout line.
    .line(points.bWaistSide)
    .setRender(false)
  paths.waistFront = new Path()
    .move(points.fWaistSide)
    .line(points.fWaistFront)
    .line(points.fWaistFrontOverlap)
    .setRender(false)
  paths.front = new Path()
    .move(points.fWaistFrontOverlap)
    .line(points.fHipFrontOverlap)
    .line(points.fLegFrontOverlap)
    .setRender(false)
  paths.back = new Path()
    .move(points.bLegBackOverlap)
    .line(points.bHipBackOverlap)
    .line(points.bWaistBackOverlap)
    .setRender(false)
  paths.leg = new Path().move(points.fLegFrontOverlap).line(points.bLegBackOverlap).setRender(false)
  paths.cutout = new Path()
    .move(points.bWaistSide)
    .curve(points.bWaistCrotchCP, points.bHipCrotchCP, points.mHip)
    .curve(points.fHipCrotchCP, points.fWaistCrotchCP, points.fWaistSide)
    .setRender(false)

  paths.seam = paths.waistFront
    .join(paths.front)
    .join(paths.leg)
    .join(paths.back)
    .join(paths.waistBack)
    .join(paths.cutout)
    .close()
    .attr('class', 'fabric')
  if (options.frontPocket) {
    points.frontPocketTop = points.fWaistSide
      .shift(
        270,
        options.frontPocketVerticalOffset * (measurements.crotchDepth - measurements.waistToHips) +
          options.waistBand * 2
      )
      .shift(180, options.frontPocketHorizontalOffset * measurements.seat)

    points.frontPocketTop2 = points.frontPocketTop.shift(340, 12)
    points.frontPocketBottom = points.frontPocketTop.shift(
      250,
      options.frontPocketSize * (measurements.crotchDepth - measurements.waistToHips)
    )
    points.frontPocketBottom2 = points.frontPocketBottom.shift(340, 12)

    paths.frontPocket = new Path()
      .move(points.frontPocketTop)
      .line(points.frontPocketBottom)
      .line(points.frontPocketBottom2)
      .line(points.frontPocketTop2)
      .close()
      .attr('class', 'fabric')
  }

  if (options.backPocket) {
    points.backPocketRight = points.bWaistBack
      .shiftTowards(points.bWaistSide, options.backPocketHorizontalOffset * measurements.seat)
      .shift(
        270,
        options.backPocketVerticalOffset * (measurements.crotchDepth - measurements.waistToHips) +
          options.waistBand * 2
      )
    points.backPocketLeft = points.bWaistBack
      .shiftTowards(
        points.bWaistSide,
        options.backPocketHorizontalOffset * measurements.seat +
          options.backPocketSize * (measurements.crotchDepth - measurements.waistToHips)
      )
      .shift(
        270,
        options.backPocketVerticalOffset * (measurements.crotchDepth - measurements.waistToHips) +
          options.waistBand * 2
      )
    points.backPocketRight2 = points.backPocketRight.shift(
      points.backPocketRight.angle(points.backPocketLeft) + 90,
      12
    )
    points.backPocketLeft2 = points.backPocketLeft.shift(
      points.backPocketLeft.angle(points.backPocketRight) - 90,
      12
    )

    paths.backPocket = new Path()
      .move(points.backPocketLeft)
      .line(points.backPocketLeft2)
      .line(points.backPocketRight2)
      .line(points.backPocketRight)
      .close()
      .attr('class', 'fabric')
  }

  part.render = false

  return part
}