Add missing descriptions for titan waistband balance (#7234)

* Add i18n descriptions for Titan angled waistband

Fix code style

* Add docusaurus documentation for waistband option

* Lily i18n doesn't inherit from Titan, so duplicate strings here

designs/lily/i18n/en.json

@@ -75,6 +75,26 @@
     "waistbandWidth": {
       "t": "Waistband width",
       "d": "The width of the waistband"
+    },
+    "waistAngle":  {
+      "t": "Waistband angle",
+      "d": "Change the angle of the waistband when viewed from the side"
+    },
+    "useWaistAngleFor": {
+      "t": "Use waistband angle for",
+      "d": "Apply the waistband angle to the front, back or both"
+    },
+    "useWaistAngleFor.both": {
+      "t": "Both",
+      "d": "Apply the waistband angle to the front and back"
+    },
+    "useWaistAngleFor.backOnly": {
+      "t": "Back",
+      "d": "Apply the waistband angle only to the back"
+    },
+    "useWaistAngleFor.frontOnly": {
+      "t": "Front",
+      "d": "Apply the waistband angle only to the front"
     }
   }
 }

designs/titan/i18n/en.json

@@ -88,6 +88,26 @@
       "t": "Waist ease",
       "d": "Controls the amount of ease at your waist"
     },
+    "waistAngle":  {
+      "t": "Waistband angle",
+      "d": "Change the angle of the waistband when viewed from the side"
+    },
+    "useWaistAngleFor": {
+      "t": "Use waistband angle for",
+      "d": "Apply the waistband angle to the front, back or both"
+    },
+    "useWaistAngleFor.both": {
+      "t": "Both",
+      "d": "Apply the waistband angle to the front and back"
+    },
+     "useWaistAngleFor.backOnly": {
+      "t": "Back",
+      "d": "Apply the waistband angle only to the back"
+    },
+     "useWaistAngleFor.frontOnly": {
+      "t": "Front",
+      "d": "Apply the waistband angle only to the front"
+    },
     "grainlinePosition": {
       "t": "Grainline position",
       "d": "Controls the horizontal position of the leg relative to the seat"

designs/titan/src/back.mjs

@@ -200,7 +200,7 @@ function titanBack({
       // Revert back to the previous rotation.
       for (const i of rotate) {
         points[i] = saved[i]
-  }
+      }
       points.fork = saved.fork
       points.forkCp2 = saved.forkCp2
     }
@@ -238,10 +238,14 @@ function titanBack({
     points.styleWaistIn = points.waistIn.clone()
     points.styleWaistOut = points.waistOut.clone()
   }
+
   // Now angle the waist (if requested)
   // create a backup of the unangled position, for use in dependent patterns
   points.styleWaistInNoAngle = points.styleWaistIn.clone()
-  if (options.waistAngle != 0 && (options.useWaistAngleFor === 'both' || options.useWaistAngleFor === 'backOnly') ) {
+  if (
+    options.waistAngle !== 0 &&
+    (options.useWaistAngleFor === 'both' || options.useWaistAngleFor === 'backOnly')
+  ) {
     // calculate how much to add/subtract
     // assume that from the crossSeamCurveStart upwards, the crotch seam will be vertical
     // base of the triangle is then horizontal distance from crossSeamCurveStart to fork
@@ -249,13 +253,16 @@ function titanBack({
     // use positive value for triangleBase: positive angle means higher back
     triangleBase = points.fork.dx(points.crossSeamCurveStart)
     // length of opposite side is length of adjacent side times tangent of the angle
-    triangleHeight = Math.tan(options.waistAngle * Math.PI/180) * triangleBase
+    triangleHeight = Math.tan((options.waistAngle * Math.PI) / 180) * triangleBase
 
     // top of cross seam is a straight line, so just extend
-    points.styleWaistIn = points.crossSeamCurveStart.shiftOutwards(points.styleWaistIn,triangleHeight)
+    points.styleWaistIn = points.crossSeamCurveStart.shiftOutwards(
+      points.styleWaistIn,
+      triangleHeight
+    )
 
     // report the change in height
-    log.info(['additionalHeightCenterBack',units(triangleHeight)])
+    log.info(['additionalHeightCenterBack', units(triangleHeight)])
   }
   // Adapt the vertical placement of the seat control point to the lowered waist
   points.seatOutCp2.y = points.seatOut.y - points.styleWaistOut.dy(points.seatOut) / 2
@@ -447,13 +454,9 @@ export const back = {
     fitKnee: { bool: false, menu: 'style' },
     waistAngle: { deg: 0, min: -20, max: 20, menu: 'style' },
     useWaistAngleFor: {
-      dflt: "both",
-      list: [
-        "both",
-        "backOnly",
-        "frontOnly",
-      ],
-      menu: 'style'
+      dflt: 'both',
+      list: ['both', 'backOnly', 'frontOnly'],
+      menu: 'style',
     },
 
     // Advanced

sites/orgdocs/docs/designs/titan/options/usewaistanglefor/readme.mdx

@@ -0,0 +1,7 @@
+---
+title: 'Use waistband angle for'
+---
+
+Determines if the Waistband angle setting is applied to the back part, the front part or both.
+
+Note that applying the setting to only one of the parts can create an angle at the sideseam.

sites/orgdocs/docs/designs/titan/options/waistangle/readme.mdx

@@ -0,0 +1,10 @@
+---
+title: 'Waistband angle'
+---
+
+Controls the angle of the waistband when the garment is viewed from the side.
+
+Increasing this option will raise the back of the pants and lower the waistband in the front.
+This is ideal for those with a curvy body who want the waistband to sit below the belly in the front, but above the butt in the back.
+
+If you're setting the waistband angle to a larger value, it's also a good idea to increase the waist height to make sure you've got enough coverage in the front.