* Fix broken geometry of Single-arch Latin Capital Letter Turned M (U+019C) (#1083).

* Fix broken geometry of Single-arch Mathematical Bold Small M (`U+1D426`) (#1084).

changes/7.0.1.md

@@ -1,5 +1,7 @@
  * Add cursive for Latin Small Letter W with Hook (`U+2C73`) (#1081).
  * Fix missing variants of Latin Small Letter Turned M with Long Leg (`U+0270`) (#1082).
+ * Fix broken geometry of Single-arch Latin Capital Letter Turned M (`U+019C`) (#1083).
+ * Fix broken geometry of Single-arch Mathematical Bold Small M (`U+1D426`) (#1084).
  * Fix missing serif and `cv39` variants of Latin Small Letter Feng Digraph (`U+02A9`) (#1085).
  * Fix missing variant of Latin Small Letter Ue (`U+1D6B`) (#1086).
  * Fix missing serif of Italic Latin Phi (#1087).

font-src/glyphs/auto-build/transformed.ptl

@@ -481,7 +481,8 @@ glyph-block Autobuild-Transformed-Mathematical : begin
 	define [createMathDerivedSeriesImpl groupName tfm _records] : begin
 		local { records relSets targetNameMap } : extendRelatedGlyphs groupName _records
 		local pendingGlyphs : records.map : [record] => record.1
-		local forked : Fork pendingGlyphs [para.reinit tfm]
+		local forkedPara : para.reinit tfm
+		local forked : Fork pendingGlyphs forkedPara
 		foreach {unicode glyphid} [items-of records] : if [not : query-glyph targetNameMap.(glyphid)]
 			create-glyph targetNameMap.(glyphid) unicode : glyph-proc
 				if [not : forked.queryByName glyphid] : console.log glyphid

font-src/glyphs/letter/latin/lower-m.ptl

@@ -172,14 +172,14 @@ glyph-block Letter-Latin-Lower-M : begin
 				fine      -- (df.mvs * CThin)
 
 	define [EarlessSingleArchSmallMShape top lbot mbot rbot df] : glyph-proc
-		include : tagged 'barL' : VBarLeft df.leftSB lbot (XH - DToothlessRise) df.mvs
+		include : tagged 'barL' : VBarLeft df.leftSB lbot (top - DToothlessRise) df.mvs
-		include : tagged 'barM' : VBar df.middle mbot XH df.mvs
+		include : tagged 'barM' : VBar df.middle mbot top df.mvs
 		include : dispiro
 			widths.rhs df.mvs
-			g4 df.leftSB (XH - DToothlessRise)
+			g4 df.leftSB (top - DToothlessRise)
-			g4 (df.middle - CorrectionOMidS) (XH - O)
+			g4 (df.middle - CorrectionOMidS) (top - O)
 			archv
-			flat df.rightSB [Math.max (XH - [SmallMSmooth df]) (rbot + 0.1)]
+			flat df.rightSB [Math.max (top - [SmallMSmooth df]) (rbot + 0.1)]
 			curl df.rightSB rbot [heading Downward]
 
 	define SmallMConfig : object
@@ -217,7 +217,7 @@ glyph-block Letter-Latin-Lower-M : begin
 			include : df.markSet.e
 			include : Body XH 0 [if shortLeg [SmallMShortLegHeight df] 0] [if tailed ([SmallMSmoothHeight df] + O) 0] df
 			if tailed : include : RightwardTailedBar df.rightSB 0 [SmallMSmoothHeight df] (sw -- df.mvs)
-			include : Serifs df XH 0 [SmallMSmoothHeight df] 0 tailed earless
+			include : Serifs df XH 0 [if shortLeg [SmallMShortLegHeight df] 0] 0 tailed earless
 
 		create-glyph "capitalSmallM.\(suffix)" : glyph-proc
 			local df : dfM
@@ -225,7 +225,7 @@ glyph-block Letter-Latin-Lower-M : begin
 			include : df.markSet.capital
 			include : Body CAP 0 [if shortLeg [SmallMShortLegHeight df] 0] [if tailed ([SmallMSmoothHeight df] + O) 0] df
 			if tailed : include : RightwardTailedBar df.rightSB 0 [SmallMSmoothHeight df] (sw -- df.mvs)
-			include : Serifs df CAP 0 [SmallMSmoothHeight df] 0 tailed earless
+			include : Serifs df CAP 0 [if shortLeg [SmallMShortLegHeight df] 0] 0 tailed earless
 
 		create-glyph "mLTail.\(suffix)" : glyph-proc
 			local df : dfM

font-src/index.js

@@ -40,10 +40,10 @@ async function getParameters() {
 	const rawVariantsData = await tryParseToml(VARIANTS_TOML);
 	const rawLigationData = await tryParseToml(LIGATIONS_TOML);
 
-	function reinit(argv) {
+	function createParaImpl(argv) {
-		let para = Parameters.init(parametersData, argv);
+		let para = Parameters.init(deepClone(parametersData), argv);
-		VariantData.apply(rawVariantsData, para, argv);
+		VariantData.apply(deepClone(rawVariantsData), para, argv);
-		ApplyLigationData(rawLigationData, para, argv);
+		ApplyLigationData(deepClone(rawLigationData), para, argv);
 
 		if (argv.excludedCharRanges) para.excludedCharRanges = argv.excludedCharRanges;
 		if (argv.compatibilityLigatures) para.compLig = argv.compatibilityLigatures;
@@ -57,9 +57,13 @@ async function getParameters() {
 			width: argv.menu.width - 0,
 			slope: argv.menu.slope
 		};
+		return para;
+	}
 
+	function reinit(argv) {
+		const para = createParaImpl(argv);
 		para.reinit = function (tf) {
-			const argv1 = JSON.parse(JSON.stringify(argv));
+			const argv1 = deepClone(argv);
 			tf(argv1, argv);
 			return reinit(argv1);
 		};
@@ -78,6 +82,10 @@ async function tryParseToml(str) {
 	}
 }
 
+function deepClone(pod) {
+	return JSON.parse(JSON.stringify(pod));
+}
+
 // Save TTF
 async function saveTTF(argv, font) {
 	const sfnt = FontIo.writeFont(font, {

params/parameters.toml

@@ -37,6 +37,8 @@ overshoot = -8          # Vertical overshoot for arcs.
 overshootx = -8         # Horizontal overshoot for arcs.
 oxhook = -2             # Horizontal overshoot for hook tips.
 
+refJut = 85
+
 shoulderfineMin = 0.8
 
 isItalic = false   # Use italic shapes?

params/shape-weight.toml

@@ -11,7 +11,6 @@ dotsize = 125      # Size of dots
 periodsize = 140   # Size of period
 
 jut = 85           # Length of slab serif
-refJut = 85        # Reference JUT, used in `m`
 vjut = 145         # Length of vertical slab serif
 longjut = 175      # Length of long serifs, like that in `i`.