Add straight lambda (λ) shape, and corresponded variant selector cv94. Old shape is placed under cv95 (#467).

README.md

@@ -315,6 +315,12 @@ The current available styles for `design`/`upright`/`italic`/`oblique` options a
   * Styles for `7`:
     * `v-seven-noserif`, `cv64`: `7` without serif (default for Sans).
     * `v-seven-serifed`, `cv65`: `7` with initial serif (default for Slab).
+  * Styles for `ß`:
+    * `v-eszet-traditional`, `cv34`: Traditional, Fraktur-like Eszet.
+    * `v-eszet-sulzbacher`, `cv35`: A more modern, beta-like Eszet (default).
+  * Styles for `λ`:
+    * `v-lambda-straight`, `cv94`: More-straight letter `λ` (default).
+    * `v-lambda-curly`, `cv95`: More curly letter `λ`, like Iosevka 2.x.
   * Styles for `~`:
     * `v-tilde-high`, `cv16`: Higher tilde `~`.
     * `v-tilde-low`, `cv17`: Lower tilde `~` (default).
@@ -353,9 +359,6 @@ The current available styles for `design`/`upright`/`italic`/`oblique` options a
   * Styles for `<=`, `>=`:
     * `v-lig-ltgteq-flat`, `cv66`: The lower bar of `<=` and `>=` ligation is flat (default).
     * `v-lig-ltgteq-slanted`, `cv67`: The lower bar of `<=` and `>=` ligation is slanted.
-  * Styles for `ß`:
-    * `v-eszet-traditional`, `cv34`: Traditional, Fraktur-like Eszet.
-    * `v-eszet-sulzbacher`, `cv35`: A more modern, beta-like Eszet (default).
 
 <!-- END Section-Cherry-Picking-Styles -->
 

changes/3.0.0-rc.6.md

@@ -1 +1,2 @@
- * Add IEC power symbol.
+ * Add IEC power symbol.
+ * Add straight lambda (`λ`) shape, and corresponded variant selector `cv94`. Old shape is placed under `cv95` (#467).

glyphs/letters-unified-basic.ptl

@@ -1306,9 +1306,10 @@ glyph-block LetterUnified-Basic : begin
 
 	### y
 	do "y and related ============================================================================"
-		define [GenSmallYShape straightBar] : begin
-			local useStraightBottom : !SLAB && straightBar
-			local useCurlyBottom : SLAB || straightBar
+		define [GenSmallYShape straightBar serifless] : begin
+			local slab : if serifless false SLAB
+			local useStraightBottom : !slab && straightBar
+			local useCurlyBottom : slab || straightBar
 			local px1 0.84
 			local py1 : linreg 18 0.8 126 0.76 STROKE
 			local px2 0.95
@@ -1321,8 +1322,9 @@ glyph-block LetterUnified-Basic : begin
 			local dpy2 : (1 - [linreg (1 - px1) (1 - py1) px2 py2 1]) / (1 - py2)
 			local yrstrokel0 : MIDDLE - WIDTH * 0.1
 			local yrstrokel : MIDDLE - WIDTH * 0.1 + (STROKE * HVCONTRAST * [if (useStraightBottom || useCurlyBottom) (2 / 3) (1 / 3)])
-			local ySbCor : (XH / CAP) * (OX * [if SLAB 1 4])
-			local yrstroker : RIGHTSB - [if straightBar ySbCor 0]
+			local ySbCor : (XH / CAP) * (OX * [if slab 1 4])
+			local sbScalar : if (straightBar && SLAB && !slab) 1.5 1
+			local yrstroker : WIDTH - SB * sbScalar - [if straightBar ySbCor 0]
 			local yshrink : [linreg 18 1 126 0.85 STROKE] * [if straightBar ([adviceBlackness 3.25] / STROKE) 1]
 			local yBottomJut : JUT * 1.25
 			local slabysize : JUT * 1.0625 * (WIDTH / UPM) + STROKE
@@ -1428,7 +1430,7 @@ glyph-block LetterUnified-Basic : begin
 						yJoinKnots ds ds2 top bottom
 					SmallYStrokeSplitMask top bottom false (-1)
 
-				if SLAB : begin
+				if slab : begin
 					include : AIVSerifs top
 
 			define [SmallYHookTopShape top bottom] : glyph-construction
@@ -1457,34 +1459,20 @@ glyph-block LetterUnified-Basic : begin
 						yJoinKnots ds ds2 top bottom true
 					SmallYStrokeSplitMask top bottom true (-1)
 
-				if SLAB : begin
+				if slab : begin
 					include : AIVSerifs top
 					eject-contour 'serifRT'
 
 			define [SmallLambdaShape top bottom] : glyph-construction
-				local ds : (top - bottom) * pds
-				local ds2 : (top - bottom) * pds2
-				local left    yrstrokel0
-				local right : yrstroker - HALFSTROKE * HVCONTRAST
-
-				include : dispiro
-					widths.center
-					flat right bottom [heading UPWARD]
-					curl right (bottom + ds) [heading UPWARD]
-					quadcontrols 0 dpy1 16
-					flat [mix right left (1 - px1)] [mix (top - ds2) (bottom + ds) py1]
-					curl [mix right left px2] [mix (top - ds2) (bottom + ds) (1 - py20)]
-					quadcontrols 1 (1 - dpy20) 16
-					flat left (top - ds2) [heading UPWARD]
-					curl left top [heading UPWARD]
-
-				include : dispiro
-					widths.center
-					flat (WIDTH - right) bottom [heading UPWARD]
-					curl (WIDTH - right) (bottom + ds) [heading UPWARD]
-					quadcontrols 0 dpy1 16
-					flat [mix (WIDTH - left) (WIDTH - right) px1] [mix (top - ds2) (bottom + ds) py1]
-					curl MIDDLE [mix (top - ds2) (bottom + ds) [linreg (1 - px2) (1 - py20) px1 py1 ((MIDDLE - left) / (right - left))]]
+				set currentGlyph.gizmo : Italify (-para.slantAngle)
+				include : SmallYShape top bottom
+				set currentGlyph.gizmo : Italify (+para.slantAngle)
+				# apply-transform : Upright
+				apply-transform : Translate 0 (-[mix bottom top 0.5])
+				apply-transform : Scale 1 (-1)
+				apply-transform : Translate 0 (+[mix bottom top 0.5])
+				# apply-transform : Italify
+				currentGlyph.reverse-all
 
 			return : object SmallYShape SmallYHookTopShape SmallLambdaShape
 
@@ -1553,16 +1541,26 @@ glyph-block LetterUnified-Basic : begin
 		turned 'turny.curly'    nothing 'y.curly' MIDDLE (XH / 2) MarkSet.b
 		select-variant 'turny' 0x28E (follow -- 'yhooktop')
 
-		sketch # lambda
-			include MarkSet.b
-			include : [GenSmallYShape false].SmallLambdaShape CAP 0
-			set-anchor "overlay" BASE MIDDLE (XH / 2)
-			save 'lambda' 0x3BB
+		define [LambdaBarOverlayShape] : FlatSlashShape ([tp [Upright] [query-glyph 'l.serifed'].anchors.above].x / para.diversityI) [mix 0 CAP 0.7] (OVERLAYSTROKE / 2)
 
-		sketch # lambdaslash
-			include [refer-glyph 'lambda'] AS_BASE
-			include : FlatSlashShape ([tp [Upright] [query-glyph 'l.serifed'].anchors.above].x / para.diversityI) [mix 0 CAP 0.7] (OVERLAYSTROKE / 2)
-			save 'lambdaslash' 0x19B
+		sketch # lambda.straight
+			include MarkSet.b
+			include : [GenSmallYShape true  true].SmallLambdaShape CAP 0
+			set-anchor "overlay" BASE MIDDLE (XH / 2)
+			save 'lambda.straight'
+			include : LambdaBarOverlayShape
+			save 'lambdaSlash.straight'
+
+		sketch # lambda.curly
+			include MarkSet.b
+			include : [GenSmallYShape false true].SmallLambdaShape CAP 0
+			set-anchor "overlay" BASE MIDDLE (XH / 2)
+			save 'lambda.curly'
+			include : LambdaBarOverlayShape
+			save 'lambdaSlash.curly'
+
+		select-variant 'lambda' 0x3BB
+		select-variant 'lambdaSlash' 0x19B (follow -- 'lambda')
 
 	### K and k
 	do "k and related ============================================================================"

snapshot/index.html

@@ -436,6 +436,30 @@
 							<span class="sample italic" style="font-feature-settings:'cv65'">7</span>
 				</li>
 			</ol></li>
+			<li><ol class="group">
+				<li>
+					<span class="tag">cv34</span>
+							<span class="sample" style="font-feature-settings:'cv34'">ß</span>
+							<span class="sample italic" style="font-feature-settings:'cv34'">ß</span>
+				</li>
+				<li>
+					<span class="tag">cv35</span>
+							<span class="sample" style="font-feature-settings:'cv35'">ß</span>
+							<span class="sample italic" style="font-feature-settings:'cv35'">ß</span>
+				</li>
+			</ol></li>
+			<li><ol class="group">
+				<li>
+					<span class="tag">cv94</span>
+							<span class="sample" style="font-feature-settings:'cv94'">λ</span>
+							<span class="sample italic" style="font-feature-settings:'cv94'">λ</span>
+				</li>
+				<li>
+					<span class="tag">cv95</span>
+							<span class="sample" style="font-feature-settings:'cv95'">λ</span>
+							<span class="sample italic" style="font-feature-settings:'cv95'">λ</span>
+				</li>
+			</ol></li>
 			<li><ol class="group">
 				<li>
 					<span class="tag">cv16</span>
@@ -593,18 +617,6 @@
 							<span class="sample" style="font-feature-settings:'cv67'">&gt;=</span>
 				</li>
 			</ol></li>
-			<li><ol class="group">
-				<li>
-					<span class="tag">cv34</span>
-							<span class="sample" style="font-feature-settings:'cv34'">ß</span>
-							<span class="sample italic" style="font-feature-settings:'cv34'">ß</span>
-				</li>
-				<li>
-					<span class="tag">cv35</span>
-							<span class="sample" style="font-feature-settings:'cv35'">ß</span>
-							<span class="sample italic" style="font-feature-settings:'cv35'">ß</span>
-				</li>
-			</ol></li>
 	</ol>
 </section>
 <section id="stylesets" class="opentype">

support/glyph.ptl

@@ -89,6 +89,11 @@ export all : class Glyph
 		return this
 	public reverseLast : public reverse-last
 
+	public [reverse-all] : begin
+		if this.contours : set this.contours : this.contours.map : lambda [c] : c.reverse
+		return this
+	public reverseAll : public reverse-all
+
 	public [tag-contour tag n] : begin
 		if this.contours : begin
 			local lastContour this.contours.(this.contours.length - 1)

variants.toml

@@ -339,6 +339,30 @@ description = 'Cursive-like `y`'
 y = "cursive"
 yhooktop = "straight"
 
+[simple.v-eszet-traditional]
+tag = 'cv34'
+sampler = 'ß'
+description = 'Traditional, Fraktur-like Eszet'
+eszet = 'traditional'
+
+[simple.v-eszet-sulzbacher]
+tag = 'cv35'
+sampler = 'ß'
+description = 'A more modern, beta-like Eszet'
+eszet = 'sulzbacher'
+
+[simple.v-lambda-straight]
+tag = "cv94"
+sampler = 'λ'
+description = 'More-straight letter `λ`'
+lambda = "straight"
+
+[simple.v-lambda-curly]
+tag = "cv95"
+sampler = 'λ'
+description = 'More curly letter `λ`, like Iosevka 2.x'
+lambda = "curly"
+
 [simple.v-zero-slashed]
 tag = 'cv13'
 sampler = '0'
@@ -567,18 +591,6 @@ description = 'The lower bar of `<=` and `>=` ligation is slanted'
 "eq.at-lteq.lig2" = "slanted"
 "eq.at-gteq.lig2" = "slanted"
 
-[simple.v-eszet-traditional]
-tag = 'cv34'
-sampler = 'ß'
-description = 'Traditional, Fraktur-like Eszet'
-eszet = 'traditional'
-
-[simple.v-eszet-sulzbacher]
-tag = 'cv35'
-sampler = 'ß'
-description = 'A more modern, beta-like Eszet'
-eszet = 'sulzbacher'
-
 ########## "Untagged" variants, used for Aile, etc.
 
 [simple.v-capital-i-straight]
@@ -641,7 +653,8 @@ design = [
 	'v-capital-y-straight',
 	'v-capital-r-straight',
 	'v-u-with-bar',
-	'v-capital-g-tooth'
+	'v-capital-g-tooth',
+	'v-lambda-straight'
 ]
 upright = [
 	'v-a-doublestorey',
@@ -700,9 +713,9 @@ design = ['v-at-fourfold', 'v-a-singlestorey', 'v-i-zshaped', 'v-l-zshaped', 'v-
 
 [composite.ss08]
 description = 'Pragmata Pro Style'
-design = ['v-at-threefold', 'v-a-doublestorey', 'v-l-serifed', 'v-i-serifed', 'v-asterisk-low', 'v-zero-dotted', 'v-brace-straight', 'v-dollar-open', 'v-underscore-low', 'v-numbersign-slanted', 'v-percent-dots', 'v-v-curly', 'v-turn-v-curly', 'v-w-curly', 'v-x-curly', 'v-capital-y-curly', 'v-capital-r-curly']
-upright = ['v-k-curly', 'v-y-curly', 'v-g-doublestorey']
-italic  = ['v-k-curly', 'v-y-curly', 'v-g-singlestorey']
+design = ['v-at-threefold', 'v-a-doublestorey', 'v-l-serifed', 'v-i-serifed', 'v-asterisk-low', 'v-zero-dotted', 'v-brace-straight', 'v-dollar-open', 'v-underscore-low', 'v-numbersign-slanted', 'v-percent-dots', 'v-v-curly', 'v-turn-v-curly', 'v-w-curly', 'v-x-curly', 'v-capital-y-curly', 'v-capital-r-curly', 'v-k-curly', 'v-y-curly', 'v-lambda-curly']
+upright = ['v-g-doublestorey']
+italic  = ['v-g-singlestorey']
 
 [composite.ss09]
 description = 'Source Code Pro Style'
@@ -732,6 +745,6 @@ design = ['v-i-serifed', 'v-l-italic', 'v-u-without-bar', 'v-zero-dotted', 'v-th
 
 [composite.ss20]
 description = 'Curly Style'
-design = ['v-v-curly', 'v-turn-v-curly', 'v-w-curly', 'v-x-curly', 'v-capital-y-curly', 'v-capital-r-curly']
+design = ['v-v-curly', 'v-turn-v-curly', 'v-w-curly', 'v-x-curly', 'v-capital-y-curly', 'v-capital-r-curly', 'v-lambda-curly']
 upright = ['v-k-curly', 'v-y-curly']
 italic  = ['v-k-cursive', 'v-y-cursive']