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Cleanup of AdviceStroke impl

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be5invis 2024-11-10 20:37:24 -08:00
parent e7d3db137c
commit ded9331f9c
1 changed files with 15 additions and 11 deletions
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26
packages/font-glyphs/src/meta/aesthetics.ptl
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@ -76,20 +76,24 @@ export : define [calculateMetrics para] : begin
define SmallArchDepth para.smallArchDepth
# Weight Control
# We will estimate blackness using lower-case 'e'
# We will estimate darkness using lower-case 'e'
define DarknessMockWidth : if (Width < HalfUPM) (HalfUPM * [Math.sqrt : Width / HalfUPM]) Width
define DarknessMockWidth2 : HalfUPM * [Math.sqrt : Width / HalfUPM]
define [BaseFillRate con] : 1 / 2 + para.stroke / ([Math.max HalfUPM DarknessMockWidth2] - SB * 2)
define [InverseCrowdedness con cow] : [Math.tanh (cow * [Math.sqrt con])] / (cow * [Math.sqrt con])
define [advicestrokeImpl con cow div mul] : begin
local gap : DarknessMockWidth * [fallback div 1] - SB * 2
local shrink : [BaseFillRate con] * [InverseCrowdedness con cow]
return : Math.min para.stroke ([fallback mul 1] * gap * shrink)
define [AdviceStroke cow div mul] : advicestrokeImpl HVContrast cow div mul
define [AdviceStroke2 cowX cowY refH div] : Math.min
advicestrokeImpl HVContrast cowX div
advicestrokeImpl 1 cowY (refH / DarknessMockWidth2)
define [StrokeWeightControlSigmoid x] : Math.tanh x
define [AdviceStrokeInSpace availSpace contrast crowdedness mul] : begin
local adjCrowdedness : crowdedness * [Math.sqrt contrast]
local fillRateScalar : [StrokeWeightControlSigmoid adjCrowdedness] / adjCrowdedness
return : Math.min para.stroke (mul * fillRateScalar * [BaseFillRate contrast] * availSpace)
define [AdviceStroke crowdedness div mul] : begin
local spaceH : DarknessMockWidth * [fallback div 1] - SB * 2
AdviceStrokeInSpace spaceH HVContrast crowdedness [fallback mul 1]
define [AdviceStroke2 cowX cowY refH div] : begin
local spaceH : DarknessMockWidth * [fallback div 1] - SB * 2
local spaceV : refH - SB * 2
return : Math.min
AdviceStrokeInSpace spaceH HVContrast cowX 1
AdviceStrokeInSpace spaceV 1 cowY 1
define Stroke : AdviceStroke 2
define DotSize : fallback para.dotSize Stroke