Creating XTRA sources
draft
Uppercase
Straight glyphs
- only XTRA changes
- only x-direction deltas
XTRA min






XTRA max






Round glyphs
- in AmstelvarA2, internal curvature is controlled separately by XTEQ YTEQ parametric axes
- in Italics, xy-direction deltas are allowed for slanted & rotated shapes
XTRA min






XTRA max






Diagonal glyphs
- xy-direction deltas allowed in slanted strokes
- in AmstelvarA2, slanted measurements are aligned to stroke
- in AmstelvarA2 Italic, XOPQ may change slightly (?)
XTRA min






In RobotoDelta, the width and length of traps is different from the default
XTRA max






In RobotoDelta, the width and length of traps is different from the default
Lowercase
Straight glyphs
- AmstelvarA2 Roman: only XTRA changes
- AmstelvarA2 Roman: only x-direction deltas
XTRA min
![](https://gferreira.github.io/xTools4/images/parametric/AmstelvarA2_n_XTLCmin_measurements{: .img-fluid}
XTRA max
Round glyphs
- AmstelvarA2 Roman: only XTRA changes
- AmstelvarA2 Roman: internal curvature is controlled separately by XTEQ YTEQ parametric axes
XTRA min
XTRA max
![](https://gferreira.github.io/xTools4/images/parametric/AmstelvarA2_o_XTLRmax_measurements{: .img-fluid}
Diagonal glyphs
- AmstelvarA2 Roman: xy-direction deltas allowed in slanted strokes
- AmstelvarA2 Roman: slanted measurements are aligned to stroke
- AmstelvarA2 Roman: Only XTRA changes
XTRA min
![](https://gferreira.github.io/xTools4/images/parametric/AmstelvarA2_v_XTLDmin_measurements{: .img-fluid}
XTRA max
…
Figures
Straight glyphs
- AmstelvarA2 Roman: only XTRA changes
- AmstelvarA2 Roman: only x-direction deltas
XTRA min
![](https://gferreira.github.io/xTools4/images/parametric/AmstelvarA2_one_XTFImin_measurements{: .img-fluid}
XTRA max
Round glyphs
- AmstelvarA2 Roman: only XTRA changes
- AmstelvarA2 Roman: internal curvature is controlled separately by XTEQ YTEQ parametric axes
XTRA min
XTRA max
![](https://gferreira.github.io/xTools4/images/parametric/AmstelvarA2_zero_XTFImax_measurements{: .img-fluid}
Etcetera
…