Large Type Piece U+1CE3B is wrong

[PhMajerus]

• Your font version: 28.1.0; ttfautohint (v1.8.4) from PkgTTC-Iosevka-28.1.0.zip
• Your font variant: Regular
• Your operating system (name and version): Win11 Pro x64 en-us
• Your application using Iosevka: Windows Terminal

Good job on including the Large Type Pieces, I've been experimenting with them as well and read through Unicode and original HP 2640 Series reference manual.

I noticed one of the piece is wrong, U+1CE3B is supposed to be the upper left diagonal piece:


(From Unicode's 21235r-terminals-supplement.pdf)

It is mirrored and top-aligned in your font.
You can easily create that character from your correct upper left and lower left U+1CE38, as it contains both the upper left (U+1CE3B) and lower left (U+1CE22) diagonals combined.

Here's the original HP 2640 Series reference chart using your font:

Every other piece seems correct, only occurrences of U+1CE3B are breaking the large characters.

For comparison, you can see the same chart using my glyphs here: microsoft/cascadia-code#709

[be5invis]

@PhMajerus What's the program you used to demonstrate?

[be5invis]

@Logo121 FYI

[PhMajerus]

@be5invis
It's just a text file displayed in Windows Terminal using cat.
I plan to post it in some repository later, and still need to review it a bit, but if you want it to test your font, here the current copy of my documentation file:
Edit: Removed embedded HowTo Large Type Pieces.txt file, now available using curl https://raw.githubusercontent.com/PhMajerus/Documents/main/HowTos/HowTo%20Large%20Type%20Pieces.txt.

It describes all the history and how to use the large type pieces.

I also have a FIGlet font to easily generate large text using the large type pieces almost ready.
Edit: My FIGfont phm-largetype is now available in my FIGfonts collection