Contextual Alternate and Kerning

[haquay]

Hi experts!
1) I m working on my own handwritting font. I want to try to make contextual alternates. For example like
a character by itself
a character in the word "character"
a character in the word " apple"

may be there are 4-5 different a character.

I dont know how to make CALT in Fontlab. Could you please point me a direction. Thank you

I really appreciate.

[Ray Larabie]

Add the alternative glyphs to the Unicode Private Use Area. (E000, E001 etc.) Name them whatever you like as long as it's not an existing glyph name or starts with a number.

Let's say you made a glyph called help

In the OT code, add

feature calt {
  sub h e l p by help;
} calt;

Make sure you have at least one other OT feature or it won't work. If you have a kern feature, that will do.

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