You need "Single Positioning" used in your kerninglookup:

lookup kernHorizontalKerninglookup2 {
pos \f \space' \T ;
} kernHorizontalKerninglookup2;

lookup SinglePositioninglookup3 {
pos \space <0 0 300 0 >;
} SinglePositioninglookup3;

if I understand it correctly...

In Fontlab your code gives:

syntax error at ";"

:S

"FontLab Studio currently does not support:
GSUB lookup type 2 (Multiple substitution, e.g. a b -> c d)
GPOS lookup types 3 (Cursive attachment positioning), 4 (Mark-to-Base attachment positioning), 5 (Mark-to-Ligature attachment
positioning), 6 (Mark-to-Mark attachment positioning), 7
(Contextual positioning), 8 (Chaining contextual positioning)"
Manual, p. 835
So VOLT or FontForge...

OK, understood. Now I am trying to import my FL features into VOLT without success :S
When I import my OT font to VOLT the features are lost. Any idea on how to keep FL features in Volt?

Ramiro,

I think your code should work if you have FontLab Studio 5.1 because it uses a newer version of the Adobe FDK thank FLS 5.0.

Hi Jens,
I tried running in FL 5.1 the following code

feature kern {
lookup one {
position d space' <0 0 3000 0> D ;
} one;
} kern;

and now it does not give error message BUT there is not effect on the addressed glyphs (either in the preview window or generating and testing the font).

my code in ttx syntax:

Hereby I invoque the powers and wisdom of the omnipresent Adam Twardoch!
Please materialize and help us! :)

VOLT does not decompile OTL tables, so the data needs to be either in the plain text formats used to store and transfer VOLT projects, lookups, groups or glyph set data (.vtp, .vtl, .vtg, .vtd) or in the private table binary format in which VOLT projects are stored within a source TTF). FontLab offers an option to 'Export VOLT data' when generating a TTF, which I think means it will try to write the private table, but I don't think it is very reliable. You would probably need to rebuild your features and lookups in VOLT.

Alternatively, you should be able to use the AFDKO v.2 outside of FontLab to compile your feature code. Or you could use DTL OTMaster.

Thanks for the help. I finally was able to run the code in Fontlab 5.1
The preview does not show the results but testing a generated font, the effects can be seen.
Great! Now I can set kerning for difficult triplets :)

Ramiro,

sorry, I was on vacation :)

Adam

No problem Adam, I don't expect the Fontlab genie to materialize every time I invoke it :)