Reports 6, SRW.SET_CUSTOM_SPACING(spacing) - VGS Units

Question

Hello everybody.
I'm using Reports 6.
I've been wondering for a while, how exactly VGS-Units work.
I've used them in Format triggers of text-fields to set custom spacings like this:
function YT_FormatTrigger return boolean is
begin
SRW.SET_CUSTOM_SPACING(80);
/* 80 is in VGS units */
return (TRUE);
end;
From the help, i've found some explanations about vgs units:
SRW.SET_CUSTOM_SPACING(spacing)
Spacing     Is a number that represents the leading in VGS units, which are very small.
(One inch is equivalent to 8192 VGS units)
OK, this number 8192 is true, but if i change the spacing to half, 4096, the output is not half inch.
Also, if i have two different text-field, other has font size 14 and other font size 12. If i put this format trigger ti both of these fields, the text spacing is not the same in both fields.
Does anyone know how these vgs-units exactly work?
I've not found anything about them.
-DBA-

Answer 1

Hello DBA,
My quick test worked fine for me at 4096 and 8192. So perhaps you have something else going on...or a bug in a particular version. Note that the spacing added between lines does not account for the font box spacing built into the font definition to provide space for accents, descenders, sub and superscripts, etc. So if you're measuring from the bottom of a capitalized character to the top of the capitalized character in the next line, you'll see some extra space added for the font boxes.
regards,
Stewart