Re: Proper Understanding of Y-extent sought

[Trevor Daniels]

Frank Steinmetzger wrote Sunday, April 15, 2012 2:14 PM

> So instead of hoping to find a snippet on the interwebs for each single 
> case
> and playing with the numbers without knowing why they behave as they do, I
> would like to understand what they actually mean.  All the IR says about
> Y-extent is "hardcoded extent in Y direction".
>
> So what exactly do those two numbers denote?
> Is it minimum/maximum?  Extent below/above baseline?  Offset/size?

See
http://www.lilypond.org/doc/v2.14/Documentation/notation/aligning-objects

or the same section in the docs for 2.15.  This gets you started.  The next
question is, "What is the reference point?", to which there is no universal
answer which applies to all grobs.  Trial and error seems to be the best
approach.  Sorry.

Trevor