Re: Issue 1735 in lilypond: modifying default behaviour of tremolo slashes

[lilypond]

Updates:
        Labels: -Type-Defect Type-Enhancement

Comment #12 on issue 1735 by address@hidden: modifying default  
behaviour of tremolo slashes
http://code.google.com/p/lilypond/issues/detail?id=1735

2011/7/24 pkx166h:
> Is this jus a new-look or 'slightly altered' tremelo patch?

Umm, i don't understand...

> http://lilypond.org/doc/v2.14/Documentation/notation/short-repeats#index-tremolo-1

> What else needs to be documented. If you can describe what is 'new' in  
> this
> patch for a user I can formulate some notes in the document. If this is  
> just
> a case of a new 'setting' by using an override or tweak then we can add it
> as a snippet. I'm not clear what is really different about this other than
> slope angles. Apologies for my ignorance

There's nothing to apology for!
The current version of the patch doesn't change anything in default  
LilyPond behaviour.  It will add an option, so that users will have more  
choices.  As far as i know, internals won't (and can't) have detailed  
enough description, so it should be mentioned in the docs - where exactly  
is up to you.
So, let me describe how tremolo looks will be controlled *after* applying  
my patch:
There'll be two basic "knobs" for controlling slashes' behaviour:
- slope (this specifies tangent of the slashes),
- shape (this determines whether slashes are rotated rectangles or  
parallelograms).
These two "knobs" are not enough because we want to choose different values  
for each property depending on the situation.  For example in the default  
behaviour some slashes should be rectangular, while other ones should be  
parallelograms.  That's why the 'style' property is used: it's kind of a  
shortcut pointing to a function which calculates what slope and shape  
should be used, depending on situation.  Currently there are two built-in  
styles: 'default' and 'constant' (and this patch is all about  
adding "constant" style).  Their behaviour is demonstrated in the attached  
file.
I hope this is clear.
thanks,
Janek

Attachments:
        tremolo.ly  406 bytes
        tremolo.pdf  40.2 KB