#3702 Ambitus not at beginning, engraver in Staff context

[Anonymous]

Originally created by: *anonymous

Originally created by: *anonymous

Originally created by: RalphBug... (code.google.com)@gmail.com

Colin wrote :

I've modified it a bit further, putting the \consists in a \layout context. The effect is the same, in that an ambitus prevents a Staff from beiong considered empty, and this would be Bug 1.
The other effect I've noticed, which certainly seems to be Bug 2, is that declaring a \new Voice, when Ambitus_engraver is consisted in a Voice context, causes the ambitus  to be engraved at that point in musical time, wherever it occurs, and not at the start  of the staff.
If it occurs at a \break, the ambitus gets engraved *both* at the end of the previous staff, i.e. before the break, and also at the start of the new staff. This may be Bug 3, or not: I'm not familiar enough with ambitus to be sure. We basses just have to know I, IV and V anyway.

:::TeX
\version "2.17.95"
\score {
<<
\new Staff {
R1
\break
\new Voice
\relative { a'4 b c d }
}
\new Staff {
c'1
\break
% \new Voice

\relative { a'4 b c d }
}
>>
\layout {
\context {
\Staff
\RemoveEmptyStaves
\override VerticalAxisGroup #'remove-first = ##t
\consists "Ambitus_engraver" % ambitus behaves, but empty staff remains
}

\context {
\Voice
% \consists "Ambitus_engraver" %ambitus and empty staff misbehave
}
}
}

[Google Importer]

Originally posted by: ColinPKC... (code.google.com)@gmail.com

For clarity: this is referring to ambitus being engraved other than at the beginning of a part. The example comes from issue 3701 ( the "it" I modified above) with some more diagnosis.

Labels: -Type-Ugly Type-Defect

[Trevor Daniels]

• Description has changed:

Diff:

--- old
+++ new
@@ -4,67 +4,42 @@

 Colin wrote :

-I've modified it a bit further, putting the \consists in a \layout context. The effect is the same, in that an ambitus prevents a Staff from beiong considered empty, and this would be [Bug 1](#1).
-The other effect I've noticed, which certainly seems to be [Bug 2](#2), is that declaring a \new Voice, when Ambitus\_engraver is consisted in a Voice context, causes the ambitus  to be engraved at that point in musical time, wherever it occurs, and not at the start  of the staff.

- If it occurs at a \break, the ambitus gets engraved \*both\* at the end of the previous staff, i.e. before the break, and also at the start of the new staff. This may be [Bug 3](#3), or not: I'm not familiar enough with ambitus to be sure. We basses just have to know I, IV and V anyway.
+I've modified it a bit further, putting the \consists in a \layout context. The effect is the same, in that an ambitus prevents a Staff from beiong considered empty, and this would be Bug 1.
+The other effect I've noticed, which certainly seems to be Bug 2, is that declaring a \new Voice, when Ambitus\_engraver is consisted in a Voice context, causes the ambitus  to be engraved at that point in musical time, wherever it occurs, and not at the start  of the staff.
+ If it occurs at a \break, the ambitus gets engraved \*both\* at the end of the previous staff, i.e. before the break, and also at the start of the new staff. This may be Bug 3, or not: I'm not familiar enough with ambitus to be sure. We basses just have to know I, IV and V anyway.

-
-
+~~~~
+:::TeX
 \version "2.17.95"
-
-\score \{
-
-<<
-
-\new Staff \{
-
-[r1]
-
+\score {
+<<
+\new Staff {
+R1
 \break
-
 \new Voice
-
-\relative \{ a'4 b c d \}
-
-\}
-
-\new Staff \{
-
+\relative { a'4 b c d }
+}
+\new Staff {
 c'1
-
 \break
-
 % \new Voice

+\relative { a'4 b c d }
+}
+>>
+\layout {
+\context {
+\Staff
+\RemoveEmptyStaves
+\override VerticalAxisGroup #'remove-first = ##t
+\consists "Ambitus_engraver" % ambitus behaves, but empty staff remains
+}

-\relative \{ a'4 b c d \}
+\context {
+\Voice
+% \consists "Ambitus_engraver" %ambitus and empty staff misbehave
+}
+}
+}

-\}
-
-&gt;&gt;
-
-\layout \{
-
-\context \{
-
-\Staff
-
-\RemoveEmptyStaves
-
-\override VerticalAxisGroup \#'remove-first = \#\#t
-
-\consists "Ambitus\_engraver" % ambitus behaves, but empty staff remains
-
-\}
-
-\context \{
-
-\Voice
-
-% \consists "Ambitus\_engraver" %ambitus and empty staff misbehave
-
-\}
-
-\}
-
-\}
+~~~~

• Needs: -->
• Patch: -->

[Trevor Daniels]