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| author | Georg Zotti <Georg.Zotti@univie.ac.at> | 2023-03-17 12:52:41 +0100 |
|---|---|---|
| committer | Georg Zotti <Georg.Zotti@univie.ac.at> | 2023-03-17 12:52:53 +0100 |
| commit | d89a6e141a5dabb870fce7d988a4935d7709b5bb (patch) | |
| tree | 25ffebfe8bac6d1b4b298cbca90f0c71158ed2e7 | |
| parent | 1842cbcbc7c355e92fce622f6513ca8d1a346927 (diff) | |
SUG: Improve caveat description on horizon polygons
| -rw-r--r-- | guide/ch_landscapes_gz.tex | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/guide/ch_landscapes_gz.tex b/guide/ch_landscapes_gz.tex index 3efd886a5c..49536c4d3e 100644 --- a/guide/ch_landscapes_gz.tex +++ b/guide/ch_landscapes_gz.tex @@ -183,8 +183,13 @@ present there, it will be used to define object visibility (instead of the opacity of the landscape photo textures) and, if
\var{horizon\_line\_color} is defined, will be plotted.
-There are two little caveats:
+There are a few little caveats:
\begin{itemize}
+\item If you create a polygonal line with vertex azimuths 0, 90, 180, 270 (exactly),
+the horizon may not show up at all. Add a tiny nonzero value to the global rotation, like
+\begin{configfile}
+polygonal_angle_rotatez = 0.0000001
+\end{configfile}
\item Sometimes, there may appear vertical lines
from some corners towards the zenith or the mathematical horizon,
e.g.\ if there is a vertex including azimuth 0 or 180. If this
|