[SCM] PostGIS branch master updated. 3.5.0-259-g4c6e1317d

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- Log -----------------------------------------------------------------
commit 4c6e1317d994d54b6584e45169f3ecdf3a6cd44c
Author: Paul Ramsey <pramsey at cleverelephant.ca>
Date:   Thu Apr 10 08:41:22 2025 -0700

    Add note on corner case to CG_StraightSkeleton, closes #5867

diff --git a/doc/reference_sfcgal.xml b/doc/reference_sfcgal.xml
index 225963886..375344fe6 100644
--- a/doc/reference_sfcgal.xml
+++ b/doc/reference_sfcgal.xml
@@ -2558,9 +2558,21 @@ ST_GeomFromText('POLYHEDRALSURFACE Z( ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),
         </refsection>
 
         <refsection><title>Examples</title>
+
             <programlisting>SELECT CG_StraightSkeleton(ST_GeomFromText('POLYGON (( 190 190, 10 190, 10 10, 190 10, 190 20, 160 30, 60 30, 60 130, 190 140, 190 190 ))'));</programlisting>
-            <programlisting>ST_AsText(CG_StraightSkeleton('POLYGON((0 0,1 0,1 1,0 1,0 0))', true);</programlisting>
-            <screen>MULTILINESTRING M ((0 0 0,0.5 0.5 0.5),(1 0 0,0.5 0.5 0.5),(1 1 0,0.5 0.5 0.5),(0 1 0,0.5 0.5 0.5))</screen>
+
+            <programlisting>SELECT ST_AsText(CG_StraightSkeleton('POLYGON((0 0,1 0,1 1,0 1,0 0))', true);
+
+MULTILINESTRING M ((0 0 0,0.5 0.5 0.5),(1 0 0,0.5 0.5 0.5),(1 1 0,0.5 0.5 0.5),(0 1 0,0.5 0.5 0.5))</programlisting>
+
+            <para>Note that valid inputs with rings that touch at a single point will raise an error.</para>
+                <programlisting>SELECT CG_StraightSkeleton(
+'POLYGON((0 0, 3 0, 3 3, 0 3, 0 0), (0 0, 1 2, 2 1, 0 0))'));
+
+NOTICE:  During straight_skeleton(A) :
+NOTICE:    with A: POLYGON((0/1 0/1,3/1 0/1,3/1 3/1,0/1 3/1,0/1 0/1),(0/1 0/1,1/1 2/1,2/1 1/1,0/1 0/1))
+ERROR:  straight skeleton of Polygon with point touching rings is not implemented.
+</programlisting>
 
             <informaltable>
                 <tgroup cols="2">

-----------------------------------------------------------------------

Summary of changes:
 doc/reference_sfcgal.xml | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)


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