Fix wrong index point addition in polygon geometries

qgis · Feb 26, 2025 · 54607d3 · 54607d3
1 parent 3b9eb96
commit 54607d3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/3d/qgsrubberband3d.cpp b/src/3d/qgsrubberband3d.cpp
@@ -315,7 +315,7 @@ void QgsRubberBand3D::addPoint( const QgsPoint &pt )
   if ( QgsPolygon *polygon = qgsgeometry_cast<QgsPolygon *>( mGeometry.constGet() ) )
   {
     QgsLineString *exteriorRing = qgsgeometry_cast<QgsLineString *>( polygon->exteriorRing() );
-    const int lastVertexIndex = exteriorRing->numPoints() - 2;
+    const int lastVertexIndex = exteriorRing->numPoints() - 1;
     exteriorRing->insertVertex( QgsVertexId( 0, 0, lastVertexIndex ), pt );
   }
   else if ( QgsLineString *lineString = qgsgeometry_cast<QgsLineString *>( mGeometry.constGet() ) )