Ignore points indicated by classbit, do not toss them. Add (#3055)

documentation.
PDAL · May 26, 2020 · 6a82968 · 6a82968
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diff --git a/doc/stages/filters.smrf.rst b/doc/stages/filters.smrf.rst
@@ -59,6 +59,10 @@ Options
 cell
   Cell size. [Default: 1.0]
 
+classbits
+  Selectively ignore points marked as "synthetic", "keypoint", or "withheld".
+  [Default: empty string, use all points]
+
 cut
   Cut net size (``cut=0`` skips the net cutting step). [Default: 0.0]
 

diff --git a/filters/SMRFilter.cpp b/filters/SMRFilter.cpp
@@ -279,6 +279,7 @@ PointViewSet SMRFilter::run(PointViewPtr view)
     PointViewPtr outView = view->makeNew();
     // ignoredView is appended to the output untouched.
     outView->append(*ignoredView);
+    outView->append(*syntheticView);
     // inlierView is appended to the output, the only PointView whose
     // classifications may have been altered.
     outView->append(*inlierView);