SLA gizmo keeps track of current status of the points, enables the user to erase all points

src/libslic3r/SLA/SLACommon.hpp

@@ -15,6 +15,14 @@ class TriangleMesh;
 
 namespace sla {
     
+// An enum to keep track of where the current points on the ModelObject came from.
+enum class PointsStatus {
+    None,           // No points were generated so far.
+    Generating,     // The autogeneration algorithm triggered, but not yet finished.
+    AutoGenerated,  // Points were autogenerated (i.e. copied from the backend).
+    UserModified    // User has done some edits.
+};
+
 struct SupportPoint {
     Vec3f pos;
     float head_front_radius;