Part: Improvement to closest parameter determination when the projection does not exist in the trimmer curve

src/Mod/Part/App/Geometry.cpp

@@ -454,6 +454,16 @@ bool GeomCurve::closestParameter(const Base::Vector3d& point, double &u) const
             return true;
         }
     }
+    catch (StdFail_NotDone e) { // projection does not exist on trimmer curve, let's try basis curve
+        closestParameterToBasicCurve(point,u);
+
+        if(abs(u-c->FirstParameter()) < abs(u-c->LastParameter()))
+            u = c->FirstParameter();
+        else
+            u = c->LastParameter();
+
+        return true;
+    }
     catch (Standard_Failure& e) {
 
         throw Base::RuntimeError(e.GetMessageString());