From de9e7cc9424bf22aa73adfc07fed10ef2fbebf01 Mon Sep 17 00:00:00 2001
From: Abdullah Tahiri <abdullah.tahiri.yo@gmail.com>
Date: Mon, 9 Jul 2018 14:12:36 +0200
Subject: [PATCH] Part: Improvement to closest parameter determination when the
 projection does not exist in the trimmer curve

---
 src/Mod/Part/App/Geometry.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Mod/Part/App/Geometry.cpp b/src/Mod/Part/App/Geometry.cpp
index 6979faceab..368dfe338e 100644
--- a/src/Mod/Part/App/Geometry.cpp
+++ b/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());