From 5778f7c42a66027e7dd2f0b967babb9e9b1111c0 Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Sat, 1 Apr 2017 16:50:54 +0300
Subject: [PATCH] Initialize parameter of SketchPlugin_Arc on execute() to
 avoid its reverting

---
 src/SketchPlugin/SketchPlugin_Arc.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/SketchPlugin/SketchPlugin_Arc.cpp b/src/SketchPlugin/SketchPlugin_Arc.cpp
index 0dac256a8..ca7579d86 100644
--- a/src/SketchPlugin/SketchPlugin_Arc.cpp
+++ b/src/SketchPlugin/SketchPlugin_Arc.cpp
@@ -103,6 +103,12 @@ void SketchPlugin_Arc::execute()
       GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, anEnd, aStart, aNormal)
     : GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aStart, anEnd, aNormal);
 
+  if (myParamBefore == 0) { // parameter has not been calculate yet
+    std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(
+        new GeomAPI_Circ2d(aCenterAttr->pnt(), aStartAttr->pnt()));
+    aCircleForArc->parameter(anEndAttr->pnt(), paramTolerance, myParamBefore);
+  }
+
   std::shared_ptr<ModelAPI_ResultConstruction> aResult = document()->createConstruction(data(), 1);
   aResult->setShape(anArcShape);
   aResult->setIsInHistory(false);
-- 
2.39.2