From 784bf6d4b9f1d551eeb92fef7a2e6f7c2cbdf269 Mon Sep 17 00:00:00 2001
From: ikochetkova <irina.kochetkova@opencascade.com>
Date: Tue, 22 Apr 2025 18:01:06 +0100
Subject: [PATCH] Data Exchange, IGES Export - Missing Model Curves in transfer
 cache #483

Check if the curve was already created and use it. Works for shared edges cases.
---
 src/BRepToIGESBRep/BRepToIGESBRep_Entity.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/BRepToIGESBRep/BRepToIGESBRep_Entity.cxx b/src/BRepToIGESBRep/BRepToIGESBRep_Entity.cxx
index 586f67291f..266abaf2fb 100644
--- a/src/BRepToIGESBRep/BRepToIGESBRep_Entity.cxx
+++ b/src/BRepToIGESBRep/BRepToIGESBRep_Entity.cxx
@@ -317,6 +317,13 @@ Handle(IGESData_IGESEntity) BRepToIGESBRep_Entity::TransferShape(
 
 Handle(IGESData_IGESEntity) BRepToIGESBRep_Entity::TransferEdge(const TopoDS_Edge& myedge)
 {
+  Standard_Integer anInd = IndexEdge(myedge);
+  if (anInd != 0)
+  {
+    Handle(IGESData_IGESEntity) ICurve3d = Handle(IGESData_IGESEntity)::DownCast(myCurves(anInd));
+    if (!ICurve3d.IsNull())
+      return ICurve3d;
+  }
   BRepToIGES_BRWire BR(*this);
   BR.SetModel(GetModel());
   TopTools_DataMapOfShapeShape anEmptyMap;