From cb127824b2961ce7c560e16e6085b87238aa72f2 Mon Sep 17 00:00:00 2001
From: ifv <ifv@opencascade.com>
Date: Tue, 23 Jun 2020 13:55:15 +0300
Subject: [PATCH] 0031616: Modeling algorithm - Section between two shells
 returns wire with gaps (720)

---
 src/IntTools/IntTools_TopolTool.cxx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/IntTools/IntTools_TopolTool.cxx b/src/IntTools/IntTools_TopolTool.cxx
index 863e0687fc..a6bf5c1a4a 100644
--- a/src/IntTools/IntTools_TopolTool.cxx
+++ b/src/IntTools/IntTools_TopolTool.cxx
@@ -246,7 +246,22 @@ void IntTools_TopolTool::ComputeSamplePoints()
     }
     if(nbsu < 10) nbsu = 10;
     if(nbsv < 10) nbsv = 10;
+    // Check anisotropy
+    Standard_Real anULen = (usup - uinf) / myS->UResolution(1.);
+    Standard_Real anVLen = (vsup - vinf) / myS->VResolution(1.);
+    Standard_Real aRatio = anULen / anVLen;
+    if (aRatio >= 10.)
+    {
+      nbsu *= 2;
+      nbsu = Min(nbsu, aMaxNbSample);
+    }
+    else if (aRatio <= 0.1)
+    {
+      nbsv *= 2;
+      nbsv = Min(nbsv, aMaxNbSample);
+    }
   }
+  
     break;
   case GeomAbs_SurfaceOfExtrusion: {
     nbsu = 15;