From 3601161d8012b185c6b69d2fd8712e99b855a047 Mon Sep 17 00:00:00 2001
From: Louis Gombert <louisgombert@gmail.com>
Date: Sun, 21 Dec 2025 23:06:14 +0100
Subject: [PATCH] Part: clean mesh before adding triangulation in
 setupCoinGeometry

Calling BRepMesh_IncrementalMesh repeatedly would accumulate BRep_CurveRepresentation instances attached to the BRep_TEdges of the shape. We now clean added triangulations before adding a new one, which improves performance in the long run.

Co-authored-by: Kacper Donat <kadet1090@gmail.com>
---
 src/Mod/Part/Gui/ViewProviderExt.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Mod/Part/Gui/ViewProviderExt.cpp b/src/Mod/Part/Gui/ViewProviderExt.cpp
index af69992726..b73f592a41 100644
--- a/src/Mod/Part/Gui/ViewProviderExt.cpp
+++ b/src/Mod/Part/Gui/ViewProviderExt.cpp
@@ -24,6 +24,7 @@
 
 #include <Bnd_Box.hxx>
 #include <BRep_Tool.hxx>
+#include <BRepTools.hxx>
 #include <BRepBndLib.hxx>
 #include <BRepBuilderAPI_MakeVertex.hxx>
 #include <BRepExtrema_DistShapeShape.hxx>
@@ -1095,6 +1096,13 @@ void ViewProviderPartExt::setupCoinGeometry(
     meshParams.InParallel = Standard_True;
     meshParams.AllowQualityDecrease = Standard_True;
 
+    // Clear triangulation and PCurves from geometry which can slow down the process
+#if OCC_VERSION_HEX < 0x070600
+    BRepTools::Clean(shape);
+#else
+    BRepTools::Clean(shape, Standard_True);
+#endif
+
     BRepMesh_IncrementalMesh(shape, meshParams);
 
     // We must reset the location here because the transformation data