From 236f14553c33eb319e01aa4ddb1bfc1d59cf2ef5 Mon Sep 17 00:00:00 2001
From: Christopher Lackner <clackner@cerbsim.com>
Date: Mon, 3 Jun 2024 17:19:41 +0200
Subject: [PATCH] fix project on edge in MapSurfacemesh if no trafo is given

---
 libsrc/meshing/basegeom.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/libsrc/meshing/basegeom.cpp b/libsrc/meshing/basegeom.cpp
index 119986ec..379185ff 100644
--- a/libsrc/meshing/basegeom.cpp
+++ b/libsrc/meshing/basegeom.cpp
@@ -1072,7 +1072,19 @@ namespace netgen
               if(trafo)
                 p = (*trafo)(p);
               else
-                dst.Project(p);
+                for(auto& edge: dst.edges)
+                  if (edge->primary->nr == seg.edgenr-1)
+                    {
+                      if (mesh[pi].Type() == FIXEDPOINT) {
+                        if((edge->GetStartVertex().GetPoint() - p).Length2() >\
+                           (edge->GetEndVertex().GetPoint() - p).Length2())
+                          p = edge->GetEndVertex().GetPoint();
+                        else
+                          p = edge->GetStartVertex().GetPoint();
+                      }
+                      else
+                        edge->ProjectPoint(p, nullptr);
+                    }
               tree.Insert(p, pi);
               is_point_in_tree[pi] = true;
             }