From 6d217a3d1431d5c724e0b8bc4aed382a74f7d4ce Mon Sep 17 00:00:00 2001
From: Fedr <fchelnokov@adalisk.com>
Date: Fri, 21 Oct 2022 14:18:27 +0300
Subject: [PATCH] fromSceneObjFile: show errors if a face has less or more than
 3 vertices

---
 source/MRMesh/MRMeshLoadObj.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/source/MRMesh/MRMeshLoadObj.cpp b/source/MRMesh/MRMeshLoadObj.cpp
index dbe7f618d70e..564096f8b3aa 100644
--- a/source/MRMesh/MRMeshLoadObj.cpp
+++ b/source/MRMesh/MRMeshLoadObj.cpp
@@ -100,7 +100,15 @@ tl::expected<std::vector<NamedMesh>, std::string> fromSceneObjFile( std::istream
             int a = readVert();
             int b = readVert();
             int c = readVert();
+            if ( !in )
+                return tl::make_unexpected( std::string( "Face with less than 3 vertices in OBJ-file" ) );
             t.push_back( { VertId( a-1 ), VertId( b-1 ), VertId( c-1 ) } );
+
+            readVert();
+            if ( !in.fail() )
+                return tl::make_unexpected( std::string( "Face with more than 3 vertices in OBJ-file" ) );
+            if ( !in.bad() && !in.eof() )
+                in.clear();
         }
         else if ( ch == 'o' )
         {