From b7b1bc63e74e8c593c9f644db771d1de282dbda3 Mon Sep 17 00:00:00 2001
From: "T.Alderighi" <thomasalderighi@gmail.com>
Date: Fri, 21 Dec 2018 12:55:18 +0100
Subject: [PATCH] vt topology

---
 vcg/simplex/tetrahedron/pos.h | 19 ++++++++++++++++++-
 vcg/space/tetra3.h            |  6 +++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/vcg/simplex/tetrahedron/pos.h b/vcg/simplex/tetrahedron/pos.h
index 496fd2ba..c9ed4629 100644
--- a/vcg/simplex/tetrahedron/pos.h
+++ b/vcg/simplex/tetrahedron/pos.h
@@ -102,13 +102,30 @@ public:
 
 };
 
+template <class TetraType>
+void VTStarVT( typename TetraType::VertexType* vp,
+               std::vector<TetraType *> &tetraVec,
+               std::vector<int> &indexes)
+{
+    tetraVec.clear();
+    indexes.clear();
+    tetraVec.reserve(16);
+    indexes.reserve(16);
+    tetra::VTIterator<TetraType> vti(vp);
+    while(!vti.End())
+    {
+        tetraVec.push_back(vti.Vt());
+        indexes.push_back(vti.Vi());
+        ++vti;
+    }
+}
 template <class TetraType>
 void VVStarVT( typename TetraType::VertexPointer vp, std::vector<typename TetraType::VertexPointer> & starVec)
 {
     typedef typename TetraType::VertexPointer VertexPointer;
 
     starVec.clear();
-
+    starVec.reserve(16);
 	VTIterator<TetraType> vti(vp);
 
     while (!vti.End())
diff --git a/vcg/space/tetra3.h b/vcg/space/tetra3.h
index 06594bd0..cd702b31 100644
--- a/vcg/space/tetra3.h
+++ b/vcg/space/tetra3.h
@@ -331,7 +331,11 @@ class Tetra
 		return oppVerts[indexF];
 	}
 
-	// static int EoppositeE ()
+	 static int EoppositeE (const int & indexE)
+	 {
+		 assert(indexE < 6 && indexE >= 0);
+		 return 5 - indexE;
+	 }
         /** @brief Computes the tetrahedron barycenter
          */
 	template <class TetraType>