From ebd77034ad5419c2ee5b134f7c345c533b06bc96 Mon Sep 17 00:00:00 2001
From: "T.Alderighi" <thomasalderighi@gmail.com>
Date: Tue, 11 Feb 2020 16:41:11 +0100
Subject: [PATCH 1/2] added rudimental (optional) offsetting in
 splitmanifoldcomponents

---
 vcg/complex/algorithms/clean.h | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/vcg/complex/algorithms/clean.h b/vcg/complex/algorithms/clean.h
index b248dfb3..eb77faf8 100644
--- a/vcg/complex/algorithms/clean.h
+++ b/vcg/complex/algorithms/clean.h
@@ -674,7 +674,7 @@ public:
 	}
 
 	/// \brief This function expand current selection to cover the whole connected component.
-	static size_t SplitManifoldComponents(MeshType &m)
+	static size_t SplitManifoldComponents(MeshType &m, const ScalarType moveThreshold = 0)
 	{
 		typedef typename MeshType::FacePointer FacePointer;
 		typedef typename MeshType::FaceIterator FaceIterator;
@@ -720,6 +720,30 @@ public:
 				++selCnt;
 			}
 
+		vcg::tri::UpdateTopology<MeshType>::VertexFace(tmpMesh);
+		vcg::tri::UpdateFlags<MeshType>::VertexBorderFromNone(tmpMesh);
+		for (size_t i = 0; i < size_t(tmpMesh.VN()); ++i)
+		{
+			VertexType & v = tmpMesh.vert[i];
+
+			if (v.IsB())
+			{
+				std::vector<FacePointer> faceVec;
+				std::vector<int> idxVec;
+
+				vcg::face::VFStarVF(&v, faceVec, idxVec);
+
+				CoordType delta(0, 0, 0);
+				for (auto fp : faceVec)
+				{
+					delta += vcg::Barycenter(*fp) - v.cP();
+				}
+				delta /= faceVec.size();
+
+				v.P() += delta * moveThreshold;
+			}
+		}
+
 		UpdateSelection<MeshType>::Clear(tmpMesh);
 		Append<MeshType, MeshType>::MeshCopy(m, tmpMesh);
 		return selCnt;

From ae5e873c2ac7bbb797f9e53bd85d1569389e528c Mon Sep 17 00:00:00 2001
From: Luigi Malomo <malomo.luigi@gmail.com>
Date: Tue, 11 Feb 2020 17:15:00 +0100
Subject: [PATCH 2/2] minor fixes

---
 vcg/simplex/face/topology.h     | 2 +-
 wrap/igl/arap_parametrization.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/vcg/simplex/face/topology.h b/vcg/simplex/face/topology.h
index 82d3f485..004067c8 100644
--- a/vcg/simplex/face/topology.h
+++ b/vcg/simplex/face/topology.h
@@ -889,7 +889,7 @@ void VFDetach(FaceType & f, int z)
 
 /// Append a face in VF list of vertex f->V(z)
 template <class FaceType>
-void VFAppend(FaceType* & f, int z)
+void VFAppend(FaceType * f, int z)
 {
     typename FaceType::VertexType *v = f->V(z);
     if (v->VFp()!=0)
diff --git a/wrap/igl/arap_parametrization.h b/wrap/igl/arap_parametrization.h
index e1952704..0a472c85 100644
--- a/wrap/igl/arap_parametrization.h
+++ b/wrap/igl/arap_parametrization.h
@@ -35,6 +35,7 @@
  * Example of usage:
  *    MeshType m;
  *    ...
+ *    vcg::tri::UpdateBounding<MeshType>::Box(m);
  *    vcg::tri::UpdateFlags<MeshType>::Clear(m);
  *    vcg::tri::UpdateFlags<MeshType>::VertexBorderFromNone(m);
  *    vcg::tri::OptimizeUV_ARAP(m);