From b9f4b1a4cb6a74425bcf925e4cb3fe8ad26769b0 Mon Sep 17 00:00:00 2001
From: nico <nico.pietroni@gmail.com>
Date: Mon, 8 Jan 2018 15:59:07 +1100
Subject: [PATCH] added GloballyRotate function to rotate the UV
 parametrization

---
 .../algorithms/parametrization/uv_utils.h     | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/vcg/complex/algorithms/parametrization/uv_utils.h b/vcg/complex/algorithms/parametrization/uv_utils.h
index 53a46f8d..b813fa2d 100644
--- a/vcg/complex/algorithms/parametrization/uv_utils.h
+++ b/vcg/complex/algorithms/parametrization/uv_utils.h
@@ -24,7 +24,6 @@
 #ifndef VCG_UV_UTILS
 #define VCG_UV_UTILS
 
-
 namespace vcg {
 namespace tri{
 template <class MeshType>
@@ -112,6 +111,26 @@ public:
         }
     }
 
+    static void GloballyRotate(MeshType &m,ScalarType Angle)
+    {
+        vcg::Box2<ScalarType> BB=PerWedgeUVBox(m);
+        UVCoordType Origin=BB.Center();
+        typename MeshType::FaceIterator fi;
+        for (fi=m.face.begin();fi!=m.face.end();fi++)
+        {
+            if ((*fi).IsD()) continue;
+            for (int i=0;i<3;i++)
+            {
+                (*fi).WT(i).P()-=Origin;
+                ScalarType X1=(*fi).WT(i).P().X()*cos(Angle)-(*fi).WT(i).P().Y()*sin(Angle);
+                ScalarType Y1=(*fi).WT(i).P().X()*cos(Angle)+(*fi).WT(i).P().Y()*sin(Angle);
+                (*fi).WT(i).P().X()=X1;
+                (*fi).WT(i).P().Y()=Y1;
+                (*fi).WT(i).P()+=Origin;
+            }
+        }
+    }
+
     static void LaplacianUVVert(MeshType &m,bool fix_borders=false,int steps=3)
     {
         FaceIterator fi;