Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/per_vertex_normals.h

@@ -0,0 +1,80 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#ifndef IGL_PER_VERTEX_NORMALS_H
+#define IGL_PER_VERTEX_NORMALS_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+// Note: It would be nice to support more or all of the methods here:
+// "A comparison of algorithms for vertex normal computation"
+namespace igl
+{
+  enum PerVertexNormalsWeightingType
+  {
+    // Incident face normals have uniform influence on vertex normal
+    PER_VERTEX_NORMALS_WEIGHTING_TYPE_UNIFORM = 0,
+    // Incident face normals are averaged weighted by area
+    PER_VERTEX_NORMALS_WEIGHTING_TYPE_AREA = 1,
+    // Incident face normals are averaged weighted by incident angle of vertex
+    PER_VERTEX_NORMALS_WEIGHTING_TYPE_ANGLE = 2,
+    // Area weights
+    PER_VERTEX_NORMALS_WEIGHTING_TYPE_DEFAULT = 3,
+    NUM_PER_VERTEX_NORMALS_WEIGHTING_TYPE = 4
+  };
+  // Compute vertex normals via vertex position list, face list
+  // Inputs:
+  //   V  #V by 3 eigen Matrix of mesh vertex 3D positions
+  //   F  #F by 3 eigne Matrix of face (triangle) indices
+  //   weighting  Weighting type
+  // Output:
+  //   N  #V by 3 eigen Matrix of mesh vertex 3D normals
+  template <
+    typename DerivedV, 
+    typename DerivedF,
+    typename DerivedN>
+  IGL_INLINE void per_vertex_normals(
+    const Eigen::MatrixBase<DerivedV>& V,
+    const Eigen::MatrixBase<DerivedF>& F,
+    const igl::PerVertexNormalsWeightingType weighting,
+    Eigen::PlainObjectBase<DerivedN> & N);
+  // Without weighting
+  template <
+    typename DerivedV, 
+    typename DerivedF,
+    typename DerivedN>
+  IGL_INLINE void per_vertex_normals(
+    const Eigen::MatrixBase<DerivedV>& V,
+    const Eigen::MatrixBase<DerivedF>& F,
+    Eigen::PlainObjectBase<DerivedN> & N);
+  // Inputs:
+  //   FN  #F by 3 matrix of face (triangle) normals
+  template <typename DerivedV, typename DerivedF, typename DerivedFN, typename DerivedN>
+  IGL_INLINE void per_vertex_normals(
+    const Eigen::MatrixBase<DerivedV>& V,
+    const Eigen::MatrixBase<DerivedF>& F,
+    const PerVertexNormalsWeightingType weighting,
+    const Eigen::MatrixBase<DerivedFN>& FN,
+    Eigen::PlainObjectBase<DerivedN> & N);
+  // Without weighting
+  template <
+    typename DerivedV, 
+    typename DerivedF,
+    typename DerivedFN,
+    typename DerivedN>
+  IGL_INLINE void per_vertex_normals(
+    const Eigen::MatrixBase<DerivedV>& V,
+    const Eigen::MatrixBase<DerivedF>& F,
+    const Eigen::MatrixBase<DerivedFN>& FN,
+    Eigen::PlainObjectBase<DerivedN> & N);
+
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "per_vertex_normals.cpp"
+#endif
+
+#endif