Refactor folder (#10475)

Move many third-party components' source codes from the src folder to a new folder called deps_src. The goal is to make the code structure clearer and easier to navigate.

deps_src/libigl/igl/normalize_row_lengths.h

@@ -0,0 +1,37 @@
+// 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_NORMALIZE_ROW_LENGTHS_H
+#define IGL_NORMALIZE_ROW_LENGTHS_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+
+// History:
+// March 24, 2012: Alec changed function name from normalize_rows to
+//   normalize_row_lengths to avoid confusion with normalize_row_sums
+
+namespace igl
+{
+  // Obsolete: just use A.rowwise().normalize() or B=A.rowwise().normalized();
+  //
+  // Normalize the rows in A so that their lengths are each 1 and place the new
+  // entries in B
+  // Inputs:
+  //   A  #rows by k input matrix
+  // Outputs:
+  //   B  #rows by k input matrix, can be the same as A
+  template <typename DerivedV>
+  IGL_INLINE void normalize_row_lengths(
+   const Eigen::PlainObjectBase<DerivedV>& A,
+   Eigen::PlainObjectBase<DerivedV> & B);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "normalize_row_lengths.cpp"
+#endif
+
+#endif