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/rotate_vectors.h

@@ -0,0 +1,40 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2014 Daniele Panozzo <daniele.panozzo@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_ROTATE_VECTORS_H
+#define IGL_ROTATE_VECTORS_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  // Rotate the vectors V by A radiants on the tangent plane spanned by B1 and
+  // B2
+  //
+  // Inputs:
+  //   V     #V by 3 eigen Matrix of vectors
+  //   A     #V eigen vector of rotation angles or a single angle to be applied
+  //     to all vectors
+  //   B1    #V by 3 eigen Matrix of base vector 1
+  //   B2    #V by 3 eigen Matrix of base vector 2
+  //
+  // Output:
+  //   Returns the rotated vectors
+  //
+  IGL_INLINE Eigen::MatrixXd rotate_vectors(
+                                            const Eigen::MatrixXd& V,
+                                            const Eigen::VectorXd& A,
+                                            const Eigen::MatrixXd& B1,
+                                            const Eigen::MatrixXd& B2);
+
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "rotate_vectors.cpp"
+#endif
+
+#endif