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/opengl2/right_axis.h

@@ -0,0 +1,34 @@
+// 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_OPENGL2_RIGHT_AXIS_H
+#define IGL_OPENGL2_RIGHT_AXIS_H 
+#include "../igl_inline.h"
+namespace igl
+{
+  namespace opengl2
+  {
+    // Determines the right axis or depth axis of the current gl matrix
+    // Outputs:
+    //   x  pointer to x-coordinate in scene coordinates of the un-normalized
+    //     right axis 
+    //   y  pointer to y-coordinate in scene coordinates of the un-normalized
+    //     right axis 
+    //   z  pointer to z-coordinate in scene coordinates of the un-normalized
+    //     right axis
+    //   mv pointer to modelview matrix
+    //
+    // Note: Right axis is returned *UN-normalized*
+    IGL_INLINE void right_axis(double * x, double * y, double * z);
+    IGL_INLINE void right_axis(const double * mv, double * x, double * y, double * z);
+  }
+};
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "right_axis.cpp"
+#endif
+#endif