update bundled_deps

bundled_deps/libigl/igl/is_planar.h

@@ -0,0 +1,30 @@
+// 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_IS_PLANAR_H
+#define IGL_IS_PLANAR_H
+#include "igl_inline.h"
+
+#include <Eigen/Dense>
+
+namespace igl
+{
+  // Determine if a set of points lies on the XY plane
+  //
+  // Inputs:
+  //   V  #V by dim list of vertex positions
+  // Return true if a mesh has constant value of 0 in z coordinate
+  //
+  // Known bugs: Doesn't determine if vertex is flat if it doesn't lie on the
+  // XY plane.
+  IGL_INLINE bool is_planar(const Eigen::MatrixXd & V);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "is_planar.cpp"
+#endif
+#endif