Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/snap_to_canonical_view_quat.h

@@ -0,0 +1,44 @@
+// 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_SNAP_TO_CANONICAL_VIEW_QUAT_H
+#define IGL_SNAP_TO_CANONICAL_VIEW_QUAT_H
+#include "igl_inline.h"
+#include <Eigen/Geometry>
+// A Quaternion, q, is defined here as an arrays of four scalars (x,y,z,w),
+// such that q = x*i + y*j + z*k + w
+namespace igl
+{
+  // Snap the quaternion q to the nearest canonical view quaternion
+  // Input:
+  //   q  quaternion to be snapped (also see Outputs)
+  //   threshold  (optional) threshold:
+  //     1.0 --> snap any input
+  //     0.5 --> snap inputs somewhat close to canonical views
+  //     0.0 --> snap no input
+  // Output:
+  //   q  quaternion possibly set to nearest canonical view
+  // Return:
+  //   true only if q was snapped to the nearest canonical view
+  template <typename Q_type>
+  IGL_INLINE bool snap_to_canonical_view_quat(
+    const Q_type* q,
+    const Q_type threshold,
+    Q_type* s);
+
+  template <typename Scalarq, typename Scalars>
+  IGL_INLINE bool snap_to_canonical_view_quat(
+    const Eigen::Quaternion<Scalarq> & q,
+    const double threshold,
+    Eigen::Quaternion<Scalars> & s);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "snap_to_canonical_view_quat.cpp"
+#endif
+
+#endif