Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/ray_box_intersect.h

@@ -0,0 +1,44 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2015 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_RAY_BOX_INTERSECT_H
+#define IGL_RAY_BOX_INTERSECT_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+#include <Eigen/Geometry>
+namespace igl
+{
+  // Determine whether a ray origin+t*dir and box intersect within the ray's parameterized
+  // range (t0,t1)
+  //
+  // Inputs:
+  //   source  3-vector origin of ray
+  //   dir  3-vector direction of ray
+  //   box  axis aligned box
+  //   t0  hit only if hit.t less than t0
+  //   t1  hit only if hit.t greater than t1
+  // Outputs:
+  //   tmin  minimum of interval of overlap within [t0,t1]
+  //   tmax  maximum of interval of overlap within [t0,t1]
+  // Returns true if hit
+  template <
+    typename Derivedsource,
+    typename Deriveddir,
+    typename Scalar>
+  IGL_INLINE bool ray_box_intersect(
+    const Eigen::MatrixBase<Derivedsource> & source,
+    const Eigen::MatrixBase<Deriveddir> & dir,
+    const Eigen::AlignedBox<Scalar,3> & box,
+    const Scalar & t0,
+    const Scalar & t1,
+    Scalar & tmin,
+    Scalar & tmax);
+}
+#ifndef IGL_STATIC_LIBRARY
+#  include "ray_box_intersect.cpp"
+#endif
+#endif