Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/ray_mesh_intersect.h

@@ -0,0 +1,56 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2016 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_MESH_INTERSECT_H
+#define IGL_RAY_MESH_INTERSECT_H
+#include "igl_inline.h"
+#include "Hit.h"
+#include <Eigen/Core>
+#include <vector>
+namespace igl
+{
+  // Shoot a ray against a mesh (V,F) and collect all hits.
+  //
+  // Inputs:
+  //   source  3-vector origin of ray
+  //   dir  3-vector direction of ray
+  //   V  #V by 3 list of mesh vertex positions
+  //   F  #F by 3 list of mesh face indices into V
+  // Outputs:
+  //    hits  **sorted** list of hits
+  // Returns true if there were any hits (hits.size() > 0)
+  //
+  template <
+    typename Derivedsource,
+    typename Deriveddir,
+    typename DerivedV, 
+    typename DerivedF> 
+  IGL_INLINE bool ray_mesh_intersect(
+    const Eigen::MatrixBase<Derivedsource> & source,
+    const Eigen::MatrixBase<Deriveddir> & dir,
+    const Eigen::MatrixBase<DerivedV> & V,
+    const Eigen::MatrixBase<DerivedF> & F,
+    std::vector<igl::Hit> & hits);
+  // Outputs:
+  //   hit  first hit, set only if it exists
+  // Returns true if there was a hit
+  template <
+    typename Derivedsource,
+    typename Deriveddir,
+    typename DerivedV, 
+    typename DerivedF> 
+  IGL_INLINE bool ray_mesh_intersect(
+    const Eigen::MatrixBase<Derivedsource> & source,
+    const Eigen::MatrixBase<Deriveddir> & dir,
+    const Eigen::MatrixBase<DerivedV> & V,
+    const Eigen::MatrixBase<DerivedF> & F,
+    igl::Hit & hit);
+}
+#ifndef IGL_STATIC_LIBRARY
+#  include "ray_mesh_intersect.cpp"
+#endif
+#endif