Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/point_mesh_squared_distance.h

@@ -0,0 +1,52 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2014 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_POINT_MESH_SQUARED_DISTANCE_H
+#define IGL_POINT_MESH_SQUARED_DISTANCE_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+#include <vector>
+
+namespace igl
+{
+  // Compute distances from a set of points P to a triangle mesh (V,F)
+  //
+  // Inputs:
+  //   P  #P by 3 list of query point positions
+  //   V  #V by 3 list of vertex positions
+  //   Ele  #Ele by (3|2|1) list of (triangle|edge|point) indices
+  // Outputs:
+  //   sqrD  #P list of smallest squared distances
+  //   I  #P list of primitive indices corresponding to smallest distances
+  //   C  #P by 3 list of closest points
+  //
+  // Known bugs: This only computes distances to given primitivess. So
+  // unreferenced vertices are ignored. However, degenerate primitives are
+  // handled correctly: triangle [1 2 2] is treated as a segment [1 2], and
+  // triangle [1 1 1] is treated as a point. So one _could_ add extra
+  // combinatorially degenerate rows to Ele for all unreferenced vertices to
+  // also get distances to points.
+  template <
+    typename DerivedP,
+    typename DerivedV,
+    typename DerivedsqrD,
+    typename DerivedI,
+    typename DerivedC>
+  IGL_INLINE void point_mesh_squared_distance(
+    const Eigen::PlainObjectBase<DerivedP> & P,
+    const Eigen::PlainObjectBase<DerivedV> & V,
+    const Eigen::MatrixXi & Ele, 
+    Eigen::PlainObjectBase<DerivedsqrD> & sqrD,
+    Eigen::PlainObjectBase<DerivedI> & I,
+    Eigen::PlainObjectBase<DerivedC> & C);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "point_mesh_squared_distance.cpp"
+#endif
+
+#endif