Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/project_to_line.h

@@ -0,0 +1,83 @@
+// 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_PROJECT_TO_LINE_H
+#define IGL_PROJECT_TO_LINE_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+
+namespace igl
+{
+  // PROJECT_TO_LINE  project points onto vectors, that is find the parameter
+  // t for a point p such that proj_p = (y-x).*t, additionally compute the
+  // squared distance from p to the line of the vector, such that 
+  // |p - proj_p|² = sqr_d
+  //
+  // [T,sqrD] = project_to_line(P,S,D)
+  //
+  // Inputs:
+  //   P  #P by dim list of points to be projected
+  //   S  size dim start position of line vector
+  //   D  size dim destination position of line vector
+  // Outputs:
+  //   T  #P by 1 list of parameters
+  //   sqrD  #P by 1 list of squared distances
+  //
+  //
+  template <
+    typename DerivedP, 
+    typename DerivedS, 
+    typename DerivedD, 
+    typename Derivedt, 
+    typename DerivedsqrD>
+  IGL_INLINE void project_to_line(
+    const Eigen::MatrixBase<DerivedP> & P,
+    const Eigen::MatrixBase<DerivedS> & S,
+    const Eigen::MatrixBase<DerivedD> & D,
+    Eigen::PlainObjectBase<Derivedt> & t,
+    Eigen::PlainObjectBase<DerivedsqrD> & sqrD);
+
+  // Same as above but for a single query point
+  template <typename Scalar>
+  IGL_INLINE void project_to_line(
+    const Scalar px,
+    const Scalar py,
+    const Scalar pz,
+    const Scalar sx,
+    const Scalar sy,
+    const Scalar sz,
+    const Scalar dx,
+    const Scalar dy,
+    const Scalar dz,
+    Scalar & projpx,
+    Scalar & projpy,
+    Scalar & projpz,
+    Scalar & t,
+    Scalar & sqrd);
+  
+  // Same as above but for a single query point
+  template <typename Scalar>
+  IGL_INLINE void project_to_line(
+    const Scalar px,
+    const Scalar py,
+    const Scalar pz,
+    const Scalar sx,
+    const Scalar sy,
+    const Scalar sz,
+    const Scalar dx,
+    const Scalar dy,
+    const Scalar dz,
+    Scalar & t,
+    Scalar & sqrd);
+
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "project_to_line.cpp"
+#endif
+
+#endif