Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/ramer_douglas_peucker.h

@@ -0,0 +1,49 @@
+#ifndef IGL_RAMER_DOUGLAS_PEUCKER_H
+#define IGL_RAMER_DOUGLAS_PEUCKER_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  // Ramer-Douglas-Peucker piecewise-linear curve simplification.
+  //
+  // Inputs:
+  //   P  #P by dim ordered list of vertices along the curve
+  //   tol  tolerance (maximal euclidean distance allowed between the new line
+  //     and a vertex)
+  // Outputs:
+  //   S  #S by dim ordered list of points along the curve
+  //   J  #S list of indices into P so that S = P(J,:)
+  template <typename DerivedP, typename DerivedS, typename DerivedJ>
+  IGL_INLINE void ramer_douglas_peucker(
+    const Eigen::MatrixBase<DerivedP> & P,
+    const typename DerivedP::Scalar tol,
+    Eigen::PlainObjectBase<DerivedS> & S,
+    Eigen::PlainObjectBase<DerivedJ> & J);
+  // Run (Ramer-)Duglass-Peucker curve simplification but keep track of where
+  // every point on the original curve maps to on the simplified curve.
+  //
+  // Inputs:
+  //   P  #P by dim list of points, (use P([1:end 1],:) for loops)
+  //   tol  DP tolerance
+  // Outputs:
+  //   S  #S by dim list of points along simplified curve
+  //   J  #S indices into P of simplified points
+  //   Q  #P by dim list of points mapping along simplified curve
+  //
+  template <
+    typename DerivedP, 
+    typename DerivedS, 
+    typename DerivedJ,
+    typename DerivedQ>
+  IGL_INLINE void ramer_douglas_peucker(
+    const Eigen::MatrixBase<DerivedP> & P,
+    const typename DerivedP::Scalar tol,
+    Eigen::PlainObjectBase<DerivedS> & S,
+    Eigen::PlainObjectBase<DerivedJ> & J,
+    Eigen::PlainObjectBase<DerivedQ> & Q);
+
+}
+#ifndef IGL_STATIC_LIBRARY
+#  include "ramer_douglas_peucker.cpp"
+#endif
+#endif