Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/straighten_seams.h

@@ -0,0 +1,57 @@
+#ifndef IGL_STRAIGHTEN_SEAMS_H
+#define IGL_STRAIGHTEN_SEAMS_H
+
+#include "igl_inline.h"
+#include <Eigen/Core>
+
+namespace igl
+{
+  // STRAIGHTEN_SEAMS Given a obj-style mesh with (V,F) defining the geometric
+  // surface of the mesh and (VT,FT) defining the
+  // parameterization/texture-mapping of the mesh in the uv-domain, find all
+  // seams and boundaries in the texture-mapping and "straighten" them,
+  // remapping vertices along the boundary and in the interior. This will be
+  // careful to consistently straighten multiple seams in the texture-mesh
+  // corresponding to the same edge chains in the surface-mesh. 
+  //
+  // [UT] = straighten_seams(V,F,VT,FT)
+  //
+  // Inputs:
+  //  V  #V by 3 list of vertices
+  //  F  #F by 3 list of triangle indices
+  //  VT  #VT by 2 list of texture coordinates
+  //  FT  #F by 3 list of triangle texture coordinates
+  //  Optional:
+  //    'Tol'  followed by Ramer-Douglas-Peucker tolerance as a fraction of the
+  //      curves bounding box diagonal (see dpsimplify)
+  // Outputs:
+  //   UE  #UE by 2 list of indices into VT of coarse output polygon edges
+  //   UT  #VT by 3 list of new texture coordinates
+  //   OT  #OT by 2 list of indices into VT of boundary edges 
+  //
+  // See also: simplify_curve, dpsimplify
+  template <
+    typename DerivedV,
+    typename DerivedF,
+    typename DerivedVT,
+    typename DerivedFT,
+    typename Scalar,
+    typename DerivedUE,
+    typename DerivedUT,
+    typename DerivedOT>
+  IGL_INLINE void straighten_seams(
+    const Eigen::MatrixBase<DerivedV> & V,
+    const Eigen::MatrixBase<DerivedF> & F,
+    const Eigen::MatrixBase<DerivedVT> & VT,
+    const Eigen::MatrixBase<DerivedFT> & FT,
+    const Scalar tol,
+    Eigen::PlainObjectBase<DerivedUE> & UE,
+    Eigen::PlainObjectBase<DerivedUT> & UT,
+    Eigen::PlainObjectBase<DerivedOT> & OT);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "straighten_seams.cpp"
+#endif
+
+#endif