Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/remesh_along_isoline.h

@@ -0,0 +1,81 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2018 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_REMESH_ALONG_ISOLINE_H
+#define IGL_REMESH_ALONG_ISOLINE_H
+#include "igl_inline.h"
+
+#include <Eigen/Dense>
+#include <Eigen/Sparse>
+
+namespace igl 
+{
+  // Given a triangle mesh and a scalar field, remesh so that a given isovalue
+  // of the scalar field follows (new) edges of the output mesh. Effectively
+  // running "marching triangles" on mesh, but not in any coherent order. The
+  // output mesh should be as manifold as the input.
+  //
+  // Inputs:
+  //   V  #V by dim list of mesh vertex positions
+  //   F  #F by 3 list of mesh triangle indices into V
+  //   S  #V by 1 list of scalar field
+  //   val  value of S to remesh along
+  // Outputs:
+  //  U  #U by dim list of mesh vertex positions #U>=#V
+  //  G  #G by 3 list of mesh triangle indices into U, #G>=#F
+  //  SU  #U list of scalar field values over new mesh
+  //  J  #G list of indices into G revealing birth triangles
+  //  BC  #U by #V sparse matrix of barycentric coordinates so that U = BC*V
+  //  L  #G list of bools whether scalar field in triangle below or above val
+  template <
+    typename DerivedV,
+    typename DerivedF,
+    typename DerivedS,
+    typename DerivedU,
+    typename DerivedG,
+    typename DerivedJ,
+    typename BCtype,
+    typename DerivedSU,
+    typename DerivedL>
+    IGL_INLINE void remesh_along_isoline(
+      const Eigen::MatrixBase<DerivedV> & V,
+      const Eigen::MatrixBase<DerivedF> & F,
+      const Eigen::MatrixBase<DerivedS> & S,
+      const typename DerivedS::Scalar val,
+      Eigen::PlainObjectBase<DerivedU> & U,
+      Eigen::PlainObjectBase<DerivedG> & G,
+      Eigen::PlainObjectBase<DerivedSU> & SU,
+      Eigen::PlainObjectBase<DerivedJ> & J,
+      Eigen::SparseMatrix<BCtype> & BC,
+      Eigen::PlainObjectBase<DerivedL> & L);
+  // Input:
+  //   n  number of vertices (#V)
+  template <
+    typename DerivedF,
+    typename DerivedS,
+    typename DerivedG,
+    typename DerivedJ,
+    typename BCtype,
+    typename DerivedSU,
+    typename DerivedL>
+    IGL_INLINE void remesh_along_isoline(
+      const int n,
+      const Eigen::MatrixBase<DerivedF> & F,
+      const Eigen::MatrixBase<DerivedS> & S,
+      const typename DerivedS::Scalar val,
+      Eigen::PlainObjectBase<DerivedG> & G,
+      Eigen::PlainObjectBase<DerivedSU> & SU,
+      Eigen::PlainObjectBase<DerivedJ> & J,
+      Eigen::SparseMatrix<BCtype> & BC,
+      Eigen::PlainObjectBase<DerivedL> & L);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "remesh_along_isoline.h"
+#endif
+
+#endif