read directly into CGAL types

Former-commit-id: acfb0a92ca6c89b37f57f6c82220068e3edc36df

include/igl/copyleft/cgal/read_triangle_mesh.cpp

@@ -0,0 +1,26 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2016 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/.
+
+#include "read_triangle_mesh.h"
+#include "assign.h"
+#include "../../read_triangle_mesh.h"
+
+template <typename DerivedV, typename DerivedF>
+IGL_INLINE bool igl::copyleft::cgal::read_triangle_mesh(
+  const std::string str,
+  Eigen::PlainObjectBase<DerivedV>& V,
+  Eigen::PlainObjectBase<DerivedF>& F)
+{
+  Eigen::MatrixXd Vd;
+  bool ret = igl::read_triangle_mesh(str,Vd,F);
+  if(ret)
+  {
+    assign(Vd,V);
+  }
+  return ret;
+}

include/igl/copyleft/cgal/read_triangle_mesh.h

@@ -0,0 +1,42 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2016 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_COPYLEFT_CGAL_READ_TRIANGLE_MESH_H
+#define IGL_COPYLEFT_CGAL_READ_TRIANGLE_MESH_H
+#include "../../igl_inline.h"
+
+#include <Eigen/Core>
+namespace igl
+{
+  namespace copyleft
+  {
+    namespace cgal
+    {
+      // Simple wrapper, reads floating point precision but assigns to
+      // DerivedV::Scalar which may be a CGAL type
+      //
+      // Inputs:
+      //   str  path to file
+      // Outputs:
+      //   V  eigen double matrix #V by 3
+      //   F  eigen int matrix #F by 3
+      // Returns true iff success
+      template <typename DerivedV, typename DerivedF>
+      IGL_INLINE bool read_triangle_mesh(
+        const std::string str,
+        Eigen::PlainObjectBase<DerivedV>& V,
+        Eigen::PlainObjectBase<DerivedF>& F);
+    }
+  }
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "read_triangle_mesh.cpp"
+#endif
+
+#endif
+