Preliminary Eigen support. One unittest still fails

refs #59

src/OpenMesh/Core/Geometry/EigenVectorT.hh

@@ -0,0 +1,106 @@
+/* ========================================================================= *
+ *                                                                           *
+ *                               OpenMesh                                    *
+ *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
+ *           Department of Computer Graphics and Multimedia                  *
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+ * This file is part of OpenMesh.                                            *
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+ * modification, are permitted provided that the following conditions        *
+ * are met:                                                                  *
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+ *                                                                           *
+ * ========================================================================= */
+
+/** This file contains all code required to use Eigen3 vectors as Mesh
+ *  vectors
+ */
+#pragma once
+
+#include <Eigen/Core>
+#include <Eigen/Dense>
+#include <Eigen/Geometry>
+
+
+namespace OpenMesh {
+  template <typename _Scalar, int _Rows, int _Cols, int _Options>
+  struct vector_traits<Eigen::Matrix<_Scalar, _Rows, _Cols, _Options>> {
+      static_assert(_Rows != Eigen::Dynamic && _Cols != Eigen::Dynamic,
+                    "Should not use dynamic vectors.");
+      static_assert(_Rows == 1 || _Cols == 1, "Should not use matrices.");
+
+      using vector_type = Eigen::Matrix<_Scalar, _Rows, _Cols, _Options>;
+      using value_type = _Scalar;
+      static const size_t size_ = _Rows * _Cols;
+      static size_t size() { return size_; }
+};
+
+} // namespace OpenMesh
+
+namespace Eigen {
+
+  template <typename Derived>
+  typename Derived::Scalar dot(const MatrixBase<Derived> &x,
+                               const MatrixBase<Derived> &y) {
+      return x.dot(y);
+  }
+
+  template <typename Derived>
+  typename MatrixBase< Derived >::PlainObject cross(const MatrixBase<Derived> &x, const MatrixBase<Derived> &y) {
+      return x.cross(y);
+  }
+
+  template <typename Derived>
+  typename Derived::Scalar norm(const MatrixBase<Derived> &x) {
+      return x.norm();
+  }
+
+  template <typename Derived>
+  typename Derived::Scalar sqrnorm(const MatrixBase<Derived> &x) {
+      return x.dot(x);
+  }
+
+  template <typename Derived>
+  MatrixBase<Derived> normalize(MatrixBase<Derived> &x) {
+      std::cerr << "Norm : " << x.norm() << std::endl;
+      x /= x.norm();
+      std::cerr << "Norm : " << x << std::endl;
+      return x;
+  }
+
+  template <typename Derived>
+  MatrixBase<Derived> &vectorize(MatrixBase<Derived> &x,
+                                 typename Derived::Scalar const &val) {
+      x.fill(val);
+      return x;
+  }
+
+} // namespace Eigen
+