Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/project.h

@@ -0,0 +1,48 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2013 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_PROJECT_H
+#define IGL_PROJECT_H
+#include "igl_inline.h"
+#include <Eigen/Dense>
+namespace igl
+{
+  // Eigen reimplementation of gluProject
+  // Inputs:
+  //   obj*  3D objects' x, y, and z coordinates respectively
+  //   model  model matrix
+  //   proj  projection matrix
+  //   viewport  viewport vector
+  // Returns:
+  //   screen space x, y, and z coordinates respectively
+  template <typename Scalar>
+  IGL_INLINE Eigen::Matrix<Scalar,3,1> project(
+    const    Eigen::Matrix<Scalar,3,1>&  obj,
+    const    Eigen::Matrix<Scalar,4,4>& model,
+    const    Eigen::Matrix<Scalar,4,4>& proj,
+    const    Eigen::Matrix<Scalar,4,1>&  viewport);
+  // Inputs:
+  //   V  #V by 3 list of object points
+  //   model  model matrix
+  //   proj  projection matrix
+  //   viewport  viewport vector
+  // Outputs:
+  //   P  #V by 3 list of screen space points
+  template <typename DerivedV, typename DerivedM, typename DerivedN, typename DerivedO, typename DerivedP>
+  IGL_INLINE void project(
+    const    Eigen::PlainObjectBase<DerivedV>&  V,
+    const    Eigen::MatrixBase<DerivedM>& model,
+    const    Eigen::MatrixBase<DerivedN>& proj,
+    const    Eigen::MatrixBase<DerivedO>&  viewport,
+    Eigen::PlainObjectBase<DerivedP> & P);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "project.cpp"
+#endif
+
+#endif