libigl_Martin/include/igl/project.h

// 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
{
  // Wrapper for gluProject that uses the current GL_MODELVIEW_MATRIX,
  // GL_PROJECTION_MATRIX, and GL_VIEWPORT
  // Inputs:
  //   obj*  3D objects' x, y, and z coordinates respectively
  // Outputs:
  //   win*  pointers to screen space x, y, and z coordinates respectively
  // Returns return value of gluProject call
  IGL_INLINE int project(
    const double objX,
    const double objY,
    const double objZ,
    double* winX,
    double* winY,
    double* winZ);
  // Eigen wrapper
  template <typename Derivedobj, typename Derivedwin>
  IGL_INLINE int project(
    const Eigen::PlainObjectBase<Derivedobj> & obj,
    Eigen::PlainObjectBase<Derivedwin> & win);
  // Eigen wrapper  with return
  template <typename Derivedobj>
  IGL_INLINE Eigen::PlainObjectBase<Derivedobj> project(
    const Eigen::PlainObjectBase<Derivedobj> & obj);
}

#ifdef IGL_HEADER_ONLY
#  include "project.cpp"
#endif

#endif