/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2011 Blender Foundation.
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation,
 *                 Sergey Sharybin
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "intern/homography.h"
#include "intern/utildefines.h"
#include "libmv/logging/logging.h"
#include "libmv/multiview/homography.h"

void libmv_homography2DFromCorrespondencesEuc(/* const */ double (*x1)[2],
                                              /* const */ double (*x2)[2],
                                              int num_points,
                                              double H[3][3]) {
  libmv::Mat x1_mat, x2_mat;
  libmv::Mat3 H_mat;

  x1_mat.resize(2, num_points);
  x2_mat.resize(2, num_points);

  for (int i = 0; i < num_points; i++) {
    x1_mat.col(i) = libmv::Vec2(x1[i][0], x1[i][1]);
    x2_mat.col(i) = libmv::Vec2(x2[i][0], x2[i][1]);
  }

  LG << "x1: " << x1_mat;
  LG << "x2: " << x2_mat;

  libmv::EstimateHomographyOptions options;
  libmv::EstimateHomography2DFromCorrespondences(x1_mat,
                                                 x2_mat,
                                                 options,
                                                 &H_mat);

  LG << "H: " << H_mat;

  memcpy(H, H_mat.data(), 9 * sizeof(double));
}