text: /*
   * Copyright (c) 2013-2014, The University of Oxford
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. Neither the name of the University of Oxford nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef OSKAR_CONVERT_ENU_DIRECTIONS_TO_AZ_EL_H_
  #define OSKAR_CONVERT_ENU_DIRECTIONS_TO_AZ_EL_H_
  
  /**
   * @file oskar_convert_enu_directions_to_az_el.h
   */
  
  #include <oskar_global.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * @brief
   * Function to compute azimuth and elevation from horizontal direction
   * cosines (single precision).
   *
   * @details
   * Computes the azimuth and elevation from the given horizontal direction
   * cosines.
   *
   * The directions are:
   * <li> x - pointing East, </li>
   * <li> y - pointing North, </li>
   * <li> z - pointing to the zenith. </li>
   *
   * @param[in]  n  The number of points.
   * @param[in]  x  The x-direction-cosines.
   * @param[in]  y  The y-direction-cosines.
   * @param[in]  z  The z-direction-cosines.
   * @param[out] az The azimuths, in radians.
   * @param[out] el The elevations, in radians.
   */
  OSKAR_EXPORT
  void oskar_convert_enu_directions_to_az_el_f(int n, const float* x,
          const float* y, const float* z, float* az, float* el);
  
  /**
   * @brief
   * Function to compute azimuth and elevation from horizontal direction
   * cosines (double precision).
   *
   * @details
   * Computes the azimuth and elevation from the given horizontal direction
   * cosines.
   *
   * The directions are:
   * <li> x - pointing East, </li>
   * <li> y - pointing North, </li>
   * <li> z - pointing to the zenith. </li>
   *
   * @param[in]  n  The number of points.
   * @param[in]  x  The x-direction-cosines.
   * @param[in]  y  The y-direction-cosines.
   * @param[in]  z  The z-direction-cosines.
   * @param[out] az The azimuths, in radians.
   * @param[out] el The elevations, in radians.
   */
  OSKAR_EXPORT
  void oskar_convert_enu_directions_to_az_el_d(int n, const double* x,
          const double* y, const double* z, double* az, double* el);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* OSKAR_CONVERT_ENU_DIRECTIONS_TO_AZ_EL_H_ */
  