/* VModis_interpol.h */

/*
remap
Copyright (C) 2006 Fabrice Ducos, fabrice.ducos@icare.univ-lille1.fr

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.
*/

#include "common.h"

typedef enum {
  INTERP_SWATH
} PROJTYPE;

typedef enum {
  INTERP_BOUNDS,
  INTERP_CENTERS
} INTERP_OUTPUT;

typedef struct {
  struct {
    int Nl;
    int Np;
  } sds;
  struct {
    PROJTYPE type;
  } projparam;
  int Nl_geo;
  int Np_geo;
  float rowoffset;
  float rowstep;
  float coloffset;
  float colstep;
} PRODUCT;

/*
  Example for get_step_and_offset:

  get_step_and_offset(input.sds.Nl, input.Nl_geo, &input.rowoffset, 
  &input.rowstep, input.projparam.type, FALSE);
  get_step_and_offset(input.sds.Np, input.Np_geo, &input.coloffset, 
  &input.colstep, input.projparam.type, TRUE);
*/

void get_step_and_offset(int n1, int n2, float *offset, float *step, 
			 int rowsperscan, int georowsamplingstep, unsigned char crosstrack);

void resample_row_geolocation(INTERP_OUTPUT output /* INTERP_BOUNDS or INTERP_CENTERS */, double *oldlon, 
			      double *oldlat, PRODUCT *product, coord_type *newlon, coord_type *newlat);

void get_virtual_row(const coord_type *lon1, const coord_type *lat1, const coord_type *lon2, const coord_type *lat2, double t, int ncols, double *lon3, double *lat3);

void get_georows(double fractrow, PRODUCT *input, int iscan, int *georow1, int *georow2, double *t);