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/*
****************************************************************************
*
* MODULE: v.transform
* AUTHOR(S): See other files as well...
* Eric G. Miller <egm2@jps.net>
* PURPOSE: To transform a vector layer's coordinates via a set of tie
* points.
* COPYRIGHT: (C) 2002 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
*****************************************************************************/
/*
* create_transform_conversion () - main driver routine to prepare
* the transformation equation.
*
* yes_no_quest(s) - ask the user a yes, no question.
* returns: 1 for yes, 0 for no
* Written by the GRASS Team, 02/16/90, -mh.
*/
#include <stdio.h>
#include <stdlib.h>
#include "glocale.h"
#include "gis.h"
#include "Vect.h"
#include "trans.h"
#include "local_proto.h"
int
create_transform_conversion (struct file_info *Coord, int quiet)
{
if ( Coord->name[0] != '\0')
create_transform_from_file( Coord, quiet) ;
else
create_transform_from_user () ;
return 0;
}
int
create_transform_from_user (void)
{
int status ;
int n_points;
int ok ;
init_transform_arrays() ;
n_points = 0 ;
ok = 0 ;
while (! ok)
{
/* go to Vask page to enter the coordinates */
if ((n_points = ask_transform_coor (n_points)) < 0)
exit(-1) ;
system("clear") ;
status = setup_transform( n_points) ;
if (status != ALL_OK )
{
G_message ( _(" Number of points that have been entered: %d\n"), n_points );
print_transform_error(status) ;
continue ;
}
print_transform_resids( n_points) ;
ok = yes_no_quest ("\n\n\nIf satisfied with the residuals, enter 'y', else 'n' and <Return>: ");
} /* while (!ok) */
return(0) ;
} /* create_transform_conversion() */
int
yes_no_quest (char *s)
{
char buff[200];
while (1)
{
G_message ( _("%s"),s);
if (NULL == fgets(buff,200,stdin))
exit(-1) ;
switch (*buff)
{
case 'Y': case 'y':
return(1);
case 'N': case 'n':
return(0);
default:
G_message ( _("Please answer yes or no"));
}
}
}
int
create_transform_from_file (struct file_info *Coord, int quiet)
{
int status ;
int n_points;
init_transform_arrays() ;
n_points = 0 ;
/* Get the coordinates from the file. */
if ((n_points = get_coor_from_file (Coord->fp) ) < 0)
exit(-1) ;
status = setup_transform( n_points) ;
if (status != ALL_OK )
{
G_message ( _("Number of points that have been entered: %d\n"), n_points );
print_transform_error(status) ;
exit(-1) ;
}
if (!quiet)
print_transform_resids( n_points) ;
return(0) ;
} /* create_transform_from_file() */
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