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/*-
*
* Original program and various modifications:
* Lubos Mitas
*
* GRASS4.1 version of the program and GRASS4.2 modifications:
* H. Mitasova
* I. Kosinovsky, D. Gerdes
* D. McCauley
*
* Copyright 1993, 1995:
* L. Mitas ,
* H. Mitasova ,
* I. Kosinovsky, ,
* D.Gerdes
* D. McCauley
*
* modified by McCauley in August 1995
* modified by Mitasova in August 1995, Nov. 1996
*
*/
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <grass/gis.h>
#include <grass/site.h>
#include <grass/Vect.h>
#include <grass/dbmi.h>
#define POINT2D_C
#include <grass/interpf.h>
/* needed for AIX */
#ifdef hz
#undef hz
#endif
int IL_check_at_points_2d(struct interp_params *params, struct quaddata *data, /* current region */
double *b, /* solution of linear equations */
double *ertot, /* total error */
double zmin, /* min z-value */
double dnorm, struct triple skip_point)
/*
* Checks if interpolating function interp() evaluates correct z-values at
* given points. If smoothing is used calculate the maximum error caused
* by smoothing.
*/
{
int n_points = data->n_points; /* number of points */
struct triple *points = data->points; /* points for interpolation */
double east = data->xmax;
double west = data->x_orig;
double north = data->ymax;
double south = data->y_orig;
double rfsta2, errmax, h, xx, yy, r2, hz, zz, err, xmm, ymm, r;
double skip_err;
int n1, mm, m, cat;
double fstar2;
int inside;
/* Site *site; */
char buf[1024];
/* if ((site = G_site_new_struct (-1, 2, 0, 1)) == NULL)
G_fatal_error ("Memory error for site struct"); */
fstar2 = params->fi * params->fi / 4.;
errmax = .0;
n1 = n_points + 1;
for (mm = 1; mm <= n_points; mm++) {
h = b[0];
for (m = 1; m <= n_points; m++) {
xx = points[mm - 1].x - points[m - 1].x;
yy = points[mm - 1].y - points[m - 1].y;
r2 = yy * yy + xx * xx;
if (r2 != 0.) {
rfsta2 = fstar2 * r2;
r = r2;
h = h + b[m] * params->interp(r, params->fi);
}
}
/* modified by helena january 1997 - normalization of z was
removed from segm2d.c and interp2d.c
hz = (h * dnorm) + zmin;
zz = (points[mm - 1].z * dnorm) + zmin;
*/
hz = h + zmin;
zz = points[mm - 1].z + zmin;
err = hz - zz;
xmm = points[mm - 1].x * dnorm + params->x_orig + west;
ymm = points[mm - 1].y * dnorm + params->y_orig + south;
if ((xmm >= west + params->x_orig) && (xmm <= east + params->x_orig)
&& (ymm >= south + params->y_orig) &&
(ymm <= north + params->y_orig))
inside = 1;
else
inside = 0;
if (params->fddevi != NULL) {
if (inside) { /* if the point is inside the region */
Vect_reset_line(Pnts);
Vect_reset_cats(Cats2);
Vect_append_point(Pnts, xmm, ymm, zz);
cat = count;
Vect_cat_set(Cats2, 1, cat);
Vect_write_line(&Map2, GV_POINT, Pnts, Cats2);
db_zero_string(&sql2);
sprintf(buf, "insert into %s values ( %d ", ff->table, cat);
db_append_string(&sql2, buf);
sprintf(buf, ", %f", err);
db_append_string(&sql2, buf);
db_append_string(&sql2, ")");
G_debug(3, "IL_check_at_points_2d: %s", db_get_string(&sql2));
if (db_execute_immediate(driver2, &sql2) != DB_OK) {
db_close_database(driver2);
db_shutdown_driver(driver2);
G_fatal_error("Cannot insert new row: %s",
db_get_string(&sql2));
}
count++;
}
}
(*ertot) += err * err;
}
/* cv stuff */
if (params->cv) {
h = b[0];
for (m = 1; m <= n_points - 1; m++) {
xx = points[m - 1].x - skip_point.x;
yy = points[m - 1].y - skip_point.y;
r2 = yy * yy + xx * xx;
if (r2 != 0.) {
rfsta2 = fstar2 * r2;
r = r2;
h = h + b[m] * params->interp(r, params->fi);
}
}
hz = h + zmin;
zz = skip_point.z + zmin;
skip_err = hz - zz;
xmm = skip_point.x * dnorm + params->x_orig + west;
ymm = skip_point.y * dnorm + params->y_orig + south;
if ((xmm >= west + params->x_orig) && (xmm <= east + params->x_orig)
&& (ymm >= south + params->y_orig) &&
(ymm <= north + params->y_orig))
inside = 1;
else
inside = 0;
if (inside) { /* if the point is inside the region */
Vect_reset_line(Pnts);
Vect_reset_cats(Cats2);
Vect_append_point(Pnts, xmm, ymm, zz);
cat = count;
Vect_cat_set(Cats2, 1, cat);
Vect_write_line(&Map2, GV_POINT, Pnts, Cats2);
db_zero_string(&sql2);
sprintf(buf, "insert into %s values ( %d ", ff->table, cat);
db_append_string(&sql2, buf);
sprintf(buf, ", %f", skip_err);
db_append_string(&sql2, buf);
db_append_string(&sql2, ")");
G_debug(3, "IL_check_at_points_2d: %s", db_get_string(&sql2));
if (db_execute_immediate(driver2, &sql2) != DB_OK) {
db_close_database(driver2);
db_shutdown_driver(driver2);
G_fatal_error("Cannot insert new row: %s",
db_get_string(&sql2));
}
count++;
}
} /* cv */
return 1;
}
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