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test_gradient.c
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test_gradient.c
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/*****************************************************************************
*
* MODULE: Grass PDE Numerical Library
* AUTHOR(S): Soeren Gebbert, Berlin (GER) Dec 2006
* soerengebbert <at> gmx <dot> de
*
* PURPOSE: Unit tests for gradient calculation
*
* COPYRIGHT: (C) 2000 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.
*
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <grass/N_pde.h>
#include "test_gpde_lib.h"
/* prototypes */
static int test_gradient_2d(void);
static int test_gradient_3d(void);
static N_array_2d *create_relax_array_2d(void);
static N_array_3d *create_relax_array_3d(void);
static N_array_2d *create_potential_array_2d(void);
static N_array_3d *create_potential_array_3d(void);
/* *************************************************************** */
/* Perform the gradient tests *********************************** */
/* *************************************************************** */
int unit_test_gradient(void)
{
int sum = 0;
G_message("\n++ Running gradient unit tests ++");
G_message("\t 1. testing 2d gradient");
sum += test_gradient_2d();
G_message("\t 2. testing 3d gradient");
sum += test_gradient_3d();
if (sum > 0)
G_warning("\n-- Gradient unit tests failure --");
else
G_message("\n-- Gradient unit tests finished successfully --");
return sum;
}
/* *************************************************************** */
/* Create the status array with values of 1 and 2 **************** */
/* *************************************************************** */
N_array_2d *create_relax_array_2d(void)
{
N_array_2d *data;
int i, j;
data = N_alloc_array_2d(TEST_N_NUM_COLS, TEST_N_NUM_ROWS, 1, CELL_TYPE);
#pragma omp parallel for private(i, j) shared(data)
for (j = 0; j < TEST_N_NUM_ROWS; j++) {
for (i = 0; i < TEST_N_NUM_COLS; i++) {
N_put_array_2d_c_value(data, i, j, 1);
}
}
return data;
}
/* *************************************************************** */
/* Create a value array ****************************************** */
/* *************************************************************** */
N_array_2d *create_potential_array_2d(void)
{
N_array_2d *data;
int i, j;
data = N_alloc_array_2d(TEST_N_NUM_COLS, TEST_N_NUM_ROWS, 1, DCELL_TYPE);
#pragma omp parallel for private(i, j) shared(data)
for (j = 0; j < TEST_N_NUM_ROWS; j++) {
for (i = 0; i < TEST_N_NUM_COLS; i++) {
N_put_array_2d_d_value(data, i, j, (double)i * j);
}
}
return data;
}
/* *************************************************************** */
/* Create the status array with values of 1 and 2 **************** */
/* *************************************************************** */
N_array_3d *create_relax_array_3d(void)
{
N_array_3d *data;
int i, j, k;
data = N_alloc_array_3d(TEST_N_NUM_COLS, TEST_N_NUM_ROWS, TEST_N_NUM_DEPTHS,
1, FCELL_TYPE);
#pragma omp parallel for private(i, j, k) shared(data)
for (k = 0; k < TEST_N_NUM_DEPTHS; k++) {
for (j = 0; j < TEST_N_NUM_ROWS; j++) {
for (i = 0; i < TEST_N_NUM_COLS; i++) {
N_put_array_3d_f_value(data, i, j, k, 1.0);
}
}
}
return data;
}
/* *************************************************************** */
/* Create a value array ****************************************** */
/* *************************************************************** */
N_array_3d *create_potential_array_3d(void)
{
N_array_3d *data;
int i, j, k;
data = N_alloc_array_3d(TEST_N_NUM_COLS, TEST_N_NUM_ROWS, TEST_N_NUM_DEPTHS,
1, DCELL_TYPE);
#pragma omp parallel for private(i, j, k) shared(data)
for (k = 0; k < TEST_N_NUM_DEPTHS; k++)
for (j = 0; j < TEST_N_NUM_ROWS; j++) {
for (i = 0; i < TEST_N_NUM_COLS; i++) {
N_put_array_3d_f_value(data, i, j, k, (float)i * j * k);
}
}
return data;
}
/* *************************************************************** */
/* Test the gradient calculation with 3d array data ************** */
/* *************************************************************** */
int test_gradient_3d(void)
{
N_array_3d *relax = NULL;
N_array_3d *pot = NULL;
N_array_3d *xcomp = NULL;
N_array_3d *ycomp = NULL;
N_array_3d *zcomp = NULL;
N_gradient_field_3d *field = NULL;
N_gradient_3d *grad = NULL;
N_geom_data *geom = NULL;
geom = N_alloc_geom_data();
geom->dx = 1;
geom->dy = 1;
geom->dz = 1;
geom->Az = 1;
geom->planimetric = 1;
geom->depths = TEST_N_NUM_DEPTHS;
geom->rows = TEST_N_NUM_ROWS;
geom->cols = TEST_N_NUM_COLS;
relax = create_relax_array_3d();
pot = create_potential_array_3d();
field = N_compute_gradient_field_3d(pot, relax, relax, relax, geom, NULL);
field = N_compute_gradient_field_3d(pot, relax, relax, relax, geom, field);
/*compute stats */
N_calc_gradient_field_3d_stats(field);
N_print_gradient_field_3d_info(field);
N_free_gradient_field_3d(field);
N_free_array_3d(relax);
N_free_array_3d(pot);
relax = N_alloc_array_3d(3, 3, 3, 0, DCELL_TYPE);
pot = N_alloc_array_3d(3, 3, 3, 0, DCELL_TYPE);
xcomp = N_alloc_array_3d(3, 3, 3, 0, DCELL_TYPE);
ycomp = N_alloc_array_3d(3, 3, 3, 0, DCELL_TYPE);
zcomp = N_alloc_array_3d(3, 3, 3, 0, DCELL_TYPE);
N_put_array_3d_d_value(relax, 0, 0, 0, 1);
N_put_array_3d_d_value(relax, 0, 1, 0, 1);
N_put_array_3d_d_value(relax, 0, 2, 0, 1);
N_put_array_3d_d_value(relax, 1, 0, 0, 1);
N_put_array_3d_d_value(relax, 1, 1, 0, 1);
N_put_array_3d_d_value(relax, 1, 2, 0, 1);
N_put_array_3d_d_value(relax, 2, 0, 0, 1);
N_put_array_3d_d_value(relax, 2, 1, 0, 1);
N_put_array_3d_d_value(relax, 2, 2, 0, 1);
N_put_array_3d_d_value(relax, 0, 0, 1, 1);
N_put_array_3d_d_value(relax, 0, 1, 1, 1);
N_put_array_3d_d_value(relax, 0, 2, 1, 1);
N_put_array_3d_d_value(relax, 1, 0, 1, 1);
N_put_array_3d_d_value(relax, 1, 1, 1, 1);
N_put_array_3d_d_value(relax, 1, 2, 1, 1);
N_put_array_3d_d_value(relax, 2, 0, 1, 1);
N_put_array_3d_d_value(relax, 2, 1, 1, 1);
N_put_array_3d_d_value(relax, 2, 2, 1, 1);
N_put_array_3d_d_value(relax, 0, 0, 2, 1);
N_put_array_3d_d_value(relax, 0, 1, 2, 1);
N_put_array_3d_d_value(relax, 0, 2, 2, 1);
N_put_array_3d_d_value(relax, 1, 0, 2, 1);
N_put_array_3d_d_value(relax, 1, 1, 2, 1);
N_put_array_3d_d_value(relax, 1, 2, 2, 1);
N_put_array_3d_d_value(relax, 2, 0, 2, 1);
N_put_array_3d_d_value(relax, 2, 1, 2, 1);
N_put_array_3d_d_value(relax, 2, 2, 2, 1);
/**
* 1 2 6 5
* 3 7 10 == -4 -3
* 8 15 25 8
* */
N_put_array_3d_d_value(pot, 0, 0, 0, 1.0);
N_put_array_3d_d_value(pot, 1, 0, 0, 2.0);
N_put_array_3d_d_value(pot, 2, 0, 0, 6.0);
N_put_array_3d_d_value(pot, 0, 1, 0, 3.0);
N_put_array_3d_d_value(pot, 1, 1, 0, 7.0);
N_put_array_3d_d_value(pot, 2, 1, 0, 10.0);
N_put_array_3d_d_value(pot, 0, 2, 0, 8.0);
N_put_array_3d_d_value(pot, 1, 2, 0, 15.0);
N_put_array_3d_d_value(pot, 2, 2, 0, 25.0);
N_put_array_3d_d_value(pot, 0, 0, 1, 1.2);
N_put_array_3d_d_value(pot, 1, 0, 1, 2.2);
N_put_array_3d_d_value(pot, 2, 0, 1, 6.2);
N_put_array_3d_d_value(pot, 0, 1, 1, 3.2);
N_put_array_3d_d_value(pot, 1, 1, 1, 7.2);
N_put_array_3d_d_value(pot, 2, 1, 1, 10.2);
N_put_array_3d_d_value(pot, 0, 2, 1, 8.2);
N_put_array_3d_d_value(pot, 1, 2, 1, 15.2);
N_put_array_3d_d_value(pot, 2, 2, 1, 25.2);
N_put_array_3d_d_value(pot, 0, 0, 2, 1.5);
N_put_array_3d_d_value(pot, 1, 0, 2, 2.5);
N_put_array_3d_d_value(pot, 2, 0, 2, 6.5);
N_put_array_3d_d_value(pot, 0, 1, 2, 3.5);
N_put_array_3d_d_value(pot, 1, 1, 2, 7.5);
N_put_array_3d_d_value(pot, 2, 1, 2, 10.5);
N_put_array_3d_d_value(pot, 0, 2, 2, 8.5);
N_put_array_3d_d_value(pot, 1, 2, 2, 15.5);
N_put_array_3d_d_value(pot, 2, 2, 2, 25.5);
geom->depths = 3;
geom->rows = 3;
geom->cols = 3;
field = N_compute_gradient_field_3d(pot, relax, relax, relax, geom, NULL);
field = N_compute_gradient_field_3d(pot, relax, relax, relax, geom, field);
N_print_gradient_field_3d_info(field);
grad = N_get_gradient_3d(field, NULL, 0, 0, 0);
printf("Gradient 3d: NC %g == 0 ; SC %g == 2 ; WC %g == 0 ; EC %g == -1 BC "
"%g == 0 TC %g == -0.2\n",
grad->NC, grad->SC, grad->WC, grad->EC, grad->BC, grad->TC);
grad = N_get_gradient_3d(field, grad, 1, 0, 0);
printf("Gradient 3d: NC %g == 0 ; SC %g == 5 ; WC %g == -1 ; EC %g == -4 "
"BC %g == 0 TC %g == -0.2\n",
grad->NC, grad->SC, grad->WC, grad->EC, grad->BC, grad->TC);
N_free_gradient_3d(grad);
grad = N_get_gradient_3d(field, NULL, 1, 1, 1);
printf("Gradient 3d: NC %g == 5 ; SC %g == 8 ; WC %g == -4 ; EC %g == -3 "
"BC %g == -0.2 TC %g == -0.3\n",
grad->NC, grad->SC, grad->WC, grad->EC, grad->BC, grad->TC);
grad = N_get_gradient_3d(field, grad, 1, 2, 2);
printf("Gradient 3d: NC %g == 8 ; SC %g == 0 ; WC %g == -7 ; EC %g == -10 "
"BC %g == -0.3 TC %g == 0\n",
grad->NC, grad->SC, grad->WC, grad->EC, grad->BC, grad->TC);
N_free_gradient_3d(grad);
grad = N_get_gradient_3d(field, NULL, 2, 2, 2);
printf("Gradient 3d: NC %g ==15 ; SC %g == 0 ; WC %g == -10 ; EC %g == 0 "
"BC %g == -0.3 TC %g == 0\n",
grad->NC, grad->SC, grad->WC, grad->EC, grad->BC, grad->TC);
N_free_gradient_3d(grad);
N_compute_gradient_field_components_3d(field, xcomp, ycomp, zcomp);
/*
N_print_array_3d(xcomp);
N_print_array_3d(ycomp);
N_print_array_3d(zcomp);
*/
N_free_gradient_field_3d(field);
G_free(geom);
N_free_array_3d(xcomp);
N_free_array_3d(ycomp);
N_free_array_3d(zcomp);
N_free_array_3d(relax);
N_free_array_3d(pot);
return 0;
}
/* *************************************************************** */
/* Test the gradient calculation with 2d array data ************** */
/* *************************************************************** */
int test_gradient_2d(void)
{
N_array_2d *relax = NULL;
N_array_2d *pot = NULL;
N_array_2d *xcomp = NULL;
N_array_2d *ycomp = NULL;
N_gradient_field_2d *field = NULL;
N_geom_data *geom = NULL;
N_gradient_2d *grad = NULL;
N_gradient_neighbours_2d *grad_2d = NULL;
geom = N_alloc_geom_data();
geom->dx = 1;
geom->dy = 1;
geom->dz = 1;
geom->Az = 1;
geom->planimetric = 1;
geom->rows = TEST_N_NUM_ROWS;
geom->cols = TEST_N_NUM_COLS;
relax = create_relax_array_2d();
pot = create_potential_array_2d();
field = N_compute_gradient_field_2d(pot, relax, relax, geom, field);
field = N_compute_gradient_field_2d(pot, relax, relax, geom, field);
/*compute stats */
N_calc_gradient_field_2d_stats(field);
N_print_gradient_field_2d_info(field);
N_free_gradient_field_2d(field);
N_free_array_2d(relax);
N_free_array_2d(pot);
relax = N_alloc_array_2d(3, 3, 0, DCELL_TYPE);
pot = N_alloc_array_2d(3, 3, 0, DCELL_TYPE);
xcomp = N_alloc_array_2d(3, 3, 0, DCELL_TYPE);
ycomp = N_alloc_array_2d(3, 3, 0, DCELL_TYPE);
N_put_array_2d_d_value(relax, 0, 0, 1.0);
N_put_array_2d_d_value(relax, 0, 1, 1.0);
N_put_array_2d_d_value(relax, 0, 2, 1.0);
N_put_array_2d_d_value(relax, 1, 0, 1.0);
N_put_array_2d_d_value(relax, 1, 1, 1.0);
N_put_array_2d_d_value(relax, 1, 2, 1.0);
N_put_array_2d_d_value(relax, 2, 0, 1.0);
N_put_array_2d_d_value(relax, 2, 1, 1.0);
N_put_array_2d_d_value(relax, 2, 2, 1.0);
/**
* 1 2 6 5
* 3 7 10 == -4 -3
* 8 15 25 8
* */
N_put_array_2d_d_value(pot, 0, 0, 1.0);
N_put_array_2d_d_value(pot, 1, 0, 2.0);
N_put_array_2d_d_value(pot, 2, 0, 6.0);
N_put_array_2d_d_value(pot, 0, 1, 3.0);
N_put_array_2d_d_value(pot, 1, 1, 7.0);
N_put_array_2d_d_value(pot, 2, 1, 10.0);
N_put_array_2d_d_value(pot, 0, 2, 8.0);
N_put_array_2d_d_value(pot, 1, 2, 15.0);
N_put_array_2d_d_value(pot, 2, 2, 25.0);
geom->rows = 3;
geom->cols = 3;
field = N_compute_gradient_field_2d(pot, relax, relax, geom, NULL);
field = N_compute_gradient_field_2d(pot, relax, relax, geom, field);
N_print_gradient_field_2d_info(field);
/*common gradient calculation */
grad = N_get_gradient_2d(field, NULL, 0, 0);
G_message("Gradient 2d: pos 0,0 NC %g == 0 ; SC %g == 2 ; WC %g == 0 ; EC "
"%g == -1\n",
grad->NC, grad->SC, grad->WC, grad->EC);
grad = N_get_gradient_2d(field, grad, 1, 0);
G_message("Gradient 2d: pos 1,0 NC %g == 0 ; SC %g == 5 ; WC %g == -1 ; EC "
"%g == -4\n",
grad->NC, grad->SC, grad->WC, grad->EC);
N_free_gradient_2d(grad);
grad = N_get_gradient_2d(field, NULL, 1, 1);
G_message("Gradient 2d: pos 1,1 NC %g == 5 ; SC %g == 8 ; WC %g == -4 ; EC "
"%g == -3\n",
grad->NC, grad->SC, grad->WC, grad->EC);
grad = N_get_gradient_2d(field, grad, 1, 2);
G_message("Gradient 2d: pos 1,2 NC %g == 8 ; SC %g == 0 ; WC %g == -7 ; "
"EC %g == -10\n",
grad->NC, grad->SC, grad->WC, grad->EC);
N_free_gradient_2d(grad);
grad = N_get_gradient_2d(field, NULL, 2, 2);
G_message("Gradient 2d: pos 2,2 NC %g ==15 ; SC %g == 0 ; WC %g == -10 ; "
"EC %g == 0\n",
grad->NC, grad->SC, grad->WC, grad->EC);
N_free_gradient_2d(grad);
N_compute_gradient_field_components_2d(field, xcomp, ycomp);
/*gradient neighbour calculation */
grad_2d = N_get_gradient_neighbours_2d(field, NULL, 1, 1);
grad_2d = N_get_gradient_neighbours_2d(field, grad_2d, 1, 1);
G_message("N_gradient_neighbours_x; pos 1,1 NWN %g NEN %g WC %g EC %g SWS "
"%g SES %g\n",
grad_2d->x->NWN, grad_2d->x->NEN, grad_2d->x->WC, grad_2d->x->EC,
grad_2d->x->SWS, grad_2d->x->SES);
G_message("N_gradient_neighbours_y: pos 1,1 NWW %g NEE %g NC %g SC %g SWW "
"%g SEE %g\n",
grad_2d->y->NWW, grad_2d->y->NEE, grad_2d->y->NC, grad_2d->y->SC,
grad_2d->y->SWW, grad_2d->y->SEE);
N_free_gradient_neighbours_2d(grad_2d);
/*
N_print_array_2d(xcomp);
N_print_array_2d(ycomp);
*/
N_free_gradient_field_2d(field);
G_free(geom);
N_free_array_2d(xcomp);
N_free_array_2d(ycomp);
N_free_array_2d(relax);
N_free_array_2d(pot);
return 0;
}