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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "minc2.h"
#define TESTRPT(msg, val) (error_cnt++, fprintf(stderr, \
"Error reported on line #%d, %s: %d\n", \
__LINE__, msg, val))
static int error_cnt = 0;
#define NDIMS 3
#define CX 40
#define CY 40
#define CZ 40
/* "Close enough for government work" */
#define EPSILON 1e-13
#define NEARLY_EQUAL(x, y) (fabs(x - y) < EPSILON)
#define VALID_MAX 100
#define VALID_MIN 0
#define REAL_MIN -2.0
#define REAL_MAX 2.0
int
main(int argc, char **argv)
{
int result;
double voxel[NDIMS];
double world[NDIMS];
double new_voxel[NDIMS];
unsigned long coords[NDIMS];
unsigned long count[NDIMS] = {1,1,1};
midimhandle_t hdims[NDIMS];
int i, j, k;
int n;
mihandle_t hvol;
double v1, v2;
double r1, r2, r3;
double cosines[3];
result = micreate_dimension("xspace", MI_DIMCLASS_SPATIAL,
MI_DIMATTR_REGULARLY_SAMPLED, CX, &hdims[0]);
result = micreate_dimension("yspace", MI_DIMCLASS_SPATIAL,
MI_DIMATTR_REGULARLY_SAMPLED, CY, &hdims[1]);
result = micreate_dimension("zspace", MI_DIMCLASS_SPATIAL,
MI_DIMATTR_REGULARLY_SAMPLED, CZ, &hdims[2]);
/* Set cosines, steps, and starts to reference values.
*/
cosines[0] = 0.999815712665963;
cosines[1] = 0.019197414051189;
cosines[2] = 0;
miset_dimension_cosines(hdims[0], cosines);
miset_dimension_start(hdims[0], -75.4957607345912);
miset_dimension_separation(hdims[0], 1.0);
cosines[0] = -0.019197414051189;
cosines[1] = 0.999815712665963;
cosines[2] = 0;
miset_dimension_cosines(hdims[1], cosines);
miset_dimension_start(hdims[1], 160.392861750822);
miset_dimension_separation(hdims[1], -1.0);
cosines[0] = 0;
cosines[1] = 0;
cosines[2] = 1;
miset_dimension_cosines(hdims[2], cosines);
miset_dimension_start(hdims[2], 121.91304);
miset_dimension_separation(hdims[2], -1.0);
result = micreate_volume("tst-convert.mnc", NDIMS, hdims, MI_TYPE_UINT,
MI_CLASS_REAL, NULL, &hvol);
if (result < 0) {
TESTRPT("micreate_volume error", result);
}
result = micreate_volume_image(hvol);
if (result < 0) {
TESTRPT("micreate_volume_image error", result);
}
/* Valid values are from 0 to 100 */
miset_volume_valid_range(hvol, VALID_MAX, VALID_MIN);
/* "real" values are -2.0 to 2.0 */
miset_volume_range(hvol, REAL_MAX, REAL_MIN);
for (i = 0; i < CX; i++) {
for (j = 0; j < CY; j++) {
for (k = 0; k < CZ; k++) {
coords[0] = i;
coords[1] = j;
coords[2] = k;
voxel[0] = coords[0];
voxel[1] = coords[1];
voxel[2] = coords[2];
miconvert_voxel_to_world(hvol, voxel, world);
miconvert_world_to_voxel(hvol, world, new_voxel);
for (n = 0; n < 3; n++) {
if (!NEARLY_EQUAL(voxel[n], new_voxel[n])) {
fprintf(stderr, "%d %f %f\n",
n, voxel[n], new_voxel[n]);
TESTRPT("conversion error", 0);
}
}
v1 = (VALID_MAX * (voxel[0] + voxel[1] + voxel[2])
/ ((CX-1)+(CY-1)+(CZ-1)));
result = miset_voxel_value_hyperslab(hvol, MI_TYPE_DOUBLE,
coords, count, &v1);
if (result < 0) {
TESTRPT("miset_voxel_value_hyperslab error", result);
}
/* Get a voxel value.
*/
result = miget_voxel_value_hyperslab(hvol, MI_TYPE_DOUBLE,
coords, count, &v1);
if (result < 0) {
TESTRPT("miget_voxel_value_hyperslab error", result);
}
/* Convert from voxel to real.
*/
result = miconvert_voxel_to_real(hvol, coords, 3, v1, &r1);
if (result < 0) {
TESTRPT("miconvert_voxel_to_real error", result);
}
/* Double check the conversion.
*/
r3 = (v1 - VALID_MIN) / (VALID_MAX - VALID_MIN);
r3 = (r3 * (REAL_MAX - REAL_MIN)) + REAL_MIN;
if (!NEARLY_EQUAL(r3, r1)) {
TESTRPT("real value mismatch", 0);
}
/* Convert it back to voxel.
*/
result = miconvert_real_to_voxel(hvol, coords, 3, r1, &v2);
if (result < 0) {
TESTRPT("miconvert_real_to_voxel error", result);
}
/* Compare to the value read via the ICV
*/
result = miget_real_value(hvol, coords, 3, &r2);
if (result < 0) {
TESTRPT("miget_real_value error", result);
}
if (!NEARLY_EQUAL(v1, v2)) {
fprintf(stderr, "v1 %f v2 %f\n", v1, v2);
TESTRPT("Voxel value mismatch", 0);
}
if (!NEARLY_EQUAL(r1, r2)) {
fprintf(stderr, "r1 %f r2 %f\n", r1, r2);
TESTRPT("Real value mismatch", 0);
}
result = miget_voxel_value(hvol, coords, 3, &v1);
if (result < 0) {
TESTRPT("miget_voxel_value error", result);
}
if (!NEARLY_EQUAL(v1, v2)) {
fprintf(stderr, "v1 %f v2 %f\n", v1, v2);
TESTRPT("Voxel value mismatch", 0);
}
}
}
}
world[MI2_X] = -80;
world[MI2_Y] = 150;
world[MI2_Z] = 120;
result = miset_world_origin(hvol, world);
if (result != MI_NOERROR) {
TESTRPT("miset_world_origin error", result);
}
voxel[MI2_X] = voxel[MI2_Y] = voxel[MI2_Z] = 0;
result = miconvert_voxel_to_world(hvol, voxel, world);
if (result != MI_NOERROR) {
TESTRPT("miconvert_voxel_to_world error", result);
}
if (!NEARLY_EQUAL(world[MI2_X], -80.0) ||
!NEARLY_EQUAL(world[MI2_Y], 150.0) ||
!NEARLY_EQUAL(world[MI2_Z], 120.0)) {
fprintf(stderr, "%f %f %f\n", world[0], world[1], world[2]);
TESTRPT("conversion error", 0);
}
if (error_cnt == 0) {
printf("No errors\n");
}
else {
printf("%d error%s\n", error_cnt, error_cnt == 1 ? "" : "s");
}
return (error_cnt);
}
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