| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: data.c,v 2.1 2024/08/02 18:47:25 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* data.c - routines dealing with interpolated data. |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "copyright.h" |
| 9 |
|
| 10 |
#include <time.h> |
| 11 |
|
| 12 |
#include "platform.h" |
| 13 |
#include "paths.h" |
| 14 |
#include "standard.h" |
| 15 |
#include "color.h" |
| 16 |
#include "view.h" |
| 17 |
#include "data.h" |
| 18 |
|
| 19 |
/* picture memory usage before warning */ |
| 20 |
#ifndef PSIZWARN |
| 21 |
#ifdef SMLMEM |
| 22 |
#define PSIZWARN 3000000 |
| 23 |
#else |
| 24 |
#define PSIZWARN 50000000 |
| 25 |
#endif |
| 26 |
#endif |
| 27 |
|
| 28 |
#ifndef TABSIZ |
| 29 |
#define TABSIZ 997 /* table size (prime) */ |
| 30 |
#endif |
| 31 |
|
| 32 |
#define hash(s) (shash(s)%TABSIZ) |
| 33 |
|
| 34 |
|
| 35 |
static DATARRAY *dtab[TABSIZ]; /* data array list */ |
| 36 |
|
| 37 |
static gethfunc headaspect; |
| 38 |
|
| 39 |
|
| 40 |
DATARRAY * |
| 41 |
getdata( /* get data array dname */ |
| 42 |
char *dname |
| 43 |
) |
| 44 |
{ |
| 45 |
char *dfname; |
| 46 |
FILE *fp; |
| 47 |
int asize=0; |
| 48 |
int i, j; |
| 49 |
DATARRAY *dp; |
| 50 |
/* look for array in list */ |
| 51 |
for (dp = dtab[hash(dname)]; dp != NULL; dp = dp->next) |
| 52 |
if (!strcmp(dname, dp->name)) |
| 53 |
return(dp); /* found! */ |
| 54 |
/* |
| 55 |
* If we haven't loaded the data already, we will look |
| 56 |
* for it in the directories specified by the library path. |
| 57 |
* |
| 58 |
* The file has the following format: |
| 59 |
* |
| 60 |
* N |
| 61 |
* beg0 end0 n0 |
| 62 |
* beg1 end1 n1 |
| 63 |
* . . . |
| 64 |
* begN endN nN |
| 65 |
* data, later dimensions changing faster |
| 66 |
* . . . |
| 67 |
* |
| 68 |
* For irregularly spaced points, the following can be |
| 69 |
* substituted for begi endi ni: |
| 70 |
* |
| 71 |
* 0 0 ni p0i p1i .. pni |
| 72 |
*/ |
| 73 |
|
| 74 |
if ((dfname = getpath(dname, getrlibpath(), R_OK)) == NULL) { |
| 75 |
sprintf(errmsg, "cannot find data file \"%s\"", dname); |
| 76 |
error(SYSTEM, errmsg); |
| 77 |
} |
| 78 |
if ((fp = fopen(dfname, "r")) == NULL) { |
| 79 |
sprintf(errmsg, "cannot open data file \"%s\"", dfname); |
| 80 |
error(SYSTEM, errmsg); |
| 81 |
} |
| 82 |
/* get dimensions */ |
| 83 |
if (fgetval(fp, 'i', &asize) <= 0) |
| 84 |
goto scanerr; |
| 85 |
if ((asize <= 0) | (asize > MAXDDIM)) { |
| 86 |
sprintf(errmsg, "bad number of dimensions for \"%s\"", dname); |
| 87 |
error(USER, errmsg); |
| 88 |
} |
| 89 |
if ((dp = (DATARRAY *)malloc(sizeof(DATARRAY))) == NULL) |
| 90 |
goto memerr; |
| 91 |
dp->name = savestr(dname); |
| 92 |
dp->type = DATATY; |
| 93 |
dp->nd = asize; |
| 94 |
asize = 1; |
| 95 |
for (i = 0; i < dp->nd; i++) { |
| 96 |
if (fgetval(fp, DATATY, &dp->dim[i].org) <= 0) |
| 97 |
goto scanerr; |
| 98 |
if (fgetval(fp, DATATY, &dp->dim[i].siz) <= 0) |
| 99 |
goto scanerr; |
| 100 |
if (fgetval(fp, 'i', &dp->dim[i].ne) <= 0) |
| 101 |
goto scanerr; |
| 102 |
if (dp->dim[i].ne < 2) |
| 103 |
goto scanerr; |
| 104 |
asize *= dp->dim[i].ne; |
| 105 |
if ((dp->dim[i].siz -= dp->dim[i].org) == 0) { |
| 106 |
dp->dim[i].p = (DATATYPE *) |
| 107 |
malloc(dp->dim[i].ne*sizeof(DATATYPE)); |
| 108 |
if (dp->dim[i].p == NULL) |
| 109 |
goto memerr; |
| 110 |
for (j = 0; j < dp->dim[i].ne; j++) |
| 111 |
if (fgetval(fp, DATATY, &dp->dim[i].p[j]) <= 0) |
| 112 |
goto scanerr; |
| 113 |
for (j = 1; j < dp->dim[i].ne-1; j++) |
| 114 |
if ((dp->dim[i].p[j-1] < dp->dim[i].p[j]) != |
| 115 |
(dp->dim[i].p[j] < dp->dim[i].p[j+1])) |
| 116 |
goto scanerr; |
| 117 |
dp->dim[i].org = dp->dim[i].p[0]; |
| 118 |
dp->dim[i].siz = dp->dim[i].p[dp->dim[i].ne-1] |
| 119 |
- dp->dim[i].p[0]; |
| 120 |
} else |
| 121 |
dp->dim[i].p = NULL; |
| 122 |
} |
| 123 |
if ((dp->arr.d = (DATATYPE *)malloc(asize*sizeof(DATATYPE))) == NULL) |
| 124 |
goto memerr; |
| 125 |
|
| 126 |
for (i = 0; i < asize; i++) |
| 127 |
if (fgetval(fp, DATATY, &dp->arr.d[i]) <= 0) |
| 128 |
goto scanerr; |
| 129 |
fclose(fp); |
| 130 |
i = hash(dname); |
| 131 |
dp->next = dtab[i]; |
| 132 |
return(dtab[i] = dp); |
| 133 |
memerr: |
| 134 |
error(SYSTEM, "out of memory in getdata"); |
| 135 |
scanerr: |
| 136 |
sprintf(errmsg, "%s in data file \"%s\"", |
| 137 |
feof(fp) ? "unexpected EOF" : "bad format", dfname); |
| 138 |
error(USER, errmsg); |
| 139 |
return NULL; /* pro forma return */ |
| 140 |
} |
| 141 |
|
| 142 |
|
| 143 |
static int |
| 144 |
headaspect( /* check string for aspect ratio */ |
| 145 |
char *s, |
| 146 |
void *iap |
| 147 |
) |
| 148 |
{ |
| 149 |
char fmt[MAXFMTLEN]; |
| 150 |
|
| 151 |
if (isaspect(s)) |
| 152 |
*(double*)iap *= aspectval(s); |
| 153 |
else if (formatval(fmt, s) && strcmp(fmt, COLRFMT)) |
| 154 |
*(double*)iap = 0.0; |
| 155 |
return(0); |
| 156 |
} |
| 157 |
|
| 158 |
DATARRAY * |
| 159 |
getpict( /* get picture pname */ |
| 160 |
char *pname |
| 161 |
) |
| 162 |
{ |
| 163 |
double inpaspect; |
| 164 |
char *pfname; |
| 165 |
FILE *fp; |
| 166 |
COLR *scanin; |
| 167 |
int sl, ns; |
| 168 |
RESOLU inpres; |
| 169 |
RREAL loc[2]; |
| 170 |
int y; |
| 171 |
int x, i; |
| 172 |
DATARRAY *pp; |
| 173 |
/* look for array in list */ |
| 174 |
for (pp = dtab[hash(pname)]; pp != NULL; pp = pp->next) |
| 175 |
if (!strcmp(pname, pp->name)) |
| 176 |
return(pp); /* found! */ |
| 177 |
|
| 178 |
if ((pfname = getpath(pname, getrlibpath(), R_OK)) == NULL) { |
| 179 |
sprintf(errmsg, "cannot find picture file \"%s\"", pname); |
| 180 |
error(SYSTEM, errmsg); |
| 181 |
} |
| 182 |
if ((pp = (DATARRAY *)malloc(3*sizeof(DATARRAY))) == NULL) |
| 183 |
goto memerr; |
| 184 |
|
| 185 |
pp[0].name = savestr(pname); |
| 186 |
|
| 187 |
if ((fp = fopen(pfname, "rb")) == NULL) { |
| 188 |
sprintf(errmsg, "cannot open picture file \"%s\"", pfname); |
| 189 |
error(SYSTEM, errmsg); |
| 190 |
} |
| 191 |
/* get dimensions */ |
| 192 |
inpaspect = 1.0; |
| 193 |
getheader(fp, headaspect, &inpaspect); |
| 194 |
if (inpaspect <= FTINY || !fgetsresolu(&inpres, fp)) |
| 195 |
goto readerr; |
| 196 |
pp[0].nd = 2; |
| 197 |
pp[0].dim[0].ne = inpres.yr; |
| 198 |
pp[0].dim[1].ne = inpres.xr; |
| 199 |
pp[0].dim[0].org = |
| 200 |
pp[0].dim[1].org = 0.0; |
| 201 |
if (inpres.xr <= inpres.yr*inpaspect) { |
| 202 |
pp[0].dim[0].siz = inpaspect * |
| 203 |
(double)inpres.yr/inpres.xr; |
| 204 |
pp[0].dim[1].siz = 1.0; |
| 205 |
} else { |
| 206 |
pp[0].dim[0].siz = 1.0; |
| 207 |
pp[0].dim[1].siz = (double)inpres.xr/inpres.yr / |
| 208 |
inpaspect; |
| 209 |
} |
| 210 |
pp[0].dim[0].p = pp[0].dim[1].p = NULL; |
| 211 |
sl = scanlen(&inpres); /* allocate array */ |
| 212 |
ns = numscans(&inpres); |
| 213 |
i = ns*sl*sizeof(COLR); |
| 214 |
#if PSIZWARN |
| 215 |
if (i > PSIZWARN) { /* memory warning */ |
| 216 |
sprintf(errmsg, "picture file \"%s\" using %.1f MB of memory", |
| 217 |
pname, i*(1.0/(1024*1024))); |
| 218 |
error(WARNING, errmsg); |
| 219 |
} |
| 220 |
#endif |
| 221 |
if ((pp[0].arr.c = (COLR *)malloc(i)) == NULL) |
| 222 |
goto memerr; |
| 223 |
/* load picture */ |
| 224 |
if ((scanin = (COLR *)malloc(sl*sizeof(COLR))) == NULL) |
| 225 |
goto memerr; |
| 226 |
for (y = 0; y < ns; y++) { |
| 227 |
if (freadcolrs(scanin, sl, fp) < 0) |
| 228 |
goto readerr; |
| 229 |
for (x = 0; x < sl; x++) { |
| 230 |
pix2loc(loc, &inpres, x, y); |
| 231 |
i = (int)(loc[1]*inpres.yr)*inpres.xr + |
| 232 |
(int)(loc[0]*inpres.xr); |
| 233 |
copycolr(pp[0].arr.c[i], scanin[x]); |
| 234 |
} |
| 235 |
} |
| 236 |
free(scanin); |
| 237 |
fclose(fp); |
| 238 |
i = hash(pname); |
| 239 |
pp[0].next = dtab[i]; /* link into picture list */ |
| 240 |
pp[1] = pp[0]; |
| 241 |
pp[2] = pp[0]; |
| 242 |
pp[0].type = RED; /* differentiate RGB records */ |
| 243 |
pp[1].type = GRN; |
| 244 |
pp[2].type = BLU; |
| 245 |
return(dtab[i] = pp); |
| 246 |
memerr: |
| 247 |
error(SYSTEM, "out of memory in getpict"); |
| 248 |
readerr: |
| 249 |
sprintf(errmsg, "bad picture file \"%s\"", pfname); |
| 250 |
error(USER, errmsg); |
| 251 |
return NULL; /* pro forma return */ |
| 252 |
} |
| 253 |
|
| 254 |
|
| 255 |
/* header info type for hyperspectral image */ |
| 256 |
typedef struct { |
| 257 |
float wlpart[4]; /* wavelength partitions */ |
| 258 |
int nc; /* number of components */ |
| 259 |
double inpaspect; /* pixel aspect ratio */ |
| 260 |
} SPECINFO; |
| 261 |
|
| 262 |
static int |
| 263 |
specheadline( /* get info for spectral image */ |
| 264 |
char *s, |
| 265 |
void *cdp |
| 266 |
) |
| 267 |
{ |
| 268 |
SPECINFO *sip = (SPECINFO *)cdp; |
| 269 |
char fmt[MAXFMTLEN]; |
| 270 |
|
| 271 |
if (isaspect(s)) |
| 272 |
sip->inpaspect *= aspectval(s); |
| 273 |
else if (isncomp(s)) |
| 274 |
sip->nc = ncompval(s); |
| 275 |
else if (iswlsplit(s)) |
| 276 |
wlsplitval(sip->wlpart, s); |
| 277 |
else if (formatval(fmt, s) && strcmp(fmt, SPECFMT)) |
| 278 |
return(-1); |
| 279 |
return(0); |
| 280 |
} |
| 281 |
|
| 282 |
DATARRAY * |
| 283 |
getspec( /* load hyperspectral image as data */ |
| 284 |
char *sname |
| 285 |
) |
| 286 |
{ |
| 287 |
SPECINFO si; |
| 288 |
char *pfname; |
| 289 |
FILE *fp; |
| 290 |
int sl, ns; |
| 291 |
int y, i; |
| 292 |
DATARRAY *pp; |
| 293 |
/* look for array in list */ |
| 294 |
for (pp = dtab[hash(sname)]; pp != NULL; pp = pp->next) |
| 295 |
if (!strcmp(sname, pp->name)) |
| 296 |
return(pp); /* found! */ |
| 297 |
|
| 298 |
if ((pfname = getpath(sname, getrlibpath(), R_OK)) == NULL) { |
| 299 |
sprintf(errmsg, "cannot find hyperspectral image \"%s\"", sname); |
| 300 |
error(SYSTEM, errmsg); |
| 301 |
} |
| 302 |
if ((fp = fopen(pfname, "rb")) == NULL) { |
| 303 |
sprintf(errmsg, "cannot open hyperspectral image \"%s\"", pfname); |
| 304 |
error(SYSTEM, errmsg); |
| 305 |
} |
| 306 |
si.wlpart[3] = 0; |
| 307 |
si.nc = 0; |
| 308 |
si.inpaspect = 1.0; |
| 309 |
if (getheader(fp, specheadline, &si) < 0 || |
| 310 |
(si.nc <= 3) | (si.nc > MAXCSAMP) | (si.wlpart[3] < 1) || |
| 311 |
!fscnresolu(&sl, &ns, fp)) |
| 312 |
goto readerr; |
| 313 |
|
| 314 |
if ((pp = (DATARRAY *)malloc(sizeof(DATARRAY))) == NULL) |
| 315 |
goto memerr; |
| 316 |
|
| 317 |
pp->name = savestr(sname); |
| 318 |
pp->type = SPECTY; |
| 319 |
pp->nd = 3; |
| 320 |
pp->dim[0].ne = ns; |
| 321 |
pp->dim[1].ne = sl; |
| 322 |
pp->dim[0].org = |
| 323 |
pp->dim[1].org = 0.0; |
| 324 |
if (sl <= ns*si.inpaspect) { |
| 325 |
pp->dim[0].siz = si.inpaspect * (double)ns/sl; |
| 326 |
pp->dim[1].siz = 1.0; |
| 327 |
} else { |
| 328 |
pp->dim[0].siz = 1.0; |
| 329 |
pp->dim[1].siz = (double)sl/ns / si.inpaspect; |
| 330 |
} |
| 331 |
pp->dim[2].ne = si.nc; |
| 332 |
pp->dim[2].siz = si.wlpart[3] - si.wlpart[0]; |
| 333 |
pp->dim[2].org = si.wlpart[0] + 0.5*pp->dim[2].siz/si.nc; |
| 334 |
pp->dim[2].siz *= (si.nc - 1.0)/si.nc; |
| 335 |
pp->dim[0].p = pp->dim[1].p = pp->dim[2].p = NULL; |
| 336 |
i = ns*sl*(si.nc+1); |
| 337 |
#if PSIZWARN |
| 338 |
if (i > PSIZWARN) { /* memory warning */ |
| 339 |
sprintf(errmsg, "hyperspectral image \"%s\" using %.1f MB of memory", |
| 340 |
sname, i*(1.0/(1024*1024))); |
| 341 |
error(WARNING, errmsg); |
| 342 |
} |
| 343 |
#endif |
| 344 |
if ((pp->arr.s = (uby8 *)malloc(i)) == NULL) |
| 345 |
goto memerr; |
| 346 |
for (y = ns; y-- > 0; ) /* read each scanline */ |
| 347 |
if (freadscolrs(pp->arr.s + y*sl*(si.nc+1), si.nc, sl, fp) < 0) |
| 348 |
goto readerr; |
| 349 |
fclose(fp); |
| 350 |
i = hash(sname); /* insert in hash table */ |
| 351 |
pp->next = dtab[i]; |
| 352 |
return(dtab[i] = pp); |
| 353 |
memerr: |
| 354 |
error(SYSTEM, "out of memory in getspec"); |
| 355 |
readerr: |
| 356 |
sprintf(errmsg, "bad hyperspectral image \"%s\"", pfname); |
| 357 |
error(USER, errmsg); |
| 358 |
return NULL; /* pro forma return */ |
| 359 |
} |
| 360 |
|
| 361 |
|
| 362 |
void |
| 363 |
freedata( /* release data array reference */ |
| 364 |
DATARRAY *dta |
| 365 |
) |
| 366 |
{ |
| 367 |
DATARRAY head; |
| 368 |
int hval, nents; |
| 369 |
DATARRAY *dpl, *dp; |
| 370 |
int i; |
| 371 |
|
| 372 |
if (dta == NULL) { /* free all if NULL */ |
| 373 |
hval = 0; nents = TABSIZ; |
| 374 |
} else { |
| 375 |
if (dta->next == dta) { |
| 376 |
free(dta); /* unlisted temp array */ |
| 377 |
return; |
| 378 |
} |
| 379 |
hval = hash(dta->name); nents = 1; |
| 380 |
if (!*dta->name) { /* not a data file? */ |
| 381 |
dta->next = dtab[hval]; |
| 382 |
dtab[hval] = dta; /* ...fake position */ |
| 383 |
} |
| 384 |
} |
| 385 |
while (nents--) { |
| 386 |
head.next = dtab[hval]; |
| 387 |
dpl = &head; |
| 388 |
while ((dp = dpl->next) != NULL) |
| 389 |
if ((dta == NULL) | (dta == dp)) { |
| 390 |
dpl->next = dp->next; |
| 391 |
free(dp->arr.p); |
| 392 |
for (i = 0; i < dp->nd; i++) |
| 393 |
if (dp->dim[i].p != NULL) |
| 394 |
free(dp->dim[i].p); |
| 395 |
freestr(dp->name); |
| 396 |
free(dp); |
| 397 |
} else |
| 398 |
dpl = dp; |
| 399 |
dtab[hval++] = head.next; |
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
|
| 404 |
/* internal call to interpolate data value or vector */ |
| 405 |
static double |
| 406 |
data_interp(DATARRAY *dp, double *pt, double coef, DATATYPE *rvec) |
| 407 |
{ |
| 408 |
DATARRAY sd; |
| 409 |
int stride, i; |
| 410 |
double x, c0, c1, y0, y1; |
| 411 |
/* unlikely, but may as well check */ |
| 412 |
if ((-FTINY <= coef) & (coef <= FTINY)) |
| 413 |
return(0.); |
| 414 |
/* set up dimensions for recursion */ |
| 415 |
if (dp->nd > 1) { |
| 416 |
sd.name = dp->name; |
| 417 |
sd.type = dp->type; |
| 418 |
sd.nd = dp->nd - 1; |
| 419 |
memcpy(sd.dim, dp->dim+1, sd.nd*sizeof(struct dadim)); |
| 420 |
stride = sd.dim[i = sd.nd-1].ne + (sd.type==SPECTY); |
| 421 |
while (i-- > 0) |
| 422 |
stride *= sd.dim[i].ne; |
| 423 |
} |
| 424 |
/* get independent variable */ |
| 425 |
if (dp->dim[0].p == NULL) { /* evenly spaced points */ |
| 426 |
x = (pt[0] - dp->dim[0].org)/dp->dim[0].siz; |
| 427 |
x *= (double)(dp->dim[0].ne - 1); |
| 428 |
i = x; |
| 429 |
if (i < 0) |
| 430 |
i = 0; |
| 431 |
else if (i > dp->dim[0].ne - 2) |
| 432 |
i = dp->dim[0].ne - 2; |
| 433 |
} else { /* unevenly spaced points */ |
| 434 |
int lower, upper; |
| 435 |
if (dp->dim[0].siz > 0.) { |
| 436 |
lower = 0; |
| 437 |
upper = dp->dim[0].ne; |
| 438 |
} else { |
| 439 |
lower = dp->dim[0].ne; |
| 440 |
upper = 0; |
| 441 |
} |
| 442 |
do { |
| 443 |
i = (lower + upper) >> 1; |
| 444 |
if (pt[0] >= dp->dim[0].p[i]) |
| 445 |
lower = i; |
| 446 |
else |
| 447 |
upper = i; |
| 448 |
} while (i != (lower + upper) >> 1); |
| 449 |
|
| 450 |
if (i > dp->dim[0].ne - 2) |
| 451 |
i = dp->dim[0].ne - 2; |
| 452 |
|
| 453 |
x = i + (pt[0] - dp->dim[0].p[i]) / |
| 454 |
(dp->dim[0].p[i+1] - dp->dim[0].p[i]); |
| 455 |
} |
| 456 |
/* |
| 457 |
* Compute interpolation coefficients: |
| 458 |
* extrapolate as far as one division, then |
| 459 |
* taper off harmonically to zero. |
| 460 |
*/ |
| 461 |
if (x > i+2) { |
| 462 |
c0 = 1./(i-1 - x); |
| 463 |
c1 = -2.*c0; |
| 464 |
} else if (x < i-1) { |
| 465 |
c1 = 1./(i - x); |
| 466 |
c0 = -2.*c1; |
| 467 |
} else { |
| 468 |
c0 = i+1 - x; |
| 469 |
c1 = x - i; |
| 470 |
} |
| 471 |
c0 *= coef; |
| 472 |
c1 *= coef; |
| 473 |
/* check if vector interp */ |
| 474 |
if ((dp->nd == 2) & (rvec != NULL)) { |
| 475 |
if (dp->type == DATATY) { |
| 476 |
sd.arr.d = dp->arr.d + i*stride; |
| 477 |
for (i = sd.dim[0].ne; i--; ) |
| 478 |
rvec[i] += c0*sd.arr.d[i] |
| 479 |
+ c1*sd.arr.d[i+stride]; |
| 480 |
} else if (dp->type == SPECTY) { |
| 481 |
double f; |
| 482 |
sd.arr.s = dp->arr.s + i*stride; |
| 483 |
if ((sd.arr.s[sd.dim[0].ne] > 0) & ((-FTINY>c0)|(c0>FTINY))) { |
| 484 |
f = ldexp(c0, (int)sd.arr.s[sd.dim[0].ne]-(COLXS+8)); |
| 485 |
for (i = sd.dim[0].ne; i--; ) |
| 486 |
rvec[i] += f*(sd.arr.s[i] + .5); |
| 487 |
} |
| 488 |
sd.arr.s += stride; |
| 489 |
if ((sd.arr.s[sd.dim[0].ne] > 0) & ((-FTINY>c1)|(c1>FTINY))) { |
| 490 |
f = ldexp(c1, (int)sd.arr.s[sd.dim[0].ne]-(COLXS+8)); |
| 491 |
for (i = sd.dim[0].ne; i--; ) |
| 492 |
rvec[i] += f*(sd.arr.s[i] + .5); |
| 493 |
} |
| 494 |
} else { |
| 495 |
sd.arr.c = dp->arr.c + i*stride; |
| 496 |
for (i = sd.dim[0].ne; i--; ) |
| 497 |
rvec[i] += c0*colrval(sd.arr.c[i],sd.type) |
| 498 |
+ c1*colrval(sd.arr.c[i+stride],sd.type); |
| 499 |
} |
| 500 |
return(0.); /* return value ignored */ |
| 501 |
} |
| 502 |
/* get dependent variable */ |
| 503 |
if (dp->nd > 1) { |
| 504 |
if (dp->type == DATATY) { |
| 505 |
sd.arr.d = dp->arr.d + i*stride; |
| 506 |
y0 = data_interp(&sd, pt+1, c0, rvec); |
| 507 |
sd.arr.d += stride; |
| 508 |
} else if (dp->type == SPECTY) { |
| 509 |
sd.arr.s = dp->arr.s + i*stride; |
| 510 |
y0 = data_interp(&sd, pt+1, c0, rvec); |
| 511 |
sd.arr.s += stride; |
| 512 |
} else { |
| 513 |
sd.arr.c = dp->arr.c + i*stride; |
| 514 |
y0 = data_interp(&sd, pt+1, c0, rvec); |
| 515 |
sd.arr.c += stride; |
| 516 |
} |
| 517 |
y1 = data_interp(&sd, pt+1, c1, rvec); |
| 518 |
} else { /* end of recursion */ |
| 519 |
if (dp->type == DATATY) { |
| 520 |
y0 = dp->arr.d[i]; |
| 521 |
y1 = dp->arr.d[i+1]; |
| 522 |
} else if (dp->type == SPECTY) { |
| 523 |
if (dp->arr.s[dp->dim[0].ne]) { |
| 524 |
double f = dp->arr.s[dp->dim[0].ne] |
| 525 |
? ldexp(1., -(COLXS+8) + |
| 526 |
(int)dp->arr.s[dp->dim[0].ne]) |
| 527 |
: 0.; |
| 528 |
y0 = f*(dp->arr.s[i] + 0.5); |
| 529 |
y1 = f*(dp->arr.s[i+1] + 0.5); |
| 530 |
} else |
| 531 |
y0 = y1 = 0.; |
| 532 |
} else { |
| 533 |
y0 = colrval(dp->arr.c[i],dp->type); |
| 534 |
y1 = colrval(dp->arr.c[i+1],dp->type); |
| 535 |
} |
| 536 |
y0 *= c0; |
| 537 |
y1 *= c1; |
| 538 |
} |
| 539 |
return(y0 + y1); /* coefficients already applied */ |
| 540 |
} |
| 541 |
|
| 542 |
|
| 543 |
double |
| 544 |
datavalue( /* interpolate data value at a point */ |
| 545 |
DATARRAY *dp, |
| 546 |
double *pt |
| 547 |
) |
| 548 |
{ |
| 549 |
return(data_interp(dp, pt, 1., NULL)); |
| 550 |
} |
| 551 |
|
| 552 |
|
| 553 |
/* Interpolate final vector corresponding to last dimension in data array */ |
| 554 |
DATARRAY * |
| 555 |
datavector(DATARRAY *dp, double *pt) |
| 556 |
{ |
| 557 |
DATARRAY *newdp; |
| 558 |
|
| 559 |
if (dp->nd < 2) |
| 560 |
error(INTERNAL, "datavector() called with 1-D array"); |
| 561 |
/* create vector array */ |
| 562 |
newdp = (DATARRAY *)malloc(sizeof(DATARRAY) - |
| 563 |
(MAXDDIM-1)*sizeof(struct dadim) + |
| 564 |
sizeof(DATATYPE)*dp->dim[dp->nd-1].ne); |
| 565 |
if (newdp == NULL) |
| 566 |
error(SYSTEM, "out of memory in datavector"); |
| 567 |
newdp->next = newdp; /* flags us as temp vector */ |
| 568 |
newdp->name = dp->name; |
| 569 |
newdp->type = DATATY; |
| 570 |
newdp->nd = 1; /* vector data goes here */ |
| 571 |
newdp->dim[0] = dp->dim[dp->nd-1]; |
| 572 |
newdp->arr.d = (DATATYPE *)(newdp->dim + 1); |
| 573 |
memset(newdp->arr.d, 0, sizeof(DATATYPE)*newdp->dim[0].ne); |
| 574 |
|
| 575 |
(void)data_interp(dp, pt, 1., newdp->arr.d); |
| 576 |
|
| 577 |
return(newdp); /* will be free'd using free() */ |
| 578 |
} |
