| 17 |
|
#define pscan(y) (ourpict+(y)*ourview.hresolu) |
| 18 |
|
#define zscan(y) (ourzbuf+(y)*ourview.hresolu) |
| 19 |
|
|
| 20 |
+ |
#define F_FORE 1 /* fill foreground */ |
| 21 |
+ |
#define F_BACK 2 /* fill background */ |
| 22 |
+ |
|
| 23 |
|
#define ABS(x) ((x)>0?(x):-(x)) |
| 24 |
|
|
| 25 |
|
VIEW ourview = STDVIEW(512); /* desired view */ |
| 26 |
|
|
| 27 |
< |
double zeps = 0.001; /* allowed z epsilon */ |
| 27 |
> |
double zeps = .02; /* allowed z epsilon */ |
| 28 |
|
|
| 29 |
|
COLR *ourpict; /* output picture */ |
| 30 |
|
float *ourzbuf; /* corresponding z-buffer */ |
| 34 |
|
VIEW theirview = STDVIEW(512); /* input view */ |
| 35 |
|
int gotview; /* got input view? */ |
| 36 |
|
|
| 37 |
+ |
int fill = F_FORE|F_BACK; /* selected fill algorithm */ |
| 38 |
+ |
extern int backfill(); /* fill functions */ |
| 39 |
+ |
int (*deffill)() = backfill; /* selected fill function */ |
| 40 |
+ |
COLR backcolr = BLKCOLR; /* background color */ |
| 41 |
+ |
|
| 42 |
|
double theirs2ours[4][4]; /* transformation matrix */ |
| 43 |
+ |
int normdist = 1; /* normalized distance? */ |
| 44 |
|
|
| 45 |
|
|
| 46 |
|
main(argc, argv) /* interpolate pictures */ |
| 48 |
|
char *argv[]; |
| 49 |
|
{ |
| 50 |
|
#define check(olen,narg) if (argv[i][olen] || narg >= argc-i) goto badopt |
| 51 |
+ |
extern double atof(); |
| 52 |
|
int gotvfile = 0; |
| 53 |
+ |
char *zfile = NULL; |
| 54 |
|
char *err; |
| 55 |
|
int i; |
| 56 |
|
|
| 62 |
|
check(2,1); |
| 63 |
|
zeps = atof(argv[++i]); |
| 64 |
|
break; |
| 65 |
+ |
case 'n': /* dist. normalized? */ |
| 66 |
+ |
check(2,0); |
| 67 |
+ |
normdist = !normdist; |
| 68 |
+ |
break; |
| 69 |
+ |
case 'f': /* fill type */ |
| 70 |
+ |
switch (argv[i][2]) { |
| 71 |
+ |
case '0': /* none */ |
| 72 |
+ |
check(3,0); |
| 73 |
+ |
fill = 0; |
| 74 |
+ |
break; |
| 75 |
+ |
case 'f': /* foreground */ |
| 76 |
+ |
check(3,0); |
| 77 |
+ |
fill = F_FORE; |
| 78 |
+ |
break; |
| 79 |
+ |
case 'b': /* background */ |
| 80 |
+ |
check(3,0); |
| 81 |
+ |
fill = F_BACK; |
| 82 |
+ |
break; |
| 83 |
+ |
case 'a': /* all */ |
| 84 |
+ |
check(3,0); |
| 85 |
+ |
fill = F_FORE|F_BACK; |
| 86 |
+ |
break; |
| 87 |
+ |
case 'c': /* color */ |
| 88 |
+ |
check(3,3); |
| 89 |
+ |
deffill = backfill; |
| 90 |
+ |
setcolr(backcolr, atof(argv[i+1]), |
| 91 |
+ |
atof(argv[i+2]), atof(argv[i+3])); |
| 92 |
+ |
i += 3; |
| 93 |
+ |
break; |
| 94 |
+ |
default: |
| 95 |
+ |
goto badopt; |
| 96 |
+ |
} |
| 97 |
+ |
break; |
| 98 |
+ |
case 'z': /* z file */ |
| 99 |
+ |
check(2,1); |
| 100 |
+ |
zfile = argv[++i]; |
| 101 |
+ |
break; |
| 102 |
+ |
case 'x': /* x resolution */ |
| 103 |
+ |
check(2,1); |
| 104 |
+ |
ourview.hresolu = atoi(argv[++i]); |
| 105 |
+ |
break; |
| 106 |
+ |
case 'y': /* y resolution */ |
| 107 |
+ |
check(2,1); |
| 108 |
+ |
ourview.vresolu = atoi(argv[++i]); |
| 109 |
+ |
break; |
| 110 |
|
case 'v': /* view */ |
| 111 |
|
switch (argv[i][2]) { |
| 112 |
|
case 't': /* type */ |
| 157 |
|
break; |
| 158 |
|
default: |
| 159 |
|
badopt: |
| 160 |
< |
fprintf(stderr, "%s: unknown option '%s'\n", |
| 160 |
> |
fprintf(stderr, "%s: command line error at '%s'\n", |
| 161 |
|
progname, argv[i]); |
| 162 |
< |
exit(1); |
| 162 |
> |
goto userr; |
| 163 |
|
} |
| 164 |
|
/* check arguments */ |
| 165 |
< |
if (argc-i < 2 || (argc-i)%2) { |
| 166 |
< |
fprintf(stderr, "Usage: %s [view args] pfile zfile ..\n", |
| 111 |
< |
progname); |
| 112 |
< |
exit(1); |
| 113 |
< |
} |
| 165 |
> |
if (argc-i < 2 || (argc-i)%2) |
| 166 |
> |
goto userr; |
| 167 |
|
/* set view */ |
| 168 |
|
if (err = setview(&ourview)) { |
| 169 |
|
fprintf(stderr, "%s: %s\n", progname, err); |
| 170 |
|
exit(1); |
| 171 |
|
} |
| 172 |
|
/* allocate frame */ |
| 173 |
< |
ourpict = (COLR *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR)); |
| 173 |
> |
ourpict = (COLR *)malloc(ourview.hresolu*ourview.vresolu*sizeof(COLR)); |
| 174 |
|
ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float)); |
| 175 |
|
if (ourpict == NULL || ourzbuf == NULL) { |
| 176 |
|
perror(progname); |
| 180 |
|
for ( ; i < argc; i += 2) |
| 181 |
|
addpicture(argv[i], argv[i+1]); |
| 182 |
|
/* fill in spaces */ |
| 183 |
< |
fillpicture(); |
| 183 |
> |
if (fill&F_BACK) |
| 184 |
> |
backpicture(); |
| 185 |
> |
else |
| 186 |
> |
fillpicture(); |
| 187 |
|
/* add to header */ |
| 188 |
|
printargs(argc, argv, stdout); |
| 189 |
|
if (gotvfile) { |
| 192 |
|
printf("\n"); |
| 193 |
|
} |
| 194 |
|
printf("\n"); |
| 195 |
< |
/* write output */ |
| 195 |
> |
/* write picture */ |
| 196 |
|
writepicture(); |
| 197 |
+ |
/* write z file */ |
| 198 |
+ |
if (zfile != NULL) |
| 199 |
+ |
writedistance(zfile); |
| 200 |
|
|
| 201 |
|
exit(0); |
| 202 |
+ |
userr: |
| 203 |
+ |
fprintf(stderr, |
| 204 |
+ |
"Usage: %s [view opts][-t zthresh][-z zout][-fT][-n] pfile zspec ..\n", |
| 205 |
+ |
progname); |
| 206 |
+ |
exit(1); |
| 207 |
|
#undef check |
| 208 |
|
} |
| 209 |
|
|
| 225 |
|
} |
| 226 |
|
|
| 227 |
|
|
| 228 |
< |
addpicture(pfile, zfile) /* add picture to output */ |
| 229 |
< |
char *pfile, *zfile; |
| 228 |
> |
addpicture(pfile, zspec) /* add picture to output */ |
| 229 |
> |
char *pfile, *zspec; |
| 230 |
|
{ |
| 231 |
+ |
extern double atof(); |
| 232 |
|
FILE *pfp, *zfp; |
| 168 |
– |
COLR *scanin; |
| 169 |
– |
float *zin; |
| 233 |
|
char *err; |
| 234 |
< |
int xres, yres; |
| 234 |
> |
COLR *scanin; |
| 235 |
> |
float *zin, *zlast; |
| 236 |
> |
int *plast; |
| 237 |
|
int y; |
| 238 |
< |
/* open input files */ |
| 238 |
> |
/* open picture file */ |
| 239 |
|
if ((pfp = fopen(pfile, "r")) == NULL) { |
| 240 |
|
perror(pfile); |
| 241 |
|
exit(1); |
| 242 |
|
} |
| 178 |
– |
if ((zfp = fopen(zfile, "r")) == NULL) { |
| 179 |
– |
perror(zfile); |
| 180 |
– |
exit(1); |
| 181 |
– |
} |
| 243 |
|
/* get header and view */ |
| 244 |
|
printf("%s:\n", pfile); |
| 245 |
|
gotview = 0; |
| 246 |
|
getheader(pfp, headline); |
| 247 |
< |
if (!gotview || fgetresolu(&xres, &yres, pfp) != (YMAJOR|YDECR)) { |
| 247 |
> |
if (!gotview || fgetresolu(&theirview.hresolu, &theirview.vresolu, pfp) |
| 248 |
> |
!= (YMAJOR|YDECR)) { |
| 249 |
|
fprintf(stderr, "%s: picture view error\n", pfile); |
| 250 |
|
exit(1); |
| 251 |
|
} |
| 190 |
– |
theirview.hresolu = xres; |
| 191 |
– |
theirview.vresolu = yres; |
| 252 |
|
if (err = setview(&theirview)) { |
| 253 |
|
fprintf(stderr, "%s: %s\n", pfile, err); |
| 254 |
|
exit(1); |
| 256 |
|
/* compute transformation */ |
| 257 |
|
pixform(theirs2ours, &theirview, &ourview); |
| 258 |
|
/* allocate scanlines */ |
| 259 |
< |
scanin = (COLR *)malloc(xres*sizeof(COLR)); |
| 260 |
< |
zin = (float *)malloc(xres*sizeof(float)); |
| 261 |
< |
if (scanin == NULL || zin == NULL) { |
| 259 |
> |
scanin = (COLR *)malloc(theirview.hresolu*sizeof(COLR)); |
| 260 |
> |
zin = (float *)malloc(theirview.hresolu*sizeof(float)); |
| 261 |
> |
plast = (int *)calloc(theirview.hresolu, sizeof(int)); |
| 262 |
> |
zlast = (float *)calloc(theirview.hresolu, sizeof(float)); |
| 263 |
> |
if (scanin == NULL || zin == NULL || plast == NULL || zlast == NULL) { |
| 264 |
|
perror(progname); |
| 265 |
|
exit(1); |
| 266 |
|
} |
| 267 |
+ |
/* get z specification or file */ |
| 268 |
+ |
if ((zfp = fopen(zspec, "r")) == NULL) { |
| 269 |
+ |
double zvalue; |
| 270 |
+ |
register int x; |
| 271 |
+ |
if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0) { |
| 272 |
+ |
perror(zspec); |
| 273 |
+ |
exit(1); |
| 274 |
+ |
} |
| 275 |
+ |
for (x = 0; x < theirview.hresolu; x++) |
| 276 |
+ |
zin[x] = zvalue; |
| 277 |
+ |
} |
| 278 |
|
/* load image */ |
| 279 |
< |
for (y = yres-1; y >= 0; y--) { |
| 280 |
< |
if (freadcolrs(scanin, xres, pfp) < 0) { |
| 279 |
> |
for (y = theirview.vresolu-1; y >= 0; y--) { |
| 280 |
> |
if (freadcolrs(scanin, theirview.hresolu, pfp) < 0) { |
| 281 |
|
fprintf(stderr, "%s: read error\n", pfile); |
| 282 |
|
exit(1); |
| 283 |
|
} |
| 284 |
< |
if (fread(zin, sizeof(float), xres, zfp) < xres) { |
| 285 |
< |
fprintf(stderr, "%s: read error\n", zfile); |
| 284 |
> |
if (zfp != NULL |
| 285 |
> |
&& fread(zin,sizeof(float),theirview.hresolu,zfp) |
| 286 |
> |
< theirview.hresolu) { |
| 287 |
> |
fprintf(stderr, "%s: read error\n", zspec); |
| 288 |
|
exit(1); |
| 289 |
|
} |
| 290 |
< |
addscanline(y, scanin, zin); |
| 290 |
> |
addscanline(y, scanin, zin, plast, zlast); |
| 291 |
|
} |
| 292 |
|
/* clean up */ |
| 293 |
|
free((char *)scanin); |
| 294 |
|
free((char *)zin); |
| 295 |
+ |
free((char *)plast); |
| 296 |
+ |
free((char *)zlast); |
| 297 |
|
fclose(pfp); |
| 298 |
< |
fclose(zfp); |
| 298 |
> |
if (zfp != NULL) |
| 299 |
> |
fclose(zfp); |
| 300 |
|
} |
| 301 |
|
|
| 302 |
|
|
| 336 |
|
} |
| 337 |
|
|
| 338 |
|
|
| 339 |
< |
addscanline(y, pline, zline) /* add scanline to output */ |
| 339 |
> |
addscanline(y, pline, zline, lasty, lastyz) /* add scanline to output */ |
| 340 |
|
int y; |
| 341 |
|
COLR *pline; |
| 342 |
|
float *zline; |
| 343 |
+ |
int *lasty; /* input/output */ |
| 344 |
+ |
float *lastyz; /* input/output */ |
| 345 |
|
{ |
| 346 |
|
extern double sqrt(); |
| 347 |
|
double pos[3]; |
| 348 |
+ |
int lastx = 0; |
| 349 |
+ |
double lastxz = 0; |
| 350 |
+ |
double zt; |
| 351 |
+ |
int xpos, ypos; |
| 352 |
|
register int x; |
| 269 |
– |
register int xpos, ypos; |
| 353 |
|
|
| 354 |
< |
for (x = 0; x < theirview.hresolu; x++) { |
| 354 |
> |
for (x = theirview.hresolu-1; x >= 0; x--) { |
| 355 |
|
pos[0] = x - .5*(theirview.hresolu-1); |
| 356 |
|
pos[1] = y - .5*(theirview.vresolu-1); |
| 357 |
|
pos[2] = zline[x]; |
| 358 |
|
if (theirview.type == VT_PER) { |
| 359 |
< |
pos[2] /= sqrt( 1. |
| 359 |
> |
if (normdist) /* adjust for eye-ray distance */ |
| 360 |
> |
pos[2] /= sqrt( 1. |
| 361 |
|
+ pos[0]*pos[0]*theirview.vhn2 |
| 362 |
|
+ pos[1]*pos[1]*theirview.vvn2 ); |
| 363 |
|
pos[0] *= pos[2]; |
| 364 |
|
pos[1] *= pos[2]; |
| 365 |
|
} |
| 366 |
|
multp3(pos, pos, theirs2ours); |
| 367 |
< |
if (pos[2] <= 0.0) |
| 367 |
> |
if (pos[2] <= 0) |
| 368 |
|
continue; |
| 369 |
|
if (ourview.type == VT_PER) { |
| 370 |
|
pos[0] /= pos[2]; |
| 372 |
|
} |
| 373 |
|
pos[0] += .5*ourview.hresolu; |
| 374 |
|
pos[1] += .5*ourview.vresolu; |
| 375 |
< |
if (pos[0] < 0 || pos[0] > ourview.hresolu |
| 376 |
< |
|| pos[1] < 0 || pos[1] > ourview.vresolu) |
| 375 |
> |
if (pos[0] < 0 || (xpos = pos[0]) >= ourview.hresolu |
| 376 |
> |
|| pos[1] < 0 || (ypos = pos[1]) >= ourview.vresolu) |
| 377 |
|
continue; |
| 378 |
< |
/* check current value at pos */ |
| 379 |
< |
xpos = pos[0]; |
| 380 |
< |
ypos = pos[1]; |
| 381 |
< |
if (zscan(ypos)[xpos] <= 0.0 |
| 382 |
< |
|| zscan(ypos)[xpos] - pos[2] |
| 383 |
< |
> zeps*zscan(ypos)[xpos]) { |
| 384 |
< |
zscan(ypos)[xpos] = pos[2]; |
| 385 |
< |
copycolr(pscan(ypos)[xpos], pline[x]); |
| 386 |
< |
} |
| 378 |
> |
/* add pixel to our image */ |
| 379 |
> |
zt = 2.*zeps*zline[x]; |
| 380 |
> |
addpixel(xpos, ypos, |
| 381 |
> |
(fill&F_FORE && ABS(zline[x]-lastxz) <= zt) |
| 382 |
> |
? lastx - xpos : 1, |
| 383 |
> |
(fill&F_FORE && ABS(zline[x]-lastyz[x]) <= zt) |
| 384 |
> |
? lasty[x] - ypos : 1, |
| 385 |
> |
pline[x], pos[2]); |
| 386 |
> |
lastx = xpos; |
| 387 |
> |
lasty[x] = ypos; |
| 388 |
> |
lastxz = lastyz[x] = zline[x]; |
| 389 |
|
} |
| 390 |
|
} |
| 391 |
|
|
| 392 |
|
|
| 393 |
< |
fillpicture() /* fill in empty spaces */ |
| 393 |
> |
addpixel(xstart, ystart, width, height, pix, z) /* fill in area for pixel */ |
| 394 |
> |
int xstart, ystart; |
| 395 |
> |
int width, height; |
| 396 |
> |
COLR pix; |
| 397 |
> |
double z; |
| 398 |
|
{ |
| 399 |
+ |
register int x, y; |
| 400 |
+ |
/* make width and height positive */ |
| 401 |
+ |
if (width < 0) { |
| 402 |
+ |
width = -width; |
| 403 |
+ |
xstart = xstart-width+1; |
| 404 |
+ |
} else if (width == 0) |
| 405 |
+ |
width = 1; |
| 406 |
+ |
if (height < 0) { |
| 407 |
+ |
height = -height; |
| 408 |
+ |
ystart = ystart-height+1; |
| 409 |
+ |
} else if (height == 0) |
| 410 |
+ |
height = 1; |
| 411 |
+ |
/* fill pixel(s) within rectangle */ |
| 412 |
+ |
for (y = ystart; y < ystart+height; y++) |
| 413 |
+ |
for (x = xstart; x < xstart+width; x++) |
| 414 |
+ |
if (zscan(y)[x] <= 0 |
| 415 |
+ |
|| zscan(y)[x]-z > zeps*zscan(y)[x]) { |
| 416 |
+ |
zscan(y)[x] = z; |
| 417 |
+ |
copycolr(pscan(y)[x], pix); |
| 418 |
+ |
} |
| 419 |
+ |
} |
| 420 |
+ |
|
| 421 |
+ |
|
| 422 |
+ |
backpicture() /* background fill algorithm */ |
| 423 |
+ |
{ |
| 424 |
|
int *yback, xback; |
| 425 |
|
int y; |
| 426 |
|
COLR pfill; |
| 433 |
|
} |
| 434 |
|
for (x = 0; x < ourview.hresolu; x++) |
| 435 |
|
yback[x] = -2; |
| 436 |
+ |
/* |
| 437 |
+ |
* Xback and yback are the pixel locations of suitable |
| 438 |
+ |
* background values in each direction. |
| 439 |
+ |
* A value of -2 means unassigned, and -1 means |
| 440 |
+ |
* that there is no suitable background in this direction. |
| 441 |
+ |
*/ |
| 442 |
|
/* fill image */ |
| 443 |
|
for (y = 0; y < ourview.vresolu; y++) { |
| 444 |
|
xback = -2; |
| 445 |
|
for (x = 0; x < ourview.hresolu; x++) |
| 446 |
< |
if (zscan(y)[x] <= 0.0) { /* empty pixel */ |
| 446 |
> |
if (zscan(y)[x] <= 0) { /* empty pixel */ |
| 447 |
> |
/* |
| 448 |
> |
* First, find background from above or below. |
| 449 |
> |
* (farthest assigned pixel) |
| 450 |
> |
*/ |
| 451 |
|
if (yback[x] == -2) { |
| 452 |
|
for (i = y+1; i < ourview.vresolu; i++) |
| 453 |
< |
if (zscan(i)[x] > 0.0) |
| 453 |
> |
if (zscan(i)[x] > 0) |
| 454 |
|
break; |
| 455 |
|
if (i < ourview.vresolu |
| 456 |
|
&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) |
| 458 |
|
else |
| 459 |
|
yback[x] = y-1; |
| 460 |
|
} |
| 461 |
+ |
/* |
| 462 |
+ |
* Next, find background from left or right. |
| 463 |
+ |
*/ |
| 464 |
|
if (xback == -2) { |
| 465 |
< |
for (i = x+1; x < ourview.hresolu; i++) |
| 466 |
< |
if (zscan(y)[i] > 0.0) |
| 465 |
> |
for (i = x+1; i < ourview.hresolu; i++) |
| 466 |
> |
if (zscan(y)[i] > 0) |
| 467 |
|
break; |
| 468 |
|
if (i < ourview.hresolu |
| 469 |
|
&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) |
| 471 |
|
else |
| 472 |
|
xback = x-1; |
| 473 |
|
} |
| 474 |
< |
if (xback < 0 && yback[x] < 0) |
| 474 |
> |
/* |
| 475 |
> |
* Check to see if we have no background for |
| 476 |
> |
* this pixel. If not, use background color. |
| 477 |
> |
*/ |
| 478 |
> |
if (xback < 0 && yback[x] < 0) { |
| 479 |
> |
(*deffill)(x,y); |
| 480 |
|
continue; |
| 481 |
< |
if (yback[x] < 0 || ABS(x-xback) <= 1 |
| 481 |
> |
} |
| 482 |
> |
/* |
| 483 |
> |
* Compare, and use the background that is |
| 484 |
> |
* farther, unless one of them is next to us. |
| 485 |
> |
*/ |
| 486 |
> |
if ( yback[x] < 0 |
| 487 |
> |
|| (xback >= 0 && ABS(x-xback) <= 1) |
| 488 |
|
|| ( ABS(y-yback[x]) > 1 |
| 489 |
< |
&& zscan(yback[x])[x] < zscan(y)[xback] )) |
| 489 |
> |
&& zscan(yback[x])[x] |
| 490 |
> |
< zscan(y)[xback] ) ) |
| 491 |
|
copycolr(pscan(y)[x],pscan(y)[xback]); |
| 492 |
|
else |
| 493 |
|
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
| 500 |
|
} |
| 501 |
|
|
| 502 |
|
|
| 503 |
+ |
fillpicture() /* paint in empty pixels with default */ |
| 504 |
+ |
{ |
| 505 |
+ |
register int x, y; |
| 506 |
+ |
|
| 507 |
+ |
for (y = 0; y < ourview.vresolu; y++) |
| 508 |
+ |
for (x = 0; x < ourview.hresolu; x++) |
| 509 |
+ |
if (zscan(y)[x] <= 0) |
| 510 |
+ |
(*deffill)(x,y); |
| 511 |
+ |
} |
| 512 |
+ |
|
| 513 |
+ |
|
| 514 |
|
writepicture() /* write out picture */ |
| 515 |
|
{ |
| 516 |
|
int y; |
| 521 |
|
perror(progname); |
| 522 |
|
exit(1); |
| 523 |
|
} |
| 524 |
+ |
} |
| 525 |
+ |
|
| 526 |
+ |
|
| 527 |
+ |
writedistance(fname) /* write out z file */ |
| 528 |
+ |
char *fname; |
| 529 |
+ |
{ |
| 530 |
+ |
extern double sqrt(); |
| 531 |
+ |
int donorm = normdist && ourview.type == VT_PER; |
| 532 |
+ |
FILE *fp; |
| 533 |
+ |
int y; |
| 534 |
+ |
float *zout; |
| 535 |
+ |
|
| 536 |
+ |
if ((fp = fopen(fname, "w")) == NULL) { |
| 537 |
+ |
perror(fname); |
| 538 |
+ |
exit(1); |
| 539 |
+ |
} |
| 540 |
+ |
if (donorm |
| 541 |
+ |
&& (zout = (float *)malloc(ourview.hresolu*sizeof(float))) == NULL) { |
| 542 |
+ |
perror(progname); |
| 543 |
+ |
exit(1); |
| 544 |
+ |
} |
| 545 |
+ |
for (y = ourview.vresolu-1; y >= 0; y--) { |
| 546 |
+ |
if (donorm) { |
| 547 |
+ |
double vx, yzn2; |
| 548 |
+ |
register int x; |
| 549 |
+ |
yzn2 = y - .5*(ourview.vresolu-1); |
| 550 |
+ |
yzn2 = 1. + yzn2*yzn2*ourview.vvn2; |
| 551 |
+ |
for (x = 0; x < ourview.hresolu; x++) { |
| 552 |
+ |
vx = x - .5*(ourview.hresolu-1); |
| 553 |
+ |
zout[x] = zscan(y)[x] |
| 554 |
+ |
* sqrt(vx*vx*ourview.vhn2 + yzn2); |
| 555 |
+ |
} |
| 556 |
+ |
} else |
| 557 |
+ |
zout = zscan(y); |
| 558 |
+ |
if (fwrite(zout, sizeof(float), ourview.hresolu, fp) |
| 559 |
+ |
< ourview.hresolu) { |
| 560 |
+ |
perror(fname); |
| 561 |
+ |
exit(1); |
| 562 |
+ |
} |
| 563 |
+ |
} |
| 564 |
+ |
if (donorm) |
| 565 |
+ |
free((char *)zout); |
| 566 |
+ |
fclose(fp); |
| 567 |
+ |
} |
| 568 |
+ |
|
| 569 |
+ |
|
| 570 |
+ |
isfloat(s) /* see if string is floating number */ |
| 571 |
+ |
register char *s; |
| 572 |
+ |
{ |
| 573 |
+ |
for ( ; *s; s++) |
| 574 |
+ |
if ((*s < '0' || *s > '9') && *s != '.' && *s != '-' |
| 575 |
+ |
&& *s != 'e' && *s != 'E' && *s != '+') |
| 576 |
+ |
return(0); |
| 577 |
+ |
return(1); |
| 578 |
+ |
} |
| 579 |
+ |
|
| 580 |
+ |
|
| 581 |
+ |
backfill(x, y) /* fill pixel with background */ |
| 582 |
+ |
int x, y; |
| 583 |
+ |
{ |
| 584 |
+ |
register BYTE *dest = pscan(y)[x]; |
| 585 |
+ |
|
| 586 |
+ |
copycolr(dest, backcolr); |
| 587 |
|
} |