| 1 |
greg |
1.1 |
#ifndef lint |
| 2 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
| 3 |
|
|
#endif |
| 4 |
|
|
|
| 5 |
|
|
/* |
| 6 |
|
|
* Interpolate and extrapolate pictures with different view parameters. |
| 7 |
|
|
* |
| 8 |
|
|
* Greg Ward 09Dec89 |
| 9 |
|
|
*/ |
| 10 |
|
|
|
| 11 |
|
|
#include "standard.h" |
| 12 |
|
|
|
| 13 |
|
|
#include "view.h" |
| 14 |
|
|
|
| 15 |
|
|
#include "color.h" |
| 16 |
|
|
|
| 17 |
|
|
#define pscan(y) (ourpict+(y)*ourview.hresolu) |
| 18 |
|
|
#define zscan(y) (ourzbuf+(y)*ourview.hresolu) |
| 19 |
|
|
|
| 20 |
greg |
1.3 |
#define ABS(x) ((x)>0?(x):-(x)) |
| 21 |
|
|
|
| 22 |
greg |
1.1 |
VIEW ourview = STDVIEW(512); /* desired view */ |
| 23 |
|
|
|
| 24 |
|
|
double zeps = 0.001; /* allowed z epsilon */ |
| 25 |
|
|
|
| 26 |
|
|
COLR *ourpict; /* output picture */ |
| 27 |
|
|
float *ourzbuf; /* corresponding z-buffer */ |
| 28 |
|
|
|
| 29 |
|
|
char *progname; |
| 30 |
|
|
|
| 31 |
|
|
VIEW theirview = STDVIEW(512); /* input view */ |
| 32 |
|
|
int gotview; /* got input view? */ |
| 33 |
|
|
|
| 34 |
greg |
1.5 |
double theirs2ours[4][4]; /* transformation matrix */ |
| 35 |
greg |
1.1 |
|
| 36 |
greg |
1.5 |
|
| 37 |
greg |
1.1 |
main(argc, argv) /* interpolate pictures */ |
| 38 |
|
|
int argc; |
| 39 |
|
|
char *argv[]; |
| 40 |
|
|
{ |
| 41 |
|
|
#define check(olen,narg) if (argv[i][olen] || narg >= argc-i) goto badopt |
| 42 |
|
|
int gotvfile = 0; |
| 43 |
|
|
char *err; |
| 44 |
|
|
int i; |
| 45 |
|
|
|
| 46 |
|
|
progname = argv[0]; |
| 47 |
|
|
|
| 48 |
|
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 49 |
|
|
switch (argv[i][1]) { |
| 50 |
|
|
case 't': /* threshold */ |
| 51 |
|
|
check(2,1); |
| 52 |
|
|
zeps = atof(argv[++i]); |
| 53 |
|
|
break; |
| 54 |
|
|
case 'v': /* view */ |
| 55 |
|
|
switch (argv[i][2]) { |
| 56 |
|
|
case 't': /* type */ |
| 57 |
|
|
check(4,0); |
| 58 |
|
|
ourview.type = argv[i][3]; |
| 59 |
|
|
break; |
| 60 |
|
|
case 'p': /* point */ |
| 61 |
|
|
check(3,3); |
| 62 |
|
|
ourview.vp[0] = atof(argv[++i]); |
| 63 |
|
|
ourview.vp[1] = atof(argv[++i]); |
| 64 |
|
|
ourview.vp[2] = atof(argv[++i]); |
| 65 |
|
|
break; |
| 66 |
|
|
case 'd': /* direction */ |
| 67 |
|
|
check(3,3); |
| 68 |
|
|
ourview.vdir[0] = atof(argv[++i]); |
| 69 |
|
|
ourview.vdir[1] = atof(argv[++i]); |
| 70 |
|
|
ourview.vdir[2] = atof(argv[++i]); |
| 71 |
|
|
break; |
| 72 |
|
|
case 'u': /* up */ |
| 73 |
|
|
check(3,3); |
| 74 |
|
|
ourview.vup[0] = atof(argv[++i]); |
| 75 |
|
|
ourview.vup[1] = atof(argv[++i]); |
| 76 |
|
|
ourview.vup[2] = atof(argv[++i]); |
| 77 |
|
|
break; |
| 78 |
|
|
case 'h': /* horizontal */ |
| 79 |
|
|
check(3,1); |
| 80 |
|
|
ourview.horiz = atof(argv[++i]); |
| 81 |
|
|
break; |
| 82 |
|
|
case 'v': /* vertical */ |
| 83 |
|
|
check(3,1); |
| 84 |
|
|
ourview.vert = atof(argv[++i]); |
| 85 |
|
|
break; |
| 86 |
|
|
case 'f': /* file */ |
| 87 |
|
|
check(3,1); |
| 88 |
|
|
gotvfile = viewfile(argv[++i], &ourview); |
| 89 |
|
|
if (gotvfile < 0) { |
| 90 |
|
|
perror(argv[i]); |
| 91 |
|
|
exit(1); |
| 92 |
|
|
} else if (gotvfile == 0) { |
| 93 |
|
|
fprintf(stderr, "%s: bad view file\n", |
| 94 |
|
|
argv[i]); |
| 95 |
|
|
exit(1); |
| 96 |
|
|
} |
| 97 |
|
|
break; |
| 98 |
|
|
default: |
| 99 |
|
|
goto badopt; |
| 100 |
|
|
} |
| 101 |
|
|
break; |
| 102 |
|
|
default: |
| 103 |
|
|
badopt: |
| 104 |
|
|
fprintf(stderr, "%s: unknown option '%s'\n", |
| 105 |
|
|
progname, argv[i]); |
| 106 |
|
|
exit(1); |
| 107 |
|
|
} |
| 108 |
|
|
/* check arguments */ |
| 109 |
|
|
if (argc-i < 2 || (argc-i)%2) { |
| 110 |
|
|
fprintf(stderr, "Usage: %s [view args] pfile zfile ..\n", |
| 111 |
|
|
progname); |
| 112 |
|
|
exit(1); |
| 113 |
|
|
} |
| 114 |
|
|
/* set view */ |
| 115 |
|
|
if (err = setview(&ourview)) { |
| 116 |
|
|
fprintf(stderr, "%s: %s\n", progname, err); |
| 117 |
|
|
exit(1); |
| 118 |
|
|
} |
| 119 |
|
|
/* allocate frame */ |
| 120 |
|
|
ourpict = (COLR *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR)); |
| 121 |
|
|
ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float)); |
| 122 |
|
|
if (ourpict == NULL || ourzbuf == NULL) { |
| 123 |
|
|
perror(progname); |
| 124 |
|
|
exit(1); |
| 125 |
|
|
} |
| 126 |
|
|
/* get input */ |
| 127 |
|
|
for ( ; i < argc; i += 2) |
| 128 |
|
|
addpicture(argv[i], argv[i+1]); |
| 129 |
|
|
/* fill in spaces */ |
| 130 |
|
|
fillpicture(); |
| 131 |
|
|
/* add to header */ |
| 132 |
|
|
printargs(argc, argv, stdout); |
| 133 |
|
|
if (gotvfile) { |
| 134 |
|
|
printf(VIEWSTR); |
| 135 |
|
|
fprintview(&ourview, stdout); |
| 136 |
|
|
printf("\n"); |
| 137 |
|
|
} |
| 138 |
|
|
printf("\n"); |
| 139 |
|
|
/* write output */ |
| 140 |
|
|
writepicture(); |
| 141 |
|
|
|
| 142 |
|
|
exit(0); |
| 143 |
|
|
#undef check |
| 144 |
|
|
} |
| 145 |
|
|
|
| 146 |
|
|
|
| 147 |
|
|
headline(s) /* process header string */ |
| 148 |
|
|
char *s; |
| 149 |
|
|
{ |
| 150 |
|
|
static char *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL}; |
| 151 |
|
|
register char **an; |
| 152 |
|
|
|
| 153 |
|
|
printf("\t%s", s); |
| 154 |
|
|
|
| 155 |
|
|
for (an = altname; *an != NULL; an++) |
| 156 |
|
|
if (!strncmp(*an, s, strlen(*an))) { |
| 157 |
|
|
if (sscanview(&theirview, s+strlen(*an)) == 0) |
| 158 |
|
|
gotview++; |
| 159 |
|
|
break; |
| 160 |
|
|
} |
| 161 |
|
|
} |
| 162 |
|
|
|
| 163 |
|
|
|
| 164 |
|
|
addpicture(pfile, zfile) /* add picture to output */ |
| 165 |
|
|
char *pfile, *zfile; |
| 166 |
|
|
{ |
| 167 |
|
|
FILE *pfp, *zfp; |
| 168 |
|
|
COLR *scanin; |
| 169 |
|
|
float *zin; |
| 170 |
|
|
char *err; |
| 171 |
|
|
int xres, yres; |
| 172 |
|
|
int y; |
| 173 |
|
|
/* open input files */ |
| 174 |
|
|
if ((pfp = fopen(pfile, "r")) == NULL) { |
| 175 |
|
|
perror(pfile); |
| 176 |
|
|
exit(1); |
| 177 |
|
|
} |
| 178 |
|
|
if ((zfp = fopen(zfile, "r")) == NULL) { |
| 179 |
|
|
perror(zfile); |
| 180 |
|
|
exit(1); |
| 181 |
|
|
} |
| 182 |
|
|
/* get header and view */ |
| 183 |
|
|
printf("%s:\n", pfile); |
| 184 |
|
|
gotview = 0; |
| 185 |
|
|
getheader(pfp, headline); |
| 186 |
|
|
if (!gotview || fgetresolu(&xres, &yres, pfp) != (YMAJOR|YDECR)) { |
| 187 |
|
|
fprintf(stderr, "%s: picture view error\n", pfile); |
| 188 |
|
|
exit(1); |
| 189 |
|
|
} |
| 190 |
|
|
theirview.hresolu = xres; |
| 191 |
|
|
theirview.vresolu = yres; |
| 192 |
|
|
if (err = setview(&theirview)) { |
| 193 |
|
|
fprintf(stderr, "%s: %s\n", pfile, err); |
| 194 |
|
|
exit(1); |
| 195 |
|
|
} |
| 196 |
greg |
1.5 |
/* compute transformation */ |
| 197 |
|
|
pixform(theirs2ours, &theirview, &ourview); |
| 198 |
greg |
1.1 |
/* allocate scanlines */ |
| 199 |
|
|
scanin = (COLR *)malloc(xres*sizeof(COLR)); |
| 200 |
|
|
zin = (float *)malloc(xres*sizeof(float)); |
| 201 |
|
|
if (scanin == NULL || zin == NULL) { |
| 202 |
|
|
perror(progname); |
| 203 |
|
|
exit(1); |
| 204 |
|
|
} |
| 205 |
|
|
/* load image */ |
| 206 |
|
|
for (y = yres-1; y >= 0; y--) { |
| 207 |
|
|
if (freadcolrs(scanin, xres, pfp) < 0) { |
| 208 |
|
|
fprintf(stderr, "%s: read error\n", pfile); |
| 209 |
|
|
exit(1); |
| 210 |
|
|
} |
| 211 |
|
|
if (fread(zin, sizeof(float), xres, zfp) < xres) { |
| 212 |
|
|
fprintf(stderr, "%s: read error\n", zfile); |
| 213 |
|
|
exit(1); |
| 214 |
|
|
} |
| 215 |
|
|
addscanline(y, scanin, zin); |
| 216 |
|
|
} |
| 217 |
|
|
/* clean up */ |
| 218 |
|
|
free((char *)scanin); |
| 219 |
|
|
free((char *)zin); |
| 220 |
|
|
fclose(pfp); |
| 221 |
|
|
fclose(zfp); |
| 222 |
|
|
} |
| 223 |
|
|
|
| 224 |
|
|
|
| 225 |
greg |
1.5 |
pixform(xfmat, vw1, vw2) /* compute view1 to view2 matrix */ |
| 226 |
|
|
register double xfmat[4][4]; |
| 227 |
|
|
register VIEW *vw1, *vw2; |
| 228 |
|
|
{ |
| 229 |
|
|
double m4t[4][4]; |
| 230 |
|
|
|
| 231 |
|
|
setident4(xfmat); |
| 232 |
|
|
xfmat[0][0] = vw1->vhinc[0]; |
| 233 |
|
|
xfmat[0][1] = vw1->vhinc[1]; |
| 234 |
|
|
xfmat[0][2] = vw1->vhinc[2]; |
| 235 |
|
|
xfmat[1][0] = vw1->vvinc[0]; |
| 236 |
|
|
xfmat[1][1] = vw1->vvinc[1]; |
| 237 |
|
|
xfmat[1][2] = vw1->vvinc[2]; |
| 238 |
|
|
xfmat[2][0] = vw1->vdir[0]; |
| 239 |
|
|
xfmat[2][1] = vw1->vdir[1]; |
| 240 |
|
|
xfmat[2][2] = vw1->vdir[2]; |
| 241 |
|
|
xfmat[3][0] = vw1->vp[0]; |
| 242 |
|
|
xfmat[3][1] = vw1->vp[1]; |
| 243 |
|
|
xfmat[3][2] = vw1->vp[2]; |
| 244 |
|
|
setident4(m4t); |
| 245 |
|
|
m4t[0][0] = vw2->vhinc[0]/vw2->vhn2; |
| 246 |
|
|
m4t[1][0] = vw2->vhinc[1]/vw2->vhn2; |
| 247 |
|
|
m4t[2][0] = vw2->vhinc[2]/vw2->vhn2; |
| 248 |
|
|
m4t[3][0] = -DOT(vw2->vp,vw2->vhinc)/vw2->vhn2; |
| 249 |
|
|
m4t[0][1] = vw2->vvinc[0]/vw2->vvn2; |
| 250 |
|
|
m4t[1][1] = vw2->vvinc[1]/vw2->vvn2; |
| 251 |
|
|
m4t[2][1] = vw2->vvinc[2]/vw2->vvn2; |
| 252 |
|
|
m4t[3][1] = -DOT(vw2->vp,vw2->vvinc)/vw2->vvn2; |
| 253 |
|
|
m4t[0][2] = vw2->vdir[0]; |
| 254 |
|
|
m4t[1][2] = vw2->vdir[1]; |
| 255 |
|
|
m4t[2][2] = vw2->vdir[2]; |
| 256 |
|
|
m4t[3][2] = -DOT(vw2->vp,vw2->vdir); |
| 257 |
|
|
multmat4(xfmat, xfmat, m4t); |
| 258 |
|
|
} |
| 259 |
|
|
|
| 260 |
|
|
|
| 261 |
greg |
1.1 |
addscanline(y, pline, zline) /* add scanline to output */ |
| 262 |
|
|
int y; |
| 263 |
|
|
COLR *pline; |
| 264 |
|
|
float *zline; |
| 265 |
|
|
{ |
| 266 |
greg |
1.5 |
extern double sqrt(); |
| 267 |
|
|
double pos[3]; |
| 268 |
greg |
1.1 |
register int x; |
| 269 |
|
|
register int xpos, ypos; |
| 270 |
|
|
|
| 271 |
|
|
for (x = 0; x < theirview.hresolu; x++) { |
| 272 |
greg |
1.5 |
pos[0] = x - .5*(theirview.hresolu-1); |
| 273 |
|
|
pos[1] = y - .5*(theirview.vresolu-1); |
| 274 |
|
|
pos[2] = zline[x]; |
| 275 |
|
|
if (theirview.type == VT_PER) { |
| 276 |
|
|
pos[2] /= sqrt( 1. |
| 277 |
|
|
+ pos[0]*pos[0]*theirview.vhn2 |
| 278 |
|
|
+ pos[1]*pos[1]*theirview.vvn2 ); |
| 279 |
|
|
pos[0] *= pos[2]; |
| 280 |
|
|
pos[1] *= pos[2]; |
| 281 |
|
|
} |
| 282 |
|
|
multp3(pos, pos, theirs2ours); |
| 283 |
|
|
if (pos[2] <= 0.0) |
| 284 |
greg |
1.1 |
continue; |
| 285 |
greg |
1.5 |
if (ourview.type == VT_PER) { |
| 286 |
|
|
pos[0] /= pos[2]; |
| 287 |
|
|
pos[1] /= pos[2]; |
| 288 |
|
|
} |
| 289 |
|
|
pos[0] += .5*ourview.hresolu; |
| 290 |
|
|
pos[1] += .5*ourview.vresolu; |
| 291 |
|
|
if (pos[0] < 0 || pos[0] > ourview.hresolu |
| 292 |
|
|
|| pos[1] < 0 || pos[1] > ourview.vresolu) |
| 293 |
|
|
continue; |
| 294 |
|
|
/* check current value at pos */ |
| 295 |
|
|
xpos = pos[0]; |
| 296 |
|
|
ypos = pos[1]; |
| 297 |
greg |
1.1 |
if (zscan(ypos)[xpos] <= 0.0 |
| 298 |
greg |
1.5 |
|| zscan(ypos)[xpos] - pos[2] |
| 299 |
greg |
1.1 |
> zeps*zscan(ypos)[xpos]) { |
| 300 |
greg |
1.5 |
zscan(ypos)[xpos] = pos[2]; |
| 301 |
greg |
1.1 |
copycolr(pscan(ypos)[xpos], pline[x]); |
| 302 |
|
|
} |
| 303 |
|
|
} |
| 304 |
|
|
} |
| 305 |
|
|
|
| 306 |
|
|
|
| 307 |
|
|
fillpicture() /* fill in empty spaces */ |
| 308 |
|
|
{ |
| 309 |
greg |
1.2 |
int *yback, xback; |
| 310 |
greg |
1.1 |
int y; |
| 311 |
greg |
1.2 |
COLR pfill; |
| 312 |
|
|
register int x, i; |
| 313 |
|
|
/* get back buffer */ |
| 314 |
|
|
yback = (int *)malloc(ourview.hresolu*sizeof(int)); |
| 315 |
|
|
if (yback == NULL) { |
| 316 |
|
|
perror(progname); |
| 317 |
|
|
return; |
| 318 |
|
|
} |
| 319 |
|
|
for (x = 0; x < ourview.hresolu; x++) |
| 320 |
greg |
1.4 |
yback[x] = -2; |
| 321 |
greg |
1.2 |
/* fill image */ |
| 322 |
greg |
1.4 |
for (y = 0; y < ourview.vresolu; y++) { |
| 323 |
|
|
xback = -2; |
| 324 |
greg |
1.1 |
for (x = 0; x < ourview.hresolu; x++) |
| 325 |
greg |
1.4 |
if (zscan(y)[x] <= 0.0) { /* empty pixel */ |
| 326 |
|
|
if (yback[x] == -2) { |
| 327 |
|
|
for (i = y+1; i < ourview.vresolu; i++) |
| 328 |
|
|
if (zscan(i)[x] > 0.0) |
| 329 |
|
|
break; |
| 330 |
|
|
if (i < ourview.vresolu |
| 331 |
greg |
1.2 |
&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) |
| 332 |
greg |
1.4 |
yback[x] = i; |
| 333 |
|
|
else |
| 334 |
|
|
yback[x] = y-1; |
| 335 |
greg |
1.2 |
} |
| 336 |
greg |
1.4 |
if (xback == -2) { |
| 337 |
|
|
for (i = x+1; x < ourview.hresolu; i++) |
| 338 |
|
|
if (zscan(y)[i] > 0.0) |
| 339 |
|
|
break; |
| 340 |
|
|
if (i < ourview.hresolu |
| 341 |
|
|
&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) |
| 342 |
|
|
xback = i; |
| 343 |
|
|
else |
| 344 |
|
|
xback = x-1; |
| 345 |
|
|
} |
| 346 |
|
|
if (xback < 0 && yback[x] < 0) |
| 347 |
|
|
continue; |
| 348 |
|
|
if (yback[x] < 0 || ABS(x-xback) <= 1 |
| 349 |
|
|
|| ( ABS(y-yback[x]) > 1 |
| 350 |
|
|
&& zscan(yback[x])[x] < zscan(y)[xback] )) |
| 351 |
|
|
copycolr(pscan(y)[x],pscan(y)[xback]); |
| 352 |
|
|
else |
| 353 |
|
|
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
| 354 |
|
|
} else { /* full pixel */ |
| 355 |
|
|
yback[x] = -2; |
| 356 |
|
|
xback = -2; |
| 357 |
|
|
} |
| 358 |
|
|
} |
| 359 |
greg |
1.2 |
free((char *)yback); |
| 360 |
greg |
1.1 |
} |
| 361 |
|
|
|
| 362 |
|
|
|
| 363 |
|
|
writepicture() /* write out picture */ |
| 364 |
|
|
{ |
| 365 |
|
|
int y; |
| 366 |
|
|
|
| 367 |
|
|
fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout); |
| 368 |
|
|
for (y = ourview.vresolu-1; y >= 0; y--) |
| 369 |
|
|
if (fwritecolrs(pscan(y), ourview.hresolu, stdout) < 0) { |
| 370 |
|
|
perror(progname); |
| 371 |
|
|
exit(1); |
| 372 |
|
|
} |
| 373 |
|
|
} |
