1 |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Interpolate and extrapolate pictures with different view parameters. |
9 |
* |
10 |
* Greg Ward 09Dec89 |
11 |
*/ |
12 |
|
13 |
#include "standard.h" |
14 |
|
15 |
#include <fcntl.h> |
16 |
|
17 |
#include <ctype.h> |
18 |
|
19 |
#include "view.h" |
20 |
|
21 |
#include "color.h" |
22 |
|
23 |
#include "resolu.h" |
24 |
|
25 |
#ifndef BSD |
26 |
#define vfork fork |
27 |
#endif |
28 |
|
29 |
#define pscan(y) (ourpict+(y)*hresolu) |
30 |
#define zscan(y) (ourzbuf+(y)*hresolu) |
31 |
|
32 |
#define F_FORE 1 /* fill foreground */ |
33 |
#define F_BACK 2 /* fill background */ |
34 |
|
35 |
#define PACKSIZ 256 /* max. calculation packet size */ |
36 |
|
37 |
#define RTCOM "rtrace -h- -ovl -fff " |
38 |
|
39 |
#define ABS(x) ((x)>0?(x):-(x)) |
40 |
|
41 |
struct position {int x,y; float z;}; |
42 |
|
43 |
VIEW ourview = STDVIEW; /* desired view */ |
44 |
int hresolu = 512; /* horizontal resolution */ |
45 |
int vresolu = 512; /* vertical resolution */ |
46 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
47 |
|
48 |
double zeps = .02; /* allowed z epsilon */ |
49 |
|
50 |
COLR *ourpict; /* output picture */ |
51 |
float *ourzbuf; /* corresponding z-buffer */ |
52 |
|
53 |
char *progname; |
54 |
|
55 |
int fillo = F_FORE|F_BACK; /* selected fill options */ |
56 |
int fillsamp = 0; /* sample separation (0 == inf) */ |
57 |
extern int backfill(), rcalfill(); /* fill functions */ |
58 |
int (*fillfunc)() = backfill; /* selected fill function */ |
59 |
COLR backcolr = BLKCOLR; /* background color */ |
60 |
double backz = 0.0; /* background z value */ |
61 |
int normdist = 1; /* normalized distance? */ |
62 |
double ourexp = -1; /* output picture exposure */ |
63 |
|
64 |
VIEW theirview = STDVIEW; /* input view */ |
65 |
int gotview; /* got input view? */ |
66 |
int wrongformat = 0; /* input in another format? */ |
67 |
RESOLU tresolu; /* input resolution */ |
68 |
double theirexp; /* input picture exposure */ |
69 |
double theirs2ours[4][4]; /* transformation matrix */ |
70 |
int hasmatrix = 0; /* has transformation matrix */ |
71 |
|
72 |
int PDesc[3] = {-1,-1,-1}; /* rtrace process descriptor */ |
73 |
#define childpid (PDesc[2]) |
74 |
unsigned short queue[PACKSIZ][2]; /* pending pixels */ |
75 |
int packsiz; /* actual packet size */ |
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int queuesiz; /* number of pixels pending */ |
77 |
|
78 |
|
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main(argc, argv) /* interpolate pictures */ |
80 |
int argc; |
81 |
char *argv[]; |
82 |
{ |
83 |
#define check(ol,al) if (argv[i][ol] || \ |
84 |
badarg(argc-i-1,argv+i+1,al)) \ |
85 |
goto badopt |
86 |
int gotvfile = 0; |
87 |
char *zfile = NULL; |
88 |
char *err; |
89 |
int i, rval; |
90 |
|
91 |
progname = argv[0]; |
92 |
|
93 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
94 |
rval = getviewopt(&ourview, argc-i, argv+i); |
95 |
if (rval >= 0) { |
96 |
i += rval; |
97 |
continue; |
98 |
} |
99 |
switch (argv[i][1]) { |
100 |
case 't': /* threshold */ |
101 |
check(2,"f"); |
102 |
zeps = atof(argv[++i]); |
103 |
break; |
104 |
case 'n': /* dist. normalized? */ |
105 |
check(2,NULL); |
106 |
normdist = !normdist; |
107 |
break; |
108 |
case 'f': /* fill type */ |
109 |
switch (argv[i][2]) { |
110 |
case '0': /* none */ |
111 |
check(3,NULL); |
112 |
fillo = 0; |
113 |
break; |
114 |
case 'f': /* foreground */ |
115 |
check(3,NULL); |
116 |
fillo = F_FORE; |
117 |
break; |
118 |
case 'b': /* background */ |
119 |
check(3,NULL); |
120 |
fillo = F_BACK; |
121 |
break; |
122 |
case 'a': /* all */ |
123 |
check(3,NULL); |
124 |
fillo = F_FORE|F_BACK; |
125 |
break; |
126 |
case 's': /* sample */ |
127 |
check(3,"i"); |
128 |
fillsamp = atoi(argv[++i]); |
129 |
break; |
130 |
case 'c': /* color */ |
131 |
check(3,"fff"); |
132 |
fillfunc = backfill; |
133 |
setcolr(backcolr, atof(argv[i+1]), |
134 |
atof(argv[i+2]), atof(argv[i+3])); |
135 |
i += 3; |
136 |
break; |
137 |
case 'z': /* z value */ |
138 |
check(3,"f"); |
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fillfunc = backfill; |
140 |
backz = atof(argv[++i]); |
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break; |
142 |
case 'r': /* rtrace */ |
143 |
check(3,"s"); |
144 |
fillfunc = rcalfill; |
145 |
calstart(RTCOM, argv[++i]); |
146 |
break; |
147 |
default: |
148 |
goto badopt; |
149 |
} |
150 |
break; |
151 |
case 'z': /* z file */ |
152 |
check(2,"s"); |
153 |
zfile = argv[++i]; |
154 |
break; |
155 |
case 'x': /* x resolution */ |
156 |
check(2,"i"); |
157 |
hresolu = atoi(argv[++i]); |
158 |
break; |
159 |
case 'y': /* y resolution */ |
160 |
check(2,"i"); |
161 |
vresolu = atoi(argv[++i]); |
162 |
break; |
163 |
case 'p': /* pixel aspect */ |
164 |
if (argv[i][2] != 'a') |
165 |
goto badopt; |
166 |
check(3,"f"); |
167 |
pixaspect = atof(argv[++i]); |
168 |
break; |
169 |
case 'v': /* view file */ |
170 |
if (argv[i][2] != 'f') |
171 |
goto badopt; |
172 |
check(3,"s"); |
173 |
gotvfile = viewfile(argv[++i], &ourview, 0, 0); |
174 |
if (gotvfile < 0) { |
175 |
perror(argv[i]); |
176 |
exit(1); |
177 |
} else if (gotvfile == 0) { |
178 |
fprintf(stderr, "%s: bad view file\n", |
179 |
argv[i]); |
180 |
exit(1); |
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} |
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break; |
183 |
default: |
184 |
badopt: |
185 |
fprintf(stderr, "%s: command line error at '%s'\n", |
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progname, argv[i]); |
187 |
goto userr; |
188 |
} |
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} |
190 |
/* check arguments */ |
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if ((argc-i)%2) |
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goto userr; |
193 |
if (fillsamp == 1) |
194 |
fillo &= ~F_BACK; |
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/* set view */ |
196 |
if (err = setview(&ourview)) { |
197 |
fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
200 |
normaspect(viewaspect(&ourview), &pixaspect, &hresolu, &vresolu); |
201 |
/* allocate frame */ |
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ourpict = (COLR *)bmalloc(hresolu*vresolu*sizeof(COLR)); |
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ourzbuf = (float *)bmalloc(hresolu*vresolu*sizeof(float)); |
204 |
if (ourpict == NULL || ourzbuf == NULL) |
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syserror(); |
206 |
bzero((char *)ourzbuf, hresolu*vresolu*sizeof(float)); |
207 |
/* get input */ |
208 |
for ( ; i < argc; i += 2) |
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addpicture(argv[i], argv[i+1]); |
210 |
/* fill in spaces */ |
211 |
if (fillo&F_BACK) |
212 |
backpicture(fillfunc, fillsamp); |
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else |
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fillpicture(fillfunc); |
215 |
/* close calculation */ |
216 |
caldone(); |
217 |
/* add to header */ |
218 |
printargs(argc, argv, stdout); |
219 |
if (gotvfile) { |
220 |
fputs(VIEWSTR, stdout); |
221 |
fprintview(&ourview, stdout); |
222 |
putc('\n', stdout); |
223 |
} |
224 |
if (pixaspect < .99 || pixaspect > 1.01) |
225 |
fputaspect(pixaspect, stdout); |
226 |
if (ourexp > 0 && (ourexp < .995 || ourexp > 1.005)) |
227 |
fputexpos(ourexp, stdout); |
228 |
fputformat(COLRFMT, stdout); |
229 |
putc('\n', stdout); |
230 |
/* write picture */ |
231 |
writepicture(); |
232 |
/* write z file */ |
233 |
if (zfile != NULL) |
234 |
writedistance(zfile); |
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|
236 |
exit(0); |
237 |
userr: |
238 |
fprintf(stderr, |
239 |
"Usage: %s [view opts][-t eps][-z zout][-fT][-n] pfile zspec ..\n", |
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progname); |
241 |
exit(1); |
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#undef check |
243 |
} |
244 |
|
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|
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headline(s) /* process header string */ |
247 |
char *s; |
248 |
{ |
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char fmt[32]; |
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|
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if (isformat(s)) { |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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return; |
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} |
256 |
putc('\t', stdout); |
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fputs(s, stdout); |
258 |
|
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if (isexpos(s)) { |
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theirexp *= exposval(s); |
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return; |
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} |
263 |
if (isview(s) && sscanview(&theirview, s) > 0) |
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gotview++; |
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} |
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|
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|
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addpicture(pfile, zspec) /* add picture to output */ |
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char *pfile, *zspec; |
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{ |
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FILE *pfp; |
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int zfd; |
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char *err; |
274 |
COLR *scanin; |
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float *zin; |
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struct position *plast; |
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int y; |
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/* open picture file */ |
279 |
if ((pfp = fopen(pfile, "r")) == NULL) { |
280 |
perror(pfile); |
281 |
exit(1); |
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} |
283 |
/* get header with exposure and view */ |
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theirexp = 1.0; |
285 |
gotview = 0; |
286 |
printf("%s:\n", pfile); |
287 |
getheader(pfp, headline, NULL); |
288 |
if (wrongformat || !gotview || !fgetsresolu(&tresolu, pfp)) { |
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fprintf(stderr, "%s: picture format error\n", pfile); |
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exit(1); |
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} |
292 |
if (ourexp <= 0) |
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ourexp = theirexp; |
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else if (ABS(theirexp-ourexp) > .01*ourexp) |
295 |
fprintf(stderr, "%s: different exposure (warning)\n", pfile); |
296 |
if (err = setview(&theirview)) { |
297 |
fprintf(stderr, "%s: %s\n", pfile, err); |
298 |
exit(1); |
299 |
} |
300 |
/* compute transformation */ |
301 |
hasmatrix = pixform(theirs2ours, &theirview, &ourview); |
302 |
/* allocate scanlines */ |
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scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR)); |
304 |
zin = (float *)malloc(scanlen(&tresolu)*sizeof(float)); |
305 |
plast = (struct position *)calloc(scanlen(&tresolu), |
306 |
sizeof(struct position)); |
307 |
if (scanin == NULL || zin == NULL || plast == NULL) |
308 |
syserror(); |
309 |
/* get z specification or file */ |
310 |
if ((zfd = open(zspec, O_RDONLY)) == -1) { |
311 |
double zvalue; |
312 |
register int x; |
313 |
if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0) { |
314 |
perror(zspec); |
315 |
exit(1); |
316 |
} |
317 |
for (x = scanlen(&tresolu); x-- > 0; ) |
318 |
zin[x] = zvalue; |
319 |
} |
320 |
/* load image */ |
321 |
for (y = 0; y < numscans(&tresolu); y++) { |
322 |
if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) { |
323 |
fprintf(stderr, "%s: read error\n", pfile); |
324 |
exit(1); |
325 |
} |
326 |
if (zfd != -1 && read(zfd,(char *)zin, |
327 |
scanlen(&tresolu)*sizeof(float)) |
328 |
< scanlen(&tresolu)*sizeof(float)) { |
329 |
fprintf(stderr, "%s: read error\n", zspec); |
330 |
exit(1); |
331 |
} |
332 |
addscanline(y, scanin, zin, plast); |
333 |
} |
334 |
/* clean up */ |
335 |
free((char *)scanin); |
336 |
free((char *)zin); |
337 |
free((char *)plast); |
338 |
fclose(pfp); |
339 |
if (zfd != -1) |
340 |
close(zfd); |
341 |
} |
342 |
|
343 |
|
344 |
pixform(xfmat, vw1, vw2) /* compute view1 to view2 matrix */ |
345 |
register double xfmat[4][4]; |
346 |
register VIEW *vw1, *vw2; |
347 |
{ |
348 |
double m4t[4][4]; |
349 |
|
350 |
if (vw1->type != VT_PER && vw1->type != VT_PAR) |
351 |
return(0); |
352 |
if (vw2->type != VT_PER && vw2->type != VT_PAR) |
353 |
return(0); |
354 |
setident4(xfmat); |
355 |
xfmat[0][0] = vw1->hvec[0]; |
356 |
xfmat[0][1] = vw1->hvec[1]; |
357 |
xfmat[0][2] = vw1->hvec[2]; |
358 |
xfmat[1][0] = vw1->vvec[0]; |
359 |
xfmat[1][1] = vw1->vvec[1]; |
360 |
xfmat[1][2] = vw1->vvec[2]; |
361 |
xfmat[2][0] = vw1->vdir[0]; |
362 |
xfmat[2][1] = vw1->vdir[1]; |
363 |
xfmat[2][2] = vw1->vdir[2]; |
364 |
xfmat[3][0] = vw1->vp[0]; |
365 |
xfmat[3][1] = vw1->vp[1]; |
366 |
xfmat[3][2] = vw1->vp[2]; |
367 |
setident4(m4t); |
368 |
m4t[0][0] = vw2->hvec[0]/vw2->hn2; |
369 |
m4t[1][0] = vw2->hvec[1]/vw2->hn2; |
370 |
m4t[2][0] = vw2->hvec[2]/vw2->hn2; |
371 |
m4t[3][0] = -DOT(vw2->vp,vw2->hvec)/vw2->hn2; |
372 |
m4t[0][1] = vw2->vvec[0]/vw2->vn2; |
373 |
m4t[1][1] = vw2->vvec[1]/vw2->vn2; |
374 |
m4t[2][1] = vw2->vvec[2]/vw2->vn2; |
375 |
m4t[3][1] = -DOT(vw2->vp,vw2->vvec)/vw2->vn2; |
376 |
m4t[0][2] = vw2->vdir[0]; |
377 |
m4t[1][2] = vw2->vdir[1]; |
378 |
m4t[2][2] = vw2->vdir[2]; |
379 |
m4t[3][2] = -DOT(vw2->vp,vw2->vdir); |
380 |
multmat4(xfmat, xfmat, m4t); |
381 |
return(1); |
382 |
} |
383 |
|
384 |
|
385 |
addscanline(y, pline, zline, lasty) /* add scanline to output */ |
386 |
int y; |
387 |
COLR *pline; |
388 |
float *zline; |
389 |
struct position *lasty; /* input/output */ |
390 |
{ |
391 |
extern double sqrt(); |
392 |
FVECT pos; |
393 |
struct position lastx, newpos; |
394 |
register int x; |
395 |
|
396 |
lastx.z = 0; |
397 |
for (x = scanlen(&tresolu); x-- > 0; ) { |
398 |
pix2loc(pos, &tresolu, x, y); |
399 |
pos[2] = zline[x]; |
400 |
if (movepixel(pos) < 0) { |
401 |
lasty[x].z = lastx.z = 0; /* mark invalid */ |
402 |
continue; |
403 |
} |
404 |
newpos.x = pos[0] * hresolu; |
405 |
newpos.y = pos[1] * vresolu; |
406 |
newpos.z = zline[x]; |
407 |
/* add pixel to our image */ |
408 |
if (pos[0] >= 0 && newpos.x < hresolu |
409 |
&& pos[1] >= 0 && newpos.y < vresolu) { |
410 |
addpixel(&newpos, &lastx, &lasty[x], pline[x], pos[2]); |
411 |
lasty[x].x = lastx.x = newpos.x; |
412 |
lasty[x].y = lastx.y = newpos.y; |
413 |
lasty[x].z = lastx.z = newpos.z; |
414 |
} else |
415 |
lasty[x].z = lastx.z = 0; /* mark invalid */ |
416 |
} |
417 |
} |
418 |
|
419 |
|
420 |
addpixel(p0, p1, p2, pix, z) /* fill in pixel parallelogram */ |
421 |
struct position *p0, *p1, *p2; |
422 |
COLR pix; |
423 |
double z; |
424 |
{ |
425 |
double zt = 2.*zeps*p0->z; /* threshold */ |
426 |
int s1x, s1y, s2x, s2y; /* step sizes */ |
427 |
int l1, l2, c1, c2; /* side lengths and counters */ |
428 |
int p1isy; /* p0p1 along y? */ |
429 |
int x1, y1; /* p1 position */ |
430 |
register int x, y; /* final position */ |
431 |
|
432 |
/* compute vector p0p1 */ |
433 |
if (fillo&F_FORE && ABS(p1->z-p0->z) <= zt) { |
434 |
s1x = p1->x - p0->x; |
435 |
s1y = p1->y - p0->y; |
436 |
l1 = ABS(s1x); |
437 |
if (p1isy = (ABS(s1y) > l1)) |
438 |
l1 = ABS(s1y); |
439 |
} else { |
440 |
l1 = s1x = s1y = 1; |
441 |
p1isy = -1; |
442 |
} |
443 |
/* compute vector p0p2 */ |
444 |
if (fillo&F_FORE && ABS(p2->z-p0->z) <= zt) { |
445 |
s2x = p2->x - p0->x; |
446 |
s2y = p2->y - p0->y; |
447 |
if (p1isy == 1) |
448 |
l2 = ABS(s2x); |
449 |
else { |
450 |
l2 = ABS(s2y); |
451 |
if (p1isy != 0 && ABS(s2x) > l2) |
452 |
l2 = ABS(s2x); |
453 |
} |
454 |
} else |
455 |
l2 = s2x = s2y = 1; |
456 |
/* fill the parallelogram */ |
457 |
for (c1 = l1; c1-- > 0; ) { |
458 |
x1 = p0->x + c1*s1x/l1; |
459 |
y1 = p0->y + c1*s1y/l1; |
460 |
for (c2 = l2; c2-- > 0; ) { |
461 |
x = x1 + c2*s2x/l2; |
462 |
if (x < 0 || x >= hresolu) |
463 |
continue; |
464 |
y = y1 + c2*s2y/l2; |
465 |
if (y < 0 || y >= vresolu) |
466 |
continue; |
467 |
if (zscan(y)[x] <= 0 || zscan(y)[x]-z |
468 |
> zeps*zscan(y)[x]) { |
469 |
zscan(y)[x] = z; |
470 |
copycolr(pscan(y)[x], pix); |
471 |
} |
472 |
} |
473 |
} |
474 |
} |
475 |
|
476 |
|
477 |
movepixel(pos) /* reposition image point */ |
478 |
FVECT pos; |
479 |
{ |
480 |
FVECT pt, direc; |
481 |
|
482 |
if (pos[2] <= 0) /* empty pixel */ |
483 |
return(-1); |
484 |
if (hasmatrix) { |
485 |
pos[0] += theirview.hoff - .5; |
486 |
pos[1] += theirview.voff - .5; |
487 |
if (theirview.type == VT_PER) { |
488 |
if (normdist) /* adjust for eye-ray distance */ |
489 |
pos[2] /= sqrt( 1. |
490 |
+ pos[0]*pos[0]*theirview.hn2 |
491 |
+ pos[1]*pos[1]*theirview.vn2 ); |
492 |
pos[0] *= pos[2]; |
493 |
pos[1] *= pos[2]; |
494 |
} |
495 |
multp3(pos, pos, theirs2ours); |
496 |
if (pos[2] <= 0) |
497 |
return(-1); |
498 |
if (ourview.type == VT_PER) { |
499 |
pos[0] /= pos[2]; |
500 |
pos[1] /= pos[2]; |
501 |
} |
502 |
pos[0] += .5 - ourview.hoff; |
503 |
pos[1] += .5 - ourview.voff; |
504 |
return(0); |
505 |
} |
506 |
if (viewray(pt, direc, &theirview, pos[0], pos[1]) < 0) |
507 |
return(-1); |
508 |
pt[0] += direc[0]*pos[2]; |
509 |
pt[1] += direc[1]*pos[2]; |
510 |
pt[2] += direc[2]*pos[2]; |
511 |
viewloc(pos, &ourview, pt); |
512 |
if (pos[2] <= 0) |
513 |
return(-1); |
514 |
return(0); |
515 |
} |
516 |
|
517 |
|
518 |
backpicture(fill, samp) /* background fill algorithm */ |
519 |
int (*fill)(); |
520 |
int samp; |
521 |
{ |
522 |
int *yback, xback; |
523 |
int y; |
524 |
register int x, i; |
525 |
/* get back buffer */ |
526 |
yback = (int *)malloc(hresolu*sizeof(int)); |
527 |
if (yback == NULL) |
528 |
syserror(); |
529 |
for (x = 0; x < hresolu; x++) |
530 |
yback[x] = -2; |
531 |
/* |
532 |
* Xback and yback are the pixel locations of suitable |
533 |
* background values in each direction. |
534 |
* A value of -2 means unassigned, and -1 means |
535 |
* that there is no suitable background in this direction. |
536 |
*/ |
537 |
/* fill image */ |
538 |
for (y = 0; y < vresolu; y++) { |
539 |
xback = -2; |
540 |
for (x = 0; x < hresolu; x++) |
541 |
if (zscan(y)[x] <= 0) { /* empty pixel */ |
542 |
/* |
543 |
* First, find background from above or below. |
544 |
* (farthest assigned pixel) |
545 |
*/ |
546 |
if (yback[x] == -2) { |
547 |
for (i = y+1; i < vresolu; i++) |
548 |
if (zscan(i)[x] > 0) |
549 |
break; |
550 |
if (i < vresolu |
551 |
&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) |
552 |
yback[x] = i; |
553 |
else |
554 |
yback[x] = y-1; |
555 |
} |
556 |
/* |
557 |
* Next, find background from left or right. |
558 |
*/ |
559 |
if (xback == -2) { |
560 |
for (i = x+1; i < hresolu; i++) |
561 |
if (zscan(y)[i] > 0) |
562 |
break; |
563 |
if (i < hresolu |
564 |
&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) |
565 |
xback = i; |
566 |
else |
567 |
xback = x-1; |
568 |
} |
569 |
/* |
570 |
* If we have no background for this pixel, |
571 |
* use the given fill function. |
572 |
*/ |
573 |
if (xback < 0 && yback[x] < 0) |
574 |
goto fillit; |
575 |
/* |
576 |
* Compare, and use the background that is |
577 |
* farther, unless one of them is next to us. |
578 |
* If the background is too distant, call |
579 |
* the fill function. |
580 |
*/ |
581 |
if ( yback[x] < 0 |
582 |
|| (xback >= 0 && ABS(x-xback) <= 1) |
583 |
|| ( ABS(y-yback[x]) > 1 |
584 |
&& zscan(yback[x])[x] |
585 |
< zscan(y)[xback] ) ) { |
586 |
if (samp > 0 && ABS(x-xback) >= samp) |
587 |
goto fillit; |
588 |
copycolr(pscan(y)[x],pscan(y)[xback]); |
589 |
zscan(y)[x] = zscan(y)[xback]; |
590 |
} else { |
591 |
if (samp > 0 && ABS(y-yback[x]) > samp) |
592 |
goto fillit; |
593 |
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
594 |
zscan(y)[x] = zscan(yback[x])[x]; |
595 |
} |
596 |
continue; |
597 |
fillit: |
598 |
(*fill)(x,y); |
599 |
if (fill == rcalfill) { /* use it */ |
600 |
clearqueue(); |
601 |
xback = x; |
602 |
yback[x] = y; |
603 |
} |
604 |
} else { /* full pixel */ |
605 |
yback[x] = -2; |
606 |
xback = -2; |
607 |
} |
608 |
} |
609 |
free((char *)yback); |
610 |
} |
611 |
|
612 |
|
613 |
fillpicture(fill) /* paint in empty pixels using fill */ |
614 |
int (*fill)(); |
615 |
{ |
616 |
register int x, y; |
617 |
|
618 |
for (y = 0; y < vresolu; y++) |
619 |
for (x = 0; x < hresolu; x++) |
620 |
if (zscan(y)[x] <= 0) |
621 |
(*fill)(x,y); |
622 |
} |
623 |
|
624 |
|
625 |
writepicture() /* write out picture */ |
626 |
{ |
627 |
int y; |
628 |
|
629 |
fprtresolu(hresolu, vresolu, stdout); |
630 |
for (y = vresolu-1; y >= 0; y--) |
631 |
if (fwritecolrs(pscan(y), hresolu, stdout) < 0) |
632 |
syserror(); |
633 |
} |
634 |
|
635 |
|
636 |
writedistance(fname) /* write out z file */ |
637 |
char *fname; |
638 |
{ |
639 |
extern double sqrt(); |
640 |
int donorm = normdist && ourview.type == VT_PER; |
641 |
int fd; |
642 |
int y; |
643 |
float *zout; |
644 |
|
645 |
if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1) { |
646 |
perror(fname); |
647 |
exit(1); |
648 |
} |
649 |
if (donorm |
650 |
&& (zout = (float *)malloc(hresolu*sizeof(float))) == NULL) |
651 |
syserror(); |
652 |
for (y = vresolu-1; y >= 0; y--) { |
653 |
if (donorm) { |
654 |
double vx, yzn2; |
655 |
register int x; |
656 |
yzn2 = (y+.5)/vresolu + ourview.voff - .5; |
657 |
yzn2 = 1. + yzn2*yzn2*ourview.vn2; |
658 |
for (x = 0; x < hresolu; x++) { |
659 |
vx = (x+.5)/hresolu + ourview.hoff - .5; |
660 |
zout[x] = zscan(y)[x] |
661 |
* sqrt(vx*vx*ourview.hn2 + yzn2); |
662 |
} |
663 |
} else |
664 |
zout = zscan(y); |
665 |
if (write(fd, (char *)zout, hresolu*sizeof(float)) |
666 |
< hresolu*sizeof(float)) { |
667 |
perror(fname); |
668 |
exit(1); |
669 |
} |
670 |
} |
671 |
if (donorm) |
672 |
free((char *)zout); |
673 |
close(fd); |
674 |
} |
675 |
|
676 |
|
677 |
isfloat(s) /* see if string is floating number */ |
678 |
register char *s; |
679 |
{ |
680 |
for ( ; *s; s++) |
681 |
if ((*s < '0' || *s > '9') && *s != '.' && *s != '-' |
682 |
&& *s != 'e' && *s != 'E' && *s != '+') |
683 |
return(0); |
684 |
return(1); |
685 |
} |
686 |
|
687 |
|
688 |
backfill(x, y) /* fill pixel with background */ |
689 |
int x, y; |
690 |
{ |
691 |
register BYTE *dest = pscan(y)[x]; |
692 |
|
693 |
copycolr(dest, backcolr); |
694 |
zscan(y)[x] = backz; |
695 |
} |
696 |
|
697 |
|
698 |
calstart(prog, args) /* start fill calculation */ |
699 |
char *prog, *args; |
700 |
{ |
701 |
char combuf[512]; |
702 |
char *argv[64]; |
703 |
int rval; |
704 |
register char **wp, *cp; |
705 |
|
706 |
if (childpid != -1) { |
707 |
fprintf(stderr, "%s: too many calculations\n", progname); |
708 |
exit(1); |
709 |
} |
710 |
strcpy(combuf, prog); |
711 |
strcat(combuf, args); |
712 |
cp = combuf; |
713 |
wp = argv; |
714 |
for ( ; ; ) { |
715 |
while (isspace(*cp)) cp++; |
716 |
if (!*cp) break; |
717 |
*wp++ = cp; |
718 |
while (!isspace(*cp)) |
719 |
if (!*cp++) goto done; |
720 |
*cp++ = '\0'; |
721 |
} |
722 |
done: |
723 |
*wp = NULL; |
724 |
/* start process */ |
725 |
if ((rval = open_process(PDesc, argv)) < 0) |
726 |
syserror(); |
727 |
if (rval == 0) { |
728 |
fprintf(stderr, "%s: command not found\n", argv[0]); |
729 |
exit(1); |
730 |
} |
731 |
packsiz = rval/(6*sizeof(float)) - 1; |
732 |
if (packsiz > PACKSIZ) |
733 |
packsiz = PACKSIZ; |
734 |
queuesiz = 0; |
735 |
} |
736 |
|
737 |
|
738 |
caldone() /* done with calculation */ |
739 |
{ |
740 |
if (childpid == -1) |
741 |
return; |
742 |
clearqueue(); |
743 |
close_process(PDesc); |
744 |
childpid = -1; |
745 |
} |
746 |
|
747 |
|
748 |
rcalfill(x, y) /* fill with ray-calculated pixel */ |
749 |
int x, y; |
750 |
{ |
751 |
if (queuesiz >= packsiz) /* flush queue if needed */ |
752 |
clearqueue(); |
753 |
/* add position to queue */ |
754 |
queue[queuesiz][0] = x; |
755 |
queue[queuesiz][1] = y; |
756 |
queuesiz++; |
757 |
} |
758 |
|
759 |
|
760 |
clearqueue() /* process queue */ |
761 |
{ |
762 |
FVECT orig, dir; |
763 |
float fbuf[6*(PACKSIZ+1)]; |
764 |
register float *fbp; |
765 |
register int i; |
766 |
|
767 |
fbp = fbuf; |
768 |
for (i = 0; i < queuesiz; i++) { |
769 |
viewray(orig, dir, &ourview, |
770 |
(queue[i][0]+.5)/hresolu, |
771 |
(queue[i][1]+.5)/vresolu); |
772 |
*fbp++ = orig[0]; *fbp++ = orig[1]; *fbp++ = orig[2]; |
773 |
*fbp++ = dir[0]; *fbp++ = dir[1]; *fbp++ = dir[2]; |
774 |
} |
775 |
/* mark end and get results */ |
776 |
bzero((char *)fbp, 6*sizeof(float)); |
777 |
if (process(PDesc, fbuf, fbuf, 4*sizeof(float)*queuesiz, |
778 |
6*sizeof(float)*(queuesiz+1)) != |
779 |
4*sizeof(float)*queuesiz) { |
780 |
fprintf(stderr, "%s: error reading from rtrace process\n", |
781 |
progname); |
782 |
exit(1); |
783 |
} |
784 |
fbp = fbuf; |
785 |
for (i = 0; i < queuesiz; i++) { |
786 |
if (ourexp > 0 && ourexp != 1.0) { |
787 |
fbp[0] *= ourexp; |
788 |
fbp[1] *= ourexp; |
789 |
fbp[2] *= ourexp; |
790 |
} |
791 |
setcolr(pscan(queue[i][1])[queue[i][0]], |
792 |
fbp[0], fbp[1], fbp[2]); |
793 |
zscan(queue[i][1])[queue[i][0]] = fbp[3]; |
794 |
fbp += 4; |
795 |
} |
796 |
queuesiz = 0; |
797 |
} |
798 |
|
799 |
|
800 |
syserror() /* report error and exit */ |
801 |
{ |
802 |
perror(progname); |
803 |
exit(1); |
804 |
} |