ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

root/radiance/ray/src/px/pinterp.c

Comparing ray/src/px/pinterp.c (file contents):
Revision 1.6 by greg, Thu Dec 28 15:09:28 1989 UTC vs.
Revision 2.33 by greg, Sat Feb 22 02:07:27 2003 UTC

#	Line 1 | Line 1
1		#ifndef lint
2	<	static char SCCSid[] = "$SunId$ LBL";
2	>	static const char       RCSid[] = "$Id$";
3		#endif
4	–
4		/*
5		* Interpolate and extrapolate pictures with different view parameters.
6		*
#	Line 10 | Line 9 | static char SCCSid[] = "$SunId$ LBL";
9
10		#include "standard.h"
11
12	+	#include <ctype.h>
13	+
14		#include "view.h"
15
16		#include "color.h"
17
18	<	#define pscan(y)        (ourpict+(y)*ourview.hresolu)
18	<	#define zscan(y)        (ourzbuf+(y)*ourview.hresolu)
18	>	#define LOG2            0.69314718055994530942
19
20	+	#define pscan(y)        (ourpict+(y)*hresolu)
21	+	#define sscan(y)        (ourspict+(y)*hresolu)
22	+	#define wscan(y)        (ourweigh+(y)*hresolu)
23	+	#define zscan(y)        (ourzbuf+(y)*hresolu)
24	+	#define bscan(y)        (ourbpict+(y)*hresolu)
25	+	#define averaging       (ourweigh != NULL)
26	+	#define blurring        (ourbpict != NULL)
27	+	#define usematrix       (hasmatrix & !averaging)
28	+	#define zisnorm         (!usematrix | ourview.type != VT_PER)
29	+
30	+	#define MAXWT           1000.           /* maximum pixel weight (averaging) */
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 -ld- -i- -I- "
38	+
39		#define ABS(x)          ((x)>0?(x):-(x))
40
41	<	VIEW    ourview = STDVIEW(512);         /* desired view */
41	>	struct position {int x,y; float z;};
42
43	<	double  zeps = 0.001;                   /* allowed z epsilon */
43	>	#define NSTEPS          64              /* number steps in overlap prescan */
44	>	#define MINSTEP         4               /* minimum worthwhile preview step */
45
46	<	COLR    *ourpict;                       /* output picture */
46	>	struct bound {int min,max;};
47	>
48	>	VIEW    ourview = STDVIEW;              /* desired view */
49	>	int     hresolu = 512;                  /* horizontal resolution */
50	>	int     vresolu = 512;                  /* vertical resolution */
51	>	double  pixaspect = 1.0;                /* pixel aspect ratio */
52	>
53	>	double  zeps = .02;                     /* allowed z epsilon */
54	>
55	>	COLR    *ourpict;                       /* output picture (COLR's) */
56	>	COLOR   *ourspict;                      /* output pixel sums (averaging) */
57	>	float   *ourweigh = NULL;               /* output pixel weights (averaging) */
58		float   *ourzbuf;                       /* corresponding z-buffer */
59	+	COLOR   *ourbpict = NULL;               /* blurred picture (view averaging) */
60
61	+	VIEW    avgview;                        /* average view for -B option */
62	+	int     nvavg;                          /* number of views averaged */
63	+
64		char    *progname;
65
66	<	VIEW    theirview = STDVIEW(512);       /* input view */
66	>	int     fillo = F_FORE|F_BACK;          /* selected fill options */
67	>	int     fillsamp = 0;                   /* sample separation (0 == inf) */
68	>	extern int      backfill(), rcalfill(); /* fill functions */
69	>	int     (*fillfunc)() = backfill;       /* selected fill function */
70	>	COLR    backcolr = BLKCOLR;             /* background color */
71	>	COLOR   backcolor = BLKCOLOR;           /* background color (float) */
72	>	double  backz = 0.0;                    /* background z value */
73	>	int     normdist = 1;                   /* i/o normalized distance? */
74	>	char    ourfmt[LPICFMT+1] = PICFMT;     /* original picture format */
75	>	double  ourexp = -1;                    /* original picture exposure */
76	>	int     expadj = 0;                     /* exposure adjustment (f-stops) */
77	>	double  rexpadj = 1;                    /* real exposure adjustment */
78	>
79	>	VIEW    theirview;                      /* input view */
80		int     gotview;                        /* got input view? */
81	+	int     wrongformat = 0;                /* input in another format? */
82	+	RESOLU  tresolu;                        /* input resolution */
83	+	double  theirexp;                       /* input picture exposure */
84	+	MAT4    theirs2ours;                    /* transformation matrix */
85	+	int     hasmatrix = 0;                  /* has transformation matrix */
86
87	<	double  theirs2ours[4][4];              /* transformation matrix */
87	>	int     PDesc[3] = {-1,-1,-1};          /* rtrace process descriptor */
88	>	#define childpid        (PDesc[2])
89	>	unsigned short  queue[PACKSIZ][2];      /* pending pixels */
90	>	int     packsiz;                        /* actual packet size */
91	>	int     queuesiz = 0;                   /* number of pixels pending */
92
93	+	extern double   movepixel();
94
95	+
96		main(argc, argv)                        /* interpolate pictures */
97		int     argc;
98		char    *argv[];
99		{
100	<	#define check(olen,narg)        if (argv[i][olen] || narg >= argc-i) goto badopt
100	>	#define  check(ol,al)           if (argv[an][ol] || \
101	>	badarg(argc-an-1,argv+an+1,al)) \
102	>	goto badopt
103		int     gotvfile = 0;
104	<	char    *err;
105	<	int     i;
104	>	int     doavg = -1;
105	>	int     doblur = 0;
106	>	char    *zfile = NULL;
107	>	char    *expcomp = NULL;
108	>	int     i, an, rval;
109
110		progname = argv[0];
111
112	<	for (i = 1; i < argc && argv[i][0] == '-'; i++)
113	<	switch (argv[i][1]) {
112	>	for (an = 1; an < argc && argv[an][0] == '-'; an++) {
113	>	rval = getviewopt(&ourview, argc-an, argv+an);
114	>	if (rval >= 0) {
115	>	an += rval;
116	>	continue;
117	>	}
118	>	switch (argv[an][1]) {
119	>	case 'e':                               /* exposure */
120	>	check(2,"f");
121	>	expcomp = argv[++an];
122	>	break;
123		case 't':                               /* threshold */
124	<	check(2,1);
125	<	zeps = atof(argv[++i]);
124	>	check(2,"f");
125	>	zeps = atof(argv[++an]);
126		break;
127	<	case 'x':                               /* x resolution */
128	<	check(2,1);
129	<	ourview.hresolu = atoi(argv[++i]);
127	>	case 'a':                               /* average */
128	>	check(2,NULL);
129	>	doavg = 1;
130		break;
131	<	case 'y':                               /* y resolution */
132	<	check(2,1);
133	<	ourview.vresolu = atoi(argv[++i]);
131	>	case 'B':                               /* blur views */
132	>	check(2,NULL);
133	>	doblur = 1;
134		break;
135	<	case 'v':                               /* view */
136	<	switch (argv[i][2]) {
137	<	case 't':                               /* type */
138	<	check(4,0);
139	<	ourview.type = argv[i][3];
135	>	case 'q':                               /* quick (no avg.) */
136	>	check(2,NULL);
137	>	doavg = 0;
138	>	break;
139	>	case 'n':                               /* dist. normalized? */
140	>	check(2,NULL);
141	>	normdist = !normdist;
142	>	break;
143	>	case 'f':                               /* fill type */
144	>	switch (argv[an][2]) {
145	>	case '0':                               /* none */
146	>	check(3,NULL);
147	>	fillo = 0;
148		break;
149	<	case 'p':                               /* point */
150	<	check(3,3);
151	<	ourview.vp[0] = atof(argv[++i]);
71	<	ourview.vp[1] = atof(argv[++i]);
72	<	ourview.vp[2] = atof(argv[++i]);
149	>	case 'f':                               /* foreground */
150	>	check(3,NULL);
151	>	fillo = F_FORE;
152		break;
153	<	case 'd':                               /* direction */
154	<	check(3,3);
155	<	ourview.vdir[0] = atof(argv[++i]);
77	<	ourview.vdir[1] = atof(argv[++i]);
78	<	ourview.vdir[2] = atof(argv[++i]);
153	>	case 'b':                               /* background */
154	>	check(3,NULL);
155	>	fillo = F_BACK;
156		break;
157	<	case 'u':                               /* up */
158	<	check(3,3);
159	<	ourview.vup[0] = atof(argv[++i]);
83	<	ourview.vup[1] = atof(argv[++i]);
84	<	ourview.vup[2] = atof(argv[++i]);
157	>	case 'a':                               /* all */
158	>	check(3,NULL);
159	>	fillo = F_FORE|F_BACK;
160		break;
161	<	case 'h':                               /* horizontal */
162	<	check(3,1);
163	<	ourview.horiz = atof(argv[++i]);
161	>	case 's':                               /* sample */
162	>	check(3,"i");
163	>	fillsamp = atoi(argv[++an]);
164		break;
165	<	case 'v':                               /* vertical */
166	<	check(3,1);
167	<	ourview.vert = atof(argv[++i]);
165	>	case 'c':                               /* color */
166	>	check(3,"fff");
167	>	fillfunc = backfill;
168	>	setcolor(backcolor, atof(argv[an+1]),
169	>	atof(argv[an+2]), atof(argv[an+3]));
170	>	setcolr(backcolr, colval(backcolor,RED),
171	>	colval(backcolor,GRN),
172	>	colval(backcolor,BLU));
173	>	an += 3;
174		break;
175	<	case 'f':                               /* file */
176	<	check(3,1);
177	<	gotvfile = viewfile(argv[++i], &ourview);
178	<	if (gotvfile < 0) {
98	<	perror(argv[i]);
99	<	exit(1);
100	<	} else if (gotvfile == 0) {
101	<	fprintf(stderr, "%s: bad view file\n",
102	<	argv[i]);
103	<	exit(1);
104	<	}
175	>	case 'z':                               /* z value */
176	>	check(3,"f");
177	>	fillfunc = backfill;
178	>	backz = atof(argv[++an]);
179		break;
180	+	case 'r':                               /* rtrace */
181	+	check(3,"s");
182	+	fillfunc = rcalfill;
183	+	calstart(RTCOM, argv[++an]);
184	+	break;
185		default:
186		goto badopt;
187		}
188		break;
189	+	case 'z':                               /* z file */
190	+	check(2,"s");
191	+	zfile = argv[++an];
192	+	break;
193	+	case 'x':                               /* x resolution */
194	+	check(2,"i");
195	+	hresolu = atoi(argv[++an]);
196	+	break;
197	+	case 'y':                               /* y resolution */
198	+	check(2,"i");
199	+	vresolu = atoi(argv[++an]);
200	+	break;
201	+	case 'p':                               /* pixel aspect */
202	+	if (argv[an][2] != 'a')
203	+	goto badopt;
204	+	check(3,"f");
205	+	pixaspect = atof(argv[++an]);
206	+	break;
207	+	case 'v':                               /* view file */
208	+	if (argv[an][2] != 'f')
209	+	goto badopt;
210	+	check(3,"s");
211	+	gotvfile = viewfile(argv[++an], &ourview, NULL);
212	+	if (gotvfile < 0)
213	+	syserror(argv[an]);
214	+	else if (gotvfile == 0) {
215	+	fprintf(stderr, "%s: bad view file\n",
216	+	argv[an]);
217	+	exit(1);
218	+	}
219	+	break;
220		default:
221		badopt:
222	<	fprintf(stderr, "%s: unknown option '%s'\n",
223	<	progname, argv[i]);
224	<	exit(1);
222	>	fprintf(stderr, "%s: command line error at '%s'\n",
223	>	progname, argv[an]);
224	>	goto userr;
225		}
226	+	}
227		/* check arguments */
228	<	if (argc-i < 2 || (argc-i)%2) {
229	<	fprintf(stderr, "Usage: %s [view args] pfile zfile ..\n",
228	>	if ((argc-an)%2)
229	>	goto userr;
230	>	if (fillsamp == 1)
231	>	fillo &= ~F_BACK;
232	>	if (doavg < 0)
233	>	doavg = (argc-an) > 2;
234	>	if (expcomp != NULL)
235	>	if (expcomp[0] == '+' | expcomp[0] == '-') {
236	>	expadj = atof(expcomp) + (expcomp[0]=='+' ? .5 : -.5);
237	>	if (doavg | doblur)
238	>	rexpadj = pow(2.0, atof(expcomp));
239	>	else
240	>	rexpadj = pow(2.0, (double)expadj);
241	>	} else {
242	>	if (!isflt(expcomp))
243	>	goto userr;
244	>	rexpadj = atof(expcomp);
245	>	expadj = log(rexpadj)/LOG2 + (rexpadj>1 ? .5 : -.5);
246	>	if (!(doavg | doblur))
247	>	rexpadj = pow(2.0, (double)expadj);
248	>	}
249	>	/* set view */
250	>	if (nextview(doblur ? stdin : (FILE *)NULL) == EOF) {
251	>	fprintf(stderr, "%s: no view on standard input!\n",
252		progname);
253		exit(1);
254		}
255	<	/* set view */
123	<	if (err = setview(&ourview)) {
124	<	fprintf(stderr, "%s: %s\n", progname, err);
125	<	exit(1);
126	<	}
255	>	normaspect(viewaspect(&ourview), &pixaspect, &hresolu, &vresolu);
256		/* allocate frame */
257	<	ourpict = (COLR *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR));
258	<	ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float));
259	<	if (ourpict == NULL || ourzbuf == NULL) {
260	<	perror(progname);
261	<	exit(1);
257	>	if (doavg) {
258	>	ourspict = (COLOR *)bmalloc(hresolu*vresolu*sizeof(COLOR));
259	>	ourweigh = (float *)bmalloc(hresolu*vresolu*sizeof(float));
260	>	if (ourspict == NULL | ourweigh == NULL)
261	>	syserror(progname);
262	>	} else {
263	>	ourpict = (COLR *)bmalloc(hresolu*vresolu*sizeof(COLR));
264	>	if (ourpict == NULL)
265	>	syserror(progname);
266		}
267	<	/* get input */
268	<	for ( ; i < argc; i += 2)
269	<	addpicture(argv[i], argv[i+1]);
270	<	/* fill in spaces */
271	<	fillpicture();
267	>	if (doblur) {
268	>	ourbpict = (COLOR *)bmalloc(hresolu*vresolu*sizeof(COLOR));
269	>	if (ourbpict == NULL)
270	>	syserror(progname);
271	>	}
272	>	ourzbuf = (float *)bmalloc(hresolu*vresolu*sizeof(float));
273	>	if (ourzbuf == NULL)
274	>	syserror(progname);
275	>	/* new header */
276	>	newheader("RADIANCE", stdout);
277	>	fputnow(stdout);
278	>	/* run pictures */
279	>	do {
280	>	bzero((char *)ourzbuf, hresolu*vresolu*sizeof(float));
281	>	for (i = an; i < argc; i += 2)
282	>	addpicture(argv[i], argv[i+1]);
283	>	if (fillo&F_BACK)                       /* fill in spaces */
284	>	backpicture(fillfunc, fillsamp);
285	>	else
286	>	fillpicture(fillfunc);
287	>	/* aft clipping */
288	>	clipaft();
289	>	} while (addblur() && nextview(stdin) != EOF);
290	>	/* close calculation */
291	>	caldone();
292		/* add to header */
293		printargs(argc, argv, stdout);
294	<	if (gotvfile) {
295	<	printf(VIEWSTR);
296	<	fprintview(&ourview, stdout);
297	<	printf("\n");
294	>	compavgview();
295	>	if (doblur | gotvfile) {
296	>	fputs(VIEWSTR, stdout);
297	>	fprintview(&avgview, stdout);
298	>	putc('\n', stdout);
299		}
300	<	printf("\n");
301	<	/* write output */
300	>	if (pixaspect < .99 | pixaspect > 1.01)
301	>	fputaspect(pixaspect, stdout);
302	>	if (ourexp > 0)
303	>	ourexp *= rexpadj;
304	>	else
305	>	ourexp = rexpadj;
306	>	if (ourexp < .995 | ourexp > 1.005)
307	>	fputexpos(ourexp, stdout);
308	>	if (strcmp(ourfmt, PICFMT))             /* print format if known */
309	>	fputformat(ourfmt, stdout);
310	>	putc('\n', stdout);
311	>	/* write picture */
312		writepicture();
313	+	/* write z file */
314	+	if (zfile != NULL)
315	+	writedistance(zfile);
316
317		exit(0);
318	+	userr:
319	+	fprintf(stderr,
320	+	"Usage: %s [view opts][-t eps][-z zout][-e spec][-B][-a|-q][-fT][-n] pfile zspec ..\n",
321	+	progname);
322	+	exit(1);
323		#undef check
324		}
325
326
327	+	int
328		headline(s)                             /* process header string */
329		char    *s;
330		{
331	<	static char     *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL};
159	<	register char   **an;
331	>	char    fmt[32];
332
333	<	printf("\t%s", s);
334	<
335	<	for (an = altname; *an != NULL; an++)
336	<	if (!strncmp(*an, s, strlen(*an))) {
337	<	if (sscanview(&theirview, s+strlen(*an)) == 0)
338	<	gotview++;
339	<	break;
340	<	}
333	>	if (isheadid(s))
334	>	return(0);
335	>	if (formatval(fmt, s)) {
336	>	if (globmatch(ourfmt, fmt)) {
337	>	wrongformat = 0;
338	>	strcpy(ourfmt, fmt);
339	>	} else
340	>	wrongformat = 1;
341	>	return(0);
342	>	}
343	>	if (nvavg < 2) {
344	>	putc('\t', stdout);
345	>	fputs(s, stdout);
346	>	}
347	>	if (isexpos(s)) {
348	>	theirexp *= exposval(s);
349	>	return(0);
350	>	}
351	>	if (isview(s) && sscanview(&theirview, s) > 0)
352	>	gotview++;
353	>	return(0);
354		}
355
356
357	<	addpicture(pfile, zfile)                /* add picture to output */
358	<	char    *pfile, *zfile;
357	>	nextview(fp)                            /* get and set next view */
358	>	FILE    *fp;
359		{
360	<	FILE    *pfp, *zfp;
176	<	COLR    *scanin;
177	<	float   *zin;
360	>	char    linebuf[256];
361		char    *err;
362	<	int     xres, yres;
363	<	int     y;
364	<	/* open input files */
365	<	if ((pfp = fopen(pfile, "r")) == NULL) {
366	<	perror(pfile);
367	<	exit(1);
362	>	register int    i;
363	>
364	>	if (fp != NULL) {
365	>	do                      /* get new view */
366	>	if (fgets(linebuf, sizeof(linebuf), fp) == NULL)
367	>	return(EOF);
368	>	while (!isview(linebuf) || !sscanview(&ourview, linebuf));
369		}
370	<	if ((zfp = fopen(zfile, "r")) == NULL) {
371	<	perror(zfile);
370	>	/* set new view */
371	>	if ((err = setview(&ourview)) != NULL) {
372	>	fprintf(stderr, "%s: %s\n", progname, err);
373		exit(1);
374		}
375	<	/* get header and view */
376	<	printf("%s:\n", pfile);
375	>	if (!nvavg) {                   /* first view */
376	>	copystruct(&avgview, &ourview);
377	>	return(nvavg++);
378	>	}
379	>	/* add to average view */
380	>	for (i = 0; i < 3; i++) {
381	>	avgview.vp[i] += ourview.vp[i];
382	>	avgview.vdir[i] += ourview.vdir[i];
383	>	avgview.vup[i] += ourview.vup[i];
384	>	}
385	>	avgview.horiz += ourview.horiz;
386	>	avgview.vert += ourview.vert;
387	>	avgview.hoff += ourview.hoff;
388	>	avgview.voff += ourview.voff;
389	>	avgview.vfore += ourview.vfore;
390	>	avgview.vaft += ourview.vaft;
391	>	return(nvavg++);
392	>	}
393	>
394	>
395	>	compavgview()                           /* compute average view */
396	>	{
397	>	register int    i;
398	>	double  f;
399	>
400	>	if (nvavg < 2)
401	>	return;
402	>	f = 1.0/nvavg;
403	>	for (i = 0; i < 3; i++) {
404	>	avgview.vp[i] *= f;
405	>	avgview.vdir[i] *= f;
406	>	avgview.vup[i] *= f;
407	>	}
408	>	avgview.horiz *= f;
409	>	avgview.vert *= f;
410	>	avgview.hoff *= f;
411	>	avgview.voff *= f;
412	>	avgview.vfore *= f;
413	>	avgview.vaft *= f;
414	>	if (setview(&avgview) != NULL)          /* in case of emergency... */
415	>	copystruct(&avgview, &ourview);
416	>	pixaspect = viewaspect(&avgview) * hresolu / vresolu;
417	>	}
418	>
419	>
420	>	addpicture(pfile, zspec)                /* add picture to output */
421	>	char    *pfile, *zspec;
422	>	{
423	>	FILE    *pfp;
424	>	int     zfd;
425	>	char    *err;
426	>	COLR    *scanin;
427	>	float   *zin;
428	>	struct position *plast;
429	>	struct bound    *xlim, ylim;
430	>	int     y;
431	>	/* open picture file */
432	>	if ((pfp = fopen(pfile, "r")) == NULL)
433	>	syserror(pfile);
434	>	/* get header with exposure and view */
435	>	theirexp = 1.0;
436	>	copystruct(&theirview, &stdview);
437		gotview = 0;
438	<	getheader(pfp, headline);
439	<	if (!gotview || fgetresolu(&xres, &yres, pfp) != (YMAJOR|YDECR)) {
440	<	fprintf(stderr, "%s: picture view error\n", pfile);
438	>	if (nvavg < 2)
439	>	printf("%s:\n", pfile);
440	>	getheader(pfp, headline, NULL);
441	>	if (wrongformat || !gotview || !fgetsresolu(&tresolu, pfp)) {
442	>	fprintf(stderr, "%s: picture format error\n", pfile);
443		exit(1);
444		}
445	<	theirview.hresolu = xres;
446	<	theirview.vresolu = yres;
445	>	if (ourexp <= 0)
446	>	ourexp = theirexp;
447	>	else if (ABS(theirexp-ourexp) > .01*ourexp)
448	>	fprintf(stderr, "%s: different exposure (warning)\n", pfile);
449		if (err = setview(&theirview)) {
450		fprintf(stderr, "%s: %s\n", pfile, err);
451		exit(1);
452		}
453		/* compute transformation */
454	<	pixform(theirs2ours, &theirview, &ourview);
455	<	/* allocate scanlines */
456	<	scanin = (COLR *)malloc(xres*sizeof(COLR));
457	<	zin = (float *)malloc(xres*sizeof(float));
458	<	if (scanin == NULL || zin == NULL) {
459	<	perror(progname);
460	<	exit(1);
454	>	hasmatrix = pixform(theirs2ours, &theirview, &ourview);
455	>	/* get z specification or file */
456	>	zin = (float *)malloc(scanlen(&tresolu)*sizeof(float));
457	>	if (zin == NULL)
458	>	syserror(progname);
459	>	if ((zfd = open(zspec, O_RDONLY)) == -1) {
460	>	double  zvalue;
461	>	register int    x;
462	>	if (!isflt(zspec) || (zvalue = atof(zspec)) <= 0.0)
463	>	syserror(zspec);
464	>	for (x = scanlen(&tresolu); x-- > 0; )
465	>	zin[x] = zvalue;
466		}
467	<	/* load image */
468	<	for (y = yres-1; y >= 0; y--) {
469	<	if (freadcolrs(scanin, xres, pfp) < 0) {
467	>	/* compute transferrable perimeter */
468	>	xlim = (struct bound *)malloc(numscans(&tresolu)*sizeof(struct bound));
469	>	if (xlim == NULL)
470	>	syserror(progname);
471	>	if (!getperim(xlim, &ylim, zin, zfd)) { /* overlapping area? */
472	>	free((void *)zin);
473	>	free((void *)xlim);
474	>	if (zfd != -1)
475	>	close(zfd);
476	>	fclose(pfp);
477	>	return;
478	>	}
479	>	/* allocate scanlines */
480	>	scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR));
481	>	plast = (struct position *)calloc(scanlen(&tresolu),
482	>	sizeof(struct position));
483	>	if (scanin == NULL | plast == NULL)
484	>	syserror(progname);
485	>	/* skip to starting point */
486	>	for (y = 0; y < ylim.min; y++)
487	>	if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) {
488		fprintf(stderr, "%s: read error\n", pfile);
489		exit(1);
490		}
491	<	if (fread(zin, sizeof(float), xres, zfp) < xres) {
492	<	fprintf(stderr, "%s: read error\n", zfile);
491	>	if (zfd != -1 && lseek(zfd,
492	>	(off_t)ylim.min*scanlen(&tresolu)*sizeof(float), 0) < 0)
493	>	syserror(zspec);
494	>	/* load image */
495	>	for (y = ylim.min; y <= ylim.max; y++) {
496	>	if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) {
497	>	fprintf(stderr, "%s: read error\n", pfile);
498		exit(1);
499		}
500	<	addscanline(y, scanin, zin);
500	>	if (zfd != -1 && read(zfd, (char *)zin,
501	>	scanlen(&tresolu)*sizeof(float))
502	>	< scanlen(&tresolu)*sizeof(float))
503	>	syserror(zspec);
504	>	addscanline(xlim+y, y, scanin, zin, plast);
505		}
506		/* clean up */
507	<	free((char *)scanin);
508	<	free((char *)zin);
507	>	free((void *)xlim);
508	>	free((void *)scanin);
509	>	free((void *)zin);
510	>	free((void *)plast);
511		fclose(pfp);
512	<	fclose(zfp);
512	>	if (zfd != -1)
513	>	close(zfd);
514		}
515
516
517		pixform(xfmat, vw1, vw2)                /* compute view1 to view2 matrix */
518	<	register double xfmat[4][4];
518	>	register MAT4   xfmat;
519		register VIEW   *vw1, *vw2;
520		{
521		double  m4t[4][4];
522
523	+	if (vw1->type != VT_PER & vw1->type != VT_PAR)
524	+	return(0);
525	+	if (vw2->type != VT_PER & vw2->type != VT_PAR)
526	+	return(0);
527		setident4(xfmat);
528	<	xfmat[0][0] = vw1->vhinc[0];
529	<	xfmat[0][1] = vw1->vhinc[1];
530	<	xfmat[0][2] = vw1->vhinc[2];
531	<	xfmat[1][0] = vw1->vvinc[0];
532	<	xfmat[1][1] = vw1->vvinc[1];
533	<	xfmat[1][2] = vw1->vvinc[2];
528	>	xfmat[0][0] = vw1->hvec[0];
529	>	xfmat[0][1] = vw1->hvec[1];
530	>	xfmat[0][2] = vw1->hvec[2];
531	>	xfmat[1][0] = vw1->vvec[0];
532	>	xfmat[1][1] = vw1->vvec[1];
533	>	xfmat[1][2] = vw1->vvec[2];
534		xfmat[2][0] = vw1->vdir[0];
535		xfmat[2][1] = vw1->vdir[1];
536		xfmat[2][2] = vw1->vdir[2];
#	Line 250 | Line 538 | register VIEW  *vw1, *vw2;
538		xfmat[3][1] = vw1->vp[1];
539		xfmat[3][2] = vw1->vp[2];
540		setident4(m4t);
541	<	m4t[0][0] = vw2->vhinc[0]/vw2->vhn2;
542	<	m4t[1][0] = vw2->vhinc[1]/vw2->vhn2;
543	<	m4t[2][0] = vw2->vhinc[2]/vw2->vhn2;
544	<	m4t[3][0] = -DOT(vw2->vp,vw2->vhinc)/vw2->vhn2;
545	<	m4t[0][1] = vw2->vvinc[0]/vw2->vvn2;
546	<	m4t[1][1] = vw2->vvinc[1]/vw2->vvn2;
547	<	m4t[2][1] = vw2->vvinc[2]/vw2->vvn2;
548	<	m4t[3][1] = -DOT(vw2->vp,vw2->vvinc)/vw2->vvn2;
541	>	m4t[0][0] = vw2->hvec[0]/vw2->hn2;
542	>	m4t[1][0] = vw2->hvec[1]/vw2->hn2;
543	>	m4t[2][0] = vw2->hvec[2]/vw2->hn2;
544	>	m4t[3][0] = -DOT(vw2->vp,vw2->hvec)/vw2->hn2;
545	>	m4t[0][1] = vw2->vvec[0]/vw2->vn2;
546	>	m4t[1][1] = vw2->vvec[1]/vw2->vn2;
547	>	m4t[2][1] = vw2->vvec[2]/vw2->vn2;
548	>	m4t[3][1] = -DOT(vw2->vp,vw2->vvec)/vw2->vn2;
549		m4t[0][2] = vw2->vdir[0];
550		m4t[1][2] = vw2->vdir[1];
551		m4t[2][2] = vw2->vdir[2];
552		m4t[3][2] = -DOT(vw2->vp,vw2->vdir);
553		multmat4(xfmat, xfmat, m4t);
554	+	return(1);
555		}
556
557
558	<	addscanline(y, pline, zline)            /* add scanline to output */
558	>	addscanline(xl, y, pline, zline, lasty) /* add scanline to output */
559	>	struct bound    *xl;
560		int     y;
561		COLR    *pline;
562		float   *zline;
563	+	struct position *lasty;         /* input/output */
564		{
565	<	extern double   sqrt();
566	<	double  pos[3];
565	>	FVECT   pos;
566	>	struct position lastx, newpos;
567	>	double  wt;
568		register int    x;
277	–	register int    xpos, ypos;
569
570	<	for (x = 0; x < theirview.hresolu; x++) {
571	<	pos[0] = x - .5*(theirview.hresolu-1);
572	<	pos[1] = y - .5*(theirview.vresolu-1);
570	>	lastx.z = 0;
571	>	for (x = xl->max; x >= xl->min; x--) {
572	>	pix2loc(pos, &tresolu, x, y);
573		pos[2] = zline[x];
574	+	if ((wt = movepixel(pos)) <= FTINY) {
575	+	lasty[x].z = lastx.z = 0;       /* mark invalid */
576	+	continue;
577	+	}
578	+	/* add pixel to our image */
579	+	newpos.x = pos[0] * hresolu;
580	+	newpos.y = pos[1] * vresolu;
581	+	newpos.z = zline[x];
582	+	addpixel(&newpos, &lastx, &lasty[x], pline[x], wt, pos[2]);
583	+	lasty[x].x = lastx.x = newpos.x;
584	+	lasty[x].y = lastx.y = newpos.y;
585	+	lasty[x].z = lastx.z = newpos.z;
586	+	}
587	+	}
588	+
589	+
590	+	addpixel(p0, p1, p2, pix, w, z)         /* fill in pixel parallelogram */
591	+	struct position *p0, *p1, *p2;
592	+	COLR    pix;
593	+	double  w;
594	+	double  z;
595	+	{
596	+	double  zt = 2.*zeps*p0->z;             /* threshold */
597	+	COLOR   pval;                           /* converted+weighted pixel */
598	+	int     s1x, s1y, s2x, s2y;             /* step sizes */
599	+	int     l1, l2, c1, c2;                 /* side lengths and counters */
600	+	int     p1isy;                          /* p0p1 along y? */
601	+	int     x1, y1;                         /* p1 position */
602	+	register int    x, y;                   /* final position */
603	+
604	+	/* compute vector p0p1 */
605	+	if (fillo&F_FORE && ABS(p1->z-p0->z) <= zt) {
606	+	s1x = p1->x - p0->x;
607	+	s1y = p1->y - p0->y;
608	+	l1 = ABS(s1x);
609	+	if (p1isy = (ABS(s1y) > l1))
610	+	l1 = ABS(s1y);
611	+	else if (l1 < 1)
612	+	l1 = 1;
613	+	} else {
614	+	l1 = s1x = s1y = 1;
615	+	p1isy = -1;
616	+	}
617	+	/* compute vector p0p2 */
618	+	if (fillo&F_FORE && ABS(p2->z-p0->z) <= zt) {
619	+	s2x = p2->x - p0->x;
620	+	s2y = p2->y - p0->y;
621	+	if (p1isy == 1)
622	+	l2 = ABS(s2x);
623	+	else {
624	+	l2 = ABS(s2y);
625	+	if (p1isy != 0 && ABS(s2x) > l2)
626	+	l2 = ABS(s2x);
627	+	}
628	+	if (l2 < 1)
629	+	l2 = 1;
630	+	} else
631	+	l2 = s2x = s2y = 1;
632	+	/* fill the parallelogram */
633	+	if (averaging) {
634	+	colr_color(pval, pix);
635	+	scalecolor(pval, w);
636	+	}
637	+	for (c1 = l1; c1-- > 0; ) {
638	+	x1 = p0->x + c1*s1x/l1;
639	+	y1 = p0->y + c1*s1y/l1;
640	+	for (c2 = l2; c2-- > 0; ) {
641	+	x = x1 + c2*s2x/l2;
642	+	if (x < 0 | x >= hresolu)
643	+	continue;
644	+	y = y1 + c2*s2y/l2;
645	+	if (y < 0 | y >= vresolu)
646	+	continue;
647	+	if (averaging) {
648	+	if (zscan(y)[x] <= 0 || zscan(y)[x]-z
649	+	> zeps*zscan(y)[x]) {
650	+	copycolor(sscan(y)[x], pval);
651	+	wscan(y)[x] = w;
652	+	zscan(y)[x] = z;
653	+	} else if (z-zscan(y)[x] <= zeps*zscan(y)[x]) {
654	+	addcolor(sscan(y)[x], pval);
655	+	wscan(y)[x] += w;
656	+	}
657	+	} else if (zscan(y)[x] <= 0 || zscan(y)[x]-z
658	+	> zeps*zscan(y)[x]) {
659	+	copycolr(pscan(y)[x], pix);
660	+	zscan(y)[x] = z;
661	+	}
662	+	}
663	+	}
664	+	}
665	+
666	+
667	+	double
668	+	movepixel(pos)                          /* reposition image point */
669	+	register FVECT  pos;
670	+	{
671	+	FVECT   pt, tdir, odir;
672	+	double  d;
673	+
674	+	if (pos[2] <= 0)                /* empty pixel */
675	+	return(0);
676	+	if (usematrix) {
677	+	pos[0] += theirview.hoff - .5;
678	+	pos[1] += theirview.voff - .5;
679	+	if (normdist & theirview.type == VT_PER)
680	+	d = sqrt(1. + pos[0]*pos[0]*theirview.hn2
681	+	+ pos[1]*pos[1]*theirview.vn2);
682	+	else
683	+	d = 1.;
684	+	pos[2] += d*theirview.vfore;
685		if (theirview.type == VT_PER) {
686	<	pos[2] /= sqrt( 1.
285	<	+ pos[0]*pos[0]*theirview.vhn2
286	<	+ pos[1]*pos[1]*theirview.vvn2 );
686	>	pos[2] /= d;
687		pos[0] *= pos[2];
688		pos[1] *= pos[2];
689		}
690		multp3(pos, pos, theirs2ours);
691	<	if (pos[2] <= 0.0)
692	<	continue;
691	>	if (pos[2] <= ourview.vfore)
692	>	return(0);
693		if (ourview.type == VT_PER) {
694		pos[0] /= pos[2];
695		pos[1] /= pos[2];
696		}
697	<	pos[0] += .5*ourview.hresolu;
698	<	pos[1] += .5*ourview.vresolu;
699	<	if (pos[0] < 0 || pos[0] > ourview.hresolu
700	<	|| pos[1] < 0 || pos[1] > ourview.vresolu)
701	<	continue;
702	<	/* check current value at pos */
703	<	xpos = pos[0];
704	<	ypos = pos[1];
705	<	if (zscan(ypos)[xpos] <= 0.0
706	<	|| zscan(ypos)[xpos] - pos[2]
707	<	> zeps*zscan(ypos)[xpos]) {
708	<	zscan(ypos)[xpos] = pos[2];
709	<	copycolr(pscan(ypos)[xpos], pline[x]);
697	>	pos[0] += .5 - ourview.hoff;
698	>	pos[1] += .5 - ourview.voff;
699	>	pos[2] -= ourview.vfore;
700	>	} else {
701	>	if (viewray(pt, tdir, &theirview, pos[0], pos[1]) < -FTINY)
702	>	return(0);
703	>	if (!normdist & theirview.type == VT_PER)       /* adjust */
704	>	pos[2] *= sqrt(1. + pos[0]*pos[0]*theirview.hn2
705	>	+ pos[1]*pos[1]*theirview.vn2);
706	>	pt[0] += tdir[0]*pos[2];
707	>	pt[1] += tdir[1]*pos[2];
708	>	pt[2] += tdir[2]*pos[2];
709	>	viewloc(pos, &ourview, pt);
710	>	if (pos[2] <= 0)
711	>	return(0);
712	>	}
713	>	if (pos[0] < 0 | pos[0] >= 1-FTINY | pos[1] < 0 | pos[1] >= 1-FTINY)
714	>	return(0);
715	>	if (!averaging)
716	>	return(1);
717	>	/* compute pixel weight */
718	>	if (ourview.type == VT_PAR) {
719	>	d = DOT(ourview.vdir,tdir);
720	>	d = 1. - d*d;
721	>	} else {
722	>	VSUB(odir, pt, ourview.vp);
723	>	d = DOT(odir,tdir);
724	>	d = 1. - d*d/DOT(odir,odir);
725	>	}
726	>	if (d <= 1./MAXWT/MAXWT)
727	>	return(MAXWT);          /* clip to maximum weight */
728	>	return(1./sqrt(d));
729	>	}
730	>
731	>
732	>	getperim(xl, yl, zline, zfd)            /* compute overlapping image area */
733	>	register struct bound   *xl;
734	>	struct bound    *yl;
735	>	float   *zline;
736	>	int     zfd;
737	>	{
738	>	int     step;
739	>	FVECT   pos;
740	>	register int    x, y;
741	>	/* set up step size */
742	>	if (scanlen(&tresolu) < numscans(&tresolu))
743	>	step = scanlen(&tresolu)/NSTEPS;
744	>	else
745	>	step = numscans(&tresolu)/NSTEPS;
746	>	if (step < MINSTEP) {                   /* not worth cropping? */
747	>	yl->min = 0;
748	>	yl->max = numscans(&tresolu) - 1;
749	>	x = scanlen(&tresolu) - 1;
750	>	for (y = numscans(&tresolu); y--; ) {
751	>	xl[y].min = 0;
752	>	xl[y].max = x;
753		}
754	+	return(1);
755		}
756	+	yl->min = 32000; yl->max = 0;           /* search for points on image */
757	+	for (y = step - 1; y < numscans(&tresolu); y += step) {
758	+	if (zfd != -1) {
759	+	if (lseek(zfd, (off_t)y*scanlen(&tresolu)*sizeof(float),
760	+	0) < 0)
761	+	syserror("lseek");
762	+	if (read(zfd, (char *)zline,
763	+	scanlen(&tresolu)*sizeof(float))
764	+	< scanlen(&tresolu)*sizeof(float))
765	+	syserror("read");
766	+	}
767	+	xl[y].min = 32000; xl[y].max = 0;               /* x max */
768	+	for (x = scanlen(&tresolu); (x -= step) > 0; ) {
769	+	pix2loc(pos, &tresolu, x, y);
770	+	pos[2] = zline[x];
771	+	if (movepixel(pos) > FTINY) {
772	+	xl[y].max = x + step - 1;
773	+	xl[y].min = x - step + 1;       /* x min */
774	+	if (xl[y].min < 0)
775	+	xl[y].min = 0;
776	+	for (x = step - 1; x < xl[y].max; x += step) {
777	+	pix2loc(pos, &tresolu, x, y);
778	+	pos[2] = zline[x];
779	+	if (movepixel(pos) > FTINY) {
780	+	xl[y].min = x - step + 1;
781	+	break;
782	+	}
783	+	}
784	+	if (y < yl->min)                /* y limits */
785	+	yl->min = y - step + 1;
786	+	yl->max = y + step - 1;
787	+	break;
788	+	}
789	+	}
790	+	/* fill in between */
791	+	if (y < step) {
792	+	xl[y-1].min = xl[y].min;
793	+	xl[y-1].max = xl[y].max;
794	+	} else {
795	+	if (xl[y].min < xl[y-step].min)
796	+	xl[y-1].min = xl[y].min;
797	+	else
798	+	xl[y-1].min = xl[y-step].min;
799	+	if (xl[y].max > xl[y-step].max)
800	+	xl[y-1].max = xl[y].max;
801	+	else
802	+	xl[y-1].max = xl[y-step].max;
803	+	}
804	+	for (x = 2; x < step; x++)
805	+	copystruct(xl+y-x, xl+y-1);
806	+	}
807	+	if (yl->max >= numscans(&tresolu))
808	+	yl->max = numscans(&tresolu) - 1;
809	+	y -= step;
810	+	for (x = numscans(&tresolu) - 1; x > y; x--)    /* fill bottom rows */
811	+	copystruct(xl+x, xl+y);
812	+	return(yl->max >= yl->min);
813		}
814
815
816	<	fillpicture()                           /* fill in empty spaces */
816	>	backpicture(fill, samp)                 /* background fill algorithm */
817	>	int     (*fill)();
818	>	int     samp;
819		{
820		int     *yback, xback;
821		int     y;
319	–	COLR    pfill;
822		register int    x, i;
823		/* get back buffer */
824	<	yback = (int *)malloc(ourview.hresolu*sizeof(int));
825	<	if (yback == NULL) {
826	<	perror(progname);
827	<	return;
326	<	}
327	<	for (x = 0; x < ourview.hresolu; x++)
824	>	yback = (int *)malloc(hresolu*sizeof(int));
825	>	if (yback == NULL)
826	>	syserror(progname);
827	>	for (x = 0; x < hresolu; x++)
828		yback[x] = -2;
829	+	/*
830	+	* Xback and yback are the pixel locations of suitable
831	+	* background values in each direction.
832	+	* A value of -2 means unassigned, and -1 means
833	+	* that there is no suitable background in this direction.
834	+	*/
835		/* fill image */
836	<	for (y = 0; y < ourview.vresolu; y++) {
836	>	for (y = 0; y < vresolu; y++) {
837		xback = -2;
838	<	for (x = 0; x < ourview.hresolu; x++)
839	<	if (zscan(y)[x] <= 0.0) {       /* empty pixel */
838	>	for (x = 0; x < hresolu; x++)
839	>	if (zscan(y)[x] <= 0) {         /* empty pixel */
840	>	/*
841	>	* First, find background from above or below.
842	>	* (farthest assigned pixel)
843	>	*/
844		if (yback[x] == -2) {
845	<	for (i = y+1; i < ourview.vresolu; i++)
846	<	if (zscan(i)[x] > 0.0)
845	>	for (i = y+1; i < vresolu; i++)
846	>	if (zscan(i)[x] > 0)
847		break;
848	<	if (i < ourview.vresolu
848	>	if (i < vresolu
849		&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x]))
850		yback[x] = i;
851		else
852		yback[x] = y-1;
853		}
854	+	/*
855	+	* Next, find background from left or right.
856	+	*/
857		if (xback == -2) {
858	<	for (i = x+1; x < ourview.hresolu; i++)
859	<	if (zscan(y)[i] > 0.0)
858	>	for (i = x+1; i < hresolu; i++)
859	>	if (zscan(y)[i] > 0)
860		break;
861	<	if (i < ourview.hresolu
861	>	if (i < hresolu
862		&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i]))
863		xback = i;
864		else
865		xback = x-1;
866		}
867	+	/*
868	+	* If we have no background for this pixel,
869	+	* use the given fill function.
870	+	*/
871		if (xback < 0 && yback[x] < 0)
872	<	continue;
873	<	if (yback[x] < 0 || ABS(x-xback) <= 1
872	>	goto fillit;
873	>	/*
874	>	* Compare, and use the background that is
875	>	* farther, unless one of them is next to us.
876	>	* If the background is too distant, call
877	>	* the fill function.
878	>	*/
879	>	if ( yback[x] < 0
880	>	|| (xback >= 0 && ABS(x-xback) <= 1)
881		|| ( ABS(y-yback[x]) > 1
882	<	&& zscan(yback[x])[x] < zscan(y)[xback] ))
883	<	copycolr(pscan(y)[x],pscan(y)[xback]);
884	<	else
885	<	copycolr(pscan(y)[x],pscan(yback[x])[x]);
882	>	&& zscan(yback[x])[x]
883	>	< zscan(y)[xback] ) ) {
884	>	if (samp > 0 && ABS(x-xback) >= samp)
885	>	goto fillit;
886	>	if (averaging) {
887	>	copycolor(sscan(y)[x],
888	>	sscan(y)[xback]);
889	>	wscan(y)[x] = wscan(y)[xback];
890	>	} else
891	>	copycolr(pscan(y)[x],
892	>	pscan(y)[xback]);
893	>	zscan(y)[x] = zscan(y)[xback];
894	>	} else {
895	>	if (samp > 0 && ABS(y-yback[x]) > samp)
896	>	goto fillit;
897	>	if (averaging) {
898	>	copycolor(sscan(y)[x],
899	>	sscan(yback[x])[x]);
900	>	wscan(y)[x] =
901	>	wscan(yback[x])[x];
902	>	} else
903	>	copycolr(pscan(y)[x],
904	>	pscan(yback[x])[x]);
905	>	zscan(y)[x] = zscan(yback[x])[x];
906	>	}
907	>	continue;
908	>	fillit:
909	>	(*fill)(x,y);
910	>	if (fill == rcalfill) {         /* use it */
911	>	clearqueue();
912	>	xback = x;
913	>	yback[x] = y;
914	>	}
915		} else {                                /* full pixel */
916		yback[x] = -2;
917		xback = -2;
918		}
919		}
920	<	free((char *)yback);
920	>	free((void *)yback);
921		}
922
923
924	<	writepicture()                          /* write out picture */
924	>	fillpicture(fill)               /* paint in empty pixels using fill */
925	>	int     (*fill)();
926		{
927	+	register int    x, y;
928	+
929	+	for (y = 0; y < vresolu; y++)
930	+	for (x = 0; x < hresolu; x++)
931	+	if (zscan(y)[x] <= 0)
932	+	(*fill)(x,y);
933	+	if (fill == rcalfill)
934	+	clearqueue();
935	+	}
936	+
937	+
938	+	clipaft()                       /* perform aft clipping as indicated */
939	+	{
940	+	register int    x, y;
941	+	int     adjtest = ourview.type == VT_PER & zisnorm;
942	+	double  tstdist;
943	+	double  yzn2, vx;
944	+
945	+	if (ourview.vaft <= FTINY)
946	+	return(0);
947	+	tstdist = ourview.vaft - ourview.vfore;
948	+	for (y = 0; y < vresolu; y++) {
949	+	if (adjtest) {                          /* adjust test */
950	+	yzn2 = (y+.5)/vresolu + ourview.voff - .5;
951	+	yzn2 = 1. + yzn2*yzn2*ourview.vn2;
952	+	tstdist = (ourview.vaft - ourview.vfore)*sqrt(yzn2);
953	+	}
954	+	for (x = 0; x < hresolu; x++)
955	+	if (zscan(y)[x] > tstdist) {
956	+	if (adjtest) {
957	+	vx = (x+.5)/hresolu + ourview.hoff - .5;
958	+	if (zscan(y)[x] <= (ourview.vaft -
959	+	ourview.vfore) *
960	+	sqrt(vx*vx*ourview.hn2 + yzn2))
961	+	continue;
962	+	}
963	+	if (averaging)
964	+	bzero(sscan(y)[x], sizeof(COLOR));
965	+	else
966	+	bzero(pscan(y)[x], sizeof(COLR));
967	+	zscan(y)[x] = 0.0;
968	+	}
969	+	}
970	+	return(1);
971	+	}
972	+
973	+
974	+	addblur()                               /* add to blurred picture */
975	+	{
976	+	COLOR   cval;
977	+	double  d;
978	+	register int    i;
979	+
980	+	if (!blurring)
981	+	return(0);
982	+	i = hresolu*vresolu;
983	+	if (nvavg < 2)
984	+	if (averaging)
985	+	while (i--) {
986	+	copycolor(ourbpict[i], ourspict[i]);
987	+	d = 1.0/ourweigh[i];
988	+	scalecolor(ourbpict[i], d);
989	+	}
990	+	else
991	+	while (i--)
992	+	colr_color(ourbpict[i], ourpict[i]);
993	+	else
994	+	if (averaging)
995	+	while (i--) {
996	+	copycolor(cval, ourspict[i]);
997	+	d = 1.0/ourweigh[i];
998	+	scalecolor(cval, d);
999	+	addcolor(ourbpict[i], cval);
1000	+	}
1001	+	else
1002	+	while (i--) {
1003	+	colr_color(cval, ourpict[i]);
1004	+	addcolor(ourbpict[i], cval);
1005	+	}
1006	+	/* print view */
1007	+	printf("VIEW%d:", nvavg);
1008	+	fprintview(&ourview, stdout);
1009	+	putchar('\n');
1010	+	return(1);
1011	+	}
1012	+
1013	+
1014	+	writepicture()                          /* write out picture (alters buffer) */
1015	+	{
1016		int     y;
1017	+	register int    x;
1018	+	double  d;
1019
1020	<	fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout);
1021	<	for (y = ourview.vresolu-1; y >= 0; y--)
1022	<	if (fwritecolrs(pscan(y), ourview.hresolu, stdout) < 0) {
1023	<	perror(progname);
1024	<	exit(1);
1020	>	fprtresolu(hresolu, vresolu, stdout);
1021	>	for (y = vresolu-1; y >= 0; y--)
1022	>	if (blurring) {
1023	>	for (x = 0; x < hresolu; x++) { /* compute avg. */
1024	>	d = rexpadj/nvavg;
1025	>	scalecolor(bscan(y)[x], d);
1026	>	}
1027	>	if (fwritescan(bscan(y), hresolu, stdout) < 0)
1028	>	syserror(progname);
1029	>	} else if (averaging) {
1030	>	for (x = 0; x < hresolu; x++) { /* average pixels */
1031	>	d = rexpadj/wscan(y)[x];
1032	>	scalecolor(sscan(y)[x], d);
1033	>	}
1034	>	if (fwritescan(sscan(y), hresolu, stdout) < 0)
1035	>	syserror(progname);
1036	>	} else {
1037	>	if (expadj)
1038	>	shiftcolrs(pscan(y), hresolu, expadj);
1039	>	if (fwritecolrs(pscan(y), hresolu, stdout) < 0)
1040	>	syserror(progname);
1041		}
1042	+	}
1043	+
1044	+
1045	+	writedistance(fname)                    /* write out z file (alters buffer) */
1046	+	char    *fname;
1047	+	{
1048	+	int     donorm = normdist & !zisnorm ? 1 :
1049	+	ourview.type == VT_PER & !normdist & zisnorm ? -1 : 0;
1050	+	int     fd;
1051	+	int     y;
1052	+
1053	+	if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1)
1054	+	syserror(fname);
1055	+	for (y = vresolu-1; y >= 0; y--) {
1056	+	if (donorm) {
1057	+	double  vx, yzn2, d;
1058	+	register int    x;
1059	+	yzn2 = (y+.5)/vresolu + ourview.voff - .5;
1060	+	yzn2 = 1. + yzn2*yzn2*ourview.vn2;
1061	+	for (x = 0; x < hresolu; x++) {
1062	+	vx = (x+.5)/hresolu + ourview.hoff - .5;
1063	+	d = sqrt(vx*vx*ourview.hn2 + yzn2);
1064	+	if (donorm > 0)
1065	+	zscan(y)[x] *= d;
1066	+	else
1067	+	zscan(y)[x] /= d;
1068	+	}
1069	+	}
1070	+	if (write(fd, (char *)zscan(y), hresolu*sizeof(float))
1071	+	< hresolu*sizeof(float))
1072	+	syserror(fname);
1073	+	}
1074	+	close(fd);
1075	+	}
1076	+
1077	+
1078	+	backfill(x, y)                          /* fill pixel with background */
1079	+	int     x, y;
1080	+	{
1081	+	if (averaging) {
1082	+	copycolor(sscan(y)[x], backcolor);
1083	+	wscan(y)[x] = 1;
1084	+	} else
1085	+	copycolr(pscan(y)[x], backcolr);
1086	+	zscan(y)[x] = backz;
1087	+	}
1088	+
1089	+
1090	+	calstart(prog, args)                    /* start fill calculation */
1091	+	char    *prog, *args;
1092	+	{
1093	+	char    combuf[512];
1094	+	char    *argv[64];
1095	+	int     rval;
1096	+	register char   **wp, *cp;
1097	+
1098	+	if (childpid != -1) {
1099	+	fprintf(stderr, "%s: too many calculations\n", progname);
1100	+	exit(1);
1101	+	}
1102	+	strcpy(combuf, prog);
1103	+	strcat(combuf, args);
1104	+	cp = combuf;
1105	+	wp = argv;
1106	+	for ( ; ; ) {
1107	+	while (isspace(*cp))    /* nullify spaces */
1108	+	*cp++ = '\0';
1109	+	if (!*cp)               /* all done? */
1110	+	break;
1111	+	*wp++ = cp;             /* add argument to list */
1112	+	while (*++cp && !isspace(*cp))
1113	+	;
1114	+	}
1115	+	*wp = NULL;
1116	+	/* start process */
1117	+	if ((rval = open_process(PDesc, argv)) < 0)
1118	+	syserror(progname);
1119	+	if (rval == 0) {
1120	+	fprintf(stderr, "%s: command not found\n", argv[0]);
1121	+	exit(1);
1122	+	}
1123	+	packsiz = rval/(6*sizeof(float)) - 1;
1124	+	if (packsiz > PACKSIZ)
1125	+	packsiz = PACKSIZ;
1126	+	queuesiz = 0;
1127	+	}
1128	+
1129	+
1130	+	caldone()                               /* done with calculation */
1131	+	{
1132	+	if (childpid == -1)
1133	+	return;
1134	+	clearqueue();
1135	+	close_process(PDesc);
1136	+	childpid = -1;
1137	+	}
1138	+
1139	+
1140	+	rcalfill(x, y)                          /* fill with ray-calculated pixel */
1141	+	int     x, y;
1142	+	{
1143	+	if (queuesiz >= packsiz)        /* flush queue if needed */
1144	+	clearqueue();
1145	+	/* add position to queue */
1146	+	queue[queuesiz][0] = x;
1147	+	queue[queuesiz][1] = y;
1148	+	queuesiz++;
1149	+	}
1150	+
1151	+
1152	+	clearqueue()                            /* process queue */
1153	+	{
1154	+	FVECT   orig, dir;
1155	+	float   fbuf[6*(PACKSIZ+1)];
1156	+	register float  *fbp;
1157	+	register int    i;
1158	+	double  vx, vy;
1159	+
1160	+	if (queuesiz == 0)
1161	+	return;
1162	+	fbp = fbuf;
1163	+	for (i = 0; i < queuesiz; i++) {
1164	+	viewray(orig, dir, &ourview,
1165	+	(queue[i][0]+.5)/hresolu,
1166	+	(queue[i][1]+.5)/vresolu);
1167	+	*fbp++ = orig[0]; *fbp++ = orig[1]; *fbp++ = orig[2];
1168	+	*fbp++ = dir[0]; *fbp++ = dir[1]; *fbp++ = dir[2];
1169	+	}
1170	+	/* mark end and get results */
1171	+	bzero((char *)fbp, 6*sizeof(float));
1172	+	if (process(PDesc, (char *)fbuf, (char *)fbuf,
1173	+	4*sizeof(float)*(queuesiz+1),
1174	+	6*sizeof(float)*(queuesiz+1)) !=
1175	+	4*sizeof(float)*(queuesiz+1)) {
1176	+	fprintf(stderr, "%s: error reading from rtrace process\n",
1177	+	progname);
1178	+	exit(1);
1179	+	}
1180	+	fbp = fbuf;
1181	+	for (i = 0; i < queuesiz; i++) {
1182	+	if (ourexp > 0 && ourexp != 1.0) {
1183	+	fbp[0] *= ourexp;
1184	+	fbp[1] *= ourexp;
1185	+	fbp[2] *= ourexp;
1186	+	}
1187	+	if (averaging) {
1188	+	setcolor(sscan(queue[i][1])[queue[i][0]],
1189	+	fbp[0], fbp[1], fbp[2]);
1190	+	wscan(queue[i][1])[queue[i][0]] = 1;
1191	+	} else
1192	+	setcolr(pscan(queue[i][1])[queue[i][0]],
1193	+	fbp[0], fbp[1], fbp[2]);
1194	+	if (zisnorm)
1195	+	zscan(queue[i][1])[queue[i][0]] = fbp[3];
1196	+	else {
1197	+	vx = (queue[i][0]+.5)/hresolu + ourview.hoff - .5;
1198	+	vy = (queue[i][1]+.5)/vresolu + ourview.voff - .5;
1199	+	zscan(queue[i][1])[queue[i][0]] = fbp[3] / sqrt(1. +
1200	+	vx*vx*ourview.hn2 + vy*vy*ourview.vn2);
1201	+	}
1202	+	fbp += 4;
1203	+	}
1204	+	queuesiz = 0;
1205	+	}
1206	+
1207	+
1208	+	syserror(s)                     /* report error and exit */
1209	+	char    *s;
1210	+	{
1211	+	perror(s);
1212	+	exit(1);
1213		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines