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

Comparing ray/src/px/pinterp.c (file contents):
Revision 2.2 by greg, Thu Dec 19 14:51:55 1991 UTC vs.
Revision 2.51 by greg, Mon Nov 20 21:44:29 2023 UTC

#	Line 1 | Line 1
1	–	/* Copyright (c) 1991 Regents of the University of California */
2	–
1		#ifndef lint
2	<	static char SCCSid[] = "$SunId$ LBL";
2	>	static const char       RCSid[] = "$Id$";
3		#endif
6	–
4		/*
5		* Interpolate and extrapolate pictures with different view parameters.
6		*
7		*      Greg Ward       09Dec89
8		*/
9
10	<	#include "standard.h"
10	>	#include "copyright.h"
11
12	<	#include <fcntl.h>
12	>	#include <ctype.h>
13	>	#include <string.h>
14
15	+	#include "platform.h"
16	+	#include "standard.h"
17	+	#include "rtprocess.h" /* Windows: must come before color.h */
18		#include "view.h"
18	–
19		#include "color.h"
20
21	<	#include "resolu.h"
21	>	#define LOG2            0.69314718055994530942
22
23	–	#ifndef BSD
24	–	#define vfork           fork
25	–	#endif
26	–
23		#define pscan(y)        (ourpict+(y)*hresolu)
24	+	#define sscan(y)        (ourspict+(y)*hresolu)
25	+	#define wscan(y)        (ourweigh+(y)*hresolu)
26		#define zscan(y)        (ourzbuf+(y)*hresolu)
27	+	#define bscan(y)        (ourbpict+(y)*hresolu)
28	+	#define averaging       (ourweigh != NULL)
29	+	#define blurring        (ourbpict != NULL)
30	+	#define usematrix       (hasmatrix & !averaging)
31	+	#define zisnorm         (!usematrix | (ourview.type != VT_PER))
32
33	+	#define MAXWT           1000.           /* maximum pixel weight (averaging) */
34	+
35		#define F_FORE          1               /* fill foreground */
36		#define F_BACK          2               /* fill background */
37
38	<	#define PACKSIZ         42              /* calculation packet size */
38	>	#define PACKSIZ         256             /* max. calculation packet size */
39
40	<	#define RTCOM           "rtrace -h -ovl -fff %s"
40	>	#define RTCOM           "rtrace -h- -ovl -fff -ld- -i- -I- "
41
42		#define ABS(x)          ((x)>0?(x):-(x))
43
44		struct position {int x,y; float z;};
45
46	+	#define NSTEPS          64              /* number steps in overlap prescan */
47	+	#define MINSTEP         4               /* minimum worthwhile preview step */
48	+
49	+	struct bound {int min,max;};
50	+
51		VIEW    ourview = STDVIEW;              /* desired view */
52		int     hresolu = 512;                  /* horizontal resolution */
53		int     vresolu = 512;                  /* vertical resolution */
#	Line 45 | Line 55 | double pixaspect = 1.0;                /* pixel aspect ratio */
55
56		double  zeps = .02;                     /* allowed z epsilon */
57
58	<	COLR    *ourpict;                       /* output picture */
58	>	COLR    *ourpict;                       /* output picture (COLR's) */
59	>	COLOR   *ourspict;                      /* output pixel sums (averaging) */
60	>	float   *ourweigh = NULL;               /* output pixel weights (averaging) */
61		float   *ourzbuf;                       /* corresponding z-buffer */
62	+	COLOR   *ourbpict = NULL;               /* blurred picture (view averaging) */
63
64	+	VIEW    avgview;                        /* average view for -B option */
65	+	int     nvavg;                          /* number of views averaged */
66	+
67		char    *progname;
68
69		int     fillo = F_FORE|F_BACK;          /* selected fill options */
70		int     fillsamp = 0;                   /* sample separation (0 == inf) */
55	–	extern int      backfill(), rcalfill(); /* fill functions */
56	–	int     (*fillfunc)() = backfill;       /* selected fill function */
71		COLR    backcolr = BLKCOLR;             /* background color */
72	+	COLOR   backcolor = BLKCOLOR;           /* background color (float) */
73		double  backz = 0.0;                    /* background z value */
74	<	int     normdist = 1;                   /* normalized distance? */
75	<	double  ourexp = -1;                    /* output picture exposure */
74	>	int     normdist = 1;                   /* i/o normalized distance? */
75	>	char    ourfmt[MAXFMTLEN] = PICFMT;     /* original picture format */
76	>	double  ourexp = -1;                    /* original picture exposure */
77	>	int     expadj = 0;                     /* exposure adjustment (f-stops) */
78	>	double  rexpadj = 1;                    /* real exposure adjustment */
79
80	<	VIEW    theirview = STDVIEW;            /* input view */
80	>	VIEW    theirview;                      /* input view */
81		int     gotview;                        /* got input view? */
82		int     wrongformat = 0;                /* input in another format? */
83		RESOLU  tresolu;                        /* input resolution */
84		double  theirexp;                       /* input picture exposure */
85	<	double  theirs2ours[4][4];              /* transformation matrix */
85	>	MAT4    theirs2ours;                    /* transformation matrix */
86		int     hasmatrix = 0;                  /* has transformation matrix */
87
88	<	int     childpid = -1;                  /* id of fill process */
89	<	FILE    *psend, *precv;                 /* pipes to/from fill calculation */
90	<	int     queue[PACKSIZ][2];              /* pending pixels */
91	<	int     queuesiz;                       /* number of pixels pending */
88	>	static SUBPROC PDesc = SP_INACTIVE; /* rtrace process descriptor */
89	>	unsigned short  queue[PACKSIZ][2];      /* pending pixels */
90	>	int     packsiz;                        /* actual packet size */
91	>	int     queuesiz = 0;                   /* number of pixels pending */
92
93	+	typedef void fillfunc_t(int x, int y);
94
95	<	main(argc, argv)                        /* interpolate pictures */
96	<	int     argc;
97	<	char    *argv[];
95	>	static gethfunc headline;
96	>	static int nextview(FILE *fp);
97	>	static void compavgview(void);
98	>	static void addpicture(char *pfile, char *zspec);
99	>	static int pixform(MAT4 xfmat, VIEW *vw1, VIEW *vw2);
100	>	static void addscanline(struct bound *xl, int y,
101	>	COLR *pline, float *zline, struct position *lasty);
102	>	static void addpixel(struct position *p0, struct position *p1,
103	>	struct position *p2, COLR pix, double w, double z);
104	>	static double movepixel(FVECT pos);
105	>	static int getperim(struct bound *xl, struct bound *yl, float *zline, int zfd);
106	>	static void backpicture(fillfunc_t *fill, int samp);
107	>	static void fillpicture(fillfunc_t *fill);
108	>	static int clipaft(void);
109	>	static int addblur(void);
110	>	static void writepicture(void);
111	>	static void writedistance(char *fname);
112	>	static fillfunc_t backfill;
113	>	static fillfunc_t rcalfill;
114	>	static void calstart(char *prog, char *args);
115	>	static void caldone(void);
116	>	static void clearqueue(void);
117	>	static void syserror(char *s);
118	>
119	>	fillfunc_t *fillfunc = backfill;        /* selected fill function */
120	>
121	>	int
122	>	main(                   /* interpolate pictures */
123	>	int     argc,
124	>	char    *argv[]
125	>	)
126		{
127	<	#define check(olen,narg)        if (argv[i][olen] || narg >= argc-i) goto badopt
127	>	#define  check(ol,al)           if (argv[an][ol] || \
128	>	badarg(argc-an-1,argv+an+1,al)) \
129	>	goto badopt
130		int     gotvfile = 0;
131	+	int     doavg = -1;
132	+	int     doblur = 0;
133		char    *zfile = NULL;
134	<	char    *err;
135	<	int     i, rval;
134	>	char    *expcomp = NULL;
135	>	int     i, an, rval;
136
137	+	SET_DEFAULT_BINARY();
138	+	SET_FILE_BINARY(stdout);
139	+
140		progname = argv[0];
141
142	<	for (i = 1; i < argc && argv[i][0] == '-'; i++) {
143	<	rval = getviewopt(&ourview, argc-i, argv+i);
142	>	for (an = 1; an < argc && argv[an][0] == '-'; an++) {
143	>	rval = getviewopt(&ourview, argc-an, argv+an);
144		if (rval >= 0) {
145	<	i += rval;
145	>	an += rval;
146		continue;
147		}
148	<	switch (argv[i][1]) {
148	>	switch (argv[an][1]) {
149	>	case 'e':                               /* exposure */
150	>	check(2,"f");
151	>	expcomp = argv[++an];
152	>	break;
153		case 't':                               /* threshold */
154	<	check(2,1);
155	<	zeps = atof(argv[++i]);
154	>	check(2,"f");
155	>	zeps = atof(argv[++an]);
156		break;
157	+	case 'a':                               /* average */
158	+	check(2,NULL);
159	+	doavg = 1;
160	+	break;
161	+	case 'B':                               /* blur views */
162	+	check(2,NULL);
163	+	doblur = 1;
164	+	break;
165	+	case 'q':                               /* quick (no avg.) */
166	+	check(2,NULL);
167	+	doavg = 0;
168	+	break;
169		case 'n':                               /* dist. normalized? */
170	<	check(2,0);
170	>	check(2,NULL);
171		normdist = !normdist;
172		break;
173		case 'f':                               /* fill type */
174	<	switch (argv[i][2]) {
174	>	switch (argv[an][2]) {
175		case '0':                               /* none */
176	<	check(3,0);
176	>	check(3,NULL);
177		fillo = 0;
178		break;
179		case 'f':                               /* foreground */
180	<	check(3,0);
180	>	check(3,NULL);
181		fillo = F_FORE;
182		break;
183		case 'b':                               /* background */
184	<	check(3,0);
184	>	check(3,NULL);
185		fillo = F_BACK;
186		break;
187		case 'a':                               /* all */
188	<	check(3,0);
188	>	check(3,NULL);
189		fillo = F_FORE|F_BACK;
190		break;
191		case 's':                               /* sample */
192	<	check(3,1);
193	<	fillsamp = atoi(argv[++i]);
192	>	check(3,"i");
193	>	fillsamp = atoi(argv[++an]);
194		break;
195		case 'c':                               /* color */
196	<	check(3,3);
196	>	check(3,"fff");
197		fillfunc = backfill;
198	<	setcolr(backcolr, atof(argv[i+1]),
199	<	atof(argv[i+2]), atof(argv[i+3]));
200	<	i += 3;
198	>	setcolor(backcolor, atof(argv[an+1]),
199	>	atof(argv[an+2]), atof(argv[an+3]));
200	>	setcolr(backcolr, colval(backcolor,RED),
201	>	colval(backcolor,GRN),
202	>	colval(backcolor,BLU));
203	>	an += 3;
204		break;
205		case 'z':                               /* z value */
206	<	check(3,1);
206	>	check(3,"f");
207		fillfunc = backfill;
208	<	backz = atof(argv[++i]);
208	>	backz = atof(argv[++an]);
209		break;
210		case 'r':                               /* rtrace */
211	<	check(3,1);
211	>	check(3,"s");
212		fillfunc = rcalfill;
213	<	calstart(RTCOM, argv[++i]);
213	>	calstart(RTCOM, argv[++an]);
214		break;
215		default:
216		goto badopt;
217		}
218		break;
219		case 'z':                               /* z file */
220	<	check(2,1);
221	<	zfile = argv[++i];
220	>	check(2,"s");
221	>	zfile = argv[++an];
222		break;
223		case 'x':                               /* x resolution */
224	<	check(2,1);
225	<	hresolu = atoi(argv[++i]);
224	>	check(2,"i");
225	>	hresolu = atoi(argv[++an]);
226		break;
227		case 'y':                               /* y resolution */
228	<	check(2,1);
229	<	vresolu = atoi(argv[++i]);
228	>	check(2,"i");
229	>	vresolu = atoi(argv[++an]);
230		break;
231		case 'p':                               /* pixel aspect */
232	<	check(2,1);
233	<	pixaspect = atof(argv[++i]);
232	>	if (argv[an][2] != 'a')
233	>	goto badopt;
234	>	check(3,"f");
235	>	pixaspect = atof(argv[++an]);
236		break;
237		case 'v':                               /* view file */
238	<	if (argv[i][2] != 'f')
238	>	if (argv[an][2] != 'f')
239		goto badopt;
240	<	check(3,1);
241	<	gotvfile = viewfile(argv[++i], &ourview, 0, 0);
242	<	if (gotvfile < 0) {
243	<	perror(argv[i]);
244	<	exit(1);
170	<	} else if (gotvfile == 0) {
240	>	check(3,"s");
241	>	gotvfile = viewfile(argv[++an], &ourview, NULL);
242	>	if (gotvfile < 0)
243	>	syserror(argv[an]);
244	>	else if (gotvfile == 0) {
245		fprintf(stderr, "%s: bad view file\n",
246	<	argv[i]);
246	>	argv[an]);
247		exit(1);
248		}
249		break;
250		default:
251		badopt:
252		fprintf(stderr, "%s: command line error at '%s'\n",
253	<	progname, argv[i]);
253	>	progname, argv[an]);
254		goto userr;
255		}
256		}
257		/* check arguments */
258	<	if ((argc-i)%2)
258	>	if ((argc-an)%2)
259		goto userr;
260	+	if (fillsamp == 1)
261	+	fillo &= ~F_BACK;
262	+	if (doavg < 0)
263	+	doavg = (argc-an) > 2;
264	+	if (expcomp != NULL) {
265	+	if ((expcomp[0] == '+') | (expcomp[0] == '-')) {
266	+	expadj = atof(expcomp) + (expcomp[0]=='+' ? .5 : -.5);
267	+	if (doavg | doblur)
268	+	rexpadj = pow(2.0, atof(expcomp));
269	+	else
270	+	rexpadj = pow(2.0, (double)expadj);
271	+	} else {
272	+	if (!isflt(expcomp))
273	+	goto userr;
274	+	rexpadj = atof(expcomp);
275	+	expadj = log(rexpadj)/LOG2 + (rexpadj>1 ? .5 : -.5);
276	+	if (!(doavg | doblur))
277	+	rexpadj = pow(2.0, (double)expadj);
278	+	}
279	+	}
280		/* set view */
281	<	if (err = setview(&ourview)) {
282	<	fprintf(stderr, "%s: %s\n", progname, err);
281	>	if (nextview(doblur ? stdin : (FILE *)NULL) == EOF) {
282	>	fprintf(stderr, "%s: no view on standard input!\n",
283	>	progname);
284		exit(1);
285		}
286		normaspect(viewaspect(&ourview), &pixaspect, &hresolu, &vresolu);
287		/* allocate frame */
288	<	ourpict = (COLR *)malloc(hresolu*vresolu*sizeof(COLR));
289	<	ourzbuf = (float *)calloc(hresolu*vresolu,sizeof(float));
290	<	if (ourpict == NULL || ourzbuf == NULL)
291	<	syserror();
292	<	/* get input */
293	<	for ( ; i < argc; i += 2)
294	<	addpicture(argv[i], argv[i+1]);
295	<	/* fill in spaces */
296	<	if (fillo&F_BACK)
297	<	backpicture(fillfunc, fillsamp);
298	<	else
299	<	fillpicture(fillfunc);
288	>	if (doavg) {
289	>	ourspict = (COLOR *)bmalloc(hresolu*vresolu*sizeof(COLOR));
290	>	ourweigh = (float *)bmalloc(hresolu*vresolu*sizeof(float));
291	>	if ((ourspict == NULL) | (ourweigh == NULL))
292	>	syserror(progname);
293	>	} else {
294	>	ourpict = (COLR *)bmalloc(hresolu*vresolu*sizeof(COLR));
295	>	if (ourpict == NULL)
296	>	syserror(progname);
297	>	}
298	>	if (doblur) {
299	>	ourbpict = (COLOR *)bmalloc(hresolu*vresolu*sizeof(COLOR));
300	>	if (ourbpict == NULL)
301	>	syserror(progname);
302	>	}
303	>	ourzbuf = (float *)bmalloc(hresolu*vresolu*sizeof(float));
304	>	if (ourzbuf == NULL)
305	>	syserror(progname);
306	>	/* new header */
307	>	newheader("RADIANCE", stdout);
308	>	fputnow(stdout);
309	>	/* run pictures */
310	>	do {
311	>	memset((char *)ourzbuf, '\0', hresolu*vresolu*sizeof(float));
312	>	for (i = an; i < argc; i += 2)
313	>	addpicture(argv[i], argv[i+1]);
314	>	if (fillo&F_BACK)                       /* fill in spaces */
315	>	backpicture(fillfunc, fillsamp);
316	>	else
317	>	fillpicture(fillfunc);
318	>	/* aft clipping */
319	>	clipaft();
320	>	} while (addblur() && nextview(stdin) != EOF);
321		/* close calculation */
322		caldone();
323		/* add to header */
324		printargs(argc, argv, stdout);
325	<	if (gotvfile) {
325	>	compavgview();
326	>	if (doblur | gotvfile) {
327		fputs(VIEWSTR, stdout);
328	<	fprintview(&ourview, stdout);
328	>	fprintview(&avgview, stdout);
329		putc('\n', stdout);
330		}
331	<	if (pixaspect < .99 || pixaspect > 1.01)
331	>	if ((pixaspect < .99) | (pixaspect > 1.01))
332		fputaspect(pixaspect, stdout);
333	<	if (ourexp > 0 && (ourexp < .995 || ourexp > 1.005))
333	>	if (ourexp > 0)
334	>	ourexp *= rexpadj;
335	>	else
336	>	ourexp = rexpadj;
337	>	if ((ourexp < .995) | (ourexp > 1.005))
338		fputexpos(ourexp, stdout);
339	<	fputformat(COLRFMT, stdout);
339	>	if (strcmp(ourfmt, PICFMT))             /* print format if known */
340	>	fputformat(ourfmt, stdout);
341		putc('\n', stdout);
342		/* write picture */
343		writepicture();
#	Line 226 | Line 348 | char   *argv[];
348		exit(0);
349		userr:
350		fprintf(stderr,
351	<	"Usage: %s [view opts][-t eps][-z zout][-fT][-n] pfile zspec ..\n",
351	>	"Usage: %s [view opts][-t eps][-z zout][-e spec][-B][-a|-q][-fT][-n] pfile zspec ..\n",
352		progname);
353		exit(1);
354		#undef check
355		}
356
357
358	<	headline(s)                             /* process header string */
359	<	char    *s;
358	>	static int
359	>	headline(                               /* process header string */
360	>	char    *s,
361	>	void    *p
362	>	)
363		{
364	<	static char     *altname[] = {VIEWSTR,"rpict","rview","pinterp",NULL};
240	<	register char   **an;
241	<	char    fmt[32];
364	>	char    fmt[MAXFMTLEN];
365
366	<	if (isformat(s)) {
367	<	formatval(fmt, s);
368	<	wrongformat = strcmp(fmt, COLRFMT);
369	<	return;
366	>	if (isheadid(s))
367	>	return(0);
368	>	if (formatval(fmt, s)) {
369	>	if (globmatch(ourfmt, fmt)) {
370	>	wrongformat = 0;
371	>	strcpy(ourfmt, fmt);
372	>	} else
373	>	wrongformat = 1;
374	>	return(0);
375		}
376	<	putc('\t', stdout);
377	<	fputs(s, stdout);
378	<
376	>	if (nvavg < 2) {
377	>	putc('\t', stdout);
378	>	fputs(s, stdout);
379	>	}
380		if (isexpos(s)) {
381		theirexp *= exposval(s);
382	+	return(0);
383	+	}
384	+	if (isview(s) && sscanview(&theirview, s) > 0)
385	+	gotview++;
386	+	return(0);
387	+	}
388	+
389	+
390	+	static int
391	+	nextview(                               /* get and set next view */
392	+	FILE    *fp
393	+	)
394	+	{
395	+	char    linebuf[256];
396	+	char    *err;
397	+	int     i;
398	+
399	+	if (fp != NULL) {
400	+	do                      /* get new view */
401	+	if (fgets(linebuf, sizeof(linebuf), fp) == NULL)
402	+	return(EOF);
403	+	while (!isview(linebuf) || !sscanview(&ourview, linebuf));
404	+	}
405	+	/* set new view */
406	+	if ((err = setview(&ourview)) != NULL) {
407	+	fprintf(stderr, "%s: %s\n", progname, err);
408	+	exit(1);
409	+	}
410	+	if (!nvavg) {                   /* first view */
411	+	avgview = ourview;
412	+	return(nvavg++);
413	+	}
414	+	/* add to average view */
415	+	for (i = 0; i < 3; i++) {
416	+	avgview.vp[i] += ourview.vp[i];
417	+	avgview.vdir[i] += ourview.vdir[i];
418	+	avgview.vup[i] += ourview.vup[i];
419	+	}
420	+	avgview.vdist += ourview.vdist;
421	+	avgview.horiz += ourview.horiz;
422	+	avgview.vert += ourview.vert;
423	+	avgview.hoff += ourview.hoff;
424	+	avgview.voff += ourview.voff;
425	+	avgview.vfore += ourview.vfore;
426	+	avgview.vaft += ourview.vaft;
427	+	return(nvavg++);
428	+	}
429	+
430	+
431	+	static void
432	+	compavgview(void)                               /* compute average view */
433	+	{
434	+	int     i;
435	+	double  f;
436	+
437	+	if (nvavg < 2)
438		return;
439	+	f = 1.0/nvavg;
440	+	for (i = 0; i < 3; i++) {
441	+	avgview.vp[i] *= f;
442	+	avgview.vdir[i] *= f;
443	+	avgview.vup[i] *= f;
444		}
445	<	for (an = altname; *an != NULL; an++)
446	<	if (!strncmp(*an, s, strlen(*an))) {
447	<	if (sscanview(&theirview, s+strlen(*an)) > 0)
448	<	gotview++;
449	<	break;
450	<	}
445	>	avgview.vdist *= f;
446	>	avgview.horiz *= f;
447	>	avgview.vert *= f;
448	>	avgview.hoff *= f;
449	>	avgview.voff *= f;
450	>	avgview.vfore *= f;
451	>	avgview.vaft *= f;
452	>	if (setview(&avgview) != NULL)          /* in case of emergency... */
453	>	avgview = ourview;
454	>	pixaspect = viewaspect(&avgview) * hresolu / vresolu;
455		}
456
457
458	<	addpicture(pfile, zspec)                /* add picture to output */
459	<	char    *pfile, *zspec;
458	>	static void
459	>	addpicture(             /* add picture to output */
460	>	char    *pfile,
461	>	char    *zspec
462	>	)
463		{
464		FILE    *pfp;
465		int     zfd;
#	Line 270 | Line 467 | char   *pfile, *zspec;
467		COLR    *scanin;
468		float   *zin;
469		struct position *plast;
470	+	struct bound    *xlim, ylim;
471		int     y;
472		/* open picture file */
473	<	if ((pfp = fopen(pfile, "r")) == NULL) {
474	<	perror(pfile);
277	<	exit(1);
278	<	}
473	>	if ((pfp = fopen(pfile, "r")) == NULL)
474	>	syserror(pfile);
475		/* get header with exposure and view */
476		theirexp = 1.0;
477	+	theirview = stdview;
478		gotview = 0;
479	<	printf("%s:\n", pfile);
479	>	if (nvavg < 2)
480	>	printf("%s:\n", pfile);
481		getheader(pfp, headline, NULL);
482		if (wrongformat || !gotview || !fgetsresolu(&tresolu, pfp)) {
483		fprintf(stderr, "%s: picture format error\n", pfile);
#	Line 289 | Line 487 | char   *pfile, *zspec;
487		ourexp = theirexp;
488		else if (ABS(theirexp-ourexp) > .01*ourexp)
489		fprintf(stderr, "%s: different exposure (warning)\n", pfile);
490	<	if (err = setview(&theirview)) {
490	>	if ( (err = setview(&theirview)) ) {
491		fprintf(stderr, "%s: %s\n", pfile, err);
492		exit(1);
493		}
494		/* compute transformation */
495		hasmatrix = pixform(theirs2ours, &theirview, &ourview);
298	–	/* allocate scanlines */
299	–	scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR));
300	–	zin = (float *)malloc(scanlen(&tresolu)*sizeof(float));
301	–	plast = (struct position *)calloc(scanlen(&tresolu),
302	–	sizeof(struct position));
303	–	if (scanin == NULL || zin == NULL || plast == NULL)
304	–	syserror();
496		/* get z specification or file */
497	<	if ((zfd = open(zspec, O_RDONLY)) == -1) {
498	<	double  zvalue;
499	<	register int    x;
500	<	if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0) {
501	<	perror(zspec);
497	>	zin = (float *)malloc(scanlen(&tresolu)*sizeof(float));
498	>	if (zin == NULL)
499	>	syserror(progname);
500	>	if (isflt(zspec)) {             /* depth is a constant? */
501	>	double  zvalue = atof(zspec);
502	>	int     x;
503	>	if (zvalue <= 0.0) {
504	>	fprintf(stderr, "%s: illegal Z-value %s\n",
505	>	progname, zspec);
506		exit(1);
507		}
508		for (x = scanlen(&tresolu); x-- > 0; )
509		zin[x] = zvalue;
510	+	zfd = -1;
511	+	} else if ((zfd = open_float_depth(zspec, (long)tresolu.xr*tresolu.yr)) < 0)
512	+	exit(1);
513	+	/* compute transferrable perimeter */
514	+	xlim = (struct bound *)malloc(numscans(&tresolu)*sizeof(struct bound));
515	+	if (xlim == NULL)
516	+	syserror(progname);
517	+	if (!getperim(xlim, &ylim, zin, zfd)) { /* overlapping area? */
518	+	free((void *)zin);
519	+	free((void *)xlim);
520	+	if (zfd != -1)
521	+	close(zfd);
522	+	fclose(pfp);
523	+	return;
524		}
525	<	/* load image */
526	<	for (y = 0; y < numscans(&tresolu); y++) {
525	>	/* allocate scanlines */
526	>	scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR));
527	>	plast = (struct position *)calloc(scanlen(&tresolu),
528	>	sizeof(struct position));
529	>	if ((scanin == NULL) | (plast == NULL))
530	>	syserror(progname);
531	>	/* skip to starting point */
532	>	for (y = 0; y < ylim.min; y++)
533		if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) {
534		fprintf(stderr, "%s: read error\n", pfile);
535		exit(1);
536		}
537	<	if (zfd != -1 && read(zfd,(char *)zin,
538	<	scanlen(&tresolu)*sizeof(float))
539	<	< scanlen(&tresolu)*sizeof(float)) {
540	<	fprintf(stderr, "%s: read error\n", zspec);
537	>	if (zfd != -1 && lseek(zfd,
538	>	(off_t)ylim.min*scanlen(&tresolu)*sizeof(float),
539	>	SEEK_SET) < 0)
540	>	syserror(zspec);
541	>	/* load image */
542	>	for (y = ylim.min; y <= ylim.max; y++) {
543	>	if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) {
544	>	fprintf(stderr, "%s: read error\n", pfile);
545		exit(1);
546		}
547	<	addscanline(y, scanin, zin, plast);
547	>	if (zfd != -1 && read(zfd, (char *)zin,
548	>	scanlen(&tresolu)*sizeof(float))
549	>	< scanlen(&tresolu)*sizeof(float))
550	>	syserror(zspec);
551	>	addscanline(xlim+y, y, scanin, zin, plast);
552		}
553		/* clean up */
554	<	free((char *)scanin);
555	<	free((char *)zin);
556	<	free((char *)plast);
554	>	free((void *)xlim);
555	>	free((void *)scanin);
556	>	free((void *)zin);
557	>	free((void *)plast);
558		fclose(pfp);
559		if (zfd != -1)
560		close(zfd);
561		}
562
563
564	<	pixform(xfmat, vw1, vw2)                /* compute view1 to view2 matrix */
565	<	register double xfmat[4][4];
566	<	register VIEW   *vw1, *vw2;
564	>	static int
565	>	pixform(                /* compute view1 to view2 matrix */
566	>	MAT4    xfmat,
567	>	VIEW    *vw1,
568	>	VIEW    *vw2
569	>	)
570		{
571	<	double  m4t[4][4];
571	>	MAT4    m4t;
572
573	<	if (vw1->type != VT_PER && vw1->type != VT_PAR)
573	>	if ((vw1->type != VT_PER) & (vw1->type != VT_PAR))
574		return(0);
575	<	if (vw2->type != VT_PER && vw2->type != VT_PAR)
575	>	if ((vw2->type != VT_PER) & (vw2->type != VT_PAR))
576		return(0);
577		setident4(xfmat);
578		xfmat[0][0] = vw1->hvec[0];
#	Line 378 | Line 605 | register VIEW  *vw1, *vw2;
605		}
606
607
608	<	addscanline(y, pline, zline, lasty)     /* add scanline to output */
609	<	int     y;
610	<	COLR    *pline;
611	<	float   *zline;
612	<	struct position *lasty;         /* input/output */
608	>	static void
609	>	addscanline(    /* add scanline to output */
610	>	struct bound    *xl,
611	>	int     y,
612	>	COLR    *pline,
613	>	float   *zline,
614	>	struct position *lasty          /* input/output */
615	>	)
616		{
387	–	extern double   sqrt();
617		FVECT   pos;
618		struct position lastx, newpos;
619	<	register int    x;
619	>	double  wt;
620	>	int     x;
621
622		lastx.z = 0;
623	<	for (x = scanlen(&tresolu); x-- > 0; ) {
623	>	for (x = xl->max; x >= xl->min; x--) {
624		pix2loc(pos, &tresolu, x, y);
625		pos[2] = zline[x];
626	<	if (movepixel(pos) < 0) {
626	>	if ((wt = movepixel(pos)) <= FTINY) {
627		lasty[x].z = lastx.z = 0;       /* mark invalid */
628		continue;
629		}
630	+	/* add pixel to our image */
631		newpos.x = pos[0] * hresolu;
632		newpos.y = pos[1] * vresolu;
633		newpos.z = zline[x];
634	<	/* add pixel to our image */
635	<	if (pos[0] >= 0 && newpos.x < hresolu
636	<	&& pos[1] >= 0 && newpos.y < vresolu) {
637	<	addpixel(&newpos, &lastx, &lasty[x], pline[x], pos[2]);
407	<	lasty[x].x = lastx.x = newpos.x;
408	<	lasty[x].y = lastx.y = newpos.y;
409	<	lasty[x].z = lastx.z = newpos.z;
410	<	} else
411	<	lasty[x].z = lastx.z = 0;       /* mark invalid */
634	>	addpixel(&newpos, &lastx, &lasty[x], pline[x], wt, pos[2]);
635	>	lasty[x].x = lastx.x = newpos.x;
636	>	lasty[x].y = lastx.y = newpos.y;
637	>	lasty[x].z = lastx.z = newpos.z;
638		}
639		}
640
641
642	<	addpixel(p0, p1, p2, pix, z)            /* fill in pixel parallelogram */
643	<	struct position *p0, *p1, *p2;
644	<	COLR    pix;
645	<	double  z;
642	>	static void
643	>	addpixel(               /* fill in pixel parallelogram */
644	>	struct position *p0,
645	>	struct position *p1,
646	>	struct position *p2,
647	>	COLR    pix,
648	>	double  w,
649	>	double  z
650	>	)
651		{
652		double  zt = 2.*zeps*p0->z;             /* threshold */
653	+	COLOR   pval;                           /* converted+weighted pixel */
654		int     s1x, s1y, s2x, s2y;             /* step sizes */
655		int     l1, l2, c1, c2;                 /* side lengths and counters */
656		int     p1isy;                          /* p0p1 along y? */
657		int     x1, y1;                         /* p1 position */
658	<	register int    x, y;                   /* final position */
658	>	int     x, y;                   /* final position */
659
660		/* compute vector p0p1 */
661		if (fillo&F_FORE && ABS(p1->z-p0->z) <= zt) {
662		s1x = p1->x - p0->x;
663		s1y = p1->y - p0->y;
664		l1 = ABS(s1x);
665	<	if (p1isy = (ABS(s1y) > l1))
665	>	if ( (p1isy = (ABS(s1y) > l1)) )
666		l1 = ABS(s1y);
667	+	else if (l1 < 1)
668	+	l1 = 1;
669		} else {
670		l1 = s1x = s1y = 1;
671		p1isy = -1;
#	Line 447 | Line 681 | double z;
681		if (p1isy != 0 && ABS(s2x) > l2)
682		l2 = ABS(s2x);
683		}
684	+	if (l2 < 1)
685	+	l2 = 1;
686		} else
687		l2 = s2x = s2y = 1;
688		/* fill the parallelogram */
689	+	if (averaging) {
690	+	colr_color(pval, pix);
691	+	scalecolor(pval, w);
692	+	}
693		for (c1 = l1; c1-- > 0; ) {
694		x1 = p0->x + c1*s1x/l1;
695		y1 = p0->y + c1*s1y/l1;
696		for (c2 = l2; c2-- > 0; ) {
697		x = x1 + c2*s2x/l2;
698	<	if (x < 0 || x >= hresolu)
698	>	if ((x < 0) | (x >= hresolu))
699		continue;
700		y = y1 + c2*s2y/l2;
701	<	if (y < 0 || y >= vresolu)
701	>	if ((y < 0) | (y >= vresolu))
702		continue;
703	<	if (zscan(y)[x] <= 0 || zscan(y)[x]-z
703	>	if (averaging) {
704	>	if (zscan(y)[x] <= 0 || zscan(y)[x]-z
705		> zeps*zscan(y)[x]) {
706	<	zscan(y)[x] = z;
706	>	copycolor(sscan(y)[x], pval);
707	>	wscan(y)[x] = w;
708	>	zscan(y)[x] = z;
709	>	} else if (z-zscan(y)[x] <= zeps*zscan(y)[x]) {
710	>	addcolor(sscan(y)[x], pval);
711	>	wscan(y)[x] += w;
712	>	}
713	>	} else if (zscan(y)[x] <= 0 || zscan(y)[x]-z
714	>	> zeps*zscan(y)[x]) {
715		copycolr(pscan(y)[x], pix);
716	+	zscan(y)[x] = z;
717		}
718		}
719		}
720		}
721
722
723	<	movepixel(pos)                          /* reposition image point */
724	<	FVECT   pos;
723	>	static double
724	>	movepixel(                              /* reposition image point */
725	>	FVECT   pos
726	>	)
727		{
728	<	FVECT   pt, direc;
728	>	FVECT   pt, tdir, odir;
729	>	double  d;
730
731		if (pos[2] <= 0)                /* empty pixel */
732	<	return(-1);
733	<	if (hasmatrix) {
732	>	return(0);
733	>	if (usematrix) {
734		pos[0] += theirview.hoff - .5;
735		pos[1] += theirview.voff - .5;
736	+	if (normdist & (theirview.type == VT_PER))
737	+	d = sqrt(1. + pos[0]*pos[0]*theirview.hn2
738	+	+ pos[1]*pos[1]*theirview.vn2);
739	+	else
740	+	d = 1.;
741	+	pos[2] += d*theirview.vfore;
742		if (theirview.type == VT_PER) {
743	<	if (normdist)   /* adjust for eye-ray distance */
485	<	pos[2] /= sqrt( 1.
486	<	+ pos[0]*pos[0]*theirview.hn2
487	<	+ pos[1]*pos[1]*theirview.vn2 );
743	>	pos[2] /= d;
744		pos[0] *= pos[2];
745		pos[1] *= pos[2];
746		}
747		multp3(pos, pos, theirs2ours);
748	<	if (pos[2] <= 0)
749	<	return(-1);
748	>	if (pos[2] <= ourview.vfore)
749	>	return(0);
750		if (ourview.type == VT_PER) {
751		pos[0] /= pos[2];
752		pos[1] /= pos[2];
753		}
754		pos[0] += .5 - ourview.hoff;
755		pos[1] += .5 - ourview.voff;
756	<	return(0);
756	>	if ((pos[0] < 0) | (pos[0] >= 1-FTINY) |
757	>	(pos[1] < 0) | (pos[1] >= 1-FTINY))
758	>	return(0);
759	>	pos[2] -= ourview.vfore;
760	>	} else {
761	>	if (viewray(pt, tdir, &theirview, pos[0], pos[1]) < -FTINY)
762	>	return(0);
763	>	if (!normdist & (theirview.type == VT_PER))     /* adjust */
764	>	pos[2] /= DOT(theirview.vdir, tdir);
765	>	pt[0] += tdir[0]*pos[2];
766	>	pt[1] += tdir[1]*pos[2];
767	>	pt[2] += tdir[2]*pos[2];
768	>	if (viewloc(pos, &ourview, pt) != VL_GOOD)
769	>	return(0);
770		}
771	<	if (viewray(pt, direc, &theirview, pos[0], pos[1]) < 0)
772	<	return(-1);
773	<	pt[0] += direc[0]*pos[2];
774	<	pt[1] += direc[1]*pos[2];
775	<	pt[2] += direc[2]*pos[2];
776	<	viewloc(pos, &ourview, pt);
777	<	if (pos[2] <= 0)
778	<	return(-1);
779	<	return(0);
771	>	if (!averaging)
772	>	return(1);
773	>	/* compute pixel weight */
774	>	if (ourview.type == VT_PAR) {
775	>	d = DOT(ourview.vdir,tdir);
776	>	d = 1. - d*d;
777	>	} else {
778	>	VSUB(odir, pt, ourview.vp);
779	>	d = DOT(odir,tdir);
780	>	d = 1. - d*d/DOT(odir,odir);
781	>	}
782	>	if (d <= 1./MAXWT/MAXWT)
783	>	return(MAXWT);          /* clip to maximum weight */
784	>	return(1./sqrt(d));
785		}
786
787
788	<	backpicture(fill, samp)                 /* background fill algorithm */
789	<	int     (*fill)();
790	<	int     samp;
788	>	static int
789	>	getperim(               /* compute overlapping image area */
790	>	struct bound    *xl,
791	>	struct bound    *yl,
792	>	float   *zline,
793	>	int     zfd
794	>	)
795		{
796	+	int     step;
797	+	FVECT   pos;
798	+	int     x, y;
799	+	/* set up step size */
800	+	if (scanlen(&tresolu) < numscans(&tresolu))
801	+	step = scanlen(&tresolu)/NSTEPS;
802	+	else
803	+	step = numscans(&tresolu)/NSTEPS;
804	+	if (step < MINSTEP) {                   /* not worth cropping? */
805	+	yl->min = 0;
806	+	yl->max = numscans(&tresolu) - 1;
807	+	x = scanlen(&tresolu) - 1;
808	+	for (y = numscans(&tresolu); y--; ) {
809	+	xl[y].min = 0;
810	+	xl[y].max = x;
811	+	}
812	+	return(1);
813	+	}
814	+	yl->min = 32000; yl->max = 0;           /* search for points on image */
815	+	for (y = step - 1; y < numscans(&tresolu); y += step) {
816	+	if (zfd != -1) {
817	+	if (lseek(zfd, (off_t)y*scanlen(&tresolu)*sizeof(float),
818	+	SEEK_SET) < 0)
819	+	syserror("lseek");
820	+	if (read(zfd, (char *)zline,
821	+	scanlen(&tresolu)*sizeof(float))
822	+	< scanlen(&tresolu)*sizeof(float))
823	+	syserror("read");
824	+	}
825	+	xl[y].min = 32000; xl[y].max = 0;               /* x max */
826	+	for (x = scanlen(&tresolu); (x -= step) > 0; ) {
827	+	pix2loc(pos, &tresolu, x, y);
828	+	pos[2] = zline[x];
829	+	if (movepixel(pos) > FTINY) {
830	+	xl[y].max = x + step - 1;
831	+	xl[y].min = x - step + 1;       /* x min */
832	+	if (xl[y].min < 0)
833	+	xl[y].min = 0;
834	+	for (x = step - 1; x < xl[y].max; x += step) {
835	+	pix2loc(pos, &tresolu, x, y);
836	+	pos[2] = zline[x];
837	+	if (movepixel(pos) > FTINY) {
838	+	xl[y].min = x - step + 1;
839	+	break;
840	+	}
841	+	}
842	+	if (y < yl->min)                /* y limits */
843	+	yl->min = y - step + 1;
844	+	yl->max = y + step - 1;
845	+	break;
846	+	}
847	+	}
848	+	/* fill in between */
849	+	if (y < step) {
850	+	xl[y-1].min = xl[y].min;
851	+	xl[y-1].max = xl[y].max;
852	+	} else {
853	+	if (xl[y].min < xl[y-step].min)
854	+	xl[y-1].min = xl[y].min;
855	+	else
856	+	xl[y-1].min = xl[y-step].min;
857	+	if (xl[y].max > xl[y-step].max)
858	+	xl[y-1].max = xl[y].max;
859	+	else
860	+	xl[y-1].max = xl[y-step].max;
861	+	}
862	+	for (x = 2; x < step; x++)
863	+	*(xl+y-x) = *(xl+y-1);
864	+	}
865	+	if (yl->max >= numscans(&tresolu))
866	+	yl->max = numscans(&tresolu) - 1;
867	+	y -= step;
868	+	for (x = numscans(&tresolu) - 1; x > y; x--)    /* fill bottom rows */
869	+	*(xl+x) = *(xl+y);
870	+	return(yl->max >= yl->min);
871	+	}
872	+
873	+
874	+	static void
875	+	backpicture(                    /* background fill algorithm */
876	+	fillfunc_t *fill,
877	+	int     samp
878	+	)
879	+	{
880		int     *yback, xback;
881		int     y;
882	<	register int    x, i;
882	>	int     x, i;
883		/* get back buffer */
884		yback = (int *)malloc(hresolu*sizeof(int));
885		if (yback == NULL)
886	<	syserror();
886	>	syserror(progname);
887		for (x = 0; x < hresolu; x++)
888		yback[x] = -2;
889		/*
#	Line 581 | Line 943 | int    samp;
943		< zscan(y)[xback] ) ) {
944		if (samp > 0 && ABS(x-xback) >= samp)
945		goto fillit;
946	<	copycolr(pscan(y)[x],pscan(y)[xback]);
946	>	if (averaging) {
947	>	copycolor(sscan(y)[x],
948	>	sscan(y)[xback]);
949	>	wscan(y)[x] = wscan(y)[xback];
950	>	} else
951	>	copycolr(pscan(y)[x],
952	>	pscan(y)[xback]);
953		zscan(y)[x] = zscan(y)[xback];
954		} else {
955		if (samp > 0 && ABS(y-yback[x]) > samp)
956		goto fillit;
957	<	copycolr(pscan(y)[x],pscan(yback[x])[x]);
957	>	if (averaging) {
958	>	copycolor(sscan(y)[x],
959	>	sscan(yback[x])[x]);
960	>	wscan(y)[x] =
961	>	wscan(yback[x])[x];
962	>	} else
963	>	copycolr(pscan(y)[x],
964	>	pscan(yback[x])[x]);
965		zscan(y)[x] = zscan(yback[x])[x];
966		}
967		continue;
#	Line 602 | Line 977 | int    samp;
977		xback = -2;
978		}
979		}
980	<	free((char *)yback);
980	>	free((void *)yback);
981		}
982
983
984	<	fillpicture(fill)               /* paint in empty pixels using fill */
985	<	int     (*fill)();
984	>	static void
985	>	fillpicture(            /* paint in empty pixels using fill */
986	>	fillfunc_t *fill
987	>	)
988		{
989	<	register int    x, y;
989	>	int     x, y;
990
991		for (y = 0; y < vresolu; y++)
992		for (x = 0; x < hresolu; x++)
993		if (zscan(y)[x] <= 0)
994		(*fill)(x,y);
995	+	if (fill == rcalfill)
996	+	clearqueue();
997		}
998
999
1000	<	writepicture()                          /* write out picture */
1000	>	static int
1001	>	clipaft(void)                   /* perform aft clipping as indicated */
1002		{
1003	+	int     x, y;
1004	+	int     adjtest = (ourview.type == VT_PER) & zisnorm;
1005	+	double  tstdist;
1006	+	double  yzn2, vx;
1007	+
1008	+	if (ourview.vaft <= FTINY)
1009	+	return(0);
1010	+	tstdist = ourview.vaft - ourview.vfore;
1011	+	for (y = 0; y < vresolu; y++) {
1012	+	if (adjtest) {                          /* adjust test */
1013	+	yzn2 = (y+.5)/vresolu + ourview.voff - .5;
1014	+	yzn2 = 1. + yzn2*yzn2*ourview.vn2;
1015	+	tstdist = (ourview.vaft - ourview.vfore)*sqrt(yzn2);
1016	+	}
1017	+	for (x = 0; x < hresolu; x++)
1018	+	if (zscan(y)[x] > tstdist) {
1019	+	if (adjtest) {
1020	+	vx = (x+.5)/hresolu + ourview.hoff - .5;
1021	+	if (zscan(y)[x] <= (ourview.vaft -
1022	+	ourview.vfore) *
1023	+	sqrt(vx*vx*ourview.hn2 + yzn2))
1024	+	continue;
1025	+	}
1026	+	if (averaging)
1027	+	memset(sscan(y)[x], '\0', sizeof(COLOR));
1028	+	else
1029	+	memset(pscan(y)[x], '\0', sizeof(COLR));
1030	+	zscan(y)[x] = 0.0;
1031	+	}
1032	+	}
1033	+	return(1);
1034	+	}
1035	+
1036	+
1037	+	static int
1038	+	addblur(void)                           /* add to blurred picture */
1039	+	{
1040	+	COLOR   cval;
1041	+	double  d;
1042	+	int     i;
1043	+
1044	+	if (!blurring)
1045	+	return(0);
1046	+	i = hresolu*vresolu;
1047	+	if (nvavg < 2)
1048	+	if (averaging)
1049	+	while (i--) {
1050	+	copycolor(ourbpict[i], ourspict[i]);
1051	+	d = 1.0/ourweigh[i];
1052	+	scalecolor(ourbpict[i], d);
1053	+	}
1054	+	else
1055	+	while (i--)
1056	+	colr_color(ourbpict[i], ourpict[i]);
1057	+	else
1058	+	if (averaging)
1059	+	while (i--) {
1060	+	copycolor(cval, ourspict[i]);
1061	+	d = 1.0/ourweigh[i];
1062	+	scalecolor(cval, d);
1063	+	addcolor(ourbpict[i], cval);
1064	+	}
1065	+	else
1066	+	while (i--) {
1067	+	colr_color(cval, ourpict[i]);
1068	+	addcolor(ourbpict[i], cval);
1069	+	}
1070	+	/* print view */
1071	+	printf("VIEW%d:", nvavg);
1072	+	fprintview(&ourview, stdout);
1073	+	putchar('\n');
1074	+	return(1);
1075	+	}
1076	+
1077	+
1078	+	static void
1079	+	writepicture(void)                              /* write out picture (alters buffer) */
1080	+	{
1081		int     y;
1082	+	int     x;
1083	+	double  d;
1084
1085		fprtresolu(hresolu, vresolu, stdout);
1086		for (y = vresolu-1; y >= 0; y--)
1087	<	if (fwritecolrs(pscan(y), hresolu, stdout) < 0)
1088	<	syserror();
1087	>	if (blurring) {
1088	>	for (x = 0; x < hresolu; x++) { /* compute avg. */
1089	>	d = rexpadj/nvavg;
1090	>	scalecolor(bscan(y)[x], d);
1091	>	}
1092	>	if (fwritescan(bscan(y), hresolu, stdout) < 0)
1093	>	syserror(progname);
1094	>	} else if (averaging) {
1095	>	for (x = 0; x < hresolu; x++) { /* average pixels */
1096	>	d = rexpadj/wscan(y)[x];
1097	>	scalecolor(sscan(y)[x], d);
1098	>	}
1099	>	if (fwritescan(sscan(y), hresolu, stdout) < 0)
1100	>	syserror(progname);
1101	>	} else {
1102	>	if (expadj)
1103	>	shiftcolrs(pscan(y), hresolu, expadj);
1104	>	if (fwritecolrs(pscan(y), hresolu, stdout) < 0)
1105	>	syserror(progname);
1106	>	}
1107		}
1108
1109
1110	<	writedistance(fname)                    /* write out z file */
1111	<	char    *fname;
1110	>	static void
1111	>	writedistance(                  /* write out z file (alters buffer) */
1112	>	char    *fname
1113	>	)
1114		{
1115	<	extern double   sqrt();
1116	<	int     donorm = normdist && ourview.type == VT_PER;
1115	>	int     donorm = normdist & !zisnorm ? 1 :
1116	>	(ourview.type == VT_PER) & !normdist & zisnorm ? -1 : 0;
1117		int     fd;
1118		int     y;
639	–	float   *zout;
1119
1120	<	if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1) {
1121	<	perror(fname);
643	<	exit(1);
644	<	}
645	<	if (donorm
646	<	&& (zout = (float *)malloc(hresolu*sizeof(float))) == NULL)
647	<	syserror();
1120	>	if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1)
1121	>	syserror(fname);
1122		for (y = vresolu-1; y >= 0; y--) {
1123		if (donorm) {
1124	<	double  vx, yzn2;
1125	<	register int    x;
1124	>	double  vx, yzn2, d;
1125	>	int     x;
1126		yzn2 = (y+.5)/vresolu + ourview.voff - .5;
1127		yzn2 = 1. + yzn2*yzn2*ourview.vn2;
1128		for (x = 0; x < hresolu; x++) {
1129		vx = (x+.5)/hresolu + ourview.hoff - .5;
1130	<	zout[x] = zscan(y)[x]
1131	<	* sqrt(vx*vx*ourview.hn2 + yzn2);
1130	>	d = sqrt(vx*vx*ourview.hn2 + yzn2);
1131	>	if (donorm > 0)
1132	>	zscan(y)[x] *= d;
1133	>	else
1134	>	zscan(y)[x] /= d;
1135		}
659	–	} else
660	–	zout = zscan(y);
661	–	if (write(fd, (char *)zout, hresolu*sizeof(float))
662	–	< hresolu*sizeof(float)) {
663	–	perror(fname);
664	–	exit(1);
1136		}
1137	+	if (write(fd, (char *)zscan(y), hresolu*sizeof(float))
1138	+	< hresolu*sizeof(float))
1139	+	syserror(fname);
1140		}
667	–	if (donorm)
668	–	free((char *)zout);
1141		close(fd);
1142		}
1143
1144
1145	<	isfloat(s)                              /* see if string is floating number */
1146	<	register char   *s;
1145	>	static void
1146	>	backfill(                               /* fill pixel with background */
1147	>	int     x,
1148	>	int     y
1149	>	)
1150		{
1151	<	for ( ; *s; s++)
1152	<	if ((*s < '0' || *s > '9') && *s != '.' && *s != '-'
1153	<	&& *s != 'e' && *s != 'E' && *s != '+')
1154	<	return(0);
1155	<	return(1);
681	<	}
682	<
683	<
684	<	backfill(x, y)                          /* fill pixel with background */
685	<	int     x, y;
686	<	{
687	<	register BYTE   *dest = pscan(y)[x];
688	<
689	<	copycolr(dest, backcolr);
1151	>	if (averaging) {
1152	>	copycolor(sscan(y)[x], backcolor);
1153	>	wscan(y)[x] = 1;
1154	>	} else
1155	>	copycolr(pscan(y)[x], backcolr);
1156		zscan(y)[x] = backz;
1157		}
1158
1159
1160	<	calstart(prog, args)                    /* start fill calculation */
1161	<	char    *prog, *args;
1160	>	static void
1161	>	calstart(                    /* start fill calculation */
1162	>	char    *prog,
1163	>	char    *args
1164	>	)
1165		{
1166		char    combuf[512];
1167	<	int     p0[2], p1[2];
1167	>	char    *argv[64];
1168	>	int     rval;
1169	>	char    **wp, *cp;
1170
1171	<	if (childpid != -1) {
1171	>	if (PDesc.flags & PF_RUNNING) {
1172		fprintf(stderr, "%s: too many calculations\n", progname);
1173		exit(1);
1174		}
1175	<	sprintf(combuf, prog, args);
1176	<	if (pipe(p0) < 0 || pipe(p1) < 0)
1177	<	syserror();
1178	<	if ((childpid = vfork()) == 0) {        /* fork calculation */
1179	<	close(p0[1]);
1180	<	close(p1[0]);
1181	<	if (p0[0] != 0) {
1182	<	dup2(p0[0], 0);
1183	<	close(p0[0]);
1184	<	}
1185	<	if (p1[1] != 1) {
1186	<	dup2(p1[1], 1);
716	<	close(p1[1]);
717	<	}
718	<	execl("/bin/sh", "sh", "-c", combuf, 0);
719	<	perror("/bin/sh");
720	<	_exit(127);
1175	>	strcpy(combuf, prog);
1176	>	strcat(combuf, args);
1177	>	cp = combuf;
1178	>	wp = argv;
1179	>	for ( ; ; ) {
1180	>	while (isspace(*cp))    /* nullify spaces */
1181	>	*cp++ = '\0';
1182	>	if (!*cp)               /* all done? */
1183	>	break;
1184	>	*wp++ = cp;             /* add argument to list */
1185	>	while (*++cp && !isspace(*cp))
1186	>	;
1187		}
1188	<	if (childpid == -1)
1189	<	syserror();
1190	<	close(p0[0]);
1191	<	close(p1[1]);
1192	<	if ((psend = fdopen(p0[1], "w")) == NULL)
1193	<	syserror();
1194	<	if ((precv = fdopen(p1[0], "r")) == NULL)
1195	<	syserror();
1188	>	*wp = NULL;
1189	>	/* start process */
1190	>	if ((rval = open_process(&PDesc, argv)) < 0)
1191	>	syserror(progname);
1192	>	if (rval == 0) {
1193	>	fprintf(stderr, "%s: command not found\n", argv[0]);
1194	>	exit(1);
1195	>	}
1196	>	packsiz = rval/(6*sizeof(float)) - 1;
1197	>	if (packsiz > PACKSIZ)
1198	>	packsiz = PACKSIZ;
1199		queuesiz = 0;
1200		}
1201
1202
1203	<	caldone()                               /* done with calculation */
1203	>	static void
1204	>	caldone(void)                               /* done with calculation */
1205		{
1206	<	int     pid;
737	<
738	<	if (childpid == -1)
1206	>	if (!(PDesc.flags & PF_RUNNING))
1207		return;
1208		clearqueue();
1209	<	fclose(psend);
742	<	fclose(precv);
743	<	while ((pid = wait(0)) != -1 && pid != childpid)
744	<	;
745	<	childpid = -1;
1209	>	close_process(&PDesc);
1210		}
1211
1212
1213	<	rcalfill(x, y)                          /* fill with ray-calculated pixel */
1214	<	int     x, y;
1213	>	static void
1214	>	rcalfill(                               /* fill with ray-calculated pixel */
1215	>	int     x,
1216	>	int     y
1217	>	)
1218		{
1219	<	if (queuesiz >= PACKSIZ)        /* flush queue if needed */
1219	>	if (queuesiz >= packsiz)        /* flush queue if needed */
1220		clearqueue();
1221		/* add position to queue */
1222		queue[queuesiz][0] = x;
#	Line 758 | Line 1225 | int    x, y;
1225		}
1226
1227
1228	<	clearqueue()                            /* process queue */
1228	>	static void
1229	>	clearqueue(void)                                /* process queue */
1230		{
1231		FVECT   orig, dir;
1232	<	float   fbuf[6];
1233	<	register int    i;
1232	>	float   fbuf[6*(PACKSIZ+1)];
1233	>	float   *fbp;
1234	>	int     i;
1235	>	double  vx, vy;
1236
1237	+	if (queuesiz == 0)
1238	+	return;
1239	+	fbp = fbuf;
1240		for (i = 0; i < queuesiz; i++) {
1241		viewray(orig, dir, &ourview,
1242		(queue[i][0]+.5)/hresolu,
1243		(queue[i][1]+.5)/vresolu);
1244	<	fbuf[0] = orig[0]; fbuf[1] = orig[1]; fbuf[2] = orig[2];
1245	<	fbuf[3] = dir[0]; fbuf[4] = dir[1]; fbuf[5] = dir[2];
773	<	fwrite((char *)fbuf, sizeof(float), 6, psend);
1244	>	*fbp++ = orig[0]; *fbp++ = orig[1]; *fbp++ = orig[2];
1245	>	*fbp++ = dir[0]; *fbp++ = dir[1]; *fbp++ = dir[2];
1246		}
1247	<	/* flush output and get results */
1248	<	fbuf[3] = fbuf[4] = fbuf[5] = 0.0;              /* mark */
1249	<	fwrite((char *)fbuf, sizeof(float), 6, psend);
1250	<	if (fflush(psend) == EOF)
1251	<	syserror();
1247	>	/* mark end and get results */
1248	>	memset((char *)fbp, '\0', 6*sizeof(float));
1249	>	if (process(&PDesc, (char *)fbuf, (char *)fbuf,
1250	>	4*sizeof(float)*(queuesiz+1),
1251	>	6*sizeof(float)*(queuesiz+1)) !=
1252	>	4*sizeof(float)*(queuesiz+1)) {
1253	>	fprintf(stderr, "%s: error reading from rtrace process\n",
1254	>	progname);
1255	>	exit(1);
1256	>	}
1257	>	fbp = fbuf;
1258		for (i = 0; i < queuesiz; i++) {
781	–	if (fread((char *)fbuf, sizeof(float), 4, precv) < 4) {
782	–	fprintf(stderr, "%s: read error in clearqueue\n",
783	–	progname);
784	–	exit(1);
785	–	}
1259		if (ourexp > 0 && ourexp != 1.0) {
1260	<	fbuf[0] *= ourexp;
1261	<	fbuf[1] *= ourexp;
1262	<	fbuf[2] *= ourexp;
1260	>	fbp[0] *= ourexp;
1261	>	fbp[1] *= ourexp;
1262	>	fbp[2] *= ourexp;
1263		}
1264	<	setcolr(pscan(queue[i][1])[queue[i][0]],
1265	<	fbuf[0], fbuf[1], fbuf[2]);
1266	<	zscan(queue[i][1])[queue[i][0]] = fbuf[3];
1264	>	if (averaging) {
1265	>	setcolor(sscan(queue[i][1])[queue[i][0]],
1266	>	fbp[0], fbp[1], fbp[2]);
1267	>	wscan(queue[i][1])[queue[i][0]] = 1;
1268	>	} else
1269	>	setcolr(pscan(queue[i][1])[queue[i][0]],
1270	>	fbp[0], fbp[1], fbp[2]);
1271	>	if (zisnorm)
1272	>	zscan(queue[i][1])[queue[i][0]] = fbp[3];
1273	>	else {
1274	>	vx = (queue[i][0]+.5)/hresolu + ourview.hoff - .5;
1275	>	vy = (queue[i][1]+.5)/vresolu + ourview.voff - .5;
1276	>	zscan(queue[i][1])[queue[i][0]] = fbp[3] / sqrt(1. +
1277	>	vx*vx*ourview.hn2 + vy*vy*ourview.vn2);
1278	>	}
1279	>	fbp += 4;
1280		}
1281		queuesiz = 0;
1282		}
1283
1284
1285	<	syserror()                      /* report error and exit */
1285	>	static void
1286	>	syserror(                       /* report error and exit */
1287	>	char    *s
1288	>	)
1289		{
1290	<	perror(progname);
1290	>	perror(s);
1291		exit(1);
1292		}

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