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 1.7 by greg, Tue Jan 2 17:22:07 1990 UTC vs.
Revision 2.44 by greg, Sun Mar 24 19:00:33 2013 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		*
7		*      Greg Ward       09Dec89
8		*/
9
10	<	#include "standard.h"
10	>	#include "copyright.h"
11
12	<	#include "view.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"
19		#include "color.h"
20
21	<	#define pscan(y)        (ourpict+(y)*ourview.hresolu)
18	<	#define zscan(y)        (ourzbuf+(y)*ourview.hresolu)
21	>	#define LOG2            0.69314718055994530942
22
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         256             /* max. calculation packet size */
39	+
40	+	#define RTCOM           "rtrace -h- -ovl -fff -ld- -i- -I- "
41	+
42		#define ABS(x)          ((x)>0?(x):-(x))
43
44	<	VIEW    ourview = STDVIEW(512);         /* desired view */
44	>	struct position {int x,y; float z;};
45
46	<	double  zeps = 0.001;                   /* allowed z epsilon */
46	>	#define NSTEPS          64              /* number steps in overlap prescan */
47	>	#define MINSTEP         4               /* minimum worthwhile preview step */
48
49	<	COLR    *ourpict;                       /* output picture */
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 */
54	>	double  pixaspect = 1.0;                /* pixel aspect ratio */
55	>
56	>	double  zeps = .02;                     /* allowed z epsilon */
57	>
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	<	VIEW    theirview = STDVIEW(512);       /* input view */
69	>	int     fillo = F_FORE|F_BACK;          /* selected fill options */
70	>	int     fillsamp = 0;                   /* sample separation (0 == inf) */
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;                   /* i/o normalized distance? */
75	>	char    ourfmt[LPICFMT+1] = 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;                      /* 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	+	MAT4    theirs2ours;                    /* transformation matrix */
86	+	int     hasmatrix = 0;                  /* has transformation matrix */
87
88	<	double  theirs2ours[4][4];              /* transformation matrix */
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	<	char    *err;
132	<	int     i;
131	>	int     doavg = -1;
132	>	int     doblur = 0;
133	>	char    *zfile = NULL;
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	<	switch (argv[i][1]) {
142	>	for (an = 1; an < argc && argv[an][0] == '-'; an++) {
143	>	rval = getviewopt(&ourview, argc-an, argv+an);
144	>	if (rval >= 0) {
145	>	an += rval;
146	>	continue;
147	>	}
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 'x':                               /* x resolution */
158	<	check(2,1);
159	<	ourview.hresolu = atoi(argv[++i]);
157	>	case 'a':                               /* average */
158	>	check(2,NULL);
159	>	doavg = 1;
160		break;
161	<	case 'y':                               /* y resolution */
162	<	check(2,1);
163	<	ourview.vresolu = atoi(argv[++i]);
161	>	case 'B':                               /* blur views */
162	>	check(2,NULL);
163	>	doblur = 1;
164		break;
165	<	case 'v':                               /* view */
166	<	switch (argv[i][2]) {
167	<	case 't':                               /* type */
168	<	check(4,0);
169	<	ourview.type = argv[i][3];
165	>	case 'q':                               /* quick (no avg.) */
166	>	check(2,NULL);
167	>	doavg = 0;
168	>	break;
169	>	case 'n':                               /* dist. normalized? */
170	>	check(2,NULL);
171	>	normdist = !normdist;
172	>	break;
173	>	case 'f':                               /* fill type */
174	>	switch (argv[an][2]) {
175	>	case '0':                               /* none */
176	>	check(3,NULL);
177	>	fillo = 0;
178		break;
179	<	case 'p':                               /* point */
180	<	check(3,3);
181	<	ourview.vp[0] = atof(argv[++i]);
71	<	ourview.vp[1] = atof(argv[++i]);
72	<	ourview.vp[2] = atof(argv[++i]);
179	>	case 'f':                               /* foreground */
180	>	check(3,NULL);
181	>	fillo = F_FORE;
182		break;
183	<	case 'd':                               /* direction */
184	<	check(3,3);
185	<	ourview.vdir[0] = atof(argv[++i]);
77	<	ourview.vdir[1] = atof(argv[++i]);
78	<	ourview.vdir[2] = atof(argv[++i]);
183	>	case 'b':                               /* background */
184	>	check(3,NULL);
185	>	fillo = F_BACK;
186		break;
187	<	case 'u':                               /* up */
188	<	check(3,3);
189	<	ourview.vup[0] = atof(argv[++i]);
83	<	ourview.vup[1] = atof(argv[++i]);
84	<	ourview.vup[2] = atof(argv[++i]);
187	>	case 'a':                               /* all */
188	>	check(3,NULL);
189	>	fillo = F_FORE|F_BACK;
190		break;
191	<	case 'h':                               /* horizontal */
192	<	check(3,1);
193	<	ourview.horiz = atof(argv[++i]);
191	>	case 's':                               /* sample */
192	>	check(3,"i");
193	>	fillsamp = atoi(argv[++an]);
194		break;
195	<	case 'v':                               /* vertical */
196	<	check(3,1);
197	<	ourview.vert = atof(argv[++i]);
195	>	case 'c':                               /* color */
196	>	check(3,"fff");
197	>	fillfunc = backfill;
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 'f':                               /* file */
206	<	check(3,1);
207	<	gotvfile = viewfile(argv[++i], &ourview);
208	<	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	<	}
205	>	case 'z':                               /* z value */
206	>	check(3,"f");
207	>	fillfunc = backfill;
208	>	backz = atof(argv[++an]);
209		break;
210	+	case 'r':                               /* rtrace */
211	+	check(3,"s");
212	+	fillfunc = rcalfill;
213	+	calstart(RTCOM, argv[++an]);
214	+	break;
215		default:
216		goto badopt;
217		}
218		break;
219	+	case 'z':                               /* z file */
220	+	check(2,"s");
221	+	zfile = argv[++an];
222	+	break;
223	+	case 'x':                               /* x resolution */
224	+	check(2,"i");
225	+	hresolu = atoi(argv[++an]);
226	+	break;
227	+	case 'y':                               /* y resolution */
228	+	check(2,"i");
229	+	vresolu = atoi(argv[++an]);
230	+	break;
231	+	case 'p':                               /* pixel aspect */
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[an][2] != 'f')
239	+	goto badopt;
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[an]);
247	+	exit(1);
248	+	}
249	+	break;
250		default:
251		badopt:
252	<	fprintf(stderr, "%s: unknown option '%s'\n",
253	<	progname, argv[i]);
254	<	exit(1);
252	>	fprintf(stderr, "%s: command line error at '%s'\n",
253	>	progname, argv[an]);
254	>	goto userr;
255		}
256	+	}
257		/* check arguments */
258	<	if (argc-i < 2 || (argc-i)%2) {
259	<	fprintf(stderr, "Usage: %s [view args] pfile zfile ..\n",
260	<	progname);
261	<	exit(1);
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 *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR));
289	<	ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float));
290	<	if (ourpict == NULL || ourzbuf == NULL) {
291	<	perror(progname);
292	<	exit(1);
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	<	/* get input */
299	<	for ( ; i < argc; i += 2)
300	<	addpicture(argv[i], argv[i+1]);
301	<	/* fill in spaces */
302	<	fillpicture();
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) {
326	<	printf(VIEWSTR);
327	<	fprintview(&ourview, stdout);
328	<	printf("\n");
325	>	compavgview();
326	>	if (doblur | gotvfile) {
327	>	fputs(VIEWSTR, stdout);
328	>	fprintview(&avgview, stdout);
329	>	putc('\n', stdout);
330		}
331	<	printf("\n");
332	<	/* write output */
331	>	if ((pixaspect < .99) | (pixaspect > 1.01))
332	>	fputaspect(pixaspect, stdout);
333	>	if (ourexp > 0)
334	>	ourexp *= rexpadj;
335	>	else
336	>	ourexp = rexpadj;
337	>	if ((ourexp < .995) | (ourexp > 1.005))
338	>	fputexpos(ourexp, stdout);
339	>	if (strcmp(ourfmt, PICFMT))             /* print format if known */
340	>	fputformat(ourfmt, stdout);
341	>	putc('\n', stdout);
342	>	/* write picture */
343		writepicture();
344	+	/* write z file */
345	+	if (zfile != NULL)
346	+	writedistance(zfile);
347
348		exit(0);
349	+	userr:
350	+	fprintf(stderr,
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[] = {"rview","rpict","pinterp",VIEWSTR,NULL};
159	<	register char   **an;
364	>	char    fmt[32];
365
366	<	printf("\t%s", s);
367	<
368	<	for (an = altname; *an != NULL; an++)
369	<	if (!strncmp(*an, s, strlen(*an))) {
370	<	if (sscanview(&theirview, s+strlen(*an)) == 0)
371	<	gotview++;
372	<	break;
373	<	}
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	>	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	<	addpicture(pfile, zfile)                /* add picture to output */
391	<	char    *pfile, *zfile;
390	>	static int
391	>	nextview(                               /* get and set next view */
392	>	FILE    *fp
393	>	)
394		{
395	<	FILE    *pfp, *zfp;
176	<	COLR    *scanin;
177	<	float   *zin;
395	>	char    linebuf[256];
396		char    *err;
397	<	int     xres, yres;
398	<	int     y;
399	<	/* open input files */
400	<	if ((pfp = fopen(pfile, "r")) == NULL) {
401	<	perror(pfile);
402	<	exit(1);
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	<	if ((zfp = fopen(zfile, "r")) == NULL) {
406	<	perror(zfile);
405	>	/* set new view */
406	>	if ((err = setview(&ourview)) != NULL) {
407	>	fprintf(stderr, "%s: %s\n", progname, err);
408		exit(1);
409		}
410	<	/* get header and view */
411	<	printf("%s:\n", pfile);
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	>	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	>	static void
459	>	addpicture(             /* add picture to output */
460	>	char    *pfile,
461	>	char    *zspec
462	>	)
463	>	{
464	>	FILE    *pfp;
465	>	int     zfd;
466	>	char    *err;
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	>	syserror(pfile);
475	>	/* get header with exposure and view */
476	>	theirexp = 1.0;
477	>	theirview = stdview;
478		gotview = 0;
479	<	getheader(pfp, headline);
480	<	if (!gotview || fgetresolu(&xres, &yres, pfp) != (YMAJOR|YDECR)) {
481	<	fprintf(stderr, "%s: picture view error\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);
484		exit(1);
485		}
486	<	theirview.hresolu = xres;
487	<	theirview.vresolu = yres;
488	<	if (err = setview(&theirview)) {
486	>	if (ourexp <= 0)
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)) ) {
491		fprintf(stderr, "%s: %s\n", pfile, err);
492		exit(1);
493		}
494		/* compute transformation */
495	<	pixform(theirs2ours, &theirview, &ourview);
496	<	/* allocate scanlines */
497	<	scanin = (COLR *)malloc(xres*sizeof(COLR));
498	<	zin = (float *)malloc(xres*sizeof(float));
499	<	if (scanin == NULL || zin == NULL) {
500	<	perror(progname);
501	<	exit(1);
495	>	hasmatrix = pixform(theirs2ours, &theirview, &ourview);
496	>	/* get z specification or file */
497	>	zin = (float *)malloc(scanlen(&tresolu)*sizeof(float));
498	>	if (zin == NULL)
499	>	syserror(progname);
500	>	if ((zfd = open(zspec, O_RDONLY)) == -1) {
501	>	double  zvalue;
502	>	int     x;
503	>	if (!isflt(zspec) || (zvalue = atof(zspec)) <= 0.0)
504	>	syserror(zspec);
505	>	for (x = scanlen(&tresolu); x-- > 0; )
506	>	zin[x] = zvalue;
507		}
508	<	/* load image */
509	<	for (y = yres-1; y >= 0; y--) {
510	<	if (freadcolrs(scanin, xres, pfp) < 0) {
508	>	/* compute transferrable perimeter */
509	>	xlim = (struct bound *)malloc(numscans(&tresolu)*sizeof(struct bound));
510	>	if (xlim == NULL)
511	>	syserror(progname);
512	>	if (!getperim(xlim, &ylim, zin, zfd)) { /* overlapping area? */
513	>	free((void *)zin);
514	>	free((void *)xlim);
515	>	if (zfd != -1)
516	>	close(zfd);
517	>	fclose(pfp);
518	>	return;
519	>	}
520	>	/* allocate scanlines */
521	>	scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR));
522	>	plast = (struct position *)calloc(scanlen(&tresolu),
523	>	sizeof(struct position));
524	>	if ((scanin == NULL) | (plast == NULL))
525	>	syserror(progname);
526	>	/* skip to starting point */
527	>	for (y = 0; y < ylim.min; y++)
528	>	if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) {
529		fprintf(stderr, "%s: read error\n", pfile);
530		exit(1);
531		}
532	<	if (fread(zin, sizeof(float), xres, zfp) < xres) {
533	<	fprintf(stderr, "%s: read error\n", zfile);
532	>	if (zfd != -1 && lseek(zfd,
533	>	(off_t)ylim.min*scanlen(&tresolu)*sizeof(float),
534	>	SEEK_SET) < 0)
535	>	syserror(zspec);
536	>	/* load image */
537	>	for (y = ylim.min; y <= ylim.max; y++) {
538	>	if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) {
539	>	fprintf(stderr, "%s: read error\n", pfile);
540		exit(1);
541		}
542	<	addscanline(y, scanin, zin);
542	>	if (zfd != -1 && read(zfd, (char *)zin,
543	>	scanlen(&tresolu)*sizeof(float))
544	>	< scanlen(&tresolu)*sizeof(float))
545	>	syserror(zspec);
546	>	addscanline(xlim+y, y, scanin, zin, plast);
547		}
548		/* clean up */
549	<	free((char *)scanin);
550	<	free((char *)zin);
549	>	free((void *)xlim);
550	>	free((void *)scanin);
551	>	free((void *)zin);
552	>	free((void *)plast);
553		fclose(pfp);
554	<	fclose(zfp);
554	>	if (zfd != -1)
555	>	close(zfd);
556		}
557
558
559	<	pixform(xfmat, vw1, vw2)                /* compute view1 to view2 matrix */
560	<	register double xfmat[4][4];
561	<	register VIEW   *vw1, *vw2;
559	>	static int
560	>	pixform(                /* compute view1 to view2 matrix */
561	>	MAT4    xfmat,
562	>	VIEW    *vw1,
563	>	VIEW    *vw2
564	>	)
565		{
566	<	double  m4t[4][4];
566	>	MAT4    m4t;
567
568	+	if ((vw1->type != VT_PER) & (vw1->type != VT_PAR))
569	+	return(0);
570	+	if ((vw2->type != VT_PER) & (vw2->type != VT_PAR))
571	+	return(0);
572		setident4(xfmat);
573	<	xfmat[0][0] = vw1->vhinc[0];
574	<	xfmat[0][1] = vw1->vhinc[1];
575	<	xfmat[0][2] = vw1->vhinc[2];
576	<	xfmat[1][0] = vw1->vvinc[0];
577	<	xfmat[1][1] = vw1->vvinc[1];
578	<	xfmat[1][2] = vw1->vvinc[2];
573	>	xfmat[0][0] = vw1->hvec[0];
574	>	xfmat[0][1] = vw1->hvec[1];
575	>	xfmat[0][2] = vw1->hvec[2];
576	>	xfmat[1][0] = vw1->vvec[0];
577	>	xfmat[1][1] = vw1->vvec[1];
578	>	xfmat[1][2] = vw1->vvec[2];
579		xfmat[2][0] = vw1->vdir[0];
580		xfmat[2][1] = vw1->vdir[1];
581		xfmat[2][2] = vw1->vdir[2];
#	Line 250 | Line 583 | register VIEW  *vw1, *vw2;
583		xfmat[3][1] = vw1->vp[1];
584		xfmat[3][2] = vw1->vp[2];
585		setident4(m4t);
586	<	m4t[0][0] = vw2->vhinc[0]/vw2->vhn2;
587	<	m4t[1][0] = vw2->vhinc[1]/vw2->vhn2;
588	<	m4t[2][0] = vw2->vhinc[2]/vw2->vhn2;
589	<	m4t[3][0] = -DOT(vw2->vp,vw2->vhinc)/vw2->vhn2;
590	<	m4t[0][1] = vw2->vvinc[0]/vw2->vvn2;
591	<	m4t[1][1] = vw2->vvinc[1]/vw2->vvn2;
592	<	m4t[2][1] = vw2->vvinc[2]/vw2->vvn2;
593	<	m4t[3][1] = -DOT(vw2->vp,vw2->vvinc)/vw2->vvn2;
586	>	m4t[0][0] = vw2->hvec[0]/vw2->hn2;
587	>	m4t[1][0] = vw2->hvec[1]/vw2->hn2;
588	>	m4t[2][0] = vw2->hvec[2]/vw2->hn2;
589	>	m4t[3][0] = -DOT(vw2->vp,vw2->hvec)/vw2->hn2;
590	>	m4t[0][1] = vw2->vvec[0]/vw2->vn2;
591	>	m4t[1][1] = vw2->vvec[1]/vw2->vn2;
592	>	m4t[2][1] = vw2->vvec[2]/vw2->vn2;
593	>	m4t[3][1] = -DOT(vw2->vp,vw2->vvec)/vw2->vn2;
594		m4t[0][2] = vw2->vdir[0];
595		m4t[1][2] = vw2->vdir[1];
596		m4t[2][2] = vw2->vdir[2];
597		m4t[3][2] = -DOT(vw2->vp,vw2->vdir);
598		multmat4(xfmat, xfmat, m4t);
599	+	return(1);
600		}
601
602
603	<	addscanline(y, pline, zline)            /* add scanline to output */
604	<	int     y;
605	<	COLR    *pline;
606	<	float   *zline;
603	>	static void
604	>	addscanline(    /* add scanline to output */
605	>	struct bound    *xl,
606	>	int     y,
607	>	COLR    *pline,
608	>	float   *zline,
609	>	struct position *lasty          /* input/output */
610	>	)
611		{
612	<	extern double   sqrt();
613	<	double  pos[3];
614	<	register int    x;
615	<	register int    xpos, ypos;
612	>	FVECT   pos;
613	>	struct position lastx, newpos;
614	>	double  wt;
615	>	int     x;
616
617	<	for (x = 0; x < theirview.hresolu; x++) {
618	<	pos[0] = x - .5*(theirview.hresolu-1);
619	<	pos[1] = y - .5*(theirview.vresolu-1);
617	>	lastx.z = 0;
618	>	for (x = xl->max; x >= xl->min; x--) {
619	>	pix2loc(pos, &tresolu, x, y);
620		pos[2] = zline[x];
621	+	if ((wt = movepixel(pos)) <= FTINY) {
622	+	lasty[x].z = lastx.z = 0;       /* mark invalid */
623	+	continue;
624	+	}
625	+	/* add pixel to our image */
626	+	newpos.x = pos[0] * hresolu;
627	+	newpos.y = pos[1] * vresolu;
628	+	newpos.z = zline[x];
629	+	addpixel(&newpos, &lastx, &lasty[x], pline[x], wt, pos[2]);
630	+	lasty[x].x = lastx.x = newpos.x;
631	+	lasty[x].y = lastx.y = newpos.y;
632	+	lasty[x].z = lastx.z = newpos.z;
633	+	}
634	+	}
635	+
636	+
637	+	static void
638	+	addpixel(               /* fill in pixel parallelogram */
639	+	struct position *p0,
640	+	struct position *p1,
641	+	struct position *p2,
642	+	COLR    pix,
643	+	double  w,
644	+	double  z
645	+	)
646	+	{
647	+	double  zt = 2.*zeps*p0->z;             /* threshold */
648	+	COLOR   pval;                           /* converted+weighted pixel */
649	+	int     s1x, s1y, s2x, s2y;             /* step sizes */
650	+	int     l1, l2, c1, c2;                 /* side lengths and counters */
651	+	int     p1isy;                          /* p0p1 along y? */
652	+	int     x1, y1;                         /* p1 position */
653	+	int     x, y;                   /* final position */
654	+
655	+	/* compute vector p0p1 */
656	+	if (fillo&F_FORE && ABS(p1->z-p0->z) <= zt) {
657	+	s1x = p1->x - p0->x;
658	+	s1y = p1->y - p0->y;
659	+	l1 = ABS(s1x);
660	+	if ( (p1isy = (ABS(s1y) > l1)) )
661	+	l1 = ABS(s1y);
662	+	else if (l1 < 1)
663	+	l1 = 1;
664	+	} else {
665	+	l1 = s1x = s1y = 1;
666	+	p1isy = -1;
667	+	}
668	+	/* compute vector p0p2 */
669	+	if (fillo&F_FORE && ABS(p2->z-p0->z) <= zt) {
670	+	s2x = p2->x - p0->x;
671	+	s2y = p2->y - p0->y;
672	+	if (p1isy == 1)
673	+	l2 = ABS(s2x);
674	+	else {
675	+	l2 = ABS(s2y);
676	+	if (p1isy != 0 && ABS(s2x) > l2)
677	+	l2 = ABS(s2x);
678	+	}
679	+	if (l2 < 1)
680	+	l2 = 1;
681	+	} else
682	+	l2 = s2x = s2y = 1;
683	+	/* fill the parallelogram */
684	+	if (averaging) {
685	+	colr_color(pval, pix);
686	+	scalecolor(pval, w);
687	+	}
688	+	for (c1 = l1; c1-- > 0; ) {
689	+	x1 = p0->x + c1*s1x/l1;
690	+	y1 = p0->y + c1*s1y/l1;
691	+	for (c2 = l2; c2-- > 0; ) {
692	+	x = x1 + c2*s2x/l2;
693	+	if ((x < 0) | (x >= hresolu))
694	+	continue;
695	+	y = y1 + c2*s2y/l2;
696	+	if ((y < 0) | (y >= vresolu))
697	+	continue;
698	+	if (averaging) {
699	+	if (zscan(y)[x] <= 0 || zscan(y)[x]-z
700	+	> zeps*zscan(y)[x]) {
701	+	copycolor(sscan(y)[x], pval);
702	+	wscan(y)[x] = w;
703	+	zscan(y)[x] = z;
704	+	} else if (z-zscan(y)[x] <= zeps*zscan(y)[x]) {
705	+	addcolor(sscan(y)[x], pval);
706	+	wscan(y)[x] += w;
707	+	}
708	+	} else if (zscan(y)[x] <= 0 || zscan(y)[x]-z
709	+	> zeps*zscan(y)[x]) {
710	+	copycolr(pscan(y)[x], pix);
711	+	zscan(y)[x] = z;
712	+	}
713	+	}
714	+	}
715	+	}
716	+
717	+
718	+	static double
719	+	movepixel(                              /* reposition image point */
720	+	FVECT   pos
721	+	)
722	+	{
723	+	FVECT   pt, tdir, odir;
724	+	double  d;
725	+
726	+	if (pos[2] <= 0)                /* empty pixel */
727	+	return(0);
728	+	if (usematrix) {
729	+	pos[0] += theirview.hoff - .5;
730	+	pos[1] += theirview.voff - .5;
731	+	if (normdist & (theirview.type == VT_PER))
732	+	d = sqrt(1. + pos[0]*pos[0]*theirview.hn2
733	+	+ pos[1]*pos[1]*theirview.vn2);
734	+	else
735	+	d = 1.;
736	+	pos[2] += d*theirview.vfore;
737		if (theirview.type == VT_PER) {
738	<	pos[2] /= sqrt( 1.
285	<	+ pos[0]*pos[0]*theirview.vhn2
286	<	+ pos[1]*pos[1]*theirview.vvn2 );
738	>	pos[2] /= d;
739		pos[0] *= pos[2];
740		pos[1] *= pos[2];
741		}
742		multp3(pos, pos, theirs2ours);
743	<	if (pos[2] <= 0.0)
744	<	continue;
743	>	if (pos[2] <= ourview.vfore)
744	>	return(0);
745		if (ourview.type == VT_PER) {
746		pos[0] /= pos[2];
747		pos[1] /= pos[2];
748		}
749	<	pos[0] += .5*ourview.hresolu;
750	<	pos[1] += .5*ourview.vresolu;
751	<	if (pos[0] < 0 || pos[0] >= ourview.hresolu
752	<	|| pos[1] < 0 || pos[1] >= ourview.vresolu)
753	<	continue;
754	<	/* check current value at pos */
755	<	xpos = pos[0];
756	<	ypos = pos[1];
757	<	if (zscan(ypos)[xpos] <= 0.0
758	<	|| zscan(ypos)[xpos] - pos[2]
759	<	> zeps*zscan(ypos)[xpos]) {
760	<	zscan(ypos)[xpos] = pos[2];
761	<	copycolr(pscan(ypos)[xpos], pline[x]);
749	>	pos[0] += .5 - ourview.hoff;
750	>	pos[1] += .5 - ourview.voff;
751	>	pos[2] -= ourview.vfore;
752	>	} else {
753	>	if (viewray(pt, tdir, &theirview, pos[0], pos[1]) < -FTINY)
754	>	return(0);
755	>	if ((!normdist) & (theirview.type == VT_PER))   /* adjust */
756	>	pos[2] *= sqrt(1. + pos[0]*pos[0]*theirview.hn2
757	>	+ pos[1]*pos[1]*theirview.vn2);
758	>	pt[0] += tdir[0]*pos[2];
759	>	pt[1] += tdir[1]*pos[2];
760	>	pt[2] += tdir[2]*pos[2];
761	>	viewloc(pos, &ourview, pt);
762	>	if (pos[2] <= 0)
763	>	return(0);
764	>	}
765	>	if ((pos[0] < 0) | (pos[0] >= 1-FTINY) | (pos[1] < 0) | (pos[1] >= 1-FTINY))
766	>	return(0);
767	>	if (!averaging)
768	>	return(1);
769	>	/* compute pixel weight */
770	>	if (ourview.type == VT_PAR) {
771	>	d = DOT(ourview.vdir,tdir);
772	>	d = 1. - d*d;
773	>	} else {
774	>	VSUB(odir, pt, ourview.vp);
775	>	d = DOT(odir,tdir);
776	>	d = 1. - d*d/DOT(odir,odir);
777	>	}
778	>	if (d <= 1./MAXWT/MAXWT)
779	>	return(MAXWT);          /* clip to maximum weight */
780	>	return(1./sqrt(d));
781	>	}
782	>
783	>
784	>	static int
785	>	getperim(               /* compute overlapping image area */
786	>	struct bound    *xl,
787	>	struct bound    *yl,
788	>	float   *zline,
789	>	int     zfd
790	>	)
791	>	{
792	>	int     step;
793	>	FVECT   pos;
794	>	int     x, y;
795	>	/* set up step size */
796	>	if (scanlen(&tresolu) < numscans(&tresolu))
797	>	step = scanlen(&tresolu)/NSTEPS;
798	>	else
799	>	step = numscans(&tresolu)/NSTEPS;
800	>	if (step < MINSTEP) {                   /* not worth cropping? */
801	>	yl->min = 0;
802	>	yl->max = numscans(&tresolu) - 1;
803	>	x = scanlen(&tresolu) - 1;
804	>	for (y = numscans(&tresolu); y--; ) {
805	>	xl[y].min = 0;
806	>	xl[y].max = x;
807		}
808	+	return(1);
809		}
810	+	yl->min = 32000; yl->max = 0;           /* search for points on image */
811	+	for (y = step - 1; y < numscans(&tresolu); y += step) {
812	+	if (zfd != -1) {
813	+	if (lseek(zfd, (off_t)y*scanlen(&tresolu)*sizeof(float),
814	+	SEEK_SET) < 0)
815	+	syserror("lseek");
816	+	if (read(zfd, (char *)zline,
817	+	scanlen(&tresolu)*sizeof(float))
818	+	< scanlen(&tresolu)*sizeof(float))
819	+	syserror("read");
820	+	}
821	+	xl[y].min = 32000; xl[y].max = 0;               /* x max */
822	+	for (x = scanlen(&tresolu); (x -= step) > 0; ) {
823	+	pix2loc(pos, &tresolu, x, y);
824	+	pos[2] = zline[x];
825	+	if (movepixel(pos) > FTINY) {
826	+	xl[y].max = x + step - 1;
827	+	xl[y].min = x - step + 1;       /* x min */
828	+	if (xl[y].min < 0)
829	+	xl[y].min = 0;
830	+	for (x = step - 1; x < xl[y].max; x += step) {
831	+	pix2loc(pos, &tresolu, x, y);
832	+	pos[2] = zline[x];
833	+	if (movepixel(pos) > FTINY) {
834	+	xl[y].min = x - step + 1;
835	+	break;
836	+	}
837	+	}
838	+	if (y < yl->min)                /* y limits */
839	+	yl->min = y - step + 1;
840	+	yl->max = y + step - 1;
841	+	break;
842	+	}
843	+	}
844	+	/* fill in between */
845	+	if (y < step) {
846	+	xl[y-1].min = xl[y].min;
847	+	xl[y-1].max = xl[y].max;
848	+	} else {
849	+	if (xl[y].min < xl[y-step].min)
850	+	xl[y-1].min = xl[y].min;
851	+	else
852	+	xl[y-1].min = xl[y-step].min;
853	+	if (xl[y].max > xl[y-step].max)
854	+	xl[y-1].max = xl[y].max;
855	+	else
856	+	xl[y-1].max = xl[y-step].max;
857	+	}
858	+	for (x = 2; x < step; x++)
859	+	*(xl+y-x) = *(xl+y-1);
860	+	}
861	+	if (yl->max >= numscans(&tresolu))
862	+	yl->max = numscans(&tresolu) - 1;
863	+	y -= step;
864	+	for (x = numscans(&tresolu) - 1; x > y; x--)    /* fill bottom rows */
865	+	*(xl+x) = *(xl+y);
866	+	return(yl->max >= yl->min);
867		}
868
869
870	<	fillpicture()                           /* fill in empty spaces */
870	>	static void
871	>	backpicture(                    /* background fill algorithm */
872	>	fillfunc_t *fill,
873	>	int     samp
874	>	)
875		{
876		int     *yback, xback;
877		int     y;
878	<	COLR    pfill;
320	<	register int    x, i;
878	>	int     x, i;
879		/* get back buffer */
880	<	yback = (int *)malloc(ourview.hresolu*sizeof(int));
881	<	if (yback == NULL) {
882	<	perror(progname);
883	<	return;
326	<	}
327	<	for (x = 0; x < ourview.hresolu; x++)
880	>	yback = (int *)malloc(hresolu*sizeof(int));
881	>	if (yback == NULL)
882	>	syserror(progname);
883	>	for (x = 0; x < hresolu; x++)
884		yback[x] = -2;
885		/*
886		* Xback and yback are the pixel locations of suitable
#	Line 333 | Line 889 | fillpicture()                          /* fill in empty spaces */
889		* that there is no suitable background in this direction.
890		*/
891		/* fill image */
892	<	for (y = 0; y < ourview.vresolu; y++) {
892	>	for (y = 0; y < vresolu; y++) {
893		xback = -2;
894	<	for (x = 0; x < ourview.hresolu; x++)
895	<	if (zscan(y)[x] <= 0.0) {       /* empty pixel */
894	>	for (x = 0; x < hresolu; x++)
895	>	if (zscan(y)[x] <= 0) {         /* empty pixel */
896		/*
897		* First, find background from above or below.
898		* (farthest assigned pixel)
899		*/
900		if (yback[x] == -2) {
901	<	for (i = y+1; i < ourview.vresolu; i++)
902	<	if (zscan(i)[x] > 0.0)
901	>	for (i = y+1; i < vresolu; i++)
902	>	if (zscan(i)[x] > 0)
903		break;
904	<	if (i < ourview.vresolu
904	>	if (i < vresolu
905		&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x]))
906		yback[x] = i;
907		else
#	Line 355 | Line 911 | fillpicture()                          /* fill in empty spaces */
911		* Next, find background from left or right.
912		*/
913		if (xback == -2) {
914	<	for (i = x+1; x < ourview.hresolu; i++)
915	<	if (zscan(y)[i] > 0.0)
914	>	for (i = x+1; i < hresolu; i++)
915	>	if (zscan(y)[i] > 0)
916		break;
917	<	if (i < ourview.hresolu
917	>	if (i < hresolu
918		&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i]))
919		xback = i;
920		else
921		xback = x-1;
922		}
923	+	/*
924	+	* If we have no background for this pixel,
925	+	* use the given fill function.
926	+	*/
927		if (xback < 0 && yback[x] < 0)
928	<	continue;       /* no background */
928	>	goto fillit;
929		/*
930		* Compare, and use the background that is
931		* farther, unless one of them is next to us.
932	+	* If the background is too distant, call
933	+	* the fill function.
934		*/
935	<	if (yback[x] < 0 || ABS(x-xback) <= 1
935	>	if ( yback[x] < 0
936	>	|| (xback >= 0 && ABS(x-xback) <= 1)
937		|| ( ABS(y-yback[x]) > 1
938	<	&& zscan(yback[x])[x] < zscan(y)[xback] ))
939	<	copycolr(pscan(y)[x],pscan(y)[xback]);
940	<	else
941	<	copycolr(pscan(y)[x],pscan(yback[x])[x]);
938	>	&& zscan(yback[x])[x]
939	>	< zscan(y)[xback] ) ) {
940	>	if (samp > 0 && ABS(x-xback) >= samp)
941	>	goto fillit;
942	>	if (averaging) {
943	>	copycolor(sscan(y)[x],
944	>	sscan(y)[xback]);
945	>	wscan(y)[x] = wscan(y)[xback];
946	>	} else
947	>	copycolr(pscan(y)[x],
948	>	pscan(y)[xback]);
949	>	zscan(y)[x] = zscan(y)[xback];
950	>	} else {
951	>	if (samp > 0 && ABS(y-yback[x]) > samp)
952	>	goto fillit;
953	>	if (averaging) {
954	>	copycolor(sscan(y)[x],
955	>	sscan(yback[x])[x]);
956	>	wscan(y)[x] =
957	>	wscan(yback[x])[x];
958	>	} else
959	>	copycolr(pscan(y)[x],
960	>	pscan(yback[x])[x]);
961	>	zscan(y)[x] = zscan(yback[x])[x];
962	>	}
963	>	continue;
964	>	fillit:
965	>	(*fill)(x,y);
966	>	if (fill == rcalfill) {         /* use it */
967	>	clearqueue();
968	>	xback = x;
969	>	yback[x] = y;
970	>	}
971		} else {                                /* full pixel */
972		yback[x] = -2;
973		xback = -2;
974		}
975		}
976	<	free((char *)yback);
976	>	free((void *)yback);
977		}
978
979
980	<	writepicture()                          /* write out picture */
980	>	static void
981	>	fillpicture(            /* paint in empty pixels using fill */
982	>	fillfunc_t *fill
983	>	)
984		{
985	+	int     x, y;
986	+
987	+	for (y = 0; y < vresolu; y++)
988	+	for (x = 0; x < hresolu; x++)
989	+	if (zscan(y)[x] <= 0)
990	+	(*fill)(x,y);
991	+	if (fill == rcalfill)
992	+	clearqueue();
993	+	}
994	+
995	+
996	+	static int
997	+	clipaft(void)                   /* perform aft clipping as indicated */
998	+	{
999	+	int     x, y;
1000	+	int     adjtest = (ourview.type == VT_PER) & zisnorm;
1001	+	double  tstdist;
1002	+	double  yzn2, vx;
1003	+
1004	+	if (ourview.vaft <= FTINY)
1005	+	return(0);
1006	+	tstdist = ourview.vaft - ourview.vfore;
1007	+	for (y = 0; y < vresolu; y++) {
1008	+	if (adjtest) {                          /* adjust test */
1009	+	yzn2 = (y+.5)/vresolu + ourview.voff - .5;
1010	+	yzn2 = 1. + yzn2*yzn2*ourview.vn2;
1011	+	tstdist = (ourview.vaft - ourview.vfore)*sqrt(yzn2);
1012	+	}
1013	+	for (x = 0; x < hresolu; x++)
1014	+	if (zscan(y)[x] > tstdist) {
1015	+	if (adjtest) {
1016	+	vx = (x+.5)/hresolu + ourview.hoff - .5;
1017	+	if (zscan(y)[x] <= (ourview.vaft -
1018	+	ourview.vfore) *
1019	+	sqrt(vx*vx*ourview.hn2 + yzn2))
1020	+	continue;
1021	+	}
1022	+	if (averaging)
1023	+	memset(sscan(y)[x], '\0', sizeof(COLOR));
1024	+	else
1025	+	memset(pscan(y)[x], '\0', sizeof(COLR));
1026	+	zscan(y)[x] = 0.0;
1027	+	}
1028	+	}
1029	+	return(1);
1030	+	}
1031	+
1032	+
1033	+	static int
1034	+	addblur(void)                           /* add to blurred picture */
1035	+	{
1036	+	COLOR   cval;
1037	+	double  d;
1038	+	int     i;
1039	+
1040	+	if (!blurring)
1041	+	return(0);
1042	+	i = hresolu*vresolu;
1043	+	if (nvavg < 2)
1044	+	if (averaging)
1045	+	while (i--) {
1046	+	copycolor(ourbpict[i], ourspict[i]);
1047	+	d = 1.0/ourweigh[i];
1048	+	scalecolor(ourbpict[i], d);
1049	+	}
1050	+	else
1051	+	while (i--)
1052	+	colr_color(ourbpict[i], ourpict[i]);
1053	+	else
1054	+	if (averaging)
1055	+	while (i--) {
1056	+	copycolor(cval, ourspict[i]);
1057	+	d = 1.0/ourweigh[i];
1058	+	scalecolor(cval, d);
1059	+	addcolor(ourbpict[i], cval);
1060	+	}
1061	+	else
1062	+	while (i--) {
1063	+	colr_color(cval, ourpict[i]);
1064	+	addcolor(ourbpict[i], cval);
1065	+	}
1066	+	/* print view */
1067	+	printf("VIEW%d:", nvavg);
1068	+	fprintview(&ourview, stdout);
1069	+	putchar('\n');
1070	+	return(1);
1071	+	}
1072	+
1073	+
1074	+	static void
1075	+	writepicture(void)                              /* write out picture (alters buffer) */
1076	+	{
1077		int     y;
1078	+	int     x;
1079	+	double  d;
1080
1081	<	fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout);
1082	<	for (y = ourview.vresolu-1; y >= 0; y--)
1083	<	if (fwritecolrs(pscan(y), ourview.hresolu, stdout) < 0) {
1084	<	perror(progname);
1085	<	exit(1);
1081	>	fprtresolu(hresolu, vresolu, stdout);
1082	>	for (y = vresolu-1; y >= 0; y--)
1083	>	if (blurring) {
1084	>	for (x = 0; x < hresolu; x++) { /* compute avg. */
1085	>	d = rexpadj/nvavg;
1086	>	scalecolor(bscan(y)[x], d);
1087	>	}
1088	>	if (fwritescan(bscan(y), hresolu, stdout) < 0)
1089	>	syserror(progname);
1090	>	} else if (averaging) {
1091	>	for (x = 0; x < hresolu; x++) { /* average pixels */
1092	>	d = rexpadj/wscan(y)[x];
1093	>	scalecolor(sscan(y)[x], d);
1094	>	}
1095	>	if (fwritescan(sscan(y), hresolu, stdout) < 0)
1096	>	syserror(progname);
1097	>	} else {
1098	>	if (expadj)
1099	>	shiftcolrs(pscan(y), hresolu, expadj);
1100	>	if (fwritecolrs(pscan(y), hresolu, stdout) < 0)
1101	>	syserror(progname);
1102		}
1103	+	}
1104	+
1105	+
1106	+	static void
1107	+	writedistance(                  /* write out z file (alters buffer) */
1108	+	char    *fname
1109	+	)
1110	+	{
1111	+	int     donorm = normdist & !zisnorm ? 1 :
1112	+	(ourview.type == VT_PER) & !normdist & zisnorm ? -1 : 0;
1113	+	int     fd;
1114	+	int     y;
1115	+
1116	+	if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1)
1117	+	syserror(fname);
1118	+	for (y = vresolu-1; y >= 0; y--) {
1119	+	if (donorm) {
1120	+	double  vx, yzn2, d;
1121	+	int     x;
1122	+	yzn2 = (y+.5)/vresolu + ourview.voff - .5;
1123	+	yzn2 = 1. + yzn2*yzn2*ourview.vn2;
1124	+	for (x = 0; x < hresolu; x++) {
1125	+	vx = (x+.5)/hresolu + ourview.hoff - .5;
1126	+	d = sqrt(vx*vx*ourview.hn2 + yzn2);
1127	+	if (donorm > 0)
1128	+	zscan(y)[x] *= d;
1129	+	else
1130	+	zscan(y)[x] /= d;
1131	+	}
1132	+	}
1133	+	if (write(fd, (char *)zscan(y), hresolu*sizeof(float))
1134	+	< hresolu*sizeof(float))
1135	+	syserror(fname);
1136	+	}
1137	+	close(fd);
1138	+	}
1139	+
1140	+
1141	+	static void
1142	+	backfill(                               /* fill pixel with background */
1143	+	int     x,
1144	+	int     y
1145	+	)
1146	+	{
1147	+	if (averaging) {
1148	+	copycolor(sscan(y)[x], backcolor);
1149	+	wscan(y)[x] = 1;
1150	+	} else
1151	+	copycolr(pscan(y)[x], backcolr);
1152	+	zscan(y)[x] = backz;
1153	+	}
1154	+
1155	+
1156	+	static void
1157	+	calstart(                    /* start fill calculation */
1158	+	char    *prog,
1159	+	char    *args
1160	+	)
1161	+	{
1162	+	char    combuf[512];
1163	+	char    *argv[64];
1164	+	int     rval;
1165	+	char    **wp, *cp;
1166	+
1167	+	if (PDesc.running) {
1168	+	fprintf(stderr, "%s: too many calculations\n", progname);
1169	+	exit(1);
1170	+	}
1171	+	strcpy(combuf, prog);
1172	+	strcat(combuf, args);
1173	+	cp = combuf;
1174	+	wp = argv;
1175	+	for ( ; ; ) {
1176	+	while (isspace(*cp))    /* nullify spaces */
1177	+	*cp++ = '\0';
1178	+	if (!*cp)               /* all done? */
1179	+	break;
1180	+	*wp++ = cp;             /* add argument to list */
1181	+	while (*++cp && !isspace(*cp))
1182	+	;
1183	+	}
1184	+	*wp = NULL;
1185	+	/* start process */
1186	+	if ((rval = open_process(&PDesc, argv)) < 0)
1187	+	syserror(progname);
1188	+	if (rval == 0) {
1189	+	fprintf(stderr, "%s: command not found\n", argv[0]);
1190	+	exit(1);
1191	+	}
1192	+	packsiz = rval/(6*sizeof(float)) - 1;
1193	+	if (packsiz > PACKSIZ)
1194	+	packsiz = PACKSIZ;
1195	+	queuesiz = 0;
1196	+	}
1197	+
1198	+
1199	+	static void
1200	+	caldone(void)                               /* done with calculation */
1201	+	{
1202	+	if (!PDesc.running)
1203	+	return;
1204	+	clearqueue();
1205	+	close_process(&PDesc);
1206	+	}
1207	+
1208	+
1209	+	static void
1210	+	rcalfill(                               /* fill with ray-calculated pixel */
1211	+	int     x,
1212	+	int     y
1213	+	)
1214	+	{
1215	+	if (queuesiz >= packsiz)        /* flush queue if needed */
1216	+	clearqueue();
1217	+	/* add position to queue */
1218	+	queue[queuesiz][0] = x;
1219	+	queue[queuesiz][1] = y;
1220	+	queuesiz++;
1221	+	}
1222	+
1223	+
1224	+	static void
1225	+	clearqueue(void)                                /* process queue */
1226	+	{
1227	+	FVECT   orig, dir;
1228	+	float   fbuf[6*(PACKSIZ+1)];
1229	+	float   *fbp;
1230	+	int     i;
1231	+	double  vx, vy;
1232	+
1233	+	if (queuesiz == 0)
1234	+	return;
1235	+	fbp = fbuf;
1236	+	for (i = 0; i < queuesiz; i++) {
1237	+	viewray(orig, dir, &ourview,
1238	+	(queue[i][0]+.5)/hresolu,
1239	+	(queue[i][1]+.5)/vresolu);
1240	+	*fbp++ = orig[0]; *fbp++ = orig[1]; *fbp++ = orig[2];
1241	+	*fbp++ = dir[0]; *fbp++ = dir[1]; *fbp++ = dir[2];
1242	+	}
1243	+	/* mark end and get results */
1244	+	memset((char *)fbp, '\0', 6*sizeof(float));
1245	+	if (process(&PDesc, (char *)fbuf, (char *)fbuf,
1246	+	4*sizeof(float)*(queuesiz+1),
1247	+	6*sizeof(float)*(queuesiz+1)) !=
1248	+	4*sizeof(float)*(queuesiz+1)) {
1249	+	fprintf(stderr, "%s: error reading from rtrace process\n",
1250	+	progname);
1251	+	exit(1);
1252	+	}
1253	+	fbp = fbuf;
1254	+	for (i = 0; i < queuesiz; i++) {
1255	+	if (ourexp > 0 && ourexp != 1.0) {
1256	+	fbp[0] *= ourexp;
1257	+	fbp[1] *= ourexp;
1258	+	fbp[2] *= ourexp;
1259	+	}
1260	+	if (averaging) {
1261	+	setcolor(sscan(queue[i][1])[queue[i][0]],
1262	+	fbp[0], fbp[1], fbp[2]);
1263	+	wscan(queue[i][1])[queue[i][0]] = 1;
1264	+	} else
1265	+	setcolr(pscan(queue[i][1])[queue[i][0]],
1266	+	fbp[0], fbp[1], fbp[2]);
1267	+	if (zisnorm)
1268	+	zscan(queue[i][1])[queue[i][0]] = fbp[3];
1269	+	else {
1270	+	vx = (queue[i][0]+.5)/hresolu + ourview.hoff - .5;
1271	+	vy = (queue[i][1]+.5)/vresolu + ourview.voff - .5;
1272	+	zscan(queue[i][1])[queue[i][0]] = fbp[3] / sqrt(1. +
1273	+	vx*vx*ourview.hn2 + vy*vy*ourview.vn2);
1274	+	}
1275	+	fbp += 4;
1276	+	}
1277	+	queuesiz = 0;
1278	+	}
1279	+
1280	+
1281	+	static void
1282	+	syserror(                       /* report error and exit */
1283	+	char    *s
1284	+	)
1285	+	{
1286	+	perror(s);
1287	+	exit(1);
1288		}

Diff Legend

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