src/util/vwrays.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Compute rays corresponding to a given picture or view.
 */


#include "standard.h"

#include "view.h"

extern int      putf(), putd(), puta();

int     (*putr)() = puta;

VIEW    vw = STDVIEW;

RESOLU  rs = {PIXSTANDARD, 512, 512};

double  pa = 1.;

int     zfd = -1;

int     fromstdin = 0;

char    *progname;


main(argc, argv)
int     argc;
char    *argv[];
{
        char    *err;
        int     rval, getdim = 0;
        register int    i;

        progname = argv[0];
        if (argc < 2)
                goto userr;
        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'f':                       /* output format */
                        switch (argv[i][2]) {
                        case 'a':                       /* ASCII */
                                putr = puta;
                                break;
                        case 'f':                       /* float */
                                putr = putf;
                                break;
                        case 'd':                       /* double */
                                putr = putd;
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'v':                       /* view file or option */
                        if (argv[i][2] == 'f') {
                                rval = viewfile(argv[++i], &vw, NULL);
                                if (rval <= 0) {
                                        fprintf(stderr,
                                                "%s: no view in file\n",
                                                        argv[i]);
                                        exit(1);
                                }
                                break;
                        }
                        rval = getviewopt(&vw, argc-i, argv+i);
                        if (rval < 0)
                                goto userr;
                        i += rval;
                        break;
                case 'd':                       /* report dimensions only */
                        getdim++;
                        break;
                case 'x':                       /* x resolution */
                        rs.xr = atoi(argv[++i]);
                        if (rs.xr <= 0) {
                                fprintf(stderr, "%s: bad x resolution\n",
                                                progname);
                                exit(1);
                        }
                        break;
                case 'y':                       /* y resolution */
                        rs.yr = atoi(argv[++i]);
                        if (rs.yr <= 0) {
                                fprintf(stderr, "%s: bad y resolution\n",
                                                progname);
                                exit(1);
                        }
                        break;
                case 'p':                       /* pixel aspect ratio */
                        pa = atof(argv[++i]);
                        break;
                case 'i':                       /* get pixels from stdin */
                        fromstdin = 1;
                        break;
                default:
                        goto userr;
                }
        if (i > argc | i+2 < argc)
                goto userr;
        if (i < argc) {
                rval = viewfile(argv[i], &vw, &rs);
                if (rval <= 0) {
                        fprintf(stderr, "%s: no view in picture\n", argv[i]);
                        exit(1);
                }
                if (i+1 < argc) {
                        zfd = open(argv[i+1], O_RDONLY);
                        if (zfd < 0) {
                                fprintf(stderr,
                                        "%s: cannot open depth buffer\n",
                                                argv[i+1]);
                                exit(1);
                        }
                }
        }
        if ((err = setview(&vw)) != NULL) {
                fprintf(stderr, "%s: %s\n", progname, err);
                exit(1);
        }
        if (i == argc)
                normaspect(viewaspect(&vw), &pa, &rs.xr, &rs.yr);
        if (getdim) {
                printf("-x %d -y %d -ld%c\n", rs.xr, rs.yr,
                                vw.vaft > FTINY ? '+' : '-');
                exit(0);
        }
        if (fromstdin)
                pix2rays(stdin);
        else
                putrays();
        exit(0);
userr:
        fprintf(stderr,
        "Usage: %s [ -i -f{a|f|d} | -d ] { view opts .. | picture [zbuf] }\n",
                        progname);
        exit(1);
}


pix2rays(FILE *fp)
{
        static FVECT    rorg, rdir;
        float   zval;
        double  px, py;
        int     pp[2];
        double  d;
        register int    i;

        while (fscanf(fp, "%lf %lf", &px, &py) == 2) {
                if (px < 0 || px >= rs.xr ||
                                py < 0 || py >= rs.yr) {
                        fprintf(stderr,
                                "%s: (x,y) pair (%.0f,%.0f) out of range\n",
                                        progname, px, py);
                        exit(1);
                }
                if (zfd >= 0) {
                        loc2pix(pp, &rs, px/rs.xr, py/rs.yr);
                        if (lseek(zfd,
                                (pp[1]*scanlen(&rs)+pp[0])*sizeof(float), 0)
                                        < 0 ||
                                        read(zfd, &zval, sizeof(float))
                                        < sizeof(float)) {
                                fprintf(stderr, "%s: depth buffer read error\n",
                                                progname);
                                exit(1);
                        }
                }
                d = viewray(rorg, rdir, &vw, px/rs.xr, py/rs.yr);
                if (d < -FTINY)
                        rorg[0] = rorg[1] = rorg[2] =
                        rdir[0] = rdir[1] = rdir[2] = 0.;
                else if (zfd >= 0)
                        for (i = 0; i < 3; i++) {
                                rorg[i] += rdir[i]*zval;
                                rdir[i] = -rdir[i];
                        }
                else if (d > FTINY) {
                        rdir[0] *= d; rdir[1] *= d; rdir[2] *= d;
                }
                (*putr)(rorg, rdir);
        }
        if (!feof(fp)) {
                fprintf(stderr, "%s: expected px py on input\n", progname);
                exit(1);
        }
}


putrays()
{
        static FLOAT    loc[2];
        static FVECT    rorg, rdir;
        float   *zbuf;
        int     sc;
        double  d;
        register int    si, i;

        if (zfd >= 0) {
                zbuf = (float *)malloc(scanlen(&rs)*sizeof(float));
                if (zbuf == NULL) {
                        fprintf(stderr, "%s: not enough memory\n", progname);
                        exit(1);
                }
        }
        for (sc = 0; sc < numscans(&rs); sc++) {
                if (zfd >= 0) {
                        if (read(zfd, zbuf, scanlen(&rs)*sizeof(float)) <
                                        scanlen(&rs)*sizeof(float)) {
                                fprintf(stderr, "%s: depth buffer read error\n",
                                                progname);
                                exit(1);
                        }
                }
                for (si = 0; si < scanlen(&rs); si++) {
                        pix2loc(loc, &rs, si, sc);
                        d = viewray(rorg, rdir, &vw, loc[0], loc[1]);
                        if (d < -FTINY)
                                rorg[0] = rorg[1] = rorg[2] =
                                rdir[0] = rdir[1] = rdir[2] = 0.;
                        else if (zfd >= 0)
                                for (i = 0; i < 3; i++) {
                                        rorg[i] += rdir[i]*zbuf[si];
                                        rdir[i] = -rdir[i];
                                }
                        else if (d > FTINY) {
                                rdir[0] *= d; rdir[1] *= d; rdir[2] *= d;
                        }
                        (*putr)(rorg, rdir);
                }
        }
        if (zfd >= 0)
                free((void *)zbuf);
}


puta(ro, rd)            /* put out ray in ASCII format */
FVECT   ro, rd;
{
        printf("%.5e %.5e %.5e %.5e %.5e %.5e\n",
                        ro[0], ro[1], ro[2],
                        rd[0], rd[1], rd[2]);
}


putf(ro, rd)            /* put out ray in float format */
FVECT   ro, rd;
{
        float v[6];

        v[0] = ro[0]; v[1] = ro[1]; v[2] = ro[2];
        v[3] = rd[0]; v[4] = rd[1]; v[5] = rd[2];
        fwrite(v, sizeof(float), 6, stdout);
}


putd(ro, rd)            /* put out ray in double format */
FVECT   ro, rd;
{
        double v[6];

        v[0] = ro[0]; v[1] = ro[1]; v[2] = ro[2];
        v[3] = rd[0]; v[4] = rd[1]; v[5] = rd[2];
        fwrite(v, sizeof(double), 6, stdout);
}
Revision:	3.4
Committed:	Sat Feb 22 02:07:30 2003 UTC (21 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Changes since 3.3:	+62 -9 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	User	Rev	Content
1	gregl	3.1	#ifndef lint
2	greg	3.4	static const char RCSid[] = "$Id$";
3	gregl	3.1	#endif
4			/*
5			* Compute rays corresponding to a given picture or view.
6			*/
7
8
9			#include "standard.h"
10
11			#include "view.h"
12
13			extern int putf(), putd(), puta();
14
15			int (*putr)() = puta;
16
17			VIEW vw = STDVIEW;
18
19			RESOLU rs = {PIXSTANDARD, 512, 512};
20
21			double pa = 1.;
22
23			int zfd = -1;
24
25	greg	3.4	int fromstdin = 0;
26
27	gregl	3.1	char *progname;
28
29
30			main(argc, argv)
31			int argc;
32			char *argv[];
33			{
34			char *err;
35			int rval, getdim = 0;
36			register int i;
37
38			progname = argv[0];
39			if (argc < 2)
40			goto userr;
41			for (i = 1; i < argc && argv[i][0] == '-'; i++)
42			switch (argv[i][1]) {
43			case 'f': /* output format */
44			switch (argv[i][2]) {
45			case 'a': /* ASCII */
46			putr = puta;
47			break;
48			case 'f': /* float */
49			putr = putf;
50			break;
51			case 'd': /* double */
52			putr = putd;
53			break;
54			default:
55			goto userr;
56			}
57			break;
58			case 'v': /* view file or option */
59			if (argv[i][2] == 'f') {
60			rval = viewfile(argv[++i], &vw, NULL);
61			if (rval <= 0) {
62			fprintf(stderr,
63			"%s: no view in file\n",
64			argv[i]);
65			exit(1);
66			}
67			break;
68			}
69			rval = getviewopt(&vw, argc-i, argv+i);
70			if (rval < 0)
71			goto userr;
72			i += rval;
73			break;
74			case 'd': /* report dimensions only */
75			getdim++;
76			break;
77			case 'x': /* x resolution */
78			rs.xr = atoi(argv[++i]);
79			if (rs.xr <= 0) {
80			fprintf(stderr, "%s: bad x resolution\n",
81			progname);
82			exit(1);
83			}
84			break;
85			case 'y': /* y resolution */
86			rs.yr = atoi(argv[++i]);
87			if (rs.yr <= 0) {
88			fprintf(stderr, "%s: bad y resolution\n",
89			progname);
90			exit(1);
91			}
92			break;
93			case 'p': /* pixel aspect ratio */
94			pa = atof(argv[++i]);
95			break;
96	greg	3.4	case 'i': /* get pixels from stdin */
97			fromstdin = 1;
98			break;
99	gregl	3.1	default:
100			goto userr;
101			}
102			if (i > argc \| i+2 < argc)
103			goto userr;
104			if (i < argc) {
105			rval = viewfile(argv[i], &vw, &rs);
106			if (rval <= 0) {
107			fprintf(stderr, "%s: no view in picture\n", argv[i]);
108			exit(1);
109			}
110			if (i+1 < argc) {
111			zfd = open(argv[i+1], O_RDONLY);
112			if (zfd < 0) {
113			fprintf(stderr,
114			"%s: cannot open depth buffer\n",
115			argv[i+1]);
116			exit(1);
117			}
118			}
119			}
120			if ((err = setview(&vw)) != NULL) {
121			fprintf(stderr, "%s: %s\n", progname, err);
122			exit(1);
123			}
124			if (i == argc)
125			normaspect(viewaspect(&vw), &pa, &rs.xr, &rs.yr);
126			if (getdim) {
127	gregl	3.3	printf("-x %d -y %d -ld%c\n", rs.xr, rs.yr,
128			vw.vaft > FTINY ? '+' : '-');
129	gregl	3.1	exit(0);
130			}
131	greg	3.4	if (fromstdin)
132			pix2rays(stdin);
133			else
134			putrays();
135	gregl	3.1	exit(0);
136			userr:
137			fprintf(stderr,
138	greg	3.4	"Usage: %s [ -i -f{a\|f\|d} \| -d ] { view opts .. \| picture [zbuf] }\n",
139	gregl	3.1	progname);
140			exit(1);
141			}
142
143
144	greg	3.4	pix2rays(FILE *fp)
145			{
146			static FVECT rorg, rdir;
147			float zval;
148			double px, py;
149			int pp[2];
150			double d;
151			register int i;
152
153			while (fscanf(fp, "%lf %lf", &px, &py) == 2) {
154			if (px < 0 \|\| px >= rs.xr \|\|
155			py < 0 \|\| py >= rs.yr) {
156			fprintf(stderr,
157			"%s: (x,y) pair (%.0f,%.0f) out of range\n",
158			progname, px, py);
159			exit(1);
160			}
161			if (zfd >= 0) {
162			loc2pix(pp, &rs, px/rs.xr, py/rs.yr);
163			if (lseek(zfd,
164			(pp[1]scanlen(&rs)+pp[0])sizeof(float), 0)
165			< 0 \|\|
166			read(zfd, &zval, sizeof(float))
167			< sizeof(float)) {
168			fprintf(stderr, "%s: depth buffer read error\n",
169			progname);
170			exit(1);
171			}
172			}
173			d = viewray(rorg, rdir, &vw, px/rs.xr, py/rs.yr);
174			if (d < -FTINY)
175			rorg[0] = rorg[1] = rorg[2] =
176			rdir[0] = rdir[1] = rdir[2] = 0.;
177			else if (zfd >= 0)
178			for (i = 0; i < 3; i++) {
179			rorg[i] += rdir[i]*zval;
180			rdir[i] = -rdir[i];
181			}
182			else if (d > FTINY) {
183			rdir[0] = d; rdir[1] = d; rdir[2] *= d;
184			}
185			(*putr)(rorg, rdir);
186			}
187			if (!feof(fp)) {
188			fprintf(stderr, "%s: expected px py on input\n", progname);
189			exit(1);
190			}
191			}
192
193
194	gregl	3.1	putrays()
195			{
196	gregl	3.2	static FLOAT loc[2];
197			static FVECT rorg, rdir;
198	gregl	3.1	float *zbuf;
199			int sc;
200	gregl	3.2	double d;
201	gregl	3.1	register int si, i;
202
203			if (zfd >= 0) {
204			zbuf = (float )malloc(scanlen(&rs)sizeof(float));
205			if (zbuf == NULL) {
206			fprintf(stderr, "%s: not enough memory\n", progname);
207			exit(1);
208			}
209			}
210			for (sc = 0; sc < numscans(&rs); sc++) {
211			if (zfd >= 0) {
212			if (read(zfd, zbuf, scanlen(&rs)*sizeof(float)) <
213			scanlen(&rs)*sizeof(float)) {
214			fprintf(stderr, "%s: depth buffer read error\n",
215			progname);
216			exit(1);
217			}
218			}
219			for (si = 0; si < scanlen(&rs); si++) {
220			pix2loc(loc, &rs, si, sc);
221	gregl	3.2	d = viewray(rorg, rdir, &vw, loc[0], loc[1]);
222			if (d < -FTINY)
223	gregl	3.1	rorg[0] = rorg[1] = rorg[2] =
224			rdir[0] = rdir[1] = rdir[2] = 0.;
225			else if (zfd >= 0)
226			for (i = 0; i < 3; i++) {
227			rorg[i] += rdir[i]*zbuf[si];
228			rdir[i] = -rdir[i];
229			}
230	gregl	3.2	else if (d > FTINY) {
231			rdir[0] = d; rdir[1] = d; rdir[2] *= d;
232			}
233	gregl	3.1	(*putr)(rorg, rdir);
234			}
235			}
236			if (zfd >= 0)
237	greg	3.4	free((void *)zbuf);
238	gregl	3.1	}
239
240
241			puta(ro, rd) /* put out ray in ASCII format */
242			FVECT ro, rd;
243			{
244			printf("%.5e %.5e %.5e %.5e %.5e %.5e\n",
245			ro[0], ro[1], ro[2],
246			rd[0], rd[1], rd[2]);
247			}
248
249
250			putf(ro, rd) /* put out ray in float format */
251			FVECT ro, rd;
252			{
253			float v[6];
254
255			v[0] = ro[0]; v[1] = ro[1]; v[2] = ro[2];
256			v[3] = rd[0]; v[4] = rd[1]; v[5] = rd[2];
257			fwrite(v, sizeof(float), 6, stdout);
258			}
259
260
261			putd(ro, rd) /* put out ray in double format */
262			FVECT ro, rd;
263			{
264			double v[6];
265
266			v[0] = ro[0]; v[1] = ro[1]; v[2] = ro[2];
267			v[3] = rd[0]; v[4] = rd[1]; v[5] = rd[2];
268			fwrite(v, sizeof(double), 6, stdout);
269			}