src/gen/replmarks.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Replace markers in Radiance scene description with objects or instances.
 *
 *      Created:        17 Feb 1991     Greg Ward
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>

#include "fvect.h"

#ifdef  M_PI
#define  PI             ((double)M_PI)
#else
#define  PI             3.14159265358979323846
#endif

#define  FEQ(a,b)       ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7)

#define  MAXVERT        6       /* maximum number of vertices for markers */
#define  MAXMARK        32      /* maximum number of markers */

typedef struct {
        short   beg, end;               /* beginning and ending vertex */
        float   len2;                   /* length squared */
}  EDGE;                        /* a marker edge */

struct mrkr {
        char    *modout;                /* output modifier */
        double  mscale;                 /* scale by this to get unit */
        char    *modin;                 /* input modifier indicating marker */
        char    *objname;               /* output object file or octree */
        int     doxform;                /* true if xform, false if instance */
}  marker[MAXMARK];             /* array of markers */
int     nmarkers = 0;           /* number of markers */

int     expand;                 /* expand commands? */

char    *progname;


main(argc, argv)
int     argc;
char    *argv[];
{
        FILE    *fp;
        int     i, j;

        progname = argv[0];
        i = 1;
        while (i < argc && argv[i][0] == '-') {
                do {
                        switch (argv[i][1]) {
                        case 'i':
                                marker[nmarkers].doxform = 0;
                                marker[nmarkers].objname = argv[++i];
                                break;
                        case 'x':
                                marker[nmarkers].doxform = 1;
                                marker[nmarkers].objname = argv[++i];
                                break;
                        case 'e':
                                expand = 1;
                                break;
                        case 'm':
                                marker[nmarkers].modout = argv[++i];
                                break;
                        case 's':
                                marker[nmarkers].mscale = atof(argv[++i]);
                                break;
                        default:
                                goto userr;
                        }
                        if (++i >= argc)
                                goto userr;
                } while (argv[i][0] == '-');
                if (marker[nmarkers].objname == NULL)
                        goto userr;
                marker[nmarkers++].modin = argv[i++];
                if (nmarkers >= MAXMARK)
                        break;
                marker[nmarkers].mscale = marker[nmarkers-1].mscale;
        }
        if (nmarkers == 0)
                goto userr;
                                        /* simple header */
        putchar('#');
        for (j = 0; j < i; j++) {
                putchar(' ');
                fputs(argv[j], stdout);
        }
        putchar('\n');
        if (i == argc)
                convert("<stdin>", stdin);
        else
                for ( ; i < argc; i++) {
                        if ((fp = fopen(argv[i], "r")) == NULL) {
                                perror(argv[i]);
                                exit(1);
                        }
                        convert(argv[i], fp);
                        fclose(fp);
                }
        exit(0);
userr:
        fprintf(stderr,
"Usage: %s [-e][-s size][-m modout] {-x objfile|-i octree} modname .. [file ..]\n",
                progname);
        exit(1);
}


convert(name, fin)              /* replace marks in a stream */
char    *name;
register FILE   *fin;
{
        register int    c;

        while ((c = getc(fin)) != EOF) {
                if (isspace(c))                         /* blank */
                        continue;
                if (c == '#') {                         /* comment */
                        putchar(c);
                        do {
                                if ((c = getc(fin)) == EOF)
                                        return;
                                putchar(c);
                        } while (c != '\n');
                } else if (c == '!') {                  /* command */
                        ungetc(c, fin);
                        cvcomm(name, fin);
                } else {                                /* object */
                        ungetc(c, fin);
                        cvobject(name, fin);
                }
        }
}


cvcomm(fname, fin)              /* convert a command */
char    *fname;
FILE    *fin;
{
        FILE    *pin, *popen();
        char    buf[512], *fgetline();

        fgetline(buf, sizeof(buf), fin);
        if (expand) {
                if ((pin = popen(buf+1, "r")) == NULL) {
                        fprintf(stderr,
                        "%s: (%s): cannot execute \"%s\"\n",
                                        progname, fname, buf);
                        exit(1);
                }
                convert(buf, pin);
                pclose(pin);
        } else
                printf("\n%s\n", buf);
}


cvobject(fname, fin)            /* convert an object */
char    *fname;
FILE    *fin;
{
        char    buf[128], typ[16], nam[128];
        int     i, n;
        register int    j;

        if (fscanf(fin, "%s %s %s", buf, typ, nam) != 3)
                goto readerr;
        if (!strcmp(typ, "polygon"))
                for (j = 0; j < nmarkers; j++)
                        if (!strcmp(buf, marker[j].modin)) {
                                replace(fname, &marker[j], nam, fin);
                                return;
                        }
        printf("\n%s %s %s\n", buf, typ, nam);
        if (!strcmp(typ, "alias")) {            /* alias special case */
                if (fscanf(fin, "%s", buf) != 1)
                        goto readerr;
                printf("\t%s\n", buf);
                return;
        }
        for (i = 0; i < 3; i++) {               /* pass along arguments */
                if (fscanf(fin, "%d", &n) != 1)
                        goto readerr;
                printf("%d", n);
                for (j = 0; j < n; j++) {
                        if (fgetword(buf, sizeof(buf), fin) == NULL)
                                goto readerr;
                        if (j%3 == 0)
                                putchar('\n');
                        putchar('\t');
                        fputword(buf, stdout);
                }
                putchar('\n');
        }
        return;
readerr:
        fprintf(stderr, "%s: (%s): read error for %s \"%s\"\n",
                        progname, fname, typ, nam);
}


replace(fname, m, mark, fin)            /* replace marker */
char    *fname;
register struct mrkr    *m;
char    *mark;
FILE    *fin;
{
        int     n;
        char    buf[256];

        buf[0] = '\0';                  /* bug fix thanks to schorsch */
        if (m->doxform) {
                sprintf(buf, "xform -e -n %s", mark);
                if (m->modout != NULL)
                        sprintf(buf+strlen(buf), " -m %s", m->modout);
                if (buildxf(buf+strlen(buf), m->mscale, fin) < 0)
                        goto badxf;
                sprintf(buf+strlen(buf), " %s", m->objname);
                if (expand) {
                        fflush(stdout);
                        system(buf);
                } else
                        printf("\n!%s\n", buf);
        } else {
                if ((n = buildxf(buf, m->mscale, fin)) < 0)
                        goto badxf;
                printf("\n%s instance %s\n",
                                m->modout==NULL?"void":m->modout, mark);
                printf("%d %s%s\n0\n0\n", n+1, m->objname, buf);
        }
        return;
badxf:
        fprintf(stderr, "%s: (%s): bad arguments for marker \"%s\"\n",
                        progname, fname, mark);
        exit(1);
}


edgecmp(e1, e2)                 /* compare two edges, descending order */
EDGE    *e1, *e2;
{
        if (e1->len2 > e2->len2)
                return(-1);
        if (e1->len2 < e2->len2)
                return(1);
        return(0);
}


int
buildxf(xf, markscale, fin)             /* build transform for marker */
register char   *xf;
double  markscale;
FILE    *fin;
{
        static FVECT    vlist[MAXVERT];
        static EDGE     elist[MAXVERT];
        FVECT   xvec, yvec, zvec;
        double  xlen;
        int     n;
        register int    i;
        /*
         * Read and sort vectors:  longest is hypotenuse,
         *      second longest is x' axis,
         *      third longest is y' axis (approximate),
         *      other vectors are ignored.
         * It is an error if the x' and y' axes do
         *      not share a common vertex (their origin).
         */
        if (fscanf(fin, "%*d %*d %d", &n) != 1)
                return(-1);
        if (n%3 != 0)
                return(-1);
        n /= 3;
        if (n < 3 || n > MAXVERT)
                return(-1);
                                        /* sort edges in descending order */
        for (i = 0; i < n; i++) {
                if (fscanf(fin, "%lf %lf %lf", &vlist[i][0],
                                &vlist[i][1], &vlist[i][2]) != 3)
                        return(-1);
                if (i) {
                        elist[i].beg = i-1;
                        elist[i].end = i;
                        elist[i].len2 = dist2(vlist[i-1],vlist[i]);
                }
        }
        elist[0].beg = n-1;
        elist[0].end = 0;
        elist[0].len2 = dist2(vlist[n-1],vlist[0]);
        qsort(elist, n, sizeof(EDGE), edgecmp);
                                        /* find x' and y' */
        if (elist[1].end == elist[2].beg || elist[1].end == elist[2].end) {
                i = elist[1].beg;
                elist[1].beg = elist[1].end;
                elist[1].end = i;
        }
        if (elist[2].end == elist[1].beg) {
                i = elist[2].beg;
                elist[2].beg = elist[2].end;
                elist[2].end = i;
        }
        if (elist[1].beg != elist[2].beg)
                return(-1);             /* x' and y' not connected! */
        for (i = 0; i < 3; i++) {
                xvec[i] = vlist[elist[1].end][i] - vlist[elist[1].beg][i];
                yvec[i] = vlist[elist[2].end][i] - vlist[elist[2].beg][i];
        }
        if ((xlen = normalize(xvec)) == 0.0)
                return(-1);
        fcross(zvec, xvec, yvec);
        if (normalize(zvec) == 0.0)
                return(-1);
        fcross(yvec, zvec, xvec);
        n = 0;                          /* start transformation... */
        if (markscale > 0.0) {          /* add scale factor */
                sprintf(xf, " -s %f", xlen*markscale);
                n += 2;
                while (*xf) ++xf;
        }
                                        /* add rotation */
        n += addrot(xf, xvec, yvec, zvec);
        while (*xf) ++xf;
                                        /* add translation */
        n += 4;
        sprintf(xf, " -t %f %f %f", vlist[elist[1].beg][0],
                        vlist[elist[1].beg][1], vlist[elist[1].beg][2]);
        return(n);                      /* all done */
}


addrot(xf, xp, yp, zp)          /* compute rotation (x,y,z) => (xp,yp,zp) */
register char   *xf;
FVECT   xp, yp, zp;
{
        int     n;
        double  theta;

        n = 0;
        theta = atan2(yp[2], zp[2]);
        if (!FEQ(theta,0.0)) {
                sprintf(xf, " -rx %f", theta*(180./PI));
                while (*xf) ++xf;
                n += 2;
        }
        theta = asin(-xp[2]);
        if (!FEQ(theta,0.0)) {
                sprintf(xf, " -ry %f", theta*(180./PI));
                while (*xf) ++xf;
                n += 2;
        }
        theta = atan2(xp[1], xp[0]);
        if (!FEQ(theta,0.0)) {
                sprintf(xf, " -rz %f", theta*(180./PI));
                /* while (*xf) ++xf; */
                n += 2;
        }
        return(n);
}
Revision:	2.5
Committed:	Sat Feb 22 02:07:24 2003 UTC (22 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.4:	+13 -17 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	greg	1.1	#ifndef lint
2	greg	2.5	static const char RCSid[] = "$Id$";
3	greg	1.1	#endif
4			/*
5			* Replace markers in Radiance scene description with objects or instances.
6			*
7			* Created: 17 Feb 1991 Greg Ward
8			*/
9
10			#include <stdio.h>
11	greg	2.5	#include <stdlib.h>
12	greg	1.1	#include <ctype.h>
13			#include <math.h>
14
15			#include "fvect.h"
16
17			#ifdef M_PI
18	gregl	2.4	#define PI ((double)M_PI)
19	greg	1.1	#else
20			#define PI 3.14159265358979323846
21			#endif
22
23	greg	1.2	#define FEQ(a,b) ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7)
24
25	greg	1.1	#define MAXVERT 6 /* maximum number of vertices for markers */
26	greg	2.2	#define MAXMARK 32 /* maximum number of markers */
27	greg	1.1
28			typedef struct {
29			short beg, end; /* beginning and ending vertex */
30			float len2; /* length squared */
31			} EDGE; /* a marker edge */
32
33	greg	2.2	struct mrkr {
34			char modout; / output modifier */
35			double mscale; /* scale by this to get unit */
36			char modin; / input modifier indicating marker */
37			char objname; / output object file or octree */
38			int doxform; /* true if xform, false if instance */
39			} marker[MAXMARK]; /* array of markers */
40			int nmarkers = 0; /* number of markers */
41	greg	1.1
42	greg	2.2	int expand; /* expand commands? */
43	greg	1.1
44			char *progname;
45
46
47			main(argc, argv)
48			int argc;
49			char *argv[];
50			{
51			FILE *fp;
52			int i, j;
53
54			progname = argv[0];
55	greg	2.2	i = 1;
56			while (i < argc && argv[i][0] == '-') {
57			do {
58			switch (argv[i][1]) {
59			case 'i':
60			marker[nmarkers].doxform = 0;
61			marker[nmarkers].objname = argv[++i];
62			break;
63			case 'x':
64			marker[nmarkers].doxform = 1;
65			marker[nmarkers].objname = argv[++i];
66			break;
67			case 'e':
68			expand = 1;
69			break;
70			case 'm':
71			marker[nmarkers].modout = argv[++i];
72			break;
73			case 's':
74			marker[nmarkers].mscale = atof(argv[++i]);
75			break;
76			default:
77			goto userr;
78			}
79			if (++i >= argc)
80			goto userr;
81			} while (argv[i][0] == '-');
82			if (marker[nmarkers].objname == NULL)
83			goto userr;
84			marker[nmarkers++].modin = argv[i++];
85			if (nmarkers >= MAXMARK)
86	greg	1.1	break;
87	greg	2.2	marker[nmarkers].mscale = marker[nmarkers-1].mscale;
88			}
89			if (nmarkers == 0)
90	greg	1.1	goto userr;
91			/* simple header */
92			putchar('#');
93			for (j = 0; j < i; j++) {
94			putchar(' ');
95			fputs(argv[j], stdout);
96			}
97			putchar('\n');
98			if (i == argc)
99			convert("<stdin>", stdin);
100			else
101			for ( ; i < argc; i++) {
102			if ((fp = fopen(argv[i], "r")) == NULL) {
103			perror(argv[i]);
104			exit(1);
105			}
106			convert(argv[i], fp);
107			fclose(fp);
108			}
109			exit(0);
110			userr:
111			fprintf(stderr,
112	greg	2.2	"Usage: %s [-e][-s size][-m modout] {-x objfile\|-i octree} modname .. [file ..]\n",
113	greg	1.1	progname);
114			exit(1);
115			}
116
117
118			convert(name, fin) /* replace marks in a stream */
119			char *name;
120			register FILE *fin;
121			{
122			register int c;
123
124			while ((c = getc(fin)) != EOF) {
125			if (isspace(c)) /* blank */
126			continue;
127			if (c == '#') { /* comment */
128			putchar(c);
129			do {
130			if ((c = getc(fin)) == EOF)
131			return;
132			putchar(c);
133			} while (c != '\n');
134			} else if (c == '!') { /* command */
135			ungetc(c, fin);
136			cvcomm(name, fin);
137			} else { /* object */
138			ungetc(c, fin);
139			cvobject(name, fin);
140			}
141			}
142			}
143
144
145			cvcomm(fname, fin) /* convert a command */
146			char *fname;
147			FILE *fin;
148			{
149			FILE pin, popen();
150			char buf[512], *fgetline();
151
152			fgetline(buf, sizeof(buf), fin);
153			if (expand) {
154			if ((pin = popen(buf+1, "r")) == NULL) {
155			fprintf(stderr,
156			"%s: (%s): cannot execute \"%s\"\n",
157			progname, fname, buf);
158			exit(1);
159			}
160			convert(buf, pin);
161			pclose(pin);
162			} else
163			printf("\n%s\n", buf);
164			}
165
166
167			cvobject(fname, fin) /* convert an object */
168			char *fname;
169			FILE *fin;
170			{
171			char buf[128], typ[16], nam[128];
172	greg	2.2	int i, n;
173			register int j;
174	greg	1.1
175			if (fscanf(fin, "%s %s %s", buf, typ, nam) != 3)
176			goto readerr;
177	greg	2.2	if (!strcmp(typ, "polygon"))
178			for (j = 0; j < nmarkers; j++)
179			if (!strcmp(buf, marker[j].modin)) {
180			replace(fname, &marker[j], nam, fin);
181			return;
182			}
183	greg	1.1	printf("\n%s %s %s\n", buf, typ, nam);
184			if (!strcmp(typ, "alias")) { /* alias special case */
185			if (fscanf(fin, "%s", buf) != 1)
186			goto readerr;
187			printf("\t%s\n", buf);
188			return;
189			}
190			for (i = 0; i < 3; i++) { /* pass along arguments */
191			if (fscanf(fin, "%d", &n) != 1)
192			goto readerr;
193			printf("%d", n);
194			for (j = 0; j < n; j++) {
195	greg	2.5	if (fgetword(buf, sizeof(buf), fin) == NULL)
196	greg	1.1	goto readerr;
197			if (j%3 == 0)
198			putchar('\n');
199	greg	2.5	putchar('\t');
200			fputword(buf, stdout);
201	greg	1.1	}
202			putchar('\n');
203			}
204			return;
205			readerr:
206			fprintf(stderr, "%s: (%s): read error for %s \"%s\"\n",
207			progname, fname, typ, nam);
208			}
209
210
211	greg	2.2	replace(fname, m, mark, fin) /* replace marker */
212			char *fname;
213			register struct mrkr *m;
214			char *mark;
215	greg	1.1	FILE *fin;
216			{
217			int n;
218			char buf[256];
219
220	greg	2.5	buf[0] = '\0'; /* bug fix thanks to schorsch */
221	greg	2.2	if (m->doxform) {
222	greg	1.1	sprintf(buf, "xform -e -n %s", mark);
223	greg	2.2	if (m->modout != NULL)
224			sprintf(buf+strlen(buf), " -m %s", m->modout);
225			if (buildxf(buf+strlen(buf), m->mscale, fin) < 0)
226	greg	1.1	goto badxf;
227	greg	2.2	sprintf(buf+strlen(buf), " %s", m->objname);
228	greg	1.1	if (expand) {
229			fflush(stdout);
230			system(buf);
231			} else
232			printf("\n!%s\n", buf);
233			} else {
234	greg	2.2	if ((n = buildxf(buf, m->mscale, fin)) < 0)
235	greg	1.1	goto badxf;
236	greg	2.2	printf("\n%s instance %s\n",
237			m->modout==NULL?"void":m->modout, mark);
238			printf("%d %s%s\n0\n0\n", n+1, m->objname, buf);
239	greg	1.1	}
240			return;
241			badxf:
242			fprintf(stderr, "%s: (%s): bad arguments for marker \"%s\"\n",
243			progname, fname, mark);
244			exit(1);
245			}
246
247
248			edgecmp(e1, e2) /* compare two edges, descending order */
249			EDGE e1, e2;
250			{
251			if (e1->len2 > e2->len2)
252			return(-1);
253			if (e1->len2 < e2->len2)
254			return(1);
255			return(0);
256			}
257
258
259			int
260	greg	2.2	buildxf(xf, markscale, fin) /* build transform for marker */
261	greg	2.5	register char *xf;
262	greg	2.2	double markscale;
263	greg	1.1	FILE *fin;
264			{
265			static FVECT vlist[MAXVERT];
266			static EDGE elist[MAXVERT];
267			FVECT xvec, yvec, zvec;
268			double xlen;
269			int n;
270			register int i;
271			/*
272			* Read and sort vectors: longest is hypotenuse,
273			* second longest is x' axis,
274			* third longest is y' axis (approximate),
275			* other vectors are ignored.
276			* It is an error if the x' and y' axes do
277			* not share a common vertex (their origin).
278			*/
279			if (fscanf(fin, "%d %d %d", &n) != 1)
280			return(-1);
281			if (n%3 != 0)
282			return(-1);
283			n /= 3;
284			if (n < 3 \|\| n > MAXVERT)
285			return(-1);
286			/* sort edges in descending order */
287			for (i = 0; i < n; i++) {
288			if (fscanf(fin, "%lf %lf %lf", &vlist[i][0],
289			&vlist[i][1], &vlist[i][2]) != 3)
290			return(-1);
291			if (i) {
292			elist[i].beg = i-1;
293			elist[i].end = i;
294			elist[i].len2 = dist2(vlist[i-1],vlist[i]);
295			}
296			}
297			elist[0].beg = n-1;
298			elist[0].end = 0;
299			elist[0].len2 = dist2(vlist[n-1],vlist[0]);
300			qsort(elist, n, sizeof(EDGE), edgecmp);
301			/* find x' and y' */
302			if (elist[1].end == elist[2].beg \|\| elist[1].end == elist[2].end) {
303			i = elist[1].beg;
304			elist[1].beg = elist[1].end;
305			elist[1].end = i;
306			}
307			if (elist[2].end == elist[1].beg) {
308			i = elist[2].beg;
309			elist[2].beg = elist[2].end;
310			elist[2].end = i;
311			}
312			if (elist[1].beg != elist[2].beg)
313			return(-1); /* x' and y' not connected! */
314			for (i = 0; i < 3; i++) {
315			xvec[i] = vlist[elist[1].end][i] - vlist[elist[1].beg][i];
316			yvec[i] = vlist[elist[2].end][i] - vlist[elist[2].beg][i];
317			}
318			if ((xlen = normalize(xvec)) == 0.0)
319			return(-1);
320			fcross(zvec, xvec, yvec);
321			if (normalize(zvec) == 0.0)
322			return(-1);
323			fcross(yvec, zvec, xvec);
324			n = 0; /* start transformation... */
325			if (markscale > 0.0) { /* add scale factor */
326			sprintf(xf, " -s %f", xlen*markscale);
327			n += 2;
328	greg	2.5	while (*xf) ++xf;
329	greg	1.1	}
330			/* add rotation */
331			n += addrot(xf, xvec, yvec, zvec);
332	greg	2.5	while (*xf) ++xf;
333	greg	1.1	/* add translation */
334			n += 4;
335			sprintf(xf, " -t %f %f %f", vlist[elist[1].beg][0],
336			vlist[elist[1].beg][1], vlist[elist[1].beg][2]);
337			return(n); /* all done */
338			}
339
340
341			addrot(xf, xp, yp, zp) /* compute rotation (x,y,z) => (xp,yp,zp) */
342	greg	2.5	register char *xf;
343	greg	1.1	FVECT xp, yp, zp;
344			{
345	greg	1.2	int n;
346			double theta;
347	greg	1.1
348	greg	1.2	n = 0;
349			theta = atan2(yp[2], zp[2]);
350			if (!FEQ(theta,0.0)) {
351			sprintf(xf, " -rx %f", theta*(180./PI));
352	greg	2.5	while (*xf) ++xf;
353	greg	1.2	n += 2;
354			}
355			theta = asin(-xp[2]);
356			if (!FEQ(theta,0.0)) {
357			sprintf(xf, " -ry %f", theta*(180./PI));
358	greg	2.5	while (*xf) ++xf;
359	greg	1.2	n += 2;
360			}
361			theta = atan2(xp[1], xp[0]);
362			if (!FEQ(theta,0.0)) {
363			sprintf(xf, " -rz %f", theta*(180./PI));
364	greg	2.5	/* while (xf) ++xf; /
365	greg	1.2	n += 2;
366			}
367			return(n);
368	greg	1.1	}