src/gen/xform.c

/* Copyright (c) 1991 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  xform.c - program to transform object files.
 *              Transformations must preserve aspect ratio.
 *
 *     10/19/85
 *     11/6/86          Finally added error checking!
 */

#include  "standard.h"

#include  <ctype.h>

#include  "object.h"

#include  "otypes.h"

int  xac;                               /* global xform argument count */
char  **xav;                            /* global xform argument pointer */
int  xfa;                               /* start of xf arguments */

XF  tot;                                /* total transformation */
int  reverse;                           /* boolean true if scene mirrored */

int  invert = 0;                        /* boolean true to invert surfaces */

int  expand = 0;                        /* boolean true to expand commands */

char  *newmod = NULL;                   /* new modifier for surfaces */

char  *idprefix = NULL;                 /* prefix for object identifiers */

#define  ALIAS          NUMOTYPE        /* put alias at end of array */

#define  NUMTYPES       (NUMOTYPE+1)    /* total number of object types */

FUN  ofun[NUMTYPES] = INIT_OTYPE;       /* default types and actions */

short  tinvers[NUMOTYPE];               /* inverse types for surfaces */

extern char  *malloc(), *fgetword();

#define  progname  (xav[0])


main(argc, argv)                /* get transform options and transform file */
int  argc;
char  *argv[];
{
        FILE  *fopen();
        FILE  *fp;
        int  a;
                                        /* check for array */
        for (a = 1; a < argc; a++)
                if (!strcmp(argv[a], "-a"))
                        return(doarray(argc, argv, a));

        initotypes();

        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'm':
                                if (argv[a][2] || a+1 >= argc)
                                        break;
                                newmod = argv[++a];
                                continue;
                        case 'n':
                                if (argv[a][2] || a+1 >= argc)
                                        break;
                                idprefix = argv[++a];
                                continue;
                        case 'e':
                                if (argv[a][2])
                                        break;
                                expand = 1;
                                continue;
                        case 'I':
                                if (argv[a][2])
                                        break;
                                invert = 1;
                                continue;
                        }
                break;
        }

        xav = argv;
        xfa = a;

        a += xf(&tot, argc-a, argv+a);

        if (reverse = tot.sca < 0.0)
                tot.sca = -tot.sca;
        if (invert)
                reverse = !reverse;

        if (a < argc && argv[a][0] == '-') {
                fprintf(stderr, "%s: command line error at '%s'\n",
                                argv[0], argv[a]);
                exit(1);
        }

        xac = a;
                                        /* simple header */
        putchar('#');
        for (a = 0; a < xac; a++)
                printf(" %s", xav[a]);
        putchar('\n');
                                        /* transform input */
        if (xac == argc)
                xform("standard input", stdin);
        else
                for (a = xac; a < argc; a++) {
                        if ((fp = fopen(argv[a], "r")) == NULL) {
                                fprintf(stderr, "%s: cannot open \"%s\"\n",
                                                progname, argv[a]);
                                exit(1);
                        }
                        xform(argv[a], fp);
                        fclose(fp);
                }

        return(0);
}


doarray(ac, av, ai)                     /* make array */
char  **av;
int  ac, ai;
{
        char  *newav[256], **avp;
        char  newid[128], repts[32];
        char  *oldid = NULL;
        int  i, err;
        
        avp = newav+2;
        avp[0] = av[0];
        for (i = 1; i < ac; i++)
                if (!strcmp(av[i-1], "-n")) {
                        oldid = av[i];
                        avp[i] = newid;
                } else
                        avp[i] = av[i];
        avp[ai] = "-i";
        avp[ai+1] = repts;
        avp[i] = NULL;
        if (oldid == NULL) {
                newav[0] = av[0];
                newav[1] = "-n";
                newav[2] = newid;
                avp = newav;
                ac += 2;
        }
        err = 0;
        for (i = 0; i < atoi(av[ai+1]); i++) {
                if (oldid == NULL)
                        sprintf(newid, "a%d", i);
                else
                        sprintf(newid, "%s.%d", oldid, i);
                sprintf(repts, "%d", i);
                err |= main(ac, avp);
        }
        return(err);
}


xform(name, fin)                        /* transform stream by tot.xfm */
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);
                        xfcomm(name, fin);
                } else {                                /* object */
                        ungetc(c, fin);
                        xfobject(name, fin);
                }
        }
}


xfcomm(fname, fin)                      /* transform a command */
FILE  *fin;
{
        FILE  *popen();
        char  *fgetline();
        FILE  *pin;
        char  buf[512];
        int  i;

        fgetline(buf, sizeof(buf), fin);
        if (expand) {
                if (xac > 2) {
                        if ((pin = popen(buf+1, "r")) == NULL) {
                                fprintf(stderr,
                                "%s: (%s): cannot execute \"%s\"\n",
                                                progname, fname, buf);
                                exit(1);
                        }
                        xform(buf, pin);
                        pclose(pin);
                } else {
                        fflush(stdout);
                        system(buf+1);
                }
        } else {
                printf("\n%s", buf);
                if (xac > 1) {
                        printf(" | %s -e", xav[0]);
                        for (i = 1; i < xac; i++)
                                printf(" %s", xav[i]);
                }
                putchar('\n');
        }
}


xfobject(fname, fin)                            /* transform an object */
char  *fname;
FILE  *fin;
{
        extern char  *strcpy();
        char  typ[16], nam[MAXSTR];
        int  fn;
                                                /* modifier and type */
        strcpy(typ, "EOF");
        fgetword(nam, sizeof(nam), fin);
        fgetword(typ, sizeof(typ), fin);
        if ((fn = otype(typ)) < 0) {
                fprintf(stderr, "%s: (%s): unknown object type \"%s\"\n",
                                progname, fname, typ);
                exit(1);
        }
        if (issurface(fn))
                printf("\n%s %s ", newmod != NULL ? newmod : nam,
                                invert ? ofun[tinvers[fn]].funame : typ);
        else
                printf("\n%s %s ", nam, typ);
                                                /* object name */
        fgetword(nam, sizeof(nam), fin);
        if (idprefix != NULL && issurface(fn))
                printf("%s.%s\n", idprefix, nam);
        else
                printf("%s\n", nam);
                                                /* transform arguments */
        if ((*ofun[fn].funp)(fin) < 0) {
                fprintf(stderr, "%s: (%s): bad %s \"%s\"\n",
                                progname, fname, ofun[fn].funame, nam);
                exit(1);
        }
}


o_default(fin)                  /* pass on arguments unchanged */
FILE  *fin;
{
        register int  i;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
                                        /* string arguments */
        printf("%d", fa.nsargs);
        for (i = 0; i < fa.nsargs; i++)
                printf(" %s", fa.sarg[i]);
        printf("\n");
#ifdef  IARGS
                                        /* integer arguments */
        printf("%d", fa.niargs);
        for (i = 0; i < fa.niargs; i++)
                printf(" %d", fa.iarg[i]);
        printf("\n");
#else
        printf("0\n");
#endif
                                        /* float arguments */
        printf("%d", fa.nfargs);
        for (i = 0; i < fa.nfargs; i++)
                printf(" %18.12g", fa.farg[i]);
        printf("\n");
        freefargs(&fa);
        return(0);
}


addxform(fin)                   /* add xf arguments to strings */
FILE  *fin;
{
        register int  i;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
                                        /* string arguments */
        printf("%d", fa.nsargs + xac-xfa);
        for (i = 0; i < fa.nsargs; i++)
                printf(" %s", fa.sarg[i]);
        for (i = xfa; i < xac; i++)     /* add xf arguments */
                printf(" %s", xav[i]);
        printf("\n");
#ifdef  IARGS
                                        /* integer arguments */
        printf("%d", fa.niargs);
        for (i = 0; i < fa.niargs; i++)
                printf(" %d", fa.iarg[i]);
        printf("\n");
#else
        printf("0\n");
#endif
                                        /* float arguments */
        printf("%d", fa.nfargs);
        for (i = 0; i < fa.nfargs; i++)
                printf(" %18.12g", fa.farg[i]);
        printf("\n");
        freefargs(&fa);
        return(0);
}


int
otype(ofname)                   /* get object function number from its name */
register char  *ofname;
{
        register int  i;

        for (i = 0; i < NUMTYPES; i++)
                if (!strcmp(ofun[i].funame, ofname))
                        return(i);

        return(-1);             /* not found */
}


alias(fin)                      /* transfer alias */
FILE  *fin;
{
        char  aliasnm[MAXSTR];

        if (fgetword(aliasnm, MAXSTR, fin) == NULL)
                return(-1);
        printf("\t%s\n", aliasnm);
        return(0);
}


m_glow(fin)                     /* transform arguments for proximity light */
FILE  *fin;
{
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 4)
                return(-1);
        printf("0\n0\n4");
        printf(" %18.12g %18.12g %18.12g",
                        fa.farg[0], fa.farg[1], fa.farg[2]);
        printf(" %18.12g\n", fa.farg[3] * tot.sca);
        freefargs(&fa);
        return(0);
}


m_spot(fin)                     /* transform arguments for spotlight */
FILE  *fin;
{
        double  v[3];
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 7)
                return(-1);
        printf("0\n0\n7");
        printf(" %18.12g %18.12g %18.12g %18.12g\n",
                        fa.farg[0], fa.farg[1], fa.farg[2], fa.farg[3]);
        multv3(v, fa.farg+4, tot.xfm);
        printf("\t%18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
        freefargs(&fa);
        return(0);
}


m_dielectric(fin)               /* transform arguments for dielectric */
FILE  *fin;
{
        double  pow();
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 5)
                return(-1);
        printf("0\n0\n5");
        printf(" %18.12g %18.12g %18.12g",
                pow(fa.farg[0], 1.0/tot.sca),
                pow(fa.farg[1], 1.0/tot.sca),
                pow(fa.farg[2], 1.0/tot.sca));
        printf(" %18.12g %18.12g\n", fa.farg[3], fa.farg[4]);
        freefargs(&fa);
        return(0);
}


m_interface(fin)                /* transform arguments for interface */
FILE  *fin;
{
        double  pow();
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 8)
                return(-1);
        printf("0\n0\n8\n");
        printf("%18.12g %18.12g %18.12g",
                pow(fa.farg[0], 1.0/tot.sca),
                pow(fa.farg[1], 1.0/tot.sca),
                pow(fa.farg[2], 1.0/tot.sca));
        printf(" %18.12g\n", fa.farg[3]);
        printf("%18.12g %18.12g %18.12g",
                pow(fa.farg[4], 1.0/tot.sca),
                pow(fa.farg[5], 1.0/tot.sca),
                pow(fa.farg[6], 1.0/tot.sca));
        printf(" %18.12g\n", fa.farg[7]);
        freefargs(&fa);
        return(0);
}


text(fin)                       /* transform text arguments */
FILE  *fin;
{
        int  i;
        double  v[3];
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nfargs != 9 && fa.nfargs != 11 && fa.nfargs != 15)
                return(-1);
                                        /* string arguments */
        printf("%d", fa.nsargs);
        for (i = 0; i < fa.nsargs; i++)
                printf(" %s", fa.sarg[i]);
        printf("\n0\n%d\n", fa.nfargs);
                                        /* anchor point */
        multp3(v, fa.farg, tot.xfm);
        printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
                                        /* right vector */
        multv3(v, fa.farg+3, tot.xfm);
        printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
                                        /* down vector */
        multv3(v, fa.farg+6, tot.xfm);
        printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
                                        /* forground and background */
        if (fa.nfargs == 11)
                printf(" %18.12g %18.12g\n", fa.farg[9], fa.farg[10]);
        else if (fa.nfargs == 15) {
                printf(" %18.12g %18.12g %18.12g\n",
                                fa.farg[9], fa.farg[10], fa.farg[11]);
                printf(" %18.12g %18.12g %18.12g\n",
                                fa.farg[12], fa.farg[13], fa.farg[14]);
        }
        freefargs(&fa);
        return(0);
}


o_source(fin)                   /* transform source arguments */
FILE  *fin;
{
        double  dv[3];
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 4)
                return(-1);
                                        /* transform direction vector */
        multv3(dv, fa.farg, tot.xfm);
                                        /* output */
        printf("0\n0\n4");
        printf(" %18.12g %18.12g %18.12g %18.12g\n",
                        dv[0], dv[1], dv[2], fa.farg[3]);
        freefargs(&fa);
        return(0);
}


o_sphere(fin)                   /* transform sphere arguments */
FILE  *fin;
{
        double  cent[3], rad;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 4)
                return(-1);
        
        multp3(cent, fa.farg, tot.xfm); /* transform center */
        
        rad = fa.farg[3] * tot.sca;             /* scale radius */
        
        printf("0\n0\n4");
        printf(" %18.12g %18.12g %18.12g %18.12g\n",
                        cent[0], cent[1], cent[2], rad);
        freefargs(&fa);
        return(0);
}


o_face(fin)                     /* transform face arguments */
FILE  *fin;
{
        double  p[3];
        register int  i;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs % 3)
                return(-1);
        
        printf("0\n0\n%d\n", fa.nfargs);
        
        for (i = 0; i < fa.nfargs; i += 3) {
                if (reverse)
                        multp3(p, fa.farg+(fa.nfargs-i-3), tot.xfm);
                else
                        multp3(p, fa.farg+i, tot.xfm);
                printf(" %18.12g %18.12g %18.12g\n", p[0], p[1], p[2]);
        }
        freefargs(&fa);
        return(0);
}


o_cone(fin)                     /* transform cone and cup arguments */
FILE  *fin;
{
        double  p0[3], p1[3], r0, r1;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 8)
                return(-1);

        printf("0\n0\n8\n");

        multp3(p0, fa.farg, tot.xfm);
        multp3(p1, fa.farg+3, tot.xfm);
        r0 = fa.farg[6] * tot.sca;
        r1 = fa.farg[7] * tot.sca;
        printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
        printf(" %18.12g %18.12g %18.12g\n", p1[0], p1[1], p1[2]);
        printf(" %18.12g %18.12g\n", r0, r1);

        freefargs(&fa);
        return(0);
}


o_cylinder(fin)                 /* transform cylinder and tube arguments */
FILE  *fin;
{
        double  p0[3], p1[3], rad;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 7)
                return(-1);

        printf("0\n0\n7\n");

        multp3(p0, fa.farg, tot.xfm);
        multp3(p1, fa.farg+3, tot.xfm);
        rad = fa.farg[6] * tot.sca;
        printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
        printf(" %18.12g %18.12g %18.12g\n", p1[0], p1[1], p1[2]);
        printf(" %18.12g\n", rad);
        freefargs(&fa);
        return(0);
}


o_ring(fin)                     /* transform ring arguments */
FILE  *fin;
{
        double  p0[3], pd[3], r0, r1;
        FUNARGS  fa;

        if (readfargs(&fa, fin) != 1)
                return(-1);
        if (fa.nsargs != 0  || fa.nfargs != 8)
                return(-1);

        printf("0\n0\n8\n");

        multp3(p0, fa.farg, tot.xfm);
        multv3(pd, fa.farg+3, tot.xfm);
        if (invert) {
                pd[0] = -pd[0];
                pd[1] = -pd[1];
                pd[2] = -pd[2];
        }
        r0 = fa.farg[6] * tot.sca;
        r1 = fa.farg[7] * tot.sca;
        printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
        printf(" %18.12g %18.12g %18.12g\n", pd[0], pd[1], pd[2]);
        printf(" %18.12g %18.12g\n", r0, r1);
        freefargs(&fa);
        return(0);
}


initotypes()                    /* initialize ofun[] array */
{
        extern int  o_source();
        extern int  o_sphere();
        extern int  o_face();
        extern int  o_cone();
        extern int  o_cylinder();
        extern int  o_ring();
        extern int  m_glow();
        extern int  m_spot();
        extern int  m_dielectric();
        extern int  m_interface();
        extern int  text();
        extern int  alias();
        extern int  passargs();
        extern int  addxform();
        register int  i;

        if (ofun[OBJ_SOURCE].funp == o_source)
                return;                 /* done already */
                                        /* alias is additional */
        ofun[ALIAS].funame = ALIASID;
        ofun[ALIAS].flags = 0;
                                        /* functions get new transform */
        for (i = 0; i < NUMTYPES; i++)
                if (hasfunc(i))
                        ofun[i].funp = addxform;
                                        /* special cases */
        ofun[OBJ_SOURCE].funp = o_source;
        ofun[OBJ_SPHERE].funp =
        ofun[OBJ_BUBBLE].funp = o_sphere;
        ofun[OBJ_FACE].funp = o_face;
        ofun[OBJ_CONE].funp =
        ofun[OBJ_CUP].funp = o_cone;
        ofun[OBJ_CYLINDER].funp =
        ofun[OBJ_TUBE].funp = o_cylinder;
        ofun[OBJ_RING].funp = o_ring;
        ofun[OBJ_INSTANCE].funp = addxform;
        ofun[MAT_GLOW].funp = m_glow;
        ofun[MAT_SPOT].funp = m_spot;
        ofun[MAT_DIELECTRIC].funp = m_dielectric;
        ofun[MAT_INTERFACE].funp = m_interface;
        ofun[PAT_CTEXT].funp =
        ofun[PAT_BTEXT].funp =
        ofun[MIX_TEXT].funp = text;
        ofun[ALIAS].funp = alias;
                                        /* surface inverses */
        tinvers[OBJ_SOURCE] = OBJ_SOURCE;
        tinvers[OBJ_CONE] = OBJ_CUP;
        tinvers[OBJ_CUP] = OBJ_CONE;
        tinvers[OBJ_SPHERE] = OBJ_BUBBLE;
        tinvers[OBJ_BUBBLE] = OBJ_SPHERE;
        tinvers[OBJ_RING] = OBJ_RING;
        tinvers[OBJ_CYLINDER] = OBJ_TUBE;
        tinvers[OBJ_TUBE] = OBJ_CYLINDER;
        tinvers[OBJ_INSTANCE] = OBJ_INSTANCE;   /* oh, well */
}
Revision:	1.16
Committed:	Tue Oct 22 13:32:58 1991 UTC (32 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.15:	+33 -2 lines
Log Message:	added -I option to invert surfaces in scene
#	User	Rev	Content
1	greg	1.13	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* xform.c - program to transform object files.
9			* Transformations must preserve aspect ratio.
10			*
11			* 10/19/85
12			* 11/6/86 Finally added error checking!
13			*/
14
15	greg	1.12	#include "standard.h"
16	greg	1.1
17			#include <ctype.h>
18
19	greg	1.14	#include "object.h"
20
21	greg	1.11	#include "otypes.h"
22	greg	1.1
23			int xac; /* global xform argument count */
24			char *xav; / global xform argument pointer */
25			int xfa; /* start of xf arguments */
26
27	greg	1.12	XF tot; /* total transformation */
28	greg	1.16	int reverse; /* boolean true if scene mirrored */
29	greg	1.1
30	greg	1.16	int invert = 0; /* boolean true to invert surfaces */
31
32	greg	1.1	int expand = 0; /* boolean true to expand commands */
33
34	greg	1.13	char newmod = NULL; / new modifier for surfaces */
35
36	greg	1.1	char idprefix = NULL; / prefix for object identifiers */
37
38	greg	1.11	#define ALIAS NUMOTYPE /* put alias at end of array */
39	greg	1.1
40	greg	1.11	#define NUMTYPES (NUMOTYPE+1) /* total number of object types */
41	greg	1.1
42	greg	1.11	FUN ofun[NUMTYPES] = INIT_OTYPE; /* default types and actions */
43	greg	1.1
44	greg	1.16	short tinvers[NUMOTYPE]; /* inverse types for surfaces */
45
46	greg	1.15	extern char malloc(), fgetword();
47	greg	1.1
48			#define progname (xav[0])
49
50
51			main(argc, argv) /* get transform options and transform file */
52			int argc;
53			char *argv[];
54			{
55			FILE *fopen();
56			FILE *fp;
57			int a;
58	greg	1.8	/* check for array */
59			for (a = 1; a < argc; a++)
60			if (!strcmp(argv[a], "-a"))
61			return(doarray(argc, argv, a));
62	greg	1.1
63	greg	1.11	initotypes();
64
65	greg	1.1	for (a = 1; a < argc; a++) {
66			if (argv[a][0] == '-')
67			switch (argv[a][1]) {
68	greg	1.13	case 'm':
69			if (argv[a][2] \|\| a+1 >= argc)
70			break;
71			newmod = argv[++a];
72			continue;
73	greg	1.1	case 'n':
74	greg	1.9	if (argv[a][2] \|\| a+1 >= argc)
75			break;
76	greg	1.1	idprefix = argv[++a];
77			continue;
78			case 'e':
79	greg	1.9	if (argv[a][2])
80			break;
81	greg	1.1	expand = 1;
82			continue;
83	greg	1.16	case 'I':
84			if (argv[a][2])
85			break;
86			invert = 1;
87			continue;
88	greg	1.1	}
89			break;
90			}
91
92	greg	1.8	xav = argv;
93	greg	1.1	xfa = a;
94
95	greg	1.12	a += xf(&tot, argc-a, argv+a);
96	greg	1.1
97	greg	1.12	if (reverse = tot.sca < 0.0)
98			tot.sca = -tot.sca;
99	greg	1.16	if (invert)
100			reverse = !reverse;
101	greg	1.1
102	greg	1.9	if (a < argc && argv[a][0] == '-') {
103			fprintf(stderr, "%s: command line error at '%s'\n",
104			argv[0], argv[a]);
105			exit(1);
106			}
107	greg	1.10
108	greg	1.1	xac = a;
109	greg	1.10	/* simple header */
110			putchar('#');
111	greg	1.1	for (a = 0; a < xac; a++)
112			printf(" %s", xav[a]);
113			putchar('\n');
114	greg	1.10	/* transform input */
115			if (xac == argc)
116	greg	1.1	xform("standard input", stdin);
117			else
118	greg	1.10	for (a = xac; a < argc; a++) {
119	greg	1.1	if ((fp = fopen(argv[a], "r")) == NULL) {
120			fprintf(stderr, "%s: cannot open \"%s\"\n",
121			progname, argv[a]);
122			exit(1);
123			}
124			xform(argv[a], fp);
125			fclose(fp);
126			}
127
128	greg	1.8	return(0);
129			}
130
131
132			doarray(ac, av, ai) /* make array */
133			char **av;
134			int ac, ai;
135			{
136			char newav[256], *avp;
137			char newid[128], repts[32];
138			char *oldid = NULL;
139			int i, err;
140
141			avp = newav+2;
142			avp[0] = av[0];
143			for (i = 1; i < ac; i++)
144			if (!strcmp(av[i-1], "-n")) {
145			oldid = av[i];
146			avp[i] = newid;
147			} else
148			avp[i] = av[i];
149			avp[ai] = "-i";
150			avp[ai+1] = repts;
151			avp[i] = NULL;
152			if (oldid == NULL) {
153			newav[0] = av[0];
154			newav[1] = "-n";
155			newav[2] = newid;
156			avp = newav;
157			ac += 2;
158			}
159			err = 0;
160			for (i = 0; i < atoi(av[ai+1]); i++) {
161			if (oldid == NULL)
162			sprintf(newid, "a%d", i);
163			else
164			sprintf(newid, "%s.%d", oldid, i);
165			sprintf(repts, "%d", i);
166			err \|= main(ac, avp);
167			}
168			return(err);
169	greg	1.1	}
170
171
172	greg	1.12	xform(name, fin) /* transform stream by tot.xfm */
173	greg	1.1	char *name;
174			register FILE *fin;
175			{
176			register int c;
177
178			while ((c = getc(fin)) != EOF) {
179			if (isspace(c)) /* blank */
180			continue;
181			if (c == '#') { /* comment */
182			putchar(c);
183			do {
184			if ((c = getc(fin)) == EOF)
185			return;
186			putchar(c);
187			} while (c != '\n');
188			} else if (c == '!') { /* command */
189			ungetc(c, fin);
190	greg	1.7	xfcomm(name, fin);
191	greg	1.1	} else { /* object */
192			ungetc(c, fin);
193			xfobject(name, fin);
194			}
195			}
196			}
197
198
199	greg	1.7	xfcomm(fname, fin) /* transform a command */
200	greg	1.1	FILE *fin;
201			{
202			FILE *popen();
203	greg	1.7	char *fgetline();
204	greg	1.1	FILE *pin;
205			char buf[512];
206	greg	1.7	int i;
207	greg	1.1
208	greg	1.7	fgetline(buf, sizeof(buf), fin);
209			if (expand) {
210	greg	1.10	if (xac > 2) {
211			if ((pin = popen(buf+1, "r")) == NULL) {
212			fprintf(stderr,
213			"%s: (%s): cannot execute \"%s\"\n",
214			progname, fname, buf);
215			exit(1);
216			}
217			xform(buf, pin);
218			pclose(pin);
219			} else {
220			fflush(stdout);
221			system(buf+1);
222	greg	1.7	}
223			} else {
224	greg	1.10	printf("\n%s", buf);
225			if (xac > 1) {
226			printf(" \| %s -e", xav[0]);
227			for (i = 1; i < xac; i++)
228			printf(" %s", xav[i]);
229			}
230	greg	1.7	putchar('\n');
231	greg	1.1	}
232			}
233
234
235			xfobject(fname, fin) /* transform an object */
236			char *fname;
237			FILE *fin;
238			{
239	greg	1.16	extern char *strcpy();
240	greg	1.13	char typ[16], nam[MAXSTR];
241	greg	1.1	int fn;
242	greg	1.13	/* modifier and type */
243	greg	1.15	strcpy(typ, "EOF");
244			fgetword(nam, sizeof(nam), fin);
245			fgetword(typ, sizeof(typ), fin);
246	greg	1.13	if ((fn = otype(typ)) < 0) {
247	greg	1.1	fprintf(stderr, "%s: (%s): unknown object type \"%s\"\n",
248	greg	1.13	progname, fname, typ);
249	greg	1.1	exit(1);
250			}
251	greg	1.16	if (issurface(fn))
252			printf("\n%s %s ", newmod != NULL ? newmod : nam,
253			invert ? ofun[tinvers[fn]].funame : typ);
254			else
255			printf("\n%s %s ", nam, typ);
256	greg	1.13	/* object name */
257	greg	1.15	fgetword(nam, sizeof(nam), fin);
258	greg	1.1	if (idprefix != NULL && issurface(fn))
259	greg	1.13	printf("%s.%s\n", idprefix, nam);
260	greg	1.1	else
261	greg	1.13	printf("%s\n", nam);
262			/* transform arguments */
263	greg	1.1	if ((*ofun[fn].funp)(fin) < 0) {
264			fprintf(stderr, "%s: (%s): bad %s \"%s\"\n",
265	greg	1.13	progname, fname, ofun[fn].funame, nam);
266	greg	1.1	exit(1);
267			}
268			}
269
270
271	greg	1.11	o_default(fin) /* pass on arguments unchanged */
272	greg	1.1	FILE *fin;
273			{
274			register int i;
275	greg	1.14	FUNARGS fa;
276	greg	1.1
277	greg	1.15	if (readfargs(&fa, fin) != 1)
278	greg	1.1	return(-1);
279			/* string arguments */
280	greg	1.14	printf("%d", fa.nsargs);
281			for (i = 0; i < fa.nsargs; i++)
282			printf(" %s", fa.sarg[i]);
283	greg	1.1	printf("\n");
284	greg	1.14	#ifdef IARGS
285	greg	1.1	/* integer arguments */
286	greg	1.14	printf("%d", fa.niargs);
287			for (i = 0; i < fa.niargs; i++)
288			printf(" %d", fa.iarg[i]);
289	greg	1.1	printf("\n");
290	greg	1.15	#else
291			printf("0\n");
292	greg	1.14	#endif
293	greg	1.1	/* float arguments */
294	greg	1.14	printf("%d", fa.nfargs);
295			for (i = 0; i < fa.nfargs; i++)
296			printf(" %18.12g", fa.farg[i]);
297	greg	1.1	printf("\n");
298	greg	1.14	freefargs(&fa);
299	greg	1.1	return(0);
300			}
301
302
303			addxform(fin) /* add xf arguments to strings */
304			FILE *fin;
305			{
306			register int i;
307	greg	1.14	FUNARGS fa;
308	greg	1.1
309	greg	1.15	if (readfargs(&fa, fin) != 1)
310	greg	1.1	return(-1);
311			/* string arguments */
312	greg	1.14	printf("%d", fa.nsargs + xac-xfa);
313			for (i = 0; i < fa.nsargs; i++)
314			printf(" %s", fa.sarg[i]);
315	greg	1.1	for (i = xfa; i < xac; i++) /* add xf arguments */
316			printf(" %s", xav[i]);
317			printf("\n");
318	greg	1.14	#ifdef IARGS
319	greg	1.1	/* integer arguments */
320	greg	1.14	printf("%d", fa.niargs);
321			for (i = 0; i < fa.niargs; i++)
322			printf(" %d", fa.iarg[i]);
323	greg	1.1	printf("\n");
324	greg	1.15	#else
325			printf("0\n");
326	greg	1.14	#endif
327	greg	1.1	/* float arguments */
328	greg	1.14	printf("%d", fa.nfargs);
329			for (i = 0; i < fa.nfargs; i++)
330			printf(" %18.12g", fa.farg[i]);
331	greg	1.1	printf("\n");
332	greg	1.14	freefargs(&fa);
333	greg	1.1	return(0);
334			}
335
336
337			int
338			otype(ofname) /* get object function number from its name */
339			register char *ofname;
340			{
341			register int i;
342
343	greg	1.11	for (i = 0; i < NUMTYPES; i++)
344	greg	1.1	if (!strcmp(ofun[i].funame, ofname))
345			return(i);
346
347			return(-1); /* not found */
348			}
349
350
351			alias(fin) /* transfer alias */
352			FILE *fin;
353			{
354	greg	1.12	char aliasnm[MAXSTR];
355	greg	1.1
356	greg	1.15	if (fgetword(aliasnm, MAXSTR, fin) == NULL)
357	greg	1.1	return(-1);
358	greg	1.12	printf("\t%s\n", aliasnm);
359	greg	1.5	return(0);
360			}
361
362
363			m_glow(fin) /* transform arguments for proximity light */
364			FILE *fin;
365			{
366	greg	1.14	FUNARGS fa;
367	greg	1.5
368	greg	1.15	if (readfargs(&fa, fin) != 1)
369	greg	1.5	return(-1);
370	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 4)
371	greg	1.5	return(-1);
372			printf("0\n0\n4");
373			printf(" %18.12g %18.12g %18.12g",
374	greg	1.14	fa.farg[0], fa.farg[1], fa.farg[2]);
375			printf(" %18.12g\n", fa.farg[3] * tot.sca);
376			freefargs(&fa);
377	greg	1.5	return(0);
378			}
379
380
381			m_spot(fin) /* transform arguments for spotlight */
382			FILE *fin;
383			{
384			double v[3];
385	greg	1.14	FUNARGS fa;
386	greg	1.5
387	greg	1.15	if (readfargs(&fa, fin) != 1)
388	greg	1.5	return(-1);
389	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 7)
390	greg	1.5	return(-1);
391			printf("0\n0\n7");
392			printf(" %18.12g %18.12g %18.12g %18.12g\n",
393	greg	1.14	fa.farg[0], fa.farg[1], fa.farg[2], fa.farg[3]);
394			multv3(v, fa.farg+4, tot.xfm);
395	greg	1.5	printf("\t%18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
396	greg	1.14	freefargs(&fa);
397	greg	1.1	return(0);
398			}
399
400
401			m_dielectric(fin) /* transform arguments for dielectric */
402			FILE *fin;
403			{
404			double pow();
405	greg	1.14	FUNARGS fa;
406	greg	1.1
407	greg	1.15	if (readfargs(&fa, fin) != 1)
408	greg	1.1	return(-1);
409	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 5)
410	greg	1.1	return(-1);
411			printf("0\n0\n5");
412			printf(" %18.12g %18.12g %18.12g",
413	greg	1.14	pow(fa.farg[0], 1.0/tot.sca),
414			pow(fa.farg[1], 1.0/tot.sca),
415			pow(fa.farg[2], 1.0/tot.sca));
416			printf(" %18.12g %18.12g\n", fa.farg[3], fa.farg[4]);
417			freefargs(&fa);
418	greg	1.1	return(0);
419			}
420
421
422			m_interface(fin) /* transform arguments for interface */
423			FILE *fin;
424			{
425			double pow();
426	greg	1.14	FUNARGS fa;
427	greg	1.1
428	greg	1.15	if (readfargs(&fa, fin) != 1)
429	greg	1.1	return(-1);
430	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 8)
431	greg	1.1	return(-1);
432			printf("0\n0\n8\n");
433			printf("%18.12g %18.12g %18.12g",
434	greg	1.14	pow(fa.farg[0], 1.0/tot.sca),
435			pow(fa.farg[1], 1.0/tot.sca),
436			pow(fa.farg[2], 1.0/tot.sca));
437			printf(" %18.12g\n", fa.farg[3]);
438	greg	1.1	printf("%18.12g %18.12g %18.12g",
439	greg	1.14	pow(fa.farg[4], 1.0/tot.sca),
440			pow(fa.farg[5], 1.0/tot.sca),
441			pow(fa.farg[6], 1.0/tot.sca));
442			printf(" %18.12g\n", fa.farg[7]);
443			freefargs(&fa);
444	greg	1.1	return(0);
445			}
446
447
448			text(fin) /* transform text arguments */
449			FILE *fin;
450			{
451			int i;
452			double v[3];
453	greg	1.14	FUNARGS fa;
454	greg	1.1
455	greg	1.15	if (readfargs(&fa, fin) != 1)
456	greg	1.1	return(-1);
457	greg	1.14	if (fa.nfargs != 9 && fa.nfargs != 11 && fa.nfargs != 15)
458	greg	1.1	return(-1);
459			/* string arguments */
460	greg	1.14	printf("%d", fa.nsargs);
461			for (i = 0; i < fa.nsargs; i++)
462			printf(" %s", fa.sarg[i]);
463			printf("\n0\n%d\n", fa.nfargs);
464	greg	1.1	/* anchor point */
465	greg	1.14	multp3(v, fa.farg, tot.xfm);
466	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
467			/* right vector */
468	greg	1.14	multv3(v, fa.farg+3, tot.xfm);
469	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
470			/* down vector */
471	greg	1.14	multv3(v, fa.farg+6, tot.xfm);
472	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
473			/* forground and background */
474	greg	1.14	if (fa.nfargs == 11)
475			printf(" %18.12g %18.12g\n", fa.farg[9], fa.farg[10]);
476			else if (fa.nfargs == 15) {
477	greg	1.1	printf(" %18.12g %18.12g %18.12g\n",
478	greg	1.14	fa.farg[9], fa.farg[10], fa.farg[11]);
479	greg	1.1	printf(" %18.12g %18.12g %18.12g\n",
480	greg	1.14	fa.farg[12], fa.farg[13], fa.farg[14]);
481	greg	1.1	}
482	greg	1.14	freefargs(&fa);
483	greg	1.1	return(0);
484			}
485
486
487			o_source(fin) /* transform source arguments */
488			FILE *fin;
489			{
490			double dv[3];
491	greg	1.14	FUNARGS fa;
492	greg	1.1
493	greg	1.15	if (readfargs(&fa, fin) != 1)
494	greg	1.1	return(-1);
495	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 4)
496	greg	1.1	return(-1);
497			/* transform direction vector */
498	greg	1.14	multv3(dv, fa.farg, tot.xfm);
499	greg	1.1	/* output */
500			printf("0\n0\n4");
501			printf(" %18.12g %18.12g %18.12g %18.12g\n",
502	greg	1.14	dv[0], dv[1], dv[2], fa.farg[3]);
503			freefargs(&fa);
504	greg	1.1	return(0);
505			}
506
507
508			o_sphere(fin) /* transform sphere arguments */
509			FILE *fin;
510			{
511			double cent[3], rad;
512	greg	1.14	FUNARGS fa;
513	greg	1.1
514	greg	1.15	if (readfargs(&fa, fin) != 1)
515	greg	1.1	return(-1);
516	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 4)
517	greg	1.1	return(-1);
518
519	greg	1.14	multp3(cent, fa.farg, tot.xfm); /* transform center */
520	greg	1.1
521	greg	1.14	rad = fa.farg[3] * tot.sca; /* scale radius */
522	greg	1.1
523			printf("0\n0\n4");
524			printf(" %18.12g %18.12g %18.12g %18.12g\n",
525			cent[0], cent[1], cent[2], rad);
526	greg	1.14	freefargs(&fa);
527	greg	1.1	return(0);
528			}
529
530
531			o_face(fin) /* transform face arguments */
532			FILE *fin;
533			{
534			double p[3];
535			register int i;
536	greg	1.14	FUNARGS fa;
537	greg	1.1
538	greg	1.15	if (readfargs(&fa, fin) != 1)
539	greg	1.1	return(-1);
540	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs % 3)
541	greg	1.1	return(-1);
542
543	greg	1.14	printf("0\n0\n%d\n", fa.nfargs);
544	greg	1.1
545	greg	1.14	for (i = 0; i < fa.nfargs; i += 3) {
546	greg	1.1	if (reverse)
547	greg	1.14	multp3(p, fa.farg+(fa.nfargs-i-3), tot.xfm);
548	greg	1.1	else
549	greg	1.14	multp3(p, fa.farg+i, tot.xfm);
550	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p[0], p[1], p[2]);
551			}
552	greg	1.14	freefargs(&fa);
553	greg	1.1	return(0);
554			}
555
556
557			o_cone(fin) /* transform cone and cup arguments */
558			FILE *fin;
559			{
560			double p0[3], p1[3], r0, r1;
561	greg	1.14	FUNARGS fa;
562	greg	1.1
563	greg	1.15	if (readfargs(&fa, fin) != 1)
564	greg	1.1	return(-1);
565	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 8)
566	greg	1.1	return(-1);
567
568			printf("0\n0\n8\n");
569
570	greg	1.14	multp3(p0, fa.farg, tot.xfm);
571			multp3(p1, fa.farg+3, tot.xfm);
572			r0 = fa.farg[6] * tot.sca;
573			r1 = fa.farg[7] * tot.sca;
574	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
575			printf(" %18.12g %18.12g %18.12g\n", p1[0], p1[1], p1[2]);
576			printf(" %18.12g %18.12g\n", r0, r1);
577
578	greg	1.14	freefargs(&fa);
579	greg	1.1	return(0);
580			}
581
582
583			o_cylinder(fin) /* transform cylinder and tube arguments */
584			FILE *fin;
585			{
586			double p0[3], p1[3], rad;
587	greg	1.14	FUNARGS fa;
588	greg	1.1
589	greg	1.15	if (readfargs(&fa, fin) != 1)
590	greg	1.1	return(-1);
591	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 7)
592	greg	1.1	return(-1);
593
594			printf("0\n0\n7\n");
595
596	greg	1.14	multp3(p0, fa.farg, tot.xfm);
597			multp3(p1, fa.farg+3, tot.xfm);
598			rad = fa.farg[6] * tot.sca;
599	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
600			printf(" %18.12g %18.12g %18.12g\n", p1[0], p1[1], p1[2]);
601			printf(" %18.12g\n", rad);
602	greg	1.14	freefargs(&fa);
603	greg	1.1	return(0);
604			}
605
606
607			o_ring(fin) /* transform ring arguments */
608			FILE *fin;
609			{
610			double p0[3], pd[3], r0, r1;
611	greg	1.14	FUNARGS fa;
612	greg	1.1
613	greg	1.15	if (readfargs(&fa, fin) != 1)
614	greg	1.1	return(-1);
615	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 8)
616	greg	1.1	return(-1);
617
618			printf("0\n0\n8\n");
619
620	greg	1.14	multp3(p0, fa.farg, tot.xfm);
621			multv3(pd, fa.farg+3, tot.xfm);
622	greg	1.16	if (invert) {
623			pd[0] = -pd[0];
624			pd[1] = -pd[1];
625			pd[2] = -pd[2];
626			}
627	greg	1.14	r0 = fa.farg[6] * tot.sca;
628			r1 = fa.farg[7] * tot.sca;
629	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
630			printf(" %18.12g %18.12g %18.12g\n", pd[0], pd[1], pd[2]);
631			printf(" %18.12g %18.12g\n", r0, r1);
632	greg	1.14	freefargs(&fa);
633	greg	1.1	return(0);
634	greg	1.11	}
635
636
637			initotypes() /* initialize ofun[] array */
638			{
639			extern int o_source();
640			extern int o_sphere();
641			extern int o_face();
642			extern int o_cone();
643			extern int o_cylinder();
644			extern int o_ring();
645			extern int m_glow();
646			extern int m_spot();
647			extern int m_dielectric();
648			extern int m_interface();
649			extern int text();
650			extern int alias();
651			extern int passargs();
652			extern int addxform();
653			register int i;
654
655			if (ofun[OBJ_SOURCE].funp == o_source)
656			return; /* done already */
657			/* alias is additional */
658			ofun[ALIAS].funame = ALIASID;
659			ofun[ALIAS].flags = 0;
660			/* functions get new transform */
661			for (i = 0; i < NUMTYPES; i++)
662			if (hasfunc(i))
663			ofun[i].funp = addxform;
664			/* special cases */
665			ofun[OBJ_SOURCE].funp = o_source;
666			ofun[OBJ_SPHERE].funp =
667			ofun[OBJ_BUBBLE].funp = o_sphere;
668			ofun[OBJ_FACE].funp = o_face;
669			ofun[OBJ_CONE].funp =
670			ofun[OBJ_CUP].funp = o_cone;
671			ofun[OBJ_CYLINDER].funp =
672			ofun[OBJ_TUBE].funp = o_cylinder;
673			ofun[OBJ_RING].funp = o_ring;
674			ofun[OBJ_INSTANCE].funp = addxform;
675			ofun[MAT_GLOW].funp = m_glow;
676			ofun[MAT_SPOT].funp = m_spot;
677			ofun[MAT_DIELECTRIC].funp = m_dielectric;
678			ofun[MAT_INTERFACE].funp = m_interface;
679			ofun[PAT_CTEXT].funp =
680			ofun[PAT_BTEXT].funp =
681			ofun[MIX_TEXT].funp = text;
682			ofun[ALIAS].funp = alias;
683	greg	1.16	/* surface inverses */
684			tinvers[OBJ_SOURCE] = OBJ_SOURCE;
685			tinvers[OBJ_CONE] = OBJ_CUP;
686			tinvers[OBJ_CUP] = OBJ_CONE;
687			tinvers[OBJ_SPHERE] = OBJ_BUBBLE;
688			tinvers[OBJ_BUBBLE] = OBJ_SPHERE;
689			tinvers[OBJ_RING] = OBJ_RING;
690			tinvers[OBJ_CYLINDER] = OBJ_TUBE;
691			tinvers[OBJ_TUBE] = OBJ_CYLINDER;
692			tinvers[OBJ_INSTANCE] = OBJ_INSTANCE; /* oh, well */
693	greg	1.1	}