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 inverted */

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 */

extern char  *malloc();

#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;
                        }
                break;
        }

        xav = argv;
        xfa = a;

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

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

        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;
{
        char  typ[16], nam[MAXSTR];
        int  fn;
                                                /* modifier and type */
        fscanf(fin, "%s %s", nam, typ);
        if ((fn = otype(typ)) < 0) {
                fprintf(stderr, "%s: (%s): unknown object type \"%s\"\n",
                                progname, fname, typ);
                exit(1);
        }
        printf("\n%s %s ", newmod!=NULL && issurface(fn) ? newmod : nam, typ);
                                                /* object name */
        fscanf(fin, "%s", nam);
        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) <= 0)
                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");
#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) <= 0)
                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");
#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 (fscanf(fin, "%s", aliasnm) != 1)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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) <= 0)
                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);
        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;
}
Revision:	1.14
Committed:	Fri Jul 19 09:43:40 1991 UTC (32 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.13:	+122 -202 lines
Log Message:	moved readfargs() and freefargs() to library
#	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	1.1	int reverse; /* boolean true if scene inverted */
29
30			int expand = 0; /* boolean true to expand commands */
31
32	greg	1.13	char newmod = NULL; / new modifier for surfaces */
33
34	greg	1.1	char idprefix = NULL; / prefix for object identifiers */
35
36	greg	1.11	#define ALIAS NUMOTYPE /* put alias at end of array */
37	greg	1.1
38	greg	1.11	#define NUMTYPES (NUMOTYPE+1) /* total number of object types */
39	greg	1.1
40	greg	1.11	FUN ofun[NUMTYPES] = INIT_OTYPE; /* default types and actions */
41	greg	1.1
42	greg	1.14	extern char *malloc();
43	greg	1.1
44			#define progname (xav[0])
45
46
47			main(argc, argv) /* get transform options and transform file */
48			int argc;
49			char *argv[];
50			{
51			FILE *fopen();
52			FILE *fp;
53			int a;
54	greg	1.8	/* check for array */
55			for (a = 1; a < argc; a++)
56			if (!strcmp(argv[a], "-a"))
57			return(doarray(argc, argv, a));
58	greg	1.1
59	greg	1.11	initotypes();
60
61	greg	1.1	for (a = 1; a < argc; a++) {
62			if (argv[a][0] == '-')
63			switch (argv[a][1]) {
64	greg	1.13	case 'm':
65			if (argv[a][2] \|\| a+1 >= argc)
66			break;
67			newmod = argv[++a];
68			continue;
69	greg	1.1	case 'n':
70	greg	1.9	if (argv[a][2] \|\| a+1 >= argc)
71			break;
72	greg	1.1	idprefix = argv[++a];
73			continue;
74			case 'e':
75	greg	1.9	if (argv[a][2])
76			break;
77	greg	1.1	expand = 1;
78			continue;
79			}
80			break;
81			}
82
83	greg	1.8	xav = argv;
84	greg	1.1	xfa = a;
85
86	greg	1.12	a += xf(&tot, argc-a, argv+a);
87	greg	1.1
88	greg	1.12	if (reverse = tot.sca < 0.0)
89			tot.sca = -tot.sca;
90	greg	1.1
91	greg	1.9	if (a < argc && argv[a][0] == '-') {
92			fprintf(stderr, "%s: command line error at '%s'\n",
93			argv[0], argv[a]);
94			exit(1);
95			}
96	greg	1.10
97	greg	1.1	xac = a;
98	greg	1.10	/* simple header */
99			putchar('#');
100	greg	1.1	for (a = 0; a < xac; a++)
101			printf(" %s", xav[a]);
102			putchar('\n');
103	greg	1.10	/* transform input */
104			if (xac == argc)
105	greg	1.1	xform("standard input", stdin);
106			else
107	greg	1.10	for (a = xac; a < argc; a++) {
108	greg	1.1	if ((fp = fopen(argv[a], "r")) == NULL) {
109			fprintf(stderr, "%s: cannot open \"%s\"\n",
110			progname, argv[a]);
111			exit(1);
112			}
113			xform(argv[a], fp);
114			fclose(fp);
115			}
116
117	greg	1.8	return(0);
118			}
119
120
121			doarray(ac, av, ai) /* make array */
122			char **av;
123			int ac, ai;
124			{
125			char newav[256], *avp;
126			char newid[128], repts[32];
127			char *oldid = NULL;
128			int i, err;
129
130			avp = newav+2;
131			avp[0] = av[0];
132			for (i = 1; i < ac; i++)
133			if (!strcmp(av[i-1], "-n")) {
134			oldid = av[i];
135			avp[i] = newid;
136			} else
137			avp[i] = av[i];
138			avp[ai] = "-i";
139			avp[ai+1] = repts;
140			avp[i] = NULL;
141			if (oldid == NULL) {
142			newav[0] = av[0];
143			newav[1] = "-n";
144			newav[2] = newid;
145			avp = newav;
146			ac += 2;
147			}
148			err = 0;
149			for (i = 0; i < atoi(av[ai+1]); i++) {
150			if (oldid == NULL)
151			sprintf(newid, "a%d", i);
152			else
153			sprintf(newid, "%s.%d", oldid, i);
154			sprintf(repts, "%d", i);
155			err \|= main(ac, avp);
156			}
157			return(err);
158	greg	1.1	}
159
160
161	greg	1.12	xform(name, fin) /* transform stream by tot.xfm */
162	greg	1.1	char *name;
163			register FILE *fin;
164			{
165			register int c;
166
167			while ((c = getc(fin)) != EOF) {
168			if (isspace(c)) /* blank */
169			continue;
170			if (c == '#') { /* comment */
171			putchar(c);
172			do {
173			if ((c = getc(fin)) == EOF)
174			return;
175			putchar(c);
176			} while (c != '\n');
177			} else if (c == '!') { /* command */
178			ungetc(c, fin);
179	greg	1.7	xfcomm(name, fin);
180	greg	1.1	} else { /* object */
181			ungetc(c, fin);
182			xfobject(name, fin);
183			}
184			}
185			}
186
187
188	greg	1.7	xfcomm(fname, fin) /* transform a command */
189	greg	1.1	FILE *fin;
190			{
191			FILE *popen();
192	greg	1.7	char *fgetline();
193	greg	1.1	FILE *pin;
194			char buf[512];
195	greg	1.7	int i;
196	greg	1.1
197	greg	1.7	fgetline(buf, sizeof(buf), fin);
198			if (expand) {
199	greg	1.10	if (xac > 2) {
200			if ((pin = popen(buf+1, "r")) == NULL) {
201			fprintf(stderr,
202			"%s: (%s): cannot execute \"%s\"\n",
203			progname, fname, buf);
204			exit(1);
205			}
206			xform(buf, pin);
207			pclose(pin);
208			} else {
209			fflush(stdout);
210			system(buf+1);
211	greg	1.7	}
212			} else {
213	greg	1.10	printf("\n%s", buf);
214			if (xac > 1) {
215			printf(" \| %s -e", xav[0]);
216			for (i = 1; i < xac; i++)
217			printf(" %s", xav[i]);
218			}
219	greg	1.7	putchar('\n');
220	greg	1.1	}
221			}
222
223
224			xfobject(fname, fin) /* transform an object */
225			char *fname;
226			FILE *fin;
227			{
228	greg	1.13	char typ[16], nam[MAXSTR];
229	greg	1.1	int fn;
230	greg	1.13	/* modifier and type */
231			fscanf(fin, "%s %s", nam, typ);
232			if ((fn = otype(typ)) < 0) {
233	greg	1.1	fprintf(stderr, "%s: (%s): unknown object type \"%s\"\n",
234	greg	1.13	progname, fname, typ);
235	greg	1.1	exit(1);
236			}
237	greg	1.13	printf("\n%s %s ", newmod!=NULL && issurface(fn) ? newmod : nam, typ);
238			/* object name */
239			fscanf(fin, "%s", nam);
240	greg	1.1	if (idprefix != NULL && issurface(fn))
241	greg	1.13	printf("%s.%s\n", idprefix, nam);
242	greg	1.1	else
243	greg	1.13	printf("%s\n", nam);
244			/* transform arguments */
245	greg	1.1	if ((*ofun[fn].funp)(fin) < 0) {
246			fprintf(stderr, "%s: (%s): bad %s \"%s\"\n",
247	greg	1.13	progname, fname, ofun[fn].funame, nam);
248	greg	1.1	exit(1);
249			}
250			}
251
252
253	greg	1.11	o_default(fin) /* pass on arguments unchanged */
254	greg	1.1	FILE *fin;
255			{
256			register int i;
257	greg	1.14	FUNARGS fa;
258	greg	1.1
259	greg	1.14	if (readfargs(&fa, fin) <= 0)
260	greg	1.1	return(-1);
261			/* string arguments */
262	greg	1.14	printf("%d", fa.nsargs);
263			for (i = 0; i < fa.nsargs; i++)
264			printf(" %s", fa.sarg[i]);
265	greg	1.1	printf("\n");
266	greg	1.14	#ifdef IARGS
267	greg	1.1	/* integer arguments */
268	greg	1.14	printf("%d", fa.niargs);
269			for (i = 0; i < fa.niargs; i++)
270			printf(" %d", fa.iarg[i]);
271	greg	1.1	printf("\n");
272	greg	1.14	#endif
273	greg	1.1	/* float arguments */
274	greg	1.14	printf("%d", fa.nfargs);
275			for (i = 0; i < fa.nfargs; i++)
276			printf(" %18.12g", fa.farg[i]);
277	greg	1.1	printf("\n");
278	greg	1.14	freefargs(&fa);
279	greg	1.1	return(0);
280			}
281
282
283			addxform(fin) /* add xf arguments to strings */
284			FILE *fin;
285			{
286			register int i;
287	greg	1.14	FUNARGS fa;
288	greg	1.1
289	greg	1.14	if (readfargs(&fa, fin) <= 0)
290	greg	1.1	return(-1);
291			/* string arguments */
292	greg	1.14	printf("%d", fa.nsargs + xac-xfa);
293			for (i = 0; i < fa.nsargs; i++)
294			printf(" %s", fa.sarg[i]);
295	greg	1.1	for (i = xfa; i < xac; i++) /* add xf arguments */
296			printf(" %s", xav[i]);
297			printf("\n");
298	greg	1.14	#ifdef IARGS
299	greg	1.1	/* integer arguments */
300	greg	1.14	printf("%d", fa.niargs);
301			for (i = 0; i < fa.niargs; i++)
302			printf(" %d", fa.iarg[i]);
303	greg	1.1	printf("\n");
304	greg	1.14	#endif
305	greg	1.1	/* float arguments */
306	greg	1.14	printf("%d", fa.nfargs);
307			for (i = 0; i < fa.nfargs; i++)
308			printf(" %18.12g", fa.farg[i]);
309	greg	1.1	printf("\n");
310	greg	1.14	freefargs(&fa);
311	greg	1.1	return(0);
312			}
313
314
315			int
316			otype(ofname) /* get object function number from its name */
317			register char *ofname;
318			{
319			register int i;
320
321	greg	1.11	for (i = 0; i < NUMTYPES; i++)
322	greg	1.1	if (!strcmp(ofun[i].funame, ofname))
323			return(i);
324
325			return(-1); /* not found */
326			}
327
328
329			alias(fin) /* transfer alias */
330			FILE *fin;
331			{
332	greg	1.12	char aliasnm[MAXSTR];
333	greg	1.1
334	greg	1.12	if (fscanf(fin, "%s", aliasnm) != 1)
335	greg	1.1	return(-1);
336	greg	1.12	printf("\t%s\n", aliasnm);
337	greg	1.5	return(0);
338			}
339
340
341			m_glow(fin) /* transform arguments for proximity light */
342			FILE *fin;
343			{
344	greg	1.14	FUNARGS fa;
345	greg	1.5
346	greg	1.14	if (readfargs(&fa, fin) <= 0)
347	greg	1.5	return(-1);
348	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 4)
349	greg	1.5	return(-1);
350			printf("0\n0\n4");
351			printf(" %18.12g %18.12g %18.12g",
352	greg	1.14	fa.farg[0], fa.farg[1], fa.farg[2]);
353			printf(" %18.12g\n", fa.farg[3] * tot.sca);
354			freefargs(&fa);
355	greg	1.5	return(0);
356			}
357
358
359			m_spot(fin) /* transform arguments for spotlight */
360			FILE *fin;
361			{
362			double v[3];
363	greg	1.14	FUNARGS fa;
364	greg	1.5
365	greg	1.14	if (readfargs(&fa, fin) <= 0)
366	greg	1.5	return(-1);
367	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 7)
368	greg	1.5	return(-1);
369			printf("0\n0\n7");
370			printf(" %18.12g %18.12g %18.12g %18.12g\n",
371	greg	1.14	fa.farg[0], fa.farg[1], fa.farg[2], fa.farg[3]);
372			multv3(v, fa.farg+4, tot.xfm);
373	greg	1.5	printf("\t%18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
374	greg	1.14	freefargs(&fa);
375	greg	1.1	return(0);
376			}
377
378
379			m_dielectric(fin) /* transform arguments for dielectric */
380			FILE *fin;
381			{
382			double pow();
383	greg	1.14	FUNARGS fa;
384	greg	1.1
385	greg	1.14	if (readfargs(&fa, fin) <= 0)
386	greg	1.1	return(-1);
387	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 5)
388	greg	1.1	return(-1);
389			printf("0\n0\n5");
390			printf(" %18.12g %18.12g %18.12g",
391	greg	1.14	pow(fa.farg[0], 1.0/tot.sca),
392			pow(fa.farg[1], 1.0/tot.sca),
393			pow(fa.farg[2], 1.0/tot.sca));
394			printf(" %18.12g %18.12g\n", fa.farg[3], fa.farg[4]);
395			freefargs(&fa);
396	greg	1.1	return(0);
397			}
398
399
400			m_interface(fin) /* transform arguments for interface */
401			FILE *fin;
402			{
403			double pow();
404	greg	1.14	FUNARGS fa;
405	greg	1.1
406	greg	1.14	if (readfargs(&fa, fin) <= 0)
407	greg	1.1	return(-1);
408	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 8)
409	greg	1.1	return(-1);
410			printf("0\n0\n8\n");
411			printf("%18.12g %18.12g %18.12g",
412	greg	1.14	pow(fa.farg[0], 1.0/tot.sca),
413			pow(fa.farg[1], 1.0/tot.sca),
414			pow(fa.farg[2], 1.0/tot.sca));
415			printf(" %18.12g\n", fa.farg[3]);
416	greg	1.1	printf("%18.12g %18.12g %18.12g",
417	greg	1.14	pow(fa.farg[4], 1.0/tot.sca),
418			pow(fa.farg[5], 1.0/tot.sca),
419			pow(fa.farg[6], 1.0/tot.sca));
420			printf(" %18.12g\n", fa.farg[7]);
421			freefargs(&fa);
422	greg	1.1	return(0);
423			}
424
425
426			text(fin) /* transform text arguments */
427			FILE *fin;
428			{
429			int i;
430			double v[3];
431	greg	1.14	FUNARGS fa;
432	greg	1.1
433	greg	1.14	if (readfargs(&fa, fin) <= 0)
434	greg	1.1	return(-1);
435	greg	1.14	if (fa.nfargs != 9 && fa.nfargs != 11 && fa.nfargs != 15)
436	greg	1.1	return(-1);
437			/* string arguments */
438	greg	1.14	printf("%d", fa.nsargs);
439			for (i = 0; i < fa.nsargs; i++)
440			printf(" %s", fa.sarg[i]);
441			printf("\n0\n%d\n", fa.nfargs);
442	greg	1.1	/* anchor point */
443	greg	1.14	multp3(v, fa.farg, tot.xfm);
444	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
445			/* right vector */
446	greg	1.14	multv3(v, fa.farg+3, tot.xfm);
447	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
448			/* down vector */
449	greg	1.14	multv3(v, fa.farg+6, tot.xfm);
450	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", v[0], v[1], v[2]);
451			/* forground and background */
452	greg	1.14	if (fa.nfargs == 11)
453			printf(" %18.12g %18.12g\n", fa.farg[9], fa.farg[10]);
454			else if (fa.nfargs == 15) {
455	greg	1.1	printf(" %18.12g %18.12g %18.12g\n",
456	greg	1.14	fa.farg[9], fa.farg[10], fa.farg[11]);
457	greg	1.1	printf(" %18.12g %18.12g %18.12g\n",
458	greg	1.14	fa.farg[12], fa.farg[13], fa.farg[14]);
459	greg	1.1	}
460	greg	1.14	freefargs(&fa);
461	greg	1.1	return(0);
462			}
463
464
465			o_source(fin) /* transform source arguments */
466			FILE *fin;
467			{
468			double dv[3];
469	greg	1.14	FUNARGS fa;
470	greg	1.1
471	greg	1.14	if (readfargs(&fa, fin) <= 0)
472	greg	1.1	return(-1);
473	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 4)
474	greg	1.1	return(-1);
475			/* transform direction vector */
476	greg	1.14	multv3(dv, fa.farg, tot.xfm);
477	greg	1.1	/* output */
478			printf("0\n0\n4");
479			printf(" %18.12g %18.12g %18.12g %18.12g\n",
480	greg	1.14	dv[0], dv[1], dv[2], fa.farg[3]);
481			freefargs(&fa);
482	greg	1.1	return(0);
483			}
484
485
486			o_sphere(fin) /* transform sphere arguments */
487			FILE *fin;
488			{
489			double cent[3], rad;
490	greg	1.14	FUNARGS fa;
491	greg	1.1
492	greg	1.14	if (readfargs(&fa, fin) <= 0)
493	greg	1.1	return(-1);
494	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 4)
495	greg	1.1	return(-1);
496
497	greg	1.14	multp3(cent, fa.farg, tot.xfm); /* transform center */
498	greg	1.1
499	greg	1.14	rad = fa.farg[3] * tot.sca; /* scale radius */
500	greg	1.1
501			printf("0\n0\n4");
502			printf(" %18.12g %18.12g %18.12g %18.12g\n",
503			cent[0], cent[1], cent[2], rad);
504	greg	1.14	freefargs(&fa);
505	greg	1.1	return(0);
506			}
507
508
509			o_face(fin) /* transform face arguments */
510			FILE *fin;
511			{
512			double p[3];
513			register int i;
514	greg	1.14	FUNARGS fa;
515	greg	1.1
516	greg	1.14	if (readfargs(&fa, fin) <= 0)
517	greg	1.1	return(-1);
518	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs % 3)
519	greg	1.1	return(-1);
520
521	greg	1.14	printf("0\n0\n%d\n", fa.nfargs);
522	greg	1.1
523	greg	1.14	for (i = 0; i < fa.nfargs; i += 3) {
524	greg	1.1	if (reverse)
525	greg	1.14	multp3(p, fa.farg+(fa.nfargs-i-3), tot.xfm);
526	greg	1.1	else
527	greg	1.14	multp3(p, fa.farg+i, tot.xfm);
528	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p[0], p[1], p[2]);
529			}
530	greg	1.14	freefargs(&fa);
531	greg	1.1	return(0);
532			}
533
534
535			o_cone(fin) /* transform cone and cup arguments */
536			FILE *fin;
537			{
538			double p0[3], p1[3], r0, r1;
539	greg	1.14	FUNARGS fa;
540	greg	1.1
541	greg	1.14	if (readfargs(&fa, fin) <= 0)
542	greg	1.1	return(-1);
543	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 8)
544	greg	1.1	return(-1);
545
546			printf("0\n0\n8\n");
547
548	greg	1.14	multp3(p0, fa.farg, tot.xfm);
549			multp3(p1, fa.farg+3, tot.xfm);
550			r0 = fa.farg[6] * tot.sca;
551			r1 = fa.farg[7] * tot.sca;
552	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
553			printf(" %18.12g %18.12g %18.12g\n", p1[0], p1[1], p1[2]);
554			printf(" %18.12g %18.12g\n", r0, r1);
555
556	greg	1.14	freefargs(&fa);
557	greg	1.1	return(0);
558			}
559
560
561			o_cylinder(fin) /* transform cylinder and tube arguments */
562			FILE *fin;
563			{
564			double p0[3], p1[3], rad;
565	greg	1.14	FUNARGS fa;
566	greg	1.1
567	greg	1.14	if (readfargs(&fa, fin) <= 0)
568	greg	1.1	return(-1);
569	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 7)
570	greg	1.1	return(-1);
571
572			printf("0\n0\n7\n");
573
574	greg	1.14	multp3(p0, fa.farg, tot.xfm);
575			multp3(p1, fa.farg+3, tot.xfm);
576			rad = fa.farg[6] * tot.sca;
577	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
578			printf(" %18.12g %18.12g %18.12g\n", p1[0], p1[1], p1[2]);
579			printf(" %18.12g\n", rad);
580	greg	1.14	freefargs(&fa);
581	greg	1.1	return(0);
582			}
583
584
585			o_ring(fin) /* transform ring arguments */
586			FILE *fin;
587			{
588			double p0[3], pd[3], r0, r1;
589	greg	1.14	FUNARGS fa;
590	greg	1.1
591	greg	1.14	if (readfargs(&fa, fin) <= 0)
592	greg	1.1	return(-1);
593	greg	1.14	if (fa.nsargs != 0 \|\| fa.nfargs != 8)
594	greg	1.1	return(-1);
595
596			printf("0\n0\n8\n");
597
598	greg	1.14	multp3(p0, fa.farg, tot.xfm);
599			multv3(pd, fa.farg+3, tot.xfm);
600			r0 = fa.farg[6] * tot.sca;
601			r1 = fa.farg[7] * tot.sca;
602	greg	1.1	printf(" %18.12g %18.12g %18.12g\n", p0[0], p0[1], p0[2]);
603			printf(" %18.12g %18.12g %18.12g\n", pd[0], pd[1], pd[2]);
604			printf(" %18.12g %18.12g\n", r0, r1);
605	greg	1.14	freefargs(&fa);
606	greg	1.1	return(0);
607	greg	1.11	}
608
609
610			initotypes() /* initialize ofun[] array */
611			{
612			extern int o_source();
613			extern int o_sphere();
614			extern int o_face();
615			extern int o_cone();
616			extern int o_cylinder();
617			extern int o_ring();
618			extern int m_glow();
619			extern int m_spot();
620			extern int m_dielectric();
621			extern int m_interface();
622			extern int text();
623			extern int alias();
624			extern int passargs();
625			extern int addxform();
626			register int i;
627
628			if (ofun[OBJ_SOURCE].funp == o_source)
629			return; /* done already */
630			/* alias is additional */
631			ofun[ALIAS].funame = ALIASID;
632			ofun[ALIAS].flags = 0;
633			/* functions get new transform */
634			for (i = 0; i < NUMTYPES; i++)
635			if (hasfunc(i))
636			ofun[i].funp = addxform;
637			/* special cases */
638			ofun[OBJ_SOURCE].funp = o_source;
639			ofun[OBJ_SPHERE].funp =
640			ofun[OBJ_BUBBLE].funp = o_sphere;
641			ofun[OBJ_FACE].funp = o_face;
642			ofun[OBJ_CONE].funp =
643			ofun[OBJ_CUP].funp = o_cone;
644			ofun[OBJ_CYLINDER].funp =
645			ofun[OBJ_TUBE].funp = o_cylinder;
646			ofun[OBJ_RING].funp = o_ring;
647			ofun[OBJ_INSTANCE].funp = addxform;
648			ofun[MAT_GLOW].funp = m_glow;
649			ofun[MAT_SPOT].funp = m_spot;
650			ofun[MAT_DIELECTRIC].funp = m_dielectric;
651			ofun[MAT_INTERFACE].funp = m_interface;
652			ofun[PAT_CTEXT].funp =
653			ofun[PAT_BTEXT].funp =
654			ofun[MIX_TEXT].funp = text;
655			ofun[ALIAS].funp = alias;
656	greg	1.1	}