src/rt/rtrace.c

/* Copyright (c) 1994 Regents of the University of California */

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

/*
 *  rtrace.c - program and variables for individual ray tracing.
 *
 *     6/11/86
 */

/*
 *  Input is in the form:
 *
 *      xorg    yorg    zorg    xdir    ydir    zdir
 *
 *  The direction need not be normalized.  Output is flexible.
 *  If the direction vector is (0,0,0), then the output is flushed.
 *  All values default to ascii representation of real
 *  numbers.  Binary representations can be selected
 *  with '-ff' for float or '-fd' for double.  By default,
 *  radiance is computed.  The '-i' or '-I' options indicate that
 *  irradiance values are desired.
 */

#include  "ray.h"

#include  "octree.h"

#include  "otypes.h"

#include  "resolu.h"

int  dimlist[MAXDIM];                   /* sampling dimensions */
int  ndims = 0;                         /* number of sampling dimensions */
int  samplendx = 0;                     /* index for this sample */

int  imm_irrad = 0;                     /* compute immediate irradiance? */

int  inform = 'a';                      /* input format */
int  outform = 'a';                     /* output format */
char  *outvals = "v";                   /* output specification */

char  *tralist[128];                    /* list of modifers to trace (or no) */
int  traincl = -1;                      /* include == 1, exclude == 0 */
#define  MAXTSET        511             /* maximum number in trace set */
OBJECT  traset[MAXTSET+1]={0};          /* trace include/exclude set */

int  hresolu = 0;                       /* horizontal (scan) size */
int  vresolu = 0;                       /* vertical resolution */

double  dstrsrc = 0.0;                  /* square source distribution */
double  shadthresh = .05;               /* shadow threshold */
double  shadcert = .5;                  /* shadow certainty */
int  directrelay = 2;                   /* number of source relays */
int  vspretest = 512;                   /* virtual source pretest density */
int  directvis = 1;                     /* sources visible? */
double  srcsizerat = .2;                /* maximum ratio source size/dist. */

double  specthresh = .15;               /* specular sampling threshold */
double  specjitter = 1.;                /* specular sampling jitter */

int  backvis = 1;                       /* back face visibility */

int  maxdepth = 6;                      /* maximum recursion depth */
double  minweight = 4e-3;               /* minimum ray weight */

COLOR  ambval = BLKCOLOR;               /* ambient value */
double  ambacc = 0.2;                   /* ambient accuracy */
int  ambres = 128;                      /* ambient resolution */
int  ambdiv = 512;                      /* ambient divisions */
int  ambssamp = 0;                      /* ambient super-samples */
int  ambounce = 0;                      /* ambient bounces */
char  *amblist[128];                    /* ambient include/exclude list */
int  ambincl = -1;                      /* include == 1, exclude == 0 */

extern OBJREC  Lamb;                    /* a Lambertian surface */

static RAY  thisray;                    /* for our convenience */

static int  oputo(), oputd(), oputv(), oputl(), oputL(),
                oputp(), oputn(), oputN(), oputs(), oputw(), oputm();

static int  ourtrace(), tabin();
static int  (*ray_out[16])(), (*every_out[16])();
static int  castonly = 0;

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

static int  (*putreal)();


quit(code)                      /* quit program */
int  code;
{
#ifndef  NIX
        headclean();            /* delete header file */
        pfclean();              /* clean up persist files */
#endif
        exit(code);
}


char *
formstr(f)                              /* return format identifier */
int  f;
{
        switch (f) {
        case 'a': return("ascii");
        case 'f': return("float");
        case 'd': return("double");
        case 'c': return(COLRFMT);
        }
        return("unknown");
}


rtrace(fname)                           /* trace rays from file */
char  *fname;
{
        long  vcount = hresolu>1 ? hresolu*vresolu : vresolu;
        long  nextflush = hresolu;
        FILE  *fp;
        FVECT  orig, direc;
                                        /* set up input */
        if (fname == NULL)
                fp = stdin;
        else if ((fp = fopen(fname, "r")) == NULL) {
                sprintf(errmsg, "cannot open input file \"%s\"", fname);
                error(SYSTEM, errmsg);
        }
#ifdef MSDOS
        if (inform != 'a')
                setmode(fileno(fp), O_BINARY);
#endif
                                        /* set up output */
        setoutput(outvals);
        switch (outform) {
        case 'a': putreal = puta; break;
        case 'f': putreal = putf; break;
        case 'd': putreal = putd; break;
        case 'c': 
                if (strcmp(outvals, "v"))
                        error(USER, "color format with value output only");
                break;
        default:
                error(CONSISTENCY, "botched output format");
        }
        if (hresolu > 0) {
                if (vresolu > 0)
                        fprtresolu(hresolu, vresolu, stdout);
                fflush(stdout);
        }
                                        /* process file */
        while (getvec(orig, inform, fp) == 0 &&
                        getvec(direc, inform, fp) == 0) {

                if (normalize(direc) == 0.0) {          /* zero ==> flush */
                        fflush(stdout);
                        continue;
                }
                samplendx++;
                                                        /* compute and print */
                if (imm_irrad)
                        irrad(orig, direc);
                else
                        rad(orig, direc);
                                                        /* flush if time */
                if (--nextflush == 0) {
                        fflush(stdout);
                        nextflush = hresolu;
                }
                if (ferror(stdout))
                        error(SYSTEM, "write error");
                if (--vcount == 0)                      /* check for end */
                        break;
        }
        fflush(stdout);
        if (vcount > 0)
                error(USER, "read error");
        if (fname != NULL)
                fclose(fp);
}


setoutput(vs)                           /* set up output tables */
register char  *vs;
{
        extern int  (*trace)();
        register int (**table)() = ray_out;

        castonly = 1;
        while (*vs)
                switch (*vs++) {
                case 't':                               /* trace */
                        *table = NULL;
                        table = every_out;
                        trace = ourtrace;
                        castonly = 0;
                        break;
                case 'o':                               /* origin */
                        *table++ = oputo;
                        break;
                case 'd':                               /* direction */
                        *table++ = oputd;
                        break;
                case 'v':                               /* value */
                        *table++ = oputv;
                        castonly = 0;
                        break;
                case 'l':                               /* effective distance */
                        *table++ = oputl;
                        castonly = 0;
                        break;
                case 'L':                               /* single ray length */
                        *table++ = oputL;
                        break;
                case 'p':                               /* point */
                        *table++ = oputp;
                        break;
                case 'n':                               /* perturbed normal */
                        *table++ = oputn;
                        castonly = 0;
                        break;
                case 'N':                               /* unperturbed normal */
                        *table++ = oputN;
                        break;
                case 's':                               /* surface */
                        *table++ = oputs;
                        break;
                case 'w':                               /* weight */
                        *table++ = oputw;
                        break;
                case 'm':                               /* modifier */
                        *table++ = oputm;
                        break;
                }
        *table = NULL;
}


rad(org, dir)                   /* compute and print ray value(s) */
FVECT  org, dir;
{
        VCOPY(thisray.rorg, org);
        VCOPY(thisray.rdir, dir);
        thisray.rmax = 0.0;
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        if (castonly)
                localhit(&thisray, &thescene) || sourcehit(&thisray);
        else
                rayvalue(&thisray);
        printvals(&thisray);
}


irrad(org, dir)                 /* compute immediate irradiance value */
FVECT  org, dir;
{
        register int  i;

        for (i = 0; i < 3; i++) {
                thisray.rorg[i] = org[i] + dir[i];
                thisray.rdir[i] = -dir[i];
        }
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
                                        /* pretend we hit surface */
        thisray.rot = 1.0-1e-4;
        thisray.rod = 1.0;
        VCOPY(thisray.ron, dir);
        for (i = 0; i < 3; i++)         /* fudge factor */
                thisray.rop[i] = org[i] + 1e-4*dir[i];
                                        /* compute and print */
        (*ofun[Lamb.otype].funp)(&Lamb, &thisray);
        printvals(&thisray);
}


printvals(r)                    /* print requested ray values */
RAY  *r;
{
        register int  (**tp)();

        if (ray_out[0] == NULL)
                return;
        for (tp = ray_out; *tp != NULL; tp++)
                (**tp)(r);
        if (outform == 'a')
                putchar('\n');
}


getvec(vec, fmt, fp)            /* get a vector from fp */
register FVECT  vec;
int  fmt;
FILE  *fp;
{
        extern char  *fgetword();
        static float  vf[3];
        static double  vd[3];
        char  buf[32];
        register int  i;

        switch (fmt) {
        case 'a':                                       /* ascii */
                for (i = 0; i < 3; i++) {
                        if (fgetword(buf, sizeof(buf), fp) == NULL ||
                                        !isflt(buf))
                                return(-1);
                        vec[i] = atof(buf);
                }
                break;
        case 'f':                                       /* binary float */
                if (fread((char *)vf, sizeof(float), 3, fp) != 3)
                        return(-1);
                vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
                break;
        case 'd':                                       /* binary double */
                if (fread((char *)vd, sizeof(double), 3, fp) != 3)
                        return(-1);
                vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
                break;
        default:
                error(CONSISTENCY, "botched input format");
        }
        return(0);
}


tranotify(obj)                  /* record new modifier */
OBJECT  obj;
{
        static int  hitlimit = 0;
        register OBJREC  *o = objptr(obj);
        register char  **tralp;

        if (hitlimit || !ismodifier(o->otype))
                return;
        for (tralp = tralist; *tralp != NULL; tralp++)
                if (!strcmp(o->oname, *tralp)) {
                        if (traset[0] >= MAXTSET) {
                                error(WARNING, "too many modifiers in trace list");
                                hitlimit++;
                                return;         /* should this be fatal? */
                        }
                        insertelem(traset, obj);
                        return;
                }
}


static
ourtrace(r)                             /* print ray values */
RAY  *r;
{
        register int  (**tp)();

        if (every_out[0] == NULL)
                return;
        if (r->ro == NULL) {
                if (traincl == 1)
                        return;
        } else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
                return;
        tabin(r);
        for (tp = every_out; *tp != NULL; tp++)
                (**tp)(r);
        putchar('\n');
}


static
tabin(r)                                /* tab in appropriate amount */
RAY  *r;
{
        register RAY  *rp;

        for (rp = r->parent; rp != NULL; rp = rp->parent)
                putchar('\t');
}


static
oputo(r)                                /* print origin */
register RAY  *r;
{
        (*putreal)(r->rorg[0]);
        (*putreal)(r->rorg[1]);
        (*putreal)(r->rorg[2]);
}


static
oputd(r)                                /* print direction */
register RAY  *r;
{
        (*putreal)(r->rdir[0]);
        (*putreal)(r->rdir[1]);
        (*putreal)(r->rdir[2]);
}


static
oputv(r)                                /* print value */
register RAY  *r;
{
        COLR  cout;
        
        if (outform == 'c') {
                setcolr(cout,   colval(r->rcol,RED),
                                colval(r->rcol,GRN),
                                colval(r->rcol,BLU));
                fwrite((char *)cout, sizeof(cout), 1, stdout);
                return;
        }
        (*putreal)(colval(r->rcol,RED));
        (*putreal)(colval(r->rcol,GRN));
        (*putreal)(colval(r->rcol,BLU));
}


static
oputl(r)                                /* print effective distance */
register RAY  *r;
{
        (*putreal)(r->rt);
}


static
oputL(r)                                /* print single ray length */
register RAY  *r;
{
        (*putreal)(r->rot);
}


static
oputp(r)                                /* print point */
register RAY  *r;
{
        if (r->rot < FHUGE) {
                (*putreal)(r->rop[0]);
                (*putreal)(r->rop[1]);
                (*putreal)(r->rop[2]);
        } else {
                (*putreal)(0.0);
                (*putreal)(0.0);
                (*putreal)(0.0);
        }
}


static
oputN(r)                                /* print unperturbed normal */
register RAY  *r;
{
        if (r->rot < FHUGE) {
                (*putreal)(r->ron[0]);
                (*putreal)(r->ron[1]);
                (*putreal)(r->ron[2]);
        } else {
                (*putreal)(0.0);
                (*putreal)(0.0);
                (*putreal)(0.0);
        }
}


static
oputn(r)                                /* print perturbed normal */
RAY  *r;
{
        FVECT  pnorm;

        if (r->rot >= FHUGE) {
                (*putreal)(0.0);
                (*putreal)(0.0);
                (*putreal)(0.0);
                return;
        }
        raynormal(pnorm, r);
        (*putreal)(pnorm[0]);
        (*putreal)(pnorm[1]);
        (*putreal)(pnorm[2]);
}


static
oputs(r)                                /* print name */
register RAY  *r;
{
        if (r->ro != NULL)
                fputs(r->ro->oname, stdout);
        else
                putchar('*');
        putchar('\t');
}


static
oputw(r)                                /* print weight */
register RAY  *r;
{
        (*putreal)(r->rweight);
}


static
oputm(r)                                /* print modifier */
register RAY  *r;
{
        if (r->ro != NULL)
                fputs(objptr(r->ro->omod)->oname, stdout);
        else
                putchar('*');
        putchar('\t');
}


static
puta(v)                         /* print ascii value */
double  v;
{
        printf("%e\t", v);
}


static
putd(v)                         /* print binary double */
double  v;
{
        fwrite((char *)&v, sizeof(v), 1, stdout);
}


static
putf(v)                         /* print binary float */
double  v;
{
        float f = v;

        fwrite((char *)&f, sizeof(f), 1, stdout);
}
Revision:	2.19
Committed:	Mon Aug 21 10:29:20 1995 UTC (28 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.18:	+4 -4 lines
Log Message:	increase default parameters for more accurate calculations
#	User	Rev	Content
1	greg	2.17	/* Copyright (c) 1994 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* rtrace.c - program and variables for individual ray tracing.
9			*
10			* 6/11/86
11			*/
12
13			/*
14			* Input is in the form:
15			*
16			* xorg yorg zorg xdir ydir zdir
17			*
18			* The direction need not be normalized. Output is flexible.
19	greg	1.7	* If the direction vector is (0,0,0), then the output is flushed.
20	greg	1.1	* All values default to ascii representation of real
21			* numbers. Binary representations can be selected
22			* with '-ff' for float or '-fd' for double. By default,
23	greg	1.13	* radiance is computed. The '-i' or '-I' options indicate that
24	greg	1.1	* irradiance values are desired.
25			*/
26
27			#include "ray.h"
28
29	greg	1.11	#include "octree.h"
30
31	greg	1.1	#include "otypes.h"
32
33	greg	2.6	#include "resolu.h"
34
35	greg	1.14	int dimlist[MAXDIM]; /* sampling dimensions */
36			int ndims = 0; /* number of sampling dimensions */
37			int samplendx = 0; /* index for this sample */
38
39	greg	1.13	int imm_irrad = 0; /* compute immediate irradiance? */
40
41	greg	1.1	int inform = 'a'; /* input format */
42			int outform = 'a'; /* output format */
43			char outvals = "v"; / output specification */
44
45	greg	2.15	char tralist[128]; / list of modifers to trace (or no) */
46			int traincl = -1; /* include == 1, exclude == 0 */
47			#define MAXTSET 511 /* maximum number in trace set */
48			OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
49
50	greg	1.1	int hresolu = 0; /* horizontal (scan) size */
51			int vresolu = 0; /* vertical resolution */
52
53			double dstrsrc = 0.0; /* square source distribution */
54	greg	1.4	double shadthresh = .05; /* shadow threshold */
55	greg	1.5	double shadcert = .5; /* shadow certainty */
56	greg	2.19	int directrelay = 2; /* number of source relays */
57	greg	1.17	int vspretest = 512; /* virtual source pretest density */
58	greg	2.10	int directvis = 1; /* sources visible? */
59	greg	2.19	double srcsizerat = .2; /* maximum ratio source size/dist. */
60	greg	1.1
61	greg	2.4	double specthresh = .15; /* specular sampling threshold */
62	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
63
64	greg	2.18	int backvis = 1; /* back face visibility */
65
66	greg	1.1	int maxdepth = 6; /* maximum recursion depth */
67			double minweight = 4e-3; /* minimum ray weight */
68
69			COLOR ambval = BLKCOLOR; /* ambient value */
70			double ambacc = 0.2; /* ambient accuracy */
71	greg	2.19	int ambres = 128; /* ambient resolution */
72			int ambdiv = 512; /* ambient divisions */
73	greg	1.1	int ambssamp = 0; /* ambient super-samples */
74			int ambounce = 0; /* ambient bounces */
75			char amblist[128]; / ambient include/exclude list */
76			int ambincl = -1; /* include == 1, exclude == 0 */
77
78	greg	1.13	extern OBJREC Lamb; /* a Lambertian surface */
79
80	greg	1.1	static RAY thisray; /* for our convenience */
81
82	greg	2.5	static int oputo(), oputd(), oputv(), oputl(), oputL(),
83	greg	2.9	oputp(), oputn(), oputN(), oputs(), oputw(), oputm();
84	greg	1.1
85	greg	2.13	static int ourtrace(), tabin();
86	greg	2.14	static int (ray_out[16])(), (every_out[16])();
87			static int castonly = 0;
88	greg	1.1
89	greg	1.10	static int puta(), putf(), putd();
90	greg	1.1
91			static int (*putreal)();
92
93
94			quit(code) /* quit program */
95			int code;
96			{
97	greg	2.11	#ifndef NIX
98			headclean(); /* delete header file */
99			pfclean(); /* clean up persist files */
100			#endif
101	greg	1.1	exit(code);
102			}
103
104
105	greg	2.6	char *
106			formstr(f) /* return format identifier */
107			int f;
108			{
109			switch (f) {
110			case 'a': return("ascii");
111			case 'f': return("float");
112			case 'd': return("double");
113			case 'c': return(COLRFMT);
114			}
115			return("unknown");
116			}
117
118
119	greg	1.1	rtrace(fname) /* trace rays from file */
120			char *fname;
121			{
122			long vcount = hresolu>1 ? hresolu*vresolu : vresolu;
123			long nextflush = hresolu;
124			FILE *fp;
125	greg	1.2	FVECT orig, direc;
126	greg	1.1	/* set up input */
127			if (fname == NULL)
128			fp = stdin;
129			else if ((fp = fopen(fname, "r")) == NULL) {
130			sprintf(errmsg, "cannot open input file \"%s\"", fname);
131			error(SYSTEM, errmsg);
132			}
133	greg	2.8	#ifdef MSDOS
134			if (inform != 'a')
135			setmode(fileno(fp), O_BINARY);
136			#endif
137	greg	1.1	/* set up output */
138	greg	2.16	setoutput(outvals);
139	greg	1.1	switch (outform) {
140			case 'a': putreal = puta; break;
141			case 'f': putreal = putf; break;
142			case 'd': putreal = putd; break;
143	greg	2.6	case 'c':
144			if (strcmp(outvals, "v"))
145			error(USER, "color format with value output only");
146			break;
147			default:
148			error(CONSISTENCY, "botched output format");
149	greg	1.1	}
150	greg	2.12	if (hresolu > 0) {
151			if (vresolu > 0)
152			fprtresolu(hresolu, vresolu, stdout);
153			fflush(stdout);
154			}
155	greg	1.1	/* process file */
156			while (getvec(orig, inform, fp) == 0 &&
157			getvec(direc, inform, fp) == 0) {
158
159	greg	1.7	if (normalize(direc) == 0.0) { /* zero ==> flush */
160			fflush(stdout);
161			continue;
162			}
163	greg	1.14	samplendx++;
164	greg	1.1	/* compute and print */
165	greg	1.13	if (imm_irrad)
166	greg	1.1	irrad(orig, direc);
167			else
168	greg	2.16	rad(orig, direc);
169	greg	1.7	/* flush if time */
170	greg	1.1	if (--nextflush == 0) {
171			fflush(stdout);
172			nextflush = hresolu;
173			}
174			if (ferror(stdout))
175			error(SYSTEM, "write error");
176			if (--vcount == 0) /* check for end */
177			break;
178			}
179	greg	2.12	fflush(stdout);
180	greg	1.1	if (vcount > 0)
181			error(USER, "read error");
182	greg	2.12	if (fname != NULL)
183			fclose(fp);
184	greg	1.1	}
185
186
187			setoutput(vs) /* set up output tables */
188			register char *vs;
189			{
190	greg	2.13	extern int (*trace)();
191	greg	1.1	register int (**table)() = ray_out;
192
193	greg	1.11	castonly = 1;
194	greg	1.1	while (*vs)
195			switch (*vs++) {
196			case 't': /* trace */
197			*table = NULL;
198			table = every_out;
199			trace = ourtrace;
200	greg	1.11	castonly = 0;
201	greg	1.1	break;
202			case 'o': /* origin */
203			*table++ = oputo;
204			break;
205			case 'd': /* direction */
206			*table++ = oputd;
207			break;
208			case 'v': /* value */
209			*table++ = oputv;
210	greg	1.11	castonly = 0;
211	greg	1.1	break;
212	greg	2.5	case 'l': /* effective distance */
213	greg	1.1	*table++ = oputl;
214	greg	1.11	castonly = 0;
215	greg	1.1	break;
216	greg	2.5	case 'L': /* single ray length */
217			*table++ = oputL;
218			break;
219	greg	1.1	case 'p': /* point */
220			*table++ = oputp;
221			break;
222	greg	2.9	case 'n': /* perturbed normal */
223	greg	1.1	*table++ = oputn;
224	greg	2.9	castonly = 0;
225	greg	1.1	break;
226	greg	2.9	case 'N': /* unperturbed normal */
227			*table++ = oputN;
228			break;
229	greg	1.1	case 's': /* surface */
230			*table++ = oputs;
231			break;
232			case 'w': /* weight */
233			*table++ = oputw;
234			break;
235			case 'm': /* modifier */
236			*table++ = oputm;
237			break;
238			}
239			*table = NULL;
240			}
241
242
243	greg	2.16	rad(org, dir) /* compute and print ray value(s) */
244	greg	1.1	FVECT org, dir;
245			{
246			VCOPY(thisray.rorg, org);
247			VCOPY(thisray.rdir, dir);
248	greg	2.17	thisray.rmax = 0.0;
249	greg	1.1	rayorigin(&thisray, NULL, PRIMARY, 1.0);
250	greg	1.11	if (castonly)
251			localhit(&thisray, &thescene) \|\| sourcehit(&thisray);
252			else
253			rayvalue(&thisray);
254	greg	2.16	printvals(&thisray);
255	greg	1.1	}
256
257
258	greg	1.13	irrad(org, dir) /* compute immediate irradiance value */
259	greg	1.1	FVECT org, dir;
260			{
261			register int i;
262
263			for (i = 0; i < 3; i++) {
264			thisray.rorg[i] = org[i] + dir[i];
265			thisray.rdir[i] = -dir[i];
266			}
267			rayorigin(&thisray, NULL, PRIMARY, 1.0);
268			/* pretend we hit surface */
269	greg	2.16	thisray.rot = 1.0-1e-4;
270	greg	1.1	thisray.rod = 1.0;
271			VCOPY(thisray.ron, dir);
272			for (i = 0; i < 3; i++) /* fudge factor */
273			thisray.rop[i] = org[i] + 1e-4*dir[i];
274			/* compute and print */
275			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
276	greg	2.16	printvals(&thisray);
277			}
278
279
280			printvals(r) /* print requested ray values */
281			RAY *r;
282			{
283			register int (**tp)();
284
285			if (ray_out[0] == NULL)
286			return;
287			for (tp = ray_out; *tp != NULL; tp++)
288			(**tp)(r);
289	greg	1.1	if (outform == 'a')
290			putchar('\n');
291			}
292
293
294			getvec(vec, fmt, fp) /* get a vector from fp */
295			register FVECT vec;
296			int fmt;
297			FILE *fp;
298			{
299	greg	1.19	extern char *fgetword();
300	greg	1.1	static float vf[3];
301	greg	2.5	static double vd[3];
302	greg	1.19	char buf[32];
303			register int i;
304	greg	1.1
305			switch (fmt) {
306			case 'a': /* ascii */
307	greg	1.19	for (i = 0; i < 3; i++) {
308			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
309			!isflt(buf))
310			return(-1);
311			vec[i] = atof(buf);
312			}
313	greg	1.1	break;
314			case 'f': /* binary float */
315	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
316	greg	1.1	return(-1);
317			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
318			break;
319			case 'd': /* binary double */
320	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
321	greg	1.1	return(-1);
322	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
323	greg	1.1	break;
324	greg	2.6	default:
325			error(CONSISTENCY, "botched input format");
326	greg	1.1	}
327			return(0);
328			}
329
330
331	greg	2.15	tranotify(obj) /* record new modifier */
332			OBJECT obj;
333			{
334			static int hitlimit = 0;
335			register OBJREC *o = objptr(obj);
336			register char **tralp;
337
338			if (hitlimit \|\| !ismodifier(o->otype))
339			return;
340			for (tralp = tralist; *tralp != NULL; tralp++)
341			if (!strcmp(o->oname, *tralp)) {
342			if (traset[0] >= MAXTSET) {
343			error(WARNING, "too many modifiers in trace list");
344			hitlimit++;
345			return; /* should this be fatal? */
346			}
347			insertelem(traset, obj);
348			return;
349			}
350			}
351
352
353	greg	1.1	static
354			ourtrace(r) /* print ray values */
355			RAY *r;
356			{
357			register int (**tp)();
358
359			if (every_out[0] == NULL)
360	greg	2.15	return;
361	greg	2.16	if (r->ro == NULL) {
362			if (traincl == 1)
363			return;
364			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
365	greg	1.1	return;
366			tabin(r);
367			for (tp = every_out; *tp != NULL; tp++)
368			(**tp)(r);
369			putchar('\n');
370			}
371
372
373			static
374			tabin(r) /* tab in appropriate amount */
375			RAY *r;
376			{
377			register RAY *rp;
378
379			for (rp = r->parent; rp != NULL; rp = rp->parent)
380			putchar('\t');
381			}
382
383
384			static
385			oputo(r) /* print origin */
386			register RAY *r;
387			{
388			(*putreal)(r->rorg[0]);
389			(*putreal)(r->rorg[1]);
390			(*putreal)(r->rorg[2]);
391			}
392
393
394			static
395			oputd(r) /* print direction */
396			register RAY *r;
397			{
398			(*putreal)(r->rdir[0]);
399			(*putreal)(r->rdir[1]);
400			(*putreal)(r->rdir[2]);
401			}
402
403
404			static
405			oputv(r) /* print value */
406			register RAY *r;
407			{
408	greg	2.6	COLR cout;
409
410			if (outform == 'c') {
411			setcolr(cout, colval(r->rcol,RED),
412			colval(r->rcol,GRN),
413			colval(r->rcol,BLU));
414			fwrite((char *)cout, sizeof(cout), 1, stdout);
415			return;
416			}
417	greg	1.1	(*putreal)(colval(r->rcol,RED));
418			(*putreal)(colval(r->rcol,GRN));
419			(*putreal)(colval(r->rcol,BLU));
420			}
421
422
423			static
424	greg	2.5	oputl(r) /* print effective distance */
425	greg	1.1	register RAY *r;
426			{
427	greg	1.9	(*putreal)(r->rt);
428	greg	2.5	}
429
430
431			static
432			oputL(r) /* print single ray length */
433			register RAY *r;
434			{
435			(*putreal)(r->rot);
436	greg	1.1	}
437
438
439			static
440			oputp(r) /* print point */
441			register RAY *r;
442			{
443			if (r->rot < FHUGE) {
444			(*putreal)(r->rop[0]);
445			(*putreal)(r->rop[1]);
446			(*putreal)(r->rop[2]);
447			} else {
448			(*putreal)(0.0);
449			(*putreal)(0.0);
450			(*putreal)(0.0);
451			}
452			}
453
454
455			static
456	greg	2.9	oputN(r) /* print unperturbed normal */
457	greg	1.1	register RAY *r;
458			{
459			if (r->rot < FHUGE) {
460			(*putreal)(r->ron[0]);
461			(*putreal)(r->ron[1]);
462			(*putreal)(r->ron[2]);
463			} else {
464			(*putreal)(0.0);
465			(*putreal)(0.0);
466			(*putreal)(0.0);
467			}
468	greg	2.9	}
469
470
471			static
472			oputn(r) /* print perturbed normal */
473			RAY *r;
474			{
475			FVECT pnorm;
476
477			if (r->rot >= FHUGE) {
478			(*putreal)(0.0);
479			(*putreal)(0.0);
480			(*putreal)(0.0);
481			return;
482			}
483			raynormal(pnorm, r);
484			(*putreal)(pnorm[0]);
485			(*putreal)(pnorm[1]);
486			(*putreal)(pnorm[2]);
487	greg	1.1	}
488
489
490			static
491			oputs(r) /* print name */
492			register RAY *r;
493			{
494			if (r->ro != NULL)
495			fputs(r->ro->oname, stdout);
496			else
497			putchar('*');
498			putchar('\t');
499			}
500
501
502			static
503			oputw(r) /* print weight */
504			register RAY *r;
505			{
506			(*putreal)(r->rweight);
507			}
508
509
510			static
511			oputm(r) /* print modifier */
512			register RAY *r;
513			{
514			if (r->ro != NULL)
515			fputs(objptr(r->ro->omod)->oname, stdout);
516			else
517			putchar('*');
518			putchar('\t');
519			}
520
521
522			static
523			puta(v) /* print ascii value */
524			double v;
525			{
526			printf("%e\t", v);
527			}
528
529
530			static
531			putd(v) /* print binary double */
532			double v;
533			{
534	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
535	greg	1.1	}
536
537
538			static
539			putf(v) /* print binary float */
540			double v;
541			{
542			float f = v;
543
544	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
545	greg	1.1	}