src/rt/rtrace.c

/* Copyright (c) 1995 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. */

COLOR  cextinction = BLKCOLOR;          /* global extinction coefficient */
double  salbedo = 0.;                   /* global scattering albedo */
double  seccg = 0.;                     /* global scattering eccentricity */
double  ssampdist = 0.;                 /* scatter sampling distance */

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:	2.20
Committed:	Fri Dec 8 18:49:12 1995 UTC (28 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.19:	+6 -1 lines
Log Message:	added M_MIST (mist) material and global participating medium
#	User	Rev	Content
1	greg	2.20	/* Copyright (c) 1995 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	2.20
61			COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
62			double salbedo = 0.; /* global scattering albedo */
63			double seccg = 0.; /* global scattering eccentricity */
64			double ssampdist = 0.; /* scatter sampling distance */
65	greg	1.1
66	greg	2.4	double specthresh = .15; /* specular sampling threshold */
67	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
68
69	greg	2.18	int backvis = 1; /* back face visibility */
70
71	greg	1.1	int maxdepth = 6; /* maximum recursion depth */
72			double minweight = 4e-3; /* minimum ray weight */
73
74			COLOR ambval = BLKCOLOR; /* ambient value */
75			double ambacc = 0.2; /* ambient accuracy */
76	greg	2.19	int ambres = 128; /* ambient resolution */
77			int ambdiv = 512; /* ambient divisions */
78	greg	1.1	int ambssamp = 0; /* ambient super-samples */
79			int ambounce = 0; /* ambient bounces */
80			char amblist[128]; / ambient include/exclude list */
81			int ambincl = -1; /* include == 1, exclude == 0 */
82
83	greg	1.13	extern OBJREC Lamb; /* a Lambertian surface */
84
85	greg	1.1	static RAY thisray; /* for our convenience */
86
87	greg	2.5	static int oputo(), oputd(), oputv(), oputl(), oputL(),
88	greg	2.9	oputp(), oputn(), oputN(), oputs(), oputw(), oputm();
89	greg	1.1
90	greg	2.13	static int ourtrace(), tabin();
91	greg	2.14	static int (ray_out[16])(), (every_out[16])();
92			static int castonly = 0;
93	greg	1.1
94	greg	1.10	static int puta(), putf(), putd();
95	greg	1.1
96			static int (*putreal)();
97
98
99			quit(code) /* quit program */
100			int code;
101			{
102	greg	2.11	#ifndef NIX
103			headclean(); /* delete header file */
104			pfclean(); /* clean up persist files */
105			#endif
106	greg	1.1	exit(code);
107			}
108
109
110	greg	2.6	char *
111			formstr(f) /* return format identifier */
112			int f;
113			{
114			switch (f) {
115			case 'a': return("ascii");
116			case 'f': return("float");
117			case 'd': return("double");
118			case 'c': return(COLRFMT);
119			}
120			return("unknown");
121			}
122
123
124	greg	1.1	rtrace(fname) /* trace rays from file */
125			char *fname;
126			{
127			long vcount = hresolu>1 ? hresolu*vresolu : vresolu;
128			long nextflush = hresolu;
129			FILE *fp;
130	greg	1.2	FVECT orig, direc;
131	greg	1.1	/* set up input */
132			if (fname == NULL)
133			fp = stdin;
134			else if ((fp = fopen(fname, "r")) == NULL) {
135			sprintf(errmsg, "cannot open input file \"%s\"", fname);
136			error(SYSTEM, errmsg);
137			}
138	greg	2.8	#ifdef MSDOS
139			if (inform != 'a')
140			setmode(fileno(fp), O_BINARY);
141			#endif
142	greg	1.1	/* set up output */
143	greg	2.16	setoutput(outvals);
144	greg	1.1	switch (outform) {
145			case 'a': putreal = puta; break;
146			case 'f': putreal = putf; break;
147			case 'd': putreal = putd; break;
148	greg	2.6	case 'c':
149			if (strcmp(outvals, "v"))
150			error(USER, "color format with value output only");
151			break;
152			default:
153			error(CONSISTENCY, "botched output format");
154	greg	1.1	}
155	greg	2.12	if (hresolu > 0) {
156			if (vresolu > 0)
157			fprtresolu(hresolu, vresolu, stdout);
158			fflush(stdout);
159			}
160	greg	1.1	/* process file */
161			while (getvec(orig, inform, fp) == 0 &&
162			getvec(direc, inform, fp) == 0) {
163
164	greg	1.7	if (normalize(direc) == 0.0) { /* zero ==> flush */
165			fflush(stdout);
166			continue;
167			}
168	greg	1.14	samplendx++;
169	greg	1.1	/* compute and print */
170	greg	1.13	if (imm_irrad)
171	greg	1.1	irrad(orig, direc);
172			else
173	greg	2.16	rad(orig, direc);
174	greg	1.7	/* flush if time */
175	greg	1.1	if (--nextflush == 0) {
176			fflush(stdout);
177			nextflush = hresolu;
178			}
179			if (ferror(stdout))
180			error(SYSTEM, "write error");
181			if (--vcount == 0) /* check for end */
182			break;
183			}
184	greg	2.12	fflush(stdout);
185	greg	1.1	if (vcount > 0)
186			error(USER, "read error");
187	greg	2.12	if (fname != NULL)
188			fclose(fp);
189	greg	1.1	}
190
191
192			setoutput(vs) /* set up output tables */
193			register char *vs;
194			{
195	greg	2.13	extern int (*trace)();
196	greg	1.1	register int (**table)() = ray_out;
197
198	greg	1.11	castonly = 1;
199	greg	1.1	while (*vs)
200			switch (*vs++) {
201			case 't': /* trace */
202			*table = NULL;
203			table = every_out;
204			trace = ourtrace;
205	greg	1.11	castonly = 0;
206	greg	1.1	break;
207			case 'o': /* origin */
208			*table++ = oputo;
209			break;
210			case 'd': /* direction */
211			*table++ = oputd;
212			break;
213			case 'v': /* value */
214			*table++ = oputv;
215	greg	1.11	castonly = 0;
216	greg	1.1	break;
217	greg	2.5	case 'l': /* effective distance */
218	greg	1.1	*table++ = oputl;
219	greg	1.11	castonly = 0;
220	greg	1.1	break;
221	greg	2.5	case 'L': /* single ray length */
222			*table++ = oputL;
223			break;
224	greg	1.1	case 'p': /* point */
225			*table++ = oputp;
226			break;
227	greg	2.9	case 'n': /* perturbed normal */
228	greg	1.1	*table++ = oputn;
229	greg	2.9	castonly = 0;
230	greg	1.1	break;
231	greg	2.9	case 'N': /* unperturbed normal */
232			*table++ = oputN;
233			break;
234	greg	1.1	case 's': /* surface */
235			*table++ = oputs;
236			break;
237			case 'w': /* weight */
238			*table++ = oputw;
239			break;
240			case 'm': /* modifier */
241			*table++ = oputm;
242			break;
243			}
244			*table = NULL;
245			}
246
247
248	greg	2.16	rad(org, dir) /* compute and print ray value(s) */
249	greg	1.1	FVECT org, dir;
250			{
251			VCOPY(thisray.rorg, org);
252			VCOPY(thisray.rdir, dir);
253	greg	2.17	thisray.rmax = 0.0;
254	greg	1.1	rayorigin(&thisray, NULL, PRIMARY, 1.0);
255	greg	1.11	if (castonly)
256			localhit(&thisray, &thescene) \|\| sourcehit(&thisray);
257			else
258			rayvalue(&thisray);
259	greg	2.16	printvals(&thisray);
260	greg	1.1	}
261
262
263	greg	1.13	irrad(org, dir) /* compute immediate irradiance value */
264	greg	1.1	FVECT org, dir;
265			{
266			register int i;
267
268			for (i = 0; i < 3; i++) {
269			thisray.rorg[i] = org[i] + dir[i];
270			thisray.rdir[i] = -dir[i];
271			}
272			rayorigin(&thisray, NULL, PRIMARY, 1.0);
273			/* pretend we hit surface */
274	greg	2.16	thisray.rot = 1.0-1e-4;
275	greg	1.1	thisray.rod = 1.0;
276			VCOPY(thisray.ron, dir);
277			for (i = 0; i < 3; i++) /* fudge factor */
278			thisray.rop[i] = org[i] + 1e-4*dir[i];
279			/* compute and print */
280			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
281	greg	2.16	printvals(&thisray);
282			}
283
284
285			printvals(r) /* print requested ray values */
286			RAY *r;
287			{
288			register int (**tp)();
289
290			if (ray_out[0] == NULL)
291			return;
292			for (tp = ray_out; *tp != NULL; tp++)
293			(**tp)(r);
294	greg	1.1	if (outform == 'a')
295			putchar('\n');
296			}
297
298
299			getvec(vec, fmt, fp) /* get a vector from fp */
300			register FVECT vec;
301			int fmt;
302			FILE *fp;
303			{
304	greg	1.19	extern char *fgetword();
305	greg	1.1	static float vf[3];
306	greg	2.5	static double vd[3];
307	greg	1.19	char buf[32];
308			register int i;
309	greg	1.1
310			switch (fmt) {
311			case 'a': /* ascii */
312	greg	1.19	for (i = 0; i < 3; i++) {
313			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
314			!isflt(buf))
315			return(-1);
316			vec[i] = atof(buf);
317			}
318	greg	1.1	break;
319			case 'f': /* binary float */
320	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
321	greg	1.1	return(-1);
322			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
323			break;
324			case 'd': /* binary double */
325	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
326	greg	1.1	return(-1);
327	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
328	greg	1.1	break;
329	greg	2.6	default:
330			error(CONSISTENCY, "botched input format");
331	greg	1.1	}
332			return(0);
333			}
334
335
336	greg	2.15	tranotify(obj) /* record new modifier */
337			OBJECT obj;
338			{
339			static int hitlimit = 0;
340			register OBJREC *o = objptr(obj);
341			register char **tralp;
342
343			if (hitlimit \|\| !ismodifier(o->otype))
344			return;
345			for (tralp = tralist; *tralp != NULL; tralp++)
346			if (!strcmp(o->oname, *tralp)) {
347			if (traset[0] >= MAXTSET) {
348			error(WARNING, "too many modifiers in trace list");
349			hitlimit++;
350			return; /* should this be fatal? */
351			}
352			insertelem(traset, obj);
353			return;
354			}
355			}
356
357
358	greg	1.1	static
359			ourtrace(r) /* print ray values */
360			RAY *r;
361			{
362			register int (**tp)();
363
364			if (every_out[0] == NULL)
365	greg	2.15	return;
366	greg	2.16	if (r->ro == NULL) {
367			if (traincl == 1)
368			return;
369			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
370	greg	1.1	return;
371			tabin(r);
372			for (tp = every_out; *tp != NULL; tp++)
373			(**tp)(r);
374			putchar('\n');
375			}
376
377
378			static
379			tabin(r) /* tab in appropriate amount */
380			RAY *r;
381			{
382			register RAY *rp;
383
384			for (rp = r->parent; rp != NULL; rp = rp->parent)
385			putchar('\t');
386			}
387
388
389			static
390			oputo(r) /* print origin */
391			register RAY *r;
392			{
393			(*putreal)(r->rorg[0]);
394			(*putreal)(r->rorg[1]);
395			(*putreal)(r->rorg[2]);
396			}
397
398
399			static
400			oputd(r) /* print direction */
401			register RAY *r;
402			{
403			(*putreal)(r->rdir[0]);
404			(*putreal)(r->rdir[1]);
405			(*putreal)(r->rdir[2]);
406			}
407
408
409			static
410			oputv(r) /* print value */
411			register RAY *r;
412			{
413	greg	2.6	COLR cout;
414
415			if (outform == 'c') {
416			setcolr(cout, colval(r->rcol,RED),
417			colval(r->rcol,GRN),
418			colval(r->rcol,BLU));
419			fwrite((char *)cout, sizeof(cout), 1, stdout);
420			return;
421			}
422	greg	1.1	(*putreal)(colval(r->rcol,RED));
423			(*putreal)(colval(r->rcol,GRN));
424			(*putreal)(colval(r->rcol,BLU));
425			}
426
427
428			static
429	greg	2.5	oputl(r) /* print effective distance */
430	greg	1.1	register RAY *r;
431			{
432	greg	1.9	(*putreal)(r->rt);
433	greg	2.5	}
434
435
436			static
437			oputL(r) /* print single ray length */
438			register RAY *r;
439			{
440			(*putreal)(r->rot);
441	greg	1.1	}
442
443
444			static
445			oputp(r) /* print point */
446			register RAY *r;
447			{
448			if (r->rot < FHUGE) {
449			(*putreal)(r->rop[0]);
450			(*putreal)(r->rop[1]);
451			(*putreal)(r->rop[2]);
452			} else {
453			(*putreal)(0.0);
454			(*putreal)(0.0);
455			(*putreal)(0.0);
456			}
457			}
458
459
460			static
461	greg	2.9	oputN(r) /* print unperturbed normal */
462	greg	1.1	register RAY *r;
463			{
464			if (r->rot < FHUGE) {
465			(*putreal)(r->ron[0]);
466			(*putreal)(r->ron[1]);
467			(*putreal)(r->ron[2]);
468			} else {
469			(*putreal)(0.0);
470			(*putreal)(0.0);
471			(*putreal)(0.0);
472			}
473	greg	2.9	}
474
475
476			static
477			oputn(r) /* print perturbed normal */
478			RAY *r;
479			{
480			FVECT pnorm;
481
482			if (r->rot >= FHUGE) {
483			(*putreal)(0.0);
484			(*putreal)(0.0);
485			(*putreal)(0.0);
486			return;
487			}
488			raynormal(pnorm, r);
489			(*putreal)(pnorm[0]);
490			(*putreal)(pnorm[1]);
491			(*putreal)(pnorm[2]);
492	greg	1.1	}
493
494
495			static
496			oputs(r) /* print name */
497			register RAY *r;
498			{
499			if (r->ro != NULL)
500			fputs(r->ro->oname, stdout);
501			else
502			putchar('*');
503			putchar('\t');
504			}
505
506
507			static
508			oputw(r) /* print weight */
509			register RAY *r;
510			{
511			(*putreal)(r->rweight);
512			}
513
514
515			static
516			oputm(r) /* print modifier */
517			register RAY *r;
518			{
519			if (r->ro != NULL)
520			fputs(objptr(r->ro->omod)->oname, stdout);
521			else
522			putchar('*');
523			putchar('\t');
524			}
525
526
527			static
528			puta(v) /* print ascii value */
529			double v;
530			{
531			printf("%e\t", v);
532			}
533
534
535			static
536			putd(v) /* print binary double */
537			double v;
538			{
539	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
540	greg	1.1	}
541
542
543			static
544			putf(v) /* print binary float */
545			double v;
546			{
547			float f = v;
548
549	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
550	greg	1.1	}