src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 *  rtrace.c - program and variables for individual ray tracing.
 */

#include "copyright.h"

/*
 *  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  "otypes.h"

#include  "resolu.h"

CUBE  thescene;                         /* our scene */
OBJECT  nsceneobjs;                     /* number of objects in our scene */

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  lim_dist = 0;                      /* limit distance? */

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

int  do_irrad = 0;                      /* compute irradiance? */

void  (*trace)() = NULL;                /* trace call */

extern void  ambnotify(), tranotify();
void  (*addobjnotify[])() = {ambnotify, tranotify, NULL};
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 */
COLOR  salbedo = BLKCOLOR;              /* 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 */

char  *ambfile = NULL;                  /* ambient file name */
COLOR  ambval = BLKCOLOR;               /* ambient value */
int  ambvwt = 0;                        /* initial weight for 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 */


static RAY  thisray;                    /* for our convenience */

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

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

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

static void  (*putreal)();

void    bogusray(), rad(), irrad(), printvals();


void
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");
}


void
rtrace(fname)                           /* trace rays from file */
char  *fname;
{
        long  vcount = hresolu>1 ? hresolu*vresolu : vresolu;
        long  nextflush = hresolu;
        FILE  *fp;
        double  d;
        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) {

                d = normalize(direc);
                if (d == 0.0) {                         /* zero ==> flush */
                        bogusray();
                        if (--nextflush <= 0 || vcount <= 0) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                } else {
                        samplendx++;
                                                        /* compute and print */
                        if (imm_irrad)
                                irrad(orig, direc);
                        else
                                rad(orig, direc, lim_dist ? d : 0.0);
                                                        /* 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 void  (*trace)();
        register void (**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;
}


void
bogusray()                      /* print out empty record */
{
        thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
        thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        printvals(&thisray);
}


void
rad(org, dir, dmax)             /* compute and print ray value(s) */
FVECT  org, dir;
double  dmax;
{
        VCOPY(thisray.rorg, org);
        VCOPY(thisray.rdir, dir);
        thisray.rmax = dmax;
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        if (castonly) {
                if (!localhit(&thisray, &thescene))
                        if (thisray.ro == &Aftplane) {  /* clipped */
                                thisray.ro = NULL;
                                thisray.rot = FHUGE;
                        } else
                                sourcehit(&thisray);
        } else
                rayvalue(&thisray);
        printvals(&thisray);
}


void
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);
}


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

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


int
getvec(vec, fmt, fp)            /* get a vector from fp */
register FVECT  vec;
int  fmt;
FILE  *fp;
{
        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);
}


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

        if (obj == OVOID) {             /* starting over */
                traset[0] = 0;
                hitlimit = 0;
                return;
        }
        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 void
ourtrace(r)                             /* print ray values */
RAY  *r;
{
        register void  (**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 void
tabin(r)                                /* tab in appropriate amount */
RAY  *r;
{
        register RAY  *rp;

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


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


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


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


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


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


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


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


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


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


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

        fwrite((char *)&f, sizeof(f), 1, stdout);
}
Revision:	2.28
Committed:	Tue Feb 25 02:47:23 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Changes since 2.27:	+1 -56 lines
Log Message:	Replaced inline copyright notice with #include "copyright.h"
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.27	static const char RCSid[] = "$Id$";
3	greg	1.1	#endif
4			/*
5			* rtrace.c - program and variables for individual ray tracing.
6	greg	2.27	*/
7
8	greg	2.28	#include "copyright.h"
9	greg	1.1
10			/*
11			* Input is in the form:
12			*
13			* xorg yorg zorg xdir ydir zdir
14			*
15			* The direction need not be normalized. Output is flexible.
16	greg	1.7	* If the direction vector is (0,0,0), then the output is flushed.
17	greg	1.1	* All values default to ascii representation of real
18			* numbers. Binary representations can be selected
19			* with '-ff' for float or '-fd' for double. By default,
20	greg	1.13	* radiance is computed. The '-i' or '-I' options indicate that
21	greg	1.1	* irradiance values are desired.
22			*/
23
24			#include "ray.h"
25
26			#include "otypes.h"
27
28	greg	2.6	#include "resolu.h"
29
30	greg	2.27	CUBE thescene; /* our scene */
31			OBJECT nsceneobjs; /* number of objects in our scene */
32
33	greg	1.14	int dimlist[MAXDIM]; /* sampling dimensions */
34			int ndims = 0; /* number of sampling dimensions */
35			int samplendx = 0; /* index for this sample */
36
37	greg	1.13	int imm_irrad = 0; /* compute immediate irradiance? */
38	gregl	2.25	int lim_dist = 0; /* limit distance? */
39	greg	1.13
40	greg	1.1	int inform = 'a'; /* input format */
41			int outform = 'a'; /* output format */
42			char outvals = "v"; / output specification */
43
44	greg	2.27	int do_irrad = 0; /* compute irradiance? */
45
46			void (trace)() = NULL; / trace call */
47
48			extern void ambnotify(), tranotify();
49			void (*addobjnotify[])() = {ambnotify, tranotify, NULL};
50	greg	2.15	char tralist[128]; / list of modifers to trace (or no) */
51			int traincl = -1; /* include == 1, exclude == 0 */
52			#define MAXTSET 511 /* maximum number in trace set */
53			OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
54
55	greg	1.1	int hresolu = 0; /* horizontal (scan) size */
56			int vresolu = 0; /* vertical resolution */
57
58			double dstrsrc = 0.0; /* square source distribution */
59	greg	1.4	double shadthresh = .05; /* shadow threshold */
60	greg	1.5	double shadcert = .5; /* shadow certainty */
61	greg	2.19	int directrelay = 2; /* number of source relays */
62	greg	1.17	int vspretest = 512; /* virtual source pretest density */
63	greg	2.10	int directvis = 1; /* sources visible? */
64	greg	2.19	double srcsizerat = .2; /* maximum ratio source size/dist. */
65	greg	2.20
66			COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
67	greg	2.22	COLOR salbedo = BLKCOLOR; /* global scattering albedo */
68	greg	2.20	double seccg = 0.; /* global scattering eccentricity */
69			double ssampdist = 0.; /* scatter sampling distance */
70	greg	1.1
71	greg	2.4	double specthresh = .15; /* specular sampling threshold */
72	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
73
74	greg	2.18	int backvis = 1; /* back face visibility */
75
76	greg	1.1	int maxdepth = 6; /* maximum recursion depth */
77			double minweight = 4e-3; /* minimum ray weight */
78
79	greg	2.27	char ambfile = NULL; / ambient file name */
80	greg	1.1	COLOR ambval = BLKCOLOR; /* ambient value */
81	greg	2.21	int ambvwt = 0; /* initial weight for ambient value */
82	greg	1.1	double ambacc = 0.2; /* ambient accuracy */
83	greg	2.19	int ambres = 128; /* ambient resolution */
84			int ambdiv = 512; /* ambient divisions */
85	greg	1.1	int ambssamp = 0; /* ambient super-samples */
86			int ambounce = 0; /* ambient bounces */
87			char amblist[128]; / ambient include/exclude list */
88			int ambincl = -1; /* include == 1, exclude == 0 */
89
90	gregl	2.25
91	greg	1.1	static RAY thisray; /* for our convenience */
92
93	greg	2.27	static void oputo(), oputd(), oputv(), oputl(), oputL(),
94	greg	2.9	oputp(), oputn(), oputN(), oputs(), oputw(), oputm();
95	greg	1.1
96	greg	2.27	static void ourtrace(), tabin();
97			static void (ray_out[16])(), (every_out[16])();
98	greg	2.14	static int castonly = 0;
99	greg	1.1
100	greg	2.27	static void puta(), putf(), putd();
101
102			static void (*putreal)();
103	greg	1.1
104	greg	2.27	void bogusray(), rad(), irrad(), printvals();
105	greg	1.1
106
107	greg	2.27	void
108	greg	1.1	quit(code) /* quit program */
109			int code;
110			{
111	greg	2.11	#ifndef NIX
112			headclean(); /* delete header file */
113			pfclean(); /* clean up persist files */
114			#endif
115	greg	1.1	exit(code);
116			}
117
118
119	greg	2.6	char *
120			formstr(f) /* return format identifier */
121			int f;
122			{
123			switch (f) {
124			case 'a': return("ascii");
125			case 'f': return("float");
126			case 'd': return("double");
127			case 'c': return(COLRFMT);
128			}
129			return("unknown");
130			}
131
132
133	greg	2.27	void
134	greg	1.1	rtrace(fname) /* trace rays from file */
135			char *fname;
136			{
137			long vcount = hresolu>1 ? hresolu*vresolu : vresolu;
138			long nextflush = hresolu;
139			FILE *fp;
140	gregl	2.25	double d;
141	greg	1.2	FVECT orig, direc;
142	greg	1.1	/* set up input */
143			if (fname == NULL)
144			fp = stdin;
145			else if ((fp = fopen(fname, "r")) == NULL) {
146			sprintf(errmsg, "cannot open input file \"%s\"", fname);
147			error(SYSTEM, errmsg);
148			}
149	greg	2.8	#ifdef MSDOS
150			if (inform != 'a')
151			setmode(fileno(fp), O_BINARY);
152			#endif
153	greg	1.1	/* set up output */
154	greg	2.16	setoutput(outvals);
155	greg	1.1	switch (outform) {
156			case 'a': putreal = puta; break;
157			case 'f': putreal = putf; break;
158			case 'd': putreal = putd; break;
159	greg	2.6	case 'c':
160			if (strcmp(outvals, "v"))
161			error(USER, "color format with value output only");
162			break;
163			default:
164			error(CONSISTENCY, "botched output format");
165	greg	1.1	}
166	greg	2.12	if (hresolu > 0) {
167			if (vresolu > 0)
168			fprtresolu(hresolu, vresolu, stdout);
169			fflush(stdout);
170			}
171	greg	1.1	/* process file */
172			while (getvec(orig, inform, fp) == 0 &&
173			getvec(direc, inform, fp) == 0) {
174
175	gregl	2.25	d = normalize(direc);
176			if (d == 0.0) { /* zero ==> flush */
177	gregl	2.24	bogusray();
178	gregl	2.26	if (--nextflush <= 0 \|\| vcount <= 0) {
179	gregl	2.24	fflush(stdout);
180			nextflush = hresolu;
181			}
182			} else {
183			samplendx++;
184	greg	1.1	/* compute and print */
185	gregl	2.24	if (imm_irrad)
186			irrad(orig, direc);
187			else
188	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
189	greg	1.7	/* flush if time */
190	gregl	2.24	if (--nextflush == 0) {
191			fflush(stdout);
192			nextflush = hresolu;
193			}
194	greg	1.1	}
195			if (ferror(stdout))
196			error(SYSTEM, "write error");
197			if (--vcount == 0) /* check for end */
198			break;
199			}
200	greg	2.12	fflush(stdout);
201	greg	1.1	if (vcount > 0)
202			error(USER, "read error");
203	greg	2.12	if (fname != NULL)
204			fclose(fp);
205	greg	1.1	}
206
207
208			setoutput(vs) /* set up output tables */
209			register char *vs;
210			{
211	greg	2.27	extern void (*trace)();
212			register void (**table)() = ray_out;
213	greg	1.1
214	greg	1.11	castonly = 1;
215	greg	1.1	while (*vs)
216			switch (*vs++) {
217			case 't': /* trace */
218			*table = NULL;
219			table = every_out;
220			trace = ourtrace;
221	greg	1.11	castonly = 0;
222	greg	1.1	break;
223			case 'o': /* origin */
224			*table++ = oputo;
225			break;
226			case 'd': /* direction */
227			*table++ = oputd;
228			break;
229			case 'v': /* value */
230			*table++ = oputv;
231	greg	1.11	castonly = 0;
232	greg	1.1	break;
233	greg	2.5	case 'l': /* effective distance */
234	greg	1.1	*table++ = oputl;
235	greg	1.11	castonly = 0;
236	greg	1.1	break;
237	greg	2.5	case 'L': /* single ray length */
238			*table++ = oputL;
239			break;
240	greg	1.1	case 'p': /* point */
241			*table++ = oputp;
242			break;
243	greg	2.9	case 'n': /* perturbed normal */
244	greg	1.1	*table++ = oputn;
245	greg	2.9	castonly = 0;
246	greg	1.1	break;
247	greg	2.9	case 'N': /* unperturbed normal */
248			*table++ = oputN;
249			break;
250	greg	1.1	case 's': /* surface */
251			*table++ = oputs;
252			break;
253			case 'w': /* weight */
254			*table++ = oputw;
255			break;
256			case 'm': /* modifier */
257			*table++ = oputm;
258			break;
259			}
260			*table = NULL;
261	gregl	2.24	}
262
263
264	greg	2.27	void
265	gregl	2.24	bogusray() /* print out empty record */
266			{
267			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
268			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
269			rayorigin(&thisray, NULL, PRIMARY, 1.0);
270			printvals(&thisray);
271	greg	1.1	}
272
273
274	greg	2.27	void
275	gregl	2.25	rad(org, dir, dmax) /* compute and print ray value(s) */
276	greg	1.1	FVECT org, dir;
277	gregl	2.25	double dmax;
278	greg	1.1	{
279			VCOPY(thisray.rorg, org);
280			VCOPY(thisray.rdir, dir);
281	gregl	2.25	thisray.rmax = dmax;
282	greg	1.1	rayorigin(&thisray, NULL, PRIMARY, 1.0);
283	gregl	2.25	if (castonly) {
284			if (!localhit(&thisray, &thescene))
285			if (thisray.ro == &Aftplane) { /* clipped */
286			thisray.ro = NULL;
287			thisray.rot = FHUGE;
288			} else
289			sourcehit(&thisray);
290			} else
291	greg	1.11	rayvalue(&thisray);
292	greg	2.16	printvals(&thisray);
293	greg	1.1	}
294
295
296	greg	2.27	void
297	greg	1.13	irrad(org, dir) /* compute immediate irradiance value */
298	greg	1.1	FVECT org, dir;
299			{
300			register int i;
301
302			for (i = 0; i < 3; i++) {
303			thisray.rorg[i] = org[i] + dir[i];
304			thisray.rdir[i] = -dir[i];
305			}
306			rayorigin(&thisray, NULL, PRIMARY, 1.0);
307			/* pretend we hit surface */
308	greg	2.16	thisray.rot = 1.0-1e-4;
309	greg	1.1	thisray.rod = 1.0;
310			VCOPY(thisray.ron, dir);
311			for (i = 0; i < 3; i++) /* fudge factor */
312			thisray.rop[i] = org[i] + 1e-4*dir[i];
313			/* compute and print */
314			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
315	greg	2.16	printvals(&thisray);
316			}
317
318
319	greg	2.27	void
320	greg	2.16	printvals(r) /* print requested ray values */
321			RAY *r;
322			{
323	greg	2.27	register void (**tp)();
324	greg	2.16
325			if (ray_out[0] == NULL)
326			return;
327			for (tp = ray_out; *tp != NULL; tp++)
328			(**tp)(r);
329	greg	1.1	if (outform == 'a')
330			putchar('\n');
331			}
332
333
334	greg	2.27	int
335	greg	1.1	getvec(vec, fmt, fp) /* get a vector from fp */
336			register FVECT vec;
337			int fmt;
338			FILE *fp;
339			{
340			static float vf[3];
341	greg	2.5	static double vd[3];
342	greg	1.19	char buf[32];
343			register int i;
344	greg	1.1
345			switch (fmt) {
346			case 'a': /* ascii */
347	greg	1.19	for (i = 0; i < 3; i++) {
348			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
349			!isflt(buf))
350			return(-1);
351			vec[i] = atof(buf);
352			}
353	greg	1.1	break;
354			case 'f': /* binary float */
355	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
356	greg	1.1	return(-1);
357			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
358			break;
359			case 'd': /* binary double */
360	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
361	greg	1.1	return(-1);
362	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
363	greg	1.1	break;
364	greg	2.6	default:
365			error(CONSISTENCY, "botched input format");
366	greg	1.1	}
367			return(0);
368			}
369
370
371	greg	2.27	void
372	greg	2.15	tranotify(obj) /* record new modifier */
373			OBJECT obj;
374			{
375			static int hitlimit = 0;
376			register OBJREC *o = objptr(obj);
377			register char **tralp;
378
379	greg	2.27	if (obj == OVOID) { /* starting over */
380			traset[0] = 0;
381			hitlimit = 0;
382			return;
383			}
384	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
385			return;
386			for (tralp = tralist; *tralp != NULL; tralp++)
387			if (!strcmp(o->oname, *tralp)) {
388			if (traset[0] >= MAXTSET) {
389			error(WARNING, "too many modifiers in trace list");
390			hitlimit++;
391			return; /* should this be fatal? */
392			}
393			insertelem(traset, obj);
394			return;
395			}
396			}
397
398
399	greg	2.27	static void
400	greg	1.1	ourtrace(r) /* print ray values */
401			RAY *r;
402			{
403	greg	2.27	register void (**tp)();
404	greg	1.1
405			if (every_out[0] == NULL)
406	greg	2.15	return;
407	greg	2.16	if (r->ro == NULL) {
408			if (traincl == 1)
409			return;
410			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
411	greg	1.1	return;
412			tabin(r);
413			for (tp = every_out; *tp != NULL; tp++)
414			(**tp)(r);
415			putchar('\n');
416			}
417
418
419	greg	2.27	static void
420	greg	1.1	tabin(r) /* tab in appropriate amount */
421			RAY *r;
422			{
423			register RAY *rp;
424
425			for (rp = r->parent; rp != NULL; rp = rp->parent)
426			putchar('\t');
427			}
428
429
430	greg	2.27	static void
431	greg	1.1	oputo(r) /* print origin */
432			register RAY *r;
433			{
434			(*putreal)(r->rorg[0]);
435			(*putreal)(r->rorg[1]);
436			(*putreal)(r->rorg[2]);
437			}
438
439
440	greg	2.27	static void
441	greg	1.1	oputd(r) /* print direction */
442			register RAY *r;
443			{
444			(*putreal)(r->rdir[0]);
445			(*putreal)(r->rdir[1]);
446			(*putreal)(r->rdir[2]);
447			}
448
449
450	greg	2.27	static void
451	greg	1.1	oputv(r) /* print value */
452			register RAY *r;
453			{
454	greg	2.6	COLR cout;
455
456			if (outform == 'c') {
457			setcolr(cout, colval(r->rcol,RED),
458			colval(r->rcol,GRN),
459			colval(r->rcol,BLU));
460			fwrite((char *)cout, sizeof(cout), 1, stdout);
461			return;
462			}
463	greg	1.1	(*putreal)(colval(r->rcol,RED));
464			(*putreal)(colval(r->rcol,GRN));
465			(*putreal)(colval(r->rcol,BLU));
466			}
467
468
469	greg	2.27	static void
470	greg	2.5	oputl(r) /* print effective distance */
471	greg	1.1	register RAY *r;
472			{
473	greg	1.9	(*putreal)(r->rt);
474	greg	2.5	}
475
476
477	greg	2.27	static void
478	greg	2.5	oputL(r) /* print single ray length */
479			register RAY *r;
480			{
481			(*putreal)(r->rot);
482	greg	1.1	}
483
484
485	greg	2.27	static void
486	greg	1.1	oputp(r) /* print point */
487			register RAY *r;
488			{
489			if (r->rot < FHUGE) {
490			(*putreal)(r->rop[0]);
491			(*putreal)(r->rop[1]);
492			(*putreal)(r->rop[2]);
493			} else {
494			(*putreal)(0.0);
495			(*putreal)(0.0);
496			(*putreal)(0.0);
497			}
498			}
499
500
501	greg	2.27	static void
502	greg	2.9	oputN(r) /* print unperturbed normal */
503	greg	1.1	register RAY *r;
504			{
505			if (r->rot < FHUGE) {
506			(*putreal)(r->ron[0]);
507			(*putreal)(r->ron[1]);
508			(*putreal)(r->ron[2]);
509			} else {
510			(*putreal)(0.0);
511			(*putreal)(0.0);
512			(*putreal)(0.0);
513			}
514	greg	2.9	}
515
516
517	greg	2.27	static void
518	greg	2.9	oputn(r) /* print perturbed normal */
519			RAY *r;
520			{
521			FVECT pnorm;
522
523			if (r->rot >= FHUGE) {
524			(*putreal)(0.0);
525			(*putreal)(0.0);
526			(*putreal)(0.0);
527			return;
528			}
529			raynormal(pnorm, r);
530			(*putreal)(pnorm[0]);
531			(*putreal)(pnorm[1]);
532			(*putreal)(pnorm[2]);
533	greg	1.1	}
534
535
536	greg	2.27	static void
537	greg	1.1	oputs(r) /* print name */
538			register RAY *r;
539			{
540			if (r->ro != NULL)
541			fputs(r->ro->oname, stdout);
542			else
543			putchar('*');
544			putchar('\t');
545			}
546
547
548	greg	2.27	static void
549	greg	1.1	oputw(r) /* print weight */
550			register RAY *r;
551			{
552			(*putreal)(r->rweight);
553			}
554
555
556	greg	2.27	static void
557	greg	1.1	oputm(r) /* print modifier */
558			register RAY *r;
559			{
560			if (r->ro != NULL)
561	greg	2.23	if (r->ro->omod != OVOID)
562			fputs(objptr(r->ro->omod)->oname, stdout);
563			else
564			fputs(VOIDID, stdout);
565	greg	1.1	else
566			putchar('*');
567			putchar('\t');
568			}
569
570
571	greg	2.27	static void
572	greg	1.1	puta(v) /* print ascii value */
573			double v;
574			{
575			printf("%e\t", v);
576			}
577
578
579	greg	2.27	static void
580	greg	1.1	putd(v) /* print binary double */
581			double v;
582			{
583	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
584	greg	1.1	}
585
586
587	greg	2.27	static void
588	greg	1.1	putf(v) /* print binary float */
589			double v;
590			{
591			float f = v;
592
593	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
594	greg	1.1	}