src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: rtrace.c,v 2.30 2003/06/05 19:29:34 schorsch Exp $";
#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  "platform.h"
#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(), oputc(),
                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  NON_POSIX /* XXX we don't clean up elsewhere? */
        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 _WIN32
        if (inform != 'a')
                SET_FILE_BINARY(fp);
#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 'c':                               /* local coordinates */
                        *table++ = oputc;
                        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 */
RAY  *r;
{
        (*putreal)(r->rorg[0]);
        (*putreal)(r->rorg[1]);
        (*putreal)(r->rorg[2]);
}


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


static void
oputv(r)                                /* print value */
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 */
RAY  *r;
{
        (*putreal)(r->rt);
}


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


static void
oputc(r)                                /* print local coordinates */
RAY  *r;
{
        (*putreal)(r->uv[0]);
        (*putreal)(r->uv[1]);
}


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


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


static void
oputm(r)                                /* print modifier */
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:	2.31
Committed:	Mon Jun 30 14:59:12 2003 UTC (20 years, 10 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.30:	+2 -2 lines
Log Message:	Replaced most outdated BSD function calls with their posix equivalents, and cleaned up a few other platform dependencies.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.31	static const char RCSid[] = "$Id: rtrace.c,v 2.30 2003/06/05 19:29:34 schorsch Exp $";
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	schorsch	2.30	#include "platform.h"
25	greg	1.1	#include "ray.h"
26			#include "otypes.h"
27	greg	2.6	#include "resolu.h"
28
29	greg	2.27	CUBE thescene; /* our scene */
30			OBJECT nsceneobjs; /* number of objects in our scene */
31
32	greg	1.14	int dimlist[MAXDIM]; /* sampling dimensions */
33			int ndims = 0; /* number of sampling dimensions */
34			int samplendx = 0; /* index for this sample */
35
36	greg	1.13	int imm_irrad = 0; /* compute immediate irradiance? */
37	gregl	2.25	int lim_dist = 0; /* limit distance? */
38	greg	1.13
39	greg	1.1	int inform = 'a'; /* input format */
40			int outform = 'a'; /* output format */
41			char outvals = "v"; / output specification */
42
43	greg	2.27	int do_irrad = 0; /* compute irradiance? */
44
45			void (trace)() = NULL; / trace call */
46
47			extern void ambnotify(), tranotify();
48			void (*addobjnotify[])() = {ambnotify, tranotify, NULL};
49	greg	2.15	char tralist[128]; / list of modifers to trace (or no) */
50			int traincl = -1; /* include == 1, exclude == 0 */
51			#define MAXTSET 511 /* maximum number in trace set */
52			OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
53
54	greg	1.1	int hresolu = 0; /* horizontal (scan) size */
55			int vresolu = 0; /* vertical resolution */
56
57			double dstrsrc = 0.0; /* square source distribution */
58	greg	1.4	double shadthresh = .05; /* shadow threshold */
59	greg	1.5	double shadcert = .5; /* shadow certainty */
60	greg	2.19	int directrelay = 2; /* number of source relays */
61	greg	1.17	int vspretest = 512; /* virtual source pretest density */
62	greg	2.10	int directvis = 1; /* sources visible? */
63	greg	2.19	double srcsizerat = .2; /* maximum ratio source size/dist. */
64	greg	2.20
65			COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
66	greg	2.22	COLOR salbedo = BLKCOLOR; /* global scattering albedo */
67	greg	2.20	double seccg = 0.; /* global scattering eccentricity */
68			double ssampdist = 0.; /* scatter sampling distance */
69	greg	1.1
70	greg	2.4	double specthresh = .15; /* specular sampling threshold */
71	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
72
73	greg	2.18	int backvis = 1; /* back face visibility */
74
75	greg	1.1	int maxdepth = 6; /* maximum recursion depth */
76			double minweight = 4e-3; /* minimum ray weight */
77
78	greg	2.27	char ambfile = NULL; / ambient file name */
79	greg	1.1	COLOR ambval = BLKCOLOR; /* ambient value */
80	greg	2.21	int ambvwt = 0; /* initial weight for ambient value */
81	greg	1.1	double ambacc = 0.2; /* ambient accuracy */
82	greg	2.19	int ambres = 128; /* ambient resolution */
83			int ambdiv = 512; /* ambient divisions */
84	greg	1.1	int ambssamp = 0; /* ambient super-samples */
85			int ambounce = 0; /* ambient bounces */
86			char amblist[128]; / ambient include/exclude list */
87			int ambincl = -1; /* include == 1, exclude == 0 */
88
89	gregl	2.25
90	greg	1.1	static RAY thisray; /* for our convenience */
91
92	greg	2.29	static void oputo(), oputd(), oputv(), oputl(), oputL(), oputc(),
93	greg	2.9	oputp(), oputn(), oputN(), oputs(), oputw(), oputm();
94	greg	1.1
95	greg	2.27	static void ourtrace(), tabin();
96			static void (ray_out[16])(), (every_out[16])();
97	greg	2.14	static int castonly = 0;
98	greg	1.1
99	greg	2.27	static void puta(), putf(), putd();
100
101			static void (*putreal)();
102	greg	1.1
103	greg	2.27	void bogusray(), rad(), irrad(), printvals();
104	greg	1.1
105
106	greg	2.27	void
107	greg	1.1	quit(code) /* quit program */
108			int code;
109			{
110	schorsch	2.31	#ifndef NON_POSIX /* XXX we don't clean up elsewhere? */
111	greg	2.11	headclean(); /* delete header file */
112			pfclean(); /* clean up persist files */
113			#endif
114	greg	1.1	exit(code);
115			}
116
117
118	greg	2.6	char *
119			formstr(f) /* return format identifier */
120			int f;
121			{
122			switch (f) {
123			case 'a': return("ascii");
124			case 'f': return("float");
125			case 'd': return("double");
126			case 'c': return(COLRFMT);
127			}
128			return("unknown");
129			}
130
131
132	greg	2.27	void
133	greg	1.1	rtrace(fname) /* trace rays from file */
134			char *fname;
135			{
136			long vcount = hresolu>1 ? hresolu*vresolu : vresolu;
137			long nextflush = hresolu;
138			FILE *fp;
139	gregl	2.25	double d;
140	greg	1.2	FVECT orig, direc;
141	greg	1.1	/* set up input */
142			if (fname == NULL)
143			fp = stdin;
144			else if ((fp = fopen(fname, "r")) == NULL) {
145			sprintf(errmsg, "cannot open input file \"%s\"", fname);
146			error(SYSTEM, errmsg);
147			}
148	schorsch	2.30	#ifdef _WIN32
149	greg	2.8	if (inform != 'a')
150	schorsch	2.30	SET_FILE_BINARY(fp);
151	greg	2.8	#endif
152	greg	1.1	/* set up output */
153	greg	2.16	setoutput(outvals);
154	greg	1.1	switch (outform) {
155			case 'a': putreal = puta; break;
156			case 'f': putreal = putf; break;
157			case 'd': putreal = putd; break;
158	greg	2.6	case 'c':
159			if (strcmp(outvals, "v"))
160			error(USER, "color format with value output only");
161			break;
162			default:
163			error(CONSISTENCY, "botched output format");
164	greg	1.1	}
165	greg	2.12	if (hresolu > 0) {
166			if (vresolu > 0)
167			fprtresolu(hresolu, vresolu, stdout);
168			fflush(stdout);
169			}
170	greg	1.1	/* process file */
171			while (getvec(orig, inform, fp) == 0 &&
172			getvec(direc, inform, fp) == 0) {
173
174	gregl	2.25	d = normalize(direc);
175			if (d == 0.0) { /* zero ==> flush */
176	gregl	2.24	bogusray();
177	gregl	2.26	if (--nextflush <= 0 \|\| vcount <= 0) {
178	gregl	2.24	fflush(stdout);
179			nextflush = hresolu;
180			}
181			} else {
182			samplendx++;
183	greg	1.1	/* compute and print */
184	gregl	2.24	if (imm_irrad)
185			irrad(orig, direc);
186			else
187	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
188	greg	1.7	/* flush if time */
189	gregl	2.24	if (--nextflush == 0) {
190			fflush(stdout);
191			nextflush = hresolu;
192			}
193	greg	1.1	}
194			if (ferror(stdout))
195			error(SYSTEM, "write error");
196			if (--vcount == 0) /* check for end */
197			break;
198			}
199	greg	2.12	fflush(stdout);
200	greg	1.1	if (vcount > 0)
201			error(USER, "read error");
202	greg	2.12	if (fname != NULL)
203			fclose(fp);
204	greg	1.1	}
205
206
207			setoutput(vs) /* set up output tables */
208			register char *vs;
209			{
210	greg	2.27	extern void (*trace)();
211			register void (**table)() = ray_out;
212	greg	1.1
213	greg	1.11	castonly = 1;
214	greg	1.1	while (*vs)
215			switch (*vs++) {
216			case 't': /* trace */
217			*table = NULL;
218			table = every_out;
219			trace = ourtrace;
220	greg	1.11	castonly = 0;
221	greg	1.1	break;
222			case 'o': /* origin */
223			*table++ = oputo;
224			break;
225			case 'd': /* direction */
226			*table++ = oputd;
227			break;
228			case 'v': /* value */
229			*table++ = oputv;
230	greg	1.11	castonly = 0;
231	greg	1.1	break;
232	greg	2.5	case 'l': /* effective distance */
233	greg	1.1	*table++ = oputl;
234	greg	1.11	castonly = 0;
235	greg	1.1	break;
236	greg	2.29	case 'c': /* local coordinates */
237			*table++ = oputc;
238			break;
239	greg	2.5	case 'L': /* single ray length */
240			*table++ = oputL;
241			break;
242	greg	1.1	case 'p': /* point */
243			*table++ = oputp;
244			break;
245	greg	2.9	case 'n': /* perturbed normal */
246	greg	1.1	*table++ = oputn;
247	greg	2.9	castonly = 0;
248	greg	1.1	break;
249	greg	2.9	case 'N': /* unperturbed normal */
250			*table++ = oputN;
251			break;
252	greg	1.1	case 's': /* surface */
253			*table++ = oputs;
254			break;
255			case 'w': /* weight */
256			*table++ = oputw;
257			break;
258			case 'm': /* modifier */
259			*table++ = oputm;
260			break;
261			}
262			*table = NULL;
263	gregl	2.24	}
264
265
266	greg	2.27	void
267	gregl	2.24	bogusray() /* print out empty record */
268			{
269			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
270			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
271			rayorigin(&thisray, NULL, PRIMARY, 1.0);
272			printvals(&thisray);
273	greg	1.1	}
274
275
276	greg	2.27	void
277	gregl	2.25	rad(org, dir, dmax) /* compute and print ray value(s) */
278	greg	1.1	FVECT org, dir;
279	gregl	2.25	double dmax;
280	greg	1.1	{
281			VCOPY(thisray.rorg, org);
282			VCOPY(thisray.rdir, dir);
283	gregl	2.25	thisray.rmax = dmax;
284	greg	1.1	rayorigin(&thisray, NULL, PRIMARY, 1.0);
285	gregl	2.25	if (castonly) {
286			if (!localhit(&thisray, &thescene))
287			if (thisray.ro == &Aftplane) { /* clipped */
288			thisray.ro = NULL;
289			thisray.rot = FHUGE;
290			} else
291			sourcehit(&thisray);
292			} else
293	greg	1.11	rayvalue(&thisray);
294	greg	2.16	printvals(&thisray);
295	greg	1.1	}
296
297
298	greg	2.27	void
299	greg	1.13	irrad(org, dir) /* compute immediate irradiance value */
300	greg	1.1	FVECT org, dir;
301			{
302			register int i;
303
304			for (i = 0; i < 3; i++) {
305			thisray.rorg[i] = org[i] + dir[i];
306			thisray.rdir[i] = -dir[i];
307			}
308			rayorigin(&thisray, NULL, PRIMARY, 1.0);
309			/* pretend we hit surface */
310	greg	2.16	thisray.rot = 1.0-1e-4;
311	greg	1.1	thisray.rod = 1.0;
312			VCOPY(thisray.ron, dir);
313			for (i = 0; i < 3; i++) /* fudge factor */
314			thisray.rop[i] = org[i] + 1e-4*dir[i];
315			/* compute and print */
316			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
317	greg	2.16	printvals(&thisray);
318			}
319
320
321	greg	2.27	void
322	greg	2.16	printvals(r) /* print requested ray values */
323			RAY *r;
324			{
325	greg	2.27	register void (**tp)();
326	greg	2.16
327			if (ray_out[0] == NULL)
328			return;
329			for (tp = ray_out; *tp != NULL; tp++)
330			(**tp)(r);
331	greg	1.1	if (outform == 'a')
332			putchar('\n');
333			}
334
335
336	greg	2.27	int
337	greg	1.1	getvec(vec, fmt, fp) /* get a vector from fp */
338			register FVECT vec;
339			int fmt;
340			FILE *fp;
341			{
342			static float vf[3];
343	greg	2.5	static double vd[3];
344	greg	1.19	char buf[32];
345			register int i;
346	greg	1.1
347			switch (fmt) {
348			case 'a': /* ascii */
349	greg	1.19	for (i = 0; i < 3; i++) {
350			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
351			!isflt(buf))
352			return(-1);
353			vec[i] = atof(buf);
354			}
355	greg	1.1	break;
356			case 'f': /* binary float */
357	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
358	greg	1.1	return(-1);
359			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
360			break;
361			case 'd': /* binary double */
362	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
363	greg	1.1	return(-1);
364	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
365	greg	1.1	break;
366	greg	2.6	default:
367			error(CONSISTENCY, "botched input format");
368	greg	1.1	}
369			return(0);
370			}
371
372
373	greg	2.27	void
374	greg	2.15	tranotify(obj) /* record new modifier */
375			OBJECT obj;
376			{
377			static int hitlimit = 0;
378			register OBJREC *o = objptr(obj);
379			register char **tralp;
380
381	greg	2.27	if (obj == OVOID) { /* starting over */
382			traset[0] = 0;
383			hitlimit = 0;
384			return;
385			}
386	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
387			return;
388			for (tralp = tralist; *tralp != NULL; tralp++)
389			if (!strcmp(o->oname, *tralp)) {
390			if (traset[0] >= MAXTSET) {
391			error(WARNING, "too many modifiers in trace list");
392			hitlimit++;
393			return; /* should this be fatal? */
394			}
395			insertelem(traset, obj);
396			return;
397			}
398			}
399
400
401	greg	2.27	static void
402	greg	1.1	ourtrace(r) /* print ray values */
403			RAY *r;
404			{
405	greg	2.27	register void (**tp)();
406	greg	1.1
407			if (every_out[0] == NULL)
408	greg	2.15	return;
409	greg	2.16	if (r->ro == NULL) {
410			if (traincl == 1)
411			return;
412			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
413	greg	1.1	return;
414			tabin(r);
415			for (tp = every_out; *tp != NULL; tp++)
416			(**tp)(r);
417			putchar('\n');
418			}
419
420
421	greg	2.27	static void
422	greg	1.1	tabin(r) /* tab in appropriate amount */
423			RAY *r;
424			{
425			register RAY *rp;
426
427			for (rp = r->parent; rp != NULL; rp = rp->parent)
428			putchar('\t');
429			}
430
431
432	greg	2.27	static void
433	greg	1.1	oputo(r) /* print origin */
434	greg	2.29	RAY *r;
435	greg	1.1	{
436			(*putreal)(r->rorg[0]);
437			(*putreal)(r->rorg[1]);
438			(*putreal)(r->rorg[2]);
439			}
440
441
442	greg	2.27	static void
443	greg	1.1	oputd(r) /* print direction */
444	greg	2.29	RAY *r;
445	greg	1.1	{
446			(*putreal)(r->rdir[0]);
447			(*putreal)(r->rdir[1]);
448			(*putreal)(r->rdir[2]);
449			}
450
451
452	greg	2.27	static void
453	greg	1.1	oputv(r) /* print value */
454	greg	2.29	RAY *r;
455	greg	1.1	{
456	greg	2.6	COLR cout;
457
458			if (outform == 'c') {
459			setcolr(cout, colval(r->rcol,RED),
460			colval(r->rcol,GRN),
461			colval(r->rcol,BLU));
462			fwrite((char *)cout, sizeof(cout), 1, stdout);
463			return;
464			}
465	greg	1.1	(*putreal)(colval(r->rcol,RED));
466			(*putreal)(colval(r->rcol,GRN));
467			(*putreal)(colval(r->rcol,BLU));
468			}
469
470
471	greg	2.27	static void
472	greg	2.5	oputl(r) /* print effective distance */
473	greg	2.29	RAY *r;
474	greg	1.1	{
475	greg	1.9	(*putreal)(r->rt);
476	greg	2.5	}
477
478
479	greg	2.27	static void
480	greg	2.5	oputL(r) /* print single ray length */
481	greg	2.29	RAY *r;
482	greg	2.5	{
483			(*putreal)(r->rot);
484	greg	1.1	}
485
486
487	greg	2.27	static void
488	greg	2.29	oputc(r) /* print local coordinates */
489			RAY *r;
490			{
491			(*putreal)(r->uv[0]);
492			(*putreal)(r->uv[1]);
493			}
494
495
496			static void
497	greg	1.1	oputp(r) /* print point */
498	greg	2.29	RAY *r;
499	greg	1.1	{
500			if (r->rot < FHUGE) {
501			(*putreal)(r->rop[0]);
502			(*putreal)(r->rop[1]);
503			(*putreal)(r->rop[2]);
504			} else {
505			(*putreal)(0.0);
506			(*putreal)(0.0);
507			(*putreal)(0.0);
508			}
509			}
510
511
512	greg	2.27	static void
513	greg	2.9	oputN(r) /* print unperturbed normal */
514	greg	2.29	RAY *r;
515	greg	1.1	{
516			if (r->rot < FHUGE) {
517			(*putreal)(r->ron[0]);
518			(*putreal)(r->ron[1]);
519			(*putreal)(r->ron[2]);
520			} else {
521			(*putreal)(0.0);
522			(*putreal)(0.0);
523			(*putreal)(0.0);
524			}
525	greg	2.9	}
526
527
528	greg	2.27	static void
529	greg	2.9	oputn(r) /* print perturbed normal */
530			RAY *r;
531			{
532			FVECT pnorm;
533
534			if (r->rot >= FHUGE) {
535			(*putreal)(0.0);
536			(*putreal)(0.0);
537			(*putreal)(0.0);
538			return;
539			}
540			raynormal(pnorm, r);
541			(*putreal)(pnorm[0]);
542			(*putreal)(pnorm[1]);
543			(*putreal)(pnorm[2]);
544	greg	1.1	}
545
546
547	greg	2.27	static void
548	greg	1.1	oputs(r) /* print name */
549	greg	2.29	RAY *r;
550	greg	1.1	{
551			if (r->ro != NULL)
552			fputs(r->ro->oname, stdout);
553			else
554			putchar('*');
555			putchar('\t');
556			}
557
558
559	greg	2.27	static void
560	greg	1.1	oputw(r) /* print weight */
561	greg	2.29	RAY *r;
562	greg	1.1	{
563			(*putreal)(r->rweight);
564			}
565
566
567	greg	2.27	static void
568	greg	1.1	oputm(r) /* print modifier */
569	greg	2.29	RAY *r;
570	greg	1.1	{
571			if (r->ro != NULL)
572	greg	2.23	if (r->ro->omod != OVOID)
573			fputs(objptr(r->ro->omod)->oname, stdout);
574			else
575			fputs(VOIDID, stdout);
576	greg	1.1	else
577			putchar('*');
578			putchar('\t');
579			}
580
581
582	greg	2.27	static void
583	greg	1.1	puta(v) /* print ascii value */
584			double v;
585			{
586			printf("%e\t", v);
587			}
588
589
590	greg	2.27	static void
591	greg	1.1	putd(v) /* print binary double */
592			double v;
593			{
594	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
595	greg	1.1	}
596
597
598	greg	2.27	static void
599	greg	1.1	putf(v) /* print binary float */
600			double v;
601			{
602			float f = v;
603
604	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
605	greg	1.1	}