src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: rtrace.c,v 2.45 2005/06/10 16:49:42 greg 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  <time.h>

#include  "platform.h"
#include  "ray.h"
#include  "ambient.h"
#include  "source.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 */

char  *tralist[128];                    /* list of modifers to trace (or no) */
int  traincl = -1;                      /* include == 1, exclude == 0 */
#ifndef  MAXTSET
#define  MAXTSET        1024            /* maximum number in trace set */
#endif
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 = .03;               /* shadow threshold */
double  shadcert = .75;                 /* 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 = -10;                    /* maximum recursion depth */
double  minweight = 2e-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 = 0.15;                  /* ambient accuracy */
int  ambres = 256;                      /* ambient resolution */
int  ambdiv = 1024;                     /* ambient divisions */
int  ambssamp = 512;                    /* ambient super-samples */
int  ambounce = 0;                      /* ambient bounces */
char  *amblist[AMBLLEN];                /* ambient include/exclude list */
int  ambincl = -1;                      /* include == 1, exclude == 0 */

static int  castonly = 0;

static RAY  thisray;                    /* for our convenience */

typedef void putf_t(double v);
static putf_t puta, putd, putf;

typedef void oputf_t(RAY *r);
static oputf_t  oputo, oputd, oputv, oputl, oputL, oputc, oputp,
                oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde;

static void setoutput(char *vs);
static void tranotify(OBJECT obj);
static void bogusray(void);
static void rad(FVECT  org, FVECT  dir, double  dmax);
static void irrad(FVECT  org, FVECT  dir);
static void printvals(RAY  *r);
static int getvec(FVECT  vec, int  fmt, FILE  *fp);
static void tabin(RAY  *r);
static void ourtrace(RAY  *r);

static oputf_t *ray_out[16], *every_out[16];
static putf_t *putreal;

void  (*addobjnotify[])() = {ambnotify, tranotify, NULL};


void
quit(                   /* 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);
}


extern char *
formstr(                                /* 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");
}


extern void
rtrace(                         /* trace rays from file */
        char  *fname
)
{
        unsigned long  vcount = (hresolu > 1) ? (unsigned long)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);
        }
        if (inform != 'a')
                SET_FILE_BINARY(fp);
                                        /* 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) {
                                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) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                }
                if (ferror(stdout))
                        error(SYSTEM, "write error");
                if (vcount && !--vcount)                /* check for end */
                        break;
        }
        fflush(stdout);
        if (vcount)
                error(USER, "unexpected EOF on input");
        if (fname != NULL)
                fclose(fp);
}


static void
trace_sources(void)                     /* trace rays to light sources, also */
{
        int     sn;
        
        for (sn = 0; sn < nsources; sn++)
                source[sn].sflags |= SFOLLOW;
}


static void
setoutput(                              /* set up output tables */
        register char  *vs
)
{
        register oputf_t **table = ray_out;

        castonly = 1;
        while (*vs)
                switch (*vs++) {
                case 'T':                               /* trace sources */
                        if (!*vs) break;
                        trace_sources();
                        /* fall through */
                case 't':                               /* trace */
                        if (!*vs) break;
                        *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 'W':                               /* coefficient */
                        *table++ = oputW;
                        if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0))
                                error(WARNING,
                                        "-otW accuracy depends on -aa 0 -as 0");
                        break;
                case 'm':                               /* modifier */
                        *table++ = oputm;
                        break;
                case 'M':                               /* material */
                        *table++ = oputM;
                        break;
                case '~':                               /* tilde */
                        *table++ = oputtilde;
                        break;
                }
        *table = NULL;
}


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


static void
rad(            /* compute and print ray value(s) */
        FVECT  org,
        FVECT  dir,
        double  dmax
)
{
        VCOPY(thisray.rorg, org);
        VCOPY(thisray.rdir, dir);
        thisray.rmax = dmax;
        rayorigin(&thisray, PRIMARY, NULL, NULL);
        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);
}


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

        for (i = 0; i < 3; i++) {
                thisray.rorg[i] = org[i] + dir[i];
                thisray.rdir[i] = -dir[i];
        }
        thisray.rmax = 0.0;
        rayorigin(&thisray, PRIMARY, NULL, NULL);
                                        /* 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);
}


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

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


static int
getvec(         /* 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);
}


static void
tranotify(                      /* 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(                               /* print ray values */
        RAY  *r
)
{
        register oputf_t **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);
        if (outform == 'a')
                putchar('\n');
}


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

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


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


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


static void
oputv(                          /* print value */
        RAY  *r
)
{
        if (outform == 'c') {
                COLR  cout;
                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(                          /* print effective distance */
        RAY  *r
)
{
        (*putreal)(r->rt);
}


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


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


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


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


static void
oputW(                          /* print contribution */
        RAY  *r
)
{
        COLOR   contr;

        raycontrib(contr, r, PRIMARY);
        (*putreal)(colval(contr,RED));
        (*putreal)(colval(contr,GRN));
        (*putreal)(colval(contr,BLU));
}


static void
oputm(                          /* 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
oputM(                          /* print material */
        RAY  *r
)
{
        OBJREC  *mat;

        if (r->ro != NULL) {
                if ((mat = findmaterial(r->ro)) != NULL)
                        fputs(mat->oname, stdout);
                else
                        fputs(VOIDID, stdout);
        } else
                putchar('*');
        putchar('\t');
}


static void
oputtilde(                      /* output tilde (spacer) */
        RAY  *r
)
{
        fputs("~\t", stdout);
}


static void
puta(                           /* 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:	2.46
Committed:	Fri Jun 10 20:44:00 2005 UTC (18 years, 10 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.45:	+4 -2 lines
Log Message:	Fixe in rtcontrib -M option
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.46	static const char RCSid[] = "$Id: rtrace.c,v 2.45 2005/06/10 16:49:42 greg 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	greg	2.32
24			#include <time.h>
25	greg	1.1
26	schorsch	2.30	#include "platform.h"
27	greg	1.1	#include "ray.h"
28	schorsch	2.37	#include "ambient.h"
29			#include "source.h"
30	greg	1.1	#include "otypes.h"
31	greg	2.6	#include "resolu.h"
32
33	greg	2.27	CUBE thescene; /* our scene */
34			OBJECT nsceneobjs; /* number of objects in our scene */
35
36	greg	1.14	int dimlist[MAXDIM]; /* sampling dimensions */
37			int ndims = 0; /* number of sampling dimensions */
38			int samplendx = 0; /* index for this sample */
39
40	greg	1.13	int imm_irrad = 0; /* compute immediate irradiance? */
41	gregl	2.25	int lim_dist = 0; /* limit distance? */
42	greg	1.13
43	greg	1.1	int inform = 'a'; /* input format */
44			int outform = 'a'; /* output format */
45			char outvals = "v"; / output specification */
46
47	greg	2.27	int do_irrad = 0; /* compute irradiance? */
48
49			void (trace)() = NULL; / trace call */
50
51	greg	2.15	char tralist[128]; / list of modifers to trace (or no) */
52			int traincl = -1; /* include == 1, exclude == 0 */
53	greg	2.46	#ifndef MAXTSET
54			#define MAXTSET 1024 /* maximum number in trace set */
55			#endif
56	greg	2.15	OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
57
58	greg	1.1	int hresolu = 0; /* horizontal (scan) size */
59			int vresolu = 0; /* vertical resolution */
60
61			double dstrsrc = 0.0; /* square source distribution */
62	greg	2.35	double shadthresh = .03; /* shadow threshold */
63			double shadcert = .75; /* shadow certainty */
64	greg	2.19	int directrelay = 2; /* number of source relays */
65	greg	1.17	int vspretest = 512; /* virtual source pretest density */
66	greg	2.10	int directvis = 1; /* sources visible? */
67	greg	2.19	double srcsizerat = .2; /* maximum ratio source size/dist. */
68	greg	2.20
69			COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
70	greg	2.22	COLOR salbedo = BLKCOLOR; /* global scattering albedo */
71	greg	2.20	double seccg = 0.; /* global scattering eccentricity */
72			double ssampdist = 0.; /* scatter sampling distance */
73	greg	1.1
74	greg	2.4	double specthresh = .15; /* specular sampling threshold */
75	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
76
77	greg	2.18	int backvis = 1; /* back face visibility */
78
79	greg	2.44	int maxdepth = -10; /* maximum recursion depth */
80	greg	2.34	double minweight = 2e-3; /* minimum ray weight */
81	greg	1.1
82	greg	2.27	char ambfile = NULL; / ambient file name */
83	greg	1.1	COLOR ambval = BLKCOLOR; /* ambient value */
84	greg	2.21	int ambvwt = 0; /* initial weight for ambient value */
85	greg	2.36	double ambacc = 0.15; /* ambient accuracy */
86	greg	2.34	int ambres = 256; /* ambient resolution */
87			int ambdiv = 1024; /* ambient divisions */
88			int ambssamp = 512; /* ambient super-samples */
89	greg	1.1	int ambounce = 0; /* ambient bounces */
90	greg	2.38	char amblist[AMBLLEN]; / ambient include/exclude list */
91	greg	1.1	int ambincl = -1; /* include == 1, exclude == 0 */
92
93	schorsch	2.37	static int castonly = 0;
94	gregl	2.25
95	greg	1.1	static RAY thisray; /* for our convenience */
96
97	schorsch	2.37	typedef void putf_t(double v);
98			static putf_t puta, putd, putf;
99	greg	1.1
100	schorsch	2.37	typedef void oputf_t(RAY *r);
101	greg	2.40	static oputf_t oputo, oputd, oputv, oputl, oputL, oputc, oputp,
102	greg	2.42	oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde;
103	schorsch	2.37
104			static void setoutput(char *vs);
105			static void tranotify(OBJECT obj);
106			static void bogusray(void);
107			static void rad(FVECT org, FVECT dir, double dmax);
108			static void irrad(FVECT org, FVECT dir);
109			static void printvals(RAY *r);
110			static int getvec(FVECT vec, int fmt, FILE *fp);
111			static void tabin(RAY *r);
112			static void ourtrace(RAY *r);
113	greg	1.1
114	schorsch	2.37	static oputf_t ray_out[16], every_out[16];
115			static putf_t *putreal;
116	greg	2.27
117	schorsch	2.37	void (*addobjnotify[])() = {ambnotify, tranotify, NULL};
118	greg	1.1
119
120	greg	2.27	void
121	schorsch	2.37	quit( /* quit program */
122			int code
123			)
124	greg	1.1	{
125	schorsch	2.31	#ifndef NON_POSIX /* XXX we don't clean up elsewhere? */
126	greg	2.11	headclean(); /* delete header file */
127			pfclean(); /* clean up persist files */
128			#endif
129	greg	1.1	exit(code);
130			}
131
132
133	schorsch	2.37	extern char *
134			formstr( /* return format identifier */
135			int f
136			)
137	greg	2.6	{
138			switch (f) {
139			case 'a': return("ascii");
140			case 'f': return("float");
141			case 'd': return("double");
142			case 'c': return(COLRFMT);
143			}
144			return("unknown");
145			}
146
147
148	schorsch	2.37	extern void
149			rtrace( /* trace rays from file */
150			char *fname
151			)
152	greg	1.1	{
153	greg	2.45	unsigned long vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu
154			: vresolu;
155	greg	1.1	long nextflush = hresolu;
156			FILE *fp;
157	gregl	2.25	double d;
158	greg	1.2	FVECT orig, direc;
159	greg	1.1	/* set up input */
160			if (fname == NULL)
161			fp = stdin;
162			else if ((fp = fopen(fname, "r")) == NULL) {
163			sprintf(errmsg, "cannot open input file \"%s\"", fname);
164			error(SYSTEM, errmsg);
165			}
166	greg	2.8	if (inform != 'a')
167	schorsch	2.30	SET_FILE_BINARY(fp);
168	greg	1.1	/* set up output */
169	greg	2.16	setoutput(outvals);
170	greg	1.1	switch (outform) {
171			case 'a': putreal = puta; break;
172			case 'f': putreal = putf; break;
173			case 'd': putreal = putd; break;
174	greg	2.6	case 'c':
175			if (strcmp(outvals, "v"))
176			error(USER, "color format with value output only");
177			break;
178			default:
179			error(CONSISTENCY, "botched output format");
180	greg	1.1	}
181	greg	2.12	if (hresolu > 0) {
182			if (vresolu > 0)
183			fprtresolu(hresolu, vresolu, stdout);
184			fflush(stdout);
185			}
186	greg	1.1	/* process file */
187			while (getvec(orig, inform, fp) == 0 &&
188			getvec(direc, inform, fp) == 0) {
189
190	gregl	2.25	d = normalize(direc);
191			if (d == 0.0) { /* zero ==> flush */
192	gregl	2.24	bogusray();
193	greg	2.45	if (--nextflush <= 0 \|\| !vcount) {
194	gregl	2.24	fflush(stdout);
195			nextflush = hresolu;
196			}
197			} else {
198			samplendx++;
199	greg	1.1	/* compute and print */
200	gregl	2.24	if (imm_irrad)
201			irrad(orig, direc);
202			else
203	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
204	greg	1.7	/* flush if time */
205	greg	2.45	if (!--nextflush) {
206	gregl	2.24	fflush(stdout);
207			nextflush = hresolu;
208			}
209	greg	1.1	}
210			if (ferror(stdout))
211			error(SYSTEM, "write error");
212	greg	2.45	if (vcount && !--vcount) /* check for end */
213	greg	1.1	break;
214			}
215	greg	2.12	fflush(stdout);
216	greg	2.45	if (vcount)
217	greg	2.42	error(USER, "unexpected EOF on input");
218	greg	2.12	if (fname != NULL)
219			fclose(fp);
220	greg	1.1	}
221
222
223	schorsch	2.37	static void
224	greg	2.40	trace_sources(void) /* trace rays to light sources, also */
225			{
226			int sn;
227
228			for (sn = 0; sn < nsources; sn++)
229			source[sn].sflags \|= SFOLLOW;
230			}
231
232
233			static void
234	schorsch	2.37	setoutput( /* set up output tables */
235			register char *vs
236			)
237	greg	1.1	{
238	schorsch	2.37	register oputf_t **table = ray_out;
239	greg	1.1
240	greg	1.11	castonly = 1;
241	greg	1.1	while (*vs)
242			switch (*vs++) {
243	greg	2.40	case 'T': /* trace sources */
244	greg	2.42	if (!*vs) break;
245	greg	2.40	trace_sources();
246			/* fall through */
247	greg	1.1	case 't': /* trace */
248	greg	2.42	if (!*vs) break;
249	greg	1.1	*table = NULL;
250			table = every_out;
251			trace = ourtrace;
252	greg	1.11	castonly = 0;
253	greg	1.1	break;
254			case 'o': /* origin */
255			*table++ = oputo;
256			break;
257			case 'd': /* direction */
258			*table++ = oputd;
259			break;
260			case 'v': /* value */
261			*table++ = oputv;
262	greg	1.11	castonly = 0;
263	greg	1.1	break;
264	greg	2.5	case 'l': /* effective distance */
265	greg	1.1	*table++ = oputl;
266	greg	1.11	castonly = 0;
267	greg	1.1	break;
268	greg	2.29	case 'c': /* local coordinates */
269			*table++ = oputc;
270			break;
271	greg	2.5	case 'L': /* single ray length */
272			*table++ = oputL;
273			break;
274	greg	1.1	case 'p': /* point */
275			*table++ = oputp;
276			break;
277	greg	2.9	case 'n': /* perturbed normal */
278	greg	1.1	*table++ = oputn;
279	greg	2.9	castonly = 0;
280	greg	1.1	break;
281	greg	2.9	case 'N': /* unperturbed normal */
282			*table++ = oputN;
283			break;
284	greg	1.1	case 's': /* surface */
285			*table++ = oputs;
286			break;
287			case 'w': /* weight */
288			*table++ = oputw;
289			break;
290	greg	2.40	case 'W': /* coefficient */
291			*table++ = oputW;
292			if (ambounce > 0 && (ambacc > FTINY \|\| ambssamp > 0))
293			error(WARNING,
294	greg	2.41	"-otW accuracy depends on -aa 0 -as 0");
295	greg	2.40	break;
296	greg	1.1	case 'm': /* modifier */
297			*table++ = oputm;
298			break;
299	greg	2.39	case 'M': /* material */
300			*table++ = oputM;
301			break;
302	greg	2.42	case '~': /* tilde */
303			*table++ = oputtilde;
304	greg	2.41	break;
305	greg	1.1	}
306			*table = NULL;
307	gregl	2.24	}
308
309
310	schorsch	2.37	static void
311			bogusray(void) /* print out empty record */
312	gregl	2.24	{
313			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
314			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
315	greg	2.40	thisray.rmax = 0.0;
316			rayorigin(&thisray, PRIMARY, NULL, NULL);
317	gregl	2.24	printvals(&thisray);
318	greg	1.1	}
319
320
321	schorsch	2.37	static void
322			rad( /* compute and print ray value(s) */
323			FVECT org,
324			FVECT dir,
325			double dmax
326			)
327	greg	1.1	{
328			VCOPY(thisray.rorg, org);
329			VCOPY(thisray.rdir, dir);
330	gregl	2.25	thisray.rmax = dmax;
331	greg	2.40	rayorigin(&thisray, PRIMARY, NULL, NULL);
332	gregl	2.25	if (castonly) {
333	schorsch	2.33	if (!localhit(&thisray, &thescene)) {
334	gregl	2.25	if (thisray.ro == &Aftplane) { /* clipped */
335			thisray.ro = NULL;
336			thisray.rot = FHUGE;
337			} else
338			sourcehit(&thisray);
339	schorsch	2.33	}
340	gregl	2.25	} else
341	greg	1.11	rayvalue(&thisray);
342	greg	2.16	printvals(&thisray);
343	greg	1.1	}
344
345
346	schorsch	2.37	static void
347			irrad( /* compute immediate irradiance value */
348			FVECT org,
349			FVECT dir
350			)
351	greg	1.1	{
352			register int i;
353
354			for (i = 0; i < 3; i++) {
355			thisray.rorg[i] = org[i] + dir[i];
356			thisray.rdir[i] = -dir[i];
357			}
358	greg	2.40	thisray.rmax = 0.0;
359			rayorigin(&thisray, PRIMARY, NULL, NULL);
360	greg	1.1	/* pretend we hit surface */
361	greg	2.16	thisray.rot = 1.0-1e-4;
362	greg	1.1	thisray.rod = 1.0;
363			VCOPY(thisray.ron, dir);
364			for (i = 0; i < 3; i++) /* fudge factor */
365			thisray.rop[i] = org[i] + 1e-4*dir[i];
366			/* compute and print */
367			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
368	greg	2.16	printvals(&thisray);
369			}
370
371
372	schorsch	2.37	static void
373			printvals( /* print requested ray values */
374			RAY *r
375			)
376	greg	2.16	{
377	schorsch	2.37	register oputf_t **tp;
378	greg	2.16
379			if (ray_out[0] == NULL)
380			return;
381			for (tp = ray_out; *tp != NULL; tp++)
382			(**tp)(r);
383	greg	1.1	if (outform == 'a')
384			putchar('\n');
385			}
386
387
388	schorsch	2.37	static int
389			getvec( /* get a vector from fp */
390			register FVECT vec,
391			int fmt,
392			FILE *fp
393			)
394	greg	1.1	{
395			static float vf[3];
396	greg	2.5	static double vd[3];
397	greg	1.19	char buf[32];
398			register int i;
399	greg	1.1
400			switch (fmt) {
401			case 'a': /* ascii */
402	greg	1.19	for (i = 0; i < 3; i++) {
403			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
404			!isflt(buf))
405			return(-1);
406			vec[i] = atof(buf);
407			}
408	greg	1.1	break;
409			case 'f': /* binary float */
410	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
411	greg	1.1	return(-1);
412			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
413			break;
414			case 'd': /* binary double */
415	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
416	greg	1.1	return(-1);
417	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
418	greg	1.1	break;
419	greg	2.6	default:
420			error(CONSISTENCY, "botched input format");
421	greg	1.1	}
422			return(0);
423			}
424
425
426	schorsch	2.37	static void
427			tranotify( /* record new modifier */
428			OBJECT obj
429			)
430	greg	2.15	{
431			static int hitlimit = 0;
432			register OBJREC *o = objptr(obj);
433			register char **tralp;
434
435	greg	2.27	if (obj == OVOID) { /* starting over */
436			traset[0] = 0;
437			hitlimit = 0;
438			return;
439			}
440	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
441			return;
442			for (tralp = tralist; *tralp != NULL; tralp++)
443			if (!strcmp(o->oname, *tralp)) {
444			if (traset[0] >= MAXTSET) {
445			error(WARNING, "too many modifiers in trace list");
446			hitlimit++;
447			return; /* should this be fatal? */
448			}
449			insertelem(traset, obj);
450			return;
451			}
452			}
453
454
455	greg	2.27	static void
456	schorsch	2.37	ourtrace( /* print ray values */
457			RAY *r
458			)
459	greg	1.1	{
460	schorsch	2.37	register oputf_t **tp;
461	greg	1.1
462			if (every_out[0] == NULL)
463	greg	2.15	return;
464	greg	2.16	if (r->ro == NULL) {
465			if (traincl == 1)
466			return;
467			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
468	greg	1.1	return;
469			tabin(r);
470			for (tp = every_out; *tp != NULL; tp++)
471			(**tp)(r);
472	greg	2.41	if (outform == 'a')
473			putchar('\n');
474	greg	1.1	}
475
476
477	greg	2.27	static void
478	schorsch	2.37	tabin( /* tab in appropriate amount */
479			RAY *r
480			)
481	greg	1.1	{
482	greg	2.40	const RAY *rp;
483	greg	1.1
484			for (rp = r->parent; rp != NULL; rp = rp->parent)
485			putchar('\t');
486			}
487
488
489	greg	2.27	static void
490	schorsch	2.37	oputo( /* print origin */
491			RAY *r
492			)
493	greg	1.1	{
494			(*putreal)(r->rorg[0]);
495			(*putreal)(r->rorg[1]);
496			(*putreal)(r->rorg[2]);
497			}
498
499
500	greg	2.27	static void
501	schorsch	2.37	oputd( /* print direction */
502			RAY *r
503			)
504	greg	1.1	{
505			(*putreal)(r->rdir[0]);
506			(*putreal)(r->rdir[1]);
507			(*putreal)(r->rdir[2]);
508			}
509
510
511	greg	2.27	static void
512	schorsch	2.37	oputv( /* print value */
513			RAY *r
514			)
515	greg	1.1	{
516	greg	2.6	if (outform == 'c') {
517	greg	2.41	COLR cout;
518	greg	2.6	setcolr(cout, colval(r->rcol,RED),
519			colval(r->rcol,GRN),
520			colval(r->rcol,BLU));
521			fwrite((char *)cout, sizeof(cout), 1, stdout);
522			return;
523			}
524	greg	1.1	(*putreal)(colval(r->rcol,RED));
525			(*putreal)(colval(r->rcol,GRN));
526			(*putreal)(colval(r->rcol,BLU));
527			}
528
529
530	greg	2.27	static void
531	schorsch	2.37	oputl( /* print effective distance */
532			RAY *r
533			)
534	greg	1.1	{
535	greg	1.9	(*putreal)(r->rt);
536	greg	2.5	}
537
538
539	greg	2.27	static void
540	schorsch	2.37	oputL( /* print single ray length */
541			RAY *r
542			)
543	greg	2.5	{
544			(*putreal)(r->rot);
545	greg	1.1	}
546
547
548	greg	2.27	static void
549	schorsch	2.37	oputc( /* print local coordinates */
550			RAY *r
551			)
552	greg	2.29	{
553			(*putreal)(r->uv[0]);
554			(*putreal)(r->uv[1]);
555			}
556
557
558			static void
559	schorsch	2.37	oputp( /* print point */
560			RAY *r
561			)
562	greg	1.1	{
563			if (r->rot < FHUGE) {
564			(*putreal)(r->rop[0]);
565			(*putreal)(r->rop[1]);
566			(*putreal)(r->rop[2]);
567			} else {
568			(*putreal)(0.0);
569			(*putreal)(0.0);
570			(*putreal)(0.0);
571			}
572			}
573
574
575	greg	2.27	static void
576	schorsch	2.37	oputN( /* print unperturbed normal */
577			RAY *r
578			)
579	greg	1.1	{
580			if (r->rot < FHUGE) {
581			(*putreal)(r->ron[0]);
582			(*putreal)(r->ron[1]);
583			(*putreal)(r->ron[2]);
584			} else {
585			(*putreal)(0.0);
586			(*putreal)(0.0);
587			(*putreal)(0.0);
588			}
589	greg	2.9	}
590
591
592	greg	2.27	static void
593	schorsch	2.37	oputn( /* print perturbed normal */
594			RAY *r
595			)
596	greg	2.9	{
597			FVECT pnorm;
598
599			if (r->rot >= FHUGE) {
600			(*putreal)(0.0);
601			(*putreal)(0.0);
602			(*putreal)(0.0);
603			return;
604			}
605			raynormal(pnorm, r);
606			(*putreal)(pnorm[0]);
607			(*putreal)(pnorm[1]);
608			(*putreal)(pnorm[2]);
609	greg	1.1	}
610
611
612	greg	2.27	static void
613	schorsch	2.37	oputs( /* print name */
614			RAY *r
615			)
616	greg	1.1	{
617			if (r->ro != NULL)
618			fputs(r->ro->oname, stdout);
619			else
620			putchar('*');
621			putchar('\t');
622			}
623
624
625	greg	2.27	static void
626	schorsch	2.37	oputw( /* print weight */
627			RAY *r
628			)
629	greg	1.1	{
630			(*putreal)(r->rweight);
631			}
632
633
634	greg	2.27	static void
635	greg	2.40	oputW( /* print contribution */
636			RAY *r
637			)
638			{
639			COLOR contr;
640
641			raycontrib(contr, r, PRIMARY);
642			(*putreal)(colval(contr,RED));
643			(*putreal)(colval(contr,GRN));
644			(*putreal)(colval(contr,BLU));
645			}
646
647
648			static void
649	schorsch	2.37	oputm( /* print modifier */
650			RAY *r
651			)
652	greg	1.1	{
653			if (r->ro != NULL)
654	greg	2.23	if (r->ro->omod != OVOID)
655			fputs(objptr(r->ro->omod)->oname, stdout);
656			else
657			fputs(VOIDID, stdout);
658	greg	1.1	else
659			putchar('*');
660			putchar('\t');
661			}
662
663
664	greg	2.27	static void
665	greg	2.39	oputM( /* print material */
666			RAY *r
667			)
668			{
669			OBJREC *mat;
670
671			if (r->ro != NULL) {
672			if ((mat = findmaterial(r->ro)) != NULL)
673			fputs(mat->oname, stdout);
674			else
675			fputs(VOIDID, stdout);
676			} else
677			putchar('*');
678			putchar('\t');
679			}
680
681
682			static void
683	greg	2.42	oputtilde( /* output tilde (spacer) */
684	greg	2.41	RAY *r
685			)
686			{
687	greg	2.42	fputs("~\t", stdout);
688	greg	2.41	}
689
690
691			static void
692	schorsch	2.37	puta( /* print ascii value */
693			double v
694			)
695	greg	1.1	{
696			printf("%e\t", v);
697			}
698
699
700	greg	2.27	static void
701	greg	1.1	putd(v) /* print binary double */
702			double v;
703			{
704	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
705	greg	1.1	}
706
707
708	greg	2.27	static void
709	greg	1.1	putf(v) /* print binary float */
710			double v;
711			{
712			float f = v;
713
714	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
715	greg	1.1	}