src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: rtrace.c,v 2.56 2009/07/17 06:21:29 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"
#include  "random.h"

extern int  inform;                     /* input format */
extern int  outform;                    /* output format */
extern char  *outvals;                  /* output values */

extern int  imm_irrad;                  /* compute immediate irradiance? */
extern int  lim_dist;                   /* limit distance? */

extern char  *tralist[];                /* list of modifers to trace (or no) */
extern int  traincl;                    /* include == 1, exclude == 0 */

extern int  hresolu;                    /* horizontal resolution */
extern int  vresolu;                    /* vertical resolution */

static int  castonly = 0;

#ifndef  MAXTSET
#define  MAXTSET        8191            /* maximum number in trace set */
#endif
OBJECT  traset[MAXTSET+1]={0};          /* trace include/exclude set */

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, oputV, oputl, oputL, oputc, oputp,
                oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde;

static void setoutput(char *vs);
extern 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 int 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
quit(                   /* quit program */
        int  code
)
{
        if (ray_pnprocs > 0)    /* close children if any */
                ray_pclose(0);          
#ifndef  NON_POSIX
        headclean();            /* delete header file */
        pfclean();              /* clean up persist files */
#endif
        exit(code);
}


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");
        }
        ray_fifo_out = printvals;
        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 */
                        if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
                                error(USER, "lost children");
                        bogusray();
                        if (--nextflush <= 0 || !vcount) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                } else {                                /* compute and print */
                        if (imm_irrad)
                                irrad(orig, direc);
                        else
                                rad(orig, direc, lim_dist ? d : 0.0);
                                                        /* flush if time */
                        if (!--nextflush) {
                                if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
                                        error(USER, "lost children");
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                }
                if (ferror(stdout))
                        error(SYSTEM, "write error");
                if (vcount && !--vcount)                /* check for end */
                        break;
        }
        if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
                error(USER, "unable to complete processing");
        if (fflush(stdout) < 0)
                error(SYSTEM, "write error");
        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 */
        char  *vs
)
{
        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 'V':                               /* contribution */
                        *table++ = oputV;
                        if (ambounce > 0 && (ambacc > FTINY || ambssamp > 0))
                                error(WARNING,
                                        "-otV accuracy depends on -aa 0 -as 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;
        if (ray_pnprocs > 1) {
                if (ray_fifo_in(&thisray) < 0)
                        error(USER, "lost children");
                return;
        }
        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
                ray_trace(&thisray);
        printvals(&thisray);
}


static void
irrad(                  /* compute immediate irradiance value */
        FVECT  org,
        FVECT  dir
)
{
        VSUM(thisray.rorg, org, dir, 1.1e-4);
        thisray.rdir[0] = -dir[0];
        thisray.rdir[1] = -dir[1];
        thisray.rdir[2] = -dir[2];
        thisray.rmax = 0.0;
        rayorigin(&thisray, PRIMARY, NULL, NULL);
                                        /* pretend we hit surface */
        thisray.rot = 1e-5;
        thisray.rod = 1.0;
        VCOPY(thisray.ron, dir);
        VSUM(thisray.rop, org, dir, 1e-4);
                                        /* compute and print */
        (*ofun[Lamb.otype].funp)(&Lamb, &thisray);
        printvals(&thisray);
}


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

        if (ray_out[0] == NULL)
                return(0);
        for (tp = ray_out; *tp != NULL; tp++)
                (**tp)(r);
        if (outform == 'a')
                putchar('\n');
        return(1);
}


static int
getvec(         /* get a vector from fp */
        FVECT  vec,
        int  fmt,
        FILE  *fp
)
{
        static float  vf[3];
        static double  vd[3];
        char  buf[32];
        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(                      /* record new modifier */
        OBJECT  obj
)
{
        static int  hitlimit = 0;
        OBJREC   *o = objptr(obj);
        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
)
{
        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
oputV(                          /* print value contribution */
        RAY *r
)
{
        double  contr[3];

        raycontrib(contr, r, PRIMARY);
        multcolor(contr, r->rcol);
        (*putreal)(contr[RED]);
        (*putreal)(contr[GRN]);
        (*putreal)(contr[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 coefficient */
        RAY  *r
)
{
        double  contr[3];

        raycontrib(contr, r, PRIMARY);
        (*putreal)(contr[RED]);
        (*putreal)(contr[GRN]);
        (*putreal)(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:	2.57
Committed:	Sat Dec 12 19:01:00 2009 UTC (14 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.56:	+40 -77 lines
Log Message:	Added -n option to rtrace and moved quit() funciton out of raypcalls
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.57	static const char RCSid[] = "$Id: rtrace.c,v 2.56 2009/07/17 06:21:29 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	schorsch	2.49	#include "random.h"
33	greg	2.6
34	greg	2.57	extern int inform; /* input format */
35			extern int outform; /* output format */
36			extern char outvals; / output values */
37	greg	2.27
38	greg	2.57	extern int imm_irrad; /* compute immediate irradiance? */
39			extern int lim_dist; /* limit distance? */
40	greg	1.14
41	greg	2.57	extern char tralist[]; / list of modifers to trace (or no) */
42			extern int traincl; /* include == 1, exclude == 0 */
43	greg	1.13
44	greg	2.57	extern int hresolu; /* horizontal resolution */
45			extern int vresolu; /* vertical resolution */
46	greg	1.1
47	greg	2.57	static int castonly = 0;
48	greg	2.55
49	greg	2.46	#ifndef MAXTSET
50	greg	2.55	#define MAXTSET 8191 /* maximum number in trace set */
51	greg	2.46	#endif
52	greg	2.15	OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
53
54	greg	1.1	static RAY thisray; /* for our convenience */
55
56	schorsch	2.37	typedef void putf_t(double v);
57			static putf_t puta, putd, putf;
58	greg	1.1
59	schorsch	2.37	typedef void oputf_t(RAY *r);
60	greg	2.51	static oputf_t oputo, oputd, oputv, oputV, oputl, oputL, oputc, oputp,
61	greg	2.42	oputn, oputN, oputs, oputw, oputW, oputm, oputM, oputtilde;
62	schorsch	2.37
63			static void setoutput(char *vs);
64	greg	2.57	extern void tranotify(OBJECT obj);
65	schorsch	2.37	static void bogusray(void);
66	greg	2.57	static void rad(FVECT org, FVECT dir, double dmax);
67			static void irrad(FVECT org, FVECT dir);
68			static int printvals(RAY *r);
69			static int getvec(FVECT vec, int fmt, FILE *fp);
70			static void tabin(RAY *r);
71			static void ourtrace(RAY *r);
72	greg	1.1
73	schorsch	2.37	static oputf_t ray_out[16], every_out[16];
74			static putf_t *putreal;
75	greg	2.27
76	greg	1.1
77	greg	2.27	void
78	schorsch	2.37	quit( /* quit program */
79			int code
80			)
81	greg	1.1	{
82	greg	2.57	if (ray_pnprocs > 0) /* close children if any */
83			ray_pclose(0);
84			#ifndef NON_POSIX
85	greg	2.11	headclean(); /* delete header file */
86			pfclean(); /* clean up persist files */
87			#endif
88	greg	1.1	exit(code);
89			}
90
91
92	greg	2.57	char *
93	schorsch	2.37	formstr( /* return format identifier */
94			int f
95			)
96	greg	2.6	{
97			switch (f) {
98			case 'a': return("ascii");
99			case 'f': return("float");
100			case 'd': return("double");
101			case 'c': return(COLRFMT);
102			}
103			return("unknown");
104			}
105
106
107	schorsch	2.37	extern void
108			rtrace( /* trace rays from file */
109			char *fname
110			)
111	greg	1.1	{
112	greg	2.45	unsigned long vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu
113			: vresolu;
114	greg	1.1	long nextflush = hresolu;
115			FILE *fp;
116	gregl	2.25	double d;
117	greg	1.2	FVECT orig, direc;
118	greg	1.1	/* set up input */
119			if (fname == NULL)
120			fp = stdin;
121			else if ((fp = fopen(fname, "r")) == NULL) {
122			sprintf(errmsg, "cannot open input file \"%s\"", fname);
123			error(SYSTEM, errmsg);
124			}
125	greg	2.8	if (inform != 'a')
126	schorsch	2.30	SET_FILE_BINARY(fp);
127	greg	1.1	/* set up output */
128	greg	2.16	setoutput(outvals);
129	greg	1.1	switch (outform) {
130			case 'a': putreal = puta; break;
131			case 'f': putreal = putf; break;
132			case 'd': putreal = putd; break;
133	greg	2.6	case 'c':
134			if (strcmp(outvals, "v"))
135			error(USER, "color format with value output only");
136			break;
137			default:
138			error(CONSISTENCY, "botched output format");
139	greg	1.1	}
140	greg	2.57	ray_fifo_out = printvals;
141	greg	2.12	if (hresolu > 0) {
142			if (vresolu > 0)
143			fprtresolu(hresolu, vresolu, stdout);
144			fflush(stdout);
145			}
146	greg	1.1	/* process file */
147			while (getvec(orig, inform, fp) == 0 &&
148			getvec(direc, inform, fp) == 0) {
149
150	gregl	2.25	d = normalize(direc);
151			if (d == 0.0) { /* zero ==> flush */
152	greg	2.57	if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
153			error(USER, "lost children");
154	gregl	2.24	bogusray();
155	greg	2.45	if (--nextflush <= 0 \|\| !vcount) {
156	gregl	2.24	fflush(stdout);
157			nextflush = hresolu;
158			}
159	greg	2.57	} else { /* compute and print */
160	gregl	2.24	if (imm_irrad)
161			irrad(orig, direc);
162			else
163	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
164	greg	1.7	/* flush if time */
165	greg	2.45	if (!--nextflush) {
166	greg	2.57	if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
167			error(USER, "lost children");
168	gregl	2.24	fflush(stdout);
169			nextflush = hresolu;
170			}
171	greg	1.1	}
172			if (ferror(stdout))
173			error(SYSTEM, "write error");
174	greg	2.45	if (vcount && !--vcount) /* check for end */
175	greg	1.1	break;
176			}
177	greg	2.57	if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
178			error(USER, "unable to complete processing");
179	greg	2.50	if (fflush(stdout) < 0)
180			error(SYSTEM, "write error");
181	greg	2.45	if (vcount)
182	greg	2.42	error(USER, "unexpected EOF on input");
183	greg	2.12	if (fname != NULL)
184			fclose(fp);
185	greg	1.1	}
186
187
188	schorsch	2.37	static void
189	greg	2.40	trace_sources(void) /* trace rays to light sources, also */
190			{
191			int sn;
192
193			for (sn = 0; sn < nsources; sn++)
194			source[sn].sflags \|= SFOLLOW;
195			}
196
197
198			static void
199	schorsch	2.37	setoutput( /* set up output tables */
200	greg	2.56	char *vs
201	schorsch	2.37	)
202	greg	1.1	{
203	greg	2.56	oputf_t **table = ray_out;
204	greg	1.1
205	greg	1.11	castonly = 1;
206	greg	1.1	while (*vs)
207			switch (*vs++) {
208	greg	2.40	case 'T': /* trace sources */
209	greg	2.42	if (!*vs) break;
210	greg	2.40	trace_sources();
211			/* fall through */
212	greg	1.1	case 't': /* trace */
213	greg	2.42	if (!*vs) break;
214	greg	1.1	*table = NULL;
215			table = every_out;
216			trace = ourtrace;
217	greg	1.11	castonly = 0;
218	greg	1.1	break;
219			case 'o': /* origin */
220			*table++ = oputo;
221			break;
222			case 'd': /* direction */
223			*table++ = oputd;
224			break;
225			case 'v': /* value */
226			*table++ = oputv;
227	greg	1.11	castonly = 0;
228	greg	1.1	break;
229	greg	2.51	case 'V': /* contribution */
230			*table++ = oputV;
231			if (ambounce > 0 && (ambacc > FTINY \|\| ambssamp > 0))
232			error(WARNING,
233			"-otV accuracy depends on -aa 0 -as 0");
234			break;
235	greg	2.5	case 'l': /* effective distance */
236	greg	1.1	*table++ = oputl;
237	greg	1.11	castonly = 0;
238	greg	1.1	break;
239	greg	2.29	case 'c': /* local coordinates */
240			*table++ = oputc;
241			break;
242	greg	2.5	case 'L': /* single ray length */
243			*table++ = oputL;
244			break;
245	greg	1.1	case 'p': /* point */
246			*table++ = oputp;
247			break;
248	greg	2.9	case 'n': /* perturbed normal */
249	greg	1.1	*table++ = oputn;
250	greg	2.9	castonly = 0;
251	greg	1.1	break;
252	greg	2.9	case 'N': /* unperturbed normal */
253			*table++ = oputN;
254			break;
255	greg	1.1	case 's': /* surface */
256			*table++ = oputs;
257			break;
258			case 'w': /* weight */
259			*table++ = oputw;
260			break;
261	greg	2.40	case 'W': /* coefficient */
262			*table++ = oputW;
263			if (ambounce > 0 && (ambacc > FTINY \|\| ambssamp > 0))
264			error(WARNING,
265	greg	2.41	"-otW accuracy depends on -aa 0 -as 0");
266	greg	2.40	break;
267	greg	1.1	case 'm': /* modifier */
268			*table++ = oputm;
269			break;
270	greg	2.39	case 'M': /* material */
271			*table++ = oputM;
272			break;
273	greg	2.42	case '~': /* tilde */
274			*table++ = oputtilde;
275	greg	2.41	break;
276	greg	1.1	}
277			*table = NULL;
278	gregl	2.24	}
279
280
281	schorsch	2.37	static void
282			bogusray(void) /* print out empty record */
283	gregl	2.24	{
284			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
285			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
286	greg	2.40	thisray.rmax = 0.0;
287			rayorigin(&thisray, PRIMARY, NULL, NULL);
288	gregl	2.24	printvals(&thisray);
289	greg	1.1	}
290
291
292	schorsch	2.37	static void
293			rad( /* compute and print ray value(s) */
294			FVECT org,
295			FVECT dir,
296			double dmax
297			)
298	greg	1.1	{
299			VCOPY(thisray.rorg, org);
300			VCOPY(thisray.rdir, dir);
301	gregl	2.25	thisray.rmax = dmax;
302	greg	2.57	if (ray_pnprocs > 1) {
303			if (ray_fifo_in(&thisray) < 0)
304			error(USER, "lost children");
305			return;
306			}
307	greg	2.40	rayorigin(&thisray, PRIMARY, NULL, NULL);
308	gregl	2.25	if (castonly) {
309	schorsch	2.33	if (!localhit(&thisray, &thescene)) {
310	gregl	2.25	if (thisray.ro == &Aftplane) { /* clipped */
311			thisray.ro = NULL;
312			thisray.rot = FHUGE;
313			} else
314			sourcehit(&thisray);
315	schorsch	2.33	}
316	gregl	2.25	} else
317	greg	2.57	ray_trace(&thisray);
318	greg	2.16	printvals(&thisray);
319	greg	1.1	}
320
321
322	schorsch	2.37	static void
323			irrad( /* compute immediate irradiance value */
324			FVECT org,
325			FVECT dir
326			)
327	greg	1.1	{
328	greg	2.56	VSUM(thisray.rorg, org, dir, 1.1e-4);
329			thisray.rdir[0] = -dir[0];
330			thisray.rdir[1] = -dir[1];
331			thisray.rdir[2] = -dir[2];
332	greg	2.40	thisray.rmax = 0.0;
333			rayorigin(&thisray, PRIMARY, NULL, NULL);
334	greg	1.1	/* pretend we hit surface */
335	greg	2.56	thisray.rot = 1e-5;
336	greg	1.1	thisray.rod = 1.0;
337			VCOPY(thisray.ron, dir);
338	greg	2.56	VSUM(thisray.rop, org, dir, 1e-4);
339	greg	1.1	/* compute and print */
340			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
341	greg	2.16	printvals(&thisray);
342			}
343
344
345	greg	2.57	static int
346	schorsch	2.37	printvals( /* print requested ray values */
347			RAY *r
348			)
349	greg	2.16	{
350	greg	2.56	oputf_t **tp;
351	greg	2.16
352			if (ray_out[0] == NULL)
353	greg	2.57	return(0);
354	greg	2.16	for (tp = ray_out; *tp != NULL; tp++)
355			(**tp)(r);
356	greg	1.1	if (outform == 'a')
357			putchar('\n');
358	greg	2.57	return(1);
359	greg	1.1	}
360
361
362	schorsch	2.37	static int
363			getvec( /* get a vector from fp */
364	greg	2.56	FVECT vec,
365	schorsch	2.37	int fmt,
366			FILE *fp
367			)
368	greg	1.1	{
369			static float vf[3];
370	greg	2.5	static double vd[3];
371	greg	1.19	char buf[32];
372	greg	2.56	int i;
373	greg	1.1
374			switch (fmt) {
375			case 'a': /* ascii */
376	greg	1.19	for (i = 0; i < 3; i++) {
377			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
378			!isflt(buf))
379			return(-1);
380			vec[i] = atof(buf);
381			}
382	greg	1.1	break;
383			case 'f': /* binary float */
384	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
385	greg	1.1	return(-1);
386			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
387			break;
388			case 'd': /* binary double */
389	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
390	greg	1.1	return(-1);
391	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
392	greg	1.1	break;
393	greg	2.6	default:
394			error(CONSISTENCY, "botched input format");
395	greg	1.1	}
396			return(0);
397			}
398
399
400	greg	2.57	void
401	schorsch	2.37	tranotify( /* record new modifier */
402			OBJECT obj
403			)
404	greg	2.15	{
405			static int hitlimit = 0;
406	greg	2.56	OBJREC *o = objptr(obj);
407			char **tralp;
408	greg	2.15
409	greg	2.27	if (obj == OVOID) { /* starting over */
410			traset[0] = 0;
411			hitlimit = 0;
412			return;
413			}
414	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
415			return;
416			for (tralp = tralist; *tralp != NULL; tralp++)
417			if (!strcmp(o->oname, *tralp)) {
418			if (traset[0] >= MAXTSET) {
419			error(WARNING, "too many modifiers in trace list");
420			hitlimit++;
421			return; /* should this be fatal? */
422			}
423			insertelem(traset, obj);
424			return;
425			}
426			}
427
428
429	greg	2.27	static void
430	schorsch	2.37	ourtrace( /* print ray values */
431			RAY *r
432			)
433	greg	1.1	{
434	greg	2.56	oputf_t **tp;
435	greg	1.1
436			if (every_out[0] == NULL)
437	greg	2.15	return;
438	greg	2.16	if (r->ro == NULL) {
439			if (traincl == 1)
440			return;
441			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
442	greg	1.1	return;
443			tabin(r);
444			for (tp = every_out; *tp != NULL; tp++)
445			(**tp)(r);
446	greg	2.41	if (outform == 'a')
447			putchar('\n');
448	greg	1.1	}
449
450
451	greg	2.27	static void
452	schorsch	2.37	tabin( /* tab in appropriate amount */
453			RAY *r
454			)
455	greg	1.1	{
456	greg	2.40	const RAY *rp;
457	greg	1.1
458			for (rp = r->parent; rp != NULL; rp = rp->parent)
459			putchar('\t');
460			}
461
462
463	greg	2.27	static void
464	schorsch	2.37	oputo( /* print origin */
465			RAY *r
466			)
467	greg	1.1	{
468			(*putreal)(r->rorg[0]);
469			(*putreal)(r->rorg[1]);
470			(*putreal)(r->rorg[2]);
471			}
472
473
474	greg	2.27	static void
475	schorsch	2.37	oputd( /* print direction */
476			RAY *r
477			)
478	greg	1.1	{
479			(*putreal)(r->rdir[0]);
480			(*putreal)(r->rdir[1]);
481			(*putreal)(r->rdir[2]);
482			}
483
484
485	greg	2.27	static void
486	schorsch	2.37	oputv( /* print value */
487			RAY *r
488			)
489	greg	1.1	{
490	greg	2.6	if (outform == 'c') {
491	greg	2.41	COLR cout;
492	greg	2.6	setcolr(cout, colval(r->rcol,RED),
493			colval(r->rcol,GRN),
494			colval(r->rcol,BLU));
495			fwrite((char *)cout, sizeof(cout), 1, stdout);
496			return;
497			}
498	greg	1.1	(*putreal)(colval(r->rcol,RED));
499			(*putreal)(colval(r->rcol,GRN));
500			(*putreal)(colval(r->rcol,BLU));
501			}
502
503
504	greg	2.27	static void
505	greg	2.51	oputV( /* print value contribution */
506			RAY *r
507			)
508			{
509			double contr[3];
510
511			raycontrib(contr, r, PRIMARY);
512			multcolor(contr, r->rcol);
513			(*putreal)(contr[RED]);
514			(*putreal)(contr[GRN]);
515			(*putreal)(contr[BLU]);
516			}
517
518
519			static void
520	schorsch	2.37	oputl( /* print effective distance */
521			RAY *r
522			)
523	greg	1.1	{
524	greg	1.9	(*putreal)(r->rt);
525	greg	2.5	}
526
527
528	greg	2.27	static void
529	schorsch	2.37	oputL( /* print single ray length */
530			RAY *r
531			)
532	greg	2.5	{
533			(*putreal)(r->rot);
534	greg	1.1	}
535
536
537	greg	2.27	static void
538	schorsch	2.37	oputc( /* print local coordinates */
539			RAY *r
540			)
541	greg	2.29	{
542			(*putreal)(r->uv[0]);
543			(*putreal)(r->uv[1]);
544			}
545
546
547			static void
548	schorsch	2.37	oputp( /* print point */
549			RAY *r
550			)
551	greg	1.1	{
552			if (r->rot < FHUGE) {
553			(*putreal)(r->rop[0]);
554			(*putreal)(r->rop[1]);
555			(*putreal)(r->rop[2]);
556			} else {
557			(*putreal)(0.0);
558			(*putreal)(0.0);
559			(*putreal)(0.0);
560			}
561			}
562
563
564	greg	2.27	static void
565	schorsch	2.37	oputN( /* print unperturbed normal */
566			RAY *r
567			)
568	greg	1.1	{
569			if (r->rot < FHUGE) {
570			(*putreal)(r->ron[0]);
571			(*putreal)(r->ron[1]);
572			(*putreal)(r->ron[2]);
573			} else {
574			(*putreal)(0.0);
575			(*putreal)(0.0);
576			(*putreal)(0.0);
577			}
578	greg	2.9	}
579
580
581	greg	2.27	static void
582	schorsch	2.37	oputn( /* print perturbed normal */
583			RAY *r
584			)
585	greg	2.9	{
586			FVECT pnorm;
587
588			if (r->rot >= FHUGE) {
589			(*putreal)(0.0);
590			(*putreal)(0.0);
591			(*putreal)(0.0);
592			return;
593			}
594			raynormal(pnorm, r);
595			(*putreal)(pnorm[0]);
596			(*putreal)(pnorm[1]);
597			(*putreal)(pnorm[2]);
598	greg	1.1	}
599
600
601	greg	2.27	static void
602	schorsch	2.37	oputs( /* print name */
603			RAY *r
604			)
605	greg	1.1	{
606			if (r->ro != NULL)
607			fputs(r->ro->oname, stdout);
608			else
609			putchar('*');
610			putchar('\t');
611			}
612
613
614	greg	2.27	static void
615	schorsch	2.37	oputw( /* print weight */
616			RAY *r
617			)
618	greg	1.1	{
619			(*putreal)(r->rweight);
620			}
621
622
623	greg	2.27	static void
624	greg	2.51	oputW( /* print coefficient */
625	greg	2.40	RAY *r
626			)
627			{
628	greg	2.48	double contr[3];
629	greg	2.40
630			raycontrib(contr, r, PRIMARY);
631	greg	2.48	(*putreal)(contr[RED]);
632			(*putreal)(contr[GRN]);
633			(*putreal)(contr[BLU]);
634	greg	2.40	}
635
636
637			static void
638	schorsch	2.37	oputm( /* print modifier */
639			RAY *r
640			)
641	greg	1.1	{
642			if (r->ro != NULL)
643	greg	2.23	if (r->ro->omod != OVOID)
644			fputs(objptr(r->ro->omod)->oname, stdout);
645			else
646			fputs(VOIDID, stdout);
647	greg	1.1	else
648			putchar('*');
649			putchar('\t');
650			}
651
652
653	greg	2.27	static void
654	greg	2.39	oputM( /* print material */
655			RAY *r
656			)
657			{
658			OBJREC *mat;
659
660			if (r->ro != NULL) {
661			if ((mat = findmaterial(r->ro)) != NULL)
662			fputs(mat->oname, stdout);
663			else
664			fputs(VOIDID, stdout);
665			} else
666			putchar('*');
667			putchar('\t');
668			}
669
670
671			static void
672	greg	2.42	oputtilde( /* output tilde (spacer) */
673	greg	2.41	RAY *r
674			)
675			{
676	greg	2.42	fputs("~\t", stdout);
677	greg	2.41	}
678
679
680			static void
681	schorsch	2.37	puta( /* print ascii value */
682			double v
683			)
684	greg	1.1	{
685			printf("%e\t", v);
686			}
687
688
689	greg	2.27	static void
690	greg	1.1	putd(v) /* print binary double */
691			double v;
692			{
693	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
694	greg	1.1	}
695
696
697	greg	2.27	static void
698	greg	1.1	putf(v) /* print binary float */
699			double v;
700			{
701			float f = v;
702
703	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
704	greg	1.1	}