src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: rtrace.c,v 2.57 2009/12/12 19:01:00 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
        else if (!ray_pnprocs) {
                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");
        }
        if (ray_pnprocs > 1)
                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 (!castonly && 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);
                VCOPY(vec, vf);
                break;
        case 'd':                                       /* binary double */
                if (fread((char *)vd, sizeof(double), 3, fp) != 3)
                        return(-1);
                VCOPY(vec, vd);
                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:	2.58
Committed:	Sat Dec 12 23:08:13 2009 UTC (14 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.57:	+10 -7 lines
Log Message:	Bug fixes and performance improvements to rtrace -n option
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.58	static const char RCSid[] = "$Id: rtrace.c,v 2.57 2009/12/12 19:01:00 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	2.58	else if (!ray_pnprocs) {
86			headclean(); /* delete header file */
87			pfclean(); /* clean up persist files */
88			}
89	greg	2.11	#endif
90	greg	1.1	exit(code);
91			}
92
93
94	greg	2.57	char *
95	schorsch	2.37	formstr( /* return format identifier */
96			int f
97			)
98	greg	2.6	{
99			switch (f) {
100			case 'a': return("ascii");
101			case 'f': return("float");
102			case 'd': return("double");
103			case 'c': return(COLRFMT);
104			}
105			return("unknown");
106			}
107
108
109	schorsch	2.37	extern void
110			rtrace( /* trace rays from file */
111			char *fname
112			)
113	greg	1.1	{
114	greg	2.45	unsigned long vcount = (hresolu > 1) ? (unsigned long)hresolu*vresolu
115			: vresolu;
116	greg	1.1	long nextflush = hresolu;
117			FILE *fp;
118	gregl	2.25	double d;
119	greg	1.2	FVECT orig, direc;
120	greg	1.1	/* set up input */
121			if (fname == NULL)
122			fp = stdin;
123			else if ((fp = fopen(fname, "r")) == NULL) {
124			sprintf(errmsg, "cannot open input file \"%s\"", fname);
125			error(SYSTEM, errmsg);
126			}
127	greg	2.8	if (inform != 'a')
128	schorsch	2.30	SET_FILE_BINARY(fp);
129	greg	1.1	/* set up output */
130	greg	2.16	setoutput(outvals);
131	greg	1.1	switch (outform) {
132			case 'a': putreal = puta; break;
133			case 'f': putreal = putf; break;
134			case 'd': putreal = putd; break;
135	greg	2.6	case 'c':
136			if (strcmp(outvals, "v"))
137			error(USER, "color format with value output only");
138			break;
139			default:
140			error(CONSISTENCY, "botched output format");
141	greg	1.1	}
142	greg	2.58	if (ray_pnprocs > 1)
143			ray_fifo_out = printvals;
144	greg	2.12	if (hresolu > 0) {
145			if (vresolu > 0)
146			fprtresolu(hresolu, vresolu, stdout);
147			fflush(stdout);
148			}
149	greg	1.1	/* process file */
150			while (getvec(orig, inform, fp) == 0 &&
151			getvec(direc, inform, fp) == 0) {
152
153	gregl	2.25	d = normalize(direc);
154			if (d == 0.0) { /* zero ==> flush */
155	greg	2.57	if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
156			error(USER, "lost children");
157	gregl	2.24	bogusray();
158	greg	2.45	if (--nextflush <= 0 \|\| !vcount) {
159	gregl	2.24	fflush(stdout);
160			nextflush = hresolu;
161			}
162	greg	2.57	} else { /* compute and print */
163	gregl	2.24	if (imm_irrad)
164			irrad(orig, direc);
165			else
166	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
167	greg	1.7	/* flush if time */
168	greg	2.45	if (!--nextflush) {
169	greg	2.57	if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
170			error(USER, "lost children");
171	gregl	2.24	fflush(stdout);
172			nextflush = hresolu;
173			}
174	greg	1.1	}
175			if (ferror(stdout))
176			error(SYSTEM, "write error");
177	greg	2.45	if (vcount && !--vcount) /* check for end */
178	greg	1.1	break;
179			}
180	greg	2.57	if (ray_pnprocs > 1 && ray_fifo_flush() < 0)
181			error(USER, "unable to complete processing");
182	greg	2.50	if (fflush(stdout) < 0)
183			error(SYSTEM, "write error");
184	greg	2.45	if (vcount)
185	greg	2.42	error(USER, "unexpected EOF on input");
186	greg	2.12	if (fname != NULL)
187			fclose(fp);
188	greg	1.1	}
189
190
191	schorsch	2.37	static void
192	greg	2.40	trace_sources(void) /* trace rays to light sources, also */
193			{
194			int sn;
195
196			for (sn = 0; sn < nsources; sn++)
197			source[sn].sflags \|= SFOLLOW;
198			}
199
200
201			static void
202	schorsch	2.37	setoutput( /* set up output tables */
203	greg	2.56	char *vs
204	schorsch	2.37	)
205	greg	1.1	{
206	greg	2.56	oputf_t **table = ray_out;
207	greg	1.1
208	greg	1.11	castonly = 1;
209	greg	1.1	while (*vs)
210			switch (*vs++) {
211	greg	2.40	case 'T': /* trace sources */
212	greg	2.42	if (!*vs) break;
213	greg	2.40	trace_sources();
214			/* fall through */
215	greg	1.1	case 't': /* trace */
216	greg	2.42	if (!*vs) break;
217	greg	1.1	*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	2.51	case 'V': /* contribution */
233			*table++ = oputV;
234			if (ambounce > 0 && (ambacc > FTINY \|\| ambssamp > 0))
235			error(WARNING,
236			"-otV accuracy depends on -aa 0 -as 0");
237			break;
238	greg	2.5	case 'l': /* effective distance */
239	greg	1.1	*table++ = oputl;
240	greg	1.11	castonly = 0;
241	greg	1.1	break;
242	greg	2.29	case 'c': /* local coordinates */
243			*table++ = oputc;
244			break;
245	greg	2.5	case 'L': /* single ray length */
246			*table++ = oputL;
247			break;
248	greg	1.1	case 'p': /* point */
249			*table++ = oputp;
250			break;
251	greg	2.9	case 'n': /* perturbed normal */
252	greg	1.1	*table++ = oputn;
253	greg	2.9	castonly = 0;
254	greg	1.1	break;
255	greg	2.9	case 'N': /* unperturbed normal */
256			*table++ = oputN;
257			break;
258	greg	1.1	case 's': /* surface */
259			*table++ = oputs;
260			break;
261			case 'w': /* weight */
262			*table++ = oputw;
263			break;
264	greg	2.40	case 'W': /* coefficient */
265			*table++ = oputW;
266			if (ambounce > 0 && (ambacc > FTINY \|\| ambssamp > 0))
267			error(WARNING,
268	greg	2.41	"-otW accuracy depends on -aa 0 -as 0");
269	greg	2.40	break;
270	greg	1.1	case 'm': /* modifier */
271			*table++ = oputm;
272			break;
273	greg	2.39	case 'M': /* material */
274			*table++ = oputM;
275			break;
276	greg	2.42	case '~': /* tilde */
277			*table++ = oputtilde;
278	greg	2.41	break;
279	greg	1.1	}
280			*table = NULL;
281	gregl	2.24	}
282
283
284	schorsch	2.37	static void
285			bogusray(void) /* print out empty record */
286	gregl	2.24	{
287			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
288			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
289	greg	2.40	thisray.rmax = 0.0;
290			rayorigin(&thisray, PRIMARY, NULL, NULL);
291	gregl	2.24	printvals(&thisray);
292	greg	1.1	}
293
294
295	schorsch	2.37	static void
296			rad( /* compute and print ray value(s) */
297			FVECT org,
298			FVECT dir,
299			double dmax
300			)
301	greg	1.1	{
302			VCOPY(thisray.rorg, org);
303			VCOPY(thisray.rdir, dir);
304	gregl	2.25	thisray.rmax = dmax;
305	greg	2.58	if (!castonly && ray_pnprocs > 1) {
306	greg	2.57	if (ray_fifo_in(&thisray) < 0)
307			error(USER, "lost children");
308			return;
309			}
310	greg	2.40	rayorigin(&thisray, PRIMARY, NULL, NULL);
311	gregl	2.25	if (castonly) {
312	schorsch	2.33	if (!localhit(&thisray, &thescene)) {
313	gregl	2.25	if (thisray.ro == &Aftplane) { /* clipped */
314			thisray.ro = NULL;
315			thisray.rot = FHUGE;
316			} else
317			sourcehit(&thisray);
318	schorsch	2.33	}
319	gregl	2.25	} else
320	greg	2.57	ray_trace(&thisray);
321	greg	2.16	printvals(&thisray);
322	greg	1.1	}
323
324
325	schorsch	2.37	static void
326			irrad( /* compute immediate irradiance value */
327			FVECT org,
328			FVECT dir
329			)
330	greg	1.1	{
331	greg	2.56	VSUM(thisray.rorg, org, dir, 1.1e-4);
332			thisray.rdir[0] = -dir[0];
333			thisray.rdir[1] = -dir[1];
334			thisray.rdir[2] = -dir[2];
335	greg	2.40	thisray.rmax = 0.0;
336			rayorigin(&thisray, PRIMARY, NULL, NULL);
337	greg	1.1	/* pretend we hit surface */
338	greg	2.56	thisray.rot = 1e-5;
339	greg	1.1	thisray.rod = 1.0;
340			VCOPY(thisray.ron, dir);
341	greg	2.56	VSUM(thisray.rop, org, dir, 1e-4);
342	greg	1.1	/* compute and print */
343			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
344	greg	2.16	printvals(&thisray);
345			}
346
347
348	greg	2.57	static int
349	schorsch	2.37	printvals( /* print requested ray values */
350			RAY *r
351			)
352	greg	2.16	{
353	greg	2.56	oputf_t **tp;
354	greg	2.16
355			if (ray_out[0] == NULL)
356	greg	2.57	return(0);
357	greg	2.16	for (tp = ray_out; *tp != NULL; tp++)
358			(**tp)(r);
359	greg	1.1	if (outform == 'a')
360			putchar('\n');
361	greg	2.57	return(1);
362	greg	1.1	}
363
364
365	schorsch	2.37	static int
366			getvec( /* get a vector from fp */
367	greg	2.56	FVECT vec,
368	schorsch	2.37	int fmt,
369			FILE *fp
370			)
371	greg	1.1	{
372			static float vf[3];
373	greg	2.5	static double vd[3];
374	greg	1.19	char buf[32];
375	greg	2.56	int i;
376	greg	1.1
377			switch (fmt) {
378			case 'a': /* ascii */
379	greg	1.19	for (i = 0; i < 3; i++) {
380			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
381			!isflt(buf))
382			return(-1);
383			vec[i] = atof(buf);
384			}
385	greg	1.1	break;
386			case 'f': /* binary float */
387	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
388	greg	1.1	return(-1);
389	greg	2.58	VCOPY(vec, vf);
390	greg	1.1	break;
391			case 'd': /* binary double */
392	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
393	greg	1.1	return(-1);
394	greg	2.58	VCOPY(vec, vd);
395	greg	1.1	break;
396	greg	2.6	default:
397			error(CONSISTENCY, "botched input format");
398	greg	1.1	}
399			return(0);
400			}
401
402
403	greg	2.57	void
404	schorsch	2.37	tranotify( /* record new modifier */
405			OBJECT obj
406			)
407	greg	2.15	{
408			static int hitlimit = 0;
409	greg	2.56	OBJREC *o = objptr(obj);
410			char **tralp;
411	greg	2.15
412	greg	2.27	if (obj == OVOID) { /* starting over */
413			traset[0] = 0;
414			hitlimit = 0;
415			return;
416			}
417	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
418			return;
419			for (tralp = tralist; *tralp != NULL; tralp++)
420			if (!strcmp(o->oname, *tralp)) {
421			if (traset[0] >= MAXTSET) {
422			error(WARNING, "too many modifiers in trace list");
423			hitlimit++;
424			return; /* should this be fatal? */
425			}
426			insertelem(traset, obj);
427			return;
428			}
429			}
430
431
432	greg	2.27	static void
433	schorsch	2.37	ourtrace( /* print ray values */
434			RAY *r
435			)
436	greg	1.1	{
437	greg	2.56	oputf_t **tp;
438	greg	1.1
439			if (every_out[0] == NULL)
440	greg	2.15	return;
441	greg	2.16	if (r->ro == NULL) {
442			if (traincl == 1)
443			return;
444			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
445	greg	1.1	return;
446			tabin(r);
447			for (tp = every_out; *tp != NULL; tp++)
448			(**tp)(r);
449	greg	2.41	if (outform == 'a')
450			putchar('\n');
451	greg	1.1	}
452
453
454	greg	2.27	static void
455	schorsch	2.37	tabin( /* tab in appropriate amount */
456			RAY *r
457			)
458	greg	1.1	{
459	greg	2.40	const RAY *rp;
460	greg	1.1
461			for (rp = r->parent; rp != NULL; rp = rp->parent)
462			putchar('\t');
463			}
464
465
466	greg	2.27	static void
467	schorsch	2.37	oputo( /* print origin */
468			RAY *r
469			)
470	greg	1.1	{
471			(*putreal)(r->rorg[0]);
472			(*putreal)(r->rorg[1]);
473			(*putreal)(r->rorg[2]);
474			}
475
476
477	greg	2.27	static void
478	schorsch	2.37	oputd( /* print direction */
479			RAY *r
480			)
481	greg	1.1	{
482			(*putreal)(r->rdir[0]);
483			(*putreal)(r->rdir[1]);
484			(*putreal)(r->rdir[2]);
485			}
486
487
488	greg	2.27	static void
489	schorsch	2.37	oputv( /* print value */
490			RAY *r
491			)
492	greg	1.1	{
493	greg	2.6	if (outform == 'c') {
494	greg	2.41	COLR cout;
495	greg	2.6	setcolr(cout, colval(r->rcol,RED),
496			colval(r->rcol,GRN),
497			colval(r->rcol,BLU));
498			fwrite((char *)cout, sizeof(cout), 1, stdout);
499			return;
500			}
501	greg	1.1	(*putreal)(colval(r->rcol,RED));
502			(*putreal)(colval(r->rcol,GRN));
503			(*putreal)(colval(r->rcol,BLU));
504			}
505
506
507	greg	2.27	static void
508	greg	2.51	oputV( /* print value contribution */
509			RAY *r
510			)
511			{
512			double contr[3];
513
514			raycontrib(contr, r, PRIMARY);
515			multcolor(contr, r->rcol);
516			(*putreal)(contr[RED]);
517			(*putreal)(contr[GRN]);
518			(*putreal)(contr[BLU]);
519			}
520
521
522			static void
523	schorsch	2.37	oputl( /* print effective distance */
524			RAY *r
525			)
526	greg	1.1	{
527	greg	1.9	(*putreal)(r->rt);
528	greg	2.5	}
529
530
531	greg	2.27	static void
532	schorsch	2.37	oputL( /* print single ray length */
533			RAY *r
534			)
535	greg	2.5	{
536			(*putreal)(r->rot);
537	greg	1.1	}
538
539
540	greg	2.27	static void
541	schorsch	2.37	oputc( /* print local coordinates */
542			RAY *r
543			)
544	greg	2.29	{
545			(*putreal)(r->uv[0]);
546			(*putreal)(r->uv[1]);
547			}
548
549
550			static void
551	schorsch	2.37	oputp( /* print point */
552			RAY *r
553			)
554	greg	1.1	{
555			if (r->rot < FHUGE) {
556			(*putreal)(r->rop[0]);
557			(*putreal)(r->rop[1]);
558			(*putreal)(r->rop[2]);
559			} else {
560			(*putreal)(0.0);
561			(*putreal)(0.0);
562			(*putreal)(0.0);
563			}
564			}
565
566
567	greg	2.27	static void
568	schorsch	2.37	oputN( /* print unperturbed normal */
569			RAY *r
570			)
571	greg	1.1	{
572			if (r->rot < FHUGE) {
573			(*putreal)(r->ron[0]);
574			(*putreal)(r->ron[1]);
575			(*putreal)(r->ron[2]);
576			} else {
577			(*putreal)(0.0);
578			(*putreal)(0.0);
579			(*putreal)(0.0);
580			}
581	greg	2.9	}
582
583
584	greg	2.27	static void
585	schorsch	2.37	oputn( /* print perturbed normal */
586			RAY *r
587			)
588	greg	2.9	{
589			FVECT pnorm;
590
591			if (r->rot >= FHUGE) {
592			(*putreal)(0.0);
593			(*putreal)(0.0);
594			(*putreal)(0.0);
595			return;
596			}
597			raynormal(pnorm, r);
598			(*putreal)(pnorm[0]);
599			(*putreal)(pnorm[1]);
600			(*putreal)(pnorm[2]);
601	greg	1.1	}
602
603
604	greg	2.27	static void
605	schorsch	2.37	oputs( /* print name */
606			RAY *r
607			)
608	greg	1.1	{
609			if (r->ro != NULL)
610			fputs(r->ro->oname, stdout);
611			else
612			putchar('*');
613			putchar('\t');
614			}
615
616
617	greg	2.27	static void
618	schorsch	2.37	oputw( /* print weight */
619			RAY *r
620			)
621	greg	1.1	{
622			(*putreal)(r->rweight);
623			}
624
625
626	greg	2.27	static void
627	greg	2.51	oputW( /* print coefficient */
628	greg	2.40	RAY *r
629			)
630			{
631	greg	2.48	double contr[3];
632	greg	2.40
633			raycontrib(contr, r, PRIMARY);
634	greg	2.48	(*putreal)(contr[RED]);
635			(*putreal)(contr[GRN]);
636			(*putreal)(contr[BLU]);
637	greg	2.40	}
638
639
640			static void
641	schorsch	2.37	oputm( /* print modifier */
642			RAY *r
643			)
644	greg	1.1	{
645			if (r->ro != NULL)
646	greg	2.23	if (r->ro->omod != OVOID)
647			fputs(objptr(r->ro->omod)->oname, stdout);
648			else
649			fputs(VOIDID, stdout);
650	greg	1.1	else
651			putchar('*');
652			putchar('\t');
653			}
654
655
656	greg	2.27	static void
657	greg	2.39	oputM( /* print material */
658			RAY *r
659			)
660			{
661			OBJREC *mat;
662
663			if (r->ro != NULL) {
664			if ((mat = findmaterial(r->ro)) != NULL)
665			fputs(mat->oname, stdout);
666			else
667			fputs(VOIDID, stdout);
668			} else
669			putchar('*');
670			putchar('\t');
671			}
672
673
674			static void
675	greg	2.42	oputtilde( /* output tilde (spacer) */
676	greg	2.41	RAY *r
677			)
678			{
679	greg	2.42	fputs("~\t", stdout);
680	greg	2.41	}
681
682
683			static void
684	schorsch	2.37	puta( /* print ascii value */
685			double v
686			)
687	greg	1.1	{
688			printf("%e\t", v);
689			}
690
691
692	greg	2.27	static void
693	greg	1.1	putd(v) /* print binary double */
694			double v;
695			{
696	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
697	greg	1.1	}
698
699
700	greg	2.27	static void
701	greg	1.1	putf(v) /* print binary float */
702			double v;
703			{
704			float f = v;
705
706	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
707	greg	1.1	}