src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: rtrace.c,v 2.38 2004/11/05 17:36:56 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 */
#define  MAXTSET        511             /* maximum number in trace set */
OBJECT  traset[MAXTSET+1]={0};          /* trace include/exclude set */

int  hresolu = 0;                       /* horizontal (scan) size */
int  vresolu = 0;                       /* vertical resolution */

double  dstrsrc = 0.0;                  /* square source distribution */
double  shadthresh = .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 = 8;                      /* 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, oputm, oputM;

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
)
{
        long  vcount = hresolu>1 ? hresolu*vresolu : vresolu;
        long  nextflush = hresolu;
        FILE  *fp;
        double  d;
        FVECT  orig, direc;
                                        /* set up input */
        if (fname == NULL)
                fp = stdin;
        else if ((fp = fopen(fname, "r")) == NULL) {
                sprintf(errmsg, "cannot open input file \"%s\"", fname);
                error(SYSTEM, errmsg);
        }
#ifdef _WIN32
        if (inform != 'a')
                SET_FILE_BINARY(fp);
#endif
                                        /* set up output */
        setoutput(outvals);
        switch (outform) {
        case 'a': putreal = puta; break;
        case 'f': putreal = putf; break;
        case 'd': putreal = putd; break;
        case 'c': 
                if (strcmp(outvals, "v"))
                        error(USER, "color format with value output only");
                break;
        default:
                error(CONSISTENCY, "botched output format");
        }
        if (hresolu > 0) {
                if (vresolu > 0)
                        fprtresolu(hresolu, vresolu, stdout);
                fflush(stdout);
        }
                                        /* process file */
        while (getvec(orig, inform, fp) == 0 &&
                        getvec(direc, inform, fp) == 0) {

                d = normalize(direc);
                if (d == 0.0) {                         /* zero ==> flush */
                        bogusray();
                        if (--nextflush <= 0 || vcount <= 0) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                } else {
                        samplendx++;
                                                        /* compute and print */
                        if (imm_irrad)
                                irrad(orig, direc);
                        else
                                rad(orig, direc, lim_dist ? d : 0.0);
                                                        /* flush if time */
                        if (--nextflush == 0) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                }
                if (ferror(stdout))
                        error(SYSTEM, "write error");
                if (--vcount == 0)                      /* check for end */
                        break;
        }
        fflush(stdout);
        if (vcount > 0)
                error(USER, "read error");
        if (fname != NULL)
                fclose(fp);
}


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 */
                        *table = NULL;
                        table = every_out;
                        trace = ourtrace;
                        castonly = 0;
                        break;
                case 'o':                               /* origin */
                        *table++ = oputo;
                        break;
                case 'd':                               /* direction */
                        *table++ = oputd;
                        break;
                case 'v':                               /* value */
                        *table++ = oputv;
                        castonly = 0;
                        break;
                case 'l':                               /* effective distance */
                        *table++ = oputl;
                        castonly = 0;
                        break;
                case 'c':                               /* local coordinates */
                        *table++ = oputc;
                        break;
                case 'L':                               /* single ray length */
                        *table++ = oputL;
                        break;
                case 'p':                               /* point */
                        *table++ = oputp;
                        break;
                case 'n':                               /* perturbed normal */
                        *table++ = oputn;
                        castonly = 0;
                        break;
                case 'N':                               /* unperturbed normal */
                        *table++ = oputN;
                        break;
                case 's':                               /* surface */
                        *table++ = oputs;
                        break;
                case 'w':                               /* weight */
                        *table++ = oputw;
                        break;
                case 'm':                               /* modifier */
                        *table++ = oputm;
                        break;
                case 'M':                               /* material */
                        *table++ = oputM;
                        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;
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        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, NULL, PRIMARY, 1.0);
        if (castonly) {
                if (!localhit(&thisray, &thescene)) {
                        if (thisray.ro == &Aftplane) {  /* clipped */
                                thisray.ro = NULL;
                                thisray.rot = FHUGE;
                        } else
                                sourcehit(&thisray);
                }
        } else
                rayvalue(&thisray);
        printvals(&thisray);
}


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];
        }
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
                                        /* pretend we hit surface */
        thisray.rot = 1.0-1e-4;
        thisray.rod = 1.0;
        VCOPY(thisray.ron, dir);
        for (i = 0; i < 3; i++)         /* fudge factor */
                thisray.rop[i] = org[i] + 1e-4*dir[i];
                                        /* compute and print */
        (*ofun[Lamb.otype].funp)(&Lamb, &thisray);
        printvals(&thisray);
}


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);
        putchar('\n');
}


static void
tabin(                          /* tab in appropriate amount */
        RAY  *r
)
{
        register 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
)
{
        COLR  cout;
        
        if (outform == 'c') {
                setcolr(cout,   colval(r->rcol,RED),
                                colval(r->rcol,GRN),
                                colval(r->rcol,BLU));
                fwrite((char *)cout, sizeof(cout), 1, stdout);
                return;
        }
        (*putreal)(colval(r->rcol,RED));
        (*putreal)(colval(r->rcol,GRN));
        (*putreal)(colval(r->rcol,BLU));
}


static void
oputl(                          /* 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
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
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:	2.39
Committed:	Thu Apr 14 18:04:12 2005 UTC (19 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.38:	+23 -2 lines
Log Message:	Added -oM option to rtrace to output material
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.39	static const char RCSid[] = "$Id: rtrace.c,v 2.38 2004/11/05 17:36:56 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			#define MAXTSET 511 /* maximum number in trace set */
54			OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
55
56	greg	1.1	int hresolu = 0; /* horizontal (scan) size */
57			int vresolu = 0; /* vertical resolution */
58
59			double dstrsrc = 0.0; /* square source distribution */
60	greg	2.35	double shadthresh = .03; /* shadow threshold */
61			double shadcert = .75; /* shadow certainty */
62	greg	2.19	int directrelay = 2; /* number of source relays */
63	greg	1.17	int vspretest = 512; /* virtual source pretest density */
64	greg	2.10	int directvis = 1; /* sources visible? */
65	greg	2.19	double srcsizerat = .2; /* maximum ratio source size/dist. */
66	greg	2.20
67			COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
68	greg	2.22	COLOR salbedo = BLKCOLOR; /* global scattering albedo */
69	greg	2.20	double seccg = 0.; /* global scattering eccentricity */
70			double ssampdist = 0.; /* scatter sampling distance */
71	greg	1.1
72	greg	2.4	double specthresh = .15; /* specular sampling threshold */
73	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
74
75	greg	2.18	int backvis = 1; /* back face visibility */
76
77	greg	2.34	int maxdepth = 8; /* maximum recursion depth */
78			double minweight = 2e-3; /* minimum ray weight */
79	greg	1.1
80	greg	2.27	char ambfile = NULL; / ambient file name */
81	greg	1.1	COLOR ambval = BLKCOLOR; /* ambient value */
82	greg	2.21	int ambvwt = 0; /* initial weight for ambient value */
83	greg	2.36	double ambacc = 0.15; /* ambient accuracy */
84	greg	2.34	int ambres = 256; /* ambient resolution */
85			int ambdiv = 1024; /* ambient divisions */
86			int ambssamp = 512; /* ambient super-samples */
87	greg	1.1	int ambounce = 0; /* ambient bounces */
88	greg	2.38	char amblist[AMBLLEN]; / ambient include/exclude list */
89	greg	1.1	int ambincl = -1; /* include == 1, exclude == 0 */
90
91	schorsch	2.37	static int castonly = 0;
92	gregl	2.25
93	greg	1.1	static RAY thisray; /* for our convenience */
94
95	schorsch	2.37	typedef void putf_t(double v);
96			static putf_t puta, putd, putf;
97	greg	1.1
98	schorsch	2.37	typedef void oputf_t(RAY *r);
99			static oputf_t oputo, oputd, oputv, oputl, oputL, oputc,
100	greg	2.39	oputp, oputn, oputN, oputs, oputw, oputm, oputM;
101	schorsch	2.37
102			static void setoutput(char *vs);
103			static void tranotify(OBJECT obj);
104			static void bogusray(void);
105			static void rad(FVECT org, FVECT dir, double dmax);
106			static void irrad(FVECT org, FVECT dir);
107			static void printvals(RAY *r);
108			static int getvec(FVECT vec, int fmt, FILE *fp);
109			static void tabin(RAY *r);
110			static void ourtrace(RAY *r);
111	greg	1.1
112	schorsch	2.37	static oputf_t ray_out[16], every_out[16];
113			static putf_t *putreal;
114	greg	2.27
115	schorsch	2.37	void (*addobjnotify[])() = {ambnotify, tranotify, NULL};
116	greg	1.1
117
118	greg	2.27	void
119	schorsch	2.37	quit( /* quit program */
120			int code
121			)
122	greg	1.1	{
123	schorsch	2.31	#ifndef NON_POSIX /* XXX we don't clean up elsewhere? */
124	greg	2.11	headclean(); /* delete header file */
125			pfclean(); /* clean up persist files */
126			#endif
127	greg	1.1	exit(code);
128			}
129
130
131	schorsch	2.37	extern char *
132			formstr( /* return format identifier */
133			int f
134			)
135	greg	2.6	{
136			switch (f) {
137			case 'a': return("ascii");
138			case 'f': return("float");
139			case 'd': return("double");
140			case 'c': return(COLRFMT);
141			}
142			return("unknown");
143			}
144
145
146	schorsch	2.37	extern void
147			rtrace( /* trace rays from file */
148			char *fname
149			)
150	greg	1.1	{
151			long vcount = hresolu>1 ? hresolu*vresolu : vresolu;
152			long nextflush = hresolu;
153			FILE *fp;
154	gregl	2.25	double d;
155	greg	1.2	FVECT orig, direc;
156	greg	1.1	/* set up input */
157			if (fname == NULL)
158			fp = stdin;
159			else if ((fp = fopen(fname, "r")) == NULL) {
160			sprintf(errmsg, "cannot open input file \"%s\"", fname);
161			error(SYSTEM, errmsg);
162			}
163	schorsch	2.30	#ifdef _WIN32
164	greg	2.8	if (inform != 'a')
165	schorsch	2.30	SET_FILE_BINARY(fp);
166	greg	2.8	#endif
167	greg	1.1	/* set up output */
168	greg	2.16	setoutput(outvals);
169	greg	1.1	switch (outform) {
170			case 'a': putreal = puta; break;
171			case 'f': putreal = putf; break;
172			case 'd': putreal = putd; break;
173	greg	2.6	case 'c':
174			if (strcmp(outvals, "v"))
175			error(USER, "color format with value output only");
176			break;
177			default:
178			error(CONSISTENCY, "botched output format");
179	greg	1.1	}
180	greg	2.12	if (hresolu > 0) {
181			if (vresolu > 0)
182			fprtresolu(hresolu, vresolu, stdout);
183			fflush(stdout);
184			}
185	greg	1.1	/* process file */
186			while (getvec(orig, inform, fp) == 0 &&
187			getvec(direc, inform, fp) == 0) {
188
189	gregl	2.25	d = normalize(direc);
190			if (d == 0.0) { /* zero ==> flush */
191	gregl	2.24	bogusray();
192	gregl	2.26	if (--nextflush <= 0 \|\| vcount <= 0) {
193	gregl	2.24	fflush(stdout);
194			nextflush = hresolu;
195			}
196			} else {
197			samplendx++;
198	greg	1.1	/* compute and print */
199	gregl	2.24	if (imm_irrad)
200			irrad(orig, direc);
201			else
202	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
203	greg	1.7	/* flush if time */
204	gregl	2.24	if (--nextflush == 0) {
205			fflush(stdout);
206			nextflush = hresolu;
207			}
208	greg	1.1	}
209			if (ferror(stdout))
210			error(SYSTEM, "write error");
211			if (--vcount == 0) /* check for end */
212			break;
213			}
214	greg	2.12	fflush(stdout);
215	greg	1.1	if (vcount > 0)
216			error(USER, "read error");
217	greg	2.12	if (fname != NULL)
218			fclose(fp);
219	greg	1.1	}
220
221
222	schorsch	2.37	static void
223			setoutput( /* set up output tables */
224			register char *vs
225			)
226	greg	1.1	{
227	schorsch	2.37	register oputf_t **table = ray_out;
228	greg	1.1
229	greg	1.11	castonly = 1;
230	greg	1.1	while (*vs)
231			switch (*vs++) {
232			case 't': /* trace */
233			*table = NULL;
234			table = every_out;
235			trace = ourtrace;
236	greg	1.11	castonly = 0;
237	greg	1.1	break;
238			case 'o': /* origin */
239			*table++ = oputo;
240			break;
241			case 'd': /* direction */
242			*table++ = oputd;
243			break;
244			case 'v': /* value */
245			*table++ = oputv;
246	greg	1.11	castonly = 0;
247	greg	1.1	break;
248	greg	2.5	case 'l': /* effective distance */
249	greg	1.1	*table++ = oputl;
250	greg	1.11	castonly = 0;
251	greg	1.1	break;
252	greg	2.29	case 'c': /* local coordinates */
253			*table++ = oputc;
254			break;
255	greg	2.5	case 'L': /* single ray length */
256			*table++ = oputL;
257			break;
258	greg	1.1	case 'p': /* point */
259			*table++ = oputp;
260			break;
261	greg	2.9	case 'n': /* perturbed normal */
262	greg	1.1	*table++ = oputn;
263	greg	2.9	castonly = 0;
264	greg	1.1	break;
265	greg	2.9	case 'N': /* unperturbed normal */
266			*table++ = oputN;
267			break;
268	greg	1.1	case 's': /* surface */
269			*table++ = oputs;
270			break;
271			case 'w': /* weight */
272			*table++ = oputw;
273			break;
274			case 'm': /* modifier */
275			*table++ = oputm;
276			break;
277	greg	2.39	case 'M': /* material */
278			*table++ = oputM;
279			break;
280	greg	1.1	}
281			*table = NULL;
282	gregl	2.24	}
283
284
285	schorsch	2.37	static void
286			bogusray(void) /* print out empty record */
287	gregl	2.24	{
288			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
289			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
290			rayorigin(&thisray, NULL, PRIMARY, 1.0);
291			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	1.1	rayorigin(&thisray, NULL, PRIMARY, 1.0);
306	gregl	2.25	if (castonly) {
307	schorsch	2.33	if (!localhit(&thisray, &thescene)) {
308	gregl	2.25	if (thisray.ro == &Aftplane) { /* clipped */
309			thisray.ro = NULL;
310			thisray.rot = FHUGE;
311			} else
312			sourcehit(&thisray);
313	schorsch	2.33	}
314	gregl	2.25	} else
315	greg	1.11	rayvalue(&thisray);
316	greg	2.16	printvals(&thisray);
317	greg	1.1	}
318
319
320	schorsch	2.37	static void
321			irrad( /* compute immediate irradiance value */
322			FVECT org,
323			FVECT dir
324			)
325	greg	1.1	{
326			register int i;
327
328			for (i = 0; i < 3; i++) {
329			thisray.rorg[i] = org[i] + dir[i];
330			thisray.rdir[i] = -dir[i];
331			}
332			rayorigin(&thisray, NULL, PRIMARY, 1.0);
333			/* pretend we hit surface */
334	greg	2.16	thisray.rot = 1.0-1e-4;
335	greg	1.1	thisray.rod = 1.0;
336			VCOPY(thisray.ron, dir);
337			for (i = 0; i < 3; i++) /* fudge factor */
338			thisray.rop[i] = org[i] + 1e-4*dir[i];
339			/* compute and print */
340			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
341	greg	2.16	printvals(&thisray);
342			}
343
344
345	schorsch	2.37	static void
346			printvals( /* print requested ray values */
347			RAY *r
348			)
349	greg	2.16	{
350	schorsch	2.37	register oputf_t **tp;
351	greg	2.16
352			if (ray_out[0] == NULL)
353			return;
354			for (tp = ray_out; *tp != NULL; tp++)
355			(**tp)(r);
356	greg	1.1	if (outform == 'a')
357			putchar('\n');
358			}
359
360
361	schorsch	2.37	static int
362			getvec( /* get a vector from fp */
363			register FVECT vec,
364			int fmt,
365			FILE *fp
366			)
367	greg	1.1	{
368			static float vf[3];
369	greg	2.5	static double vd[3];
370	greg	1.19	char buf[32];
371			register int i;
372	greg	1.1
373			switch (fmt) {
374			case 'a': /* ascii */
375	greg	1.19	for (i = 0; i < 3; i++) {
376			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
377			!isflt(buf))
378			return(-1);
379			vec[i] = atof(buf);
380			}
381	greg	1.1	break;
382			case 'f': /* binary float */
383	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
384	greg	1.1	return(-1);
385			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
386			break;
387			case 'd': /* binary double */
388	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
389	greg	1.1	return(-1);
390	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
391	greg	1.1	break;
392	greg	2.6	default:
393			error(CONSISTENCY, "botched input format");
394	greg	1.1	}
395			return(0);
396			}
397
398
399	schorsch	2.37	static void
400			tranotify( /* record new modifier */
401			OBJECT obj
402			)
403	greg	2.15	{
404			static int hitlimit = 0;
405			register OBJREC *o = objptr(obj);
406			register char **tralp;
407
408	greg	2.27	if (obj == OVOID) { /* starting over */
409			traset[0] = 0;
410			hitlimit = 0;
411			return;
412			}
413	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
414			return;
415			for (tralp = tralist; *tralp != NULL; tralp++)
416			if (!strcmp(o->oname, *tralp)) {
417			if (traset[0] >= MAXTSET) {
418			error(WARNING, "too many modifiers in trace list");
419			hitlimit++;
420			return; /* should this be fatal? */
421			}
422			insertelem(traset, obj);
423			return;
424			}
425			}
426
427
428	greg	2.27	static void
429	schorsch	2.37	ourtrace( /* print ray values */
430			RAY *r
431			)
432	greg	1.1	{
433	schorsch	2.37	register oputf_t **tp;
434	greg	1.1
435			if (every_out[0] == NULL)
436	greg	2.15	return;
437	greg	2.16	if (r->ro == NULL) {
438			if (traincl == 1)
439			return;
440			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
441	greg	1.1	return;
442			tabin(r);
443			for (tp = every_out; *tp != NULL; tp++)
444			(**tp)(r);
445			putchar('\n');
446			}
447
448
449	greg	2.27	static void
450	schorsch	2.37	tabin( /* tab in appropriate amount */
451			RAY *r
452			)
453	greg	1.1	{
454			register RAY *rp;
455
456			for (rp = r->parent; rp != NULL; rp = rp->parent)
457			putchar('\t');
458			}
459
460
461	greg	2.27	static void
462	schorsch	2.37	oputo( /* print origin */
463			RAY *r
464			)
465	greg	1.1	{
466			(*putreal)(r->rorg[0]);
467			(*putreal)(r->rorg[1]);
468			(*putreal)(r->rorg[2]);
469			}
470
471
472	greg	2.27	static void
473	schorsch	2.37	oputd( /* print direction */
474			RAY *r
475			)
476	greg	1.1	{
477			(*putreal)(r->rdir[0]);
478			(*putreal)(r->rdir[1]);
479			(*putreal)(r->rdir[2]);
480			}
481
482
483	greg	2.27	static void
484	schorsch	2.37	oputv( /* print value */
485			RAY *r
486			)
487	greg	1.1	{
488	greg	2.6	COLR cout;
489
490			if (outform == 'c') {
491			setcolr(cout, colval(r->rcol,RED),
492			colval(r->rcol,GRN),
493			colval(r->rcol,BLU));
494			fwrite((char *)cout, sizeof(cout), 1, stdout);
495			return;
496			}
497	greg	1.1	(*putreal)(colval(r->rcol,RED));
498			(*putreal)(colval(r->rcol,GRN));
499			(*putreal)(colval(r->rcol,BLU));
500			}
501
502
503	greg	2.27	static void
504	schorsch	2.37	oputl( /* print effective distance */
505			RAY *r
506			)
507	greg	1.1	{
508	greg	1.9	(*putreal)(r->rt);
509	greg	2.5	}
510
511
512	greg	2.27	static void
513	schorsch	2.37	oputL( /* print single ray length */
514			RAY *r
515			)
516	greg	2.5	{
517			(*putreal)(r->rot);
518	greg	1.1	}
519
520
521	greg	2.27	static void
522	schorsch	2.37	oputc( /* print local coordinates */
523			RAY *r
524			)
525	greg	2.29	{
526			(*putreal)(r->uv[0]);
527			(*putreal)(r->uv[1]);
528			}
529
530
531			static void
532	schorsch	2.37	oputp( /* print point */
533			RAY *r
534			)
535	greg	1.1	{
536			if (r->rot < FHUGE) {
537			(*putreal)(r->rop[0]);
538			(*putreal)(r->rop[1]);
539			(*putreal)(r->rop[2]);
540			} else {
541			(*putreal)(0.0);
542			(*putreal)(0.0);
543			(*putreal)(0.0);
544			}
545			}
546
547
548	greg	2.27	static void
549	schorsch	2.37	oputN( /* print unperturbed normal */
550			RAY *r
551			)
552	greg	1.1	{
553			if (r->rot < FHUGE) {
554			(*putreal)(r->ron[0]);
555			(*putreal)(r->ron[1]);
556			(*putreal)(r->ron[2]);
557			} else {
558			(*putreal)(0.0);
559			(*putreal)(0.0);
560			(*putreal)(0.0);
561			}
562	greg	2.9	}
563
564
565	greg	2.27	static void
566	schorsch	2.37	oputn( /* print perturbed normal */
567			RAY *r
568			)
569	greg	2.9	{
570			FVECT pnorm;
571
572			if (r->rot >= FHUGE) {
573			(*putreal)(0.0);
574			(*putreal)(0.0);
575			(*putreal)(0.0);
576			return;
577			}
578			raynormal(pnorm, r);
579			(*putreal)(pnorm[0]);
580			(*putreal)(pnorm[1]);
581			(*putreal)(pnorm[2]);
582	greg	1.1	}
583
584
585	greg	2.27	static void
586	schorsch	2.37	oputs( /* print name */
587			RAY *r
588			)
589	greg	1.1	{
590			if (r->ro != NULL)
591			fputs(r->ro->oname, stdout);
592			else
593			putchar('*');
594			putchar('\t');
595			}
596
597
598	greg	2.27	static void
599	schorsch	2.37	oputw( /* print weight */
600			RAY *r
601			)
602	greg	1.1	{
603			(*putreal)(r->rweight);
604			}
605
606
607	greg	2.27	static void
608	schorsch	2.37	oputm( /* print modifier */
609			RAY *r
610			)
611	greg	1.1	{
612			if (r->ro != NULL)
613	greg	2.23	if (r->ro->omod != OVOID)
614			fputs(objptr(r->ro->omod)->oname, stdout);
615			else
616			fputs(VOIDID, stdout);
617	greg	1.1	else
618			putchar('*');
619			putchar('\t');
620			}
621
622
623	greg	2.27	static void
624	greg	2.39	oputM( /* print material */
625			RAY *r
626			)
627			{
628			OBJREC *mat;
629
630			if (r->ro != NULL) {
631			if ((mat = findmaterial(r->ro)) != NULL)
632			fputs(mat->oname, stdout);
633			else
634			fputs(VOIDID, stdout);
635			} else
636			putchar('*');
637			putchar('\t');
638			}
639
640
641			static void
642	schorsch	2.37	puta( /* print ascii value */
643			double v
644			)
645	greg	1.1	{
646			printf("%e\t", v);
647			}
648
649
650	greg	2.27	static void
651	greg	1.1	putd(v) /* print binary double */
652			double v;
653			{
654	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
655	greg	1.1	}
656
657
658	greg	2.27	static void
659	greg	1.1	putf(v) /* print binary float */
660			double v;
661			{
662			float f = v;
663
664	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
665	greg	1.1	}