src/rt/rv2.c

#ifndef lint
static const char       RCSid[] = "$Id: rv2.c,v 2.43 2004/03/30 16:13:01 schorsch Exp $";
#endif
/*
 *  rv2.c - command routines used in tracing a view.
 *
 *  External symbols declared in rpaint.h
 */

#include "copyright.h"

#include  <ctype.h>
#include  <string.h>

#include  "platform.h"
#include  "ray.h"
#include  "ambient.h"
#include  "otypes.h"
#include  "rpaint.h"

extern int  psample;                    /* pixel sample size */
extern double  maxdiff;                 /* max. sample difference */

#define  CTRL(c)        ((c)-'@')

#ifdef  SMLFLT
#define  sscanvec(s,v)  (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
#else
#define  sscanvec(s,v)  (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
#endif

extern char  rifname[128];              /* rad input file name */

extern char  *progname;
extern char  *octname;


extern void
getframe(                               /* get a new frame */
        char  *s
)
{
        if (getrect(s, &pframe) < 0)
                return;
        pdepth = 0;
}


extern void
getrepaint(                             /* get area and repaint */
        char  *s
)
{
        RECT  box;

        if (getrect(s, &box) < 0)
                return;
        paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
}


extern void
getview(                                /* get/show view parameters */
        char  *s
)
{
        FILE  *fp;
        char  buf[128];
        char  *fname;
        int  change = 0;
        VIEW  nv = ourview;

        while (isspace(*s))
                s++;
        if (*s == '-') {                        /* command line parameters */
                if (sscanview(&nv, s))
                        newview(&nv);
                else
                        error(COMMAND, "bad view option(s)");
                return;
        }
        if (sscanf(s, "%s", buf) == 1) {        /* write parameters to a file */
                if ((fname = getpath(buf, NULL, 0)) == NULL ||
                                (fp = fopen(fname, "a")) == NULL) {
                        sprintf(errmsg, "cannot open \"%s\"", buf);
                        error(COMMAND, errmsg);
                        return;
                }
                fputs(progname, fp);
                fprintview(&ourview, fp);
                fputs(sskip(s), fp);
                putc('\n', fp);
                fclose(fp);
                return;
        }
        sprintf(buf, "view type (%c): ", ourview.type);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (buf[0] && buf[0] != ourview.type) {
                nv.type = buf[0];
                change++;
        }
        sprintf(buf, "view point (%.6g %.6g %.6g): ",
                        ourview.vp[0], ourview.vp[1], ourview.vp[2]);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (sscanvec(buf, nv.vp))
                change++;
        sprintf(buf, "view direction (%.6g %.6g %.6g): ",
                        ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (sscanvec(buf, nv.vdir))
                change++;
        sprintf(buf, "view up (%.6g %.6g %.6g): ",
                        ourview.vup[0], ourview.vup[1], ourview.vup[2]);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (sscanvec(buf, nv.vup))
                change++;
        sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
                        ourview.horiz, ourview.vert);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
                change++;
        sprintf(buf, "fore and aft clipping plane (%.6g %.6g): ",
                        ourview.vfore, ourview.vaft);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (sscanf(buf, "%lf %lf", &nv.vfore, &nv.vaft) == 2)
                change++;
        sprintf(buf, "view shift and lift (%.6g %.6g): ",
                        ourview.hoff, ourview.voff);
        (*dev->comout)(buf);
        (*dev->comin)(buf, NULL);
        if (buf[0] == CTRL('C')) return;
        if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
                change++;
        if (change)
                newview(&nv);
}


extern void
lastview(                               /* return to a previous view */
        char  *s
)
{
        char  buf[128];
        char  *fname;
        int  success;
        VIEW  nv;

        if (sscanf(s, "%s", buf) == 1) {        /* get parameters from a file */
                nv = stdview;
                if ((fname = getpath(buf, "", R_OK)) == NULL ||
                                (success = viewfile(fname, &nv, NULL)) == -1) {
                        sprintf(errmsg, "cannot open \"%s\"", buf);
                        error(COMMAND, errmsg);
                        return;
                }
                if (!success)
                        error(COMMAND, "wrong file format");
                else
                        newview(&nv);
                return;
        }
        if (oldview.type == 0) {        /* no old view! */
                error(COMMAND, "no previous view");
                return;
        }
        nv = ourview;
        ourview = oldview;
        oldview = nv;
        newimage();
}


extern void
saveview(                               /* save view to rad file */
        char  *s
)
{
        char  view[64];
        char  *fname;
        FILE  *fp;

        if (*atos(view, sizeof(view), s)) {
                if (isint(view)) {
                        error(COMMAND, "cannot write view by number");
                        return;
                }
                s = sskip(s);
        }
        while (isspace(*s))
                s++;
        if (*s)
                atos(rifname, sizeof(rifname), s);
        else if (rifname[0] == '\0') {
                error(COMMAND, "no previous rad file");
                return;
        }
        if ((fname = getpath(rifname, NULL, 0)) == NULL ||
                        (fp = fopen(fname, "a")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\"", rifname);
                error(COMMAND, errmsg);
                return;
        }
        fputs("view= ", fp);
        fputs(view, fp);
        fprintview(&ourview, fp);
        putc('\n', fp);
        fclose(fp);
}


extern void
loadview(                               /* load view from rad file */
        char  *s
)
{
        char  buf[512];
        char  *fname;
        FILE  *fp;
        VIEW  nv;

        strcpy(buf, "rad -n -s -V -v ");
        if (sscanf(s, "%s", buf+strlen(buf)) == 1)
                s = sskip(s);
        else
                strcat(buf, "1");
        if (*s)
                atos(rifname, sizeof(rifname), s);
        else if (rifname[0] == '\0') {
                error(COMMAND, "no previous rad file");
                return;
        }
        if ((fname = getpath(rifname, "", R_OK)) == NULL) {
                sprintf(errmsg, "cannot access \"%s\"", rifname);
                error(COMMAND, errmsg);
                return;
        }
        sprintf(buf+strlen(buf), " %s", fname);
        if ((fp = popen(buf, "r")) == NULL) {
                error(COMMAND, "cannot run rad");
                return;
        }
        buf[0] = '\0';
        fgets(buf, sizeof(buf), fp);
        pclose(fp);
        nv = stdview;
        if (!sscanview(&nv, buf)) {
                error(COMMAND, "rad error -- no such view?");
                return;
        }
        newview(&nv);
}


extern void
getaim(                         /* aim camera */
        char  *s
)
{
        VIEW  nv = ourview;
        double  zfact;

        if (getinterest(s, 1, nv.vdir, &zfact) < 0)
                return;
        zoomview(&nv, zfact);
        newview(&nv);
}


extern void
getmove(                                /* move camera */
        char  *s
)
{
        FVECT  vc;
        double  mag;

        if (getinterest(s, 0, vc, &mag) < 0)
                return;
        moveview(0.0, 0.0, mag, vc);
}


extern void
getrotate(                              /* rotate camera */
        char  *s
)
{
        VIEW  nv = ourview;
        FVECT  v1;
        double  angle, elev, zfact;
        
        elev = 0.0; zfact = 1.0;
        if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) {
                error(COMMAND, "missing angle");
                return;
        }
        spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
        if (elev != 0.0) {
                fcross(v1, nv.vdir, ourview.vup);
                normalize(v1);
                spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
        }
        zoomview(&nv, zfact);
        newview(&nv);
}


extern void
getpivot(                               /* pivot viewpoint */
        register char  *s
)
{
        FVECT  vc;
        double  angle, elev, mag;

        elev = 0.0;
        if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
                error(COMMAND, "missing angle");
                return;
        }
        if (getinterest(sskip2(s,2), 0, vc, &mag) < 0)
                return;
        moveview(angle, elev, mag, vc);
}


extern void
getexposure(                            /* get new exposure */
        char  *s
)
{
        char  buf[128];
        register char  *cp;
        RECT  r;
        int  x, y;
        register PNODE  *p = &ptrunk;
        int  adapt = 0;
        double  e = 1.0;

        for (cp = s; isspace(*cp); cp++)
                ;
        if (*cp == '@') {
                adapt++;
                while (isspace(*++cp))
                        ;
        }
        if (*cp == '\0') {              /* normalize to point */
                if (dev->getcur == NULL)
                        return;
                (*dev->comout)("Pick point for exposure\n");
                if ((*dev->getcur)(&x, &y) == ABORT)
                        return;
                r.l = r.d = 0;
                r.r = hresolu; r.u = vresolu;
                p = findrect(x, y, &ptrunk, &r, -1);
        } else {
                if (*cp == '=') {       /* absolute setting */
                        p = NULL;
                        e = 1.0/exposure;
                        for (cp++; isspace(*cp); cp++)
                                ;
                        if (*cp == '\0') {      /* interactive */
                                sprintf(buf, "exposure (%f): ", exposure);
                                (*dev->comout)(buf);
                                (*dev->comin)(buf, NULL);
                                for (cp = buf; isspace(*cp); cp++)
                                        ;
                                if (*cp == '\0')
                                        return;
                        }
                }
                if (*cp == '+' || *cp == '-')   /* f-stops */
                        e *= pow(2.0, atof(cp));
                else                            /* multiplier */
                        e *= atof(cp);
        }
        if (p != NULL) {                /* relative setting */
                if (bright(p->v) < 1e-15) {
                        error(COMMAND, "cannot normalize to zero");
                        return;
                }
                if (adapt)
                        e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure;
                else
                        e *= 0.5 / bright(p->v);
        }
        if (e <= FTINY || fabs(1.0 - e) <= FTINY)
                return;
        scalepict(&ptrunk, e);
        exposure *= e;
        redraw();
}

typedef union {int i; double d; COLOR C;}       *MyUptr;

extern int
getparam(               /* get variable from user */
        char  *str,
        char  *dsc,
        int  typ,
        void  *p
)
{
        register MyUptr  ptr = (MyUptr)p;
        int  i0;
        double  d0, d1, d2;
        char  buf[48];

        switch (typ) {
        case 'i':                       /* integer */
                if (sscanf(str, "%d", &i0) != 1) {
                        (*dev->comout)(dsc);
                        sprintf(buf, " (%d): ", ptr->i);
                        (*dev->comout)(buf);
                        (*dev->comin)(buf, NULL);
                        if (sscanf(buf, "%d", &i0) != 1)
                                return(0);
                }
                ptr->i = i0;
                return(1);
        case 'r':                       /* real */
                if (sscanf(str, "%lf", &d0) != 1) {
                        (*dev->comout)(dsc);
                        sprintf(buf, " (%.6g): ", ptr->d);
                        (*dev->comout)(buf);
                        (*dev->comin)(buf, NULL);
                        if (sscanf(buf, "%lf", &d0) != 1)
                                return(0);
                }
                ptr->d = d0;
                return(1);
        case 'b':                       /* boolean */
                if (sscanf(str, "%1s", buf) != 1) {
                        (*dev->comout)(dsc);
                        sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n');
                        (*dev->comout)(buf);
                        (*dev->comin)(buf, NULL);
                        if (buf[0] == '\0' ||
                                        strchr("yY+1tTnN-0fF", buf[0]) == NULL)
                                return(0);
                }
                ptr->i = strchr("yY+1tT", buf[0]) != NULL;
                return(1);
        case 'C':                       /* color */
                if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
                        (*dev->comout)(dsc);
                        sprintf(buf, " (%.6g %.6g %.6g): ",
                                        colval(ptr->C,RED),
                                        colval(ptr->C,GRN),
                                        colval(ptr->C,BLU));
                        (*dev->comout)(buf);
                        (*dev->comin)(buf, NULL);
                        if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
                                return(0);
                }
                setcolor(ptr->C, d0, d1, d2);
                return(1);
        }
        return 0; /* nothing matched */
}


extern void
setparam(                               /* get/set program parameter */
        register char  *s
)
{
        char  buf[128];
        
        if (s[0] == '\0') {
                (*dev->comout)(
                "aa ab ad ar as av aw b dc dv dj ds dt i lr lw me ma mg ms ps pt sj st bv: ");
                (*dev->comin)(buf, NULL);
                s = buf;
        }
        switch (s[0]) {
        case 'l':                       /* limit */
                switch (s[1]) {
                case 'w':                       /* weight */
                        getparam(s+2, "limit weight", 'r',
                                        (void *)&minweight);
                        break;
                case 'r':                       /* reflection */
                        getparam(s+2, "limit reflection", 'i',
                                        (void *)&maxdepth);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'd':                       /* direct */
                switch (s[1]) {
                case 'j':                       /* jitter */
                        getparam(s+2, "direct jitter", 'r',
                                        (void *)&dstrsrc);
                        break;
                case 'c':                       /* certainty */
                        getparam(s+2, "direct certainty", 'r',
                                        (void *)&shadcert);
                        break;
                case 't':                       /* threshold */
                        getparam(s+2, "direct threshold", 'r',
                                        (void *)&shadthresh);
                        break;
                case 'v':                       /* visibility */
                        getparam(s+2, "direct visibility", 'b',
                                        (void *)&directvis);
                        break;
                case 's':                       /* sampling */
                        getparam(s+2, "direct sampling", 'r',
                                        (void *)&srcsizerat);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'b':                       /* back faces or black and white */
                switch (s[1]) {
                case 'v':                       /* back face visibility */
                        getparam(s+2, "back face visibility", 'b',
                                        (void *)&backvis);
                        break;
                case '\0':                      /* black and white */
                case ' ':
                case 'y': case 'Y': case 't': case 'T': case '1': case '+':
                case 'n': case 'N': case 'f': case 'F': case '0': case '-':
                        getparam(s+1, "black and white", 'b',
                                        (void *)&greyscale);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'i':                       /* irradiance */
                getparam(s+1, "irradiance", 'b',
                                (void *)&do_irrad);
                break;
        case 'a':                       /* ambient */
                switch (s[1]) {
                case 'v':                       /* value */
                        getparam(s+2, "ambient value", 'C',
                                        (void *)ambval);
                        break;
                case 'w':                       /* weight */
                        getparam(s+2, "ambient value weight", 'i',
                                        (void *)&ambvwt);
                        break;
                case 'a':                       /* accuracy */
                        if (getparam(s+2, "ambient accuracy", 'r',
                                        (void *)&ambacc))
                                setambacc(ambacc);
                        break;
                case 'd':                       /* divisions */
                        getparam(s+2, "ambient divisions", 'i',
                                        (void *)&ambdiv);
                        break;
                case 's':                       /* samples */
                        getparam(s+2, "ambient super-samples", 'i',
                                        (void *)&ambssamp);
                        break;
                case 'b':                       /* bounces */
                        getparam(s+2, "ambient bounces", 'i',
                                        (void *)&ambounce);
                        break;
                case 'r':
                        if (getparam(s+2, "ambient resolution", 'i',
                                        (void *)&ambres))
                                setambres(ambres);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'm':                       /* medium */
                switch (s[1]) {
                case 'e':                       /* extinction coefficient */
                        getparam(s+2, "extinction coefficient", 'C',
                                        (void *)cextinction);
                        break;
                case 'a':                       /* scattering albedo */
                        getparam(s+2, "scattering albedo", 'C',
                                        (void *)salbedo);
                        break;
                case 'g':                       /* scattering eccentricity */
                        getparam(s+2, "scattering eccentricity", 'r',
                                        (void *)&seccg);
                        break;
                case 's':                       /* sampling distance */
                        getparam(s+2, "mist sampling distance", 'r',
                                        (void *)&ssampdist);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'p':                       /* pixel */
                switch (s[1]) {
                case 's':                       /* sample */
                        if (getparam(s+2, "pixel sample", 'i',
                                        (void *)&psample))
                                pdepth = 0;
                        break;
                case 't':                       /* threshold */
                        if (getparam(s+2, "pixel threshold", 'r',
                                        (void *)&maxdiff))
                                pdepth = 0;
                        break;
                default:
                        goto badparam;
                }
                break;
        case 's':                       /* specular */
                switch (s[1]) {
                case 'j':                       /* jitter */
                        getparam(s+2, "specular jitter", 'r',
                                        (void *)&specjitter);
                        break;
                case 't':                       /* threshold */
                        getparam(s+2, "specular threshold", 'r',
                                        (void *)&specthresh);
                        break;
                default:
                        goto badparam;
                }
                break;
        case '\0':                      /* nothing */
                break;
        default:;
badparam:
                *sskip(s) = '\0';
                sprintf(errmsg, "%s: unknown variable", s);
                error(COMMAND, errmsg);
                break;
        }
}


extern void
traceray(s)                             /* trace a single ray */
char  *s;
{
        char  buf[128];
        int  x, y;
        OBJREC  *ino;
        RAY  thisray;

        thisray.rmax = 0.0;

        if (!sscanvec(s, thisray.rorg) ||
                        !sscanvec(sskip2(s,3), thisray.rdir)) {

                if (dev->getcur == NULL)
                        return;
                (*dev->comout)("Pick ray\n");
                if ((*dev->getcur)(&x, &y) == ABORT)
                        return;

                if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
                        &ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
                        error(COMMAND, "not on image");
                        return;
                }

        } else if (normalize(thisray.rdir) == 0.0) {
                error(COMMAND, "zero ray direction");
                return;
        }

        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        
        rayvalue(&thisray);

        if (thisray.ro == NULL)
                (*dev->comout)("ray hit nothing");
        else {
                sprintf(buf, "ray hit %s%s %s \"%s\"",
                                thisray.rod < 0.0 ? "back of " : "",
                                thisray.ro->omod == OVOID ? VOIDID :
                                        objptr(thisray.ro->omod)->oname,
                                ofun[thisray.ro->otype].funame,
                                thisray.ro->oname);
                if ((ino = objptr(thisray.robj)) != thisray.ro)
                        sprintf(buf+strlen(buf), " in %s \"%s\"",
                                        ofun[ino->otype].funame, ino->oname);
                (*dev->comout)(buf);
                (*dev->comin)(buf, NULL);
                if (thisray.rot >= FHUGE)
                        (*dev->comout)("at infinity");
                else {
                        sprintf(buf, "at (%.6g %.6g %.6g) (%.6g)",
                                        thisray.rop[0], thisray.rop[1],
                                        thisray.rop[2], thisray.rt);
                        (*dev->comout)(buf);
                }
                (*dev->comin)(buf, NULL);
                sprintf(buf, "value (%.5g %.5g %.5g) (%.3gL)",
                                colval(thisray.rcol,RED),
                                colval(thisray.rcol,GRN),
                                colval(thisray.rcol,BLU),
                                luminance(thisray.rcol));
                (*dev->comout)(buf);
        }
        (*dev->comin)(buf, NULL);
}


extern void
writepict(s)                            /* write the picture to a file */
char  *s;
{
        static char  buf[128];
        char  *fname;
        FILE  *fp;
        COLR  *scanline;
        int  y;

        while (isspace(*s))
                s++;
        if (*s)
                atos(buf, sizeof(buf), s);
        else if (buf[0] == '\0') {
                error(COMMAND, "no file");
                return;
        }
        if ((fname = getpath(buf, NULL, 0)) == NULL ||
                        (fp = fopen(fname, "w")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\"", buf);
                error(COMMAND, errmsg);
                return;
        }
        SET_FILE_BINARY(fp);
        (*dev->comout)("writing \"");
        (*dev->comout)(fname);
        (*dev->comout)("\"...\n");
                                                /* write header */
        newheader("RADIANCE", fp);
        fputs(progname, fp);
        fprintview(&ourview, fp);
        if (octname != NULL)
                fprintf(fp, " %s\n", octname);
        else
                putc('\n', fp);
        fprintf(fp, "SOFTWARE= %s\n", VersionID);
        fputnow(fp);
        if (exposure != 1.0)
                fputexpos(exposure, fp);
        if (dev->pixaspect != 1.0)
                fputaspect(dev->pixaspect, fp);
        fputformat(COLRFMT, fp);
        putc('\n', fp);
        fprtresolu(hresolu, vresolu, fp);

        scanline = (COLR *)malloc(hresolu*sizeof(COLR));
        if (scanline == NULL) {
                error(COMMAND, "not enough memory!");
                fclose(fp);
                unlink(fname);
                return;
        }
        for (y = vresolu-1; y >= 0; y--) {
                getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
                if (fwritecolrs(scanline, hresolu, fp) < 0)
                        break;
        }
        free((void *)scanline);
        if (fclose(fp) < 0)
                error(COMMAND, "write error");
}
Revision:	2.44
Committed:	Tue Jan 18 00:33:16 2005 UTC (19 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.43:	+5 -34 lines
Log Message:	Added -pd option for depth-of-field sampling and -vd focal distance entry
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.44	static const char RCSid[] = "$Id: rv2.c,v 2.43 2004/03/30 16:13:01 schorsch Exp $";
3	greg	1.1	#endif
4			/*
5			* rv2.c - command routines used in tracing a view.
6			*
7	greg	2.38	* External symbols declared in rpaint.h
8			*/
9
10	schorsch	2.41	#include "copyright.h"
11
12	schorsch	2.40	#include <ctype.h>
13	schorsch	2.41	#include <string.h>
14	greg	1.1
15	schorsch	2.40	#include "platform.h"
16	greg	1.1	#include "ray.h"
17	schorsch	2.43	#include "ambient.h"
18	greg	1.1	#include "otypes.h"
19			#include "rpaint.h"
20
21	greg	2.38	extern int psample; /* pixel sample size */
22			extern double maxdiff; /* max. sample difference */
23	greg	1.1
24	greg	2.4	#define CTRL(c) ((c)-'@')
25	greg	1.1
26	greg	2.6	#ifdef SMLFLT
27			#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
28			#else
29			#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
30			#endif
31
32	greg	2.20	extern char rifname[128]; /* rad input file name */
33	greg	2.18
34	greg	1.1	extern char *progname;
35	greg	1.29	extern char *octname;
36	greg	1.1
37
38	schorsch	2.43	extern void
39			getframe( /* get a new frame */
40			char *s
41			)
42	greg	1.1	{
43	greg	1.12	if (getrect(s, &pframe) < 0)
44	greg	1.1	return;
45			pdepth = 0;
46			}
47
48
49	schorsch	2.43	extern void
50			getrepaint( /* get area and repaint */
51			char *s
52			)
53	greg	1.12	{
54			RECT box;
55
56			if (getrect(s, &box) < 0)
57			return;
58	greg	1.14	paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
59	greg	1.12	}
60
61
62	schorsch	2.43	extern void
63			getview( /* get/show view parameters */
64			char *s
65			)
66	greg	1.1	{
67			FILE *fp;
68			char buf[128];
69	greg	1.10	char *fname;
70	greg	1.3	int change = 0;
71	greg	2.44	VIEW nv = ourview;
72	greg	1.1
73	greg	2.9	while (isspace(*s))
74			s++;
75			if (s == '-') { / command line parameters */
76			if (sscanview(&nv, s))
77			newview(&nv);
78			else
79			error(COMMAND, "bad view option(s)");
80			return;
81			}
82	greg	1.1	if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */
83	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
84	greg	1.1	(fp = fopen(fname, "a")) == NULL) {
85			sprintf(errmsg, "cannot open \"%s\"", buf);
86			error(COMMAND, errmsg);
87			return;
88			}
89	greg	1.2	fputs(progname, fp);
90	greg	1.1	fprintview(&ourview, fp);
91	greg	1.19	fputs(sskip(s), fp);
92	greg	2.18	putc('\n', fp);
93	greg	1.1	fclose(fp);
94			return;
95			}
96			sprintf(buf, "view type (%c): ", ourview.type);
97			(*dev->comout)(buf);
98	greg	1.18	(*dev->comin)(buf, NULL);
99	greg	2.4	if (buf[0] == CTRL('C')) return;
100	greg	1.3	if (buf[0] && buf[0] != ourview.type) {
101	greg	1.1	nv.type = buf[0];
102	greg	1.3	change++;
103	greg	2.44	}
104	greg	1.1	sprintf(buf, "view point (%.6g %.6g %.6g): ",
105			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
106			(*dev->comout)(buf);
107	greg	1.18	(*dev->comin)(buf, NULL);
108	greg	2.4	if (buf[0] == CTRL('C')) return;
109	greg	2.6	if (sscanvec(buf, nv.vp))
110	greg	1.3	change++;
111	greg	1.1	sprintf(buf, "view direction (%.6g %.6g %.6g): ",
112			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
113			(*dev->comout)(buf);
114	greg	1.18	(*dev->comin)(buf, NULL);
115	greg	2.4	if (buf[0] == CTRL('C')) return;
116	greg	2.6	if (sscanvec(buf, nv.vdir))
117	greg	1.3	change++;
118	greg	1.1	sprintf(buf, "view up (%.6g %.6g %.6g): ",
119			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
120			(*dev->comout)(buf);
121	greg	1.18	(*dev->comin)(buf, NULL);
122	greg	2.4	if (buf[0] == CTRL('C')) return;
123	greg	2.6	if (sscanvec(buf, nv.vup))
124	greg	1.3	change++;
125	greg	1.1	sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
126			ourview.horiz, ourview.vert);
127			(*dev->comout)(buf);
128	greg	1.18	(*dev->comin)(buf, NULL);
129	greg	2.4	if (buf[0] == CTRL('C')) return;
130	greg	1.3	if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
131			change++;
132	greg	2.26	sprintf(buf, "fore and aft clipping plane (%.6g %.6g): ",
133			ourview.vfore, ourview.vaft);
134			(*dev->comout)(buf);
135			(*dev->comin)(buf, NULL);
136			if (buf[0] == CTRL('C')) return;
137			if (sscanf(buf, "%lf %lf", &nv.vfore, &nv.vaft) == 2)
138			change++;
139	greg	1.14	sprintf(buf, "view shift and lift (%.6g %.6g): ",
140			ourview.hoff, ourview.voff);
141	greg	1.1	(*dev->comout)(buf);
142	greg	1.18	(*dev->comin)(buf, NULL);
143	greg	2.4	if (buf[0] == CTRL('C')) return;
144	greg	1.14	if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
145	greg	1.3	change++;
146			if (change)
147			newview(&nv);
148	greg	1.1	}
149
150
151	schorsch	2.43	extern void
152			lastview( /* return to a previous view */
153			char *s
154			)
155	greg	1.1	{
156			char buf[128];
157	greg	1.10	char *fname;
158	greg	1.1	int success;
159			VIEW nv;
160
161			if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */
162	schorsch	2.42	nv = stdview;
163	greg	2.19	if ((fname = getpath(buf, "", R_OK)) == NULL \|\|
164	greg	1.33	(success = viewfile(fname, &nv, NULL)) == -1) {
165	greg	1.1	sprintf(errmsg, "cannot open \"%s\"", buf);
166			error(COMMAND, errmsg);
167			return;
168			}
169			if (!success)
170			error(COMMAND, "wrong file format");
171			else
172			newview(&nv);
173			return;
174			}
175	greg	1.20	if (oldview.type == 0) { /* no old view! */
176	greg	1.1	error(COMMAND, "no previous view");
177			return;
178			}
179	schorsch	2.42	nv = ourview;
180			ourview = oldview;
181			oldview = nv;
182	greg	1.1	newimage();
183	greg	2.18	}
184
185
186	schorsch	2.43	extern void
187			saveview( /* save view to rad file */
188			char *s
189			)
190	greg	2.18	{
191			char view[64];
192			char *fname;
193			FILE *fp;
194
195	greg	2.19	if (*atos(view, sizeof(view), s)) {
196			if (isint(view)) {
197			error(COMMAND, "cannot write view by number");
198			return;
199			}
200	greg	2.18	s = sskip(s);
201	greg	2.19	}
202	greg	2.20	while (isspace(*s))
203			s++;
204			if (*s)
205			atos(rifname, sizeof(rifname), s);
206			else if (rifname[0] == '\0') {
207	greg	2.18	error(COMMAND, "no previous rad file");
208			return;
209			}
210			if ((fname = getpath(rifname, NULL, 0)) == NULL \|\|
211			(fp = fopen(fname, "a")) == NULL) {
212			sprintf(errmsg, "cannot open \"%s\"", rifname);
213			error(COMMAND, errmsg);
214			return;
215			}
216			fputs("view= ", fp);
217			fputs(view, fp);
218			fprintview(&ourview, fp);
219			putc('\n', fp);
220			fclose(fp);
221			}
222
223
224	schorsch	2.43	extern void
225			loadview( /* load view from rad file */
226			char *s
227			)
228	greg	2.18	{
229			char buf[512];
230			char *fname;
231			FILE *fp;
232			VIEW nv;
233
234			strcpy(buf, "rad -n -s -V -v ");
235			if (sscanf(s, "%s", buf+strlen(buf)) == 1)
236			s = sskip(s);
237			else
238			strcat(buf, "1");
239	greg	2.20	if (*s)
240			atos(rifname, sizeof(rifname), s);
241			else if (rifname[0] == '\0') {
242	greg	2.18	error(COMMAND, "no previous rad file");
243			return;
244			}
245	greg	2.19	if ((fname = getpath(rifname, "", R_OK)) == NULL) {
246	greg	2.18	sprintf(errmsg, "cannot access \"%s\"", rifname);
247			error(COMMAND, errmsg);
248			return;
249			}
250			sprintf(buf+strlen(buf), " %s", fname);
251			if ((fp = popen(buf, "r")) == NULL) {
252			error(COMMAND, "cannot run rad");
253			return;
254			}
255			buf[0] = '\0';
256			fgets(buf, sizeof(buf), fp);
257			pclose(fp);
258	schorsch	2.42	nv = stdview;
259	greg	2.18	if (!sscanview(&nv, buf)) {
260			error(COMMAND, "rad error -- no such view?");
261			return;
262			}
263			newview(&nv);
264	greg	1.1	}
265
266
267	schorsch	2.43	extern void
268			getaim( /* aim camera */
269			char *s
270			)
271	greg	1.1	{
272	greg	2.44	VIEW nv = ourview;
273	greg	1.1	double zfact;
274
275			if (getinterest(s, 1, nv.vdir, &zfact) < 0)
276			return;
277	greg	1.21	zoomview(&nv, zfact);
278	greg	1.1	newview(&nv);
279			}
280
281
282	schorsch	2.43	extern void
283			getmove( /* move camera */
284			char *s
285			)
286	greg	1.1	{
287			FVECT vc;
288			double mag;
289
290			if (getinterest(s, 0, vc, &mag) < 0)
291			return;
292	greg	1.4	moveview(0.0, 0.0, mag, vc);
293	greg	1.1	}
294
295
296	schorsch	2.43	extern void
297			getrotate( /* rotate camera */
298			char *s
299			)
300	greg	1.1	{
301	greg	2.44	VIEW nv = ourview;
302	greg	1.1	FVECT v1;
303	greg	1.4	double angle, elev, zfact;
304	greg	1.1
305	greg	1.4	elev = 0.0; zfact = 1.0;
306			if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) {
307	greg	1.1	error(COMMAND, "missing angle");
308			return;
309			}
310			spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
311			if (elev != 0.0) {
312			fcross(v1, nv.vdir, ourview.vup);
313			normalize(v1);
314			spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
315			}
316	greg	1.21	zoomview(&nv, zfact);
317	greg	1.1	newview(&nv);
318			}
319
320
321	schorsch	2.43	extern void
322			getpivot( /* pivot viewpoint */
323			register char *s
324			)
325	greg	1.1	{
326			FVECT vc;
327	greg	1.4	double angle, elev, mag;
328	greg	1.1
329	greg	1.4	elev = 0.0;
330			if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
331	greg	1.1	error(COMMAND, "missing angle");
332			return;
333			}
334	greg	2.33	if (getinterest(sskip2(s,2), 0, vc, &mag) < 0)
335	greg	1.1	return;
336	greg	1.4	moveview(angle, elev, mag, vc);
337	greg	1.1	}
338
339
340	schorsch	2.43	extern void
341			getexposure( /* get new exposure */
342			char *s
343			)
344	greg	1.1	{
345			char buf[128];
346			register char *cp;
347			RECT r;
348			int x, y;
349	greg	2.16	register PNODE *p = &ptrunk;
350			int adapt = 0;
351			double e = 1.0;
352	greg	2.25
353	greg	1.1	for (cp = s; isspace(*cp); cp++)
354			;
355	greg	2.16	if (*cp == '@') {
356			adapt++;
357	greg	2.25	while (isspace(*++cp))
358			;
359	greg	2.16	}
360	greg	1.1	if (cp == '\0') { / normalize to point */
361			if (dev->getcur == NULL)
362			return;
363			(*dev->comout)("Pick point for exposure\n");
364			if ((*dev->getcur)(&x, &y) == ABORT)
365			return;
366			r.l = r.d = 0;
367	greg	1.14	r.r = hresolu; r.u = vresolu;
368	greg	1.1	p = findrect(x, y, &ptrunk, &r, -1);
369			} else {
370			if (cp == '=') { / absolute setting */
371			p = NULL;
372			e = 1.0/exposure;
373			for (cp++; isspace(*cp); cp++)
374			;
375			if (cp == '\0') { / interactive */
376	greg	2.15	sprintf(buf, "exposure (%f): ", exposure);
377	greg	1.1	(*dev->comout)(buf);
378	greg	1.18	(*dev->comin)(buf, NULL);
379	greg	1.1	for (cp = buf; isspace(*cp); cp++)
380			;
381			if (*cp == '\0')
382			return;
383			}
384			}
385			if (cp == '+' \|\| cp == '-') /* f-stops */
386			e *= pow(2.0, atof(cp));
387			else /* multiplier */
388			e *= atof(cp);
389			}
390			if (p != NULL) { /* relative setting */
391	greg	2.14	if (bright(p->v) < 1e-15) {
392	greg	1.1	error(COMMAND, "cannot normalize to zero");
393			return;
394			}
395	greg	2.16	if (adapt)
396			e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure;
397			else
398			e *= 0.5 / bright(p->v);
399	greg	1.1	}
400			if (e <= FTINY \|\| fabs(1.0 - e) <= FTINY)
401			return;
402			scalepict(&ptrunk, e);
403			exposure *= e;
404			redraw();
405			}
406
407	greg	2.38	typedef union {int i; double d; COLOR C;} *MyUptr;
408	greg	1.1
409	schorsch	2.43	extern int
410			getparam( /* get variable from user */
411			char *str,
412			char *dsc,
413			int typ,
414			void *p
415			)
416	greg	1.24	{
417	greg	2.38	register MyUptr ptr = (MyUptr)p;
418	greg	1.24	int i0;
419			double d0, d1, d2;
420			char buf[48];
421
422			switch (typ) {
423			case 'i': /* integer */
424			if (sscanf(str, "%d", &i0) != 1) {
425			(*dev->comout)(dsc);
426			sprintf(buf, " (%d): ", ptr->i);
427			(*dev->comout)(buf);
428			(*dev->comin)(buf, NULL);
429			if (sscanf(buf, "%d", &i0) != 1)
430	greg	1.31	return(0);
431	greg	1.24	}
432			ptr->i = i0;
433	greg	1.31	return(1);
434	greg	1.24	case 'r': /* real */
435			if (sscanf(str, "%lf", &d0) != 1) {
436			(*dev->comout)(dsc);
437			sprintf(buf, " (%.6g): ", ptr->d);
438			(*dev->comout)(buf);
439			(*dev->comin)(buf, NULL);
440			if (sscanf(buf, "%lf", &d0) != 1)
441	greg	1.31	return(0);
442	greg	1.24	}
443			ptr->d = d0;
444	greg	1.31	return(1);
445	greg	1.24	case 'b': /* boolean */
446			if (sscanf(str, "%1s", buf) != 1) {
447			(*dev->comout)(dsc);
448	greg	2.2	sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n');
449	greg	1.24	(*dev->comout)(buf);
450			(*dev->comin)(buf, NULL);
451	greg	1.25	if (buf[0] == '\0' \|\|
452	schorsch	2.41	strchr("yY+1tTnN-0fF", buf[0]) == NULL)
453	greg	1.31	return(0);
454	greg	1.24	}
455	schorsch	2.41	ptr->i = strchr("yY+1tT", buf[0]) != NULL;
456	greg	1.31	return(1);
457	greg	1.24	case 'C': /* color */
458			if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
459			(*dev->comout)(dsc);
460			sprintf(buf, " (%.6g %.6g %.6g): ",
461			colval(ptr->C,RED),
462			colval(ptr->C,GRN),
463			colval(ptr->C,BLU));
464			(*dev->comout)(buf);
465			(*dev->comin)(buf, NULL);
466			if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
467	greg	1.31	return(0);
468	greg	1.24	}
469			setcolor(ptr->C, d0, d1, d2);
470	greg	1.31	return(1);
471	greg	1.24	}
472	schorsch	2.43	return 0; /* nothing matched */
473	greg	1.24	}
474
475
476	schorsch	2.43	extern void
477			setparam( /* get/set program parameter */
478			register char *s
479			)
480	greg	1.1	{
481	greg	1.24	char buf[128];
482	greg	1.1
483			if (s[0] == '\0') {
484	greg	1.23	(*dev->comout)(
485	greg	2.34	"aa ab ad ar as av aw b dc dv dj ds dt i lr lw me ma mg ms ps pt sj st bv: ");
486	greg	1.18	(*dev->comin)(buf, NULL);
487	greg	1.1	s = buf;
488			}
489			switch (s[0]) {
490			case 'l': /* limit */
491			switch (s[1]) {
492			case 'w': /* weight */
493	greg	2.38	getparam(s+2, "limit weight", 'r',
494			(void *)&minweight);
495	greg	1.1	break;
496			case 'r': /* reflection */
497	greg	2.38	getparam(s+2, "limit reflection", 'i',
498			(void *)&maxdepth);
499	greg	1.1	break;
500			default:
501			goto badparam;
502			}
503			break;
504	greg	1.5	case 'd': /* direct */
505			switch (s[1]) {
506			case 'j': /* jitter */
507	greg	2.38	getparam(s+2, "direct jitter", 'r',
508			(void *)&dstrsrc);
509	greg	1.9	break;
510			case 'c': /* certainty */
511	greg	2.38	getparam(s+2, "direct certainty", 'r',
512			(void *)&shadcert);
513	greg	1.5	break;
514	greg	1.8	case 't': /* threshold */
515	greg	2.38	getparam(s+2, "direct threshold", 'r',
516			(void *)&shadthresh);
517	greg	1.5	break;
518	greg	2.13	case 'v': /* visibility */
519	greg	2.38	getparam(s+2, "direct visibility", 'b',
520			(void *)&directvis);
521	greg	1.30	break;
522			case 's': /* sampling */
523	greg	2.38	getparam(s+2, "direct sampling", 'r',
524			(void *)&srcsizerat);
525	greg	1.23	break;
526	greg	1.5	default:
527	greg	1.1	goto badparam;
528			}
529	greg	1.23	break;
530	greg	2.27	case 'b': /* back faces or black and white */
531			switch (s[1]) {
532			case 'v': /* back face visibility */
533	greg	2.38	getparam(s+2, "back face visibility", 'b',
534			(void *)&backvis);
535	greg	2.27	break;
536			case '\0': /* black and white */
537	greg	2.29	case ' ':
538	greg	2.27	case 'y': case 'Y': case 't': case 'T': case '1': case '+':
539			case 'n': case 'N': case 'f': case 'F': case '0': case '-':
540	greg	2.38	getparam(s+1, "black and white", 'b',
541			(void *)&greyscale);
542	greg	2.27	break;
543			default:
544			goto badparam;
545			}
546	greg	1.23	break;
547			case 'i': /* irradiance */
548	greg	2.38	getparam(s+1, "irradiance", 'b',
549			(void *)&do_irrad);
550	greg	1.1	break;
551			case 'a': /* ambient */
552			switch (s[1]) {
553			case 'v': /* value */
554	greg	2.38	getparam(s+2, "ambient value", 'C',
555			(void *)ambval);
556	greg	2.34	break;
557			case 'w': /* weight */
558	greg	2.38	getparam(s+2, "ambient value weight", 'i',
559			(void *)&ambvwt);
560	greg	1.1	break;
561			case 'a': /* accuracy */
562	greg	2.38	if (getparam(s+2, "ambient accuracy", 'r',
563			(void *)&ambacc))
564	greg	2.17	setambacc(ambacc);
565	greg	1.1	break;
566			case 'd': /* divisions */
567	greg	2.38	getparam(s+2, "ambient divisions", 'i',
568			(void *)&ambdiv);
569	greg	1.1	break;
570			case 's': /* samples */
571	greg	2.38	getparam(s+2, "ambient super-samples", 'i',
572			(void *)&ambssamp);
573	greg	1.1	break;
574			case 'b': /* bounces */
575	greg	2.38	getparam(s+2, "ambient bounces", 'i',
576			(void *)&ambounce);
577	greg	1.1	break;
578			case 'r':
579	greg	2.38	if (getparam(s+2, "ambient resolution", 'i',
580			(void *)&ambres))
581	greg	2.8	setambres(ambres);
582	greg	2.32	break;
583			default:
584			goto badparam;
585			}
586			break;
587			case 'm': /* medium */
588			switch (s[1]) {
589			case 'e': /* extinction coefficient */
590			getparam(s+2, "extinction coefficient", 'C',
591	greg	2.38	(void *)cextinction);
592	greg	2.32	break;
593			case 'a': /* scattering albedo */
594	greg	2.35	getparam(s+2, "scattering albedo", 'C',
595	greg	2.38	(void *)salbedo);
596	greg	2.32	break;
597			case 'g': /* scattering eccentricity */
598	greg	2.38	getparam(s+2, "scattering eccentricity", 'r',
599			(void *)&seccg);
600	greg	2.32	break;
601			case 's': /* sampling distance */
602			getparam(s+2, "mist sampling distance", 'r',
603	greg	2.38	(void *)&ssampdist);
604	greg	1.1	break;
605			default:
606			goto badparam;
607			}
608			break;
609	greg	2.5	case 'p': /* pixel */
610	greg	1.1	switch (s[1]) {
611	greg	2.5	case 's': /* sample */
612	greg	2.38	if (getparam(s+2, "pixel sample", 'i',
613			(void *)&psample))
614	greg	1.31	pdepth = 0;
615	greg	1.1	break;
616	greg	1.8	case 't': /* threshold */
617	greg	2.38	if (getparam(s+2, "pixel threshold", 'r',
618			(void *)&maxdiff))
619	greg	1.31	pdepth = 0;
620	greg	2.5	break;
621			default:
622			goto badparam;
623			}
624			break;
625			case 's': /* specular */
626			switch (s[1]) {
627			case 'j': /* jitter */
628	greg	2.38	getparam(s+2, "specular jitter", 'r',
629			(void *)&specjitter);
630	greg	2.5	break;
631			case 't': /* threshold */
632	greg	2.38	getparam(s+2, "specular threshold", 'r',
633			(void *)&specthresh);
634	greg	1.1	break;
635			default:
636			goto badparam;
637			}
638			break;
639			case '\0': /* nothing */
640			break;
641			default:;
642			badparam:
643	greg	1.26	*sskip(s) = '\0';
644	greg	1.1	sprintf(errmsg, "%s: unknown variable", s);
645			error(COMMAND, errmsg);
646			break;
647			}
648			}
649
650
651	schorsch	2.43	extern void
652	greg	1.1	traceray(s) /* trace a single ray */
653			char *s;
654			{
655			char buf[128];
656			int x, y;
657	greg	2.37	OBJREC *ino;
658	greg	1.1	RAY thisray;
659
660	greg	2.26	thisray.rmax = 0.0;
661
662	greg	2.6	if (!sscanvec(s, thisray.rorg) \|\|
663	greg	2.33	!sscanvec(sskip2(s,3), thisray.rdir)) {
664	greg	1.1
665			if (dev->getcur == NULL)
666			return;
667			(*dev->comout)("Pick ray\n");
668			if ((*dev->getcur)(&x, &y) == ABORT)
669			return;
670
671	greg	2.26	if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
672			&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
673	greg	1.21	error(COMMAND, "not on image");
674			return;
675			}
676
677	greg	1.1	} else if (normalize(thisray.rdir) == 0.0) {
678			error(COMMAND, "zero ray direction");
679			return;
680			}
681
682			rayorigin(&thisray, NULL, PRIMARY, 1.0);
683
684			rayvalue(&thisray);
685
686			if (thisray.ro == NULL)
687			(*dev->comout)("ray hit nothing");
688			else {
689	greg	2.23	sprintf(buf, "ray hit %s%s %s \"%s\"",
690			thisray.rod < 0.0 ? "back of " : "",
691	greg	2.22	thisray.ro->omod == OVOID ? VOIDID :
692			objptr(thisray.ro->omod)->oname,
693	greg	1.1	ofun[thisray.ro->otype].funame,
694			thisray.ro->oname);
695	greg	2.37	if ((ino = objptr(thisray.robj)) != thisray.ro)
696			sprintf(buf+strlen(buf), " in %s \"%s\"",
697			ofun[ino->otype].funame, ino->oname);
698	greg	1.1	(*dev->comout)(buf);
699	greg	1.18	(*dev->comin)(buf, NULL);
700	greg	1.1	if (thisray.rot >= FHUGE)
701			(*dev->comout)("at infinity");
702			else {
703	greg	2.30	sprintf(buf, "at (%.6g %.6g %.6g) (%.6g)",
704			thisray.rop[0], thisray.rop[1],
705			thisray.rop[2], thisray.rt);
706	greg	1.1	(*dev->comout)(buf);
707			}
708	greg	1.18	(*dev->comin)(buf, NULL);
709	greg	2.38	sprintf(buf, "value (%.5g %.5g %.5g) (%.3gL)",
710	greg	1.1	colval(thisray.rcol,RED),
711			colval(thisray.rcol,GRN),
712	greg	1.32	colval(thisray.rcol,BLU),
713			luminance(thisray.rcol));
714	greg	1.1	(*dev->comout)(buf);
715			}
716	greg	1.18	(*dev->comin)(buf, NULL);
717	greg	1.1	}
718
719
720	schorsch	2.43	extern void
721	greg	1.1	writepict(s) /* write the picture to a file */
722			char *s;
723			{
724			static char buf[128];
725	greg	1.10	char *fname;
726	greg	1.1	FILE *fp;
727			COLR *scanline;
728			int y;
729
730	greg	2.20	while (isspace(*s))
731			s++;
732			if (*s)
733			atos(buf, sizeof(buf), s);
734			else if (buf[0] == '\0') {
735	greg	1.1	error(COMMAND, "no file");
736			return;
737			}
738	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
739	greg	1.1	(fp = fopen(fname, "w")) == NULL) {
740			sprintf(errmsg, "cannot open \"%s\"", buf);
741			error(COMMAND, errmsg);
742			return;
743			}
744	schorsch	2.40	SET_FILE_BINARY(fp);
745	greg	1.1	(*dev->comout)("writing \"");
746			(*dev->comout)(fname);
747			(*dev->comout)("\"...\n");
748			/* write header */
749	greg	2.24	newheader("RADIANCE", fp);
750	greg	1.1	fputs(progname, fp);
751			fprintview(&ourview, fp);
752	greg	1.29	if (octname != NULL)
753			fprintf(fp, " %s\n", octname);
754			else
755			putc('\n', fp);
756	greg	1.28	fprintf(fp, "SOFTWARE= %s\n", VersionID);
757	greg	2.38	fputnow(fp);
758	greg	1.1	if (exposure != 1.0)
759	greg	1.13	fputexpos(exposure, fp);
760	greg	1.15	if (dev->pixaspect != 1.0)
761			fputaspect(dev->pixaspect, fp);
762	greg	1.22	fputformat(COLRFMT, fp);
763	greg	1.11	putc('\n', fp);
764	greg	1.33	fprtresolu(hresolu, vresolu, fp);
765	greg	1.1
766	greg	1.14	scanline = (COLR )malloc(hresolusizeof(COLR));
767	greg	1.27	if (scanline == NULL) {
768			error(COMMAND, "not enough memory!");
769			fclose(fp);
770			unlink(fname);
771			return;
772			}
773	greg	1.14	for (y = vresolu-1; y >= 0; y--) {
774			getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
775			if (fwritecolrs(scanline, hresolu, fp) < 0)
776	greg	1.1	break;
777			}
778	greg	2.38	free((void *)scanline);
779	greg	1.1	if (fclose(fp) < 0)
780			error(COMMAND, "write error");
781			}