src/rt/rv2.c

#ifndef lint
static const char       RCSid[] = "$Id: rv2.c,v 2.39 2003/02/25 02:47:23 greg Exp $";
#endif
/*
 *  rv2.c - command routines used in tracing a view.
 *
 *  External symbols declared in rpaint.h
 */

#include  <ctype.h>

#include "copyright.h"

#include  "platform.h"
#include  "ray.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;


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


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

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


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

        while (isspace(*s))
                s++;
        if (*s == '-') {                        /* command line parameters */
                copystruct(&nv, &ourview);
                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++;
        } else
                nv.type = ourview.type;
        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++;
        else
                VCOPY(nv.vp, ourview.vp);
        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++;
        else
                VCOPY(nv.vdir, ourview.vdir);
        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++;
        else
                VCOPY(nv.vup, ourview.vup);
        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++;
        else {
                nv.horiz = ourview.horiz; nv.vert = ourview.vert;
        }
        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++;
        else {
                nv.vfore = ourview.vfore; nv.vaft = ourview.vaft;
        }
        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++;
        else {
                nv.hoff = ourview.hoff; nv.voff = ourview.voff;
        }
        if (change)
                newview(&nv);
}


void
lastview(s)                             /* 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 */
                copystruct(&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;
        }
        copystruct(&nv, &ourview);
        copystruct(&ourview, &oldview);
        copystruct(&oldview, &nv);
        newimage();
}


void
saveview(s)                             /* 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);
}


void
loadview(s)                             /* 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);
        copystruct(&nv, &stdview);
        if (!sscanview(&nv, buf)) {
                error(COMMAND, "rad error -- no such view?");
                return;
        }
        newview(&nv);
}


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

        if (getinterest(s, 1, nv.vdir, &zfact) < 0)
                return;
        nv.type = ourview.type;
        VCOPY(nv.vp, ourview.vp);
        VCOPY(nv.vup, ourview.vup);
        nv.horiz = ourview.horiz; nv.vert = ourview.vert;
        nv.vfore = ourview.vfore; nv.vaft = ourview.vaft;
        nv.hoff = ourview.hoff; nv.voff = ourview.voff;
        zoomview(&nv, zfact);
        newview(&nv);
}


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

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


void
getrotate(s)                            /* rotate camera */
char  *s;
{
        VIEW  nv;
        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;
        }
        nv.type = ourview.type;
        VCOPY(nv.vp, ourview.vp);
        VCOPY(nv.vup, ourview.vup);
        nv.hoff = ourview.hoff; nv.voff = ourview.voff;
        nv.vfore = ourview.vfore; nv.vaft = ourview.vaft;
        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.));
        }
        nv.horiz = ourview.horiz; nv.vert = ourview.vert;
        zoomview(&nv, zfact);
        newview(&nv);
}


void
getpivot(s)                             /* 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);
}


void
getexposure(s)                          /* 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;

int
getparam(str, dsc, typ, p)              /* get variable from user */
char  *str, *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' ||
                                        index("yY+1tTnN-0fF", buf[0]) == NULL)
                                return(0);
                }
                ptr->i = index("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);
        }
}


void
setparam(s)                             /* 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;
        }
}


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);
}


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:	2.40
Committed:	Thu Jun 5 19:29:34 2003 UTC (20 years, 10 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.39:	+5 -8 lines
Log Message:	Macros for setting binary file mode. Replacing MSDOS by _WIN32.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.40	static const char RCSid[] = "$Id: rv2.c,v 2.39 2003/02/25 02:47:23 greg 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	2.40	#include <ctype.h>
11
12	greg	2.39	#include "copyright.h"
13	greg	1.1
14	schorsch	2.40	#include "platform.h"
15	greg	1.1	#include "ray.h"
16			#include "otypes.h"
17			#include "rpaint.h"
18
19	greg	2.38	extern int psample; /* pixel sample size */
20			extern double maxdiff; /* max. sample difference */
21	greg	1.1
22	greg	2.4	#define CTRL(c) ((c)-'@')
23	greg	1.1
24	greg	2.6	#ifdef SMLFLT
25			#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
26			#else
27			#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
28			#endif
29
30	greg	2.20	extern char rifname[128]; /* rad input file name */
31	greg	2.18
32	greg	1.1	extern char *progname;
33	greg	1.29	extern char *octname;
34	greg	1.1
35
36	greg	2.38	void
37	greg	1.1	getframe(s) /* get a new frame */
38			char *s;
39			{
40	greg	1.12	if (getrect(s, &pframe) < 0)
41	greg	1.1	return;
42			pdepth = 0;
43			}
44
45
46	greg	2.38	void
47	greg	1.12	getrepaint(s) /* get area and repaint */
48			char *s;
49			{
50			RECT box;
51
52			if (getrect(s, &box) < 0)
53			return;
54	greg	1.14	paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
55	greg	1.12	}
56
57
58	greg	2.38	void
59	greg	1.1	getview(s) /* get/show view parameters */
60			char *s;
61			{
62			FILE *fp;
63			char buf[128];
64	greg	1.10	char *fname;
65	greg	1.3	int change = 0;
66	greg	1.1	VIEW nv;
67
68	greg	2.9	while (isspace(*s))
69			s++;
70			if (s == '-') { / command line parameters */
71			copystruct(&nv, &ourview);
72			if (sscanview(&nv, s))
73			newview(&nv);
74			else
75			error(COMMAND, "bad view option(s)");
76			return;
77			}
78	greg	1.1	if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */
79	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
80	greg	1.1	(fp = fopen(fname, "a")) == NULL) {
81			sprintf(errmsg, "cannot open \"%s\"", buf);
82			error(COMMAND, errmsg);
83			return;
84			}
85	greg	1.2	fputs(progname, fp);
86	greg	1.1	fprintview(&ourview, fp);
87	greg	1.19	fputs(sskip(s), fp);
88	greg	2.18	putc('\n', fp);
89	greg	1.1	fclose(fp);
90			return;
91			}
92			sprintf(buf, "view type (%c): ", ourview.type);
93			(*dev->comout)(buf);
94	greg	1.18	(*dev->comin)(buf, NULL);
95	greg	2.4	if (buf[0] == CTRL('C')) return;
96	greg	1.3	if (buf[0] && buf[0] != ourview.type) {
97	greg	1.1	nv.type = buf[0];
98	greg	1.3	change++;
99			} else
100	greg	1.1	nv.type = ourview.type;
101			sprintf(buf, "view point (%.6g %.6g %.6g): ",
102			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
103			(*dev->comout)(buf);
104	greg	1.18	(*dev->comin)(buf, NULL);
105	greg	2.4	if (buf[0] == CTRL('C')) return;
106	greg	2.6	if (sscanvec(buf, nv.vp))
107	greg	1.3	change++;
108			else
109	greg	1.1	VCOPY(nv.vp, ourview.vp);
110			sprintf(buf, "view direction (%.6g %.6g %.6g): ",
111			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
112			(*dev->comout)(buf);
113	greg	1.18	(*dev->comin)(buf, NULL);
114	greg	2.4	if (buf[0] == CTRL('C')) return;
115	greg	2.6	if (sscanvec(buf, nv.vdir))
116	greg	1.3	change++;
117			else
118	greg	1.1	VCOPY(nv.vdir, ourview.vdir);
119			sprintf(buf, "view up (%.6g %.6g %.6g): ",
120			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
121			(*dev->comout)(buf);
122	greg	1.18	(*dev->comin)(buf, NULL);
123	greg	2.4	if (buf[0] == CTRL('C')) return;
124	greg	2.6	if (sscanvec(buf, nv.vup))
125	greg	1.3	change++;
126			else
127	greg	1.1	VCOPY(nv.vup, ourview.vup);
128			sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
129			ourview.horiz, ourview.vert);
130			(*dev->comout)(buf);
131	greg	1.18	(*dev->comin)(buf, NULL);
132	greg	2.4	if (buf[0] == CTRL('C')) return;
133	greg	1.3	if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
134			change++;
135			else {
136	greg	1.1	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
137			}
138	greg	2.26	sprintf(buf, "fore and aft clipping plane (%.6g %.6g): ",
139			ourview.vfore, ourview.vaft);
140			(*dev->comout)(buf);
141			(*dev->comin)(buf, NULL);
142			if (buf[0] == CTRL('C')) return;
143			if (sscanf(buf, "%lf %lf", &nv.vfore, &nv.vaft) == 2)
144			change++;
145			else {
146			nv.vfore = ourview.vfore; nv.vaft = ourview.vaft;
147			}
148	greg	1.14	sprintf(buf, "view shift and lift (%.6g %.6g): ",
149			ourview.hoff, ourview.voff);
150	greg	1.1	(*dev->comout)(buf);
151	greg	1.18	(*dev->comin)(buf, NULL);
152	greg	2.4	if (buf[0] == CTRL('C')) return;
153	greg	1.14	if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
154	greg	1.3	change++;
155			else {
156	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
157	greg	1.1	}
158	greg	1.3	if (change)
159			newview(&nv);
160	greg	1.1	}
161
162
163	greg	2.38	void
164	greg	1.1	lastview(s) /* return to a previous view */
165			char *s;
166			{
167			char buf[128];
168	greg	1.10	char *fname;
169	greg	1.1	int success;
170			VIEW nv;
171
172			if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */
173	greg	1.17	copystruct(&nv, &stdview);
174	greg	2.19	if ((fname = getpath(buf, "", R_OK)) == NULL \|\|
175	greg	1.33	(success = viewfile(fname, &nv, NULL)) == -1) {
176	greg	1.1	sprintf(errmsg, "cannot open \"%s\"", buf);
177			error(COMMAND, errmsg);
178			return;
179			}
180			if (!success)
181			error(COMMAND, "wrong file format");
182			else
183			newview(&nv);
184			return;
185			}
186	greg	1.20	if (oldview.type == 0) { /* no old view! */
187	greg	1.1	error(COMMAND, "no previous view");
188			return;
189			}
190	greg	1.17	copystruct(&nv, &ourview);
191			copystruct(&ourview, &oldview);
192			copystruct(&oldview, &nv);
193	greg	1.1	newimage();
194	greg	2.18	}
195
196
197	greg	2.38	void
198	greg	2.18	saveview(s) /* save view to rad file */
199			char *s;
200			{
201			char view[64];
202			char *fname;
203			FILE *fp;
204
205	greg	2.19	if (*atos(view, sizeof(view), s)) {
206			if (isint(view)) {
207			error(COMMAND, "cannot write view by number");
208			return;
209			}
210	greg	2.18	s = sskip(s);
211	greg	2.19	}
212	greg	2.20	while (isspace(*s))
213			s++;
214			if (*s)
215			atos(rifname, sizeof(rifname), s);
216			else if (rifname[0] == '\0') {
217	greg	2.18	error(COMMAND, "no previous rad file");
218			return;
219			}
220			if ((fname = getpath(rifname, NULL, 0)) == NULL \|\|
221			(fp = fopen(fname, "a")) == NULL) {
222			sprintf(errmsg, "cannot open \"%s\"", rifname);
223			error(COMMAND, errmsg);
224			return;
225			}
226			fputs("view= ", fp);
227			fputs(view, fp);
228			fprintview(&ourview, fp);
229			putc('\n', fp);
230			fclose(fp);
231			}
232
233
234	greg	2.38	void
235	greg	2.18	loadview(s) /* load view from rad file */
236			char *s;
237			{
238			char buf[512];
239			char *fname;
240			FILE *fp;
241			VIEW nv;
242
243			strcpy(buf, "rad -n -s -V -v ");
244			if (sscanf(s, "%s", buf+strlen(buf)) == 1)
245			s = sskip(s);
246			else
247			strcat(buf, "1");
248	greg	2.20	if (*s)
249			atos(rifname, sizeof(rifname), s);
250			else if (rifname[0] == '\0') {
251	greg	2.18	error(COMMAND, "no previous rad file");
252			return;
253			}
254	greg	2.19	if ((fname = getpath(rifname, "", R_OK)) == NULL) {
255	greg	2.18	sprintf(errmsg, "cannot access \"%s\"", rifname);
256			error(COMMAND, errmsg);
257			return;
258			}
259			sprintf(buf+strlen(buf), " %s", fname);
260			if ((fp = popen(buf, "r")) == NULL) {
261			error(COMMAND, "cannot run rad");
262			return;
263			}
264			buf[0] = '\0';
265			fgets(buf, sizeof(buf), fp);
266			pclose(fp);
267			copystruct(&nv, &stdview);
268			if (!sscanview(&nv, buf)) {
269			error(COMMAND, "rad error -- no such view?");
270			return;
271			}
272			newview(&nv);
273	greg	1.1	}
274
275
276	greg	2.38	void
277	greg	1.1	getaim(s) /* aim camera */
278			char *s;
279			{
280			double zfact;
281			VIEW nv;
282
283			if (getinterest(s, 1, nv.vdir, &zfact) < 0)
284			return;
285	greg	1.21	nv.type = ourview.type;
286	greg	1.1	VCOPY(nv.vp, ourview.vp);
287			VCOPY(nv.vup, ourview.vup);
288	greg	2.28	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
289			nv.vfore = ourview.vfore; nv.vaft = ourview.vaft;
290	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
291	greg	1.21	zoomview(&nv, zfact);
292	greg	1.1	newview(&nv);
293			}
294
295
296	greg	2.38	void
297	greg	1.1	getmove(s) /* move camera */
298			char *s;
299			{
300			FVECT vc;
301			double mag;
302
303			if (getinterest(s, 0, vc, &mag) < 0)
304			return;
305	greg	1.4	moveview(0.0, 0.0, mag, vc);
306	greg	1.1	}
307
308
309	greg	2.38	void
310	greg	1.1	getrotate(s) /* rotate camera */
311			char *s;
312			{
313			VIEW nv;
314			FVECT v1;
315	greg	1.4	double angle, elev, zfact;
316	greg	1.1
317	greg	1.4	elev = 0.0; zfact = 1.0;
318			if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) {
319	greg	1.1	error(COMMAND, "missing angle");
320			return;
321			}
322	greg	1.21	nv.type = ourview.type;
323	greg	1.1	VCOPY(nv.vp, ourview.vp);
324			VCOPY(nv.vup, ourview.vup);
325	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
326	greg	2.28	nv.vfore = ourview.vfore; nv.vaft = ourview.vaft;
327	greg	1.1	spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
328			if (elev != 0.0) {
329			fcross(v1, nv.vdir, ourview.vup);
330			normalize(v1);
331			spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
332			}
333	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
334			zoomview(&nv, zfact);
335	greg	1.1	newview(&nv);
336			}
337
338
339	greg	2.38	void
340	greg	1.1	getpivot(s) /* pivot viewpoint */
341			register char *s;
342			{
343			FVECT vc;
344	greg	1.4	double angle, elev, mag;
345	greg	1.1
346	greg	1.4	elev = 0.0;
347			if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
348	greg	1.1	error(COMMAND, "missing angle");
349			return;
350			}
351	greg	2.33	if (getinterest(sskip2(s,2), 0, vc, &mag) < 0)
352	greg	1.1	return;
353	greg	1.4	moveview(angle, elev, mag, vc);
354	greg	1.1	}
355
356
357	greg	2.38	void
358	greg	1.1	getexposure(s) /* get new exposure */
359			char *s;
360			{
361			char buf[128];
362			register char *cp;
363			RECT r;
364			int x, y;
365	greg	2.16	register PNODE *p = &ptrunk;
366			int adapt = 0;
367			double e = 1.0;
368	greg	2.25
369	greg	1.1	for (cp = s; isspace(*cp); cp++)
370			;
371	greg	2.16	if (*cp == '@') {
372			adapt++;
373	greg	2.25	while (isspace(*++cp))
374			;
375	greg	2.16	}
376	greg	1.1	if (cp == '\0') { / normalize to point */
377			if (dev->getcur == NULL)
378			return;
379			(*dev->comout)("Pick point for exposure\n");
380			if ((*dev->getcur)(&x, &y) == ABORT)
381			return;
382			r.l = r.d = 0;
383	greg	1.14	r.r = hresolu; r.u = vresolu;
384	greg	1.1	p = findrect(x, y, &ptrunk, &r, -1);
385			} else {
386			if (cp == '=') { / absolute setting */
387			p = NULL;
388			e = 1.0/exposure;
389			for (cp++; isspace(*cp); cp++)
390			;
391			if (cp == '\0') { / interactive */
392	greg	2.15	sprintf(buf, "exposure (%f): ", exposure);
393	greg	1.1	(*dev->comout)(buf);
394	greg	1.18	(*dev->comin)(buf, NULL);
395	greg	1.1	for (cp = buf; isspace(*cp); cp++)
396			;
397			if (*cp == '\0')
398			return;
399			}
400			}
401			if (cp == '+' \|\| cp == '-') /* f-stops */
402			e *= pow(2.0, atof(cp));
403			else /* multiplier */
404			e *= atof(cp);
405			}
406			if (p != NULL) { /* relative setting */
407	greg	2.14	if (bright(p->v) < 1e-15) {
408	greg	1.1	error(COMMAND, "cannot normalize to zero");
409			return;
410			}
411	greg	2.16	if (adapt)
412			e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure;
413			else
414			e *= 0.5 / bright(p->v);
415	greg	1.1	}
416			if (e <= FTINY \|\| fabs(1.0 - e) <= FTINY)
417			return;
418			scalepict(&ptrunk, e);
419			exposure *= e;
420			redraw();
421			}
422
423	greg	2.38	typedef union {int i; double d; COLOR C;} *MyUptr;
424	greg	1.1
425	greg	2.38	int
426			getparam(str, dsc, typ, p) /* get variable from user */
427	greg	1.24	char str, dsc;
428			int typ;
429	greg	2.38	void *p;
430	greg	1.24	{
431	greg	2.38	register MyUptr ptr = (MyUptr)p;
432	greg	1.24	int i0;
433			double d0, d1, d2;
434			char buf[48];
435
436			switch (typ) {
437			case 'i': /* integer */
438			if (sscanf(str, "%d", &i0) != 1) {
439			(*dev->comout)(dsc);
440			sprintf(buf, " (%d): ", ptr->i);
441			(*dev->comout)(buf);
442			(*dev->comin)(buf, NULL);
443			if (sscanf(buf, "%d", &i0) != 1)
444	greg	1.31	return(0);
445	greg	1.24	}
446			ptr->i = i0;
447	greg	1.31	return(1);
448	greg	1.24	case 'r': /* real */
449			if (sscanf(str, "%lf", &d0) != 1) {
450			(*dev->comout)(dsc);
451			sprintf(buf, " (%.6g): ", ptr->d);
452			(*dev->comout)(buf);
453			(*dev->comin)(buf, NULL);
454			if (sscanf(buf, "%lf", &d0) != 1)
455	greg	1.31	return(0);
456	greg	1.24	}
457			ptr->d = d0;
458	greg	1.31	return(1);
459	greg	1.24	case 'b': /* boolean */
460			if (sscanf(str, "%1s", buf) != 1) {
461			(*dev->comout)(dsc);
462	greg	2.2	sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n');
463	greg	1.24	(*dev->comout)(buf);
464			(*dev->comin)(buf, NULL);
465	greg	1.25	if (buf[0] == '\0' \|\|
466			index("yY+1tTnN-0fF", buf[0]) == NULL)
467	greg	1.31	return(0);
468	greg	1.24	}
469	greg	1.25	ptr->i = index("yY+1tT", buf[0]) != NULL;
470	greg	1.31	return(1);
471	greg	1.24	case 'C': /* color */
472			if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
473			(*dev->comout)(dsc);
474			sprintf(buf, " (%.6g %.6g %.6g): ",
475			colval(ptr->C,RED),
476			colval(ptr->C,GRN),
477			colval(ptr->C,BLU));
478			(*dev->comout)(buf);
479			(*dev->comin)(buf, NULL);
480			if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
481	greg	1.31	return(0);
482	greg	1.24	}
483			setcolor(ptr->C, d0, d1, d2);
484	greg	1.31	return(1);
485	greg	1.24	}
486			}
487
488
489	greg	2.38	void
490	greg	1.1	setparam(s) /* get/set program parameter */
491			register char *s;
492			{
493	greg	1.24	char buf[128];
494	greg	1.1
495			if (s[0] == '\0') {
496	greg	1.23	(*dev->comout)(
497	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: ");
498	greg	1.18	(*dev->comin)(buf, NULL);
499	greg	1.1	s = buf;
500			}
501			switch (s[0]) {
502			case 'l': /* limit */
503			switch (s[1]) {
504			case 'w': /* weight */
505	greg	2.38	getparam(s+2, "limit weight", 'r',
506			(void *)&minweight);
507	greg	1.1	break;
508			case 'r': /* reflection */
509	greg	2.38	getparam(s+2, "limit reflection", 'i',
510			(void *)&maxdepth);
511	greg	1.1	break;
512			default:
513			goto badparam;
514			}
515			break;
516	greg	1.5	case 'd': /* direct */
517			switch (s[1]) {
518			case 'j': /* jitter */
519	greg	2.38	getparam(s+2, "direct jitter", 'r',
520			(void *)&dstrsrc);
521	greg	1.9	break;
522			case 'c': /* certainty */
523	greg	2.38	getparam(s+2, "direct certainty", 'r',
524			(void *)&shadcert);
525	greg	1.5	break;
526	greg	1.8	case 't': /* threshold */
527	greg	2.38	getparam(s+2, "direct threshold", 'r',
528			(void *)&shadthresh);
529	greg	1.5	break;
530	greg	2.13	case 'v': /* visibility */
531	greg	2.38	getparam(s+2, "direct visibility", 'b',
532			(void *)&directvis);
533	greg	1.30	break;
534			case 's': /* sampling */
535	greg	2.38	getparam(s+2, "direct sampling", 'r',
536			(void *)&srcsizerat);
537	greg	1.23	break;
538	greg	1.5	default:
539	greg	1.1	goto badparam;
540			}
541	greg	1.23	break;
542	greg	2.27	case 'b': /* back faces or black and white */
543			switch (s[1]) {
544			case 'v': /* back face visibility */
545	greg	2.38	getparam(s+2, "back face visibility", 'b',
546			(void *)&backvis);
547	greg	2.27	break;
548			case '\0': /* black and white */
549	greg	2.29	case ' ':
550	greg	2.27	case 'y': case 'Y': case 't': case 'T': case '1': case '+':
551			case 'n': case 'N': case 'f': case 'F': case '0': case '-':
552	greg	2.38	getparam(s+1, "black and white", 'b',
553			(void *)&greyscale);
554	greg	2.27	break;
555			default:
556			goto badparam;
557			}
558	greg	1.23	break;
559			case 'i': /* irradiance */
560	greg	2.38	getparam(s+1, "irradiance", 'b',
561			(void *)&do_irrad);
562	greg	1.1	break;
563			case 'a': /* ambient */
564			switch (s[1]) {
565			case 'v': /* value */
566	greg	2.38	getparam(s+2, "ambient value", 'C',
567			(void *)ambval);
568	greg	2.34	break;
569			case 'w': /* weight */
570	greg	2.38	getparam(s+2, "ambient value weight", 'i',
571			(void *)&ambvwt);
572	greg	1.1	break;
573			case 'a': /* accuracy */
574	greg	2.38	if (getparam(s+2, "ambient accuracy", 'r',
575			(void *)&ambacc))
576	greg	2.17	setambacc(ambacc);
577	greg	1.1	break;
578			case 'd': /* divisions */
579	greg	2.38	getparam(s+2, "ambient divisions", 'i',
580			(void *)&ambdiv);
581	greg	1.1	break;
582			case 's': /* samples */
583	greg	2.38	getparam(s+2, "ambient super-samples", 'i',
584			(void *)&ambssamp);
585	greg	1.1	break;
586			case 'b': /* bounces */
587	greg	2.38	getparam(s+2, "ambient bounces", 'i',
588			(void *)&ambounce);
589	greg	1.1	break;
590			case 'r':
591	greg	2.38	if (getparam(s+2, "ambient resolution", 'i',
592			(void *)&ambres))
593	greg	2.8	setambres(ambres);
594	greg	2.32	break;
595			default:
596			goto badparam;
597			}
598			break;
599			case 'm': /* medium */
600			switch (s[1]) {
601			case 'e': /* extinction coefficient */
602			getparam(s+2, "extinction coefficient", 'C',
603	greg	2.38	(void *)cextinction);
604	greg	2.32	break;
605			case 'a': /* scattering albedo */
606	greg	2.35	getparam(s+2, "scattering albedo", 'C',
607	greg	2.38	(void *)salbedo);
608	greg	2.32	break;
609			case 'g': /* scattering eccentricity */
610	greg	2.38	getparam(s+2, "scattering eccentricity", 'r',
611			(void *)&seccg);
612	greg	2.32	break;
613			case 's': /* sampling distance */
614			getparam(s+2, "mist sampling distance", 'r',
615	greg	2.38	(void *)&ssampdist);
616	greg	1.1	break;
617			default:
618			goto badparam;
619			}
620			break;
621	greg	2.5	case 'p': /* pixel */
622	greg	1.1	switch (s[1]) {
623	greg	2.5	case 's': /* sample */
624	greg	2.38	if (getparam(s+2, "pixel sample", 'i',
625			(void *)&psample))
626	greg	1.31	pdepth = 0;
627	greg	1.1	break;
628	greg	1.8	case 't': /* threshold */
629	greg	2.38	if (getparam(s+2, "pixel threshold", 'r',
630			(void *)&maxdiff))
631	greg	1.31	pdepth = 0;
632	greg	2.5	break;
633			default:
634			goto badparam;
635			}
636			break;
637			case 's': /* specular */
638			switch (s[1]) {
639			case 'j': /* jitter */
640	greg	2.38	getparam(s+2, "specular jitter", 'r',
641			(void *)&specjitter);
642	greg	2.5	break;
643			case 't': /* threshold */
644	greg	2.38	getparam(s+2, "specular threshold", 'r',
645			(void *)&specthresh);
646	greg	1.1	break;
647			default:
648			goto badparam;
649			}
650			break;
651			case '\0': /* nothing */
652			break;
653			default:;
654			badparam:
655	greg	1.26	*sskip(s) = '\0';
656	greg	1.1	sprintf(errmsg, "%s: unknown variable", s);
657			error(COMMAND, errmsg);
658			break;
659			}
660			}
661
662
663	greg	2.38	void
664	greg	1.1	traceray(s) /* trace a single ray */
665			char *s;
666			{
667			char buf[128];
668			int x, y;
669	greg	2.37	OBJREC *ino;
670	greg	1.1	RAY thisray;
671
672	greg	2.26	thisray.rmax = 0.0;
673
674	greg	2.6	if (!sscanvec(s, thisray.rorg) \|\|
675	greg	2.33	!sscanvec(sskip2(s,3), thisray.rdir)) {
676	greg	1.1
677			if (dev->getcur == NULL)
678			return;
679			(*dev->comout)("Pick ray\n");
680			if ((*dev->getcur)(&x, &y) == ABORT)
681			return;
682
683	greg	2.26	if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
684			&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
685	greg	1.21	error(COMMAND, "not on image");
686			return;
687			}
688
689	greg	1.1	} else if (normalize(thisray.rdir) == 0.0) {
690			error(COMMAND, "zero ray direction");
691			return;
692			}
693
694			rayorigin(&thisray, NULL, PRIMARY, 1.0);
695
696			rayvalue(&thisray);
697
698			if (thisray.ro == NULL)
699			(*dev->comout)("ray hit nothing");
700			else {
701	greg	2.23	sprintf(buf, "ray hit %s%s %s \"%s\"",
702			thisray.rod < 0.0 ? "back of " : "",
703	greg	2.22	thisray.ro->omod == OVOID ? VOIDID :
704			objptr(thisray.ro->omod)->oname,
705	greg	1.1	ofun[thisray.ro->otype].funame,
706			thisray.ro->oname);
707	greg	2.37	if ((ino = objptr(thisray.robj)) != thisray.ro)
708			sprintf(buf+strlen(buf), " in %s \"%s\"",
709			ofun[ino->otype].funame, ino->oname);
710	greg	1.1	(*dev->comout)(buf);
711	greg	1.18	(*dev->comin)(buf, NULL);
712	greg	1.1	if (thisray.rot >= FHUGE)
713			(*dev->comout)("at infinity");
714			else {
715	greg	2.30	sprintf(buf, "at (%.6g %.6g %.6g) (%.6g)",
716			thisray.rop[0], thisray.rop[1],
717			thisray.rop[2], thisray.rt);
718	greg	1.1	(*dev->comout)(buf);
719			}
720	greg	1.18	(*dev->comin)(buf, NULL);
721	greg	2.38	sprintf(buf, "value (%.5g %.5g %.5g) (%.3gL)",
722	greg	1.1	colval(thisray.rcol,RED),
723			colval(thisray.rcol,GRN),
724	greg	1.32	colval(thisray.rcol,BLU),
725			luminance(thisray.rcol));
726	greg	1.1	(*dev->comout)(buf);
727			}
728	greg	1.18	(*dev->comin)(buf, NULL);
729	greg	1.1	}
730
731
732	greg	2.38	void
733	greg	1.1	writepict(s) /* write the picture to a file */
734			char *s;
735			{
736			static char buf[128];
737	greg	1.10	char *fname;
738	greg	1.1	FILE *fp;
739			COLR *scanline;
740			int y;
741
742	greg	2.20	while (isspace(*s))
743			s++;
744			if (*s)
745			atos(buf, sizeof(buf), s);
746			else if (buf[0] == '\0') {
747	greg	1.1	error(COMMAND, "no file");
748			return;
749			}
750	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
751	greg	1.1	(fp = fopen(fname, "w")) == NULL) {
752			sprintf(errmsg, "cannot open \"%s\"", buf);
753			error(COMMAND, errmsg);
754			return;
755			}
756	schorsch	2.40	SET_FILE_BINARY(fp);
757	greg	1.1	(*dev->comout)("writing \"");
758			(*dev->comout)(fname);
759			(*dev->comout)("\"...\n");
760			/* write header */
761	greg	2.24	newheader("RADIANCE", fp);
762	greg	1.1	fputs(progname, fp);
763			fprintview(&ourview, fp);
764	greg	1.29	if (octname != NULL)
765			fprintf(fp, " %s\n", octname);
766			else
767			putc('\n', fp);
768	greg	1.28	fprintf(fp, "SOFTWARE= %s\n", VersionID);
769	greg	2.38	fputnow(fp);
770	greg	1.1	if (exposure != 1.0)
771	greg	1.13	fputexpos(exposure, fp);
772	greg	1.15	if (dev->pixaspect != 1.0)
773			fputaspect(dev->pixaspect, fp);
774	greg	1.22	fputformat(COLRFMT, fp);
775	greg	1.11	putc('\n', fp);
776	greg	1.33	fprtresolu(hresolu, vresolu, fp);
777	greg	1.1
778	greg	1.14	scanline = (COLR )malloc(hresolusizeof(COLR));
779	greg	1.27	if (scanline == NULL) {
780			error(COMMAND, "not enough memory!");
781			fclose(fp);
782			unlink(fname);
783			return;
784			}
785	greg	1.14	for (y = vresolu-1; y >= 0; y--) {
786			getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
787			if (fwritecolrs(scanline, hresolu, fp) < 0)
788	greg	1.1	break;
789			}
790	greg	2.38	free((void *)scanline);
791	greg	1.1	if (fclose(fp) < 0)
792			error(COMMAND, "write error");
793			}