src/rt/rv2.c

/* Copyright (c) 1993 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  rv2.c - command routines used in tracing a view.
 *
 *     3/24/87
 */

#include  "ray.h"

#include  "octree.h"

#include  "otypes.h"

#include  "rpaint.h"

#include  "resolu.h"

#include  <ctype.h>

#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  *atos();

extern FILE  *popen();

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

extern char  VersionID[];
extern char  *progname;
extern char  *octname;


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


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

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


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, "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);
}


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();
}


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);
}


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);
}


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.hoff = ourview.hoff; nv.voff = ourview.voff;
        nv.horiz = ourview.horiz; nv.vert = ourview.vert;
        zoomview(&nv, zfact);
        newview(&nv);
}


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);
}


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;
        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);
}


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(sskip(sskip(s)), 0, vc, &mag) < 0)
                return;
        moveview(angle, elev, mag, vc);
}


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();
}


getparam(str, dsc, typ, ptr)            /* get variable from user */
char  *str, *dsc;
int  typ;
register union {int i; double d; COLOR C;}  *ptr;
{
        extern char  *index();
        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);
        }
}


setparam(s)                             /* get/set program parameter */
register char  *s;
{
        extern int  psample;
        extern double  maxdiff;
        extern double  minweight;
        extern int  maxdepth;
        extern double  dstrsrc;
        extern double  shadthresh;
        extern double  shadcert;
        extern COLOR  ambval;
        extern double  ambacc;
        extern int  ambres;
        extern int  ambdiv;
        extern int  ambssamp;
        extern int  ambounce;
        extern int  directvis;
        extern double  srcsizerat;
        extern int  do_irrad;
        extern double  specjitter;
        extern double  specthresh;
        char  buf[128];
        
        if (s[0] == '\0') {
                (*dev->comout)(
                "aa ab ad ar as av b dc di dj ds dt i lr lw ps pt sj st: ");
                (*dev->comin)(buf, NULL);
                s = buf;
        }
        switch (s[0]) {
        case 'l':                       /* limit */
                switch (s[1]) {
                case 'w':                       /* weight */
                        getparam(s+2, "limit weight", 'r', &minweight);
                        break;
                case 'r':                       /* reflection */
                        getparam(s+2, "limit reflection", 'i', &maxdepth);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'd':                       /* direct */
                switch (s[1]) {
                case 'j':                       /* jitter */
                        getparam(s+2, "direct jitter", 'r', &dstrsrc);
                        break;
                case 'c':                       /* certainty */
                        getparam(s+2, "direct certainty", 'r', &shadcert);
                        break;
                case 't':                       /* threshold */
                        getparam(s+2, "direct threshold", 'r', &shadthresh);
                        break;
                case 'v':                       /* visibility */
                        getparam(s+2, "direct visibility",
                                        'b', &directvis);
                        break;
                case 's':                       /* sampling */
                        getparam(s+2, "direct sampling", 'r', &srcsizerat);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'b':                       /* black and white */
                getparam(s+1, "black and white", 'b', &greyscale);
                break;
        case 'i':                       /* irradiance */
                getparam(s+1, "irradiance", 'b', &do_irrad);
                break;
        case 'a':                       /* ambient */
                switch (s[1]) {
                case 'v':                       /* value */
                        getparam(s+2, "ambient value", 'C', (COLOR *)ambval);
                        break;
                case 'a':                       /* accuracy */
                        if (getparam(s+2, "ambient accuracy", 'r', &ambacc))
                                setambacc(ambacc);
                        break;
                case 'd':                       /* divisions */
                        getparam(s+2, "ambient divisions", 'i', &ambdiv);
                        break;
                case 's':                       /* samples */
                        getparam(s+2, "ambient super-samples", 'i', &ambssamp);
                        break;
                case 'b':                       /* bounces */
                        getparam(s+2, "ambient bounces", 'i', &ambounce);
                        break;
                case 'r':
                        if (getparam(s+2, "ambient resolution", 'i', &ambres))
                                setambres(ambres);
                        break;
                default:
                        goto badparam;
                }
                break;
        case 'p':                       /* pixel */
                switch (s[1]) {
                case 's':                       /* sample */
                        if (getparam(s+2, "pixel sample", 'i', &psample))
                                pdepth = 0;
                        break;
                case 't':                       /* threshold */
                        if (getparam(s+2, "pixel threshold", 'r', &maxdiff))
                                pdepth = 0;
                        break;
                default:
                        goto badparam;
                }
                break;
        case 's':                       /* specular */
                switch (s[1]) {
                case 'j':                       /* jitter */
                        getparam(s+2, "specular jitter", 'r', &specjitter);
                        break;
                case 't':                       /* threshold */
                        getparam(s+2, "specular threshold", 'r', &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;
        }
}


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

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

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

                if (viewray(thisray.rorg, thisray.rdir, &ourview,
                                (x+.5)/hresolu, (y+.5)/vresolu) < 0) {
                        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);
                (*dev->comout)(buf);
                (*dev->comin)(buf, NULL);
                if (thisray.rot >= FHUGE)
                        (*dev->comout)("at infinity");
                else {
                        sprintf(buf, "at (%.6g %.6g %.6g)", thisray.rop[0],
                                        thisray.rop[1], thisray.rop[2]);
                        (*dev->comout)(buf);
                }
                (*dev->comin)(buf, NULL);
                sprintf(buf, "value (%.5g %.5g %.5g) (%.1fL)",
                                colval(thisray.rcol,RED),
                                colval(thisray.rcol,GRN),
                                colval(thisray.rcol,BLU),
                                luminance(thisray.rcol));
                (*dev->comout)(buf);
        }
        (*dev->comin)(buf, NULL);
}


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;
        }
#ifdef MSDOS
        setmode(fileno(fp), O_BINARY);
#endif
        (*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);
        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((char *)scanline);
        if (fclose(fp) < 0)
                error(COMMAND, "write error");
}
Revision:	2.25
Committed:	Tue Jul 12 15:24:28 1994 UTC (29 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.24:	+3 -2 lines
Log Message:	fixed bug in e @ specification
#	User	Rev	Content
1	greg	2.16	/* Copyright (c) 1993 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* rv2.c - command routines used in tracing a view.
9			*
10			* 3/24/87
11			*/
12
13			#include "ray.h"
14
15			#include "octree.h"
16
17			#include "otypes.h"
18
19			#include "rpaint.h"
20
21	greg	1.33	#include "resolu.h"
22
23	greg	1.1	#include <ctype.h>
24
25	greg	2.4	#define CTRL(c) ((c)-'@')
26	greg	1.1
27	greg	2.6	#ifdef SMLFLT
28			#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
29			#else
30			#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
31			#endif
32
33	greg	2.18	extern char *atos();
34	greg	2.6
35	greg	2.21	extern FILE *popen();
36
37	greg	2.20	extern char rifname[128]; /* rad input file name */
38	greg	2.18
39	greg	1.29	extern char VersionID[];
40	greg	1.1	extern char *progname;
41	greg	1.29	extern char *octname;
42	greg	1.1
43
44			getframe(s) /* get a new frame */
45			char *s;
46			{
47	greg	1.12	if (getrect(s, &pframe) < 0)
48	greg	1.1	return;
49			pdepth = 0;
50			}
51
52
53	greg	1.12	getrepaint(s) /* get area and repaint */
54			char *s;
55			{
56			RECT box;
57
58			if (getrect(s, &box) < 0)
59			return;
60	greg	1.14	paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
61	greg	1.12	}
62
63
64	greg	1.1	getview(s) /* get/show view parameters */
65			char *s;
66			{
67			FILE *fp;
68			char buf[128];
69	greg	1.10	char *fname;
70	greg	1.3	int change = 0;
71	greg	1.1	VIEW nv;
72
73	greg	2.9	while (isspace(*s))
74			s++;
75			if (s == '-') { / command line parameters */
76			copystruct(&nv, &ourview);
77			if (sscanview(&nv, s))
78			newview(&nv);
79			else
80			error(COMMAND, "bad view option(s)");
81			return;
82			}
83	greg	1.1	if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */
84	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
85	greg	1.1	(fp = fopen(fname, "a")) == NULL) {
86			sprintf(errmsg, "cannot open \"%s\"", buf);
87			error(COMMAND, errmsg);
88			return;
89			}
90	greg	1.2	fputs(progname, fp);
91	greg	1.1	fprintview(&ourview, fp);
92	greg	1.19	fputs(sskip(s), fp);
93	greg	2.18	putc('\n', fp);
94	greg	1.1	fclose(fp);
95			return;
96			}
97			sprintf(buf, "view type (%c): ", ourview.type);
98			(*dev->comout)(buf);
99	greg	1.18	(*dev->comin)(buf, NULL);
100	greg	2.4	if (buf[0] == CTRL('C')) return;
101	greg	1.3	if (buf[0] && buf[0] != ourview.type) {
102	greg	1.1	nv.type = buf[0];
103	greg	1.3	change++;
104			} else
105	greg	1.1	nv.type = ourview.type;
106			sprintf(buf, "view point (%.6g %.6g %.6g): ",
107			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
108			(*dev->comout)(buf);
109	greg	1.18	(*dev->comin)(buf, NULL);
110	greg	2.4	if (buf[0] == CTRL('C')) return;
111	greg	2.6	if (sscanvec(buf, nv.vp))
112	greg	1.3	change++;
113			else
114	greg	1.1	VCOPY(nv.vp, ourview.vp);
115			sprintf(buf, "view direction (%.6g %.6g %.6g): ",
116			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
117			(*dev->comout)(buf);
118	greg	1.18	(*dev->comin)(buf, NULL);
119	greg	2.4	if (buf[0] == CTRL('C')) return;
120	greg	2.6	if (sscanvec(buf, nv.vdir))
121	greg	1.3	change++;
122			else
123	greg	1.1	VCOPY(nv.vdir, ourview.vdir);
124			sprintf(buf, "view up (%.6g %.6g %.6g): ",
125			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
126			(*dev->comout)(buf);
127	greg	1.18	(*dev->comin)(buf, NULL);
128	greg	2.4	if (buf[0] == CTRL('C')) return;
129	greg	2.6	if (sscanvec(buf, nv.vup))
130	greg	1.3	change++;
131			else
132	greg	1.1	VCOPY(nv.vup, ourview.vup);
133			sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
134			ourview.horiz, ourview.vert);
135			(*dev->comout)(buf);
136	greg	1.18	(*dev->comin)(buf, NULL);
137	greg	2.4	if (buf[0] == CTRL('C')) return;
138	greg	1.3	if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
139			change++;
140			else {
141	greg	1.1	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
142			}
143	greg	1.14	sprintf(buf, "view shift and lift (%.6g %.6g): ",
144			ourview.hoff, ourview.voff);
145	greg	1.1	(*dev->comout)(buf);
146	greg	1.18	(*dev->comin)(buf, NULL);
147	greg	2.4	if (buf[0] == CTRL('C')) return;
148	greg	1.14	if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
149	greg	1.3	change++;
150			else {
151	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
152	greg	1.1	}
153	greg	1.3	if (change)
154			newview(&nv);
155	greg	1.1	}
156
157
158			lastview(s) /* return to a previous view */
159			char *s;
160			{
161			char buf[128];
162	greg	1.10	char *fname;
163	greg	1.1	int success;
164			VIEW nv;
165
166			if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */
167	greg	1.17	copystruct(&nv, &stdview);
168	greg	2.19	if ((fname = getpath(buf, "", R_OK)) == NULL \|\|
169	greg	1.33	(success = viewfile(fname, &nv, NULL)) == -1) {
170	greg	1.1	sprintf(errmsg, "cannot open \"%s\"", buf);
171			error(COMMAND, errmsg);
172			return;
173			}
174			if (!success)
175			error(COMMAND, "wrong file format");
176			else
177			newview(&nv);
178			return;
179			}
180	greg	1.20	if (oldview.type == 0) { /* no old view! */
181	greg	1.1	error(COMMAND, "no previous view");
182			return;
183			}
184	greg	1.17	copystruct(&nv, &ourview);
185			copystruct(&ourview, &oldview);
186			copystruct(&oldview, &nv);
187	greg	1.1	newimage();
188	greg	2.18	}
189
190
191			saveview(s) /* save view to rad file */
192			char *s;
193			{
194			char view[64];
195			char *fname;
196			FILE *fp;
197
198	greg	2.19	if (*atos(view, sizeof(view), s)) {
199			if (isint(view)) {
200			error(COMMAND, "cannot write view by number");
201			return;
202			}
203	greg	2.18	s = sskip(s);
204	greg	2.19	}
205	greg	2.20	while (isspace(*s))
206			s++;
207			if (*s)
208			atos(rifname, sizeof(rifname), s);
209			else if (rifname[0] == '\0') {
210	greg	2.18	error(COMMAND, "no previous rad file");
211			return;
212			}
213			if ((fname = getpath(rifname, NULL, 0)) == NULL \|\|
214			(fp = fopen(fname, "a")) == NULL) {
215			sprintf(errmsg, "cannot open \"%s\"", rifname);
216			error(COMMAND, errmsg);
217			return;
218			}
219			fputs("view= ", fp);
220			fputs(view, fp);
221			fprintview(&ourview, fp);
222			putc('\n', fp);
223			fclose(fp);
224			}
225
226
227			loadview(s) /* load view from rad file */
228			char *s;
229			{
230			char buf[512];
231			char *fname;
232			FILE *fp;
233			VIEW nv;
234
235			strcpy(buf, "rad -n -s -V -v ");
236			if (sscanf(s, "%s", buf+strlen(buf)) == 1)
237			s = sskip(s);
238			else
239			strcat(buf, "1");
240	greg	2.20	if (*s)
241			atos(rifname, sizeof(rifname), s);
242			else if (rifname[0] == '\0') {
243	greg	2.18	error(COMMAND, "no previous rad file");
244			return;
245			}
246	greg	2.19	if ((fname = getpath(rifname, "", R_OK)) == NULL) {
247	greg	2.18	sprintf(errmsg, "cannot access \"%s\"", rifname);
248			error(COMMAND, errmsg);
249			return;
250			}
251			sprintf(buf+strlen(buf), " %s", fname);
252			if ((fp = popen(buf, "r")) == NULL) {
253			error(COMMAND, "cannot run rad");
254			return;
255			}
256			buf[0] = '\0';
257			fgets(buf, sizeof(buf), fp);
258			pclose(fp);
259			copystruct(&nv, &stdview);
260			if (!sscanview(&nv, buf)) {
261			error(COMMAND, "rad error -- no such view?");
262			return;
263			}
264			newview(&nv);
265	greg	1.1	}
266
267
268			getaim(s) /* aim camera */
269			char *s;
270			{
271			double zfact;
272			VIEW nv;
273
274			if (getinterest(s, 1, nv.vdir, &zfact) < 0)
275			return;
276	greg	1.21	nv.type = ourview.type;
277	greg	1.1	VCOPY(nv.vp, ourview.vp);
278			VCOPY(nv.vup, ourview.vup);
279	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
280	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
281			zoomview(&nv, zfact);
282	greg	1.1	newview(&nv);
283			}
284
285
286			getmove(s) /* move camera */
287			char *s;
288			{
289			FVECT vc;
290			double mag;
291
292			if (getinterest(s, 0, vc, &mag) < 0)
293			return;
294	greg	1.4	moveview(0.0, 0.0, mag, vc);
295	greg	1.1	}
296
297
298			getrotate(s) /* rotate camera */
299			char *s;
300			{
301			VIEW nv;
302			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	greg	1.21	nv.type = ourview.type;
311	greg	1.1	VCOPY(nv.vp, ourview.vp);
312			VCOPY(nv.vup, ourview.vup);
313	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
314	greg	1.1	spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
315			if (elev != 0.0) {
316			fcross(v1, nv.vdir, ourview.vup);
317			normalize(v1);
318			spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
319			}
320	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
321			zoomview(&nv, zfact);
322	greg	1.1	newview(&nv);
323			}
324
325
326			getpivot(s) /* pivot viewpoint */
327			register char *s;
328			{
329			FVECT vc;
330	greg	1.4	double angle, elev, mag;
331	greg	1.1
332	greg	1.4	elev = 0.0;
333			if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
334	greg	1.1	error(COMMAND, "missing angle");
335			return;
336			}
337	greg	1.4	if (getinterest(sskip(sskip(s)), 0, vc, &mag) < 0)
338	greg	1.1	return;
339	greg	1.4	moveview(angle, elev, mag, vc);
340	greg	1.1	}
341
342
343			getexposure(s) /* get new exposure */
344			char *s;
345			{
346			char buf[128];
347			register char *cp;
348			RECT r;
349			int x, y;
350	greg	2.16	register PNODE *p = &ptrunk;
351			int adapt = 0;
352			double e = 1.0;
353	greg	2.25
354	greg	1.1	for (cp = s; isspace(*cp); cp++)
355			;
356	greg	2.16	if (*cp == '@') {
357			adapt++;
358	greg	2.25	while (isspace(*++cp))
359			;
360	greg	2.16	}
361	greg	1.1	if (cp == '\0') { / normalize to point */
362			if (dev->getcur == NULL)
363			return;
364			(*dev->comout)("Pick point for exposure\n");
365			if ((*dev->getcur)(&x, &y) == ABORT)
366			return;
367			r.l = r.d = 0;
368	greg	1.14	r.r = hresolu; r.u = vresolu;
369	greg	1.1	p = findrect(x, y, &ptrunk, &r, -1);
370			} else {
371			if (cp == '=') { / absolute setting */
372			p = NULL;
373			e = 1.0/exposure;
374			for (cp++; isspace(*cp); cp++)
375			;
376			if (cp == '\0') { / interactive */
377	greg	2.15	sprintf(buf, "exposure (%f): ", exposure);
378	greg	1.1	(*dev->comout)(buf);
379	greg	1.18	(*dev->comin)(buf, NULL);
380	greg	1.1	for (cp = buf; isspace(*cp); cp++)
381			;
382			if (*cp == '\0')
383			return;
384			}
385			}
386			if (cp == '+' \|\| cp == '-') /* f-stops */
387			e *= pow(2.0, atof(cp));
388			else /* multiplier */
389			e *= atof(cp);
390			}
391			if (p != NULL) { /* relative setting */
392	greg	2.14	if (bright(p->v) < 1e-15) {
393	greg	1.1	error(COMMAND, "cannot normalize to zero");
394			return;
395			}
396	greg	2.16	if (adapt)
397			e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure;
398			else
399			e *= 0.5 / bright(p->v);
400	greg	1.1	}
401			if (e <= FTINY \|\| fabs(1.0 - e) <= FTINY)
402			return;
403			scalepict(&ptrunk, e);
404			exposure *= e;
405			redraw();
406			}
407
408
409	greg	1.24	getparam(str, dsc, typ, ptr) /* get variable from user */
410			char str, dsc;
411			int typ;
412			register union {int i; double d; COLOR C;} *ptr;
413			{
414	greg	1.25	extern char *index();
415	greg	1.24	int i0;
416			double d0, d1, d2;
417			char buf[48];
418
419			switch (typ) {
420			case 'i': /* integer */
421			if (sscanf(str, "%d", &i0) != 1) {
422			(*dev->comout)(dsc);
423			sprintf(buf, " (%d): ", ptr->i);
424			(*dev->comout)(buf);
425			(*dev->comin)(buf, NULL);
426			if (sscanf(buf, "%d", &i0) != 1)
427	greg	1.31	return(0);
428	greg	1.24	}
429			ptr->i = i0;
430	greg	1.31	return(1);
431	greg	1.24	case 'r': /* real */
432			if (sscanf(str, "%lf", &d0) != 1) {
433			(*dev->comout)(dsc);
434			sprintf(buf, " (%.6g): ", ptr->d);
435			(*dev->comout)(buf);
436			(*dev->comin)(buf, NULL);
437			if (sscanf(buf, "%lf", &d0) != 1)
438	greg	1.31	return(0);
439	greg	1.24	}
440			ptr->d = d0;
441	greg	1.31	return(1);
442	greg	1.24	case 'b': /* boolean */
443			if (sscanf(str, "%1s", buf) != 1) {
444			(*dev->comout)(dsc);
445	greg	2.2	sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n');
446	greg	1.24	(*dev->comout)(buf);
447			(*dev->comin)(buf, NULL);
448	greg	1.25	if (buf[0] == '\0' \|\|
449			index("yY+1tTnN-0fF", buf[0]) == NULL)
450	greg	1.31	return(0);
451	greg	1.24	}
452	greg	1.25	ptr->i = index("yY+1tT", buf[0]) != NULL;
453	greg	1.31	return(1);
454	greg	1.24	case 'C': /* color */
455			if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
456			(*dev->comout)(dsc);
457			sprintf(buf, " (%.6g %.6g %.6g): ",
458			colval(ptr->C,RED),
459			colval(ptr->C,GRN),
460			colval(ptr->C,BLU));
461			(*dev->comout)(buf);
462			(*dev->comin)(buf, NULL);
463			if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
464	greg	1.31	return(0);
465	greg	1.24	}
466			setcolor(ptr->C, d0, d1, d2);
467	greg	1.31	return(1);
468	greg	1.24	}
469			}
470
471
472	greg	1.1	setparam(s) /* get/set program parameter */
473			register char *s;
474			{
475			extern int psample;
476			extern double maxdiff;
477			extern double minweight;
478			extern int maxdepth;
479			extern double dstrsrc;
480	greg	1.5	extern double shadthresh;
481	greg	1.9	extern double shadcert;
482	greg	1.1	extern COLOR ambval;
483			extern double ambacc;
484			extern int ambres;
485			extern int ambdiv;
486			extern int ambssamp;
487			extern int ambounce;
488	greg	2.13	extern int directvis;
489	greg	1.30	extern double srcsizerat;
490	greg	1.23	extern int do_irrad;
491	greg	2.5	extern double specjitter;
492			extern double specthresh;
493	greg	1.24	char buf[128];
494	greg	1.1
495			if (s[0] == '\0') {
496	greg	1.23	(*dev->comout)(
497	greg	2.5	"aa ab ad ar as av b dc di dj ds dt i lr lw ps pt sj st: ");
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	1.24	getparam(s+2, "limit weight", 'r', &minweight);
506	greg	1.1	break;
507			case 'r': /* reflection */
508	greg	1.24	getparam(s+2, "limit reflection", 'i', &maxdepth);
509	greg	1.1	break;
510			default:
511			goto badparam;
512			}
513			break;
514	greg	1.5	case 'd': /* direct */
515			switch (s[1]) {
516			case 'j': /* jitter */
517	greg	1.24	getparam(s+2, "direct jitter", 'r', &dstrsrc);
518	greg	1.9	break;
519			case 'c': /* certainty */
520	greg	1.24	getparam(s+2, "direct certainty", 'r', &shadcert);
521	greg	1.5	break;
522	greg	1.8	case 't': /* threshold */
523	greg	1.24	getparam(s+2, "direct threshold", 'r', &shadthresh);
524	greg	1.5	break;
525	greg	2.13	case 'v': /* visibility */
526			getparam(s+2, "direct visibility",
527			'b', &directvis);
528	greg	1.30	break;
529			case 's': /* sampling */
530			getparam(s+2, "direct sampling", 'r', &srcsizerat);
531	greg	1.23	break;
532	greg	1.5	default:
533	greg	1.1	goto badparam;
534			}
535	greg	1.23	break;
536			case 'b': /* black and white */
537	greg	1.24	getparam(s+1, "black and white", 'b', &greyscale);
538	greg	1.23	break;
539			case 'i': /* irradiance */
540	greg	1.24	getparam(s+1, "irradiance", 'b', &do_irrad);
541	greg	1.1	break;
542			case 'a': /* ambient */
543			switch (s[1]) {
544			case 'v': /* value */
545	greg	2.11	getparam(s+2, "ambient value", 'C', (COLOR *)ambval);
546	greg	1.1	break;
547			case 'a': /* accuracy */
548	greg	2.17	if (getparam(s+2, "ambient accuracy", 'r', &ambacc))
549			setambacc(ambacc);
550	greg	1.1	break;
551			case 'd': /* divisions */
552	greg	1.24	getparam(s+2, "ambient divisions", 'i', &ambdiv);
553	greg	1.1	break;
554			case 's': /* samples */
555	greg	1.24	getparam(s+2, "ambient super-samples", 'i', &ambssamp);
556	greg	1.1	break;
557			case 'b': /* bounces */
558	greg	1.24	getparam(s+2, "ambient bounces", 'i', &ambounce);
559	greg	1.1	break;
560			case 'r':
561	greg	1.31	if (getparam(s+2, "ambient resolution", 'i', &ambres))
562	greg	2.8	setambres(ambres);
563	greg	1.1	break;
564			default:
565			goto badparam;
566			}
567			break;
568	greg	2.5	case 'p': /* pixel */
569	greg	1.1	switch (s[1]) {
570	greg	2.5	case 's': /* sample */
571			if (getparam(s+2, "pixel sample", 'i', &psample))
572	greg	1.31	pdepth = 0;
573	greg	1.1	break;
574	greg	1.8	case 't': /* threshold */
575	greg	2.5	if (getparam(s+2, "pixel threshold", 'r', &maxdiff))
576	greg	1.31	pdepth = 0;
577	greg	2.5	break;
578			default:
579			goto badparam;
580			}
581			break;
582			case 's': /* specular */
583			switch (s[1]) {
584			case 'j': /* jitter */
585			getparam(s+2, "specular jitter", 'r', &specjitter);
586			break;
587			case 't': /* threshold */
588			getparam(s+2, "specular threshold", 'r', &specthresh);
589	greg	1.1	break;
590			default:
591			goto badparam;
592			}
593			break;
594			case '\0': /* nothing */
595			break;
596			default:;
597			badparam:
598	greg	1.26	*sskip(s) = '\0';
599	greg	1.1	sprintf(errmsg, "%s: unknown variable", s);
600			error(COMMAND, errmsg);
601			break;
602			}
603			}
604
605
606			traceray(s) /* trace a single ray */
607			char *s;
608			{
609			char buf[128];
610			int x, y;
611			RAY thisray;
612
613	greg	2.6	if (!sscanvec(s, thisray.rorg) \|\|
614			!sscanvec(sskip(sskip(sskip(s))), thisray.rdir)) {
615	greg	1.1
616			if (dev->getcur == NULL)
617			return;
618			(*dev->comout)("Pick ray\n");
619			if ((*dev->getcur)(&x, &y) == ABORT)
620			return;
621
622	greg	1.21	if (viewray(thisray.rorg, thisray.rdir, &ourview,
623			(x+.5)/hresolu, (y+.5)/vresolu) < 0) {
624			error(COMMAND, "not on image");
625			return;
626			}
627
628	greg	1.1	} else if (normalize(thisray.rdir) == 0.0) {
629			error(COMMAND, "zero ray direction");
630			return;
631			}
632
633			rayorigin(&thisray, NULL, PRIMARY, 1.0);
634
635			rayvalue(&thisray);
636
637			if (thisray.ro == NULL)
638			(*dev->comout)("ray hit nothing");
639			else {
640	greg	2.23	sprintf(buf, "ray hit %s%s %s \"%s\"",
641			thisray.rod < 0.0 ? "back of " : "",
642	greg	2.22	thisray.ro->omod == OVOID ? VOIDID :
643			objptr(thisray.ro->omod)->oname,
644	greg	1.1	ofun[thisray.ro->otype].funame,
645			thisray.ro->oname);
646			(*dev->comout)(buf);
647	greg	1.18	(*dev->comin)(buf, NULL);
648	greg	1.1	if (thisray.rot >= FHUGE)
649			(*dev->comout)("at infinity");
650			else {
651			sprintf(buf, "at (%.6g %.6g %.6g)", thisray.rop[0],
652			thisray.rop[1], thisray.rop[2]);
653			(*dev->comout)(buf);
654			}
655	greg	1.18	(*dev->comin)(buf, NULL);
656	greg	1.32	sprintf(buf, "value (%.5g %.5g %.5g) (%.1fL)",
657	greg	1.1	colval(thisray.rcol,RED),
658			colval(thisray.rcol,GRN),
659	greg	1.32	colval(thisray.rcol,BLU),
660			luminance(thisray.rcol));
661	greg	1.1	(*dev->comout)(buf);
662			}
663	greg	1.18	(*dev->comin)(buf, NULL);
664	greg	1.1	}
665
666
667			writepict(s) /* write the picture to a file */
668			char *s;
669			{
670			static char buf[128];
671	greg	1.10	char *fname;
672	greg	1.1	FILE *fp;
673			COLR *scanline;
674			int y;
675
676	greg	2.20	while (isspace(*s))
677			s++;
678			if (*s)
679			atos(buf, sizeof(buf), s);
680			else if (buf[0] == '\0') {
681	greg	1.1	error(COMMAND, "no file");
682			return;
683			}
684	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
685	greg	1.1	(fp = fopen(fname, "w")) == NULL) {
686			sprintf(errmsg, "cannot open \"%s\"", buf);
687			error(COMMAND, errmsg);
688			return;
689			}
690	greg	2.12	#ifdef MSDOS
691			setmode(fileno(fp), O_BINARY);
692			#endif
693	greg	1.1	(*dev->comout)("writing \"");
694			(*dev->comout)(fname);
695			(*dev->comout)("\"...\n");
696			/* write header */
697	greg	2.24	newheader("RADIANCE", fp);
698	greg	1.1	fputs(progname, fp);
699			fprintview(&ourview, fp);
700	greg	1.29	if (octname != NULL)
701			fprintf(fp, " %s\n", octname);
702			else
703			putc('\n', fp);
704	greg	1.28	fprintf(fp, "SOFTWARE= %s\n", VersionID);
705	greg	1.1	if (exposure != 1.0)
706	greg	1.13	fputexpos(exposure, fp);
707	greg	1.15	if (dev->pixaspect != 1.0)
708			fputaspect(dev->pixaspect, fp);
709	greg	1.22	fputformat(COLRFMT, fp);
710	greg	1.11	putc('\n', fp);
711	greg	1.33	fprtresolu(hresolu, vresolu, fp);
712	greg	1.1
713	greg	1.14	scanline = (COLR )malloc(hresolusizeof(COLR));
714	greg	1.27	if (scanline == NULL) {
715			error(COMMAND, "not enough memory!");
716			fclose(fp);
717			unlink(fname);
718			return;
719			}
720	greg	1.14	for (y = vresolu-1; y >= 0; y--) {
721			getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
722			if (fwritecolrs(scanline, hresolu, fp) < 0)
723	greg	1.1	break;
724			}
725	greg	1.27	free((char *)scanline);
726	greg	1.1	if (fclose(fp) < 0)
727			error(COMMAND, "write error");
728			}