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 char  rifname[];                 /* 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, NULL, 0)) == 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))
                s = sskip(s);
        if (sscanf(s, "%s", rifname) != 1 && 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 (sscanf(s, "%s", rifname) != 1 && rifname[0] == '\0') {
                error(COMMAND, "no previous rad file");
                return;
        }
        fname = getpath(rifname, NULL, 0);
        if (fname == NULL || access(fname, R_OK) == -1) {
                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;
start:
        for (cp = s; isspace(*cp); cp++)
                ;
        if (*cp == '@') {
                adapt++;
                goto start;
        }
        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\"",
                                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;

        if (sscanf(s, "%s", buf) != 1 && 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 */
        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:	2.18
Committed:	Wed Aug 25 14:13:51 1993 UTC (30 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.17:	+71 -1 lines
Log Message:	added L and V commands
#	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	2.18	extern char rifname[]; /* rad input file name */
36
37	greg	1.29	extern char VersionID[];
38	greg	1.1	extern char *progname;
39	greg	1.29	extern char *octname;
40	greg	1.1
41
42			getframe(s) /* get a new frame */
43			char *s;
44			{
45	greg	1.12	if (getrect(s, &pframe) < 0)
46	greg	1.1	return;
47			pdepth = 0;
48			}
49
50
51	greg	1.12	getrepaint(s) /* get area and repaint */
52			char *s;
53			{
54			RECT box;
55
56			if (getrect(s, &box) < 0)
57			return;
58	greg	1.14	paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
59	greg	1.12	}
60
61
62	greg	1.1	getview(s) /* get/show view parameters */
63			char *s;
64			{
65			FILE *fp;
66			char buf[128];
67	greg	1.10	char *fname;
68	greg	1.3	int change = 0;
69	greg	1.1	VIEW nv;
70
71	greg	2.9	while (isspace(*s))
72			s++;
73			if (s == '-') { / command line parameters */
74			copystruct(&nv, &ourview);
75			if (sscanview(&nv, s))
76			newview(&nv);
77			else
78			error(COMMAND, "bad view option(s)");
79			return;
80			}
81	greg	1.1	if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */
82	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
83	greg	1.1	(fp = fopen(fname, "a")) == NULL) {
84			sprintf(errmsg, "cannot open \"%s\"", buf);
85			error(COMMAND, errmsg);
86			return;
87			}
88	greg	1.2	fputs(progname, fp);
89	greg	1.1	fprintview(&ourview, fp);
90	greg	1.19	fputs(sskip(s), fp);
91	greg	2.18	putc('\n', fp);
92	greg	1.1	fclose(fp);
93			return;
94			}
95			sprintf(buf, "view type (%c): ", ourview.type);
96			(*dev->comout)(buf);
97	greg	1.18	(*dev->comin)(buf, NULL);
98	greg	2.4	if (buf[0] == CTRL('C')) return;
99	greg	1.3	if (buf[0] && buf[0] != ourview.type) {
100	greg	1.1	nv.type = buf[0];
101	greg	1.3	change++;
102			} else
103	greg	1.1	nv.type = ourview.type;
104			sprintf(buf, "view point (%.6g %.6g %.6g): ",
105			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
106			(*dev->comout)(buf);
107	greg	1.18	(*dev->comin)(buf, NULL);
108	greg	2.4	if (buf[0] == CTRL('C')) return;
109	greg	2.6	if (sscanvec(buf, nv.vp))
110	greg	1.3	change++;
111			else
112	greg	1.1	VCOPY(nv.vp, ourview.vp);
113			sprintf(buf, "view direction (%.6g %.6g %.6g): ",
114			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
115			(*dev->comout)(buf);
116	greg	1.18	(*dev->comin)(buf, NULL);
117	greg	2.4	if (buf[0] == CTRL('C')) return;
118	greg	2.6	if (sscanvec(buf, nv.vdir))
119	greg	1.3	change++;
120			else
121	greg	1.1	VCOPY(nv.vdir, ourview.vdir);
122			sprintf(buf, "view up (%.6g %.6g %.6g): ",
123			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
124			(*dev->comout)(buf);
125	greg	1.18	(*dev->comin)(buf, NULL);
126	greg	2.4	if (buf[0] == CTRL('C')) return;
127	greg	2.6	if (sscanvec(buf, nv.vup))
128	greg	1.3	change++;
129			else
130	greg	1.1	VCOPY(nv.vup, ourview.vup);
131			sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
132			ourview.horiz, ourview.vert);
133			(*dev->comout)(buf);
134	greg	1.18	(*dev->comin)(buf, NULL);
135	greg	2.4	if (buf[0] == CTRL('C')) return;
136	greg	1.3	if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
137			change++;
138			else {
139	greg	1.1	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
140			}
141	greg	1.14	sprintf(buf, "view shift and lift (%.6g %.6g): ",
142			ourview.hoff, ourview.voff);
143	greg	1.1	(*dev->comout)(buf);
144	greg	1.18	(*dev->comin)(buf, NULL);
145	greg	2.4	if (buf[0] == CTRL('C')) return;
146	greg	1.14	if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
147	greg	1.3	change++;
148			else {
149	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
150	greg	1.1	}
151	greg	1.3	if (change)
152			newview(&nv);
153	greg	1.1	}
154
155
156			lastview(s) /* return to a previous view */
157			char *s;
158			{
159			char buf[128];
160	greg	1.10	char *fname;
161	greg	1.1	int success;
162			VIEW nv;
163
164			if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */
165	greg	1.17	copystruct(&nv, &stdview);
166	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
167	greg	1.33	(success = viewfile(fname, &nv, NULL)) == -1) {
168	greg	1.1	sprintf(errmsg, "cannot open \"%s\"", buf);
169			error(COMMAND, errmsg);
170			return;
171			}
172			if (!success)
173			error(COMMAND, "wrong file format");
174			else
175			newview(&nv);
176			return;
177			}
178	greg	1.20	if (oldview.type == 0) { /* no old view! */
179	greg	1.1	error(COMMAND, "no previous view");
180			return;
181			}
182	greg	1.17	copystruct(&nv, &ourview);
183			copystruct(&ourview, &oldview);
184			copystruct(&oldview, &nv);
185	greg	1.1	newimage();
186	greg	2.18	}
187
188
189			saveview(s) /* save view to rad file */
190			char *s;
191			{
192			char view[64];
193			char *fname;
194			FILE *fp;
195
196			if (*atos(view, sizeof(view), s))
197			s = sskip(s);
198			if (sscanf(s, "%s", rifname) != 1 && rifname[0] == '\0') {
199			error(COMMAND, "no previous rad file");
200			return;
201			}
202			if ((fname = getpath(rifname, NULL, 0)) == NULL \|\|
203			(fp = fopen(fname, "a")) == NULL) {
204			sprintf(errmsg, "cannot open \"%s\"", rifname);
205			error(COMMAND, errmsg);
206			return;
207			}
208			fputs("view= ", fp);
209			fputs(view, fp);
210			fprintview(&ourview, fp);
211			putc('\n', fp);
212			fclose(fp);
213			}
214
215
216			loadview(s) /* load view from rad file */
217			char *s;
218			{
219			char buf[512];
220			char *fname;
221			FILE *fp;
222			VIEW nv;
223
224			strcpy(buf, "rad -n -s -V -v ");
225			if (sscanf(s, "%s", buf+strlen(buf)) == 1)
226			s = sskip(s);
227			else
228			strcat(buf, "1");
229			if (sscanf(s, "%s", rifname) != 1 && rifname[0] == '\0') {
230			error(COMMAND, "no previous rad file");
231			return;
232			}
233			fname = getpath(rifname, NULL, 0);
234			if (fname == NULL \|\| access(fname, R_OK) == -1) {
235			sprintf(errmsg, "cannot access \"%s\"", rifname);
236			error(COMMAND, errmsg);
237			return;
238			}
239			sprintf(buf+strlen(buf), " %s", fname);
240			if ((fp = popen(buf, "r")) == NULL) {
241			error(COMMAND, "cannot run rad");
242			return;
243			}
244			buf[0] = '\0';
245			fgets(buf, sizeof(buf), fp);
246			pclose(fp);
247			copystruct(&nv, &stdview);
248			if (!sscanview(&nv, buf)) {
249			error(COMMAND, "rad error -- no such view?");
250			return;
251			}
252			newview(&nv);
253	greg	1.1	}
254
255
256			getaim(s) /* aim camera */
257			char *s;
258			{
259			double zfact;
260			VIEW nv;
261
262			if (getinterest(s, 1, nv.vdir, &zfact) < 0)
263			return;
264	greg	1.21	nv.type = ourview.type;
265	greg	1.1	VCOPY(nv.vp, ourview.vp);
266			VCOPY(nv.vup, ourview.vup);
267	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
268	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
269			zoomview(&nv, zfact);
270	greg	1.1	newview(&nv);
271			}
272
273
274			getmove(s) /* move camera */
275			char *s;
276			{
277			FVECT vc;
278			double mag;
279
280			if (getinterest(s, 0, vc, &mag) < 0)
281			return;
282	greg	1.4	moveview(0.0, 0.0, mag, vc);
283	greg	1.1	}
284
285
286			getrotate(s) /* rotate camera */
287			char *s;
288			{
289			VIEW nv;
290			FVECT v1;
291	greg	1.4	double angle, elev, zfact;
292	greg	1.1
293	greg	1.4	elev = 0.0; zfact = 1.0;
294			if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) {
295	greg	1.1	error(COMMAND, "missing angle");
296			return;
297			}
298	greg	1.21	nv.type = ourview.type;
299	greg	1.1	VCOPY(nv.vp, ourview.vp);
300			VCOPY(nv.vup, ourview.vup);
301	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
302	greg	1.1	spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
303			if (elev != 0.0) {
304			fcross(v1, nv.vdir, ourview.vup);
305			normalize(v1);
306			spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
307			}
308	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
309			zoomview(&nv, zfact);
310	greg	1.1	newview(&nv);
311			}
312
313
314			getpivot(s) /* pivot viewpoint */
315			register char *s;
316			{
317			FVECT vc;
318	greg	1.4	double angle, elev, mag;
319	greg	1.1
320	greg	1.4	elev = 0.0;
321			if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
322	greg	1.1	error(COMMAND, "missing angle");
323			return;
324			}
325	greg	1.4	if (getinterest(sskip(sskip(s)), 0, vc, &mag) < 0)
326	greg	1.1	return;
327	greg	1.4	moveview(angle, elev, mag, vc);
328	greg	1.1	}
329
330
331			getexposure(s) /* get new exposure */
332			char *s;
333			{
334			char buf[128];
335			register char *cp;
336			RECT r;
337			int x, y;
338	greg	2.16	register PNODE *p = &ptrunk;
339			int adapt = 0;
340			double e = 1.0;
341			start:
342	greg	1.1	for (cp = s; isspace(*cp); cp++)
343			;
344	greg	2.16	if (*cp == '@') {
345			adapt++;
346			goto start;
347			}
348	greg	1.1	if (cp == '\0') { / normalize to point */
349			if (dev->getcur == NULL)
350			return;
351			(*dev->comout)("Pick point for exposure\n");
352			if ((*dev->getcur)(&x, &y) == ABORT)
353			return;
354			r.l = r.d = 0;
355	greg	1.14	r.r = hresolu; r.u = vresolu;
356	greg	1.1	p = findrect(x, y, &ptrunk, &r, -1);
357			} else {
358			if (cp == '=') { / absolute setting */
359			p = NULL;
360			e = 1.0/exposure;
361			for (cp++; isspace(*cp); cp++)
362			;
363			if (cp == '\0') { / interactive */
364	greg	2.15	sprintf(buf, "exposure (%f): ", exposure);
365	greg	1.1	(*dev->comout)(buf);
366	greg	1.18	(*dev->comin)(buf, NULL);
367	greg	1.1	for (cp = buf; isspace(*cp); cp++)
368			;
369			if (*cp == '\0')
370			return;
371			}
372			}
373			if (cp == '+' \|\| cp == '-') /* f-stops */
374			e *= pow(2.0, atof(cp));
375			else /* multiplier */
376			e *= atof(cp);
377			}
378			if (p != NULL) { /* relative setting */
379	greg	2.14	if (bright(p->v) < 1e-15) {
380	greg	1.1	error(COMMAND, "cannot normalize to zero");
381			return;
382			}
383	greg	2.16	if (adapt)
384			e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure;
385			else
386			e *= 0.5 / bright(p->v);
387	greg	1.1	}
388			if (e <= FTINY \|\| fabs(1.0 - e) <= FTINY)
389			return;
390			scalepict(&ptrunk, e);
391			exposure *= e;
392			redraw();
393			}
394
395
396	greg	1.24	getparam(str, dsc, typ, ptr) /* get variable from user */
397			char str, dsc;
398			int typ;
399			register union {int i; double d; COLOR C;} *ptr;
400			{
401	greg	1.25	extern char *index();
402	greg	1.24	int i0;
403			double d0, d1, d2;
404			char buf[48];
405
406			switch (typ) {
407			case 'i': /* integer */
408			if (sscanf(str, "%d", &i0) != 1) {
409			(*dev->comout)(dsc);
410			sprintf(buf, " (%d): ", ptr->i);
411			(*dev->comout)(buf);
412			(*dev->comin)(buf, NULL);
413			if (sscanf(buf, "%d", &i0) != 1)
414	greg	1.31	return(0);
415	greg	1.24	}
416			ptr->i = i0;
417	greg	1.31	return(1);
418	greg	1.24	case 'r': /* real */
419			if (sscanf(str, "%lf", &d0) != 1) {
420			(*dev->comout)(dsc);
421			sprintf(buf, " (%.6g): ", ptr->d);
422			(*dev->comout)(buf);
423			(*dev->comin)(buf, NULL);
424			if (sscanf(buf, "%lf", &d0) != 1)
425	greg	1.31	return(0);
426	greg	1.24	}
427			ptr->d = d0;
428	greg	1.31	return(1);
429	greg	1.24	case 'b': /* boolean */
430			if (sscanf(str, "%1s", buf) != 1) {
431			(*dev->comout)(dsc);
432	greg	2.2	sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n');
433	greg	1.24	(*dev->comout)(buf);
434			(*dev->comin)(buf, NULL);
435	greg	1.25	if (buf[0] == '\0' \|\|
436			index("yY+1tTnN-0fF", buf[0]) == NULL)
437	greg	1.31	return(0);
438	greg	1.24	}
439	greg	1.25	ptr->i = index("yY+1tT", buf[0]) != NULL;
440	greg	1.31	return(1);
441	greg	1.24	case 'C': /* color */
442			if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
443			(*dev->comout)(dsc);
444			sprintf(buf, " (%.6g %.6g %.6g): ",
445			colval(ptr->C,RED),
446			colval(ptr->C,GRN),
447			colval(ptr->C,BLU));
448			(*dev->comout)(buf);
449			(*dev->comin)(buf, NULL);
450			if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
451	greg	1.31	return(0);
452	greg	1.24	}
453			setcolor(ptr->C, d0, d1, d2);
454	greg	1.31	return(1);
455	greg	1.24	}
456			}
457
458
459	greg	1.1	setparam(s) /* get/set program parameter */
460			register char *s;
461			{
462			extern int psample;
463			extern double maxdiff;
464			extern double minweight;
465			extern int maxdepth;
466			extern double dstrsrc;
467	greg	1.5	extern double shadthresh;
468	greg	1.9	extern double shadcert;
469	greg	1.1	extern COLOR ambval;
470			extern double ambacc;
471			extern int ambres;
472			extern int ambdiv;
473			extern int ambssamp;
474			extern int ambounce;
475	greg	2.13	extern int directvis;
476	greg	1.30	extern double srcsizerat;
477	greg	1.23	extern int do_irrad;
478	greg	2.5	extern double specjitter;
479			extern double specthresh;
480	greg	1.24	char buf[128];
481	greg	1.1
482			if (s[0] == '\0') {
483	greg	1.23	(*dev->comout)(
484	greg	2.5	"aa ab ad ar as av b dc di dj ds dt i lr lw ps pt sj st: ");
485	greg	1.18	(*dev->comin)(buf, NULL);
486	greg	1.1	s = buf;
487			}
488			switch (s[0]) {
489			case 'l': /* limit */
490			switch (s[1]) {
491			case 'w': /* weight */
492	greg	1.24	getparam(s+2, "limit weight", 'r', &minweight);
493	greg	1.1	break;
494			case 'r': /* reflection */
495	greg	1.24	getparam(s+2, "limit reflection", 'i', &maxdepth);
496	greg	1.1	break;
497			default:
498			goto badparam;
499			}
500			break;
501	greg	1.5	case 'd': /* direct */
502			switch (s[1]) {
503			case 'j': /* jitter */
504	greg	1.24	getparam(s+2, "direct jitter", 'r', &dstrsrc);
505	greg	1.9	break;
506			case 'c': /* certainty */
507	greg	1.24	getparam(s+2, "direct certainty", 'r', &shadcert);
508	greg	1.5	break;
509	greg	1.8	case 't': /* threshold */
510	greg	1.24	getparam(s+2, "direct threshold", 'r', &shadthresh);
511	greg	1.5	break;
512	greg	2.13	case 'v': /* visibility */
513			getparam(s+2, "direct visibility",
514			'b', &directvis);
515	greg	1.30	break;
516			case 's': /* sampling */
517			getparam(s+2, "direct sampling", 'r', &srcsizerat);
518	greg	1.23	break;
519	greg	1.5	default:
520	greg	1.1	goto badparam;
521			}
522	greg	1.23	break;
523			case 'b': /* black and white */
524	greg	1.24	getparam(s+1, "black and white", 'b', &greyscale);
525	greg	1.23	break;
526			case 'i': /* irradiance */
527	greg	1.24	getparam(s+1, "irradiance", 'b', &do_irrad);
528	greg	1.1	break;
529			case 'a': /* ambient */
530			switch (s[1]) {
531			case 'v': /* value */
532	greg	2.11	getparam(s+2, "ambient value", 'C', (COLOR *)ambval);
533	greg	1.1	break;
534			case 'a': /* accuracy */
535	greg	2.17	if (getparam(s+2, "ambient accuracy", 'r', &ambacc))
536			setambacc(ambacc);
537	greg	1.1	break;
538			case 'd': /* divisions */
539	greg	1.24	getparam(s+2, "ambient divisions", 'i', &ambdiv);
540	greg	1.1	break;
541			case 's': /* samples */
542	greg	1.24	getparam(s+2, "ambient super-samples", 'i', &ambssamp);
543	greg	1.1	break;
544			case 'b': /* bounces */
545	greg	1.24	getparam(s+2, "ambient bounces", 'i', &ambounce);
546	greg	1.1	break;
547			case 'r':
548	greg	1.31	if (getparam(s+2, "ambient resolution", 'i', &ambres))
549	greg	2.8	setambres(ambres);
550	greg	1.1	break;
551			default:
552			goto badparam;
553			}
554			break;
555	greg	2.5	case 'p': /* pixel */
556	greg	1.1	switch (s[1]) {
557	greg	2.5	case 's': /* sample */
558			if (getparam(s+2, "pixel sample", 'i', &psample))
559	greg	1.31	pdepth = 0;
560	greg	1.1	break;
561	greg	1.8	case 't': /* threshold */
562	greg	2.5	if (getparam(s+2, "pixel threshold", 'r', &maxdiff))
563	greg	1.31	pdepth = 0;
564	greg	2.5	break;
565			default:
566			goto badparam;
567			}
568			break;
569			case 's': /* specular */
570			switch (s[1]) {
571			case 'j': /* jitter */
572			getparam(s+2, "specular jitter", 'r', &specjitter);
573			break;
574			case 't': /* threshold */
575			getparam(s+2, "specular threshold", 'r', &specthresh);
576	greg	1.1	break;
577			default:
578			goto badparam;
579			}
580			break;
581			case '\0': /* nothing */
582			break;
583			default:;
584			badparam:
585	greg	1.26	*sskip(s) = '\0';
586	greg	1.1	sprintf(errmsg, "%s: unknown variable", s);
587			error(COMMAND, errmsg);
588			break;
589			}
590			}
591
592
593			traceray(s) /* trace a single ray */
594			char *s;
595			{
596			char buf[128];
597			int x, y;
598			RAY thisray;
599
600	greg	2.6	if (!sscanvec(s, thisray.rorg) \|\|
601			!sscanvec(sskip(sskip(sskip(s))), thisray.rdir)) {
602	greg	1.1
603			if (dev->getcur == NULL)
604			return;
605			(*dev->comout)("Pick ray\n");
606			if ((*dev->getcur)(&x, &y) == ABORT)
607			return;
608
609	greg	1.21	if (viewray(thisray.rorg, thisray.rdir, &ourview,
610			(x+.5)/hresolu, (y+.5)/vresolu) < 0) {
611			error(COMMAND, "not on image");
612			return;
613			}
614
615	greg	1.1	} else if (normalize(thisray.rdir) == 0.0) {
616			error(COMMAND, "zero ray direction");
617			return;
618			}
619
620			rayorigin(&thisray, NULL, PRIMARY, 1.0);
621
622			rayvalue(&thisray);
623
624			if (thisray.ro == NULL)
625			(*dev->comout)("ray hit nothing");
626			else {
627			sprintf(buf, "ray hit %s %s \"%s\"",
628			objptr(thisray.ro->omod)->oname,
629			ofun[thisray.ro->otype].funame,
630			thisray.ro->oname);
631			(*dev->comout)(buf);
632	greg	1.18	(*dev->comin)(buf, NULL);
633	greg	1.1	if (thisray.rot >= FHUGE)
634			(*dev->comout)("at infinity");
635			else {
636			sprintf(buf, "at (%.6g %.6g %.6g)", thisray.rop[0],
637			thisray.rop[1], thisray.rop[2]);
638			(*dev->comout)(buf);
639			}
640	greg	1.18	(*dev->comin)(buf, NULL);
641	greg	1.32	sprintf(buf, "value (%.5g %.5g %.5g) (%.1fL)",
642	greg	1.1	colval(thisray.rcol,RED),
643			colval(thisray.rcol,GRN),
644	greg	1.32	colval(thisray.rcol,BLU),
645			luminance(thisray.rcol));
646	greg	1.1	(*dev->comout)(buf);
647			}
648	greg	1.18	(*dev->comin)(buf, NULL);
649	greg	1.1	}
650
651
652			writepict(s) /* write the picture to a file */
653			char *s;
654			{
655			static char buf[128];
656	greg	1.10	char *fname;
657	greg	1.1	FILE *fp;
658			COLR *scanline;
659			int y;
660
661			if (sscanf(s, "%s", buf) != 1 && buf[0] == '\0') {
662			error(COMMAND, "no file");
663			return;
664			}
665	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
666	greg	1.1	(fp = fopen(fname, "w")) == NULL) {
667			sprintf(errmsg, "cannot open \"%s\"", buf);
668			error(COMMAND, errmsg);
669			return;
670			}
671	greg	2.12	#ifdef MSDOS
672			setmode(fileno(fp), O_BINARY);
673			#endif
674	greg	1.1	(*dev->comout)("writing \"");
675			(*dev->comout)(fname);
676			(*dev->comout)("\"...\n");
677			/* write header */
678			fputs(progname, fp);
679			fprintview(&ourview, fp);
680	greg	1.29	if (octname != NULL)
681			fprintf(fp, " %s\n", octname);
682			else
683			putc('\n', fp);
684	greg	1.28	fprintf(fp, "SOFTWARE= %s\n", VersionID);
685	greg	1.1	if (exposure != 1.0)
686	greg	1.13	fputexpos(exposure, fp);
687	greg	1.15	if (dev->pixaspect != 1.0)
688			fputaspect(dev->pixaspect, fp);
689	greg	1.22	fputformat(COLRFMT, fp);
690	greg	1.11	putc('\n', fp);
691	greg	1.33	fprtresolu(hresolu, vresolu, fp);
692	greg	1.1
693	greg	1.14	scanline = (COLR )malloc(hresolusizeof(COLR));
694	greg	1.27	if (scanline == NULL) {
695			error(COMMAND, "not enough memory!");
696			fclose(fp);
697			unlink(fname);
698			return;
699			}
700	greg	1.14	for (y = vresolu-1; y >= 0; y--) {
701			getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
702			if (fwritecolrs(scanline, hresolu, fp) < 0)
703	greg	1.1	break;
704			}
705	greg	1.27	free((char *)scanline);
706	greg	1.1	if (fclose(fp) < 0)
707			error(COMMAND, "write error");
708			}