src/rt/rv2.c

/* Copyright (c) 1991 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'-'@')

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;

        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);
                fputs("\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 (sscanf(buf, "%lf %lf %lf", &nv.vp[0], &nv.vp[1], &nv.vp[2]) == 3)
                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 (sscanf(buf,"%lf %lf %lf",&nv.vdir[0],&nv.vdir[1],&nv.vdir[2]) == 3)
                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 (sscanf(buf,"%lf %lf %lf",&nv.vup[0],&nv.vup[1],&nv.vup[2]) == 3)
                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();
}


getaim(s)                               /* aim camera */
char  *s;
{
        extern double  tan(), atan();
        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;
{
        extern double  normalize(), tan(), atan();
        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;
{
        double  atof(), pow(), fabs();
        char  buf[128];
        register char  *cp;
        register PNODE  *p;
        RECT  r;
        int  x, y;
        double  e;

        for (cp = s; isspace(*cp); 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);
                e = 1.0;
        } else {
                if (*cp == '=') {       /* absolute setting */
                        p = NULL;
                        e = 1.0/exposure;
                        for (cp++; isspace(*cp); cp++)
                                ;
                        if (*cp == '\0') {      /* interactive */
                                sprintf(buf, "exposure (%lf): ", exposure);
                                (*dev->comout)(buf);
                                (*dev->comin)(buf, NULL);
                                for (cp = buf; isspace(*cp); cp++)
                                        ;
                                if (*cp == '\0')
                                        return;
                        }
                } else {                /* normalize to average */
                        p = &ptrunk;
                        e = 1.0;
                }
                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) <= FTINY) {
                        error(COMMAND, "cannot normalize to zero");
                        return;
                }
                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 double  minarad;
        extern int  ambres;
        extern int  ambdiv;
        extern int  ambssamp;
        extern int  ambounce;
        extern int  directinvis;
        extern double  srcsizerat;
        extern int  do_irrad;
        char  buf[128];
        
        if (s[0] == '\0') {
                (*dev->comout)(
                        "aa ab ad ar as av b dc di dj ds dt i lr lw sp 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 'i':                       /* invisibility */
                        getparam(s+2, "direct invisibility",
                                        'b', &directinvis);
                        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', ambval);
                        break;
                case 'a':                       /* accuracy */
                        getparam(s+2, "ambient accuracy", 'r', &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))
                                minarad = ambres > 0 ?
                                                thescene.cusize/ambres : 0.0;
                        break;
                default:
                        goto badparam;
                }
                break;
        case 's':                       /* sample */
                switch (s[1]) {
                case 'p':                       /* pixel */
                        if (getparam(s+2, "sample pixel", 'i', &psample))
                                pdepth = 0;
                        break;
                case 't':                       /* threshold */
                        if (getparam(s+2, "sample threshold", 'r', &maxdiff))
                                pdepth = 0;
                        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 (sscanf(s, "%lf %lf %lf %lf %lf %lf",
                &thisray.rorg[0], &thisray.rorg[1], &thisray.rorg[2],
                &thisray.rdir[0], &thisray.rdir[1], &thisray.rdir[2]) != 6) {

                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;
        }
        (*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:	1.33
Committed:	Mon Nov 11 17:42:19 1991 UTC (32 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.32:	+4 -2 lines
Log Message:	changed calls to viewfile() and fputresolu()
#	User	Rev	Content
1	greg	1.26	/* Copyright (c) 1991 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			#define CTRL(c) ('c'-'@')
26
27	greg	1.29	extern char VersionID[];
28	greg	1.1	extern char *progname;
29	greg	1.29	extern char *octname;
30	greg	1.1
31
32			getframe(s) /* get a new frame */
33			char *s;
34			{
35	greg	1.12	if (getrect(s, &pframe) < 0)
36	greg	1.1	return;
37			pdepth = 0;
38			}
39
40
41	greg	1.12	getrepaint(s) /* get area and repaint */
42			char *s;
43			{
44			RECT box;
45
46			if (getrect(s, &box) < 0)
47			return;
48	greg	1.14	paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
49	greg	1.12	}
50
51
52	greg	1.1	getview(s) /* get/show view parameters */
53			char *s;
54			{
55			FILE *fp;
56			char buf[128];
57	greg	1.10	char *fname;
58	greg	1.3	int change = 0;
59	greg	1.1	VIEW nv;
60
61			if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */
62	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
63	greg	1.1	(fp = fopen(fname, "a")) == NULL) {
64			sprintf(errmsg, "cannot open \"%s\"", buf);
65			error(COMMAND, errmsg);
66			return;
67			}
68	greg	1.2	fputs(progname, fp);
69	greg	1.1	fprintview(&ourview, fp);
70	greg	1.19	fputs(sskip(s), fp);
71	greg	1.1	fputs("\n", fp);
72			fclose(fp);
73			return;
74			}
75			sprintf(buf, "view type (%c): ", ourview.type);
76			(*dev->comout)(buf);
77	greg	1.18	(*dev->comin)(buf, NULL);
78	greg	1.1	if (buf[0] == CTRL(C)) return;
79	greg	1.3	if (buf[0] && buf[0] != ourview.type) {
80	greg	1.1	nv.type = buf[0];
81	greg	1.3	change++;
82			} else
83	greg	1.1	nv.type = ourview.type;
84			sprintf(buf, "view point (%.6g %.6g %.6g): ",
85			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
86			(*dev->comout)(buf);
87	greg	1.18	(*dev->comin)(buf, NULL);
88	greg	1.1	if (buf[0] == CTRL(C)) return;
89	greg	1.3	if (sscanf(buf, "%lf %lf %lf", &nv.vp[0], &nv.vp[1], &nv.vp[2]) == 3)
90			change++;
91			else
92	greg	1.1	VCOPY(nv.vp, ourview.vp);
93			sprintf(buf, "view direction (%.6g %.6g %.6g): ",
94			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
95			(*dev->comout)(buf);
96	greg	1.18	(*dev->comin)(buf, NULL);
97	greg	1.1	if (buf[0] == CTRL(C)) return;
98	greg	1.3	if (sscanf(buf,"%lf %lf %lf",&nv.vdir[0],&nv.vdir[1],&nv.vdir[2]) == 3)
99			change++;
100			else
101	greg	1.1	VCOPY(nv.vdir, ourview.vdir);
102			sprintf(buf, "view up (%.6g %.6g %.6g): ",
103			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
104			(*dev->comout)(buf);
105	greg	1.18	(*dev->comin)(buf, NULL);
106	greg	1.1	if (buf[0] == CTRL(C)) return;
107	greg	1.3	if (sscanf(buf,"%lf %lf %lf",&nv.vup[0],&nv.vup[1],&nv.vup[2]) == 3)
108			change++;
109			else
110	greg	1.1	VCOPY(nv.vup, ourview.vup);
111			sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
112			ourview.horiz, ourview.vert);
113			(*dev->comout)(buf);
114	greg	1.18	(*dev->comin)(buf, NULL);
115	greg	1.1	if (buf[0] == CTRL(C)) return;
116	greg	1.3	if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
117			change++;
118			else {
119	greg	1.1	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
120			}
121	greg	1.14	sprintf(buf, "view shift and lift (%.6g %.6g): ",
122			ourview.hoff, ourview.voff);
123	greg	1.1	(*dev->comout)(buf);
124	greg	1.18	(*dev->comin)(buf, NULL);
125	greg	1.1	if (buf[0] == CTRL(C)) return;
126	greg	1.14	if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
127	greg	1.3	change++;
128			else {
129	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
130	greg	1.1	}
131	greg	1.3	if (change)
132			newview(&nv);
133	greg	1.1	}
134
135
136			lastview(s) /* return to a previous view */
137			char *s;
138			{
139			char buf[128];
140	greg	1.10	char *fname;
141	greg	1.1	int success;
142			VIEW nv;
143
144			if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */
145	greg	1.17	copystruct(&nv, &stdview);
146	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
147	greg	1.33	(success = viewfile(fname, &nv, NULL)) == -1) {
148	greg	1.1	sprintf(errmsg, "cannot open \"%s\"", buf);
149			error(COMMAND, errmsg);
150			return;
151			}
152			if (!success)
153			error(COMMAND, "wrong file format");
154			else
155			newview(&nv);
156			return;
157			}
158	greg	1.20	if (oldview.type == 0) { /* no old view! */
159	greg	1.1	error(COMMAND, "no previous view");
160			return;
161			}
162	greg	1.17	copystruct(&nv, &ourview);
163			copystruct(&ourview, &oldview);
164			copystruct(&oldview, &nv);
165	greg	1.1	newimage();
166			}
167
168
169			getaim(s) /* aim camera */
170			char *s;
171			{
172			extern double tan(), atan();
173			double zfact;
174			VIEW nv;
175
176			if (getinterest(s, 1, nv.vdir, &zfact) < 0)
177			return;
178	greg	1.21	nv.type = ourview.type;
179	greg	1.1	VCOPY(nv.vp, ourview.vp);
180			VCOPY(nv.vup, ourview.vup);
181	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
182	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
183			zoomview(&nv, zfact);
184	greg	1.1	newview(&nv);
185			}
186
187
188			getmove(s) /* move camera */
189			char *s;
190			{
191			FVECT vc;
192			double mag;
193
194			if (getinterest(s, 0, vc, &mag) < 0)
195			return;
196	greg	1.4	moveview(0.0, 0.0, mag, vc);
197	greg	1.1	}
198
199
200			getrotate(s) /* rotate camera */
201			char *s;
202			{
203	greg	1.4	extern double normalize(), tan(), atan();
204	greg	1.1	VIEW nv;
205			FVECT v1;
206	greg	1.4	double angle, elev, zfact;
207	greg	1.1
208	greg	1.4	elev = 0.0; zfact = 1.0;
209			if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) {
210	greg	1.1	error(COMMAND, "missing angle");
211			return;
212			}
213	greg	1.21	nv.type = ourview.type;
214	greg	1.1	VCOPY(nv.vp, ourview.vp);
215			VCOPY(nv.vup, ourview.vup);
216	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
217	greg	1.1	spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
218			if (elev != 0.0) {
219			fcross(v1, nv.vdir, ourview.vup);
220			normalize(v1);
221			spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
222			}
223	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
224			zoomview(&nv, zfact);
225	greg	1.1	newview(&nv);
226			}
227
228
229			getpivot(s) /* pivot viewpoint */
230			register char *s;
231			{
232			FVECT vc;
233	greg	1.4	double angle, elev, mag;
234	greg	1.1
235	greg	1.4	elev = 0.0;
236			if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
237	greg	1.1	error(COMMAND, "missing angle");
238			return;
239			}
240	greg	1.4	if (getinterest(sskip(sskip(s)), 0, vc, &mag) < 0)
241	greg	1.1	return;
242	greg	1.4	moveview(angle, elev, mag, vc);
243	greg	1.1	}
244
245
246			getexposure(s) /* get new exposure */
247			char *s;
248			{
249			double atof(), pow(), fabs();
250			char buf[128];
251			register char *cp;
252			register PNODE *p;
253			RECT r;
254			int x, y;
255			double e;
256
257			for (cp = s; isspace(*cp); cp++)
258			;
259			if (cp == '\0') { / normalize to point */
260			if (dev->getcur == NULL)
261			return;
262			(*dev->comout)("Pick point for exposure\n");
263			if ((*dev->getcur)(&x, &y) == ABORT)
264			return;
265			r.l = r.d = 0;
266	greg	1.14	r.r = hresolu; r.u = vresolu;
267	greg	1.1	p = findrect(x, y, &ptrunk, &r, -1);
268			e = 1.0;
269			} else {
270			if (cp == '=') { / absolute setting */
271			p = NULL;
272			e = 1.0/exposure;
273			for (cp++; isspace(*cp); cp++)
274			;
275			if (cp == '\0') { / interactive */
276			sprintf(buf, "exposure (%lf): ", exposure);
277			(*dev->comout)(buf);
278	greg	1.18	(*dev->comin)(buf, NULL);
279	greg	1.1	for (cp = buf; isspace(*cp); cp++)
280			;
281			if (*cp == '\0')
282			return;
283			}
284			} else { /* normalize to average */
285			p = &ptrunk;
286			e = 1.0;
287			}
288			if (cp == '+' \|\| cp == '-') /* f-stops */
289			e *= pow(2.0, atof(cp));
290			else /* multiplier */
291			e *= atof(cp);
292			}
293			if (p != NULL) { /* relative setting */
294	greg	1.6	if (bright(p->v) <= FTINY) {
295	greg	1.1	error(COMMAND, "cannot normalize to zero");
296			return;
297			}
298	greg	1.6	e *= 0.5 / bright(p->v);
299	greg	1.1	}
300			if (e <= FTINY \|\| fabs(1.0 - e) <= FTINY)
301			return;
302			scalepict(&ptrunk, e);
303			exposure *= e;
304			redraw();
305			}
306
307
308	greg	1.24	getparam(str, dsc, typ, ptr) /* get variable from user */
309			char str, dsc;
310			int typ;
311			register union {int i; double d; COLOR C;} *ptr;
312			{
313	greg	1.25	extern char *index();
314	greg	1.24	int i0;
315			double d0, d1, d2;
316			char buf[48];
317
318			switch (typ) {
319			case 'i': /* integer */
320			if (sscanf(str, "%d", &i0) != 1) {
321			(*dev->comout)(dsc);
322			sprintf(buf, " (%d): ", ptr->i);
323			(*dev->comout)(buf);
324			(*dev->comin)(buf, NULL);
325			if (sscanf(buf, "%d", &i0) != 1)
326	greg	1.31	return(0);
327	greg	1.24	}
328			ptr->i = i0;
329	greg	1.31	return(1);
330	greg	1.24	case 'r': /* real */
331			if (sscanf(str, "%lf", &d0) != 1) {
332			(*dev->comout)(dsc);
333			sprintf(buf, " (%.6g): ", ptr->d);
334			(*dev->comout)(buf);
335			(*dev->comin)(buf, NULL);
336			if (sscanf(buf, "%lf", &d0) != 1)
337	greg	1.31	return(0);
338	greg	1.24	}
339			ptr->d = d0;
340	greg	1.31	return(1);
341	greg	1.24	case 'b': /* boolean */
342			if (sscanf(str, "%1s", buf) != 1) {
343			(*dev->comout)(dsc);
344			sprintf(buf, " (%c): ", ptr->i ? 'y' : 'n');
345			(*dev->comout)(buf);
346			(*dev->comin)(buf, NULL);
347	greg	1.25	if (buf[0] == '\0' \|\|
348			index("yY+1tTnN-0fF", buf[0]) == NULL)
349	greg	1.31	return(0);
350	greg	1.24	}
351	greg	1.25	ptr->i = index("yY+1tT", buf[0]) != NULL;
352	greg	1.31	return(1);
353	greg	1.24	case 'C': /* color */
354			if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
355			(*dev->comout)(dsc);
356			sprintf(buf, " (%.6g %.6g %.6g): ",
357			colval(ptr->C,RED),
358			colval(ptr->C,GRN),
359			colval(ptr->C,BLU));
360			(*dev->comout)(buf);
361			(*dev->comin)(buf, NULL);
362			if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
363	greg	1.31	return(0);
364	greg	1.24	}
365			setcolor(ptr->C, d0, d1, d2);
366	greg	1.31	return(1);
367	greg	1.24	}
368			}
369
370
371	greg	1.1	setparam(s) /* get/set program parameter */
372			register char *s;
373			{
374			extern int psample;
375			extern double maxdiff;
376			extern double minweight;
377			extern int maxdepth;
378			extern double dstrsrc;
379	greg	1.5	extern double shadthresh;
380	greg	1.9	extern double shadcert;
381	greg	1.1	extern COLOR ambval;
382			extern double ambacc;
383			extern double minarad;
384			extern int ambres;
385			extern int ambdiv;
386			extern int ambssamp;
387			extern int ambounce;
388	greg	1.23	extern int directinvis;
389	greg	1.30	extern double srcsizerat;
390	greg	1.23	extern int do_irrad;
391	greg	1.24	char buf[128];
392	greg	1.1
393			if (s[0] == '\0') {
394	greg	1.23	(*dev->comout)(
395	greg	1.31	"aa ab ad ar as av b dc di dj ds dt i lr lw sp st: ");
396	greg	1.18	(*dev->comin)(buf, NULL);
397	greg	1.1	s = buf;
398			}
399			switch (s[0]) {
400			case 'l': /* limit */
401			switch (s[1]) {
402			case 'w': /* weight */
403	greg	1.24	getparam(s+2, "limit weight", 'r', &minweight);
404	greg	1.1	break;
405			case 'r': /* reflection */
406	greg	1.24	getparam(s+2, "limit reflection", 'i', &maxdepth);
407	greg	1.1	break;
408			default:
409			goto badparam;
410			}
411			break;
412	greg	1.5	case 'd': /* direct */
413			switch (s[1]) {
414			case 'j': /* jitter */
415	greg	1.24	getparam(s+2, "direct jitter", 'r', &dstrsrc);
416	greg	1.9	break;
417			case 'c': /* certainty */
418	greg	1.24	getparam(s+2, "direct certainty", 'r', &shadcert);
419	greg	1.5	break;
420	greg	1.8	case 't': /* threshold */
421	greg	1.24	getparam(s+2, "direct threshold", 'r', &shadthresh);
422	greg	1.5	break;
423	greg	1.23	case 'i': /* invisibility */
424	greg	1.24	getparam(s+2, "direct invisibility",
425			'b', &directinvis);
426	greg	1.30	break;
427			case 's': /* sampling */
428			getparam(s+2, "direct sampling", 'r', &srcsizerat);
429	greg	1.23	break;
430	greg	1.5	default:
431	greg	1.1	goto badparam;
432			}
433	greg	1.23	break;
434			case 'b': /* black and white */
435	greg	1.24	getparam(s+1, "black and white", 'b', &greyscale);
436	greg	1.23	break;
437			case 'i': /* irradiance */
438	greg	1.24	getparam(s+1, "irradiance", 'b', &do_irrad);
439	greg	1.1	break;
440			case 'a': /* ambient */
441			switch (s[1]) {
442			case 'v': /* value */
443	greg	1.24	getparam(s+2, "ambient value", 'C', ambval);
444	greg	1.1	break;
445			case 'a': /* accuracy */
446	greg	1.24	getparam(s+2, "ambient accuracy", 'r', &ambacc);
447	greg	1.1	break;
448			case 'd': /* divisions */
449	greg	1.24	getparam(s+2, "ambient divisions", 'i', &ambdiv);
450	greg	1.1	break;
451			case 's': /* samples */
452	greg	1.24	getparam(s+2, "ambient super-samples", 'i', &ambssamp);
453	greg	1.1	break;
454			case 'b': /* bounces */
455	greg	1.24	getparam(s+2, "ambient bounces", 'i', &ambounce);
456	greg	1.1	break;
457			case 'r':
458	greg	1.31	if (getparam(s+2, "ambient resolution", 'i', &ambres))
459			minarad = ambres > 0 ?
460			thescene.cusize/ambres : 0.0;
461	greg	1.1	break;
462			default:
463			goto badparam;
464			}
465			break;
466			case 's': /* sample */
467			switch (s[1]) {
468			case 'p': /* pixel */
469	greg	1.31	if (getparam(s+2, "sample pixel", 'i', &psample))
470			pdepth = 0;
471	greg	1.1	break;
472	greg	1.8	case 't': /* threshold */
473	greg	1.31	if (getparam(s+2, "sample threshold", 'r', &maxdiff))
474			pdepth = 0;
475	greg	1.1	break;
476			default:
477			goto badparam;
478			}
479			break;
480			case '\0': /* nothing */
481			break;
482			default:;
483			badparam:
484	greg	1.26	*sskip(s) = '\0';
485	greg	1.1	sprintf(errmsg, "%s: unknown variable", s);
486			error(COMMAND, errmsg);
487			break;
488			}
489			}
490
491
492			traceray(s) /* trace a single ray */
493			char *s;
494			{
495			char buf[128];
496			int x, y;
497			RAY thisray;
498
499			if (sscanf(s, "%lf %lf %lf %lf %lf %lf",
500			&thisray.rorg[0], &thisray.rorg[1], &thisray.rorg[2],
501			&thisray.rdir[0], &thisray.rdir[1], &thisray.rdir[2]) != 6) {
502
503			if (dev->getcur == NULL)
504			return;
505			(*dev->comout)("Pick ray\n");
506			if ((*dev->getcur)(&x, &y) == ABORT)
507			return;
508
509	greg	1.21	if (viewray(thisray.rorg, thisray.rdir, &ourview,
510			(x+.5)/hresolu, (y+.5)/vresolu) < 0) {
511			error(COMMAND, "not on image");
512			return;
513			}
514
515	greg	1.1	} else if (normalize(thisray.rdir) == 0.0) {
516			error(COMMAND, "zero ray direction");
517			return;
518			}
519
520			rayorigin(&thisray, NULL, PRIMARY, 1.0);
521
522			rayvalue(&thisray);
523
524			if (thisray.ro == NULL)
525			(*dev->comout)("ray hit nothing");
526			else {
527			sprintf(buf, "ray hit %s %s \"%s\"",
528			objptr(thisray.ro->omod)->oname,
529			ofun[thisray.ro->otype].funame,
530			thisray.ro->oname);
531			(*dev->comout)(buf);
532	greg	1.18	(*dev->comin)(buf, NULL);
533	greg	1.1	if (thisray.rot >= FHUGE)
534			(*dev->comout)("at infinity");
535			else {
536			sprintf(buf, "at (%.6g %.6g %.6g)", thisray.rop[0],
537			thisray.rop[1], thisray.rop[2]);
538			(*dev->comout)(buf);
539			}
540	greg	1.18	(*dev->comin)(buf, NULL);
541	greg	1.32	sprintf(buf, "value (%.5g %.5g %.5g) (%.1fL)",
542	greg	1.1	colval(thisray.rcol,RED),
543			colval(thisray.rcol,GRN),
544	greg	1.32	colval(thisray.rcol,BLU),
545			luminance(thisray.rcol));
546	greg	1.1	(*dev->comout)(buf);
547			}
548	greg	1.18	(*dev->comin)(buf, NULL);
549	greg	1.1	}
550
551
552			writepict(s) /* write the picture to a file */
553			char *s;
554			{
555			static char buf[128];
556	greg	1.10	char *fname;
557	greg	1.1	FILE *fp;
558			COLR *scanline;
559			int y;
560
561			if (sscanf(s, "%s", buf) != 1 && buf[0] == '\0') {
562			error(COMMAND, "no file");
563			return;
564			}
565	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
566	greg	1.1	(fp = fopen(fname, "w")) == NULL) {
567			sprintf(errmsg, "cannot open \"%s\"", buf);
568			error(COMMAND, errmsg);
569			return;
570			}
571			(*dev->comout)("writing \"");
572			(*dev->comout)(fname);
573			(*dev->comout)("\"...\n");
574			/* write header */
575			fputs(progname, fp);
576			fprintview(&ourview, fp);
577	greg	1.29	if (octname != NULL)
578			fprintf(fp, " %s\n", octname);
579			else
580			putc('\n', fp);
581	greg	1.28	fprintf(fp, "SOFTWARE= %s\n", VersionID);
582	greg	1.1	if (exposure != 1.0)
583	greg	1.13	fputexpos(exposure, fp);
584	greg	1.15	if (dev->pixaspect != 1.0)
585			fputaspect(dev->pixaspect, fp);
586	greg	1.22	fputformat(COLRFMT, fp);
587	greg	1.11	putc('\n', fp);
588	greg	1.33	fprtresolu(hresolu, vresolu, fp);
589	greg	1.1
590	greg	1.14	scanline = (COLR )malloc(hresolusizeof(COLR));
591	greg	1.27	if (scanline == NULL) {
592			error(COMMAND, "not enough memory!");
593			fclose(fp);
594			unlink(fname);
595			return;
596			}
597	greg	1.14	for (y = vresolu-1; y >= 0; y--) {
598			getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
599			if (fwritecolrs(scanline, hresolu, fp) < 0)
600	greg	1.1	break;
601			}
602	greg	1.27	free((char *)scanline);
603	greg	1.1	if (fclose(fp) < 0)
604			error(COMMAND, "write error");
605			}