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  <ctype.h>

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

extern char  *progname;


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, 0, 0)) == -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)
                                break;
                }
                ptr->i = i0;
                break;
        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)
                                break;
                }
                ptr->d = d0;
                break;
        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)
                                break;
                }
                ptr->i = index("yY+1tT", buf[0]) != NULL;
                break;
        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)
                                break;
                }
                setcolor(ptr->C, d0, d1, d2);
                break;
        }
}


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 int  do_irrad;
        char  buf[128];
        
        if (s[0] == '\0') {
                (*dev->comout)(
                        "aa ab ad ar as av b dc di dj 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;
                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':
                        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 */
                        getparam(s+2, "sample pixel", 'i', &psample);
                        pdepth = 0;
                        break;
                case 't':                       /* threshold */
                        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, "with value (%.6g %.6g %.6g)",
                                colval(thisray.rcol,RED),
                                colval(thisray.rcol,GRN),
                                colval(thisray.rcol,BLU));
                (*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);
        putc('\n', fp);
        if (exposure != 1.0)
                fputexpos(exposure, fp);
        if (dev->pixaspect != 1.0)
                fputaspect(dev->pixaspect, fp);
        fputformat(COLRFMT, fp);
        putc('\n', fp);
        fputresolu(YMAJOR|YDECR, 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:	1.27
Committed:	Mon Aug 26 12:53:21 1991 UTC (34 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.26:	+7 -3 lines
Log Message:	improved memory handing
#	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			#include <ctype.h>
22
23			#define CTRL(c) ('c'-'@')
24
25			extern char *progname;
26
27
28			getframe(s) /* get a new frame */
29			char *s;
30			{
31	greg	1.12	if (getrect(s, &pframe) < 0)
32	greg	1.1	return;
33			pdepth = 0;
34			}
35
36
37	greg	1.12	getrepaint(s) /* get area and repaint */
38			char *s;
39			{
40			RECT box;
41
42			if (getrect(s, &box) < 0)
43			return;
44	greg	1.14	paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box);
45	greg	1.12	}
46
47
48	greg	1.1	getview(s) /* get/show view parameters */
49			char *s;
50			{
51			FILE *fp;
52			char buf[128];
53	greg	1.10	char *fname;
54	greg	1.3	int change = 0;
55	greg	1.1	VIEW nv;
56
57			if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */
58	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
59	greg	1.1	(fp = fopen(fname, "a")) == NULL) {
60			sprintf(errmsg, "cannot open \"%s\"", buf);
61			error(COMMAND, errmsg);
62			return;
63			}
64	greg	1.2	fputs(progname, fp);
65	greg	1.1	fprintview(&ourview, fp);
66	greg	1.19	fputs(sskip(s), fp);
67	greg	1.1	fputs("\n", fp);
68			fclose(fp);
69			return;
70			}
71			sprintf(buf, "view type (%c): ", ourview.type);
72			(*dev->comout)(buf);
73	greg	1.18	(*dev->comin)(buf, NULL);
74	greg	1.1	if (buf[0] == CTRL(C)) return;
75	greg	1.3	if (buf[0] && buf[0] != ourview.type) {
76	greg	1.1	nv.type = buf[0];
77	greg	1.3	change++;
78			} else
79	greg	1.1	nv.type = ourview.type;
80			sprintf(buf, "view point (%.6g %.6g %.6g): ",
81			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
82			(*dev->comout)(buf);
83	greg	1.18	(*dev->comin)(buf, NULL);
84	greg	1.1	if (buf[0] == CTRL(C)) return;
85	greg	1.3	if (sscanf(buf, "%lf %lf %lf", &nv.vp[0], &nv.vp[1], &nv.vp[2]) == 3)
86			change++;
87			else
88	greg	1.1	VCOPY(nv.vp, ourview.vp);
89			sprintf(buf, "view direction (%.6g %.6g %.6g): ",
90			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
91			(*dev->comout)(buf);
92	greg	1.18	(*dev->comin)(buf, NULL);
93	greg	1.1	if (buf[0] == CTRL(C)) return;
94	greg	1.3	if (sscanf(buf,"%lf %lf %lf",&nv.vdir[0],&nv.vdir[1],&nv.vdir[2]) == 3)
95			change++;
96			else
97	greg	1.1	VCOPY(nv.vdir, ourview.vdir);
98			sprintf(buf, "view up (%.6g %.6g %.6g): ",
99			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
100			(*dev->comout)(buf);
101	greg	1.18	(*dev->comin)(buf, NULL);
102	greg	1.1	if (buf[0] == CTRL(C)) return;
103	greg	1.3	if (sscanf(buf,"%lf %lf %lf",&nv.vup[0],&nv.vup[1],&nv.vup[2]) == 3)
104			change++;
105			else
106	greg	1.1	VCOPY(nv.vup, ourview.vup);
107			sprintf(buf, "view horiz and vert size (%.6g %.6g): ",
108			ourview.horiz, ourview.vert);
109			(*dev->comout)(buf);
110	greg	1.18	(*dev->comin)(buf, NULL);
111	greg	1.1	if (buf[0] == CTRL(C)) return;
112	greg	1.3	if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2)
113			change++;
114			else {
115	greg	1.1	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
116			}
117	greg	1.14	sprintf(buf, "view shift and lift (%.6g %.6g): ",
118			ourview.hoff, ourview.voff);
119	greg	1.1	(*dev->comout)(buf);
120	greg	1.18	(*dev->comin)(buf, NULL);
121	greg	1.1	if (buf[0] == CTRL(C)) return;
122	greg	1.14	if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2)
123	greg	1.3	change++;
124			else {
125	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
126	greg	1.1	}
127	greg	1.3	if (change)
128			newview(&nv);
129	greg	1.1	}
130
131
132			lastview(s) /* return to a previous view */
133			char *s;
134			{
135			char buf[128];
136	greg	1.10	char *fname;
137	greg	1.1	int success;
138			VIEW nv;
139
140			if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */
141	greg	1.17	copystruct(&nv, &stdview);
142	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
143	greg	1.16	(success = viewfile(fname, &nv, 0, 0)) == -1) {
144	greg	1.1	sprintf(errmsg, "cannot open \"%s\"", buf);
145			error(COMMAND, errmsg);
146			return;
147			}
148			if (!success)
149			error(COMMAND, "wrong file format");
150			else
151			newview(&nv);
152			return;
153			}
154	greg	1.20	if (oldview.type == 0) { /* no old view! */
155	greg	1.1	error(COMMAND, "no previous view");
156			return;
157			}
158	greg	1.17	copystruct(&nv, &ourview);
159			copystruct(&ourview, &oldview);
160			copystruct(&oldview, &nv);
161	greg	1.1	newimage();
162			}
163
164
165			getaim(s) /* aim camera */
166			char *s;
167			{
168			extern double tan(), atan();
169			double zfact;
170			VIEW nv;
171
172			if (getinterest(s, 1, nv.vdir, &zfact) < 0)
173			return;
174	greg	1.21	nv.type = ourview.type;
175	greg	1.1	VCOPY(nv.vp, ourview.vp);
176			VCOPY(nv.vup, ourview.vup);
177	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
178	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
179			zoomview(&nv, zfact);
180	greg	1.1	newview(&nv);
181			}
182
183
184			getmove(s) /* move camera */
185			char *s;
186			{
187			FVECT vc;
188			double mag;
189
190			if (getinterest(s, 0, vc, &mag) < 0)
191			return;
192	greg	1.4	moveview(0.0, 0.0, mag, vc);
193	greg	1.1	}
194
195
196			getrotate(s) /* rotate camera */
197			char *s;
198			{
199	greg	1.4	extern double normalize(), tan(), atan();
200	greg	1.1	VIEW nv;
201			FVECT v1;
202	greg	1.4	double angle, elev, zfact;
203	greg	1.1
204	greg	1.4	elev = 0.0; zfact = 1.0;
205			if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) {
206	greg	1.1	error(COMMAND, "missing angle");
207			return;
208			}
209	greg	1.21	nv.type = ourview.type;
210	greg	1.1	VCOPY(nv.vp, ourview.vp);
211			VCOPY(nv.vup, ourview.vup);
212	greg	1.14	nv.hoff = ourview.hoff; nv.voff = ourview.voff;
213	greg	1.1	spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
214			if (elev != 0.0) {
215			fcross(v1, nv.vdir, ourview.vup);
216			normalize(v1);
217			spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
218			}
219	greg	1.21	nv.horiz = ourview.horiz; nv.vert = ourview.vert;
220			zoomview(&nv, zfact);
221	greg	1.1	newview(&nv);
222			}
223
224
225			getpivot(s) /* pivot viewpoint */
226			register char *s;
227			{
228			FVECT vc;
229	greg	1.4	double angle, elev, mag;
230	greg	1.1
231	greg	1.4	elev = 0.0;
232			if (sscanf(s, "%lf %lf", &angle, &elev) < 1) {
233	greg	1.1	error(COMMAND, "missing angle");
234			return;
235			}
236	greg	1.4	if (getinterest(sskip(sskip(s)), 0, vc, &mag) < 0)
237	greg	1.1	return;
238	greg	1.4	moveview(angle, elev, mag, vc);
239	greg	1.1	}
240
241
242			getexposure(s) /* get new exposure */
243			char *s;
244			{
245			double atof(), pow(), fabs();
246			char buf[128];
247			register char *cp;
248			register PNODE *p;
249			RECT r;
250			int x, y;
251			double e;
252
253			for (cp = s; isspace(*cp); cp++)
254			;
255			if (cp == '\0') { / normalize to point */
256			if (dev->getcur == NULL)
257			return;
258			(*dev->comout)("Pick point for exposure\n");
259			if ((*dev->getcur)(&x, &y) == ABORT)
260			return;
261			r.l = r.d = 0;
262	greg	1.14	r.r = hresolu; r.u = vresolu;
263	greg	1.1	p = findrect(x, y, &ptrunk, &r, -1);
264			e = 1.0;
265			} else {
266			if (cp == '=') { / absolute setting */
267			p = NULL;
268			e = 1.0/exposure;
269			for (cp++; isspace(*cp); cp++)
270			;
271			if (cp == '\0') { / interactive */
272			sprintf(buf, "exposure (%lf): ", exposure);
273			(*dev->comout)(buf);
274	greg	1.18	(*dev->comin)(buf, NULL);
275	greg	1.1	for (cp = buf; isspace(*cp); cp++)
276			;
277			if (*cp == '\0')
278			return;
279			}
280			} else { /* normalize to average */
281			p = &ptrunk;
282			e = 1.0;
283			}
284			if (cp == '+' \|\| cp == '-') /* f-stops */
285			e *= pow(2.0, atof(cp));
286			else /* multiplier */
287			e *= atof(cp);
288			}
289			if (p != NULL) { /* relative setting */
290	greg	1.6	if (bright(p->v) <= FTINY) {
291	greg	1.1	error(COMMAND, "cannot normalize to zero");
292			return;
293			}
294	greg	1.6	e *= 0.5 / bright(p->v);
295	greg	1.1	}
296			if (e <= FTINY \|\| fabs(1.0 - e) <= FTINY)
297			return;
298			scalepict(&ptrunk, e);
299			exposure *= e;
300			redraw();
301			}
302
303
304	greg	1.24	getparam(str, dsc, typ, ptr) /* get variable from user */
305			char str, dsc;
306			int typ;
307			register union {int i; double d; COLOR C;} *ptr;
308			{
309	greg	1.25	extern char *index();
310	greg	1.24	int i0;
311			double d0, d1, d2;
312			char buf[48];
313
314			switch (typ) {
315			case 'i': /* integer */
316			if (sscanf(str, "%d", &i0) != 1) {
317			(*dev->comout)(dsc);
318			sprintf(buf, " (%d): ", ptr->i);
319			(*dev->comout)(buf);
320			(*dev->comin)(buf, NULL);
321			if (sscanf(buf, "%d", &i0) != 1)
322			break;
323			}
324			ptr->i = i0;
325			break;
326			case 'r': /* real */
327			if (sscanf(str, "%lf", &d0) != 1) {
328			(*dev->comout)(dsc);
329			sprintf(buf, " (%.6g): ", ptr->d);
330			(*dev->comout)(buf);
331			(*dev->comin)(buf, NULL);
332			if (sscanf(buf, "%lf", &d0) != 1)
333			break;
334			}
335			ptr->d = d0;
336			break;
337			case 'b': /* boolean */
338			if (sscanf(str, "%1s", buf) != 1) {
339			(*dev->comout)(dsc);
340			sprintf(buf, " (%c): ", ptr->i ? 'y' : 'n');
341			(*dev->comout)(buf);
342			(*dev->comin)(buf, NULL);
343	greg	1.25	if (buf[0] == '\0' \|\|
344			index("yY+1tTnN-0fF", buf[0]) == NULL)
345			break;
346	greg	1.24	}
347	greg	1.25	ptr->i = index("yY+1tT", buf[0]) != NULL;
348	greg	1.24	break;
349			case 'C': /* color */
350			if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) {
351			(*dev->comout)(dsc);
352			sprintf(buf, " (%.6g %.6g %.6g): ",
353			colval(ptr->C,RED),
354			colval(ptr->C,GRN),
355			colval(ptr->C,BLU));
356			(*dev->comout)(buf);
357			(*dev->comin)(buf, NULL);
358			if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3)
359			break;
360			}
361			setcolor(ptr->C, d0, d1, d2);
362			break;
363			}
364			}
365
366
367	greg	1.1	setparam(s) /* get/set program parameter */
368			register char *s;
369			{
370			extern int psample;
371			extern double maxdiff;
372			extern double minweight;
373			extern int maxdepth;
374			extern double dstrsrc;
375	greg	1.5	extern double shadthresh;
376	greg	1.9	extern double shadcert;
377	greg	1.1	extern COLOR ambval;
378			extern double ambacc;
379			extern double minarad;
380			extern int ambres;
381			extern int ambdiv;
382			extern int ambssamp;
383			extern int ambounce;
384	greg	1.23	extern int directinvis;
385			extern int do_irrad;
386	greg	1.24	char buf[128];
387	greg	1.1
388			if (s[0] == '\0') {
389	greg	1.23	(*dev->comout)(
390	greg	1.24	"aa ab ad ar as av b dc di dj dt i lr lw sp st: ");
391	greg	1.18	(*dev->comin)(buf, NULL);
392	greg	1.1	s = buf;
393			}
394			switch (s[0]) {
395			case 'l': /* limit */
396			switch (s[1]) {
397			case 'w': /* weight */
398	greg	1.24	getparam(s+2, "limit weight", 'r', &minweight);
399	greg	1.1	break;
400			case 'r': /* reflection */
401	greg	1.24	getparam(s+2, "limit reflection", 'i', &maxdepth);
402	greg	1.1	break;
403			default:
404			goto badparam;
405			}
406			break;
407	greg	1.5	case 'd': /* direct */
408			switch (s[1]) {
409			case 'j': /* jitter */
410	greg	1.24	getparam(s+2, "direct jitter", 'r', &dstrsrc);
411	greg	1.9	break;
412			case 'c': /* certainty */
413	greg	1.24	getparam(s+2, "direct certainty", 'r', &shadcert);
414	greg	1.5	break;
415	greg	1.8	case 't': /* threshold */
416	greg	1.24	getparam(s+2, "direct threshold", 'r', &shadthresh);
417	greg	1.5	break;
418	greg	1.23	case 'i': /* invisibility */
419	greg	1.24	getparam(s+2, "direct invisibility",
420			'b', &directinvis);
421	greg	1.23	break;
422	greg	1.5	default:
423	greg	1.1	goto badparam;
424			}
425	greg	1.23	break;
426			case 'b': /* black and white */
427	greg	1.24	getparam(s+1, "black and white", 'b', &greyscale);
428	greg	1.23	break;
429			case 'i': /* irradiance */
430	greg	1.24	getparam(s+1, "irradiance", 'b', &do_irrad);
431	greg	1.1	break;
432			case 'a': /* ambient */
433			switch (s[1]) {
434			case 'v': /* value */
435	greg	1.24	getparam(s+2, "ambient value", 'C', ambval);
436	greg	1.1	break;
437			case 'a': /* accuracy */
438	greg	1.24	getparam(s+2, "ambient accuracy", 'r', &ambacc);
439	greg	1.1	break;
440			case 'd': /* divisions */
441	greg	1.24	getparam(s+2, "ambient divisions", 'i', &ambdiv);
442	greg	1.1	break;
443			case 's': /* samples */
444	greg	1.24	getparam(s+2, "ambient super-samples", 'i', &ambssamp);
445	greg	1.1	break;
446			case 'b': /* bounces */
447	greg	1.24	getparam(s+2, "ambient bounces", 'i', &ambounce);
448	greg	1.1	break;
449			case 'r':
450	greg	1.24	getparam(s+2, "ambient resolution", 'i', &ambres);
451	greg	1.1	minarad = ambres > 0 ? thescene.cusize/ambres : 0.0;
452			break;
453			default:
454			goto badparam;
455			}
456			break;
457			case 's': /* sample */
458			switch (s[1]) {
459			case 'p': /* pixel */
460	greg	1.24	getparam(s+2, "sample pixel", 'i', &psample);
461	greg	1.1	pdepth = 0;
462			break;
463	greg	1.8	case 't': /* threshold */
464	greg	1.24	getparam(s+2, "sample threshold", 'r', &maxdiff);
465	greg	1.1	pdepth = 0;
466			break;
467			default:
468			goto badparam;
469			}
470			break;
471			case '\0': /* nothing */
472			break;
473			default:;
474			badparam:
475	greg	1.26	*sskip(s) = '\0';
476	greg	1.1	sprintf(errmsg, "%s: unknown variable", s);
477			error(COMMAND, errmsg);
478			break;
479			}
480			}
481
482
483			traceray(s) /* trace a single ray */
484			char *s;
485			{
486			char buf[128];
487			int x, y;
488			RAY thisray;
489
490			if (sscanf(s, "%lf %lf %lf %lf %lf %lf",
491			&thisray.rorg[0], &thisray.rorg[1], &thisray.rorg[2],
492			&thisray.rdir[0], &thisray.rdir[1], &thisray.rdir[2]) != 6) {
493
494			if (dev->getcur == NULL)
495			return;
496			(*dev->comout)("Pick ray\n");
497			if ((*dev->getcur)(&x, &y) == ABORT)
498			return;
499
500	greg	1.21	if (viewray(thisray.rorg, thisray.rdir, &ourview,
501			(x+.5)/hresolu, (y+.5)/vresolu) < 0) {
502			error(COMMAND, "not on image");
503			return;
504			}
505
506	greg	1.1	} else if (normalize(thisray.rdir) == 0.0) {
507			error(COMMAND, "zero ray direction");
508			return;
509			}
510
511			rayorigin(&thisray, NULL, PRIMARY, 1.0);
512
513			rayvalue(&thisray);
514
515			if (thisray.ro == NULL)
516			(*dev->comout)("ray hit nothing");
517			else {
518			sprintf(buf, "ray hit %s %s \"%s\"",
519			objptr(thisray.ro->omod)->oname,
520			ofun[thisray.ro->otype].funame,
521			thisray.ro->oname);
522			(*dev->comout)(buf);
523	greg	1.18	(*dev->comin)(buf, NULL);
524	greg	1.1	if (thisray.rot >= FHUGE)
525			(*dev->comout)("at infinity");
526			else {
527			sprintf(buf, "at (%.6g %.6g %.6g)", thisray.rop[0],
528			thisray.rop[1], thisray.rop[2]);
529			(*dev->comout)(buf);
530			}
531	greg	1.18	(*dev->comin)(buf, NULL);
532	greg	1.1	sprintf(buf, "with value (%.6g %.6g %.6g)",
533			colval(thisray.rcol,RED),
534			colval(thisray.rcol,GRN),
535			colval(thisray.rcol,BLU));
536			(*dev->comout)(buf);
537			}
538	greg	1.18	(*dev->comin)(buf, NULL);
539	greg	1.1	}
540
541
542			writepict(s) /* write the picture to a file */
543			char *s;
544			{
545			static char buf[128];
546	greg	1.10	char *fname;
547	greg	1.1	FILE *fp;
548			COLR *scanline;
549			int y;
550
551			if (sscanf(s, "%s", buf) != 1 && buf[0] == '\0') {
552			error(COMMAND, "no file");
553			return;
554			}
555	greg	1.10	if ((fname = getpath(buf, NULL, 0)) == NULL \|\|
556	greg	1.1	(fp = fopen(fname, "w")) == NULL) {
557			sprintf(errmsg, "cannot open \"%s\"", buf);
558			error(COMMAND, errmsg);
559			return;
560			}
561			(*dev->comout)("writing \"");
562			(*dev->comout)(fname);
563			(*dev->comout)("\"...\n");
564			/* write header */
565			fputs(progname, fp);
566			fprintview(&ourview, fp);
567	greg	1.11	putc('\n', fp);
568	greg	1.1	if (exposure != 1.0)
569	greg	1.13	fputexpos(exposure, fp);
570	greg	1.15	if (dev->pixaspect != 1.0)
571			fputaspect(dev->pixaspect, fp);
572	greg	1.22	fputformat(COLRFMT, fp);
573	greg	1.11	putc('\n', fp);
574	greg	1.14	fputresolu(YMAJOR\|YDECR, hresolu, vresolu, fp);
575	greg	1.1
576	greg	1.14	scanline = (COLR )malloc(hresolusizeof(COLR));
577	greg	1.27	if (scanline == NULL) {
578			error(COMMAND, "not enough memory!");
579			fclose(fp);
580			unlink(fname);
581			return;
582			}
583	greg	1.14	for (y = vresolu-1; y >= 0; y--) {
584			getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu);
585			if (fwritecolrs(scanline, hresolu, fp) < 0)
586	greg	1.1	break;
587			}
588	greg	1.27	free((char *)scanline);
589	greg	1.1	if (fclose(fp) < 0)
590			error(COMMAND, "write error");
591			}