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- /* Copyright (c) 1992 Regents of the University of California */
-
- #ifndef lint
- static char SCCSid[] = "@(#)rv2.c 2.12 10/15/92 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 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);
- 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 (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();
- }
-
-
- 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;
- 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) < 1e-25) {
- 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 int ambres;
- extern int ambdiv;
- extern int ambssamp;
- extern int ambounce;
- extern int directinvis;
- 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 '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', (COLOR *)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))
- 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");
- }
-