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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Display an image and watch the rays get traced. |
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* |
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#define MAXDEPTH 32 /* ridiculous ray tree depth */ |
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#ifdef SMLFLT |
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#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
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#else |
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#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
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#endif |
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char rtcom[] = "rtrace -h- -otp -fa -x 1"; |
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char xicom[] = "ximage"; |
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char xicom[] = "ximage -c 256"; |
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VIEW ourview = STDVIEW; /* view for picture */ |
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int xres, yres; |
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RESOLU ourres; /* picture resolution */ |
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char *progname; /* program name */ |
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Display *theDisplay = NULL; /* connection to server */ |
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struct node { /* ray tree node */ |
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FVECT ipt; |
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int ipt[2]; |
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struct node *sister; |
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struct node *daughter; |
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}; |
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} |
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picture = argv[argc-1]; |
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/* get the viewing parameters */ |
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if (viewfile(picture, &ourview, &xres, &yres) <= 0 || |
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if (viewfile(picture, &ourview, &ourres) <= 0 || |
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setview(&ourview) != NULL) { |
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fprintf(stderr, "%s: cannot get view from \"%s\"\n", |
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progname, picture); |
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exit(1); |
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/* loop on input */ |
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mainloop(); |
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/* close pipe and exit */ |
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pclose(pin); |
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exit(0); |
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} |
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freetree(tp) /* free a trace tree */ |
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struct node *tp; |
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{ |
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register struct node *kid; |
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register struct node *kid, *k2; |
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for (kid = tp->daughter; kid != NULL; kid = kid->sister) |
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for (kid = tp->daughter; kid != NULL; kid = k2) { |
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k2 = kid->sister; |
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freetree(kid); |
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free((char *)tp); |
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} |
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free((void *)tp); |
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} |
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strtoipt(ipt, str) /* convert string x y z to image point */ |
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FVECT ipt; |
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int ipt[2]; |
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char *str; |
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{ |
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FVECT pt; |
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FVECT im_pt, pt; |
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if (sscanf(str, "%lf %lf %lf", &pt[0], &pt[1], &pt[2]) != 3) |
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if (!sscanvec(str, pt)) |
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return(-1); |
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viewloc(ipt, &ourview, pt); |
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if (DOT(pt,pt) <= FTINY) /* origin is really infinity */ |
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ipt[0] = ipt[1] = -1; /* null vector */ |
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else { |
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viewloc(im_pt, &ourview, pt); |
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loc2pix(ipt, &ourres, im_pt[0], im_pt[1]); |
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} |
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return(0); |
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} |
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setvec(ipt) /* set up vector drawing for pick */ |
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double ipt[2]; |
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int ipt[2]; |
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{ |
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extern Window xfindwind(); |
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XWindowAttributes wa; |
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XColor xc; |
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XGCValues gcv; |
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Window rw, cw; |
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unsigned int pm; |
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/* compute pointer location */ |
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if (gwind == 0 && |
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(gwind = xfindwind(theDisplay, rwind, picture, 2)) == 0) { |
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fprintf(stderr, "%s: cannot find display window!\n", progname); |
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exit(1); |
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if (gwind == 0) { |
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register char *wn; |
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for (wn = picture; *wn; wn++); |
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while (wn > picture && wn[-1] != '/') wn--; |
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if ((gwind = xfindwind(theDisplay, rwind, wn, 4)) == 0) { |
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fprintf(stderr, "%s: cannot find display window!\n", |
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progname); |
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exit(1); |
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} |
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} |
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XQueryPointer(theDisplay, gwind, &rw, &cw, &rx, &ry, &wx, &wy, &pm); |
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xoff = wx - ipt[0]*xres; |
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yoff = wy - (1.-ipt[1])*yres; |
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xoff = wx - ipt[0]; |
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yoff = wy - ipt[1]; |
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/* set graphics context */ |
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if (vecGC == 0) { |
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XGetWindowAttributes(theDisplay, gwind, &wa); |
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vector(ip1, ip2) /* draw a vector */ |
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double ip1[2], ip2[2]; |
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int ip1[2], ip2[2]; |
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{ |
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if (ip2[0] == -1 && ip2[1] == -1) |
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return; /* null vector */ |
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XDrawLine(theDisplay, gwind, vecGC, |
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(int)(ip1[0]*xres)+xoff, (int)((1.-ip1[1])*yres)+yoff, |
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(int)(ip2[0]*xres)+xoff, (int)((1.-ip2[1])*yres)+yoff); |
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ip1[0]+xoff, ip1[1]+yoff, |
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ip2[0]+xoff, ip2[1]+yoff); |
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if (slow) { |
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XFlush(theDisplay); |
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sleep(1); |
