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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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#endif |
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#include "color.h" |
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#include "resolu.h" |
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|
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#ifndef BSD |
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#define vfork fork |
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#endif |
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VIEW theirview = STDVIEW; /* input view */ |
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int gotview; /* got input view? */ |
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int thresolu, tvresolu; /* input resolution */ |
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int wrongformat = 0; /* input in another format? */ |
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RESOLU tresolu; /* input resolution */ |
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double theirexp; /* input picture exposure */ |
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double theirs2ours[4][4]; /* transformation matrix */ |
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int hasmatrix = 0; /* has transformation matrix */ |
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|
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int childpid = -1; /* id of fill process */ |
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FILE *psend, *precv; /* pipes to/from fill calculation */ |
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fputaspect(pixaspect, stdout); |
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if (ourexp > 0 && (ourexp < .995 || ourexp > 1.005)) |
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fputexpos(ourexp, stdout); |
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fputformat(COLRFMT, stdout); |
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putc('\n', stdout); |
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/* write picture */ |
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writepicture(); |
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{ |
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static char *altname[] = {VIEWSTR,"rpict","rview","pinterp",NULL}; |
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register char **an; |
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char fmt[32]; |
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if (isformat(s)) { |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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return; |
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} |
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putc('\t', stdout); |
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fputs(s, stdout); |
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theirexp = 1.0; |
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gotview = 0; |
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printf("%s:\n", pfile); |
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getheader(pfp, headline); |
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if (!gotview || fgetresolu(&thresolu, &tvresolu, pfp) |
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!= (YMAJOR|YDECR)) { |
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fprintf(stderr, "%s: picture view error\n", pfile); |
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getheader(pfp, headline, NULL); |
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if (wrongformat || !gotview || !fgetsresolu(&tresolu, pfp)) { |
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fprintf(stderr, "%s: picture format error\n", pfile); |
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exit(1); |
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} |
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if (ourexp <= 0) |
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exit(1); |
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} |
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/* compute transformation */ |
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pixform(theirs2ours, &theirview, &ourview); |
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hasmatrix = pixform(theirs2ours, &theirview, &ourview); |
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/* allocate scanlines */ |
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scanin = (COLR *)malloc(thresolu*sizeof(COLR)); |
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zin = (float *)malloc(thresolu*sizeof(float)); |
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plast = (struct position *)calloc(thresolu, sizeof(struct position)); |
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scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR)); |
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zin = (float *)malloc(scanlen(&tresolu)*sizeof(float)); |
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plast = (struct position *)calloc(scanlen(&tresolu), |
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sizeof(struct position)); |
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if (scanin == NULL || zin == NULL || plast == NULL) |
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syserror(); |
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/* get z specification or file */ |
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perror(zspec); |
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exit(1); |
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} |
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for (x = 0; x < thresolu; x++) |
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for (x = scanlen(&tresolu); x-- > 0; ) |
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zin[x] = zvalue; |
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} |
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/* load image */ |
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for (y = tvresolu-1; y >= 0; y--) { |
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if (freadcolrs(scanin, thresolu, pfp) < 0) { |
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for (y = 0; y < numscans(&tresolu); y++) { |
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if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) { |
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fprintf(stderr, "%s: read error\n", pfile); |
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exit(1); |
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} |
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if (zfd != -1 && read(zfd,(char *)zin,thresolu*sizeof(float)) |
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< thresolu*sizeof(float)) { |
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if (zfd != -1 && read(zfd,(char *)zin, |
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scanlen(&tresolu)*sizeof(float)) |
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< scanlen(&tresolu)*sizeof(float)) { |
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fprintf(stderr, "%s: read error\n", zspec); |
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exit(1); |
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} |
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{ |
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double m4t[4][4]; |
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if (vw1->type != VT_PER && vw1->type != VT_PAR) |
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return(0); |
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if (vw2->type != VT_PER && vw2->type != VT_PAR) |
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return(0); |
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setident4(xfmat); |
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xfmat[0][0] = vw1->hvec[0]; |
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xfmat[0][1] = vw1->hvec[1]; |
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m4t[2][2] = vw2->vdir[2]; |
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m4t[3][2] = -DOT(vw2->vp,vw2->vdir); |
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multmat4(xfmat, xfmat, m4t); |
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return(1); |
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} |
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struct position *lasty; /* input/output */ |
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{ |
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extern double sqrt(); |
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double pos[3]; |
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FVECT pos; |
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struct position lastx, newpos; |
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register int x; |
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lastx.z = 0; |
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for (x = thresolu-1; x >= 0; x--) { |
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pos[0] = (x+.5)/thresolu + theirview.hoff - .5; |
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pos[1] = (y+.5)/tvresolu + theirview.voff - .5; |
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for (x = scanlen(&tresolu); x-- > 0; ) { |
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pix2loc(pos, &tresolu, x, y); |
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pos[2] = zline[x]; |
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if (theirview.type == VT_PER) { |
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if (normdist) /* adjust for eye-ray distance */ |
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pos[2] /= sqrt( 1. |
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+ pos[0]*pos[0]*theirview.hn2 |
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+ pos[1]*pos[1]*theirview.vn2 ); |
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pos[0] *= pos[2]; |
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pos[1] *= pos[2]; |
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} |
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multp3(pos, pos, theirs2ours); |
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if (pos[2] <= 0) { |
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if (movepixel(pos) < 0) { |
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lasty[x].z = lastx.z = 0; /* mark invalid */ |
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continue; |
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} |
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if (ourview.type == VT_PER) { |
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pos[0] /= pos[2]; |
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pos[1] /= pos[2]; |
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} |
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pos[0] += .5 - ourview.hoff; |
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pos[1] += .5 - ourview.voff; |
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newpos.x = pos[0] * hresolu; |
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newpos.y = pos[1] * vresolu; |
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newpos.z = zline[x]; |
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} |
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movepixel(pos) /* reposition image point */ |
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FVECT pos; |
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{ |
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FVECT pt, direc; |
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|
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if (pos[2] <= 0) /* empty pixel */ |
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return(-1); |
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if (hasmatrix) { |
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pos[0] += theirview.hoff - .5; |
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pos[1] += theirview.voff - .5; |
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if (theirview.type == VT_PER) { |
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if (normdist) /* adjust for eye-ray distance */ |
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pos[2] /= sqrt( 1. |
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+ pos[0]*pos[0]*theirview.hn2 |
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+ pos[1]*pos[1]*theirview.vn2 ); |
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pos[0] *= pos[2]; |
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pos[1] *= pos[2]; |
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} |
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multp3(pos, pos, theirs2ours); |
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if (pos[2] <= 0) |
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return(-1); |
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if (ourview.type == VT_PER) { |
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pos[0] /= pos[2]; |
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pos[1] /= pos[2]; |
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} |
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pos[0] += .5 - ourview.hoff; |
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pos[1] += .5 - ourview.voff; |
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return(0); |
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} |
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if (viewray(pt, direc, &theirview, pos[0], pos[1]) < 0) |
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return(-1); |
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pt[0] += direc[0]*pos[2]; |
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pt[1] += direc[1]*pos[2]; |
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pt[2] += direc[2]*pos[2]; |
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viewloc(pos, &ourview, pt); |
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if (pos[2] <= 0) |
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return(-1); |
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return(0); |
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} |
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backpicture(fill, samp) /* background fill algorithm */ |
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int (*fill)(); |
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int samp; |
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{ |
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int *yback, xback; |
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int y; |
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COLR pfill; |
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register int x, i; |
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/* get back buffer */ |
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yback = (int *)malloc(hresolu*sizeof(int)); |
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{ |
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int y; |
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fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
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fprtresolu(hresolu, vresolu, stdout); |
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for (y = vresolu-1; y >= 0; y--) |
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if (fwritecolrs(pscan(y), hresolu, stdout) < 0) |
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syserror(); |
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if (donorm) { |
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double vx, yzn2; |
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register int x; |
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yzn2 = y - .5*(vresolu-1); |
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yzn2 = (y+.5)/vresolu + ourview.voff - .5; |
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yzn2 = 1. + yzn2*yzn2*ourview.vn2; |
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for (x = 0; x < hresolu; x++) { |
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vx = x - .5*(hresolu-1); |
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vx = (x+.5)/hresolu + ourview.hoff - .5; |
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zout[x] = zscan(y)[x] |
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* sqrt(vx*vx*ourview.hn2 + yzn2); |
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} |