| 10 |  |  | 
| 11 |  | #include "standard.h" | 
| 12 |  |  | 
| 13 | + | #include <sys/fcntl.h> | 
| 14 | + |  | 
| 15 |  | #include "view.h" | 
| 16 |  |  | 
| 17 |  | #include "color.h" | 
| 18 |  |  | 
| 19 | < | #define pscan(y)        (ourpict+(y)*ourview.hresolu) | 
| 20 | < | #define zscan(y)        (ourzbuf+(y)*ourview.hresolu) | 
| 19 | > | #ifndef BSD | 
| 20 | > | #define vfork           fork | 
| 21 | > | #endif | 
| 22 |  |  | 
| 23 | + | #define pscan(y)        (ourpict+(y)*hresolu) | 
| 24 | + | #define zscan(y)        (ourzbuf+(y)*hresolu) | 
| 25 | + |  | 
| 26 | + | #define F_FORE          1               /* fill foreground */ | 
| 27 | + | #define F_BACK          2               /* fill background */ | 
| 28 | + |  | 
| 29 | + | #define PACKSIZ         42              /* calculation packet size */ | 
| 30 | + |  | 
| 31 | + | #define RTCOM           "rtrace -h -ovl -fff -x %d %s" | 
| 32 | + |  | 
| 33 |  | #define ABS(x)          ((x)>0?(x):-(x)) | 
| 34 |  |  | 
| 35 | < | VIEW    ourview = STDVIEW(512);         /* desired view */ | 
| 35 | > | struct position {int x,y; float z;}; | 
| 36 |  |  | 
| 37 | + | VIEW    ourview = STDVIEW;              /* desired view */ | 
| 38 | + | int     hresolu = 512;                  /* horizontal resolution */ | 
| 39 | + | int     vresolu = 512;                  /* vertical resolution */ | 
| 40 | + | double  pixaspect = 1.0;                /* pixel aspect ratio */ | 
| 41 | + |  | 
| 42 |  | double  zeps = .02;                     /* allowed z epsilon */ | 
| 43 |  |  | 
| 44 |  | COLR    *ourpict;                       /* output picture */ | 
| 46 |  |  | 
| 47 |  | char    *progname; | 
| 48 |  |  | 
| 49 | < | VIEW    theirview = STDVIEW(512);       /* input view */ | 
| 50 | < | int     gotview;                        /* got input view? */ | 
| 49 | > | int     fill = F_FORE|F_BACK;           /* selected fill algorithm */ | 
| 50 | > | extern int      backfill(), rcalfill(); /* fill functions */ | 
| 51 | > | int     (*deffill)() = backfill;        /* selected fill function */ | 
| 52 | > | COLR    backcolr = BLKCOLR;             /* background color */ | 
| 53 | > | double  backz = 0.0;                    /* background z value */ | 
| 54 | > | int     normdist = 1;                   /* normalized distance? */ | 
| 55 | > | double  ourexp = -1;                    /* output picture exposure */ | 
| 56 |  |  | 
| 57 | + | VIEW    theirview = STDVIEW;            /* input view */ | 
| 58 | + | int     gotview;                        /* got input view? */ | 
| 59 | + | int     thresolu, tvresolu;             /* input resolution */ | 
| 60 | + | double  theirexp;                       /* input picture exposure */ | 
| 61 |  | double  theirs2ours[4][4];              /* transformation matrix */ | 
| 62 |  |  | 
| 63 | + | int     childpid = -1;                  /* id of fill process */ | 
| 64 | + | FILE    *psend, *precv;                 /* pipes to/from fill calculation */ | 
| 65 | + | int     queue[PACKSIZ][2];              /* pending pixels */ | 
| 66 | + | int     queuesiz;                       /* number of pixels pending */ | 
| 67 |  |  | 
| 68 | + |  | 
| 69 |  | main(argc, argv)                        /* interpolate pictures */ | 
| 70 |  | int     argc; | 
| 71 |  | char    *argv[]; | 
| 72 |  | { | 
| 73 |  | #define check(olen,narg)        if (argv[i][olen] || narg >= argc-i) goto badopt | 
| 74 | + | extern double   atof(); | 
| 75 |  | int     gotvfile = 0; | 
| 76 | + | char    *zfile = NULL; | 
| 77 |  | char    *err; | 
| 78 | < | int     i; | 
| 78 | > | int     i, rval; | 
| 79 |  |  | 
| 80 |  | progname = argv[0]; | 
| 81 |  |  | 
| 82 | < | for (i = 1; i < argc && argv[i][0] == '-'; i++) | 
| 82 | > | for (i = 1; i < argc && argv[i][0] == '-'; i++) { | 
| 83 | > | rval = getviewopt(&ourview, argc-i, argv+i); | 
| 84 | > | if (rval >= 0) { | 
| 85 | > | i += rval; | 
| 86 | > | continue; | 
| 87 | > | } | 
| 88 |  | switch (argv[i][1]) { | 
| 89 |  | case 't':                               /* threshold */ | 
| 90 |  | check(2,1); | 
| 91 |  | zeps = atof(argv[++i]); | 
| 92 |  | break; | 
| 93 | < | case 'x':                               /* x resolution */ | 
| 94 | < | check(2,1); | 
| 95 | < | ourview.hresolu = atoi(argv[++i]); | 
| 93 | > | case 'n':                               /* dist. normalized? */ | 
| 94 | > | check(2,0); | 
| 95 | > | normdist = !normdist; | 
| 96 |  | break; | 
| 97 | < | case 'y':                               /* y resolution */ | 
| 59 | < | check(2,1); | 
| 60 | < | ourview.vresolu = atoi(argv[++i]); | 
| 61 | < | break; | 
| 62 | < | case 'v':                               /* view */ | 
| 97 | > | case 'f':                               /* fill type */ | 
| 98 |  | switch (argv[i][2]) { | 
| 99 | < | case 't':                               /* type */ | 
| 100 | < | check(4,0); | 
| 101 | < | ourview.type = argv[i][3]; | 
| 99 | > | case '0':                               /* none */ | 
| 100 | > | check(3,0); | 
| 101 | > | fill = 0; | 
| 102 |  | break; | 
| 103 | < | case 'p':                               /* point */ | 
| 104 | < | check(3,3); | 
| 105 | < | ourview.vp[0] = atof(argv[++i]); | 
| 71 | < | ourview.vp[1] = atof(argv[++i]); | 
| 72 | < | ourview.vp[2] = atof(argv[++i]); | 
| 103 | > | case 'f':                               /* foreground */ | 
| 104 | > | check(3,0); | 
| 105 | > | fill = F_FORE; | 
| 106 |  | break; | 
| 107 | < | case 'd':                               /* direction */ | 
| 108 | < | check(3,3); | 
| 109 | < | ourview.vdir[0] = atof(argv[++i]); | 
| 77 | < | ourview.vdir[1] = atof(argv[++i]); | 
| 78 | < | ourview.vdir[2] = atof(argv[++i]); | 
| 107 | > | case 'b':                               /* background */ | 
| 108 | > | check(3,0); | 
| 109 | > | fill = F_BACK; | 
| 110 |  | break; | 
| 111 | < | case 'u':                               /* up */ | 
| 111 | > | case 'a':                               /* all */ | 
| 112 | > | check(3,0); | 
| 113 | > | fill = F_FORE|F_BACK; | 
| 114 | > | break; | 
| 115 | > | case 'c':                               /* color */ | 
| 116 |  | check(3,3); | 
| 117 | < | ourview.vup[0] = atof(argv[++i]); | 
| 118 | < | ourview.vup[1] = atof(argv[++i]); | 
| 119 | < | ourview.vup[2] = atof(argv[++i]); | 
| 117 | > | deffill = backfill; | 
| 118 | > | setcolr(backcolr, atof(argv[i+1]), | 
| 119 | > | atof(argv[i+2]), atof(argv[i+3])); | 
| 120 | > | i += 3; | 
| 121 |  | break; | 
| 122 | < | case 'h':                               /* horizontal */ | 
| 122 | > | case 'z':                               /* z value */ | 
| 123 |  | check(3,1); | 
| 124 | < | ourview.horiz = atof(argv[++i]); | 
| 124 | > | deffill = backfill; | 
| 125 | > | backz = atof(argv[++i]); | 
| 126 |  | break; | 
| 127 | < | case 'v':                               /* vertical */ | 
| 127 | > | case 'r':                               /* rtrace */ | 
| 128 |  | check(3,1); | 
| 129 | < | ourview.vert = atof(argv[++i]); | 
| 129 | > | deffill = rcalfill; | 
| 130 | > | calstart(RTCOM, argv[++i]); | 
| 131 |  | break; | 
| 94 | – | case 'f':                               /* file */ | 
| 95 | – | check(3,1); | 
| 96 | – | gotvfile = viewfile(argv[++i], &ourview); | 
| 97 | – | if (gotvfile < 0) { | 
| 98 | – | perror(argv[i]); | 
| 99 | – | exit(1); | 
| 100 | – | } else if (gotvfile == 0) { | 
| 101 | – | fprintf(stderr, "%s: bad view file\n", | 
| 102 | – | argv[i]); | 
| 103 | – | exit(1); | 
| 104 | – | } | 
| 105 | – | break; | 
| 132 |  | default: | 
| 133 |  | goto badopt; | 
| 134 |  | } | 
| 135 |  | break; | 
| 136 | + | case 'z':                               /* z file */ | 
| 137 | + | check(2,1); | 
| 138 | + | zfile = argv[++i]; | 
| 139 | + | break; | 
| 140 | + | case 'x':                               /* x resolution */ | 
| 141 | + | check(2,1); | 
| 142 | + | hresolu = atoi(argv[++i]); | 
| 143 | + | break; | 
| 144 | + | case 'y':                               /* y resolution */ | 
| 145 | + | check(2,1); | 
| 146 | + | vresolu = atoi(argv[++i]); | 
| 147 | + | break; | 
| 148 | + | case 'p':                               /* pixel aspect */ | 
| 149 | + | check(2,1); | 
| 150 | + | pixaspect = atof(argv[++i]); | 
| 151 | + | break; | 
| 152 | + | case 'v':                               /* view file */ | 
| 153 | + | if (argv[i][2] != 'f') | 
| 154 | + | goto badopt; | 
| 155 | + | check(3,1); | 
| 156 | + | gotvfile = viewfile(argv[++i], &ourview, 0, 0); | 
| 157 | + | if (gotvfile < 0) { | 
| 158 | + | perror(argv[i]); | 
| 159 | + | exit(1); | 
| 160 | + | } else if (gotvfile == 0) { | 
| 161 | + | fprintf(stderr, "%s: bad view file\n", | 
| 162 | + | argv[i]); | 
| 163 | + | exit(1); | 
| 164 | + | } | 
| 165 | + | break; | 
| 166 |  | default: | 
| 167 |  | badopt: | 
| 168 | < | fprintf(stderr, "%s: unknown option '%s'\n", | 
| 168 | > | fprintf(stderr, "%s: command line error at '%s'\n", | 
| 169 |  | progname, argv[i]); | 
| 170 | < | exit(1); | 
| 170 | > | goto userr; | 
| 171 |  | } | 
| 116 | – | /* check arguments */ | 
| 117 | – | if (argc-i < 2 || (argc-i)%2) { | 
| 118 | – | fprintf(stderr, "Usage: %s [view args] pfile zfile ..\n", | 
| 119 | – | progname); | 
| 120 | – | exit(1); | 
| 172 |  | } | 
| 173 | + | /* check arguments */ | 
| 174 | + | if ((argc-i)%2) | 
| 175 | + | goto userr; | 
| 176 |  | /* set view */ | 
| 177 |  | if (err = setview(&ourview)) { | 
| 178 |  | fprintf(stderr, "%s: %s\n", progname, err); | 
| 179 |  | exit(1); | 
| 180 |  | } | 
| 181 | + | normaspect(viewaspect(&ourview), &pixaspect, &hresolu, &vresolu); | 
| 182 |  | /* allocate frame */ | 
| 183 | < | ourpict = (COLR *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR)); | 
| 184 | < | ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float)); | 
| 185 | < | if (ourpict == NULL || ourzbuf == NULL) { | 
| 186 | < | perror(progname); | 
| 132 | < | exit(1); | 
| 133 | < | } | 
| 183 | > | ourpict = (COLR *)malloc(hresolu*vresolu*sizeof(COLR)); | 
| 184 | > | ourzbuf = (float *)calloc(hresolu*vresolu,sizeof(float)); | 
| 185 | > | if (ourpict == NULL || ourzbuf == NULL) | 
| 186 | > | syserror(); | 
| 187 |  | /* get input */ | 
| 188 |  | for ( ; i < argc; i += 2) | 
| 189 |  | addpicture(argv[i], argv[i+1]); | 
| 190 |  | /* fill in spaces */ | 
| 191 | < | fillpicture(); | 
| 191 | > | if (fill&F_BACK) | 
| 192 | > | backpicture(); | 
| 193 | > | else | 
| 194 | > | fillpicture(); | 
| 195 | > | /* close calculation */ | 
| 196 | > | caldone(); | 
| 197 |  | /* add to header */ | 
| 198 |  | printargs(argc, argv, stdout); | 
| 199 |  | if (gotvfile) { | 
| 201 |  | fprintview(&ourview, stdout); | 
| 202 |  | printf("\n"); | 
| 203 |  | } | 
| 204 | + | if (pixaspect < .99 || pixaspect > 1.01) | 
| 205 | + | fputaspect(pixaspect, stdout); | 
| 206 | + | if (ourexp > 0 && (ourexp < .995 || ourexp > 1.005)) | 
| 207 | + | fputexpos(ourexp, stdout); | 
| 208 |  | printf("\n"); | 
| 209 | < | /* write output */ | 
| 209 | > | /* write picture */ | 
| 210 |  | writepicture(); | 
| 211 | + | /* write z file */ | 
| 212 | + | if (zfile != NULL) | 
| 213 | + | writedistance(zfile); | 
| 214 |  |  | 
| 215 |  | exit(0); | 
| 216 | + | userr: | 
| 217 | + | fprintf(stderr, | 
| 218 | + | "Usage: %s [view opts][-t eps][-z zout][-fT][-n] pfile zspec ..\n", | 
| 219 | + | progname); | 
| 220 | + | exit(1); | 
| 221 |  | #undef check | 
| 222 |  | } | 
| 223 |  |  | 
| 230 |  |  | 
| 231 |  | printf("\t%s", s); | 
| 232 |  |  | 
| 233 | + | if (isexpos(s)) { | 
| 234 | + | theirexp *= exposval(s); | 
| 235 | + | return; | 
| 236 | + | } | 
| 237 |  | for (an = altname; *an != NULL; an++) | 
| 238 |  | if (!strncmp(*an, s, strlen(*an))) { | 
| 239 | < | if (sscanview(&theirview, s+strlen(*an)) == 0) | 
| 239 | > | if (sscanview(&theirview, s+strlen(*an)) > 0) | 
| 240 |  | gotview++; | 
| 241 |  | break; | 
| 242 |  | } | 
| 243 |  | } | 
| 244 |  |  | 
| 245 |  |  | 
| 246 | < | addpicture(pfile, zfile)                /* add picture to output */ | 
| 247 | < | char    *pfile, *zfile; | 
| 246 | > | addpicture(pfile, zspec)                /* add picture to output */ | 
| 247 | > | char    *pfile, *zspec; | 
| 248 |  | { | 
| 249 | < | FILE    *pfp, *zfp; | 
| 249 | > | extern double   atof(); | 
| 250 | > | FILE    *pfp; | 
| 251 | > | int     zfd; | 
| 252 |  | char    *err; | 
| 253 |  | COLR    *scanin; | 
| 254 | < | float   *zin, *zlast; | 
| 255 | < | int     *plast; | 
| 254 | > | float   *zin; | 
| 255 | > | struct position *plast; | 
| 256 |  | int     y; | 
| 257 | < | /* open input files */ | 
| 257 | > | /* open picture file */ | 
| 258 |  | if ((pfp = fopen(pfile, "r")) == NULL) { | 
| 259 |  | perror(pfile); | 
| 260 |  | exit(1); | 
| 261 |  | } | 
| 262 | < | if ((zfp = fopen(zfile, "r")) == NULL) { | 
| 263 | < | perror(zfile); | 
| 188 | < | exit(1); | 
| 189 | < | } | 
| 190 | < | /* get header and view */ | 
| 191 | < | printf("%s:\n", pfile); | 
| 262 | > | /* get header with exposure and view */ | 
| 263 | > | theirexp = 1.0; | 
| 264 |  | gotview = 0; | 
| 265 | + | printf("%s:\n", pfile); | 
| 266 |  | getheader(pfp, headline); | 
| 267 | < | if (!gotview || fgetresolu(&theirview.hresolu, &theirview.vresolu, pfp) | 
| 267 | > | if (!gotview || fgetresolu(&thresolu, &tvresolu, pfp) | 
| 268 |  | != (YMAJOR|YDECR)) { | 
| 269 |  | fprintf(stderr, "%s: picture view error\n", pfile); | 
| 270 |  | exit(1); | 
| 271 |  | } | 
| 272 | + | if (ourexp <= 0) | 
| 273 | + | ourexp = theirexp; | 
| 274 | + | else if (ABS(theirexp-ourexp) > .01*ourexp) | 
| 275 | + | fprintf(stderr, "%s: different exposure (warning)\n", pfile); | 
| 276 |  | if (err = setview(&theirview)) { | 
| 277 |  | fprintf(stderr, "%s: %s\n", pfile, err); | 
| 278 |  | exit(1); | 
| 280 |  | /* compute transformation */ | 
| 281 |  | pixform(theirs2ours, &theirview, &ourview); | 
| 282 |  | /* allocate scanlines */ | 
| 283 | < | scanin = (COLR *)malloc(theirview.hresolu*sizeof(COLR)); | 
| 284 | < | zin = (float *)malloc(theirview.hresolu*sizeof(float)); | 
| 285 | < | zlast = (float *)calloc(theirview.hresolu, sizeof(float)); | 
| 286 | < | plast = (int *)calloc(theirview.hresolu, sizeof(int)); | 
| 287 | < | if (scanin == NULL || zin == NULL || zlast == NULL || plast == NULL) { | 
| 288 | < | perror(progname); | 
| 289 | < | exit(1); | 
| 283 | > | scanin = (COLR *)malloc(thresolu*sizeof(COLR)); | 
| 284 | > | zin = (float *)malloc(thresolu*sizeof(float)); | 
| 285 | > | plast = (struct position *)calloc(thresolu, sizeof(struct position)); | 
| 286 | > | if (scanin == NULL || zin == NULL || plast == NULL) | 
| 287 | > | syserror(); | 
| 288 | > | /* get z specification or file */ | 
| 289 | > | if ((zfd = open(zspec, O_RDONLY)) == -1) { | 
| 290 | > | double  zvalue; | 
| 291 | > | register int    x; | 
| 292 | > | if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0) { | 
| 293 | > | perror(zspec); | 
| 294 | > | exit(1); | 
| 295 | > | } | 
| 296 | > | for (x = 0; x < thresolu; x++) | 
| 297 | > | zin[x] = zvalue; | 
| 298 |  | } | 
| 299 |  | /* load image */ | 
| 300 | < | for (y = theirview.vresolu-1; y >= 0; y--) { | 
| 301 | < | if (freadcolrs(scanin, theirview.hresolu, pfp) < 0) { | 
| 300 | > | for (y = tvresolu-1; y >= 0; y--) { | 
| 301 | > | if (freadcolrs(scanin, thresolu, pfp) < 0) { | 
| 302 |  | fprintf(stderr, "%s: read error\n", pfile); | 
| 303 |  | exit(1); | 
| 304 |  | } | 
| 305 | < | if (fread(zin, sizeof(float), theirview.hresolu, zfp) | 
| 306 | < | < theirview.hresolu) { | 
| 307 | < | fprintf(stderr, "%s: read error\n", zfile); | 
| 305 | > | if (zfd != -1 && read(zfd,(char *)zin,thresolu*sizeof(float)) | 
| 306 | > | < thresolu*sizeof(float)) { | 
| 307 | > | fprintf(stderr, "%s: read error\n", zspec); | 
| 308 |  | exit(1); | 
| 309 |  | } | 
| 310 | < | addscanline(y, scanin, zin, plast, zlast); | 
| 310 | > | addscanline(y, scanin, zin, plast); | 
| 311 |  | } | 
| 312 |  | /* clean up */ | 
| 313 |  | free((char *)scanin); | 
| 314 |  | free((char *)zin); | 
| 315 |  | free((char *)plast); | 
| 231 | – | free((char *)zlast); | 
| 316 |  | fclose(pfp); | 
| 317 | < | fclose(zfp); | 
| 317 | > | if (zfd != -1) | 
| 318 | > | close(zfd); | 
| 319 |  | } | 
| 320 |  |  | 
| 321 |  |  | 
| 326 |  | double  m4t[4][4]; | 
| 327 |  |  | 
| 328 |  | setident4(xfmat); | 
| 329 | < | xfmat[0][0] = vw1->vhinc[0]; | 
| 330 | < | xfmat[0][1] = vw1->vhinc[1]; | 
| 331 | < | xfmat[0][2] = vw1->vhinc[2]; | 
| 332 | < | xfmat[1][0] = vw1->vvinc[0]; | 
| 333 | < | xfmat[1][1] = vw1->vvinc[1]; | 
| 334 | < | xfmat[1][2] = vw1->vvinc[2]; | 
| 329 | > | xfmat[0][0] = vw1->hvec[0]; | 
| 330 | > | xfmat[0][1] = vw1->hvec[1]; | 
| 331 | > | xfmat[0][2] = vw1->hvec[2]; | 
| 332 | > | xfmat[1][0] = vw1->vvec[0]; | 
| 333 | > | xfmat[1][1] = vw1->vvec[1]; | 
| 334 | > | xfmat[1][2] = vw1->vvec[2]; | 
| 335 |  | xfmat[2][0] = vw1->vdir[0]; | 
| 336 |  | xfmat[2][1] = vw1->vdir[1]; | 
| 337 |  | xfmat[2][2] = vw1->vdir[2]; | 
| 339 |  | xfmat[3][1] = vw1->vp[1]; | 
| 340 |  | xfmat[3][2] = vw1->vp[2]; | 
| 341 |  | setident4(m4t); | 
| 342 | < | m4t[0][0] = vw2->vhinc[0]/vw2->vhn2; | 
| 343 | < | m4t[1][0] = vw2->vhinc[1]/vw2->vhn2; | 
| 344 | < | m4t[2][0] = vw2->vhinc[2]/vw2->vhn2; | 
| 345 | < | m4t[3][0] = -DOT(vw2->vp,vw2->vhinc)/vw2->vhn2; | 
| 346 | < | m4t[0][1] = vw2->vvinc[0]/vw2->vvn2; | 
| 347 | < | m4t[1][1] = vw2->vvinc[1]/vw2->vvn2; | 
| 348 | < | m4t[2][1] = vw2->vvinc[2]/vw2->vvn2; | 
| 349 | < | m4t[3][1] = -DOT(vw2->vp,vw2->vvinc)/vw2->vvn2; | 
| 342 | > | m4t[0][0] = vw2->hvec[0]/vw2->hn2; | 
| 343 | > | m4t[1][0] = vw2->hvec[1]/vw2->hn2; | 
| 344 | > | m4t[2][0] = vw2->hvec[2]/vw2->hn2; | 
| 345 | > | m4t[3][0] = -DOT(vw2->vp,vw2->hvec)/vw2->hn2; | 
| 346 | > | m4t[0][1] = vw2->vvec[0]/vw2->vn2; | 
| 347 | > | m4t[1][1] = vw2->vvec[1]/vw2->vn2; | 
| 348 | > | m4t[2][1] = vw2->vvec[2]/vw2->vn2; | 
| 349 | > | m4t[3][1] = -DOT(vw2->vp,vw2->vvec)/vw2->vn2; | 
| 350 |  | m4t[0][2] = vw2->vdir[0]; | 
| 351 |  | m4t[1][2] = vw2->vdir[1]; | 
| 352 |  | m4t[2][2] = vw2->vdir[2]; | 
| 355 |  | } | 
| 356 |  |  | 
| 357 |  |  | 
| 358 | < | addscanline(y, pline, zline, lasty, lastyz)     /* add scanline to output */ | 
| 358 | > | addscanline(y, pline, zline, lasty)     /* add scanline to output */ | 
| 359 |  | int     y; | 
| 360 |  | COLR    *pline; | 
| 361 |  | float   *zline; | 
| 362 | < | int     *lasty;                 /* input/output */ | 
| 278 | < | float   *lastyz;                /* input/output */ | 
| 362 | > | struct position *lasty;         /* input/output */ | 
| 363 |  | { | 
| 364 | < | extern double   sqrt(), fabs(); | 
| 364 | > | extern double   sqrt(); | 
| 365 |  | double  pos[3]; | 
| 366 | < | int     lastx = 0; | 
| 283 | < | double  lastxz = 0; | 
| 284 | < | double  zt; | 
| 285 | < | int     xpos, ypos; | 
| 366 | > | struct position lastx, newpos; | 
| 367 |  | register int    x; | 
| 368 |  |  | 
| 369 | < | for (x = theirview.hresolu-1; x >= 0; x--) { | 
| 370 | < | pos[0] = x - .5*(theirview.hresolu-1); | 
| 371 | < | pos[1] = y - .5*(theirview.vresolu-1); | 
| 369 | > | lastx.z = 0; | 
| 370 | > | for (x = thresolu-1; x >= 0; x--) { | 
| 371 | > | pos[0] = (x+.5)/thresolu + theirview.hoff - .5; | 
| 372 | > | pos[1] = (y+.5)/tvresolu + theirview.voff - .5; | 
| 373 |  | pos[2] = zline[x]; | 
| 374 |  | if (theirview.type == VT_PER) { | 
| 375 | < | /* | 
| 376 | < | * The following (single) statement can go | 
| 377 | < | * if z is along the view direction rather | 
| 378 | < | * than an eye ray. | 
| 297 | < | */ | 
| 298 | < | pos[2] /= sqrt( 1. | 
| 299 | < | + pos[0]*pos[0]*theirview.vhn2 | 
| 300 | < | + pos[1]*pos[1]*theirview.vvn2 ); | 
| 375 | > | if (normdist)   /* adjust for eye-ray distance */ | 
| 376 | > | pos[2] /= sqrt( 1. | 
| 377 | > | + pos[0]*pos[0]*theirview.hn2 | 
| 378 | > | + pos[1]*pos[1]*theirview.vn2 ); | 
| 379 |  | pos[0] *= pos[2]; | 
| 380 |  | pos[1] *= pos[2]; | 
| 381 |  | } | 
| 382 |  | multp3(pos, pos, theirs2ours); | 
| 383 | < | if (pos[2] <= 0) | 
| 383 | > | if (pos[2] <= 0) { | 
| 384 | > | lasty[x].z = lastx.z = 0;       /* mark invalid */ | 
| 385 |  | continue; | 
| 386 | + | } | 
| 387 |  | if (ourview.type == VT_PER) { | 
| 388 |  | pos[0] /= pos[2]; | 
| 389 |  | pos[1] /= pos[2]; | 
| 390 |  | } | 
| 391 | < | pos[0] += .5*ourview.hresolu; | 
| 392 | < | pos[1] += .5*ourview.vresolu; | 
| 393 | < | if (pos[0] < 0 || (xpos = pos[0]) >= ourview.hresolu | 
| 394 | < | || pos[1] < 0 || (ypos = pos[1]) >= ourview.vresolu) | 
| 395 | < | continue; | 
| 391 | > | pos[0] += .5 - ourview.hoff; | 
| 392 | > | pos[1] += .5 - ourview.voff; | 
| 393 | > | newpos.x = pos[0] * hresolu; | 
| 394 | > | newpos.y = pos[1] * vresolu; | 
| 395 | > | newpos.z = zline[x]; | 
| 396 |  | /* add pixel to our image */ | 
| 397 | < | zt = 2.*zeps*zline[x]; | 
| 398 | < | addpixel(xpos, ypos, | 
| 399 | < | (fabs(zline[x]-lastxz) <= zt) ? lastx - xpos : 1, | 
| 400 | < | (fabs(zline[x]-lastyz[x]) <= zt) ? lasty[x] - ypos : 1, | 
| 401 | < | pline[x], pos[2]); | 
| 402 | < | lastx = xpos; | 
| 403 | < | lasty[x] = ypos; | 
| 404 | < | lastxz = lastyz[x] = zline[x]; | 
| 397 | > | if (pos[0] >= 0 && newpos.x < hresolu | 
| 398 | > | && pos[1] >= 0 && newpos.y < vresolu) { | 
| 399 | > | addpixel(&newpos, &lastx, &lasty[x], pline[x], pos[2]); | 
| 400 | > | lasty[x].x = lastx.x = newpos.x; | 
| 401 | > | lasty[x].y = lastx.y = newpos.y; | 
| 402 | > | lasty[x].z = lastx.z = newpos.z; | 
| 403 | > | } else | 
| 404 | > | lasty[x].z = lastx.z = 0;       /* mark invalid */ | 
| 405 |  | } | 
| 406 |  | } | 
| 407 |  |  | 
| 408 |  |  | 
| 409 | < | addpixel(xstart, ystart, width, height, pix, z) /* fill in area for pixel */ | 
| 410 | < | int     xstart, ystart; | 
| 331 | < | int     width, height; | 
| 409 | > | addpixel(p0, p1, p2, pix, z)            /* fill in pixel parallelogram */ | 
| 410 | > | struct position *p0, *p1, *p2; | 
| 411 |  | COLR    pix; | 
| 412 |  | double  z; | 
| 413 |  | { | 
| 414 | < | register int    x, y; | 
| 415 | < | /* make width and height positive */ | 
| 416 | < | if (width < 0) { | 
| 417 | < | width = -width; | 
| 418 | < | xstart = xstart-width+1; | 
| 419 | < | } else if (width == 0) | 
| 420 | < | width = 1; | 
| 421 | < | if (height < 0) { | 
| 422 | < | height = -height; | 
| 423 | < | ystart = ystart-height+1; | 
| 424 | < | } else if (height == 0) | 
| 425 | < | height = 1; | 
| 426 | < | /* fill pixel(s) within rectangle */ | 
| 427 | < | for (y = ystart; y < ystart+height; y++) | 
| 428 | < | for (x = xstart; x < xstart+width; x++) | 
| 429 | < | if (zscan(y)[x] <= 0 | 
| 430 | < | || zscan(y)[x]-z > zeps*zscan(y)[x]) { | 
| 414 | > | double  zt = 2.*zeps*p0->z;             /* threshold */ | 
| 415 | > | int     s1x, s1y, s2x, s2y;             /* step sizes */ | 
| 416 | > | int     l1, l2, c1, c2;                 /* side lengths and counters */ | 
| 417 | > | int     p1isy;                          /* p0p1 along y? */ | 
| 418 | > | int     x1, y1;                         /* p1 position */ | 
| 419 | > | register int    x, y;                   /* final position */ | 
| 420 | > |  | 
| 421 | > | /* compute vector p0p1 */ | 
| 422 | > | if (fill&F_FORE && ABS(p1->z-p0->z) <= zt) { | 
| 423 | > | s1x = p1->x - p0->x; | 
| 424 | > | s1y = p1->y - p0->y; | 
| 425 | > | l1 = ABS(s1x); | 
| 426 | > | if (p1isy = (ABS(s1y) > l1)) | 
| 427 | > | l1 = ABS(s1y); | 
| 428 | > | } else { | 
| 429 | > | l1 = s1x = s1y = 1; | 
| 430 | > | p1isy = -1; | 
| 431 | > | } | 
| 432 | > | /* compute vector p0p2 */ | 
| 433 | > | if (fill&F_FORE && ABS(p2->z-p0->z) <= zt) { | 
| 434 | > | s2x = p2->x - p0->x; | 
| 435 | > | s2y = p2->y - p0->y; | 
| 436 | > | if (p1isy == 1) | 
| 437 | > | l2 = ABS(s2x); | 
| 438 | > | else { | 
| 439 | > | l2 = ABS(s2y); | 
| 440 | > | if (p1isy != 0 && ABS(s2x) > l2) | 
| 441 | > | l2 = ABS(s2x); | 
| 442 | > | } | 
| 443 | > | } else | 
| 444 | > | l2 = s2x = s2y = 1; | 
| 445 | > | /* fill the parallelogram */ | 
| 446 | > | for (c1 = l1; c1-- > 0; ) { | 
| 447 | > | x1 = p0->x + c1*s1x/l1; | 
| 448 | > | y1 = p0->y + c1*s1y/l1; | 
| 449 | > | for (c2 = l2; c2-- > 0; ) { | 
| 450 | > | x = x1 + c2*s2x/l2; | 
| 451 | > | y = y1 + c2*s2y/l2; | 
| 452 | > | if (zscan(y)[x] <= 0 || zscan(y)[x]-z | 
| 453 | > | > zeps*zscan(y)[x]) { | 
| 454 |  | zscan(y)[x] = z; | 
| 455 |  | copycolr(pscan(y)[x], pix); | 
| 456 |  | } | 
| 457 | + | } | 
| 458 | + | } | 
| 459 |  | } | 
| 460 |  |  | 
| 461 |  |  | 
| 462 | < | fillpicture()                           /* fill in empty spaces */ | 
| 462 | > | backpicture()                           /* background fill algorithm */ | 
| 463 |  | { | 
| 464 |  | int     *yback, xback; | 
| 465 |  | int     y; | 
| 466 |  | COLR    pfill; | 
| 467 |  | register int    x, i; | 
| 468 |  | /* get back buffer */ | 
| 469 | < | yback = (int *)malloc(ourview.hresolu*sizeof(int)); | 
| 470 | < | if (yback == NULL) { | 
| 471 | < | perror(progname); | 
| 472 | < | return; | 
| 369 | < | } | 
| 370 | < | for (x = 0; x < ourview.hresolu; x++) | 
| 469 | > | yback = (int *)malloc(hresolu*sizeof(int)); | 
| 470 | > | if (yback == NULL) | 
| 471 | > | syserror(); | 
| 472 | > | for (x = 0; x < hresolu; x++) | 
| 473 |  | yback[x] = -2; | 
| 474 |  | /* | 
| 475 |  | * Xback and yback are the pixel locations of suitable | 
| 478 |  | * that there is no suitable background in this direction. | 
| 479 |  | */ | 
| 480 |  | /* fill image */ | 
| 481 | < | for (y = 0; y < ourview.vresolu; y++) { | 
| 481 | > | for (y = 0; y < vresolu; y++) { | 
| 482 |  | xback = -2; | 
| 483 | < | for (x = 0; x < ourview.hresolu; x++) | 
| 483 | > | for (x = 0; x < hresolu; x++) | 
| 484 |  | if (zscan(y)[x] <= 0) {         /* empty pixel */ | 
| 485 |  | /* | 
| 486 |  | * First, find background from above or below. | 
| 487 |  | * (farthest assigned pixel) | 
| 488 |  | */ | 
| 489 |  | if (yback[x] == -2) { | 
| 490 | < | for (i = y+1; i < ourview.vresolu; i++) | 
| 490 | > | for (i = y+1; i < vresolu; i++) | 
| 491 |  | if (zscan(i)[x] > 0) | 
| 492 |  | break; | 
| 493 | < | if (i < ourview.vresolu | 
| 493 | > | if (i < vresolu | 
| 494 |  | && (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) | 
| 495 |  | yback[x] = i; | 
| 496 |  | else | 
| 500 |  | * Next, find background from left or right. | 
| 501 |  | */ | 
| 502 |  | if (xback == -2) { | 
| 503 | < | for (i = x+1; x < ourview.hresolu; i++) | 
| 503 | > | for (i = x+1; i < hresolu; i++) | 
| 504 |  | if (zscan(y)[i] > 0) | 
| 505 |  | break; | 
| 506 | < | if (i < ourview.hresolu | 
| 506 | > | if (i < hresolu | 
| 507 |  | && (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) | 
| 508 |  | xback = i; | 
| 509 |  | else | 
| 510 |  | xback = x-1; | 
| 511 |  | } | 
| 410 | – | if (xback < 0 && yback[x] < 0) | 
| 411 | – | continue;       /* no background */ | 
| 512 |  | /* | 
| 513 | + | * Check to see if we have no background for | 
| 514 | + | * this pixel.  If not, use background color. | 
| 515 | + | */ | 
| 516 | + | if (xback < 0 && yback[x] < 0) { | 
| 517 | + | (*deffill)(x,y); | 
| 518 | + | continue; | 
| 519 | + | } | 
| 520 | + | /* | 
| 521 |  | * Compare, and use the background that is | 
| 522 |  | * farther, unless one of them is next to us. | 
| 523 |  | */ | 
| 524 | < | if (yback[x] < 0 || ABS(x-xback) <= 1 | 
| 524 | > | if ( yback[x] < 0 | 
| 525 | > | || (xback >= 0 && ABS(x-xback) <= 1) | 
| 526 |  | || ( ABS(y-yback[x]) > 1 | 
| 527 | < | && zscan(yback[x])[x] < zscan(y)[xback] )) | 
| 527 | > | && zscan(yback[x])[x] | 
| 528 | > | < zscan(y)[xback] ) ) { | 
| 529 |  | copycolr(pscan(y)[x],pscan(y)[xback]); | 
| 530 | < | else | 
| 530 | > | zscan(y)[x] = zscan(y)[xback]; | 
| 531 | > | } else { | 
| 532 |  | copycolr(pscan(y)[x],pscan(yback[x])[x]); | 
| 533 | + | zscan(y)[x] = zscan(yback[x])[x]; | 
| 534 | + | } | 
| 535 |  | } else {                                /* full pixel */ | 
| 536 |  | yback[x] = -2; | 
| 537 |  | xback = -2; | 
| 541 |  | } | 
| 542 |  |  | 
| 543 |  |  | 
| 544 | + | fillpicture()                           /* paint in empty pixels with default */ | 
| 545 | + | { | 
| 546 | + | register int    x, y; | 
| 547 | + |  | 
| 548 | + | for (y = 0; y < vresolu; y++) | 
| 549 | + | for (x = 0; x < hresolu; x++) | 
| 550 | + | if (zscan(y)[x] <= 0) | 
| 551 | + | (*deffill)(x,y); | 
| 552 | + | } | 
| 553 | + |  | 
| 554 | + |  | 
| 555 |  | writepicture()                          /* write out picture */ | 
| 556 |  | { | 
| 557 |  | int     y; | 
| 558 |  |  | 
| 559 | < | fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout); | 
| 560 | < | for (y = ourview.vresolu-1; y >= 0; y--) | 
| 561 | < | if (fwritecolrs(pscan(y), ourview.hresolu, stdout) < 0) { | 
| 562 | < | perror(progname); | 
| 559 | > | fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); | 
| 560 | > | for (y = vresolu-1; y >= 0; y--) | 
| 561 | > | if (fwritecolrs(pscan(y), hresolu, stdout) < 0) | 
| 562 | > | syserror(); | 
| 563 | > | } | 
| 564 | > |  | 
| 565 | > |  | 
| 566 | > | writedistance(fname)                    /* write out z file */ | 
| 567 | > | char    *fname; | 
| 568 | > | { | 
| 569 | > | extern double   sqrt(); | 
| 570 | > | int     donorm = normdist && ourview.type == VT_PER; | 
| 571 | > | int     fd; | 
| 572 | > | int     y; | 
| 573 | > | float   *zout; | 
| 574 | > |  | 
| 575 | > | if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1) { | 
| 576 | > | perror(fname); | 
| 577 | > | exit(1); | 
| 578 | > | } | 
| 579 | > | if (donorm | 
| 580 | > | && (zout = (float *)malloc(hresolu*sizeof(float))) == NULL) | 
| 581 | > | syserror(); | 
| 582 | > | for (y = vresolu-1; y >= 0; y--) { | 
| 583 | > | if (donorm) { | 
| 584 | > | double  vx, yzn2; | 
| 585 | > | register int    x; | 
| 586 | > | yzn2 = y - .5*(vresolu-1); | 
| 587 | > | yzn2 = 1. + yzn2*yzn2*ourview.vn2; | 
| 588 | > | for (x = 0; x < hresolu; x++) { | 
| 589 | > | vx = x - .5*(hresolu-1); | 
| 590 | > | zout[x] = zscan(y)[x] | 
| 591 | > | * sqrt(vx*vx*ourview.hn2 + yzn2); | 
| 592 | > | } | 
| 593 | > | } else | 
| 594 | > | zout = zscan(y); | 
| 595 | > | if (write(fd, (char *)zout, hresolu*sizeof(float)) | 
| 596 | > | < hresolu*sizeof(float)) { | 
| 597 | > | perror(fname); | 
| 598 |  | exit(1); | 
| 599 |  | } | 
| 600 | + | } | 
| 601 | + | if (donorm) | 
| 602 | + | free((char *)zout); | 
| 603 | + | close(fd); | 
| 604 | + | } | 
| 605 | + |  | 
| 606 | + |  | 
| 607 | + | isfloat(s)                              /* see if string is floating number */ | 
| 608 | + | register char   *s; | 
| 609 | + | { | 
| 610 | + | for ( ; *s; s++) | 
| 611 | + | if ((*s < '0' || *s > '9') && *s != '.' && *s != '-' | 
| 612 | + | && *s != 'e' && *s != 'E' && *s != '+') | 
| 613 | + | return(0); | 
| 614 | + | return(1); | 
| 615 | + | } | 
| 616 | + |  | 
| 617 | + |  | 
| 618 | + | backfill(x, y)                          /* fill pixel with background */ | 
| 619 | + | int     x, y; | 
| 620 | + | { | 
| 621 | + | register BYTE   *dest = pscan(y)[x]; | 
| 622 | + |  | 
| 623 | + | copycolr(dest, backcolr); | 
| 624 | + | zscan(y)[x] = backz; | 
| 625 | + | } | 
| 626 | + |  | 
| 627 | + |  | 
| 628 | + | calstart(prog, args)                    /* start fill calculation */ | 
| 629 | + | char    *prog, *args; | 
| 630 | + | { | 
| 631 | + | char    combuf[512]; | 
| 632 | + | int     p0[2], p1[2]; | 
| 633 | + |  | 
| 634 | + | if (childpid != -1) { | 
| 635 | + | fprintf(stderr, "%s: too many calculations\n", progname); | 
| 636 | + | exit(1); | 
| 637 | + | } | 
| 638 | + | sprintf(combuf, prog, PACKSIZ, args); | 
| 639 | + | if (pipe(p0) < 0 || pipe(p1) < 0) | 
| 640 | + | syserror(); | 
| 641 | + | if ((childpid = vfork()) == 0) {        /* fork calculation */ | 
| 642 | + | close(p0[1]); | 
| 643 | + | close(p1[0]); | 
| 644 | + | if (p0[0] != 0) { | 
| 645 | + | dup2(p0[0], 0); | 
| 646 | + | close(p0[0]); | 
| 647 | + | } | 
| 648 | + | if (p1[1] != 1) { | 
| 649 | + | dup2(p1[1], 1); | 
| 650 | + | close(p1[1]); | 
| 651 | + | } | 
| 652 | + | execl("/bin/sh", "sh", "-c", combuf, 0); | 
| 653 | + | perror("/bin/sh"); | 
| 654 | + | _exit(127); | 
| 655 | + | } | 
| 656 | + | if (childpid == -1) | 
| 657 | + | syserror(); | 
| 658 | + | close(p0[0]); | 
| 659 | + | close(p1[1]); | 
| 660 | + | if ((psend = fdopen(p0[1], "w")) == NULL) | 
| 661 | + | syserror(); | 
| 662 | + | if ((precv = fdopen(p1[0], "r")) == NULL) | 
| 663 | + | syserror(); | 
| 664 | + | queuesiz = 0; | 
| 665 | + | } | 
| 666 | + |  | 
| 667 | + |  | 
| 668 | + | caldone()                               /* done with calculation */ | 
| 669 | + | { | 
| 670 | + | int     pid; | 
| 671 | + |  | 
| 672 | + | if (childpid == -1) | 
| 673 | + | return; | 
| 674 | + | clearqueue(1); | 
| 675 | + | while ((pid = wait(0)) != -1 && pid != childpid) | 
| 676 | + | ; | 
| 677 | + | childpid = -1; | 
| 678 | + | } | 
| 679 | + |  | 
| 680 | + |  | 
| 681 | + | rcalfill(x, y)                          /* fill with ray-calculated pixel */ | 
| 682 | + | int     x, y; | 
| 683 | + | { | 
| 684 | + | if (queuesiz >= PACKSIZ)        /* flush queue if needed */ | 
| 685 | + | clearqueue(0); | 
| 686 | + | /* add position to queue */ | 
| 687 | + | queue[queuesiz][0] = x; | 
| 688 | + | queue[queuesiz][1] = y; | 
| 689 | + | queuesiz++; | 
| 690 | + | } | 
| 691 | + |  | 
| 692 | + |  | 
| 693 | + | clearqueue(done)                        /* process queue */ | 
| 694 | + | int     done; | 
| 695 | + | { | 
| 696 | + | FVECT   orig, dir; | 
| 697 | + | float   fbuf[6]; | 
| 698 | + | register int    i; | 
| 699 | + |  | 
| 700 | + | for (i = 0; i < queuesiz; i++) { | 
| 701 | + | viewray(orig, dir, &ourview, | 
| 702 | + | (queue[i][0]+.5)/hresolu, | 
| 703 | + | (queue[i][1]+.5)/vresolu); | 
| 704 | + | fbuf[0] = orig[0]; fbuf[1] = orig[1]; fbuf[2] = orig[2]; | 
| 705 | + | fbuf[3] = dir[0]; fbuf[4] = dir[1]; fbuf[5] = dir[2]; | 
| 706 | + | fwrite((char *)fbuf, sizeof(float), 6, psend); | 
| 707 | + | } | 
| 708 | + | if ((done ? fclose(psend) : fflush(psend)) == EOF) | 
| 709 | + | syserror(); | 
| 710 | + | for (i = 0; i < queuesiz; i++) { | 
| 711 | + | if (fread((char *)fbuf, sizeof(float), 4, precv) < 4) { | 
| 712 | + | fprintf(stderr, "%s: read error in clearqueue\n", | 
| 713 | + | progname); | 
| 714 | + | exit(1); | 
| 715 | + | } | 
| 716 | + | if (ourexp > 0 && ourexp != 1.0) { | 
| 717 | + | fbuf[0] *= ourexp; | 
| 718 | + | fbuf[1] *= ourexp; | 
| 719 | + | fbuf[2] *= ourexp; | 
| 720 | + | } | 
| 721 | + | setcolr(pscan(queue[i][1])[queue[i][0]], | 
| 722 | + | fbuf[0], fbuf[1], fbuf[2]); | 
| 723 | + | zscan(queue[i][1])[queue[i][0]] = fbuf[3]; | 
| 724 | + | } | 
| 725 | + | if (done) | 
| 726 | + | fclose(precv); | 
| 727 | + | queuesiz = 0; | 
| 728 | + | } | 
| 729 | + |  | 
| 730 | + |  | 
| 731 | + | syserror()                      /* report error and exit */ | 
| 732 | + | { | 
| 733 | + | perror(progname); | 
| 734 | + | exit(1); | 
| 735 |  | } |