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Comparing ray/src/cv/mgflib/mgfdoc.tr (file contents):
Revision 1.1 by greg, Fri May 12 14:26:12 1995 UTC vs.
Revision 1.3 by greg, Mon May 15 14:42:30 1995 UTC

# Line 431 | Line 431 | Since the arguments are concise and self-explanatory,
431   sufficient.
432   The following transformation flags and
433   parameters are defined:
434 < .TS I
434 > .TS
435 > center;
436   l l.
437   -t dx dy dz     translate objects along the given vector
438   -rx degrees     rotate objects about the X-axis
# Line 546 | Line 547 | Detailed MGF Example
547   The following example of a simple room with a single door
548   and six file cabinets shows MGF in action, with copious comments to
549   help explain what's going on.
550 + .LP
551   .DS
552   # "ceiling_tile" is a diffuse white surface with 75% reflectance:
553   # Create new named material context and clear it
# Line 772 | Line 774 | There are currently 28 entities in the MGF specificati
774   For ease of reference we have broken these into five categories:
775   .IP 1.
776   General
777 < .TS I
777 > .TS
778   lw(.75i) lw(1.75i) lw(3i).
779   #       [anything ...]  a comment
780   o       [name]  begin/end object context
# Line 782 | Line 784 | ies    pathname [-m f][xform]  include IES luminaire (with
784   .TE
785   .IP 2.
786   Color
787 < .TS I
787 > .TS
788   lw(.75i) lw(1.75i) lw(3i).
789   c       [id [= [template]]]     get/set color context
790   cxy     x y     set CIE (x,y) chromaticity for current color
# Line 2695 | Line 2697 | Greg Ward
2697   SEE ALSO
2698   .LP
2699   ies2rad(1), mgf2meta(1), obj2rad(1), oconv(1), rad2mgf(1), xform(1)
2700 < .ds RH
2699 < RAD2MGF
2700 > .ds RH RAD2MGF
2701   .bp
2702   .SH
2703   NAME
# Line 2985 | Line 2986 | char   **av;
2986  
2987          if (ac < 4)                     /* check # arguments */
2988                  return(MG_EARGC);
2989 <        printf("face\n");               /* begin face output */
2989 >        printf("face\\\\n");            /* begin face output */
2990          for (i = 1; i < ac; i++) {
2991                  if ((vp = c_getvert(av[i])) == NULL)    /* vertex from name */
2992                          return(MG_EUNDEF);
2993                  xf_xfmpoint(vert, vp->p);                       /* apply transform */
2994 <                printf("%15.9f %15.9f %15.9f\n",
2994 >                printf("%15.9f %15.9f %15.9f\\\\n",
2995                          vert[0], vert[1], vert[2]);                     /* output vertex */
2996          }
2997 <        printf(";\\n");                 /* end of face output */
2997 >        printf(";\\\\n");                       /* end of face output */
2998          return(MG_OK);                  /* normal exit */
2999   }
3000  
# Line 3127 | Line 3128 | following:
3128   #define MG_E_FACE               9               /* f            */
3129   #define MG_E_INCLUDE    10              /* i            */
3130   #define MG_E_IES                11              /* ies          */
3131 < #define MG_E_IR         12              /* ir           */
3131 > #define MG_E_IR                 12              /* ir           */
3132   #define MG_E_MATERIAL   13              /* m            */
3133   #define MG_E_NORMAL     14              /* n            */
3134   #define MG_E_OBJECT     15              /* o            */
# Line 3267 | Line 3268 | and return one of the non-zero values from "parser.h"
3268   #define MG_EUNK         1               /* unknown entity */
3269   #define MG_EARGC                2               /* wrong number of arguments */
3270   #define MG_ETYPE                3               /* argument type error */
3271 < #define MG_EILL         4               /* illegal argument value */
3271 > #define MG_EILL                 4               /* illegal argument value */
3272   #define MG_EUNDEF               5               /* undefined reference */
3273   #define MG_ENOFILE              6               /* cannot open input file */
3274   #define MG_EINCL                7               /* error in included file */
# Line 4275 | Line 4276 | mg_init, mg_load, obj_handler, xf_xfmpoint
4276   .SH
4277   NAME
4278   .LP
4279 < xf_xfmpoint xf_xfmvect, xf_rotvect, xf_scale - apply current
4279 > xf_xfmpoint, xf_xfmvect, xf_rotvect, xf_scale - apply current
4280   transformation
4281   .SH
4282   SYNOPSIS
# Line 4304 | Line 4305 | to the point
4305   .I pold,
4306   scaling, rotating and moving it to its proper location, which is put in
4307   .I pnew.
4308 < (The two arguments may point to the same vector.)\0
4308 > (As for
4309 > .I xf_xfmvect
4310 > and
4311 > .I xf_rotvect,
4312 > the two arguments may point to the same vector.)\0
4313   .LP
4314   The
4315   .I xf_xfmvect
# Line 4312 | Line 4317 | routine applies the current transformation to the vect
4317   .I vold,
4318   scaling and rotating it to its proper location, which is put in
4319   .I vnew.
4315 – (The two arguments may point to the same vector.)\0
4320   The only difference between
4321   .I xf_xfmpoint
4322   and
# Line 4325 | Line 4329 | routine rotates the vector
4329   .I nold
4330   using the current transformation, and stores the result in
4331   .I nnew.
4328 – (The two arguments may point to the same vector.)\0
4332   No translation or scaling is applied, which is the appropriate
4333   action for surface normal vectors for example.
4334   .LP

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