AutoCAD DXF to 3DVector Converter. V0.3  By John McCarthy (also does .PLG's)

Options:

DXF23DV inputname outputname [-s# -x# -y# -z# -mfilename -u# -v# -w# -l -n -q]

  -x  x translation for object (before scale) - can be floating point, +z = up
  -y  y translation for object (before scale) - can be floating point, +z = up
  -z  z translation for object (before scale) - can be floating point, +z = up
  -s  scale factor                            - can be floating point, +z = up
  -u  x translation for object (after scale)  - integer only, +y = down
  -v  y translation for object (after scale)  - integer only, +y = down
  -w  z translation for object (after scale)  - integer only, +y = down
  -m  materials list filename (corresponds to layer names)
  -l  selective layer processing (only process layers that are found
      in materials file)
  -n  output true calculated surface normal (otherwise 0,0,0)
  -q  negate Y axis
  -b  sort surfaces based on surface normal (default=sort)

  I you have trouble assigning a material to a line it may be because the
  layer that the line is on has the shading option.  Lines  do  not  have
  surface normals and therefore  cannot  have  the  shading  option  set.
  If DXF23DV finds this occurance, it will insert  a default texture that
  has no shading texture.  eg:  0,0,colour,0

  If your a total knumbskull (like me) and  you  get  ACAD's  co-ordinate
  system messed up (like me) you can use the -q option to  negate  the  Y
  axis and reverse the orientation of the polygons.  This  will  fix  the
  object if it appears to be "backwards".

  Do not use punctuation in your material names or layer names.
  A # sign in the materials file means a comment
  A : means to put the following text AFTER the connection data.

  Example materials file:

      # This is a comment
      # There must be 5 fields in each assigned texture!!

      CONSTANT     0,0,0,colour0,0
      SHADED       0,shade,0,colour1,0
      SINE         0,wavey,0,colour2,0
      BOTHSIDES    both,0,0,colour3,0
      BOTHSHADE    both,shade,0,colour4,0
      DOUBLESIDED  double,0,0,colour5a,colour5b
      DOUBLESHADE  double,shade,shade,colour6a,colour6b
      1SHADE2SINE  0,shade,wavey,colour7a,colour7b
      1SINE2SHADE  0,wavey,shade,colour8a,colour8b
      2SINE        double,wavey,wavey,colour9a,colour9b
      SAMPLESIDE   this is,an example,of what,you can,do!
      HIBITMAP     himap:,0,5,5

  Material names can be as long as ACAD allows!

  Currently there is a limit of 3000 points and 2000 surfaces to any DXF file.

  Version 0.2:

    REND386 .PLG files can now be converted.  Just enter the PLG  file  (.plg
    extension is important) and the file  will  be  decoded  correctly.   The
    information for the materials is just like DXF.  The 0x11AA in  the  .plg
    is scanned for and the corresponsing material is substituted.

    The materials file can now how the keyword RND in it to generate a random
    number   between  0  and  255.  This  may  be  useful  for  sine  texture
    mis-alignment.

  Version 0.3:

    Colons can be placed in materials to output text/data/comments after a
    polygon face definition.
     Consider a material like so
      MATERIALXY   0,mesh,0,colourxy,0:;hello there
     will return a face line like so
            dw 0,mesh,0,colourxy,0,1,2,3,6,7,1;hello there

    Bitmaps can now be defined in AutoCAD and then placed as part of an object.
    Notice how I used the new and fancy colon option?
     eg: a material of
      HIBITMAP     himap:,0,5,5   ;testtest
     will return a line of
            dw himap,29,0,5,5   ;testtest

    To implement the bitmap option, define a 3dface in AutoCAD   on  the  layer
    hibitmap.  DXF23DV will find the layer, match it up with the material,  and
    scan for the text "map" in the  material.  If it is found, it will make the
    surface into a bitmap.  This is good for adding  explosions/static  bitmaps
    to dead objects.  Check out XWING to see what I mean.

  Version 0.4:

    Connection data  is  sorted  according  to  surface  normal.   This  is  in
    preparation for iteration handling.

    Small bug with .PLG detection fixed. Also fixed a bug with the .PLG surface
    loading.  Who uses .PLG's anyway right?  Fixed...

    PFACES now work correctly