#### 9.4.2 Transporting Mathematica Files to Geomview by Hand

The auxilliary function `WriteChunk` is for those who can only use Mathematica on a computer that Geomview isn't installed on. `WriteChunk[`file`,` graphics`]` generates a file named file which contains the graphics object graphics in the format accepted by `math2oogl`.

You can transfer that file to a computer that has Geomview installed on it and then use the programs `math2oogl`, `oogl2ri`b, and `geomview` directly from the shell. These programs are distributed in the `bin/<CPU>` subdirectory of the Geomview directory, and may have been installed so that they are on your `path`.

         In[1]:= <<OOGL.m

         In[2]:= Plot3D[ Sin[x + Sin[y]], {x,-2,2}, {y,-2,2} ]

         Out[2]= -SurfaceGraphics-

         In[3]:= WriteChunk["mychunk",%2]

This writes the file `mychunk` which contains a description of the graphics object. You can then transfer this file to a system with Geomview and type

         math2oogl < mychunk > mma.oogl

to convert it to the OOGL file `mma.oogl` which you can then view using Geomview. This is the equivalent of the `WriteOOGL` command.

For a result equivalent to the `Geomview` or `Show` commands, type

         math2oogl -togeomview Mathematica geomview < mychunk

The `WriteRI`b command can be emulated from the shell as

         math2oogl < mychunk | oogl2rib -n mma.tiff