[brlcad-devel] Question on adding Binary object data

[Alex V. <ale...@tr...>]

Hi all,

 

                I don't know if I should be asking for help on the dev
mailing list or not, but I suppose I will quickly be told to stop if
this is the incorrect procedure.

 

                I've been trying to add a binary file into a ".g"
BRL-CAD file using the 'rt_mk_binunif()' function. This seems to work
fine when I create a file using 'db_create()' followed by 'wdb_dbopen()'
and then add in the binary file using the 'rt_mk_binunif()' function.
However, if I want to open an existing file using 'db_open()' followed
by 'wdb_dbopen()' and then 'rt_mk_binunif()' I get an error from
'rt_mk_binunif()'. The error message is, "Error while adding new binary
object (object_name) to the database."

 

                The only differences I can see in the db_i structure,
which 'db_create()' and 'db_open()' return, are the dbi_eof and dbi_nrec
values. When I create the file the dbi_eof seems to have a valid value
and dbi_nrec is 1. But when I open a file, dbi_eof is -1 and dbi_nrec is
0.

 

                Is there a function call I am missing when I'm using the
db_open, or should I be using completely different functions to open a
".g" file and add a binary data object?

 

Thanks for any help, 

 

Alex Vlasse

Troy 7, Inc

ale...@tr... <mailto:Ale...@tr...>