Re: [Update REQ 6025]: quaestions

[daemon]

> control the timing. What happens when my module generates data
> faster than geomview can display it? Can geomview send something
> to my module which ways it is ready for the next frame?

Yes.  You can use the GCL "echo" command to get Geomview to tell you
when it has finished executing all the commands you've sent it so far;
we use a procedure like the following:

    void SyncGeomview(FILE *togv, FILE *fromgv)
    {
      char buf[512];
      fprintf(togv, "(echo \"ready\\n\")\n");
      fflush( fromgv );
      do {
	fgets(buf, 511, fromgv);
      } while (strncmp(buf,"ready",5)!=0);
    }

Of course this assumes that "togv" is a pipe to, and "fromgv" a pipe
from, Geomview.  If you're running the program as a regular external
module, then these are just your program's stdin and stdout.

Note that the above procedure is not perfect --- if the fgets() in the
loop returns something other than "ready", presumably your program
would want to know about it, but the above procedure discards it.
You can modify it if necessary for your needs, of course.

Hope this helps,

--Mark