[Gegl-developer] DAGs make users' eyes cross

[Ken Bateman]

I've independently been thinking of a similar imaging core for the last month or
so.  Of course, I think it's a good idea.  Logically, behind the scenes,
everything should be in the form of a DAG.  But I think that a raw DAG does not
make up a part of a good user interface.  

Spreadsheets are in essence a DAG for performing numerical calculations, and I
would suggest that the user interface should take the form of a spreadsheet
since this is a model familiar to many users.   Some cells would contain source
rasters, other cells would contain paths, vector graphics, or masks (or even
references to other functions), some cells would contain a function that
referred to other cells for inputs, some cells could contain labels or comments,
and most cells would be empty.