[rules-users] Drools Planner changing problem fact

[Ralph Schwitalla]

Hi all,
i am new to drools planner and try to model a 2dimensional rectangle packing
problem. 
I have some problems modelling the problem facts because one of them (the
list of free spaces) is constantly 
changing.

For example I have a list of rectangles I try to pack on a fixed size layer.
This list is fixed. 
But the list of free space is dynamic (first you have the whole layer as
free space, 
then you cut out the space occupied by the first rectangle which gives you 3
remaining free spaces, and so on)

All the examples in the drools-planner-examples seem to have a fixed list of
problem facts (rooms, teachers, timeslots) which only should be combined
optimally. 

How can a dynamic number of problem facts be modelled?

Greetings Ralph 

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