April 2013


Options: Use Monospaced Font
Show HTML Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Mark Coletti <[log in to unmask]>
Reply To:
MASON Multiagent Simulation Toolkit <[log in to unmask]>
Mon, 8 Apr 2013 22:05:40 -0400
text/plain (2091 bytes) , text/html (3834 bytes)
I think the problem is that the spatial index isn't being informed of the
object removal.  Again, removing objects from the spatial index is
potentially expensive, which is why it no longer automatically happens when
the user removes or otherwise changes an object's position -- when the
spatial index is rebuilt is a design decision left to the implementor as
they'd presumably know best when to do that.

In other words, I think I resolved your problem by adding the following to
your Sim.start():

        schedule.scheduleRepeating(new Steppable()
            public void step(SimState state)


However it might be more efficient to trigger such an event only when
something is actually removed or otherwise has its position changed.

On Thu, Apr 4, 2013 at 4:00 PM, Luís de Sousa <[log in to unmask]>wrote:

> Hello again,
> In attachment a little sample showing this last situation I reported. The
> Trailer agents continue to be drawn after the stop() method is invoked, and
> even when the simulation is restarted.
> Regards,
> Luís
> On 27 March 2013 21:07, Luís de Sousa <[log in to unmask]> wrote:
>> Hello again,
>> I noted today that geometries that have been removed using this method
>> continue to be drawn in the display. I have an Agent class that
>> inherits from MasonGeometry; this particular agent can "die" during
>> simulation and its stop() method is invoked. When this happens with an
>> agent stored in a Continuous2D, for instance, invoking the remove()
>> method is enough to prevent it from being drawn again.
>> After invoking removeGeometry() is there anything else referencing the
>> geometry?
>> Thank you,
>> Luís
>> On 21 March 2013 18:58, Mark Coletti <[log in to unmask]> wrote:
>> >
>> > I've added removeGeometry() and committed the changes to subversion.  Be
>> > aware that removing things from t he spatial index can be expensive in
>> > addition to removing things from "shadow" Bag of Geometries.
>> >
>> > Cheers!
>> >
>> > Mark

[log in to unmask]