`LinkManager` is for NetLogo links
<http://ccl.northwestern.edu/netlogo/5.0/docs/programming.html#links>,
which are a type of visible agent in NetLogo and not exactly an
abstraction for data correlation.
What's the purpose of your correlation of turtles with other data?
NetLogo doesn't really have anything built in for saying that a turtle
is related to some other data. I'm not sure I'm understanding your
goals correctly, but, if I am, it sounds like you just want to run
NetLogo headlessly and provide your own version of the NetLogo view,
which, of course, is kept in sync with the state of the model as it
progresses. Is that right? If so, and if you're dealing with the code
from the 'headless' branch of NetLogo, then take of a look at
'org.nlogo.mirror.Mirroring
<https://github.com/NetLogo/NetLogo/blob/headless/src/main/mirror/Mirroring.scala>'.
Using that and its `diffs` method, you can find out what variables have
changed in the model since your last snapshot, and then update your
visualization according to that diff.
On 05/19/2014 02:01 PM, Brant Horio wrote:
Hello all,
I am currently working on calling NetLogo headless from Java for the
purposes of doing my own non-NetLogo visualization, primarily as just
an exploratory programming exercise. I am coding in Java and have been
able to successfully read in and iterate through the turtle agent
list, reading in agent attribute values, coordinate positions, etc,
for the visualization. I do so by:
public static HeadlessWorkspace workspace =
HeadlessWorkspace.newInstance( );
public static Iterable<Agent> netLogoAgentList;
netLogoAgentList = workspace.world( ).turtles( ).agents( );
... after which I iterate through netLogoAgentList to get the variable
values, etc that I need for my visualization.
What I am envisioning is that for each of these agents read in, I
create an agent object in Java that carries the read in variable
updates from its NetLogo counterpart and my own methods for the
visualization. I also want these agent object to carry with them an
ArrayList of other agent objects that they are "linked" with, as
informed to them by updates from the NetLogo model. Are there any
suggestions out there for the best way for me to do so? I suspect it
will involve LinkManager, in particular LinkManager.findLinksWith( ).
My current strategy (though I have found no success yet) is to do the
following:
1. iterate through netLogoAgentList, and cast as (Turtle).
* netLogoAgentList = workspace.world( ).turtles( ).agents( );
* for (Agent t : netLogoAgentList)
{
Turtle tmpAgent = (Turtle)
workspace.world().turtles().agent(t);
}
2. for each Turtle agent, tmpAgent, call LinkManager.findLinksWith(
), using tmpAgent and workspace.world( ).turtles( ) as arguments,
the idea being I can get back an agent set of all turtles linked
to or from turtle tmpAgent.
3. Store the linked turtles to my Java agent object in the previously
mentioned ArrayList, allowing me to later iterate through the list
and plot out the links in the NetLogo network in my visualization.
I am produce perhaps some of the ugliest code around so I apologize if
I'm totally off base in my pseudo code/approach/thought process. I
have tried a bunch of different things though and cannot seem to get
what *I think* I should be able to get back from LinkManager, which is
the turtles that each one is linked from/to. Any advice for how to
best access the API to get this data would be very much appreciated.
THANK YOU IN ADVANCE!!!
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