Re: Swarm GUI question: addHeatbug @ object copying

[Rick Riolo]

Paul,

You can't do it in the standard distributed heatbugs.
That part of that tutorial is out of date.

One way to do it is to encapsulate the part of
HeatbugModelSwarm.m that actually creates bugs in
a seperate createBug method, and then add a probe to
send that message to the ModelSwarm.  Or you could
add a copyBug method and have a probe for that.
See the UM-HeatbugsPlus version of heatbugs for an
example of this and other features at
  http://www.pscs.umich.edu/LAB/Doc/SwarmStuff/UM-swarm-index.html
along with an edited version of that tutorial on probes.

- r

Rick Riolo                           address@hidden
Program for Study of Complex Systems (PSCS)
4477 Randall Lab                
University of Michigan         Ann Arbor MI 48109-1120
Phone: 734 763 3323                  Fax: 734 763 9267
http://www.pscs.umich.edu/PEOPLE/rlr-home.html

On Sat, 3 Apr 1999, Paul E. Johnson wrote:

> Date: Sat, 03 Apr 1999 16:57:34 -0600
> From: Paul E. Johnson <address@hidden>
> To: Swarm Support <address@hidden>
> Subject: Swarm GUI question: addHeatbug @ object copying
> 
> I never tried to play around with the gui objects before, but now I
> think I may teach this and write a bit about it.  This has me stumped. I
> found a nice little tutorial by Nelson M in here:
> http://www.santafe.edu/projects/swarm/archive/list-archive.9608/0015.html
> 
> This is quite a nice tutorial and wish I'd seen it before.  ANyway, I
> guess there is one feature outdated:
> 
> It says you can use the "copy" method of the Object class to create a
> new heatbug, and then drag that ouput to the addHeatbug slot in
> ModelSwarm.  When I try that, I get this:
> 
> *** event raised for error: BlockedObjectAlloc
> *** function: _i_Object_s__copy(), file: DefObject.m, line: 549
> > Requested operation is defined by the Object superclass of the GNU
> > Objective C runtime system, but is blocked from usage because its default
> > implementation is incompatible with the model of zone-based allocation
> > established by the defobj package.  To allocate, free, or copy objects
> > that use the defined model of zone-based allocation, one of the messages
> > create:, createBegin:/End, drop, or copy: must be used instead.
> *** execution terminating due to error
> Aborted (core dumped)
> 
> >From the GUI, I can't see how to create a heatbug to drop into the
> addHeatbug slot.
> What do you think?
> 
> Please don't tell me this is a simple question that I could just read
> about in a manual.  Believe me, I tried...
> 
> -- 
> Paul E. Johnson                               email: address@hidden
> Dept. of Political Science                    
> http://lark.cc.ukans.edu/~pauljohn
> University of Kansas                          Office: (785) 864-9086
> Lawrence, Kansas 66045                        FAX: (785) 864-5700
> 
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