Re: [Repast-interest] agent accessing, please help

[Jonathan O. <jo...@an...>]

Hi Lene,

A quick question. Does the line:
> NdPoint point2 = space getLocation(anOtherAgent);

contain a typo? There's no "dot" between space and getLocation. I'm  
assuming it's just a typo.
Are you saying that the line:
> double anOtherAgentX= point2.getX();
doesn't throw a NullPointerException but the line:
> double anOtherAgentY.point2.getY();
does?

Jonathan

On Jul 12, 2009, at 10:19 PM, Lene Jung Kjaer wrote:

> I wrote earlier today regarding an agent accessing an other agent's  
> x and y coordinates in a method. I need to calculate the vector  
> distance from one agents location to another agents location.
> I have tried:
>
> .....
> NdPoint point = space.getLocation(this);
> double oneAgentX = point.getX();
> double oneAgentY = point.getY();
> NdPoint point2 = space getLocation(anOtherAgent);
> double anOtherAgentX= point2.getX();
> double anOtherAgentY.point2.getY();
> .... this one throws a java.lang.NullPointerException.
>
>
> I've also tried to just use getter methods for x and y:
>
> anOtherAgentX = anOtherAgent.getX();
> anOtherAgentY = anOtherAgent.getY();
>
> again, I get a java.lang.NullPointerException.
>
> or
> anOtherAgentX = anOtherAgent.x;
> anOtherAgentY = anOtherAgent.y;  still no luck
>
> Does anyone know what I'm doing wrong??
> Please, I could really use your help.
>
> Thanks,
> Lene
>
>
> ______________________________________
>
> Lene Jung Kjær, PhD. Candidate
> Cooperative Wildlife Research Laboratory
> Southern Illinois University
> Life Science II, Room 269B
> Carbondale, Il 62901
> Phone office: 618-453-5495
> Fax office: 618-453-6944
> Phone home: 618-303-6136
> Email: ju...@si...
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