[Repast-interest] agent accessing, please help

[Lene J. K. <ju...@si...>]

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:  <mailto:ju...@si...> ju...@si...
______________________________________