I will assume that it's my code and will make amendments.
Generally, the border and gridlines give me what I want
I use this small grid size so I can see the interaction of the agents and for basic design and then when we have what is required. 
Then I run larger grids of up to 3000 agents in a multiple batch run to gather large quantities of data.

Kind regards,


On 27 January 2017 at 21:02, Sean Luke <[log in to unmask]> wrote:
On Jan 27, 2017, at 9:51 PM, Stewart Aitken <[log in to unmask]> wrote:

> Here are the three files.
> If I initialise and then step singly it works completely as expected.
> However, if I initialise and then run that is when we see the duplication in the display frame.

I can't replicate that on OS X.  However, I do note that your code freaks out after about 41 agents because you run out of space in your grid, and your method placeFirstAgent(...) goes into an infinite loop.

> Re the Border edges, I can get them up to ObjectGrid2D( 45, 40) after this they just do not appear.

Hmm, just tried on my box with your code at 100x100 on a 400x400 window and both the gridlines and the borders look great.