Re: raster and aspect ratio

[John Carnahan]

Nelson,

> Such a thing would be possible, but it's not clear it's desireable.
> Reading data off an X window is very slow - is there some easy way for
> you to store your data elsewhere so you can read it when necessary?

Sorry I did not explain myself the first time.

In my case, with a large world, it might be necessary. I currently scale 
my world to the display using linear transform of x and y.  What I want 
to do is not let a mosquito draw over a hut (if you remember my 
simulation). I cannot do this by just checking if they are in the same 
location in the simworld since even if they are not it may translate to the 
same point in the display window. For now I simply have the hut objects draw 
themselves every time step which seems like a waste. So I thought it 
might be convenient to just display them once and if a mosquito is in a 
hut - it does not display itself (which makes sense from an OOP 
standpoint). Another alternative would be to hold the hut positions on 
the display as sacred and not let the mosquitoes draw over them but this 
would entail modifying the Raster.m code. So I guess it just depends on 
what is most efficient: Getting the color at a position, drawing the 
object each time (this really hurts with a ton-o-objects) or keeping a list 
of sacred points in the display. I thought that the first option would be 
the most effective. What do you think?

Thanks,
JohnC