Re: Plotting matrices on a Raster

[Paul Johnson]

Fabio Mascelloni wrote:
> 
> I'd like to plot on a raster a n*n matrix (currently 10*10) of float values
> in the range [0.0 1.0], each value corrisponding to a color, from black of
> 0.0 to red of 1.0, through all the possibles values.This was already made
> using Matlab
> (look at the attached pic) and I'd like to obtain a similar effect with
> SWARM.
> I've tried using Diffuse2D, for example, but without good results. I'm
> wondering if it's possible.
> Fabio.
> 
>   ------------------------------------------------------------------------
>                  Name: output.jpg
>    output.jpg    Type: JPEG Image (image/jpeg)
>              Encoding: base64

Use Value2dDisplay, that's a matrix in which you can put an integer in
each square to represent the colors. You can't put floats in there, but
you can scale your floating point numbers from 1 to 100000 or so to
approximate a scale.

The key is in getting the colors right in the Colormap in the
ObserverSwarm.  Know what I mean?  fix up the ColorMap.

The alternative is to redesign your simulation so that you have little
"wrapper objects" holding your floating point values. The wrapper can
sit on an Object2dDisplay and you can have the drawSelfOn method set the
color (which has to be an integer).

I've got a copy of heatbugs that I adjusted to have the bugs draw
themselves with the color to reflect their desired heat.  I put a copy
here
http://lark.cc.ukans.edu/~pauljohn/Swarm/MySwarmCode/coloredheatbugs-1.3.1.tar.gz

It might give you a hint.  I don't know of any reason this won't run
under Swarm 2.
-- 
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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