Re: Multiple Value2dDisplay's on a single Raster

[Doug Donalson]

Rick,

   I have dealt with a similar problem.  I have set up a meta-population model

where there are 4 agents.  Each 2D cell contains a subpopulation.  I wanted
to display the densities of each agent in each subpopulation as intensity
like heatbugs displays heat.  I played around with doubleing the X and Y
sizes of the 2D and then mapping the 4 densities into 4 2D cells representing
the for agents.  I came to the conclusion that although I could eventually
do this, but it wasn't necessarlly a good idea.  I think that, at least
potentially,
displaying different landscape attributes sisde by side in a spatial map can
quickly become very hard to read.  I ended up creating four 2D displays,
one for each agent, and this has turned out to work quite well.

For what its worth...

Cheers,

   D3

Rick Riolo wrote:

> I have a student who is extending the SugarScape that
> Nelson Minor provided.   One issue is how to display
> on a single Raster both the sugar and spice values.
>
> It would be best would be if these were displayed in two different colors,
> though the SugarScape book just displays them as one color
> (because the hills are in different parts of the world).
> I suppose if there was overlap (ie some cells with some of each
> resource...I don't know if this happens in the SugarSpace book
> examples or not), one color could overwrite the other.
>
> As far as I can see, this can't be done directly with
> the current Value2dDisplay (at least in version 1.0.5).
> In this case if one sets up 2 Grid2D's to hold the different
> kinds of values, and has 2 Value2dDisplays mapping those
> to the same raster, whatever gets written second over-writes
> *all* of the Raster, ie., the zero values are not transparent
> so that in effect only the second to be written values
> are seen in the Raster.
>
> Is there any way to do this easily in the current Swarm?
> Are there any plans for this?
>
> (One hack: have a combined Grid2d for the values,
> combine the two types of values in that one object, and have one
> Value2dDisplay map from there to the Raster.  This would
> work ok I imagine, but the resources would be the same color.)
>
> Another solution would be to do the writing to the Raster
> without using Value2dDisplays, I suppose.
> Sounds like lots of work to me.
>
> One solution might be to write a Values2dDisplays,
> which would accept multiple sources of data, and
> allow the user to specify that a certain value is
> "transparent".
>
> Any other solutions or ideas about this?
> Thanks.
>
>  - r
>
> Rick Riolo                           address@hidden
> Program for Study of Complex Systems (PSCS)
> 4068 Randall Lab
> University of Michigan         Ann Arbor MI 48109-1120
> Phone: 313 763 3323                  Fax: 313 763 9267
> http://www.pscs.umich.edu/PEOPLE/rlr-home.html
>
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