Re: [udig-devel] Re: [Geotools-devel] Rendering and UDIG -- Sanity Check

[James M. <jma...@ps...>]

>  - It generalize the geometry (i.e. apply a decimation) according the
>    current scale *before* to project the coordinates on the fly.
>    Concequently, there is much less points to transform --> faster
>    rendering.

Wow, how do you do that?  I would immagine that it is very hard to know how 
far apart two points will end up before re projecting in order to know if 
they will be coincident.  Or does this just refer to dropping polygons? 
(Still very cool)

>  - It is capable to transform straight lines into curves for some kind
>    of lines.

Also very cool.
One thing that would be useful here is a bit more info on what uDIG needs 
from its renderer, especially with regards precision.  I know that a key 
goal is to enable editing (as which point generalization gets in the way 
rather than being helpful).  I can see the need therefor for a distinction 
between 'background' or 'context' layers and 'critical' or 'reference' 
layers.  One cirtiesm of j2d was that it used floats instead of doubles, 
perhaps doubles are only needed some of the time?

James