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Re: [udig-devel] Re: [Geotools-devel] Rendering and UDIG -- Sanity Check
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At 11:14 AM 5/24/2004 -0700, Paul Ramsey wrote:
James Macgill wrote:
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?
Certainly JUMP, where the first use case was close-in editing at the micro
vertex error level, found that double precision was not only critical but
often not enough. When editing micro-topology errors, rendering mistakes
make the problems unresolvable by the operator.
Sorry, I did not mean to imply that double precision was not necessary,
just that it is only required for layers which are being edited, and that
their may be other 'display only' layers which would not need it. My main
point is, are their actually two sets of requirements for uDIG, one for
editable layers and one for non-editable layers...
James
