>Larry, you really know how to use a search engine :-) . One of the advantages of Google Mail...
Larry On 10/1/07, Michaël Michaud <[EMAIL PROTECTED]> wrote: > > Hi, > > Larry, you really know how to use a search engine :-) . > > You're right, these experiments did not involve points and I really have > no idea about how to display a point faster. The idea in these mails was > that a single pixel is enough to display all the features included in a > rectangle which is less than a pixel size, and that quadtree or rtree > structures can give us such an information before features to display > are entirely parsed or decimated. > > Michaël > > Larry Becker a écrit : > > > Hi Michaël, > > > > I was referring to this note in Java2DConverter: > > > > // [NOTE] I tested a short-circuit here to return a 1 pixel > > representation of > > // geometries having an envelope of less than 1/2 pixel, but I > > get only an ugly > > // render for a small performance improvement [mmichaud - > > 2007-05-23] > > > > and your post of March 9, 2007: > > > > "PS : my experience to use a spatial index to accelerate graphic display > > when there are many features to display : > > I made some experiences in the past using a quad tree and a technique > > which is quite close to yours : > > as soon as I reach a cell of the spatial index which is less than one > > pixel > > size (or 1/2), I just displayed the pixel instead of reading all the > > features." > > > > But perhaps, your experiments didn't involve points. > > > > regards, > > Larry > > > > _______________________________________________ > jump-users mailing list > [email protected] > http://lists.refractions.net/mailman/listinfo/jump-users > -- http://amusingprogrammer.blogspot.com/
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