At 13:19 14/07/2004 -0700, Jan Schenkel wrote:
--- Alex Tweedly <[EMAIL PROTECTED]> wrote: > Someone pointed out earlier that these polygon > schemes limit me to a single > colour. That is indeed the very opposite of what I > need - the visualization > I want is done by colours. However, I'll have > typically a small number > (~4), and rarely more than 10-15 different colours. > So it won't be as fast > as a single polygon - but it should be within the > acceptable range. > > I'll do a proper write-up of the schemes and times > tomorrow (it's almost > 4am here :-) for the sake of the archives. > > Thanks again for all the help. > -- Alex.
Hi Alex,
As you have only a limited set of numbers, would it work if you create one polygon per colour and set the points ? This would cut the number of graphics down to the number of colours.
Yes, thanks Jan. That's more or less what I had in mind when I mentioned the relatively small number of colours needed. There will be a trade-off between number of graphics involved versus the size of each (not in pure drawing time - those seem to be very fast however big I make the graphic, but in re-building them as changes happen).
I'm trying to put together a semi-coherent description of what I've done, and what kind of times I get for different cases, to explore that trade-off, and hopefully to help anyone else who tries to use this fast-drawing technique. I've got the simple cases done (one polygon with many, many vertices draws real quick - but can take a bit longer to build), but still exploring the options for building (and modifying on the fly rather than rebuilding) multiple polygons.
However, if the layering of colours is important, this idea won't work.
I think I'll finish up using something more complex - a graphic per colour per subset of the data - but I'm a long way from putting enough of the app together to really know about that yet. Still at the "learning basic techniques in Revolution" stage.
btw - I spent a long time today trying to change the colour I was drawing in without success; finally got it - add "markercolor" to the list of Rev keywords I've learnt.
Thanks -- Alex.
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