i m trying to visualize dna-microarray data in 3d space. as you maybe know such microarray datafiles are really huge. right now i am workin on a 20mb excell file holding 43000 rows and 90 columns. each row is represented by a sphere.
my patch now works perfectly for one sector on the microarray (== 883 rows)… as i expected performance drops when loading more and more sectors. - right now i have 10 sectors running but really very very very slow. i thought this performance draw back is because of the huge polygon amount. - the strange thing is that it doesn`t get better even when a reduce the sphere resolution to 2x2.
any idea how i can trick around to get a smooth navigation? do i have the draw back because of the parsing of the large csv file or because of limitations on the graphic side (bad graphic card - macbook pro 2y old).
i also have to admit that i am still a vvvv newbie as i really hardly use it.
happy to hear that its not actually really stupid patching ;)… thought of using RegExpr before but was a little afraid of the syntax (had some sleepless nights with regular expressions long time ago ;) )
2 little questions en plus:
is there any workaround for the reader node as it takes up to five minutes to load the 4mb file? would it make sense to use more than one reader and split up the data file?
is there any recommendable workaround on using spheres (i think of something like “points” with a shader applied to generate volume? or using particles?)
is this necessary?
couldn’t be those generated automatical?
then you could parse only that row of your table that you really need.
much faster this way."…
well yes - the actual data i will have to work on later won`t have any regular x/y distrubtion. x/y values will for example also represent known relationships and dependencies between various genes. - after all i will only get csv files with the results and i just wanted to test where the performance barriers are when working this way…
big thanks for the S+H, select and count hints. that was what i meant by stupid patching ;)…
why don’t you use just texture a quad (positioned with the sphere) with the appropriate information and only make it visible on rollover? seems to be the most simple method…which is also a way to get 2 renderers in one window…