Re: Drawing 25 000 Shape fast

Andrey Kuznetsov a écrit :
i have to render 25 000 "points" with each one a specific fill color, and a specific Shape (java.awt.Shape or customized) in a JPanel.

Drawing every Shape, one by one, is too slow (panning the view ins't smooth). So i tried to create a BufferedImage for each point, and render them instead. But it is even slower.

Direct : 3 sec
BI: 4.5 sec

I need to reach 0.1 sec by any mean. Right now i'm thinking to add some kind of Z-buffer but with aliasing it's pretty hard i think. Trying ideas take time so i'm asking if somebody can help me.

And all the BI take about 60 Mbytes of memory, which is a lot.

use one BufferedImage.
You need to draw your shapes to BI only if something changes.

I already use this. But it's unusable if one of these events happen:
- pan (let's say that i'm at Zoom Factor 2000)
- zoom
- resize
- the user want to map column 3 instead of column 4 for colors OR size of the shape OR type of shape

.

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