unfolding: offscreen maps?

basil.sto..

in Contributed Library Questions • 1 year ago

Hi,

I'm making an app, which displays "real" landscapes as a 3d-surface. For the elevation i use srtm heightmaps ( http://srtm.csi.cgiar.org/) and for the texture i use unfolding maps, which I copy from the screen buffer to the texture.

Works fine so far...

Now I want to eliminate (interactive) the screen-buffer using an (non interactive) offscreen buffer. But ideas like letting unfolding draw on a offscreen PGraphics does not work.

Any suggestions?

Basil Stotz

Replies(1)

tillnm

Re: unfolding: offscreen maps?

1 year ago

Hi Basil,

Can you explain in a bit more details what you are trying to do?

Unfolding is using an offscreen buffer itself (if inititated with GLGraphics), and you can use the texture directly. Maybe you are doing that already - not completely sure what you mean by screen buffer.

Here's how you can get the current map from its internal offscreen buffer.

PGraphics pg = map.mapDisplay.getPG();
if (pg instanceof GLGraphicsOffScreen) {
screenshot = new PImage((int) map.mapDisplay.getWidth(), (int) map.mapDisplay.getHeight());
((GLGraphicsOffScreen) pg).getTexture().getImage(screenshot);
} else {
// just in case the map is not using glgraphics
screenshot = pg.get();
}

If you want to get the texture without drawing the map on screen, you need to write your own MapDisplay subclass and implement getPG() and potentially postDraw() yourself. If that's the case, let me know, and I can give you some pointers.

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