Tiger flashing in OpenGl

[Ted Taylor]

Since installing Tiger, the following has started when OpenGL is the rendering engine. No problem with internal 3d engine.

When selecting something in 3d window , the window flashes totally white twice. When moving viewpoint it only flashes once. Tried it with and with out hardware acceleration. Tis a bit annoying. Any body else running into this?

[rm]

I'm starting to wonder if it is a common library part we are all using, or some setting in preferences for redraw that is causing the problem.

[__archiben]

rm wrote:
...or some setting in preferences for redraw that is causing the problem.

has anybody been able to verify or disprove my earlier post? i can only get the flashing when the 3D window background setting is set to 'As in Photorendering Window' and the photorendering window contains an image as the background . . .

anybody?

~/archiben

[Anonymous]

"has anybody been able to verify or disprove my earlier post? i can only get the flashing when the 3D window background setting is set to 'As in Photorendering Window' and the photorendering window contains an image as the background . . .

anybody? "

I get just the opposite. The flashing goes away when I change my 3d Window background from 'Single Color' to 'As in Photorendering Window' and select a photo background. I had tried this earlier and got rid of the flashing, but then my 3d navigation was taking a seriously long time to start. I would click and drag to rotate, for example, and the view wouldn't start changing for 6 seconds. But with the project I have open at the moment the photo background gets rid of the flashing and I don't have a delay anymore. It's a fairly large model for us, so I don't think the model complexity is the difference.

So it seems that monkeying with the background settings could help.

Steve Campbell
ArchiCAD 9.0(US) latest build, OS X 10.4, Power G5 Dual 2.0 GHz

[__archiben]

Steve.Campbell wrote:
So it seems that monkeying with the background settings could help.

yeah - i managed to disprove my own theory last night. but i'm sure that the background does have something to do with it . . .

~/archiben

[Anonymous]

I think changing the background just slows down the redraw of the 3D window enough that it doesn't look like a flash anymore. It looks like what we're seeing is the 3D window goes completely blank then the model redraws the objects from farthest away to closest.

With a single color background this happens so quickly it looks like a flashing of the screen if your background has a light color. With the photo background it slows down so it's less annoying.

So maybe this redraw sequence has always been there but now with Tiger it's slowed down slightly so now we're able to see it.

I also noticed that the model I was testing with yesterday at first didn't have it but as it was open longer the flashing returned with the photo background.

Steve Campbell
OSX 10.4.1, ArchiCAD 9.0 (US) latest build, PowerMac G5 Dual 2.0 Ghz