Transparent background ?

arfgh · Post by **arfgh** » Mon Apr 14, 2008 6:53 pm

Is possible to set the scene background transparent ?
i tried with

driver->beginScene (true, true, SColor(0,0,0,0));

but not success. This show a pure black screen.

B@z · Post by **B@z** » Mon Apr 14, 2008 7:01 pm

uhm, what do you mean about transparent background? xD
are you want to see the desktop in your your game?

there isn't anything behind the background.
thats why its said BACKground

if you make this transparent.. then your window won't be seen

the meaning of transparent is that you can see the thing behind the transparent thing.
but what's behind the background?

:D:D

rogerborg · Post by **rogerborg** » Mon Apr 14, 2008 8:14 pm

It's turtles, all the way down.

I guess to show the desktop, you'd have to take a snapshot of the underlying screen without the window, then draw that as an image/texture in the Irrlicht window background each frame. It'd be pretty much platform specific.

Kriolyth · Post by **Kriolyth** » Mon Apr 14, 2008 9:15 pm

rogerborg wrote:I guess to show the desktop, you'd have to take a snapshot of the underlying screen without the window, then draw that as an image/texture in the Irrlicht window background each frame. It'd be pretty much platform specific.

A clean way to do it in Windows is calling SetWindowRgn et al., but it is truly platform-specific

hybrid · Post by **hybrid** » Tue Apr 15, 2008 8:23 am

It should be possible to create the underlying window in such a way that it can show a transparent background. I tried it with the framebuffer on my settop box, which does show the tv screen where transparent parts are. However, since it might introduce some performance problems, it shouldn't be the default mode, so we'd have to use a deive flag to create transparency supporting windows. Patches happily appreciated.