next »

[neothemachine]

Hi,

Is it possible with Xith3D to lay an object (.obj) into a scene, add some lights, textures and then start rendering and save a screenshot as RGBA to a file as soon as possible? And all that without having a visible window? It should behave like a console application. If it's not possible (yet?), what parts would need to be extended/changed?

Thanks for your answer,
neo

[Marvin Fröhlich]

Well, this is all possible. But I am not sure about the invisible window. At least you should be able to position the window outside of the screen.

[neothemachine]

Ok, well, I think I can live with a hidden window. But I'm currently having problems taking screenshots with alpha. When I change the boolean in shotEngn1.takeScreenshot(false); to true (example from XIN) then I still don't have a transparent but a gray background in the saved .png. Do I have to do something else?

[Marvin Fröhlich]

Hmm... no. Should work exactly like that. Then it seems to be buggy.

[neothemachine]

It seems I have to set an OpenGL clearing color (http://www.opengl.org/sdk/docs/man/xhtml/glClearColor.xml), e.g. black with alpha 0. And also set the requested alpha bits to 8 (http://download.java.net/media/jogl/jogl-2.x-docs/javax/media/nativewindow/Capabilities.html).

Do you know which commands let me do that in xith?

[Marvin Fröhlich]

canvas.setBackgroundColor() to set the clear-color.
I don't know about the requested alpha bits.

[lonesomeStranger]

@neothemachine: This can be interesting for you.

[neothemachine]

@lonesomeStranger: Thanks for the link but I also need "anti-aliased" transparency, i.e. pixels which have an alpha value between 0 and 1.

[Marvin Fröhlich]

@lonesomeStranger: Thanks for the link but I also need "anti-aliased" transparency, i.e. pixels which have an alpha value between 0 and 1.

So, you want an alpha channel, not anti-aliased transparency .