[fixed]OpenGl stencil not wide enough

zotlerg · Post by **zotlerg** » Fri Feb 13, 2009 11:42 pm

Hello, I'm rendering a small scene into a 1024x400 window (using example 14) on the PC using Irrlicht 1.5.
While using stencil shadows, I noticed that the width of the shadow stops in a straight line, as if its border was set to 400x400.
If I render to 1024x128 then the stencil seems to stop at 128x128.
In DirectX everything is fine. This is just OpenGl on PC for me.
I've not tried this on the Mac, but I need it to work on the Apple for a project.

Thanks,
Dave

bitplane · Post by **bitplane** » Sat Feb 14, 2009 8:03 pm

Looks like you're right, I didn't try in 1.5 but shadows are completely broken in OpenGL in SVN at the moment. Setting the window size like you said gives a shadow coloured overlay to the a 400x670 region in the middle of the screen (so far only tested in Windows)
So the stencil OpenGL stencil buffer is bugged in 1.5 and completely broken in 1.6. No time to try this on the Mac at the moment, but thanks for the report.

hybrid · Post by **hybrid** » Sat Feb 14, 2009 10:41 pm

I cannot reproduce this, not in 1.5 and not in trunk. Can you please give a screenshot for this problem? Does your device size exceed your desktop size? Do you use fullscreen or windowed mode? Since OpenGL does not have a square dimension restriction (as opposed to older DX) it could only be a projection problem or something like that. But I have no clue ATM.

bitplane · Post by **bitplane** » Sun Feb 15, 2009 2:37 pm

Additional info, if this helps

Note that this is my new PC running Vista 64 and I've only just got it set up for development so haven't tried this example on it before. I'm going to be out for a couple of hours but will try in 1.5 and on the Mac when I get back.

bitplane · Post by **bitplane** » Sun Feb 15, 2009 11:25 pm

OSX shows the stencil buffer size bug in trunk-

update: tracking

zotlerg · Post by **zotlerg** » Mon Feb 16, 2009 9:58 pm

I happy to know I'm not the only one with this, could it be that the shadow volume is being 2D clipped rather than the stencil being the wrong size?

bitplane · Post by **bitplane** » Sun Mar 15, 2009 12:37 am

The grey shadow overlay over the whole screen was a typo in svn trunk, which is now fixed in svn. The original bug zotlerg reported is still present.

hybrid · Post by **hybrid** » Tue Apr 21, 2009 12:03 am

This bug is now also fixed, was a projection error.