Accumulation Buffer Creation

[darkprophet]

Hi all,
I was wondering if anyone could provide me with the initilisation part of the accumulation buffer.

All of the examples on the internet use GLUT to init their buffers/windows and basically im getting frustrated.

Under the Microsoft guide to opengl (its helpful btw), under glEnable(...) it doesn't list anything to do with the accumulation buffer....

Thank you, DP

[darkprophet]

anyone?

DP

[spasi]

Have a look at the full constructor of PixelFormat, it's one of the arguments (I've never tried it though).

[darkprophet]

Thanks spasi, that solved it. But my god, are Accumulation buffers slow!

DP

[spasi]

No hardware acceleration apparently. What card are you using?

[darkprophet]

Ati Radeon 9200 w/ 256mb ram. Latest ATI drivers...

Im using this for motion blur, it looks good i have to say, but i have found other alternatives that give good performance, e.g. render to texture and put that as an ortho quad on screen...

Thanks for your help spasi...

DP

[Orangy Tang]

Accumulation buffers are only supported in hardware in seriously high-end graphics cards - I think the ATi 9800 was the first. Delphi3d.net should have a list of compatible cards if you're interested.

[tomsen]

Thanks spasi, that solved it. But my god, are Accumulation buffers slow!

DP

Looking for the solution myself. I crash my Linux when trying to use the accumulation buffer without setting it up apparently ... could You pls give details how you set up an accumulation buffer?

-tomsen

(Edit: hm, sometimes it helps to be able to read. Read up on PixelFormat, will try tonight setting up a display with an accumulation buffer. )

(Edit II: Thinking about it, should this raise an exception? Like GL_INVALID_OPERATION or such? I try to use a buffer that is not there and the system locks up completely. Just a thought ...