Friday, August 26, 2011
Houdini 11.1.36: The Gas Vorticle Forces DOP now properly updates all components of the velocity field, rather than just the x-component.

Thank you very much SESI, this bug was very aggressive.

I wonder why this result has occurred. because bug?

I check it in 11.0.775 and can not to repeat this. Look this playblast:

http://www.youtube.com/watch?v=USurO6qUKR8 [youtube.com]

At center - one vorticle with green color up-vector. I done three tests and you can see velocity streamers and advected red points of simple geometry - so changed not only X-component but all components of velocity.

Where and when this but?

well, I found that after increase grid resolution from 15 to 16 this force affect strange with (1,0,1) and (1,1,0) up-vector and affcect vel only in XY and XZ planes…