BUG: PullToSurface

I think I found I bug in the PullToSurface component tonight.

The input "PullStrength"'s tool-tip says you can enter "0 for Hard Constraint". Unless I'm reading that incorrectly, it seems to me that would be for when you want the force to be infinitely strong and make the point ALWAYS stay on the surface and not just be pulled toward it. If so, then when I try entering 0, the opposite happens. As would be expected without the tool-tip, entering 0 produces zero force on the point.

Hoping maybe it was a typo, I also tried "-1" as the input. That did not work either.

Anyone seen this before? Thanks!

Michael M.

Replies to This Discussion

Permalink Reply by Daniel Piker on April 26, 2013 at 3:38am

Hi Michael,

Thanks for reminding me of this. You are quite right, and this is fixed for the next release.

More generally there's a big change in the works for the way all 'hard' constraints operate in kangaroo...

Permalink Reply by Michael Makris on April 26, 2013 at 3:40am

Oh cool! Out of curiosity, know when abouts that'll be? If soon ill wait, otherwise I need to figure out another solution.

Permalink Reply by Daniel Piker on April 26, 2013 at 3:53am

I'm not committing to a release date yet...

What is the result you are trying to achieve? I expect we can find some workaround in the meantime.

Permalink Reply by Michael Makris on April 26, 2013 at 10:30am

Not a problem!

What I'm trying to do is establish a point that can freely slide in a plane with no resistance. Think, a roller on the ground. It can move in X-Y directions, but cannot leave the ground in the Z-direction.

So, I started out just using the AnchorXYZ component. This worked well at first. Through the combination of X-, Y-, and Z-Booleans I could specify which degrees of freedom I wanted.

However, now I need to allow that plane to vary beyond the orthogonal directions. I thought I had found the answers, as PullToSurface seemed to let the point slide along any input plane freely.

RSS