CollideSrf failing

Replies to This Discussion

Permalink Reply by Daniel Kautz on February 9, 2012 at 12:13pm

You could try constructing each of the 6 enclosing walls as a separate solid brep-object for collide srf.

Permalink Reply by Kameron Baumgardner on February 9, 2012 at 1:19pm

I tried that but now whenever the particles collide with the container they are becoming null which is messing with the distribution density i need.

Permalink Reply by Martin Dembski on February 9, 2012 at 1:59pm

Hi Kameron,

you don't get the error if you degrease the Strength value of the PLaw Component.

(I tested it with 0.47 and 0.52)

But I don't know yet exactly why this error occures.

Maybe you can also have a look at the SPM Plug-in for Grasshopper or at this post if you are just interested in particle collisions.

Best,

Martin.

Permalink Reply by Daniel Piker on February 9, 2012 at 2:27pm

Hi Kameron,

I found it works with collidemesh, but not with collidesurf.

I'm not sure what has changed to make the surface collision stop working, but I'll look into it.

Also - Repulsion forces with an exponent of -1 will tend to very quickly just push all the particles to the edges and corners.

If you are trying to distribute the points in the volume, I suggest using springs with cutoffs instead

Permalink Reply by Daniel Piker on February 9, 2012 at 2:35pm

here's an example file

Attachments:

• collide_win.gh, 8 KB