Works in build 581
Does not work in 543.9

How odd. Thanks guys!

Hmmm….still doesn't work in mine.
I'll reinstall…

Hi all,
Again, I was pulling my hair out with this one, even though it's one of the simplest setups imaginable.

• Added a Sphere
  Made into an RBD Object
  Number of Objects set to 4
  Initial State > Position X set to $OBJ*2
  
  
  Works as expected in H11, but in H12 there is no x offset.
  
  Any ideas?

Hi all,
This should be a quick one. I've been trying to get some constraints to work with the Bullet solver, but without much luck. The RBD solver and constraints work great, but RBD is a touch slow.
I've looked at the help file in H12. Bullet is the default solver engine, so I thought that it would implement all the basic constraints. The help file also states “Currently, bullet does not work perfectly with spring constraint.” as a limitation of the Bullet solver, further implying that other constraints work ok.

However, if I try to apply an angular constraint, I get this error:
“the attempted operation failed.
Only RBD objects solved with the RBD engine are supported”
The scene linked below has a pin constraint, but it appears to be non-functional when using Bullet.

So, what is the deal with Bullet? Does it respect constraints or doesn't it? If it does, how do I get them to function?

NB: File for this is the same as another thread:
http://www.sidefx.com/index2.php?option=com_forum&Itemid=172&page=download&id=11201 [sidefx.com]

Sadhu, I tip my hat to you.

The problem I'm experiencing trying to learn Houdini is that tutorials tend to just tell me to use the shelf tools, so when something goes wrong, I've got no idea how to use the nodes that the shelf tools have implemented.
I need a better grounding in all the constituent nodes I think.

For that reason I just want to say thank you to you and all the other people who take time to write replies to people like me. If it weren't for people like you, I'd be totally stuck with no way of progressing, so thanks again.

I may have sorted it out (well, sort of, please read on). I had to re-setup the simulation, rename my fractureparms node so the rigidbodysolver network referenced it (there are a lot of nodes in there).

If someone knows what was wrong with the original scene I'd still like to know how to repair it, as starting over isn't really a fix.

Thanks!

Hi all,
I continue to be bamboozled by the Dop import node I'm afraid.
I've set up a simple sim of a sphere hitting a wall which then shatters. I wanted to texture the inside parts different to the outside parts so I attached a material node, which did not work.
Even though the simulation appears to work absolutely fine, the wall crumbles, the Dop import node says that it has no data, as shown in the image.

I keep coming across this problem with the Dop import node and I don't know why.

Thank you!
I changed the object reference in my ground_points object_merge1 node to point to the grid as opposed to the dopimport1 (the node you said to delete).
I'm guessing that created some sort of circular reference in the DOP network?

I must read up on the finer points of DOP networks (any links to tutorials would be appreciated)

Thanks again!

Hello?
Can someone else confirm this at least? Maybe it's a bug or something.

Thanks for the reply circusmonkey.
Unfortunately, I've already tried what you suggest and it does not work.
I've attached a video showing my attempt at doing this and what happens.

Hi all,
I'm trying to follow along with a tutorial that was done in H9. I'm currently using H11 as H12 is a bit unstable for me.

Anyway, all I'm trying to do is an RBD Point object simulation.
I have a grid set up as a static object, a sphere which is to be copied to the final object, which is a object merge of the grid with one hundred points scattered over it.
I've attached the scene.

I then deselect everything, click on RBD Point Object, select the scattered point object, hit enter, select the sphere, hit enter and nothing happens.

The rbdpointobject node shows an error saying ‘non_instanced_objects’, ‘invalid source…’

I know it's a super simple scene, but I just don't know what's wrong as I'm very new to Houdini.

Any help would be appreciated.