About Collision

[jmlg12]

Hello,

Is there some tutorial to explain how Collision Work?

Do we have to ungroup objects?

is it possible to also add "gravity" to the physical engine?

I'm trying to make a "Chain" and even if I can move some "link" manually and get some constraints but to lay "natural" I guess a little gravity will give more realism.

[JeanetteMathews · Accepted solution]

Hello!  Please look at this article for details on the collision based transform system:

https://substance3d.adobe.com/documentation/sg/collision-based-transformation-213061192.html

The basics are 

• Turn collision on in the tool options
• Enable collision for each object you want to interact
• Use the transform tools to move the objects

There's special behavior for groups - you don't have to ungroup objects but you can enable collision for sub-parts or the group itself. If you have collision on a parent/group then its children are treated as one object.

Stager does not have live physics - like simulations of gravity, wind, friction etc, yet.  It is only exposed through the transform tools.  However it is built on a physics engine that we plan to expose more features for in the future!

For a chain, I would make all of the pieces then select them all and move it together.  I will say this isn't probably the best case for collision - it's more usful for things like stacking books, putting obejcts on tables or leaning up against eachother.  We can make a better interface for something like chains though for sure ❤️