Question Applying forces from within C# jobs ?

Hello,

I have a buoyancy code that calculates the forces on each triangle of the collider mesh. I want to optimize it with C# job, all the calculations per triangle are independent and should be easily implemented in multi-threading.

So I'm learning C# jobs, and this question arises : is it possible to apply a force on the rigidbody from within a job ? If yes, how can we reference the rigidbody in the Execute() ? If not, should I store all the force in a native array and loop again in the main thread to apply the forces ? Doesn’t seem very optimized.

 

You can't use component references in C# jobs. A job can only access blittable data types.
Unity does have

IJobParallelForTransform

which I tried to use for projectiles. But that experiment lead me to other performance problems due to managing the

TransformAccessArray

.
So in my own experience experimenting with C# jobs using GameObjects is more annoyance than performance.
I might've done something wrong perhaps.

ECS works a lot better with the C# job system, but ECS is still experimental and also a whole different way of doing things.

 

Thanks for your answer ! I've seen your post, it's the only result I found on the internet.

So I will try to make a force array as an output, and loop it in the main thread to apply the force on the rigidbody. The main overhead is by computing the waves which definitely need some multi-threading.

 

Yeah it'd be nice if there were more examples out there using GameObjects and components. Something in a dynamic changing environment.
All examples I found of the C# job system use a pre-filled non-changing array rather than adding and removing elements.
Especially in my case with projectiles they get active and inactive a lot.

 

I thought C# jobs was more mainstream, it seems that we have to invent solutions on our own.