[VFX Graph] Slow down or stop VFX / programmatically access Rate from Play Controls?

Hi, how do I slow down/stop the particles of a VFX graph programmatically? Just like pulling the "Rate" slider in the VFX Play Controls in the scene editor down to 1. Can I somehow access the Rate of the Play Controls or is there another way?

 

@jakobskote just the same way as you can control other parameters, but you have to do it from code. I'll attach example in a moment.

Code (CSharp):

1.  
2. // Remember to include this
3. using UnityEngine.Experimental.VFX;
4.  
5. public class AdjustParticleParams : MonoBehaviour
6. {
7.     // Your visual effect gets assigned to this in UI (or do it in code)
8.     public VisualEffect vfx;
9.  
10.     [Range(0,1)] public float playRate;
11.  
12.     void Start()
13.     {
14.         vfx = GetComponent<VisualEffect>();
15.     }
16.  
17.     void Update()
18.     {
19.         vfx.playRate = playRate;
20.     }
21. }
22.  

If you want to control your own, arbitrary parameters you might have exposed in the Blackboard of the VFX Graph, you can do it this way:

Code (CSharp):

1. public VisualEffect vfx;
2. public string exposedParameterName = "Spawn Rate";
3. [Range(0,1000)] public int spawnRate;
4.  
5. void Start()
6. {
7.    vfx = GetComponent<VisualEffect>();
8. }
9.  
10. void Update()
11. {
12.    vfx.SetUInt(exposedParameterName, (uint) spawnRate);
13. }

Expose it like this:


It should look like this in Inspector:


Then connect it to the Spawn node (well, it could be anything...)

 

@Olmi Awesome! Thank you so much for such an extensive reply.

 

It doesn't work for me and I have the same setup as @Olmi (I can even see in the inspector the property value that changes, but the particles spawn at the same rate)