Rayfire 2. RayFireImpact OnImpact throw NullReference when rayfireRigid.ApplyDamage

[Flem100]

Hello there. I have imported Rayfire 2 asset into my project, as well as the UCC integration package.
Reproduce error:

1. Choose 1 of the green Cube game objects from the UCC Demo scene.
2. Remove Rigidbody and Collider.
3. Add Rayfire Rigid and the only thing in the integration; the RayFireImpact component.
4. Make the following changes to the Rayfire Rigid component:
   1. Initialization = At Start.
   2. Optional. In the Damage section. Enable = true. Error happens either way
5. Start the game and shoot at the cube with the Pistol.

The code dies here:
m_RayfireRigid.ApplyDamage(ctx.ImpactDamageData.DamageAmount * m_DamageMultiplier, ctx.ImpactCollisionData.ImpactPosition);

Because ctx.ImpactDamageData is null. It seems to be because the weapon is not an impact weapon like the grenade.

If I go into PistolWeaponRight and open Impact Module Group -> SimpleDamage and change it to UseContextData it doesn't help.

I looked at in a screen share with Cheo. He was the one telling me to try these things because I am still a noob with UCC .
His solution is to instead use the Health component and call the Rayfire functions directly from Damage or OnDeath events. That makes sense, but you might have a good reason to do it the other way and I would like your opinion before I continue.
Codex (OpenAI's "Claude Code"), suggests to edit SimpleDamage.cs OnImpactInternal() and set the missing properties after damage is calculated.

 

[Justin]

Are you running the latest version? This looks related to this:

Thread 'Null ref when delaying SimpleDamage'

Jan 31, 2026

Hello, when adding a very brief delay to the SimpleDamage module, we get this null ref error :

[Exception] NullReferenceException: Object reference not set to an instance of an object
Opsive.UltimateCharacterController.Items.Actions.UsableAction+<>c:<UseItemUpdate>b__134_0(Opsive.UltimateCharacterController.Items.Actions.Modules.IModuleUseItemUpdate module)(at ./Packages/com.opsive.ultimatecharactercontroller/Runtime/Items/Actions/UsableAction.cs:635)
ImpactDamageData.Copy() at ./Packages/com.opsive.ultimatecharactercontroller/Runtime/Items/Actions/Impact/ImpactCollisionData.cs:548
 546...

• Cheo
• Replies: 2
• Forum: Discussions

With that said, calling the methods explicitly will also work. I will take a look at that setup though because I would not expect the context to be null if it also has the SimpleDamage module.

 

[Flem100]

Hey Justin and thank for your quick reply. I have send a message to Cheo regarding the topic u referred to.

I was just wondering if there was a specific reason why you implemented the integration the way you did? I am afraid to implement it another way than yours and then find out later, that I should have done it your way. Using the Health component instead is very pretty different approach. Maybe you didn't do it that way or similar, because it's a problem when updating the asset to a new version?

 

[Justin]

The only reason is that not every project has health so I used the module system. There's no disadvantage to using the health callback but I couldn't depend on that because not every project uses health.