[TF2] Iron Bomber projectiles have a 3x-4x larger hitbox compared to other Grenade Launchers

[AzureWoof]

The Iron Bomber has a more generous area of where you can aim that allows your projectiles to hit enemies compared to all other Grenade Launchers. The gif below shows that the Iron Bomber can hit shots that other Grenade Launchers cannot without moving at all. This isn't stated in it's stats, so it's most likely a bug.

Update (9/5/20)

Upon further investigation, it seems as if the issue resides in the size of the Iron Bomber projectile's hitbox. (Left: Grenade Launcher/Loch-n-Load) (Middle: Loose Cannon) (Right: Iron Bomber)

[AzureWoof]

Edited the post with new information regarding the issue.

[sapphonie]

Could you include instructions on how you recreated this?

[wgetJane]

[Transmuntana]

I still think that the programmers messed up and mixed the hitboxes of the Loose Cannon and Iron Bomber. Like seriously how does a big-ass cannonball have such a small box?

[wgetJane]

I still think that the programmers messed up and mixed the hitboxes of the Loose Cannon and Iron Bomber. Like seriously how does a big-ass cannonball have such a small box?

they were not mismatched, all of the grenades are supposed to have the same 4x4x4 size of bounding box

the iron bomber's bounding box is larger than it should be because its custom_projectile_model item attribute causes its model to be changed after its bounding box size has been set to 4x4x4, overwriting it

changing an entity's model also changes its bounding box size because the UTIL_SetModel calls SetCollisionBoundsFromModel

https://github.com/ValveSoftware/source-sdk-2013/blob/0d8dceea4310fde5706b3ce1c70609d72a38efdf/mp/src/game/server/util.cpp#L1330

[Transmuntana]

I still think that the programmers messed up and mixed the hitboxes of the Loose Cannon and Iron Bomber. Like seriously how does a big-ass cannonball have such a small box?

they were not mismatched, all of the grenades are supposed to have the same 4x4x4 size of bounding box

the iron bomber's bounding box is larger than it should be because its custom_projectile_model item attribute causes its model to be changed after its bounding box size has been set to 4x4x4, overwriting it

changing an entity's model also changes its bounding box size because the UTIL_SetModel calls SetCollisionBoundsFromModel

https://github.com/ValveSoftware/source-sdk-2013/blob/0d8dceea4310fde5706b3ce1c70609d72a38efdf/mp/src/game/server/util.cpp#L1330

That sounds a little stupid, honestly. Different projectiles should have different hitboxes that match their size and shape. At the very least the Loose Cannon should get it's model reduced to more closely match the hitbox. Otherwise it throws off people that attempt to aim with it.

[kisak-valve]

Hello, per "Fixed the Iron Bomber's projectile collision size not matching other projectile collision sizes" in the 2022-07-07 Team Fortress 2 update, please retest this issue.

[agrastiOs]

I've retested it, has been fixed. @AzureAzel thoughts?

[kisak-valve]

Thanks for retesting @agrastiOs. Closing as fixed.