[TF2] fix Jarate and Mad Milk splash AoE using a cube rather than a sphere

[wgetJane]

Description

partially fixes ValveSoftware/Source-1-Games/issues/5905

i will note that the consequence of this fix is definitely a noticeable balance change, however the affected weapons generally seem to be deemed to be overpowered by the community anyway

maybe this fix might need to be disabled specifically for mvm? idk what the opinion is for this

video:

simplescreenrecorder-2026-01-27_15.08.48.mp4

[ficool2]

Rather than having to hack this in at every place where UTIL_EntitiesInSphere is called, this should just be done in UTIL_EntitiesInSphere itself

[wgetJane]

i agree but this is supposed to be a bit more of a conservative approach for now since this would affect quite a lot of other things (airblast, dispensers, etc)

[old702]

Maybe, to preserve the interaction volume so it doesn’t feel like a balance change, a coefficient could be applied that keeps the sphere’s volume equivalent to the box’s volume.
Then this could be applied to airblast, dispensers, etc.

Something like:
r(new) = r × 1.24 (so the volume roughly matches the old AABB).

I think that because of the quirks of not rotating boxes, this could also be applied to airblast, which would reduce the blind spots in the cone check logic that occur due to alignment with world axes.