When there's object-to-object collision, you usually want to handle it immediately through a collision hook, or one of the damage hooks if the object is hazardous. This way, if it's something you want to override and do something else, or make sure to run something *before* the game takes action, you can do so.
If you want to handle it at a later moment in time (why?), you can store who's the attacker in the victim object, and then make use of that value in some other hook, like so:
addHook("MobjDamage", function(vct, inf, src)
vct.iGotHit = {by=src, with=inf}
end)
addHook("PlayerThink", function(ply)
local m = ply.mo
if m then
if m.iGotHit then
local by,with = m.iGotHit.by, m.iGotHit.with
m.iGotHit = nil
-- do things with these two?
ultrakill(with)
end
end
end)
Handling object collision with PlayerThink
alone... well, there's no optimal way to handle that!
There's not much functionality that abstracts this, so most things you could do have to be manual.
A way I can think of doing this that wouldn't murder the game's performance would be using
searchBlockmap to look around a subset of objects around the player (instead of ALL of the objects in the map. That's going to kill your CPU lmao), and then checking each to see if it intersects the player.
Sorta like this:
-- TN: i use "pm" for "player mobj", and "fm" for "found mobj"
addHook("PlayerThink", function(ply)
local pm = ply.mo
if pm then
searchBlockmap("objects", function(_, fm)
-- this function will be called ONCE _PER_ OBJECT found within radius.
-- searchBlockmap searches through the blockmap, meaning radius will snap to the nearest 128x128 coords.
-- function *will* be called with objects that *may not* be intersecting.
-- some manual checking is needed
local xCollision = (pm.x + pm.radius > fm.x) and (fm.x + fm.radius >= pm.x)
local yCollision = (pm.y + pm.radius > fm.y) and (fm.y + fm.radius >= pm.y)
local zCollision = (pm.z + pm.height > fm.z) and (fm.z + fm.height >= pm.z)
if xCollision and yCollision and zCollision then
-- colliding!
-- do stuff
ultrakill(fm)
end
end, pm)
end
end)
But even with this, I certainly do not recommend it. There are better ways available that don't involve this much yapping which can be simplified with a single collision hook, as proven above.
