Check for collsion between NPC and player

[AtomiCel]

I was wondering if it is possible to hook a collision StartTouch between an npc(not SNPC) and a player.

[Crazy Quebec]

Totally untested :
[lua]Meta = FindMetaTable("Player")

function Meta:StartTouch(ent)
if ( ent:IsValid() and ent:IsNPC() ) then
-- Do Stuff
end
end[/lua]

[Skyhawk]

[lua]local Meta = FindMetaTable("player")

local OldTouchFuncs = Meta.StartTouch

function Meta:StartTouch(ent)
OldTouchFuncs()
if ( ent:IsValid() and ent:IsNPC() ) then
-- Do Stuff
end
end[/lua]

Slight modification of the above, should prevent overwriting of other functions there.

[StylixX]

The Player metatable doesn't have a "StartTouch" hook like SENTs AFAIK...

[ralle105]

Maybe do some simple box collision detection using the OBB's of both?

[Skyhawk]

[QUOTE=ralle105;16988550]Maybe do some simple box collision detection using the OBB's of both?[/QUOTE]

Actually, since player collision doesn't move off their AABB, it would probably be better to use that. I don't know if they even have a rotating OBB.

[ralle105]

[QUOTE=Skyhawk;16988678]Actually, since player collision doesn't move off their AABB, it would probably be better to use that. I don't know if they even have a rotating OBB.[/QUOTE]

[lua]
function isColliding(ply, NPC)

local plyRad = ply:OBBMaxs().x
local npcRad = NPC:OBBMaxs().x

local plyPos = ply:GetPos()
local npcPos = NPC:GetPos()

local plyZ = plyPos.z

plyPos.z = npcPos.z

if (plyPos:Distance(npcPos) < plyRad+npcRad) then

local plyH = ply:OBBMaxs().z
local npcH = NPC:OBBMaxs().z

if (plyZ > npcPos.z) then

if (npcPos.z+npcH > plyZ) then

return true
end
else

if (plyZ+plyH > npcPos.z) then

return true
end
end
end
end
[/lua]

Uses two "cylinders" to work out if they're colliding. Untested.