Exempting certain ents or classes from duplication?

[Bubbus]

Hi, I've got a missile-pod entity with a series of missile entities parented to it. The pod spawns these missiles inside itself, parents them to itself and stores them in a table so it can launch them - this is all working great but the missiles should not be able to survive duplication as they should only be created via the pod. Is there any way to mark these missiles as unduplicable? I've checked the duplicator library and found that there's a duplicator.Allow function (and duplicator.IsAllowed("missile") == true), but I haven't found any counterparts to this. Any solution will do as long as it covers the three main duplicators (vanilla, Adv. duplicator 1 + 2) - thanks for any tips.

[Rubat]

[url]http://wiki.garrysmod.com/page/ENTITY/PreEntityCopy[/url] ?

[editline]15th December 2014[/editline]

[url]http://wiki.garrysmod.com/page/ENTITY/PostEntityPaste[/url] ??

[Bubbus]

Thanks, I can definitely use PostEntityPaste to detect/delete the missiles once pasted, and alter/respawn them according to the rules. Not sure if it's feasible to use PreEntityCopy to block the duplication? Stopping the missiles from entering the dupe altogether would be ideal but the other approach will do too.

[Kogitsune]

function duplicator.Deny( class )
  local _, x

  x = debug.getupvalue( duplicator.Allow, 1 )

  x[ class ] = false
end

Haven't tested it in-game, but in theory it should work since this does:

Q = { }

do

	local x = { }

	function Q.Allow( f )
		x[ f ] = true
	end
	
	function Q.IsAllowed( v )
		return x[ v ]
	end
end

print( tostring( x ) )

print( tostring( Q.IsAllowed( "happy" ) ) )
Q.Allow( "happy" )
print( Q.IsAllowed( "happy" ) )

print( debug.getupvalue( Q.Allow, 1 ) )

_, x = debug.getupvalue( Q.Allow, 1 )

x[ "happy" ] = false

print( Q.IsAllowed( "happy" ) )

nil
nil
true
x	table
false

[Bubbus]

Learning something new every day, that's clever. I feel odd to rely on DuplicateAllowed to be upvalue #1, so even though it'll probably never change I decided to check the upvalue name:

[lua]function duplicator.Deny( class )
local name, val
local i = 1

while true do
name, val = debug.getupvalue( duplicator.Allow, i )
if name == "DuplicateAllowed" then break end
if not name then error( "duplicator.Deny could not locate the DuplicateAllowed table!" ) end
i = i + 1
end

val[ class ] = false
end[/lua]

While this works, it looks like only Garry's duplicator respects duplicator.IsAllowed, and Adv duplicator 1 and 2 spawn the missile regardless. Garry's duplicator also supports Entity.DoNotDuplicate but AD1+2 also seem to ignore this.

The final function ended up looking like this:
[lua]function duplicator.Deny( class )
local name, val
local i = 1

while true do
name, val = debug.getupvalue( duplicator.Allow, i )
if name == "DuplicateAllowed" then break end
if not name then error( "duplicator.Deny could not locate the DuplicateAllowed table!" ) end
i = i + 1
end

val[ class ] = false

if AdvDupe2 then
AdvDupe2.duplicator.WhiteList[class] = nil
end

if AdvDupe then
AdvDupe.AdminSettings.ChangeDisallowedClass( class, true, true )
end

end[/lua]

I'll hold onto this code for now, submit this to AD1+2 as a request and hopefully see support for the vanilla options in future.