Lua Entities and Hammer

[Willsmith190]

Now, I know if you create an entity for Garrysmod you can put it into a map by just adding an entity with its name, and I know how to make FGD files and use them and whatnot. But my real question is communication between them. To explain this I think its best to do an example.

So, I make an entity called "material_barrel" and this barrel has different types that are calculated when it's spawned. It spawns a different kind of barrel depending on what weapon your holding.

Now, I want to make a map that has these barrels, but you can choose what material it will be.
This is what the FGD would be:

[...] = material_barrel:
"Its just an example, people"
[
barrel_types(choices) : "Type" : 0 =
[
0 : "Oil"
2 : "Gas"
3 : "Crack"
]
]

So, I spawn an entity, and pick "Crack" (what did you think I'd pick?). Now, I what I expect to happen is to have the barrel spawn as "Crack" when themap loads. How do I make the Lua script get what is set in the map?

[Fantym420]

you need to use the ENT:KeyValue( key, value) on the entity, this gets called before the initialize and it receives the values from the map. I am working on a trigger_teleport entity and had to use this to get the trigger info. here's the wiki [url]http://wiki.garrysmod.com/?title=ENT.KeyValue[/url]

example:
[lua]

function ENT:KeyValue( key, value )

-- Find out what's being passed
print(tostring(self) .. " with -- Key : " .. key .. " Value : " .. value)

if key == "ScriptName" then
self.ScriptName = value
elseif key == "model" then
self.model = value
elseif key == "targetname" then
self.targetname = value
elseif key == "target" then
self.target = value
elseif key == "StartDisabled" then
self.StartDisabled = value
elseif key == "spawnflags" then
self.spawnflags = value
elseif key == "origin" then
self.origin = value
elseif key == "landmark" then
self.landmark = value
elseif key == "classname" then
self.classname = value
elseif key == "hammerid" then
self.hammerid = value
elseif key == "OnStartTouch" then
self.OnStartTouch = value
elseif key == "OnEndTouch" then
self.OnEndTouch = value
else
print("!!Unknown Key Value!!")
print("Key : " .. key .. " -- Value : " .. value)
end

--[[ Keys and Values for a trigger_teleport

Entity [14][sent_brush] with -- Key : ScriptName Value : trigger_teleport
Entity [14][trigger_teleport] with -- Key : model Value : *2
Entity [14][trigger_teleport] with -- Key : targetname Value : Teleport_Top
Entity [14][trigger_teleport] with -- Key : target Value : TeleDest_Bottom
Entity [14][trigger_teleport] with -- Key : StartDisabled Value : 0
Entity [14][trigger_teleport] with -- Key : spawnflags Value : 15
Entity [14][trigger_teleport] with -- Key : origin Value : 0 0.01 14946.5
Entity [14][trigger_teleport] with -- Key : landmark Value : TeleDest_Top
Entity [14][trigger_teleport] with -- Key : classname Value : trigger_teleport
Entity [14][trigger_teleport] with -- Key : hammerid Value : 4934
Entity [14][trigger_teleport] with -- Key : OnStartTouch Value : Teleport_Bottom,Disable,,0,-1
Entity [14][trigger_teleport] with -- Key : OnEndTouch Value : Teleport_Bottom,Enable,,0.01,-1
--]]
end
[/lua]

[Entoros]

[lua]function ENT:KeyValue( key, value )
self.KeyValues = self.KeyValues or {};
self.KeyValues[key] = value;
end[/lua]

Sorry, it just saddens me to see people doing ridiculous amounts of work which using tables could simplify to a few lines.