How to reference a <gen> unit variable in JASS?

[Gnuoy]

I found a piece of code that needs to be added to my map but I want it to reference a specific unit in my map, CASTLE 0012 <gen>, and not triggering unit. Can anyone help me with this? Can't find the answer on any guide.

• call IssueImmediateOrderById(GetTriggerUnit(), 851976)

edit: my goal here to is cancel a 2nd trained hero after the first one is trained, if the player queues up two, then it limits heroes. hope that makes sense. the above call command is supposed to issue 'esc' key stroke, cancelling training of the 2nd hero.

 

[A]mun]

You can make it work like this:
Set VariableSet u = CASTLE 0012 <gen>
Custom script: call IssueImmediateOrderById(udg_u, 851976)

u is simply a unit global variable

 

[Gnuoy]

are units already on the map considered variables? do you know a way to reference that already existing variable in the custom script call command in the GUI?

 

[Razorclaw_X]

If you really have to do it that way, make a dummy trigger with an Action that refers to that preplaced unit and then just convert to custom script. It'll show you what it's being called.

 

[HerlySQR]

The thing with JASS is the unit must have be referenced first in a GUI trigger to have its ID, it should like "Paladin 0001", so that 0001 is the ID (you can delete that trigger after, except if you use Lua, in that case the trigger must exist, but you can turn it off because deactiving it doesn't count).
When you have the ID you must look their unit-type ID or destructable or item (you should look it in the editor and press Ctrl+D), then look what type of object this to get the prefix (if is a unit, the prefix is unit; if is an item, item, if is a destructable, dest), then the generated variable should look like this:
"gg_<Object prefix><ID of the type><ID of the object>", example, if is a peasant called "Peasant 0000", is a unit and its ID is 'hpea' so the generated variable would be: gg_unit_hpea_0000

 

[Gnuoy]

thank you @HerlySQR that answers my question exactly. I was just thinking do it that way then I could avoid setting a duplicate variable.

 

[Gnuoy]

Update:
I finally mustered the energy to try n implement this. Maybe I'm not understanding the first part of your post about getting the unit ID. Maybe I should just do it the way with the duplicate GUI variable.

This seems to not work:

• Custom script: call IssueImmediateOrderById (gg_unit_hcas_0012, 851976)

hcas_0012 is a pre-exiting castle unit on the map.

where as this seems to work with the GUI variable.

• Custom script: call IssueImmediateOrderById (udg_King_Castle_Var_Red, 851976)

I'll just do it the GUI way but any additional constructive comments would be welcomed.

 

[HerlySQR]

I think I was wrong in one thing, you need at least one existing GUI trigger or GUI trigger converted to custom script that have referenced that unit in the map, just I though it was just in Lua because in Lua you can't convert a trigger to a custom script.