Is there any way to change a unit's canMove attribute while the game is running?

I can get the value of a unit's canMove through the unitDef, but I can not seem to be able to set it to a new value.

local movement = UnitDefs[unitID]["canMove"]

I am looking for a way to toggle a unit's ability to move on and off. Thanks.

UnitDefs table is read only.

save original speed & turnrate:
local mt = Spring.GetUnitMoveTypeData(unitID)
local originalspeed = mt.maxSpeed
local originalturnrate = mt.turnRate

make immobile:
Spring.MoveCtrl.SetGroundMoveTypeData(unitID, "maxSpeed", 0)
Spring.MoveCtrl.SetGroundMoveTypeData(unitID, "turnRate",0)

make mobile again:
Spring.MoveCtrl.SetGroundMoveTypeData(unitID, "maxSpeed", originalspeed)
Spring.MoveCtrl.SetGroundMoveTypeData(unitID, "turnRate",originalturnrate)

0 = in 0.82.7 this worked.
In 85.0 it gets you the message:
"Warning: Can not assign key "maxSpeed" to GroundMoveType"
(it will work though, so that warning is imo a bug)
Setting to 0.01 is almost the same as 0 and works without warning.

This is exactly what I need. I tried the following just to test it. I can get the movement values, but an error occurs when the set is called. The error states "attempted to index field 'MoveCtrl' (a nil value)"

for id,unitDef in ipairs(Spring.GetSelectedUnits()) do
local mt = Spring.GetUnitMoveTypeData(unitDef)
local originalspeed = mt.maxSpeed
local originalturnrate = mt.turnRate

Spring.Echo("maxSpeed: "..originalspeed)

Spring.MoveCtrl.SetGroundMoveTypeData(unitDef, "maxSpeed", 0.01)
Spring.MoveCtrl.SetGroundMoveTypeData(unitDef, "turnRate",0.01)
end

I tried to use both id and unitDef from the Spring.GetSelectedUnits() and only unitDef worked with the getter.

Thanks for you help.

do you try this in a gadget or unit script?
because elsewhere it will not work.

Here is how to do it with a widget:

Spring.GiveOrderToUnit(unitID, CMD.STOP,{},{})
Spring.GiveOrderToUnit(unitID, CMD.MOVESTATE,{0},{})

That is the best you can do as a widget because they cannot change basic unit attributes.

Is there a way to make a gadget that modifies unit's attributes and then call the function from a widget?

I have been trying to call a function from a gadget using the following include in my widget.

VFS.Include("LuaRules\Gadgets\modifyUnitAttributes.lua",nil)

I have tried a couple variants, but the widget does not load with the include.

Thanks again.

Even if it did work, you would still be in lua "widget space".
You want to have widget -> gadget communication (not sure if it can go both ways). You do that by sending messages, f.e :
--widget code


--gadget code


Now remember when you do stuff in your gadget, it may not be possible to do it in the RecvLuaMsg function (the Gods of Olymp disagree), so you may need to delay the call, f.e:


PS: gadgets may be able to edit unit's attributes, but not sure if they can do so for unitdefs

They can't. If you want that you have to manually loop through all units that you want to edit.

Thank you for your help.

I am getting a "[string "LuaRules/Gadgets/modifyunitattributes.lua"]:107: Unit does not have a compatible MoveType" error in the gadget when I try to call:

Spring.MoveCtrl.SetGroundMoveTypeData(id, "maxSpeed", 0.01)

Is moveType need to be declared in the unit script? or could there be another reason why the unit would not have a compatible MoveType?

Is it an aircraft?

No, it is a ground unit as far as I know. The unit walks along the ground anyway.

what mod and what is the unitname?

no, go fish.

My guess is that it is a mobile unit without a valid movementClass then