Mash tab to cycle camera target between your commander and your first factory. Unbinds useless overview mode.

gui_tab_comm_base.lua

function widget:GetInfo()
	return {
		name      = "Tab Comm Base",
		desc      = "Binds tab to swap between commander and base",
		author    = "Beherith",
		date      = "20220328",
		license   = "GNU GPL, v2 or later",
		layer     = 0,
		enabled   = true
	}
end

local communitID = nil
local commdeathpos = nil

local basepos = nil
local speed = 0.25

local armcomUnitDefID = UnitDefNames.armcom.id
local corcomUnitDefID = UnitDefNames.corcom.id

local spec, fullview = Spring.GetSpectatingState()
local myTeamID = Spring.GetMyTeamID()

if spec then return end 

local function dist3d(a,b)
	return math.sqrt( (a[1]-b[1])*(a[1]-b[1]) + (a[2]-b[2])*(a[2]-b[2]) + (a[3]-b[3])*(a[3]-b[3]) )
end

local function tab_comm_base()
	local camX, camY, camZ = Spring.GetCameraPosition()
	local campos = {camX, camY, camZ}
	
	local distancetocomm = nil
	local distancetobase = nil
	
	if communitID then
		local dx, dy, dz = Spring.GetUnitPosition(communitID) 
		distancetocomm = dist3d(campos, {dx,dy,dz})
	elseif commdeathpos then 
		distancetocomm = dist3d(campos, commdeathpos)
	end
	
	if basepos then 
		distancetobase = dist3d(campos, basepos) 
	end
	
	if (distancetocomm and distancetobase and (distancetocomm > distancetobase)) 
	or (distancetocomm and (distancetobase == nil)) then 
		if communitID then
			local dx, dy, dz = Spring.GetUnitPosition(communitID) 
			Spring.SetCameraTarget(dx, dy, dz, speed)
		elseif commdeathpos then 
			Spring.SetCameraTarget(commdeathpos[1], commdeathpos[2], commdeathpos[3], speed)
		end
	elseif distancetobase then 
		Spring.SetCameraTarget(basepos[1], basepos[2], basepos[3], speed)
	end
end

function widget:Initialize()
	Spring.SendCommands({"unbind Any+tab toggleoverview" })
	widgetHandler:AddAction("tab_comm_base", tab_comm_base, nil, 'p')
	Spring.SendCommands({"bind Any+tab tab_comm_base" })
	for _, unitID in pairs(Spring.GetTeamUnits(myTeamID)) do 
		local unitDefID = Spring.GetUnitDefID(unitID)
		if unitDefID and (unitDefID == armcomUnitDefID or unitDefID == corcomUnitDefID) then
			communitID = unitID
		end
	end
end

function widget:Shutdown()
	Spring.SendCommands({"unbind Any+tab tab_comm_base" })
	widgetHandler:RemoveAction("tab_comm_base")
	Spring.SendCommands({"bind Any+tab toggleoverview" })
end

function widget:UnitDestroyed(unitID)
	if unitID == communitID then 
		local dx, dy, dz = Spring.GetUnitPosition(unitID)
		communitID = nil 
		commdeathpos = {dx, dy, dz}
	end 
end

function widget:UnitCreated(unitID, unitDefID, unitTeam, builderID)
	if communitID == nil then 
		if unitTeam == myTeamID and (unitDefID == armcomUnitDefID or unitDefID == corcomUnitDefID) then 
			communitID = unitID
			commdeathpos = nil
		end 
	end
	
	if basepos == nil then 
		if UnitDefs[unitDefID].isFactory then 
			local dx, dy, dz = Spring.GetUnitPosition(unitID)
			basepos = {dx, dy, dz}
		end
	end
end