wnsrc/lua/entities/lvs_base/sv_engine.lua

--[[
| This file was obtained through the combined efforts
| of Madbluntz & Plymouth Antiquarian Society.
|
| Credits: lifestorm, Gregory Wayne Rossel JR.,
| 	Maloy, DrPepper10 @ RIP, Atle!
|
| Visit for more: https://plymouth.thetwilightzone.ru/
--]]


function ENT:HandleStart()
	local Driver = self:GetDriver()

	if IsValid( Driver ) then
		local KeyReload = Driver:lvsKeyDown( "ENGINE" )

		if self.OldKeyReload ~= KeyReload then
			self.OldKeyReload = KeyReload

			if KeyReload then
				self:ToggleEngine()
			end
		end
	end
end

function ENT:ToggleEngine()
	if self:GetEngineActive() then
		self:StopEngine()
	else
		self:StartEngine()
	end
end

function ENT:IsEngineStartAllowed()
	if hook.Run( "LVS.IsEngineStartAllowed", self ) == false then return false end

	if self:WaterLevel() > self.WaterLevelPreventStart then return false end

	return true
end

function ENT:OnEngineActiveChanged( Active )
end

function ENT:StartEngine()
	if self:GetEngineActive() or not self:IsEngineStartAllowed() then return end

	self:PhysWake()

	self:SetEngineActive( true )
	self:OnEngineActiveChanged( true )
end

function ENT:StopEngine()
	if not self:GetEngineActive() then return end

	self:SetEngineActive( false )
	self:OnEngineActiveChanged( false )
end