UPDATE

koptilnya/engine_remastered/powertrain/gearboxes/manual.txt

@@ -0,0 +1,73 @@
+--@include /koptilnya/libs/watcher.txt
+--@include ./base.txt
+
+local BaseGearbox = require('./base.txt')
+
+require('/koptilnya/libs/watcher.txt')
+
+local ManualGearbox = class('ManualGearbox', BaseGearbox)
+
+function ManualGearbox:initialize(vehicle, name, config)
+    BaseGearbox.initialize(self, vehicle, name, config)
+
+    table.merge(self.wireOutputs, {
+        Gearbox_Gear = 'number'
+    })
+
+    self.ratios = config.Ratios or { 3.6, 2.2, 1.5, 1.2, 1.0, 0.8}
+    self.reverse = config.Reverse or 3.4
+
+    self.gear = 0
+
+    function shiftFunc()
+        local upshift = wire.ports.Upshift or 0
+        local downshift = wire.ports.Downshift or 0
+
+        return upshift - downshift
+    end
+
+    self.shiftWatcher = watcher(shiftFunc, function(val)
+        if val ~= 0 then
+            self:shift(val)
+        end
+    end)
+
+    self:recalcRatio()
+end
+
+function ManualGearbox:updateWireOutputs()
+    BaseGearbox.updateWireOutputs(self)
+
+    wire.ports.Gearbox_Gear = self.gear
+end
+
+function ManualGearbox:setGear(gear)
+    if gear >= -1 and gear <= #self.ratios then
+        self.gear = gear
+        self:recalcRatio()
+    end
+end
+
+function ManualGearbox:recalcRatio()
+    if self.gear == -1 then
+        self.ratio = -self.reverse
+    elseif self.gear == 0 then
+        self.ratio = 0
+    else
+        self.ratio = self.ratios[self.gear]
+    end
+end
+
+function ManualGearbox:shift(dir)
+    self:setGear(self.gear + dir)
+end
+
+function ManualGearbox:forwardStep(torque, inertia)
+    local result = BaseGearbox.forwardStep(self, torque, inertia)
+
+    self.shiftWatcher()
+
+    return result
+end
+
+return ManualGearbox