UPDATE

koptilnya/engine_remastered/powertrain/gearboxes/base.txt

@@ -0,0 +1,66 @@
+--@include ../powertrain_component.txt
+
+local PowertrainComponent = require('../powertrain_component.txt')
+
+local Gearbox = class('Gearbox', PowertrainComponent)
+
+function Gearbox:initialize(vehicle, name, config)
+    PowertrainComponent.initialize(self, vehicle, name, config)
+
+    self.wireInputs = {
+        Upshift = 'number',
+        Downshift = 'number'
+    }
+    self.wireOutputs = {
+        Gearbox_RPM = 'number',
+        Gearbox_Torque = 'number',
+        Gearbox_Ratio = 'number'
+    }
+
+    self.type = config.Type or 'MANUAL'
+    self.inertia = config.Inertia or 1000
+
+    self.ratio = 0
+end
+
+function Gearbox:updateWireOutputs()
+    wire.ports.Gearbox_RPM = self:getRPM()
+    wire.ports.Gearbox_Torque = self.torque
+    wire.ports.Gearbox_Ratio = self.ratio
+end
+
+function Gearbox:queryInertia()
+    if self.output == nil or self.ratio == 0 then
+        return self.inertia
+    end
+
+    return self.inertia + self.output:queryInertia() / math.pow(self.ratio, 2)
+end
+
+function Gearbox:queryAngularVelocity(angularVelocity)
+    self.angularVelocity = angularVelocity
+
+    if self.output == nil or self.ratio == 0 then
+        return angularVelocity
+    end
+
+    return self.output:queryAngularVelocity(angularVelocity) * self.ratio
+end
+
+function Gearbox:forwardStep(torque, inertia)
+    if self.output == nil then
+        return torque
+    end
+
+    if self.ratio == 0 then
+        self.output:forwardStep(0, self.inertia)
+
+        return torque
+    end
+
+    self.torque = torque * self.ratio
+
+    return self.output:forwardStep(self.torque, (inertia + self.inertia) * math.pow(self.ratio, 2)) / self.ratio
+end
+
+return Gearbox