added type configuration for differential

koptilnya/engine_remastered/powertrain/differential.txt

@@ -9,6 +9,10 @@ require('/koptilnya/libs/constants.txt')
 
 local Differential = class('Differential', PowertrainComponent)
 
+function Differential.getSplitStrategy(type)
+    return SPLIT_STRATEGIES[type] or SPLIT_STRATEGIES[Differential.TYPES.Open]
+end
+
 function Differential:initialize(vehicle, name, config)
     PowertrainComponent.initialize(self, vehicle, name, config)
 
@@ -24,6 +28,7 @@ function Differential:initialize(vehicle, name, config)
     self.preload = config.Preload or 10
     self.stiffness = config.Stiffness or 0.1
     self.slipTorque = config.SlipTorque or 1000
+    self.splitStrategy = Differential.getSplitStrategy(config.Type or Differential.TYPES.Open)
 end
 
 function Differential:linkComponent(component)
@@ -85,7 +90,7 @@ function Differential:forwardStep(torque, inertia)
 
     self.torque = torque * self.finalDrive
 
-    local tqA, tqB = self:_openDiffTorqueSplit(
+    local tqA, tqB = self:splitStrategy(
             self.torque,
             aW,
             bW,
@@ -156,4 +161,18 @@ function Differential:_HLSDTorqueSplit(tq, aW, bW, aI, bI, biasAB, preload, stif
     return tq * (1 - biasAB) - dTq, tq * biasAB + dTq
 end
 
+Differential.TYPES = {
+    Open = 'Open',
+    Locking = 'Locking',
+    VLSD = 'VLSD',
+    HLSD = 'HLSD',
+}
+
+SPLIT_STRATEGIES = {
+    [Differential.TYPES.Open] = Differential._openDiffTorqueSplit,
+    [Differential.TYPES.Locking] = Differential._lockingDiffTorqueSplit,
+    [Differential.TYPES.VLSD] = Differential._VLSDTorqueSplit,
+    [Differential.TYPES.HLSD] = Differential._HLSDTorqueSplit,
+}
+
 return Differential