Initial left hand driving implementation

profiles/car.lua

@@ -138,13 +138,14 @@ properties.u_turn_penalty                  = 20
 properties.traffic_signal_penalty          = 2
 properties.use_turn_restrictions           = true
 properties.continue_straight_at_waypoint   = true
+properties.left_hand_driving               = false
 
 local side_road_speed_multiplier = 0.8
 
 local turn_penalty               = 10
 -- Note: this biases right-side driving.  Should be
 -- inverted for left-driving countries.
-local turn_bias                  = 1.2
+local turn_bias                  = properties.left_hand_driving and 1/1.2 or 1.2
 
 local obey_oneway                = true
 local ignore_areas               = true

profiles/lhs.lua

@@ -0,0 +1,19 @@
+-- Testbot, with turn penalty
+-- Used for testing turn penalties
+
+require 'testbot'
+
+properties.left_hand_driving = true
+
+local turn_penalty           = 500
+local turn_bias              = properties.left_hand_driving and 1/1.2 or 1.2
+
+function turn_function (angle)
+  ---- compute turn penalty as angle^2, with a left/right bias
+  k = turn_penalty/(90.0*90.0)
+  if angle>=0 then
+    return angle*angle*k/turn_bias
+  else
+    return angle*angle*k*turn_bias
+  end
+end

profiles/rhs.lua

@@ -0,0 +1,19 @@
+-- Testbot, with turn penalty
+-- Used for testing turn penalties
+
+require 'testbot'
+
+properties.left_hand_driving = false
+
+local turn_penalty           = 500
+local turn_bias              = properties.left_hand_driving and 1/1.2 or 1.2
+
+function turn_function (angle)
+  ---- compute turn penalty as angle^2, with a left/right bias
+  k = turn_penalty/(90.0*90.0)
+  if angle>=0 then
+    return angle*angle*k/turn_bias
+  else
+    return angle*angle*k*turn_bias
+  end
+end