feat: loop turns are now a setting

Loop (270 degree) turns on headlands can now be set
on for any vehicle in the CP settings.

When activated, the vehicle will do a 270 turn instead
of the normal headland turn maneuver.

Author: Peter Vaiko

config/VehicleSettingsSetup.xml

@@ -36,6 +36,8 @@
 		<!--Pathfinder Reverse-->
 		<Setting classType="AIParameterBooleanSetting" name="allowReversePathfinding" defaultBool="true" isExpertModeOnly="true" isVisible="areCourseSettingsVisible"/>
 		<Setting classType="AIParameterBooleanSetting" name="allowPathfinderTurns" defaultBool="false" isExpertModeOnly="true" isVisible="areCourseSettingsVisible"/>
+		<!--Loop turns on headland-->
+		<Setting classType="AIParameterBooleanSetting" name="loopTurnsOnHeadland" defaultBool="true" isExpertModeOnly="true" isVisible="areCourseSettingsVisible"/>
 	</SettingSubTitle>
 
 	<SettingSubTitle title="implement">

scripts/ai/turns/AITurn.lua

@@ -743,7 +743,7 @@ function CourseTurn:generateCalculatedTurn()
     local turnManeuver
     if self.turnContext:isHeadlandCorner() then
         self:debug('This is a headland turn')
-        if self.hasChainedAttachments then
+        if self.settings.loopTurnsOnHeadland:getValue() then
             -- do a 270° turn forward only
             turnManeuver = LoopTurnManeuver(self.vehicle, self.turnContext, self.vehicle:getAIDirectionNode(),
                     self.turningRadius, self.workWidth, self.steeringLength)