vehicle drives the way it is facing

api.lua

@@ -229,6 +229,8 @@ function vehicles.object_drive(entity, dtime, def)
 		else
 		entity.object:setyaw(target_yaw)
 		end
+		dir.x = -math.sin(entity_yaw)
+		dir.z = math.cos(entity_yaw)
 	else
 		--minetest.chat_send_all("yaw:"..entity_yaw)
 		--minetest.chat_send_all("dirx: "..dir.x.." dirz:"..dir.z)

init.lua

@@ -1478,7 +1478,7 @@ minetest.register_entity("vehicles:apache", {
 	hp_max = 200,
 	animation_speed = 5,
 	physical = true,
-	collisionbox = {-1.7, 0, -1.7, 1.7, 0.9, 1.7},
+	collisionbox = {-1.8, 0, -1.8, 1.8, 1.5, 1.8},
 	on_rightclick = function(self, clicker)
 		if self.driver and clicker == self.driver then
 		vehicles.object_detach(self, clicker, {x=1, y=0, z=1})