Ensure all units get marked as dirty on init

Author: dsrw

src/models/ground.nim

@@ -19,12 +19,9 @@ proc fire(self: Ground, append = false) {.gcsafe.} =
       )
 
       state.units += add_to
-      add_to.global_flags += Dirty
   elif state.tool == PlaceBot and state.bot_at(self.target_point).is_nil:
     var t = Transform.init(origin = self.target_point)
-    var bot = Bot.init(transform = t)
-    state.units += bot
-    bot.global_flags += Dirty
+    state.units += Bot.init(transform = t)
 
 proc init*(_: type Ground, node: Spatial): Ground =
   let self = Ground(

src/models/units.nim

@@ -42,6 +42,7 @@ proc init_unit*[T: Unit](self: T, shared = true) =
 
   self.init_shared
   self.global_flags += Visible
+  self.global_flags += Dirty
 
 proc position*(self: Unit): Vector3 =
   if Global in self.global_flags: