Allow getting/setting draw position from script

src/controllers/script_controllers/host_bridge.nim

@@ -274,7 +274,7 @@ proc `color=`(self: Unit, color: Colors) =
 
 proc show(self: Unit): bool =
   Visible in assert_present(self).global_flags
-  
+
 proc `show=`(self: Unit, value: bool) =
   assert_present(self)
   if value:
@@ -401,6 +401,16 @@ proc `drawing=`(self: Build, drawing: bool) =
 proc initial_position(self: Build): Vector3 =
   self.initial_position
 
+proc draw_position(self: Build): Vector3 =
+  self.position + self.draw_transform.origin
+
+proc draw_position_set(self: Build, position: Vector3) =
+  if Global in self.global_flags:
+    self.draw_transform_value.origin = position - self.position
+  else:
+    self.draw_transform_value.origin =
+      (position - self.position).local_to(self.parent)
+
 proc save(self: Build, name: string) =
   self.save_points[name] =
       (self.draw_transform, self.color_value.value, self.drawing)
@@ -532,7 +542,8 @@ proc bridge_to_vm*(worker: Worker) =
     play, all_bots
 
   result.bridged_from_vm "builds",
-    drawing, `drawing=`, initial_position, save, restore, all_builds
+    drawing, `drawing=`, initial_position, save, restore, all_builds,
+    draw_position, draw_position_set
 
   result.bridged_from_vm "signs",
     message, `message=`, more, `more=`, height, `height=`, width, `width=`,

vmlib/enu/builds.nim

@@ -8,6 +8,11 @@ bridged_to_host:
   proc all_builds(): seq[Build]
   proc save*(self: Build, name = "default")
   proc restore*(self: Build, name = "default")
+  proc draw_position*(self: Build): Vector3
+  proc `draw_position=`*(self: Build, value: Vector3)
+
+proc `draw_position=`*(self: Build, unit: Unit) =
+  self.draw_position = unit.position
 
 proc all*(_: type Build): seq[Build] = all_builds()
 

vmlib/enu/class_macros.nim

@@ -3,8 +3,8 @@ import types
 import base_api, macro_helpers
 
 const me_props = ["seed", "global", "lock"]
-const target_props = ["position", "start_position", "speed", "scale", "glow",
-                      "global", "seed", "color", "height", "show", "sign"]
+const target_props = ["position", "start_position", "draw_position", "speed",
+  "scale", "glow", "global", "seed", "color", "height", "show", "sign"]
 
 proc params_to_assignments(nodes: seq[NimNode]): NimNode =
   result = new_stmt_list()