Доработка. Направление антенн задаётся движением правой кнопки мыши

scenes/wnd_stc.tscn

@@ -7,6 +7,5 @@ initial_position = 3
 size = Vector2i(1600, 1200)
 mode = 3
 current_screen = 1
-borderless = true
 
 [node name="TabContainer" parent="." instance=ExtResource("1_c76qk")]

scenes/работа.gd

@@ -30,11 +30,11 @@ const RADIO_GROUPE_NAMES = \
 enum DRAG_FSM { IDLE, DRAG }
 var radio_groupe: Array
 var drag_pos_begin: Vector2
-var drag_pos_end: Vector2
 var drag_fsm: DRAG_FSM
 var drag_button: MouseButton
 var pc0: Vector2
 var ant_dir_width_begin: float
+var ant_dir_begin: float
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
@@ -68,14 +68,12 @@ func map_xy_ang(pos0: Vector2, pos: Vector2) -> Vector2:
     return Vector2(ang, radius)
 
 
-func set_ant_width(position: Vector2):
+func get_ant_width(position: Vector2, prev: float) -> float:
     var radp: Vector2 = map_xy_ang(pc0, position)
-    var ant_dir_width: float = ant_dir_width_begin + (drag_pos_begin.y - position.y) / 5.0
-    if ant_dir_width < 5.0:
-        ant_dir_width = 5.0
-    if ant_dir_width > 90.0:
-        ant_dir_width = 90.0
-    $canvas.material.set('shader_parameter/ap_ant_w', ant_dir_width)
+    var ap_ant_w: float = prev + (drag_pos_begin.y - position.y) / 5.0
+    if ap_ant_w < 5.0:  ap_ant_w = 5.0
+    if ap_ant_w > 90.0: ap_ant_w = 90.0
+    return ap_ant_w
 
 
 func set_ant_dir(position: Vector2):
@@ -88,7 +86,8 @@ func _input(event):
     if event is InputEventMouseMotion:
         if drag_fsm == DRAG_FSM.DRAG:
             if drag_button == MOUSE_BUTTON_RIGHT:
-                set_ant_width(event.position)
+                var ap_ant_w: float = get_ant_width(event.position, ant_dir_width_begin)
+                $canvas.material.set('shader_parameter/ap_ant_w', ap_ant_w)
             elif drag_button == MOUSE_BUTTON_LEFT:
                 set_ant_dir(event.position)
     if event is InputEventMouseButton:
@@ -100,6 +99,6 @@ func _input(event):
                 if drag_button == MOUSE_BUTTON_LEFT:
                     set_ant_dir(event.position)
                 elif drag_button == MOUSE_BUTTON_RIGHT:
-                    set_ant_width(event.position)
+                    ant_dir_width_begin = $canvas.material.get('shader_parameter/ap_ant_w')
         else:
             drag_fsm = DRAG_FSM.IDLE