Backdrop Rotation & Zoom + FlxPoint Reflectable

FlxBackdrop now has .rotation and .zoom allowing you to rotate and zoom
You can now also use the entire FlxPoint api from hscript

Author: NeeEoo

source/funkin/editors/EditorTreeMenu.hx

@@ -7,6 +7,7 @@ import funkin.options.*;
 class EditorTreeMenu extends TreeMenu {
 	public var bg:FlxBackdrop;
 	public var bgType:String = "default";
+	public var bgMovement:FlxPoint = new FlxPoint();
 
 	public override function create() {
 		super.create();
@@ -16,16 +17,16 @@ class EditorTreeMenu extends TreeMenu {
 		bg = new FlxBackdrop();
 		bg.loadGraphic(Paths.image('editors/bgs/${bgType}'));
 		bg.antialiasing = true;
+		setBackgroundRotation(-5);
 		add(bg);
 	}
 
-	public override function exit() {
-		FlxG.switchState(new MainMenuState());
+	public inline function setBackgroundRotation(rotation:Float) {
+		bg.rotation = rotation;
+		bg.velocity.set(85, 0).degrees = bg.rotation;
 	}
 
-	public override function update(elapsed:Float) {
-		super.update(elapsed);
-		bg.x += elapsed * 125;
-		bg.y += elapsed * 125;
+	public override function exit() {
+		FlxG.switchState(new MainMenuState());
 	}
 }