Initial data

addons/pvzadventure/scripts/packed_scene_preview_generator.gd

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+@tool
+extends TextureRect
+
+@onready var subview = $Viewport
+@onready var camera = $Viewport/Camera2D
+var scene : Node
+
+func set_path(path):
+	if scene:
+		scene.queue_free()
+	if ResourceLoader.exists(path) == false:
+		return
+	var packed_scene : PackedScene = load(path)
+	render_scene(path, packed_scene)
+	
+
+func render_scene(path: String,packed : PackedScene):
+	scene = packed.instantiate()
+	subview.add_child(scene)
+	
+	var bb = get_bounding_box(scene)
+	subview.size = Vector2(max(bb.size.x,bb.size.y),max(bb.size.x,bb.size.y))
+
+	camera.position = bb.position * Vector2(0.5,0.5)
+	
+	var vtexture : ViewportTexture = subview.get_texture()
+	texture = vtexture
+	
+
+func get_bounding_box(root: Node2D) -> Rect2:
+	var rect := Rect2();
+	var children := root.get_children();
+	while children:
+		var child = children.pop_back();
+		children.append_array(child.get_children());
+		
+		if child.has_method('get_rect') and child.has_method('to_global'):
+			var child_rect := child.get_rect() as Rect2;
+			child_rect.position = child.to_global(child_rect.position);
+			rect = rect.merge(child_rect);
+			
+	return rect;