Support loading user plugin from .pck

addons/material_maker/engine/nodes/gen_base.gd

@@ -607,6 +607,8 @@ static func remove_comments(s : String) -> String:
 			if comment_end != -1:
 				s = s.erase(comment_begin, comment_end-comment_begin+2)
 				cont = true
+
+
 	s = re_line_comment.sub(s, "", true)
 	return s
 

addons/material_maker/engine/nodes/gen_graph.gd

@@ -6,6 +6,7 @@ var label : String = "Graph"
 var shortdesc = ""
 var longdesc = ""
 var connections = []
+var plugin_data = {}
 
 var editable : bool = false
 
@@ -530,6 +531,7 @@ func _serialize(data: Dictionary) -> Dictionary:
 	data.shortdesc = shortdesc
 	data.longdesc = longdesc
 	data.nodes = []
+	data.plugin_data = plugin_data
 	for c in get_children():
 		data.nodes.append(c.serialize())
 	#data.connections = connections_to_compact(connections)
@@ -543,6 +545,8 @@ func _deserialize(data : Dictionary) -> void:
 		shortdesc = data.shortdesc
 	if data.has("longdesc"):
 		longdesc = data.longdesc
+	if data.has("plugin_data"):
+		plugin_data = data.plugin_data
 	var nodes = data.nodes if data.has("nodes") else []
 	var connection_array : Array = []
 	if data.has("connections"):

addons/material_maker/engine/plugin/plugin_context.gd

@@ -0,0 +1,29 @@
+class PluginContext:
+
+	var plugin_path: String
+	func _init(file_path: String) -> void:
+		plugin_path = file_path
+
+	func load_resource(resource_path: String) -> Variant: 
+
+		if ResourceLoader.exists(resource_path):
+			print("Dependency already exists, either its been loaded or there is a dependency collision")
+			return ResourceLoader.load(resource_path)
+
+		var res_path = resource_path.get_slice("::", 2)
+		var file_path = res_path.replace("res://", plugin_path + "/")
+
+		var dependencies = ResourceLoader.get_dependencies(file_path)
+		for dependency in dependencies:
+			load_resource(dependency)
+
+		print("Loading dependency: " + file_path)
+		var resource = ResourceLoader.load(file_path)
+		if resource == null:
+			return null
+
+		print(resource)
+		resource.take_over_path(resource_path)
+		resource.take_over_path(resource_path.get_slice("::", 0))
+		resource.take_over_path(resource_path.get_slice("::", 2))
+		return resource

addons/material_maker/engine/plugin/plugin_context.gd.uid

@@ -0,0 +1 @@
+uid://demftccswppj6

addons/material_maker/engine/plugin/plugin_instance.gd

@@ -0,0 +1,13 @@
+extends Node
+
+const PluginContext = preload("res://addons/material_maker/engine/plugin/plugin_context.gd")
+
+var context: PluginContext.PluginContext = null
+
+signal on_ui_loaded
+
+func load(resource_path):
+	return context.load_resource(resource_path)
+
+func ui_ready():
+	on_ui_loaded.emit()

addons/material_maker/engine/plugin/plugin_instance.gd.uid

@@ -0,0 +1 @@
+uid://tjn43ecqeoar

addons/material_maker/engine/plugin/plugin_instance.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3 uid="uid://bct66q7hliai2"]
+
+[ext_resource type="Script" path="res://addons/material_maker/engine/plugin/plugin_instance.gd" id="1_51jwo"]
+
+[node name="plugin_instance" type="Node"]
+script = ExtResource("1_51jwo")

addons/material_maker/engine/plugin/plugin_loader.gd

@@ -0,0 +1,55 @@
+extends Node
+
+const PluginContext = preload("res://addons/material_maker/engine/plugin/plugin_context.gd")
+const instance = preload("res://addons/material_maker/engine/plugin/plugin_instance.tscn")
+@onready var mm_plugins = get_node("/root/mm_plugins")
+
+func _ready()-> void:
+	load_plugins()
+
+func load_plugins():
+	var plugin_dir = DirAccess.open("user://plugins")
+	if not plugin_dir:
+		return
+
+	var any_plugins_loaded = false
+
+	var directories = plugin_dir.get_directories()
+	print(directories)
+
+	for directory in directories:
+
+		print(directory)
+		var plugin_folder = "user://plugins/" + directory
+		var plugin_content = DirAccess.open(plugin_folder)
+		var plugin_directories = plugin_content.get_directories()
+		print(plugin_directories)
+
+		var plugin_id = plugin_directories[0]
+		var scene_path = "user://plugins/" + directory + "/" + plugin_id + "/plugin.tscn"
+		print(scene_path)
+
+		var real_path = "user://plugins/" + directory
+
+		var context = PluginContext.PluginContext.new(real_path)
+
+		var dependencies = ResourceLoader.get_dependencies(scene_path)
+		for dependency in dependencies:
+			context.load_resource(dependency)
+
+		var scene = ResourceLoader.load(scene_path)
+		if scene == null:
+			continue
+
+		if not scene is PackedScene:
+			continue
+
+		var plugin_node = scene.instantiate()
+		var addon_instance = instance.instantiate()
+
+		addon_instance.name = plugin_id
+		addon_instance.context = context
+
+		mm_plugins.add_child(addon_instance)
+		addon_instance.add_child(plugin_node)
+		print("Finished loading plugin: " + plugin_id)

addons/material_maker/engine/plugin/plugin_loader.gd.uid

@@ -0,0 +1 @@
+uid://dstdde4y0gqmm

material_maker/main_window.gd

@@ -228,6 +228,9 @@ func _ready() -> void:
 		await get_tree().process_frame
 		new_material()
 
+	update_menus()
+
+	plugin_ui_loaded.call_deferred()
 	size = get_window().size
 	position = Vector2.ZERO
 	set_anchors_preset(Control.PRESET_FULL_RECT)
@@ -246,6 +249,11 @@ func update_menus() -> void:
 		menu_update_requested = true
 		do_update_menus.call_deferred()
 
+func plugin_ui_loaded():
+	var children = mm_plugins.get_children()
+	for child in children:
+		child.ui_ready()
+
 func do_update_menus() -> void:
 	# Create menus
 	var menu_bar_class

material_maker/main_window.tscn

@@ -143,7 +143,6 @@ layout_mode = 2
 
 [node name="Menu" type="HBoxContainer" parent="VBoxContainer/TopBar"]
 layout_mode = 2
-size_flags_horizontal = 3
 
 [node name="Layout" type="HBoxContainer" parent="VBoxContainer"]
 layout_mode = 2

material_maker/tools/library_manager/library_manager.gd

@@ -130,7 +130,12 @@ func get_items(filter : String, sorted := false) -> Array:
 func save_library_list() -> void:
 	var library_list = []
 	for i in range(2, get_child_count()):
-		library_list.push_back(get_child(i).library_path)
+		var path = get_child(i).library_path
+
+		# Libraries loaded via a plugin might not have a file path, so we dont need to save it
+		if path != "":
+			library_list.push_back(get_child(i).library_path)
+
 	mm_globals.config.set_value(config_section, "libraries", library_list)
 
 func has_library(path : String) -> bool:

material_maker/windows/export_animation/export_animation.gd

@@ -96,6 +96,9 @@ func _on_Export_pressed():
 	dialog.add_filter("*.png;PNG image files")
 	add_child(dialog)
 	var files = await dialog.select_files()
+	do_export(files)
+
+func do_export(files):
 	if files.size() > 0:
 		var filename : String = files[0]
 		var size : int = 1 << value_size.size_value

project.godot

@@ -40,6 +40,7 @@ mm_deps="*res://addons/material_maker/engine/dependencies.gd"
 mm_renderer="*res://addons/material_maker/engine/multi_renderer.gd"
 mm_sdf_builder="*res://addons/material_maker/sdf_builder/sdf_builder.tscn"
 mm_preprocessor="*res://addons/material_maker/engine/preprocessor.gd"
+mm_plugins="*res://addons/material_maker/engine/plugin/plugin_loader.gd"
 Html5="*res://material_maker/html5.gd"
 
 [debug]