new terrain plugin

addons/terrain_3d/menu/directory_setup.tscn

@@ -0,0 +1,48 @@
+[gd_scene format=3 uid="uid://by3kr2nqbqr67"]
+
+[node name="DirectorySetup" type="ConfirmationDialog"]
+title = "Terrain3D Data Directory Setup"
+position = Vector2i(0, 36)
+size = Vector2i(750, 330)
+visible = true
+
+[node name="Margin" type="MarginContainer" parent="."]
+offset_left = 8.0
+offset_top = 8.0
+offset_right = 742.0
+offset_bottom = 281.0
+theme_override_constants/margin_left = 20
+theme_override_constants/margin_top = 20
+theme_override_constants/margin_right = 20
+theme_override_constants/margin_bottom = 20
+
+[node name="VBox" type="VBoxContainer" parent="Margin"]
+layout_mode = 2
+
+[node name="Instructions" type="Label" parent="Margin/VBox"]
+custom_minimum_size = Vector2(400, 0)
+layout_mode = 2
+text = "Terrain3D now stores data in a directory instead of a single file. Each region is stored in a separate file named `terrain3d[-_]##[-_]##.res`. For instance, the region at location (-1, 1) would be named `terrain3d-01_01.res`. Enable Terrain3D / Debug / Show Region Labels for a visual display."
+autowrap_mode = 3
+
+[node name="DirectoryLabel" type="Label" parent="Margin/VBox"]
+custom_minimum_size = Vector2(400, 0)
+layout_mode = 2
+text = "
+Specify the directory to store your data. Any existing region files will be loaded."
+autowrap_mode = 3
+
+[node name="DirHBox" type="HBoxContainer" parent="Margin/VBox"]
+layout_mode = 2
+
+[node name="LineEdit" type="LineEdit" parent="Margin/VBox/DirHBox"]
+layout_mode = 2
+size_flags_horizontal = 3
+placeholder_text = "Data directory"
+
+[node name="SelectDir" type="Button" parent="Margin/VBox/DirHBox"]
+layout_mode = 2
+
+[node name="Spacer" type="Control" parent="Margin/VBox"]
+custom_minimum_size = Vector2(0, 40)
+layout_mode = 2