Add occlusion culling for buildings (#30)

Also includes the cleanup of many building meshes that would crash the editor during occluder mesh generation.

native/Cargo.toml

@@ -18,5 +18,7 @@ derive-debug = "0.1.2"
 thiserror = "1.0.56"
 anyhow = { version = "1.0.79" }
 rand = "0.8.5"
+pomsky-macro = "0.11.0"
+regex = "1.10.5"
 
 godot-rust-script = { git = "https://github.com/titannano/godot-rust-script", rev = "7549d6fc208c545d3f06f02a68a7ce163073ce5d" }

native/src/editor.rs

@@ -0,0 +1,44 @@
+mod building_imports;
+
+use godot::{
+    builtin::Callable,
+    engine::{notify::NodeNotification, EditorPlugin, IEditorPlugin},
+    obj::{Base, Gd, WithBaseField},
+    register::{godot_api, GodotClass},
+};
+
+use crate::util::logger;
+use building_imports::SetupBuildingImports;
+
+#[derive(GodotClass)]
+#[class(editor_plugin, tool, base=EditorPlugin)]
+struct EditorExtension {
+    setup_building_imports: Gd<SetupBuildingImports>,
+    base: Base<EditorPlugin>,
+}
+
+#[godot_api]
+impl IEditorPlugin for EditorExtension {
+    fn init(base: Base<EditorPlugin>) -> Self {
+        Self {
+            setup_building_imports: SetupBuildingImports::new(base.to_gd().get_editor_interface()),
+            base,
+        }
+    }
+
+    fn enter_tree(&mut self) {
+        let building_imports = self.setup_building_imports.clone();
+
+        self.base_mut().add_tool_menu_item(
+            "Setup Building Imports...".into(),
+            Callable::from_object_method(&building_imports, "start"),
+        );
+    }
+
+    fn on_notification(&mut self, what: NodeNotification) {
+        if what == NodeNotification::PREDELETE {
+            logger::debug!("godots destructor was called for EditorExtension...");
+            self.setup_building_imports.clone().free();
+        }
+    }
+}