Initialize class/struct variables with default values in platform/ and editor/

55 files changed, 290 insertions, 382 deletions

diff --git a/editor/animation_bezier_editor.h b/editor/animation_bezier_editor.h
index 217393a3b3..1b7ed8f06c 100644
--- a/editor/animation_bezier_editor.h
+++ b/editor/animation_bezier_editor.h
@@ -111,10 +111,10 @@ class AnimationBezierTrackEdit : public Control {
 	Vector2 menu_insert_key;
 
 	struct AnimMoveRestore {
-		int track;
-		float time;
+		int track = 0;
+		float time = 0;
 		Variant key;
-		float transition;
+		float transition = 0;
 	};
 
 	AnimationTrackEditor *editor;
diff --git a/editor/animation_track_editor.cpp b/editor/animation_track_editor.cpp
index b1ffb1dc52..717e4628ae 100644
--- a/editor/animation_track_editor.cpp
+++ b/editor/animation_track_editor.cpp
@@ -44,7 +44,7 @@ class AnimationTrackKeyEdit : public Object {
 	GDCLASS(AnimationTrackKeyEdit, Object);
 
 public:
-	bool setting;
+	bool setting = false;
 
 	bool _hide_script_from_inspector() {
 		return true;
@@ -622,15 +622,15 @@ public:
 		}
 	}
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 	Ref<Animation> animation;
-	int track;
-	float key_ofs;
-	Node *root_path;
+	int track = -1;
+	float key_ofs = 0;
+	Node *root_path = nullptr;
 
 	PropertyInfo hint;
 	NodePath base;
-	bool use_fps;
+	bool use_fps = false;
 
 	void notify_change() {
 		_change_notify();
@@ -644,21 +644,13 @@ public:
 		use_fps = p_enable;
 		_change_notify();
 	}
-
-	AnimationTrackKeyEdit() {
-		use_fps = false;
-		key_ofs = 0;
-		track = -1;
-		setting = false;
-		root_path = nullptr;
-	}
 };
 
 class AnimationMultiTrackKeyEdit : public Object {
 	GDCLASS(AnimationMultiTrackKeyEdit, Object);
 
 public:
-	bool setting;
+	bool setting = false;
 
 	bool _hide_script_from_inspector() {
 		return true;
@@ -1276,11 +1268,11 @@ public:
 	Map<int, NodePath> base_map;
 	PropertyInfo hint;
 
-	Node *root_path;
+	Node *root_path = nullptr;
 
-	bool use_fps;
+	bool use_fps = false;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	void notify_change() {
 		_change_notify();
@@ -1294,12 +1286,6 @@ public:
 		use_fps = p_enable;
 		_change_notify();
 	}
-
-	AnimationMultiTrackKeyEdit() {
-		use_fps = false;
-		setting = false;
-		root_path = nullptr;
-	}
 };
 
 void AnimationTimelineEdit::_zoom_changed(double) {
@@ -4669,10 +4655,10 @@ void AnimationTrackEditor::_move_selection(float p_offset) {
 }
 
 struct _AnimMoveRestore {
-	int track;
-	float time;
+	int track = 0;
+	float time = 0;
 	Variant key;
-	float transition;
+	float transition = 0;
 };
 //used for undo/redo
 
diff --git a/editor/animation_track_editor.h b/editor/animation_track_editor.h
index a31ca892ef..5e12791e34 100644
--- a/editor/animation_track_editor.h
+++ b/editor/animation_track_editor.h
@@ -253,8 +253,8 @@ class AnimationTrackEditGroup : public Control {
 	Ref<Texture2D> icon;
 	String node_name;
 	NodePath node;
-	Node *root;
-	AnimationTimelineEdit *timeline;
+	Node *root = nullptr;
+	AnimationTimelineEdit *timeline = nullptr;
 
 	void _zoom_changed();
 
@@ -354,10 +354,10 @@ class AnimationTrackEditor : public VBoxContainer {
 	struct InsertData {
 		Animation::TrackType type;
 		NodePath path;
-		int track_idx;
+		int track_idx = 0;
 		Variant value;
 		String query;
-		bool advance;
+		bool advance = false;
 	}; /* insert_data;*/
 
 	Label *insert_confirm_text;
@@ -392,13 +392,13 @@ class AnimationTrackEditor : public VBoxContainer {
 	//selection
 
 	struct SelectedKey {
-		int track;
-		int key;
+		int track = 0;
+		int key = 0;
 		bool operator<(const SelectedKey &p_key) const { return track == p_key.track ? key < p_key.key : track < p_key.track; };
 	};
 
 	struct KeyInfo {
-		float pos;
+		float pos = 0;
 	};
 
 	Map<SelectedKey, KeyInfo> selection;
@@ -467,15 +467,15 @@ class AnimationTrackEditor : public VBoxContainer {
 	struct TrackClipboard {
 		NodePath full_path;
 		NodePath base_path;
-		Animation::TrackType track_type;
-		Animation::InterpolationType interp_type;
-		Animation::UpdateMode update_mode;
-		bool loop_wrap;
-		bool enabled;
+		Animation::TrackType track_type = Animation::TrackType::TYPE_ANIMATION;
+		Animation::InterpolationType interp_type = Animation::InterpolationType::INTERPOLATION_CUBIC;
+		Animation::UpdateMode update_mode = Animation::UpdateMode::UPDATE_CAPTURE;
+		bool loop_wrap = false;
+		bool enabled = false;
 
 		struct Key {
-			float time;
-			float transition;
+			float time = 0;
+			float transition = 0;
 			Variant value;
 		};
 		Vector<Key> keys;
diff --git a/editor/audio_stream_preview.h b/editor/audio_stream_preview.h
index 97a582836c..300f1dc5ca 100644
--- a/editor/audio_stream_preview.h
+++ b/editor/audio_stream_preview.h
@@ -60,9 +60,9 @@ class AudioStreamPreviewGenerator : public Node {
 		Ref<AudioStreamPreview> preview;
 		Ref<AudioStream> base_stream;
 		Ref<AudioStreamPlayback> playback;
-		volatile bool generating;
+		volatile bool generating = false;
 		ObjectID id;
-		Thread *thread;
+		Thread *thread = nullptr;
 	};
 
 	Map<ObjectID, Preview> previews;
diff --git a/editor/code_editor.cpp b/editor/code_editor.cpp
index 823fd7e852..7913f09a07 100644
--- a/editor/code_editor.cpp
+++ b/editor/code_editor.cpp
@@ -81,6 +81,8 @@ GotoLineDialog::GotoLineDialog() {
 	register_text_enter(line);
 	text_editor = nullptr;
 
+	line_label = nullptr;
+
 	set_hide_on_ok(false);
 }
 
diff --git a/editor/debugger/editor_profiler.h b/editor/debugger/editor_profiler.h
index aa2ef58db4..637f732b0b 100644
--- a/editor/debugger/editor_profiler.h
+++ b/editor/debugger/editor_profiler.h
@@ -45,27 +45,27 @@ class EditorProfiler : public VBoxContainer {
 
 public:
 	struct Metric {
-		bool valid;
+		bool valid = false;
 
-		int frame_number;
-		float frame_time;
-		float idle_time;
-		float physics_time;
-		float physics_frame_time;
+		int frame_number = 0;
+		float frame_time = 0;
+		float idle_time = 0;
+		float physics_time = 0;
+		float physics_frame_time = 0;
 
 		struct Category {
 			StringName signature;
 			String name;
-			float total_time; //total for category
+			float total_time = 0; //total for category
 
 			struct Item {
 				StringName signature;
 				String name;
 				String script;
-				int line;
-				float self;
-				float total;
-				int calls;
+				int line = 0;
+				float self = 0;
+				float total = 0;
+				int calls = 0;
 			};
 
 			Vector<Item> items;
@@ -75,11 +75,6 @@ public:
 
 		Map<StringName, Category *> category_ptrs;
 		Map<StringName, Category::Item *> item_ptrs;
-
-		Metric() {
-			valid = false;
-			frame_number = 0;
-		}
 	};
 
 	enum DisplayMode {
diff --git a/editor/debugger/editor_visual_profiler.h b/editor/debugger/editor_visual_profiler.h
index 3c1a55dc38..49a2d5c53a 100644
--- a/editor/debugger/editor_visual_profiler.h
+++ b/editor/debugger/editor_visual_profiler.h
@@ -46,9 +46,9 @@ class EditorVisualProfiler : public VBoxContainer {
 
 public:
 	struct Metric {
-		bool valid;
+		bool valid = false;
 
-		uint64_t frame_number;
+		uint64_t frame_number = 0;
 
 		struct Area {
 			String name;
@@ -59,10 +59,6 @@ public:
 		};
 
 		Vector<Area> areas;
-
-		Metric() {
-			valid = false;
-		}
 	};
 
 	enum DisplayTimeMode {
diff --git a/editor/dependency_editor.cpp b/editor/dependency_editor.cpp
index 527286583e..1a7a30ba4e 100644
--- a/editor/dependency_editor.cpp
+++ b/editor/dependency_editor.cpp
@@ -626,6 +626,8 @@ DependencyErrorDialog::DependencyErrorDialog() {
 	vb->add_child(text);
 	text->set_text(TTR("Which action should be taken?"));
 
+	mode = Mode::MODE_RESOURCE;
+
 	fdep = add_button(TTR("Fix Dependencies"), true, "fixdeps");
 
 	set_title(TTR("Errors loading!"));
diff --git a/editor/editor_atlas_packer.h b/editor/editor_atlas_packer.h
index 52ac9524ae..4a9c3a776b 100644
--- a/editor/editor_atlas_packer.h
+++ b/editor/editor_atlas_packer.h
@@ -41,23 +41,23 @@ public:
 	struct Chart {
 		Vector<Vector2> vertices;
 		struct Face {
-			int vertex[3];
+			int vertex[3] = { 0 };
 		};
 		Vector<Face> faces;
-		bool can_transpose;
+		bool can_transpose = false;
 
 		Vector2 final_offset;
-		bool transposed;
+		bool transposed = false;
 	};
 
 private:
 	struct PlottedBitmap {
-		int chart_index;
+		int chart_index = 0;
 		Vector2i offset;
-		int area;
+		int area = 0;
 		Vector<int> top_heights;
 		Vector<int> bottom_heights;
-		bool transposed;
+		bool transposed = false;
 
 		Vector2 final_pos;
 
diff --git a/editor/editor_audio_buses.h b/editor/editor_audio_buses.h
index 01221ad6ef..f72541100d 100644
--- a/editor/editor_audio_buses.h
+++ b/editor/editor_audio_buses.h
@@ -61,13 +61,13 @@ class EditorAudioBus : public PanelContainer {
 	static const int CHANNELS_MAX = 4;
 
 	struct {
-		bool prev_active;
+		bool prev_active = false;
 
-		float peak_l;
-		float peak_r;
+		float peak_l = 0;
+		float peak_r = 0;
 
-		TextureProgress *vu_l;
-		TextureProgress *vu_r;
+		TextureProgress *vu_l = nullptr;
+		TextureProgress *vu_r = nullptr;
 	} channel[CHANNELS_MAX];
 
 	OptionButton *send;
@@ -214,9 +214,9 @@ class EditorAudioMeterNotches : public Control {
 
 private:
 	struct AudioNotch {
-		float relative_position;
-		float db_value;
-		bool render_db_value;
+		float relative_position = 0;
+		float db_value = 0;
+		bool render_db_value = false;
 
 		_FORCE_INLINE_ AudioNotch(float r_pos, float db_v, bool rndr_val) {
 			relative_position = r_pos;
diff --git a/editor/editor_autoload_settings.h b/editor/editor_autoload_settings.h
index 646fe3992c..845f86fbb9 100644
--- a/editor/editor_autoload_settings.h
+++ b/editor/editor_autoload_settings.h
@@ -50,20 +50,14 @@ class EditorAutoloadSettings : public VBoxContainer {
 	struct AutoLoadInfo {
 		String name;
 		String path;
-		bool is_singleton;
-		bool in_editor;
-		int order;
-		Node *node;
+		bool is_singleton = false;
+		bool in_editor = false;
+		int order = 0;
+		Node *node = nullptr;
 
 		bool operator==(const AutoLoadInfo &p_info) const {
 			return order == p_info.order;
 		}
-
-		AutoLoadInfo() {
-			is_singleton = false;
-			in_editor = false;
-			node = nullptr;
-		}
 	};
 
 	List<AutoLoadInfo> autoload_cache;
diff --git a/editor/editor_data.h b/editor/editor_data.h
index eec95554be..e4ef9f56a5 100644
--- a/editor/editor_data.h
+++ b/editor/editor_data.h
@@ -47,12 +47,12 @@ class EditorHistory {
 		REF ref;
 		ObjectID object;
 		String property;
-		bool inspector_only;
+		bool inspector_only = false;
 	};
 
 	struct History {
 		Vector<Obj> path;
-		int level;
+		int level = 0;
 	};
 	friend class EditorData;
 
@@ -109,14 +109,14 @@ public:
 	};
 
 	struct EditedScene {
-		Node *root;
+		Node *root = nullptr;
 		String path;
 		Dictionary editor_states;
 		List<Node *> selection;
 		Vector<EditorHistory::History> history_stored;
-		int history_current;
+		int history_current = 0;
 		Dictionary custom_state;
-		uint64_t version;
+		uint64_t version = 0;
 		NodePath live_edit_root;
 	};
 
diff --git a/editor/editor_export.h b/editor/editor_export.h
index 09feaad255..6f835f5a68 100644
--- a/editor/editor_export.h
+++ b/editor/editor_export.h
@@ -169,9 +169,9 @@ public:
 
 private:
 	struct SavedData {
-		uint64_t ofs;
-		uint64_t size;
-		bool encrypted;
+		uint64_t ofs = 0;
+		uint64_t size = 0;
+		bool encrypted = false;
 		Vector<uint8_t> md5;
 		CharString path_utf8;
 
@@ -181,15 +181,15 @@ private:
 	};
 
 	struct PackData {
-		FileAccess *f;
+		FileAccess *f = nullptr;
 		Vector<SavedData> file_ofs;
-		EditorProgress *ep;
-		Vector<SharedObject> *so_files;
+		EditorProgress *ep = nullptr;
+		Vector<SharedObject> *so_files = nullptr;
 	};
 
 	struct ZipData {
-		void *zip;
-		EditorProgress *ep;
+		void *zip = nullptr;
+		EditorProgress *ep = nullptr;
 	};
 
 	struct FeatureContainers {
@@ -294,7 +294,7 @@ class EditorExportPlugin : public Reference {
 	struct ExtraFile {
 		String path;
 		Vector<uint8_t> data;
-		bool remap;
+		bool remap = false;
 	};
 	Vector<ExtraFile> extra_files;
 	bool skipped;
diff --git a/editor/editor_file_system.h b/editor/editor_file_system.h
index d5ae046c36..f89b4db933 100644
--- a/editor/editor_file_system.h
+++ b/editor/editor_file_system.h
@@ -52,12 +52,12 @@ class EditorFileSystemDirectory : public Object {
 	struct FileInfo {
 		String file;
 		StringName type;
-		uint64_t modified_time;
-		uint64_t import_modified_time;
-		bool import_valid;
+		uint64_t modified_time = 0;
+		uint64_t import_modified_time = 0;
+		bool import_valid = false;
 		String import_group_file;
 		Vector<String> deps;
-		bool verified; //used for checking changes
+		bool verified = false; //used for checking changes
 		String script_class_name;
 		String script_class_extends;
 		String script_class_icon_path;
@@ -119,18 +119,11 @@ class EditorFileSystem : public Node {
 			ACTION_FILE_RELOAD
 		};
 
-		Action action;
-		EditorFileSystemDirectory *dir;
+		Action action = ACTION_NONE;
+		EditorFileSystemDirectory *dir = nullptr;
 		String file;
-		EditorFileSystemDirectory *new_dir;
-		EditorFileSystemDirectory::FileInfo *new_file;
-
-		ItemAction() {
-			action = ACTION_NONE;
-			dir = nullptr;
-			new_dir = nullptr;
-			new_file = nullptr;
-		}
+		EditorFileSystemDirectory *new_dir = nullptr;
+		EditorFileSystemDirectory::FileInfo *new_file = nullptr;
 	};
 
 	bool use_threads;
@@ -162,10 +155,10 @@ class EditorFileSystem : public Node {
 	/* Used for reading the filesystem cache file */
 	struct FileCache {
 		String type;
-		uint64_t modification_time;
-		uint64_t import_modification_time;
+		uint64_t modification_time = 0;
+		uint64_t import_modification_time = 0;
 		Vector<String> deps;
-		bool import_valid;
+		bool import_valid = false;
 		String import_group_file;
 		String script_class_name;
 		String script_class_extends;
@@ -175,9 +168,9 @@ class EditorFileSystem : public Node {
 	HashMap<String, FileCache> file_cache;
 
 	struct ScanProgress {
-		float low;
-		float hi;
-		mutable EditorProgressBG *progress;
+		float low = 0;
+		float hi = 0;
+		mutable EditorProgressBG *progress = nullptr;
 		void update(int p_current, int p_total) const;
 		ScanProgress get_sub(int p_current, int p_total) const;
 	};
@@ -220,7 +213,7 @@ class EditorFileSystem : public Node {
 
 	struct ImportFile {
 		String path;
-		int order;
+		int order = 0;
 		bool operator<(const ImportFile &p_if) const {
 			return order < p_if.order;
 		}
diff --git a/editor/editor_help_search.h b/editor/editor_help_search.h
index f1aab6cc81..cb52c515de 100644
--- a/editor/editor_help_search.h
+++ b/editor/editor_help_search.h
@@ -98,7 +98,7 @@ class EditorHelpSearch::Runner : public Reference {
 
 	struct ClassMatch {
 		DocData::ClassDoc *doc;
-		bool name;
+		bool name = false;
 		Vector<DocData::MethodDoc *> methods;
 		Vector<DocData::MethodDoc *> signals;
 		Vector<DocData::ConstantDoc *> constants;
@@ -118,12 +118,12 @@ class EditorHelpSearch::Runner : public Reference {
 	Ref<Texture2D> empty_icon;
 	Color disabled_color;
 
-	Map<String, DocData::ClassDoc>::Element *iterator_doc;
+	Map<String, DocData::ClassDoc>::Element *iterator_doc = nullptr;
 	Map<String, ClassMatch> matches;
-	Map<String, ClassMatch>::Element *iterator_match;
-	TreeItem *root_item;
+	Map<String, ClassMatch>::Element *iterator_match = nullptr;
+	TreeItem *root_item = nullptr;
 	Map<String, TreeItem *> class_items;
-	TreeItem *matched_item;
+	TreeItem *matched_item = nullptr;
 
 	bool _is_class_disabled_by_feature_profile(const StringName &p_class);
 
diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index d88a0e3ff8..dd136c046f 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -963,6 +963,7 @@ EditorProperty::EditorProperty() {
 	selected_focusable = -1;
 	label_reference = nullptr;
 	bottom_editor = nullptr;
+	delete_hover = false;
 }
 
 ////////////////////////////////////////////////
diff --git a/editor/editor_inspector.h b/editor/editor_inspector.h
index 10b1013486..d901bb4ecf 100644
--- a/editor/editor_inspector.h
+++ b/editor/editor_inspector.h
@@ -176,7 +176,7 @@ class EditorInspectorPlugin : public Reference {
 
 	friend class EditorInspector;
 	struct AddedEditor {
-		Control *property_editor;
+		Control *property_editor = nullptr;
 		Vector<String> properties;
 		String label;
 	};
diff --git a/editor/editor_node.h b/editor/editor_node.h
index dec28b0d2b..9d1a890f0e 100644
--- a/editor/editor_node.h
+++ b/editor/editor_node.h
@@ -107,10 +107,10 @@ public:
 		String path;
 		List<String> args;
 		String output;
-		Thread *execute_output_thread;
+		Thread *execute_output_thread = nullptr;
 		Mutex execute_output_mutex;
-		int exitcode;
-		volatile bool done;
+		int exitcode = 0;
+		volatile bool done = false;
 	};
 
 private:
@@ -409,8 +409,8 @@ private:
 
 	struct BottomPanelItem {
 		String name;
-		Control *control;
-		Button *button;
+		Control *control = nullptr;
+		Button *button = nullptr;
 	};
 
 	Vector<BottomPanelItem> bottom_panel_items;
@@ -554,8 +554,8 @@ private:
 	struct ExportDefer {
 		String preset;
 		String path;
-		bool debug;
-		bool pack_only;
+		bool debug = false;
+		bool pack_only = false;
 	} export_defer;
 
 	bool cmdline_export_mode;
diff --git a/editor/editor_properties.h b/editor/editor_properties.h
index 828b639527..63dee9f6d6 100644
--- a/editor/editor_properties.h
+++ b/editor/editor_properties.h
@@ -41,7 +41,7 @@
 
 class EditorPropertyNil : public EditorProperty {
 	GDCLASS(EditorPropertyNil, EditorProperty);
-	LineEdit *text;
+	LineEdit *text = nullptr;
 
 public:
 	virtual void update_property() override;
diff --git a/editor/editor_resource_preview.h b/editor/editor_resource_preview.h
index 2f4bc65de9..05a4e1bafb 100644
--- a/editor/editor_resource_preview.h
+++ b/editor/editor_resource_preview.h
@@ -77,9 +77,9 @@ class EditorResourcePreview : public Node {
 	struct Item {
 		Ref<Texture2D> preview;
 		Ref<Texture2D> small_preview;
-		int order;
-		uint32_t last_hash;
-		uint64_t modified_time;
+		int order = 0;
+		uint32_t last_hash = 0;
+		uint64_t modified_time = 0;
 	};
 
 	int order;
diff --git a/editor/editor_sectioned_inspector.cpp b/editor/editor_sectioned_inspector.cpp
index cf19b54cff..bc9ca15467 100644
--- a/editor/editor_sectioned_inspector.cpp
+++ b/editor/editor_sectioned_inspector.cpp
@@ -35,9 +35,9 @@
 class SectionedInspectorFilter : public Object {
 	GDCLASS(SectionedInspectorFilter, Object);
 
-	Object *edited;
+	Object *edited = nullptr;
 	String section;
-	bool allow_sub;
+	bool allow_sub = false;
 
 	bool _set(const StringName &p_name, const Variant &p_value) {
 		if (!edited) {
@@ -123,10 +123,6 @@ public:
 		edited = p_edited;
 		_change_notify();
 	}
-
-	SectionedInspectorFilter() {
-		edited = nullptr;
-	}
 };
 
 void SectionedInspector::_bind_methods() {
diff --git a/editor/editor_settings.cpp b/editor/editor_settings.cpp
index 0ea112d48c..757e26f308 100644
--- a/editor/editor_settings.cpp
+++ b/editor/editor_settings.cpp
@@ -158,10 +158,10 @@ void EditorSettings::_initial_set(const StringName &p_name, const Variant &p_val
 
 struct _EVCSort {
 	String name;
-	Variant::Type type;
-	int order;
-	bool save;
-	bool restart_if_changed;
+	Variant::Type type = Variant::Type::NIL;
+	int order = 0;
+	bool save = false;
+	bool restart_if_changed = false;
 
 	bool operator<(const _EVCSort &p_vcs) const { return order < p_vcs.order; }
 };
@@ -1540,8 +1540,8 @@ Ref<Shortcut> ED_GET_SHORTCUT(const String &p_path) {
 }
 
 struct ShortcutMapping {
-	const char *path;
-	uint32_t keycode;
+	const char *path = nullptr;
+	uint32_t keycode = 0;
 };
 
 Ref<Shortcut> ED_SHORTCUT(const String &p_path, const String &p_name, uint32_t p_keycode) {
diff --git a/editor/editor_settings.h b/editor/editor_settings.h
index 41e6bab4ba..3061da4d43 100644
--- a/editor/editor_settings.h
+++ b/editor/editor_settings.h
@@ -47,13 +47,13 @@ class EditorSettings : public Resource {
 
 public:
 	struct Plugin {
-		EditorPlugin *instance;
+		EditorPlugin *instance = nullptr;
 		String path;
 		String name;
 		String author;
 		String version;
 		String description;
-		bool installs;
+		bool installs = false;
 		String script;
 		Vector<String> install_files;
 	};
diff --git a/editor/fileserver/editor_file_server.h b/editor/fileserver/editor_file_server.h
index ca5a891856..6d3c0d0d47 100644
--- a/editor/fileserver/editor_file_server.h
+++ b/editor/fileserver/editor_file_server.h
@@ -47,11 +47,11 @@ class EditorFileServer : public Object {
 	};
 
 	struct ClientData {
-		Thread *thread;
+		Thread *thread = nullptr;
 		Ref<StreamPeerTCP> connection;
 		Map<int, FileAccess *> files;
-		EditorFileServer *efs;
-		bool quit;
+		EditorFileServer *efs = nullptr;
+		bool quit = false;
 	};
 
 	Ref<TCP_Server> server;
diff --git a/editor/filesystem_dock.h b/editor/filesystem_dock.h
index 1db1485426..c01d58dfbb 100644
--- a/editor/filesystem_dock.h
+++ b/editor/filesystem_dock.h
@@ -270,8 +270,8 @@ private:
 		String path;
 		StringName type;
 		Vector<String> sources;
-		bool import_broken;
-		uint64_t modified_time;
+		bool import_broken = false;
+		uint64_t modified_time = 0;
 
 		bool operator<(const FileInfo &fi) const {
 			return NaturalNoCaseComparator()(name, fi.name);
diff --git a/editor/find_in_files.cpp b/editor/find_in_files.cpp
index 8d3f0eb21f..abcb7bbd93 100644
--- a/editor/find_in_files.cpp
+++ b/editor/find_in_files.cpp
@@ -86,11 +86,6 @@ static bool find_next(const String &line, String pattern, int from, bool match_c
 }
 
 //--------------------------------------------------------------------------------
-FindInFiles::FindInFiles() {
-	_searching = false;
-	_whole_words = true;
-	_match_case = true;
-}
 
 void FindInFiles::set_search_text(String p_pattern) {
 	_pattern = p_pattern;
diff --git a/editor/find_in_files.h b/editor/find_in_files.h
index 3b949a35b4..d4755c7b50 100644
--- a/editor/find_in_files.h
+++ b/editor/find_in_files.h
@@ -42,8 +42,6 @@ public:
 	static const char *SIGNAL_RESULT_FOUND;
 	static const char *SIGNAL_FINISHED;
 
-	FindInFiles();
-
 	void set_search_text(String p_pattern);
 	void set_whole_words(bool p_whole_word);
 	void set_match_case(bool p_match_case);
@@ -76,15 +74,15 @@ private:
 	String _pattern;
 	Set<String> _extension_filter;
 	String _root_dir;
-	bool _whole_words;
-	bool _match_case;
+	bool _whole_words = true;
+	bool _match_case = true;
 
 	// State
-	bool _searching;
+	bool _searching = false;
 	String _current_dir;
 	Vector<PackedStringArray> _folders_stack;
 	Vector<String> _files_to_scan;
-	int _initial_files_count;
+	int _initial_files_count = 0;
 };
 
 class LineEdit;
@@ -188,10 +186,10 @@ private:
 	void _on_replace_all_clicked();
 
 	struct Result {
-		int line_number;
-		int begin;
-		int end;
-		int begin_trimmed;
+		int line_number = 0;
+		int begin = 0;
+		int end = 0;
+		int begin_trimmed = 0;
 	};
 
 	void apply_replaces_in_file(String fpath, const Vector<Result> &locations, String new_text);
diff --git a/editor/import/collada.h b/editor/import/collada.h
index 2f6db93dbc..3b6b508b28 100644
--- a/editor/import/collada.h
+++ b/editor/import/collada.h
@@ -128,7 +128,7 @@ public:
 		String name;
 		struct Source {
 			Vector<float> array;
-			int stride;
+			int stride = 0;
 		};
 
 		Map<String, Source> sources;
@@ -142,15 +142,15 @@ public:
 		struct Primitives {
 			struct SourceRef {
 				String source;
-				int offset;
+				int offset = 0;
 			};
 
 			String material;
 			Map<String, SourceRef> sources;
 			Vector<float> polygons;
 			Vector<float> indices;
-			int count;
-			int vertex_size;
+			int count = 0;
+			int vertex_size = 0;
 		};
 
 		Vector<Primitives> primitives;
@@ -168,7 +168,7 @@ public:
 		struct Source {
 			Vector<String> sarray;
 			Vector<float> array;
-			int stride;
+			int stride = 0;
 		};
 
 		Map<String, Source> sources;
@@ -200,14 +200,14 @@ public:
 		struct Weights {
 			struct SourceRef {
 				String source;
-				int offset;
+				int offset = 0;
 			};
 
 			String material;
 			Map<String, SourceRef> sources;
 			Vector<float> sets;
 			Vector<float> indices;
-			int count;
+			int count = 0;
 		} weights;
 
 		Map<String, Transform> bone_rest_map;
@@ -242,8 +242,8 @@ public:
 		Color color;
 		int uid = 0;
 		struct Weight {
-			int bone_idx;
-			float weight;
+			int bone_idx = 0;
+			float weight = 0;
 			bool operator<(const Weight w) const { return weight > w.weight; } //heaviest first
 		};
 
@@ -331,7 +331,7 @@ public:
 			};
 
 			String id;
-			Op op;
+			Op op = OP_ROTATE;
 			Vector<float> data;
 		};
 
@@ -375,7 +375,7 @@ public:
 	};
 
 	struct NodeGeometry : public Node {
-		bool controller;
+		bool controller = false;
 		String source;
 
 		struct Material {
@@ -438,7 +438,7 @@ public:
 				TYPE_MATRIX
 			};
 
-			float time;
+			float time = 0;
 			Vector<float> data;
 			Point2 in_tangent;
 			Point2 out_tangent;
@@ -463,10 +463,10 @@ public:
 
 		float unit_scale = 1.0;
 		Vector3::Axis up_axis = Vector3::AXIS_Y;
-		bool z_up;
+		bool z_up = false;
 
 		struct Version {
-			int major, minor, rev;
+			int major = 0, minor = 0, rev = 0;
 
 			bool operator<(const Version &p_ver) const { return (major == p_ver.major) ? ((minor == p_ver.minor) ? (rev < p_ver.rev) : minor < p_ver.minor) : major < p_ver.major; }
 			Version(int p_major = 0, int p_minor = 0, int p_rev = 0) {
diff --git a/editor/import/editor_import_collada.cpp b/editor/import/editor_import_collada.cpp
index 12cbaaa885..37792f2c08 100644
--- a/editor/import/editor_import_collada.cpp
+++ b/editor/import/editor_import_collada.cpp
@@ -46,29 +46,24 @@
 
 struct ColladaImport {
 	Collada collada;
-	Node3D *scene;
+	Node3D *scene = nullptr;
 
 	Vector<Ref<Animation>> animations;
 
 	struct NodeMap {
 		//String path;
-		Node3D *node;
-		int bone;
+		Node3D *node = nullptr;
+		int bone = -1;
 		List<int> anim_tracks;
-
-		NodeMap() {
-			node = nullptr;
-			bone = -1;
-		}
 	};
 
-	bool found_ambient;
+	bool found_ambient = false;
 	Color ambient;
-	bool found_directional;
-	bool force_make_tangents;
-	bool apply_mesh_xform_to_vertices;
-	bool use_mesh_builtin_materials;
-	float bake_fps;
+	bool found_directional = false;
+	bool force_make_tangents = false;
+	bool apply_mesh_xform_to_vertices = true;
+	bool use_mesh_builtin_materials = false;
+	float bake_fps = 15;
 
 	Map<String, NodeMap> node_map; //map from collada node to engine node
 	Map<String, String> node_name_map; //map from collada node to engine node
@@ -98,14 +93,6 @@ struct ColladaImport {
 	Vector<String> missing_textures;
 
 	void _pre_process_lights(Collada::Node *p_node);
-
-	ColladaImport() {
-		found_ambient = false;
-		found_directional = false;
-		force_make_tangents = false;
-		apply_mesh_xform_to_vertices = true;
-		bake_fps = 15;
-	}
 };
 
 Error ColladaImport::_populate_skeleton(Skeleton3D *p_skeleton, Collada::Node *p_node, int &r_bone, int p_parent) {
diff --git a/editor/import/editor_scene_importer_gltf.h b/editor/import/editor_scene_importer_gltf.h
index bd30f8f1dd..5ea8bf17b8 100644
--- a/editor/import/editor_scene_importer_gltf.h
+++ b/editor/import/editor_scene_importer_gltf.h
@@ -116,8 +116,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		GLTFNodeIndex fake_joint_parent = -1;
 
 		GLTFLightIndex light = -1;
-
-		GLTFNode() {}
 	};
 
 	struct GLTFBufferView {
@@ -127,8 +125,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		int byte_stride = 0;
 		bool indices = false;
 		//matrices need to be transformed to this
-
-		GLTFBufferView() {}
 	};
 
 	struct GLTFAccessor {
@@ -137,7 +133,7 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		int component_type = 0;
 		bool normalized = false;
 		int count = 0;
-		GLTFType type;
+		GLTFType type = GLTFType::TYPE_SCALAR;
 		float min = 0;
 		float max = 0;
 		int sparse_count = 0;
@@ -146,8 +142,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		int sparse_indices_component_type = 0;
 		int sparse_values_buffer_view = 0;
 		int sparse_values_byte_offset = 0;
-
-		GLTFAccessor() {}
 	};
 	struct GLTFTexture {
 		GLTFImageIndex src_image;
@@ -166,8 +160,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 
 		// Set of unique bone names for the skeleton
 		Set<String> unique_names;
-
-		GLTFSkeleton() {}
 	};
 
 	struct GLTFSkin {
@@ -204,8 +196,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		// The Actual Skin that will be created as a mapping between the IBM's of this skin
 		// to the generated skeleton for the mesh instances.
 		Ref<Skin> godot_skin;
-
-		GLTFSkin() {}
 	};
 
 	struct GLTFMesh {
@@ -218,8 +208,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		float fov_size = 64;
 		float zfar = 500;
 		float znear = 0.1;
-
-		GLTFCamera() {}
 	};
 
 	struct GLTFLight {
@@ -229,8 +217,6 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 		float range = Math_INF;
 		float inner_cone_angle = 0.0f;
 		float outer_cone_angle = Math_PI / 4.0;
-
-		GLTFLight() {}
 	};
 
 	struct GLTFAnimation {
@@ -264,11 +250,11 @@ class EditorSceneImporterGLTF : public EditorSceneImporter {
 
 	struct GLTFState {
 		Dictionary json;
-		int major_version;
-		int minor_version;
+		int major_version = 0;
+		int minor_version = 0;
 		Vector<uint8_t> glb_data;
 
-		bool use_named_skin_binds;
+		bool use_named_skin_binds = false;
 
 		Vector<GLTFNode *> nodes;
 		Vector<Vector<uint8_t>> buffers;
diff --git a/editor/import/resource_importer_texture.h b/editor/import/resource_importer_texture.h
index 97c4622731..39036d4423 100644
--- a/editor/import/resource_importer_texture.h
+++ b/editor/import/resource_importer_texture.h
@@ -60,13 +60,9 @@ protected:
 
 	Mutex mutex;
 	struct MakeInfo {
-		int flags;
+		int flags = 0;
 		String normal_path_for_roughness;
-		RS::TextureDetectRoughnessChannel channel_for_roughness;
-		MakeInfo() {
-			flags = 0;
-			channel_for_roughness = RS::TEXTURE_DETECT_ROUGNHESS_R;
-		}
+		RS::TextureDetectRoughnessChannel channel_for_roughness = RS::TEXTURE_DETECT_ROUGNHESS_R;
 	};
 
 	Map<StringName, MakeInfo> make_flags;
diff --git a/editor/import/resource_importer_texture_atlas.h b/editor/import/resource_importer_texture_atlas.h
index 9d973c3d8d..d237b096d3 100644
--- a/editor/import/resource_importer_texture_atlas.h
+++ b/editor/import/resource_importer_texture_atlas.h
@@ -38,7 +38,7 @@ class ResourceImporterTextureAtlas : public ResourceImporter {
 
 	struct PackData {
 		Rect2 region;
-		bool is_mesh;
+		bool is_mesh = false;
 		Vector<int> chart_pieces; //one for region, many for mesh
 		Vector<Vector<Vector2>> chart_vertices; //for mesh
 		Ref<Image> image;
diff --git a/editor/multi_node_edit.h b/editor/multi_node_edit.h
index 694dad76f1..3ccf06153d 100644
--- a/editor/multi_node_edit.h
+++ b/editor/multi_node_edit.h
@@ -38,7 +38,7 @@ class MultiNodeEdit : public Reference {
 
 	List<NodePath> nodes;
 	struct PLData {
-		int uses;
+		int uses = 0;
 		PropertyInfo info;
 	};
 
diff --git a/editor/plugins/animation_player_editor_plugin.h b/editor/plugins/animation_player_editor_plugin.h
index e11db1390b..17e554ee0d 100644
--- a/editor/plugins/animation_player_editor_plugin.h
+++ b/editor/plugins/animation_player_editor_plugin.h
@@ -113,9 +113,9 @@ class AnimationPlayerEditor : public VBoxContainer {
 	int current_option;
 
 	struct BlendEditor {
-		AcceptDialog *dialog;
-		Tree *tree;
-		OptionButton *next;
+		AcceptDialog *dialog = nullptr;
+		Tree *tree = nullptr;
+		OptionButton *next = nullptr;
 
 	} blend_editor;
 
@@ -131,13 +131,13 @@ class AnimationPlayerEditor : public VBoxContainer {
 	// Onion skinning.
 	struct {
 		// Settings.
-		bool enabled;
-		bool past;
-		bool future;
-		int steps;
-		bool differences_only;
-		bool force_white_modulate;
-		bool include_gizmos;
+		bool enabled = false;
+		bool past = false;
+		bool future = false;
+		int steps = 0;
+		bool differences_only = false;
+		bool force_white_modulate = false;
+		bool include_gizmos = false;
 
 		int get_needed_capture_count() const {
 			// 'Differences only' needs a capture of the present.
@@ -145,8 +145,8 @@ class AnimationPlayerEditor : public VBoxContainer {
 		}
 
 		// Rendering.
-		int64_t last_frame;
-		int can_overlay;
+		int64_t last_frame = 0;
+		int can_overlay = 0;
 		Size2 capture_size;
 		Vector<RID> captures;
 		Vector<bool> captures_valid;
diff --git a/editor/plugins/animation_state_machine_editor.h b/editor/plugins/animation_state_machine_editor.h
index f78d90bdbf..119feb417d 100644
--- a/editor/plugins/animation_state_machine_editor.h
+++ b/editor/plugins/animation_state_machine_editor.h
@@ -126,10 +126,10 @@ class AnimationNodeStateMachineEditor : public AnimationTreeNodeEditorPlugin {
 		Vector2 to;
 		AnimationNodeStateMachineTransition::SwitchMode mode;
 		StringName advance_condition_name;
-		bool advance_condition_state;
-		bool disabled;
-		bool auto_advance;
-		float width;
+		bool advance_condition_state = false;
+		bool disabled = false;
+		bool auto_advance = false;
+		float width = 0;
 	};
 
 	Vector<TransitionLine> transition_lines;
diff --git a/editor/plugins/asset_library_editor_plugin.h b/editor/plugins/asset_library_editor_plugin.h
index 9761dbba1e..b69dfc208e 100644
--- a/editor/plugins/asset_library_editor_plugin.h
+++ b/editor/plugins/asset_library_editor_plugin.h
@@ -89,10 +89,10 @@ class EditorAssetLibraryItemDescription : public ConfirmationDialog {
 	PanelContainer *previews_bg;
 
 	struct Preview {
-		int id;
-		bool is_video;
+		int id = 0;
+		bool is_video = false;
 		String video_link;
-		Button *button;
+		Button *button = nullptr;
 		Ref<Texture2D> image;
 	};
 
@@ -234,12 +234,12 @@ class EditorAssetLibrary : public PanelContainer {
 	};
 
 	struct ImageQueue {
-		bool active;
-		int queue_id;
-		ImageType image_type;
-		int image_index;
+		bool active = false;
+		int queue_id = 0;
+		ImageType image_type = ImageType::IMAGE_QUEUE_ICON;
+		int image_index = 0;
 		String image_url;
-		HTTPRequest *request;
+		HTTPRequest *request = nullptr;
 		ObjectID target;
 	};
 
diff --git a/editor/plugins/canvas_item_editor_plugin.h b/editor/plugins/canvas_item_editor_plugin.h
index 859e80befe..c4a1dca593 100644
--- a/editor/plugins/canvas_item_editor_plugin.h
+++ b/editor/plugins/canvas_item_editor_plugin.h
@@ -288,9 +288,9 @@ private:
 	MenuOption last_option;
 
 	struct _SelectResult {
-		CanvasItem *item;
-		float z_index;
-		bool has_z;
+		CanvasItem *item = nullptr;
+		float z_index = 0;
+		bool has_z = true;
 		_FORCE_INLINE_ bool operator<(const _SelectResult &p_rr) const {
 			return has_z && p_rr.has_z ? p_rr.z_index < z_index : p_rr.has_z;
 		}
@@ -308,8 +308,6 @@ private:
 		Transform2D xform;
 		float length = 0.f;
 		uint64_t last_pass = 0;
-
-		BoneList() {}
 	};
 
 	uint64_t bone_last_frame;
@@ -331,7 +329,7 @@ private:
 	struct PoseClipboard {
 		Vector2 pos;
 		Vector2 scale;
-		float rot;
+		float rot = 0;
 		ObjectID id;
 	};
 	List<PoseClipboard> pose_clipboard;
diff --git a/editor/plugins/collision_shape_2d_editor_plugin.cpp b/editor/plugins/collision_shape_2d_editor_plugin.cpp
index 105ac24950..23ab6a9de2 100644
--- a/editor/plugins/collision_shape_2d_editor_plugin.cpp
+++ b/editor/plugins/collision_shape_2d_editor_plugin.cpp
@@ -563,6 +563,8 @@ CollisionShape2DEditor::CollisionShape2DEditor(EditorNode *p_editor) {
 
 	edit_handle = -1;
 	pressed = false;
+
+	shape_type = 0;
 }
 
 void CollisionShape2DEditorPlugin::edit(Object *p_obj) {
diff --git a/editor/plugins/editor_preview_plugins.h b/editor/plugins/editor_preview_plugins.h
index 9885efc2b5..04e6be2354 100644
--- a/editor/plugins/editor_preview_plugins.h
+++ b/editor/plugins/editor_preview_plugins.h
@@ -90,7 +90,7 @@ class EditorMaterialPreviewPlugin : public EditorResourcePreviewGenerator {
 	RID light2;
 	RID light_instance2;
 	RID camera;
-	mutable volatile bool preview_done;
+	mutable volatile bool preview_done = false;
 
 	void _preview_done(const Variant &p_udata);
 
@@ -134,7 +134,7 @@ class EditorMeshPreviewPlugin : public EditorResourcePreviewGenerator {
 	RID light2;
 	RID light_instance2;
 	RID camera;
-	mutable volatile bool preview_done;
+	mutable volatile bool preview_done = false;
 
 	void _preview_done(const Variant &p_udata);
 
@@ -156,7 +156,7 @@ class EditorFontPreviewPlugin : public EditorResourcePreviewGenerator {
 	RID viewport_texture;
 	RID canvas;
 	RID canvas_item;
-	mutable volatile bool preview_done;
+	mutable volatile bool preview_done = false;
 
 	void _preview_done(const Variant &p_udata);
 
diff --git a/editor/plugins/mesh_library_editor_plugin.cpp b/editor/plugins/mesh_library_editor_plugin.cpp
index 374a8c8290..9d3498efa1 100644
--- a/editor/plugins/mesh_library_editor_plugin.cpp
+++ b/editor/plugins/mesh_library_editor_plugin.cpp
@@ -301,4 +301,6 @@ MeshLibraryEditorPlugin::MeshLibraryEditorPlugin(EditorNode *p_node) {
 	mesh_library_editor->set_anchors_and_margins_preset(Control::PRESET_TOP_WIDE);
 	mesh_library_editor->set_end(Point2(0, 22));
 	mesh_library_editor->hide();
+
+	editor = nullptr;
 }
diff --git a/editor/plugins/node_3d_editor_plugin.h b/editor/plugins/node_3d_editor_plugin.h
index 2e98fcad4c..0c5959b8a1 100644
--- a/editor/plugins/node_3d_editor_plugin.h
+++ b/editor/plugins/node_3d_editor_plugin.h
@@ -61,16 +61,10 @@ public:
 		Ref<Material> material;
 		Ref<SkinReference> skin_reference;
 		RID skeleton;
-		bool billboard;
-		bool unscaled;
-		bool can_intersect;
-		bool extra_margin;
-		Instance() {
-			billboard = false;
-			unscaled = false;
-			can_intersect = false;
-			extra_margin = false;
-		}
+		bool billboard = false;
+		bool unscaled = false;
+		bool can_intersect = false;
+		bool extra_margin = false;
 
 		void create_instance(Node3D *p_base, bool p_hidden = false);
 	};
@@ -80,7 +74,7 @@ public:
 
 	struct Handle {
 		Vector3 pos;
-		bool billboard;
+		bool billboard = false;
 	};
 
 	Vector<Vector3> handles;
@@ -296,9 +290,9 @@ private:
 	Label *fps_label;
 
 	struct _RayResult {
-		Node3D *item;
-		float depth;
-		int handle;
+		Node3D *item = nullptr;
+		float depth = 0;
+		int handle = 0;
 		_FORCE_INLINE_ bool operator<(const _RayResult &p_rr) const { return depth < p_rr.depth; }
 	};
 
@@ -375,11 +369,11 @@ private:
 		Vector3 click_ray_pos;
 		Vector3 center;
 		Vector3 orig_gizmo_pos;
-		int edited_gizmo;
+		int edited_gizmo = 0;
 		Point2 mouse_pos;
-		bool snap;
+		bool snap = false;
 		Ref<EditorNode3DGizmo> gizmo;
-		int gizmo_handle;
+		int gizmo_handle = 0;
 		Variant gizmo_initial_value;
 		Vector3 gizmo_initial_pos;
 	} _edit;
@@ -625,8 +619,8 @@ private:
 	AABB preview_bounds;
 
 	struct Gizmo {
-		bool visible;
-		float scale;
+		bool visible = false;
+		float scale = 0;
 		Transform transform;
 	} gizmo;
 
diff --git a/editor/plugins/path_3d_editor_plugin.cpp b/editor/plugins/path_3d_editor_plugin.cpp
index 280f6fafd8..dbb253dc57 100644
--- a/editor/plugins/path_3d_editor_plugin.cpp
+++ b/editor/plugins/path_3d_editor_plugin.cpp
@@ -290,6 +290,8 @@ void Path3DGizmo::redraw() {
 Path3DGizmo::Path3DGizmo(Path3D *p_path) {
 	path = p_path;
 	set_spatial_node(p_path);
+	orig_in_length = 0;
+	orig_out_length = 0;
 }
 
 bool Path3DEditorPlugin::forward_spatial_gui_input(Camera3D *p_camera, const Ref<InputEvent> &p_event) {
diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index 12790a6746..40ded6872a 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -234,15 +234,15 @@ static bool _is_built_in_script(Script *p_script) {
 
 class EditorScriptCodeCompletionCache : public ScriptCodeCompletionCache {
 	struct Cache {
-		uint64_t time_loaded;
+		uint64_t time_loaded = 0;
 		RES cache;
 	};
 
 	Map<String, Cache> cached;
 
 public:
-	uint64_t max_time_cache;
-	int max_cache_size;
+	uint64_t max_time_cache = 5 * 60 * 1000; //minutes, five
+	int max_cache_size = 128;
 
 	void cleanup() {
 		List<Map<String, Cache>::Element *> to_clean;
@@ -292,11 +292,6 @@ public:
 		return E->get().cache;
 	}
 
-	EditorScriptCodeCompletionCache() {
-		max_cache_size = 128;
-		max_time_cache = 5 * 60 * 1000; //minutes, five
-	}
-
 	virtual ~EditorScriptCodeCompletionCache() {}
 };
 
@@ -1723,11 +1718,11 @@ struct _ScriptEditorItemData {
 	String name;
 	String sort_key;
 	Ref<Texture2D> icon;
-	int index;
+	int index = 0;
 	String tooltip;
-	bool used;
-	int category;
-	Node *ref;
+	bool used = false;
+	int category = 0;
+	Node *ref = nullptr;
 
 	bool operator<(const _ScriptEditorItemData &id) const {
 		if (category == id.category) {
diff --git a/editor/plugins/script_editor_plugin.h b/editor/plugins/script_editor_plugin.h
index cc02a1ccbe..08c6a2fba7 100644
--- a/editor/plugins/script_editor_plugin.h
+++ b/editor/plugins/script_editor_plugin.h
@@ -291,7 +291,7 @@ class ScriptEditor : public PanelContainer {
 	Vector<Ref<EditorSyntaxHighlighter>> syntax_highlighters;
 
 	struct ScriptHistory {
-		Control *control;
+		Control *control = nullptr;
 		Variant state;
 	};
 
diff --git a/editor/plugins/shader_editor_plugin.cpp b/editor/plugins/shader_editor_plugin.cpp
index 5b0e1ce5b5..6e174653f6 100644
--- a/editor/plugins/shader_editor_plugin.cpp
+++ b/editor/plugins/shader_editor_plugin.cpp
@@ -714,6 +714,8 @@ ShaderEditorPlugin::ShaderEditorPlugin(EditorNode *p_node) {
 	shader_editor->set_custom_minimum_size(Size2(0, 300) * EDSCALE);
 	button = editor->add_bottom_panel_item(TTR("Shader"), shader_editor);
 	button->hide();
+
+	_2d = false;
 }
 
 ShaderEditorPlugin::~ShaderEditorPlugin() {
diff --git a/editor/plugins/skeleton_3d_editor_plugin.cpp b/editor/plugins/skeleton_3d_editor_plugin.cpp
index d662714752..22f50c0689 100644
--- a/editor/plugins/skeleton_3d_editor_plugin.cpp
+++ b/editor/plugins/skeleton_3d_editor_plugin.cpp
@@ -264,12 +264,7 @@ void BoneTransformEditor::_update_transform_properties(Transform tform) {
 }
 
 BoneTransformEditor::BoneTransformEditor(Skeleton3D *p_skeleton) :
-		skeleton(p_skeleton),
-		key_button(nullptr),
-		enabled_checkbox(nullptr),
-		keyable(false),
-		toggle_enabled(false),
-		updating(false) {
+		skeleton(p_skeleton) {
 	undo_redo = EditorNode::get_undo_redo();
 }
 
diff --git a/editor/plugins/skeleton_3d_editor_plugin.h b/editor/plugins/skeleton_3d_editor_plugin.h
index 7843fc1754..44dc1bc36e 100644
--- a/editor/plugins/skeleton_3d_editor_plugin.h
+++ b/editor/plugins/skeleton_3d_editor_plugin.h
@@ -47,13 +47,13 @@ class EditorPropertyVector3;
 class BoneTransformEditor : public VBoxContainer {
 	GDCLASS(BoneTransformEditor, VBoxContainer);
 
-	EditorInspectorSection *section;
+	EditorInspectorSection *section = nullptr;
 
-	EditorPropertyVector3 *translation_property;
-	EditorPropertyVector3 *rotation_property;
-	EditorPropertyVector3 *scale_property;
-	EditorInspectorSection *transform_section;
-	EditorPropertyTransform *transform_property;
+	EditorPropertyVector3 *translation_property = nullptr;
+	EditorPropertyVector3 *rotation_property = nullptr;
+	EditorPropertyVector3 *scale_property = nullptr;
+	EditorInspectorSection *transform_section = nullptr;
+	EditorPropertyTransform *transform_property = nullptr;
 
 	Rect2 background_rects[5];
 
@@ -62,12 +62,12 @@ class BoneTransformEditor : public VBoxContainer {
 
 	UndoRedo *undo_redo;
 
-	Button *key_button;
-	CheckBox *enabled_checkbox;
+	Button *key_button = nullptr;
+	CheckBox *enabled_checkbox = nullptr;
 
-	bool keyable;
-	bool toggle_enabled;
-	bool updating;
+	bool keyable = false;
+	bool toggle_enabled = false;
+	bool updating = false;
 
 	String label;
 
@@ -128,7 +128,6 @@ class Skeleton3DEditor : public VBoxContainer {
 	struct BoneInfo {
 		PhysicalBone3D *physical_bone = nullptr;
 		Transform relative_rest; // Relative to skeleton node
-		BoneInfo() {}
 	};
 
 	EditorNode *editor;
@@ -136,20 +135,20 @@ class Skeleton3DEditor : public VBoxContainer {
 
 	Skeleton3D *skeleton;
 
-	Tree *joint_tree;
-	BoneTransformEditor *rest_editor;
-	BoneTransformEditor *pose_editor;
-	BoneTransformEditor *custom_pose_editor;
+	Tree *joint_tree = nullptr;
+	BoneTransformEditor *rest_editor = nullptr;
+	BoneTransformEditor *pose_editor = nullptr;
+	BoneTransformEditor *custom_pose_editor = nullptr;
 
-	MenuButton *options;
-	EditorFileDialog *file_dialog;
+	MenuButton *options = nullptr;
+	EditorFileDialog *file_dialog = nullptr;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	void _on_click_option(int p_option);
 	void _file_selected(const String &p_file);
 
-	EditorFileDialog *file_export_lib;
+	EditorFileDialog *file_export_lib = nullptr;
 
 	void update_joint_tree();
 	void update_editors();
diff --git a/editor/plugins/tile_map_editor_plugin.cpp b/editor/plugins/tile_map_editor_plugin.cpp
index 6c0efcb254..189e5ec442 100644
--- a/editor/plugins/tile_map_editor_plugin.cpp
+++ b/editor/plugins/tile_map_editor_plugin.cpp
@@ -409,7 +409,7 @@ void TileMapEditor::_sbox_input(const Ref<InputEvent> &p_ie) {
 // In modern C++ this could have been inside its body.
 namespace {
 struct _PaletteEntry {
-	int id;
+	int id = 0;
 	String name;
 
 	bool operator<(const _PaletteEntry &p_rhs) const {
diff --git a/editor/plugins/tile_map_editor_plugin.h b/editor/plugins/tile_map_editor_plugin.h
index 848704e830..3a4cb22ac1 100644
--- a/editor/plugins/tile_map_editor_plugin.h
+++ b/editor/plugins/tile_map_editor_plugin.h
@@ -131,8 +131,6 @@ class TileMapEditor : public VBoxContainer {
 		bool yf = false;
 		bool tr = false;
 		Vector2 ac;
-
-		CellOp() {}
 	};
 
 	Map<Point2i, CellOp> paint_undo;
@@ -144,8 +142,6 @@ class TileMapEditor : public VBoxContainer {
 		bool flip_v = false;
 		bool transpose = false;
 		Point2i autotile_coord;
-
-		TileData() {}
 	};
 
 	List<TileData> copydata;
diff --git a/editor/plugins/visual_shader_editor_plugin.cpp b/editor/plugins/visual_shader_editor_plugin.cpp
index 6112e69299..07061a4bc5 100644
--- a/editor/plugins/visual_shader_editor_plugin.cpp
+++ b/editor/plugins/visual_shader_editor_plugin.cpp
@@ -49,7 +49,7 @@
 
 struct FloatConstantDef {
 	String name;
-	float value;
+	float value = 0;
 	String desc;
 };
 
@@ -4062,9 +4062,6 @@ void VisualShaderNodePortPreview::_notification(int p_what) {
 void VisualShaderNodePortPreview::_bind_methods() {
 }
 
-VisualShaderNodePortPreview::VisualShaderNodePortPreview() {
-}
-
 //////////////////////////////////
 
 String VisualShaderConversionPlugin::converts_to() const {
diff --git a/editor/plugins/visual_shader_editor_plugin.h b/editor/plugins/visual_shader_editor_plugin.h
index 2e7e9a8898..a5983410f9 100644
--- a/editor/plugins/visual_shader_editor_plugin.h
+++ b/editor/plugins/visual_shader_editor_plugin.h
@@ -56,26 +56,26 @@ class VisualShaderGraphPlugin : public Reference {
 
 private:
 	struct InputPort {
-		Button *default_input_button;
+		Button *default_input_button = nullptr;
 	};
 
 	struct Port {
-		TextureButton *preview_button;
+		TextureButton *preview_button = nullptr;
 	};
 
 	struct Link {
-		VisualShader::Type type;
-		VisualShaderNode *visual_node;
-		GraphNode *graph_node;
-		bool preview_visible;
-		int preview_pos;
+		VisualShader::Type type = VisualShader::Type::TYPE_MAX;
+		VisualShaderNode *visual_node = nullptr;
+		GraphNode *graph_node = nullptr;
+		bool preview_visible = 0;
+		int preview_pos = 0;
 		Map<int, InputPort> input_ports;
 		Map<int, Port> output_ports;
-		VBoxContainer *preview_box;
-		LineEdit *uniform_name;
-		OptionButton *const_op;
-		CodeEdit *expression_edit;
-		CurveEditor *curve_editor;
+		VBoxContainer *preview_box = nullptr;
+		LineEdit *uniform_name = nullptr;
+		OptionButton *const_op = nullptr;
+		CodeEdit *expression_edit = nullptr;
+		CurveEditor *curve_editor = nullptr;
 	};
 
 	Ref<VisualShader> visual_shader;
@@ -206,16 +206,16 @@ class VisualShaderEditor : public VBoxContainer {
 		String category;
 		String type;
 		String description;
-		int sub_func;
+		int sub_func = 0;
 		String sub_func_str;
 		Ref<Script> script;
-		int mode;
-		int return_type;
-		int func;
-		float value;
-		bool highend;
-		bool is_custom;
-		int temp_idx;
+		int mode = 0;
+		int return_type = 0;
+		int func = 0;
+		float value = 0;
+		bool highend = false;
+		bool is_custom = false;
+		int temp_idx = 0;
 
 		AddOption(const String &p_name = String(), const String &p_category = String(), const String &p_sub_category = String(), const String &p_type = String(), const String &p_description = String(), int p_sub_func = -1, int p_return_type = -1, int p_mode = -1, int p_func = -1, float p_value = -1, bool p_highend = false) {
 			name = p_name;
@@ -283,8 +283,8 @@ class VisualShaderEditor : public VBoxContainer {
 	static VisualShaderEditor *singleton;
 
 	struct DragOp {
-		VisualShader::Type type;
-		int node;
+		VisualShader::Type type = VisualShader::Type::TYPE_MAX;
+		int node = 0;
 		Vector2 from;
 		Vector2 to;
 	};
@@ -462,9 +462,9 @@ public:
 class VisualShaderNodePortPreview : public Control {
 	GDCLASS(VisualShaderNodePortPreview, Control);
 	Ref<VisualShader> shader;
-	VisualShader::Type type;
-	int node;
-	int port;
+	VisualShader::Type type = VisualShader::Type::TYPE_MAX;
+	int node = 0;
+	int port = 0;
 	void _shader_changed(); //must regen
 protected:
 	void _notification(int p_what);
@@ -473,7 +473,6 @@ protected:
 public:
 	virtual Size2 get_minimum_size() const override;
 	void setup(const Ref<VisualShader> &p_shader, VisualShader::Type p_type, int p_node, int p_port);
-	VisualShaderNodePortPreview();
 };
 
 class VisualShaderConversionPlugin : public EditorResourceConversionPlugin {
diff --git a/editor/progress_dialog.h b/editor/progress_dialog.h
index 753b6ac955..d8a33cc2cc 100644
--- a/editor/progress_dialog.h
+++ b/editor/progress_dialog.h
@@ -43,8 +43,8 @@ class BackgroundProgress : public HBoxContainer {
 	_THREAD_SAFE_CLASS_
 
 	struct Task {
-		HBoxContainer *hb;
-		ProgressBar *progress;
+		HBoxContainer *hb = nullptr;
+		ProgressBar *progress = nullptr;
 	};
 
 	Map<String, Task> tasks;
@@ -70,9 +70,9 @@ class ProgressDialog : public PopupPanel {
 	GDCLASS(ProgressDialog, PopupPanel);
 	struct Task {
 		String task;
-		VBoxContainer *vb;
-		ProgressBar *progress;
-		Label *state;
+		VBoxContainer *vb = nullptr;
+		ProgressBar *progress = nullptr;
+		Label *state = nullptr;
 	};
 	HBoxContainer *cancel_hb;
 	Button *cancel;
diff --git a/editor/project_manager.cpp b/editor/project_manager.cpp
index 47b1135133..3ec0c5a6a4 100644
--- a/editor/project_manager.cpp
+++ b/editor/project_manager.cpp
@@ -984,13 +984,13 @@ public:
 		String path;
 		String icon;
 		String main_scene;
-		uint64_t last_edited;
-		bool favorite;
-		bool grayed;
-		bool missing;
-		int version;
+		uint64_t last_edited = 0;
+		bool favorite = false;
+		bool grayed = false;
+		bool missing = false;
+		int version = 0;
 
-		ProjectListItemControl *control;
+		ProjectListItemControl *control = nullptr;
 
 		Item() {}
 
@@ -1076,7 +1076,7 @@ private:
 };
 
 struct ProjectListComparator {
-	FilterOption order_option;
+	FilterOption order_option = FilterOption::EDIT_DATE;
 
 	// operator<
 	_FORCE_INLINE_ bool operator()(const ProjectList::Item &a, const ProjectList::Item &b) const {
diff --git a/editor/quick_open.h b/editor/quick_open.h
index 3b199f9561..a507a0da9c 100644
--- a/editor/quick_open.h
+++ b/editor/quick_open.h
@@ -49,7 +49,7 @@ class EditorQuickOpen : public ConfirmationDialog {
 
 	struct Entry {
 		String path;
-		float score;
+		float score = 0;
 	};
 
 	struct EntryComparator {
diff --git a/editor/script_create_dialog.h b/editor/script_create_dialog.h
index 40415ea209..a73be29259 100644
--- a/editor/script_create_dialog.h
+++ b/editor/script_create_dialog.h
@@ -86,8 +86,8 @@ class ScriptCreateDialog : public ConfirmationDialog {
 		SCRIPT_ORIGIN_EDITOR,
 	};
 	struct ScriptTemplateInfo {
-		int id;
-		ScriptOrigin origin;
+		int id = 0;
+		ScriptOrigin origin = ScriptOrigin::SCRIPT_ORIGIN_EDITOR;
 		String dir;
 		String name;
 		String extension;