Display a editor gizmo icon for Listener3D

The icon was present in `editor/icons/`, but it was never implemented
in the editor gizmos code.

This also removes some unused gizmo drawing code (overridden methods
that are no longer called anywhere).

editor/plugins/node_3d_editor_gizmos.cpp

@@ -1481,8 +1481,6 @@ void Light3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 	}
 }
 
-//////
-
 //// player gizmo
 AudioStreamPlayer3DGizmoPlugin::AudioStreamPlayer3DGizmoPlugin() {
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/stream_player_3d", Color(0.4, 0.8, 1));
@@ -1621,6 +1619,29 @@ void AudioStreamPlayer3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 
 //////
 
+Listener3DGizmoPlugin::Listener3DGizmoPlugin() {
+	create_icon_material("listener_3d_icon", Node3DEditor::get_singleton()->get_theme_icon("GizmoListener3D", "EditorIcons"));
+}
+
+bool Listener3DGizmoPlugin::has_gizmo(Node3D *p_spatial) {
+	return Object::cast_to<Listener3D>(p_spatial) != nullptr;
+}
+
+String Listener3DGizmoPlugin::get_gizmo_name() const {
+	return "Listener3D";
+}
+
+int Listener3DGizmoPlugin::get_priority() const {
+	return -1;
+}
+
+void Listener3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
+	const Ref<Material> icon = get_material("listener_3d_icon", p_gizmo);
+	p_gizmo->add_unscaled_billboard(icon, 0.05);
+}
+
+//////
+
 Camera3DGizmoPlugin::Camera3DGizmoPlugin() {
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/camera", Color(0.8, 0.4, 0.8));
 

editor/plugins/node_3d_editor_gizmos.h

@@ -249,6 +249,19 @@ public:
 	AudioStreamPlayer3DGizmoPlugin();
 };
 
+class Listener3DGizmoPlugin : public EditorNode3DGizmoPlugin {
+	GDCLASS(Listener3DGizmoPlugin, EditorNode3DGizmoPlugin);
+
+public:
+	bool has_gizmo(Node3D *p_spatial) override;
+	String get_gizmo_name() const override;
+	int get_priority() const override;
+
+	void redraw(EditorNode3DGizmo *p_gizmo) override;
+
+	Listener3DGizmoPlugin();
+};
+
 class Camera3DGizmoPlugin : public EditorNode3DGizmoPlugin {
 	GDCLASS(Camera3DGizmoPlugin, EditorNode3DGizmoPlugin);
 

editor/plugins/node_3d_editor_plugin.cpp

@@ -6863,6 +6863,7 @@ void Node3DEditor::_register_all_gizmos() {
 	add_gizmo_plugin(Ref<Camera3DGizmoPlugin>(memnew(Camera3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<Light3DGizmoPlugin>(memnew(Light3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<AudioStreamPlayer3DGizmoPlugin>(memnew(AudioStreamPlayer3DGizmoPlugin)));
+	add_gizmo_plugin(Ref<Listener3DGizmoPlugin>(memnew(Listener3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<MeshInstance3DGizmoPlugin>(memnew(MeshInstance3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<OccluderInstance3DGizmoPlugin>(memnew(OccluderInstance3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<SoftBody3DGizmoPlugin>(memnew(SoftBody3DGizmoPlugin)));

scene/3d/camera_3d.cpp

@@ -254,10 +254,6 @@ bool Camera3D::is_current() const {
 	}
 }
 
-bool Camera3D::_can_gizmo_scale() const {
-	return false;
-}
-
 Vector3 Camera3D::project_ray_normal(const Point2 &p_pos) const {
 	Vector3 ray = project_local_ray_normal(p_pos);
 	return get_camera_transform().basis.xform(ray).normalized();

scene/3d/camera_3d.h

@@ -79,8 +79,6 @@ private:
 	Ref<Environment> environment;
 	Ref<CameraEffects> effects;
 
-	virtual bool _can_gizmo_scale() const;
-
 	// void _camera_make_current(Node *p_camera);
 	friend class Viewport;
 	void _update_audio_listener_state();

scene/3d/light_3d.cpp

@@ -30,10 +30,6 @@
 
 #include "light_3d.h"
 
-bool Light3D::_can_gizmo_scale() const {
-	return false;
-}
-
 void Light3D::set_param(Param p_param, real_t p_value) {
 	ERR_FAIL_INDEX(p_param, PARAM_MAX);
 	param[p_param] = p_value;

scene/3d/light_3d.h

@@ -86,8 +86,6 @@ private:
 protected:
 	RID light;
 
-	virtual bool _can_gizmo_scale() const;
-
 	static void _bind_methods();
 	void _notification(int p_what);
 	virtual void _validate_property(PropertyInfo &property) const override;

scene/3d/listener_3d.cpp

@@ -141,16 +141,6 @@ bool Listener3D::is_current() const {
 	return false;
 }
 
-bool Listener3D::_can_gizmo_scale() const {
-	return false;
-}
-
-RES Listener3D::_get_gizmo_geometry() const {
-	Ref<ArrayMesh> mesh = memnew(ArrayMesh);
-
-	return mesh;
-}
-
 void Listener3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("make_current"), &Listener3D::make_current);
 	ClassDB::bind_method(D_METHOD("clear_current"), &Listener3D::clear_current);
@@ -160,7 +150,6 @@ void Listener3D::_bind_methods() {
 
 Listener3D::Listener3D() {
 	set_notify_transform(true);
-	//active=false;
 }
 
 Listener3D::~Listener3D() {

scene/3d/listener_3d.h

@@ -42,9 +42,6 @@ private:
 
 	RID scenario_id;
 
-	virtual bool _can_gizmo_scale() const;
-	virtual RES _get_gizmo_geometry() const;
-
 	friend class Viewport;
 	void _update_audio_listener_state();
 

scene/scene_string_names.cpp

@@ -91,9 +91,6 @@ SceneStringNames::SceneStringNames() {
 	update = StaticCString::create("update");
 	updated = StaticCString::create("updated");
 
-	_get_gizmo_geometry = StaticCString::create("_get_gizmo_geometry");
-	_can_gizmo_scale = StaticCString::create("_can_gizmo_scale");
-
 	_physics_process = StaticCString::create("_physics_process");
 	_process = StaticCString::create("_process");
 

scene/scene_string_names.h

@@ -111,9 +111,6 @@ public:
 	StringName _body_inout;
 	StringName _area_inout;
 
-	StringName _get_gizmo_geometry;
-	StringName _can_gizmo_scale;
-
 	StringName _physics_process;
 	StringName _process;
 	StringName _enter_world;