Node3D gizmo improvements

* Clean-up of node_3d_editor_plugin.{h,cpp}: removed unused code, fixed some bugs.
* Moved node_3d_editor_gizmos.{h,cpp} to editor/plugins.
* Added support for multiple gizmos per node. This means custom gizmos will no longer override the built-in ones and that multiple gizmos can be used in more complex nodes.
* Added support for handle IDs. When adding handles to a gizmo, an ID can be specified for each one, making it easier to work with gizmos that have a variable number of handles.
* Added support for subgizmos, selectable elements that can be transformed without needing a node of their own. By overriding _subgizmo_intersect_frustum() and/or _subgizmo_intersect_ray() gizmos can define which subgizmos should be selected on a region or click selection. Subgizmo transformations are applied using get/set/commit virtual methods, similar to how handles work.

1 files changed, 12 insertions, 8 deletions

diff --git a/scene/3d/node_3d.h b/scene/3d/node_3d.h
index fe6324c796..282f4805cc 100644
--- a/scene/3d/node_3d.h
+++ b/scene/3d/node_3d.h
@@ -90,16 +90,16 @@ class Node3D : public Node {
 		bool disable_scale = false;
 
 #ifdef TOOLS_ENABLED
-		Ref<Node3DGizmo> gizmo;
-		bool gizmo_disabled = false;
-		bool gizmo_dirty = false;
+		Vector<Ref<Node3DGizmo>> gizmos;
+		bool gizmos_disabled = false;
+		bool gizmos_dirty = false;
 #endif
 
 	} data;
 
 	NodePath visibility_parent_path;
 
-	void _update_gizmo();
+	void _update_gizmos();
 	void _notify_dirty();
 	void _propagate_transform_changed(Node3D *p_origin);
 
@@ -154,10 +154,14 @@ public:
 	void set_disable_scale(bool p_enabled);
 	bool is_scale_disabled() const;
 
-	void set_disable_gizmo(bool p_enabled);
-	void update_gizmo();
-	void set_gizmo(const Ref<Node3DGizmo> &p_gizmo);
-	Ref<Node3DGizmo> get_gizmo() const;
+	void set_disable_gizmos(bool p_enabled);
+	void update_gizmos();
+	void clear_subgizmo_selection();
+	Vector<Ref<Node3DGizmo>> get_gizmos() const;
+	Array get_gizmos_bind() const;
+	void add_gizmo(Ref<Node3DGizmo> p_gizmo);
+	void remove_gizmo(Ref<Node3DGizmo> p_gizmo);
+	void clear_gizmos();
 
 	_FORCE_INLINE_ bool is_inside_world() const { return data.inside_world; }