Gizmo that is used for providing custom visualization and editing (handles and subgizmos) for Spatial objects. Can be overridden to create custom gizmos, but for simple gizmos creating a [EditorSpatialGizmoPlugin] is usually recommended.
Adds collision triangles to the gizmo for picking. A [TriangleMesh] can be generated from a regular [Mesh] too. Call this method during [method redraw].
Adds a list of handles (points) which can be used to edit the properties of the gizmo's Spatial. The [code]ids[/code] argument can be used to specify a custom identifier for each handle, if an empty [code]Array[/code] is passed, the ids will be assigned automatically from the [code]handles[/code] argument order.
There are virtual methods which will be called upon editing of these handles. Call this method during [method _redraw].
Adds lines to the gizmo (as sets of 2 points), with a given material. The lines are used for visualizing the gizmo. Call this method during [method redraw].
Adds a mesh to the gizmo with the specified [code]material[/code], local [code]transform[/code] and [code]skeleton[/code]. Call this method during [method _redraw].
Override this method to commit a handle being edited (handles must have been previously added by [method add_handles]). This usually means creating an [UndoRedo] action for the change, using the current handle value as "do" and the [code]restore[/code] argument as "undo".
If the [code]cancel[/code] argument is [code]true[/code], the [code]restore[/code] value should be directly set, without any [UndoRedo] action.
Override this method to commit a group of subgizmos being edited (see [method _subgizmos_intersect_ray] and [method _subgizmos_intersect_frustum]). This usually means creating an [UndoRedo] action for the change, using the current transforms as "do" and the [code]restore[/code] transforms as "undo".
If the [code]cancel[/code] argument is [code]true[/code], the [code]restore[/code] transforms should be directly set, without any [UndoRedo] action.
Override this method to return the current value of a handle. This value will be requested at the start of an edit and used as the [code]restore[/code] argument in [method _commit_handle].
Override this method to return the current transform of a subgizmo. This transform will be requested at the start of an edit and used as the [code]restore[/code] argument in [method _commit_subgizmos].
Override this method to add all the gizmo elements whenever a gizmo update is requested. It's common to call [method clear] at the beginning of this method and then add visual elements depending on the node's properties.
Override this method to update the node properties when the user drags a gizmo handle (previously added with [method add_handles]). The provided [code]point[/code] is the mouse position in screen coordinates and the [code]camera[/code] can be used to convert it to raycasts.
Override this method to update the node properties during subgizmo editing (see [method _subgizmos_intersect_ray] and [method _subgizmos_intersect_frustum]). The [code]transform[/code] is given in the Spatial's local coordinate system.
Override this method to allow selecting subgizmos using mouse drag box selection. Given a [code]camera[/code] and a [code]frustum[/code], this method should return which subgizmos are contained within the frustum. The [code]frustum[/code] argument consists of an [code]Array[/code] with all the [code]Plane[/code]s that make up the selection frustum. The returned value should contain a list of unique subgizmo identifiers, which can have any non-negative value and will be used in other virtual methods like [method _get_subgizmo_transform] or [method _commit_subgizmos].
Override this method to allow selecting subgizmos using mouse clicks. Given a [code]camera[/code] and a [code]point[/code] in screen coordinates, this method should return which subgizmo should be selected. The returned value should be a unique subgizmo identifier, which can have any non-negative value and will be used in other virtual methods like [method _get_subgizmo_transform] or [method _commit_subgizmos].
