SceneNodeDrawer

Internal Odin property drawer for SceneNode. Renders the scene reference, dependency list, and a remove button. Handles both top-level nodes (in the SceneGraph) and nested dependency nodes.

Definition

Namespace: Paragon.Core.SceneManagement.Editor Assembly: Paragon.Editor.dll

[DrawerPriority(0.0, 0.0, 3000.0), UsedImplicitly]
internal class SceneNodeDrawer : OdinValueDrawer<SceneNode>

Inheritance: OdinValueDrawer<SceneNode> → SceneNodeDrawer

Remarks

SceneNodeDrawer has two rendering modes based on context:

1. Top-level node (parent is SceneGraph) — Draws the full scene field + dependencies list + remove button + "Add Dependency" button via SceneSelectMenu

2. Nested dependency node (parent is another SceneNode) — Draws only a read-only SceneAsset field + remove button

Reference resolution

When a SceneNode property has ValueState.Reference (i.e., it's a serialized reference to another node), the drawer resolves the actual property via ValueEntry.TargetReferencePath before drawing.

Dependency management

• Add dependency — Opens a SceneSelectMenu filtered to exclude the current scene and existing dependencies

• Remove — Context-aware: removes from SceneGraph if top-level, or removes from parent SceneNode dependencies if nested

Odin Integration

An inner AttributeProcessor configures the dependencies list with [DoNotDrawAsReference] and [ListDrawerSettings(HideRemoveButton = true)].

Methods

Initialize

protected override void Initialize()

Creates the SceneSelectMenu instance used for the "Add Dependency" popup.

DrawPropertyLayout

protected override void DrawPropertyLayout(GUIContent label)

Draws the scene node based on context:

• Top-level: Scene field + dependencies list + remove button

• Nested: Read-only SceneAsset + remove button

Common Pitfalls

Remove behavior depends on parent type Clicking the remove (X) button on a top-level node calls SceneGraph.RemoveScene(). On a nested dependency node, it calls SceneNode.RemoveDependency(). The drawer determines this by checking Property.Parent.ParentType.

Add Dependency filters existing dependencies The dependency picker only shows scenes from the SceneGraph that are not the current scene and are not already dependencies. If no scenes are available, the add button still appears but the menu is empty.

See Also

• SceneGraphEditor — The parent editor that hosts scene node drawing

• SceneDrawer — Draws the Scene field within each node

• SceneSelectMenu — Popup used for adding dependencies

• EditorSceneManager — Called to save the graph after modifications