Discovery extensibility and add-ins developer guide 2026 R1

Version 2024 R2

Last update: 09.03.2026

The 2024 R2 version of the Discovery APIs contains the following changes and additions:

Custom tree

  • Performance Enhancements: Displaying objects in the custom tree now has performance comparable to the design tree, even for a large number of objects. The creation and update times are significantly improved.
  • Selection Synchronization: The selection of objects in the custom tree is fully synchronized with their rendering. Actions such as hovering, selecting, and double-clicking in the tree are reflected in the rendering, and vice versa.
  • Drag and Drop: An additional callback for drag-and-drop completion is provided, allowing the add-in to respond to the completion of the drop action.
  • Context Menu: A right-click (RMB) entry for deleting custom objects is automatically created if the add-in permits object deletion.

HUD

  • Tool Guide Arrangement: The vertical and horizontal tool guide arrangement is respected according to the add-in definition in the XML file.
  • Automatic Validation: Automatic validation for minimum and maximum values is provided for doubles and quantities used in text boxes, based on the add-in definition in the XML file.
  • Read-Only Option: A read-only option is available to disable editing of controls while keeping the controls enabled.

Variation table

  • Enhanced APIs: An additional set of APIs is provided for object-oriented access to the rows and columns of the variation table.
  • Operation Feedback: A return type is now provided to indicate the success of the solve operations within the variation table.

API changes and incompatibilities

  • Deprecated APIs: API versions V21 and below are marked as deprecated and will be removed in the next Discovery release.

  • Namespace Renaming:

    • "ComponentTransferSharing" to "ComponentShareTopology"
    • "Appearance" to "Application"
    • Physics.Entities.Parameters to Physics.Parameters

  • Class Renaming:

    • Appearance.Properties to Application.DatumProperties

Other

  • Theme Access API: An API is now available to access the theme used by the Discovery application.
  • VTU Export: Results from the Explore stage can be exported in VTU format.

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