thatopen-impl-federation

Multi-model IFC alignment requires setting a base coordination model and matrix before loading additional files. You load the first IFC model, assign the base coordination matrix, then load subsequent models with coordinate alignment enabled to transform them into the same world space.

Cross-model visibility control uses a Hider with ModelIdMap to set, isolate, or toggle element visibility reliably across multiple loaded IFC models. Classifier filters build ModelIdMaps for category, storey, or model-based operations without visual flicker.

You can compute unified bounds for camera framing across multiple IFC models using BoundingBoxer. It calculates bounds and centers, allowing you to orient the camera front, back, left, right, top, or bottom for consistent multi-model views.

Federated IFC models scatter when multiple files load with mismatched coordinate systems and unmanaged visibility. You must set the base coordination model and base coordination matrix before loading additional models to align heterogeneous authoring origins.

The best way to isolate a discipline in a multi-model IFC federation is using Classifier with byModel and find filters to build a ModelIdMap. You then pass this ModelIdMap to the Hider to isolate MEP elements without visual flicker.