thatopen-impl-highlighting

To add element highlighting in a ThatOpen BIM viewer, you initialize the Highlighter for click-based selection and the Hoverer for hover feedback. This provides a consistent interactive UX for selecting and visualizing model elements.

The best way to render selection outlines is by using the Outliner component with the PostproductionRenderer. This synchronizes post-processing outlines directly with your active element selections for clear visual feedback.

Yes, you can use GPU-based element picking as an alternative to raycasting by implementing the FastModelPicker API. This provides a fast-model-picker mechanism for selecting elements within the ThatOpen viewer engine.

You can convert fragment selections into standard THREE.Mesh objects by using the Mesher API. This enables custom rendering workflows or model exports directly from your current ThatOpen viewer selection.

Yes, the highlighting implementation supports multi-select workflows, zoom-to-selection actions, and per-style filtering. These features integrate directly with the viewer world setup to manage multiple highlighted elements.

The PostproductionRenderer is required for outlining because the Outliner relies on post-processing effects to render synchronized outlines. Without it, the viewer cannot generate the visual outline strokes around selected elements.