Picking Backend

File: src/interaction/picking.rs

What It Does

• reads pointer locations
• converts pointer coordinates from viewport space into world space
• evaluates candidate nodes with an SDF rounded-box test
• rejects hits clipped by ancestors through UClip
• removes an ancestor hit if a deeper child wins in the same path

Important Details

• the main query targets entities that carry UInteraction
• final ordering combines:
  • tree depth
  • root capsule precedence
  • local depth inside the same root

Clip Accuracy

The backend walks clip ancestors, converts the pointer into local space for each one, and evaluates sd_rounded_box against clip bounds. This keeps picking aligned with visible clipping.