Spatial Regions¶

This section covers how to carve out named spatial regions within the simulation domain, use them to restrict particle generation, and reassign particle IDs by region membership.

• Defining regions — the particle_regions operator, quadric-based shapes (boxes, planes, cylinders, spheres, cones), and particle-id ranges
• Restricting particle generation — grid masks, boolean region expressions, and user-defined source functions
• Tracking particles in regions — reassigning particle IDs by region membership