sandpypi/python/plansandideas/REORGANIZATION.md

Physics Module Reorganization Plan

1. particle.py

Contains core particle functionality:

• Full Particle class definition
• particle_properties handling
• create_particle()
• create_particle_circle()
• transform_particle()
• get_particle_state()

2. forces.py

Physics and movement systems:

• calculate_forces()
• _apply_neighbor_forces()
• apply_gravity()
• apply_physics()
• add_wind_zone()
• handle_gas_movement()

3. interactions.py

Particle interaction handling:

• handle_particle_interactions()
• process_interaction()
• mix_liquids()
• create_mud()
• handle_particle_damage()
• _get_quick_neighbors()

4. temperature.py

Temperature and state management:

• handle_temperature()
• handle_phase_transitions()
• burning()
• spread_fire()
• ignite_particle()
• handle_special_particles()

5. grid.py

Spatial management systems:

• update_spatial_grid()
• get_cell_key()
• add_to_spatial_grid()
• remove_from_spatial_grid()
• _get_neighbors_from_grid()
• _wake_neighbors()
• clear_particles_circle()

6. simulation.py

Core simulation coordination:

• Simulation class (main orchestrator)
• simulate_step()
• track_tps()
• reset_particle_count()
• get_accurate_particle_count()

Migration Steps

1. Create new files
2. Move related code sections
3. Update imports
4. Test each component
5. Update main simulation.py references