Annotated: main.py

main

• Initializes Pygame, creates window, clock, and font.

• Instantiates Simulation and InputState.

• Frame loop:

  • Capture frame_t0 for profiling.

  • Events: handle_events updates simulation state and toggles.

  • Physics timing around sim.step_frame(); compute physics_ms.

  • Drawing:

    • Clear background; optional meter grid and field grid (timed separately).

    • Draw glow, trails, particles, velocity/force vectors.

    • Placement preview and hover tooltip.

  • Compute and display overlay with FPS, energies, and timings.

  • Flip buffers and tick at target FPS.