Module physics 

Physics domain engine.

Implements numerical integration for physical simulations:

• Verlet (symplectic, 2nd order)
• Euler (1st order)
• RK4 (4th order)

Energy Conservation

Symplectic integrators (Verlet) preserve phase space volume, leading to bounded energy error over long simulations.

Structs

CentralForceField

Central force field (e.g., gravity toward origin).

EulerIntegrator

Euler integrator (1st order, non-symplectic).

GravityField

Simple gravity force field.

PhysicsEngine

Physics engine wrapper.

RK4Integrator

Runge-Kutta 4th order integrator.

VerletIntegrator

Störmer-Verlet symplectic integrator.

Traits

ForceField

Force field trait for computing accelerations.

Integrator

Numerical integrator trait.