This project is an interactive 2D ray-tracing simulator written in Kotlin using Java Swing.
It primitively models seismic waves within the earth using Snell’s Law, refraction, reflection, and change in velocities between mediums. The user can drag the initial ray with the mouse, and the simulation updates in real time.

• Physics-accurate Snell’s Law refraction
• Presets for different planetary bodies
  • Currently includes an Earth and a simple preset
• Support for different seismic wave types (P-waves and S-waves)
• Total Internal Reflection (TIR) automatically handled
• Rays continue bouncing/refracting until a bounce limit is reached
• Real-time ray movement via mouse control
• Implements vector geometry for angle calculations
• Clean class structure:
  • Vector2 – vector math utilities
  • Ray – origin + direction
  • Circle – refractive boundary geometry
  • Intersections – geometric intersection routines
  • RayTracer – performs recursive refraction/reflection