Automated Regression Test Matrix

This simulator visualizes how automated testing actually validates a physics simulation: a grid of projectile-motion test cases, each launched at a different speed and angle, is checked one by one against a closed-form analytic baseline using the Root Mean Square Error. A "model under test" — a numerically integrated trajectory that can carry an injected drag bug — is swept across the whole parameter grid exactly as a CI/CD pipeline would re-run a regression suite after a code change, and each 3D bar rises to its case's RMSE and turns green or red the moment it crosses the tolerance threshold you set.