The latest articles on DEV Community by Joseph Sen (@joseph_sen_794cde6a4dbccf). https://dev.to/joseph_sen_794cde6a4dbccf https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3391940%2F99ea4447-6431-437e-8055-8e2921ce4fb1.png https://dev.to/joseph_sen_794cde6a4dbccf en Joseph Sen Sun, 27 Jul 2025 15:12:02 +0000 https://dev.to/joseph_sen_794cde6a4dbccf/pygame-pymunk-collision-lab-tweak-mass-speed-watch-the-physics-happen-1fff https://dev.to/joseph_sen_794cde6a4dbccf/pygame-pymunk-collision-lab-tweak-mass-speed-watch-the-physics-happen-1fff <p>I built a small 2D collision sandbox to visualize elastic collisions using Pygame for rendering and Pymunk (Chipmunk2D) for physics. A tiny Tkinter launcher lets you set the initial speeds and masses of two balls. The app then displays each ball’s live speed and the post‑collision speeds captured via a Pymunk post_solve callback.</p> <p>Demo highlights</p> <p>🧪 Set speed &amp; mass for both balls before the sim starts (Tkinter dialog).</p> <p>⚙️ Real‑time physics with elasticity and friction; damping for subtle energy loss.</p> <p>📊 On‑screen HUD: current speed (px/s) for each ball + speeds right after impact.</p> <p>🧱 Static wall segments on both sides to keep objects in view.</p> <p>🟢🟥 Color‑coded bodies: Green vs. Red.</p> python gamedev simulationgames