Dragutin Sredojević

A complete billiards game I built and shipped on my own for Android. It runs on custom ball physics I worked out from the equations of motion, with responsive aiming and a UI that adapts to both portrait and landscape. I built a small in-house editor to lay out the levels, added an in-app shop for cues, and tuned the whole thing to hold a steady frame rate across a range of phones.

An event-driven billiard physics engine I published on the Unity Asset Store. It uses Unity's Jobs system and the Burst compiler for fast multithreaded simulation, with optimization ideas borrowed from commercial engines. It ships with documentation and has a steady base of customers.

A rigid-body physics engine I am writing from scratch. It does narrow-phase collision detection with GJK on the Minkowski difference for convex shapes, then resolves contacts with an impulse-based solver. The goal is to understand real-time simulation from first principles.

A small real-time graphics engine I wrote from scratch in C with OpenGL for my Computer Graphics course. The demo renders a robotic arm in a lit 3D scene and lets you explore its full range of motion.

A low-level multiplayer networking layer built on ENet over reliable UDP. I used it to explore snapshot and state synchronization for fast-paced real-time games.

A chess engine with move generation and search. Writing it taught me a lot about low-level optimization, bitboards and performance-critical code, and about how much that work matters for game AI.