Lesson 11
Particle (lifetime/màu/alpha), emitter rate, lực lên hạt, lerp theo tuổi, object pool.
Lesson 12
Verlet + distance constraint (Jakobsen), giải lặp, dây/chuỗi, vải (cloth), ragdoll, tearing.
Lesson 13
Steering behaviors (seek/flee/arrive), 3 luật boids (separation/alignment/cohesion), emergent.
Lesson 14
Entity-Component-System, composition over inheritance, state machine, lifecycle, camera.
Lesson 15
Tilemap (ô↔pixel), lưới→đồ thị, BFS/Dijkstra, A* (f=g+h) tìm đường — tổng kết lĩnh vực.