flyweight-pattern.md

Flyweight Design Pattern

Flyweight pattern shares state among a large number of fine-grained objects for efficiency

Problem

In a video game scene, tons of particles represented by a Particle object (containing coords, vector, color, sprite attributes) would take up a huge amount of RAM.

Solution is to separate the repeating/intrinsic/immutable states (color, sprite) from unique/extrinsic/mutable attributes (coords, vector).

Those extrinsic states are not stored inside the object, which should be passed by specific methods.

Solution