Designing a Flexible Ability System in Games Using the Chain of Responsibility Pattern | HackerNoon
Briefly

Ability systems in game development require a high degree of flexibility since predicting final abilities and future updates is nearly impossible. At their core, abilities consist of actions, but complexity arises in determining their usability. A flexible, modular architecture decouples ability execution from its conditional checks, such as cooldowns, mana, or target distance. By isolating these checks into individual, chainable components, duplication is avoided, allowing for more efficient updates and a more resilient system to changes in design.
In game development, the ability system is one of the most demanding components in terms of flexibility due to unpredictable elements like spells and abilities.
An ability is essentially a set of actions, but complexity arises in determining whether it can or should be executed.
A flexible, modular approach decouples ability execution from its conditions, allowing for easier updates and future expansion.
By extracting ability checks into individual components and linking them in a chain, we avoid duplication and enhance the system's flexibility.
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