# Introduction

The OtterLib is a game library that allows you to build your game using an ECS engine.

A Ecs is a concept used for develop game with a more efficient way. Where a object don't store is data and fonction but only refer to them. Letting the place to store optimalment the data

# Definition

A ECS is a concept of game engine where we split a game into 4 Part:

Entity,Components, System and the engine/core.

Each element in the game is a ensemble of this 4 part.

• A basic element is a unique Entity.
• Is propriete and data are difined in the components linked to is Entity
• Each Entity are update when they posses a composant update by a system
• a Core who manage/union all of the other

# Entity

A entity not composed of composant but insted represent a class ID for searching all composant associed.

# Components

A composant is a data struct where we only put data and method to manage them in simple way.

Each Component are stored by type. in a Giant array for optimaz the loading of data.

# System

A System is A function. (can be any type of fucntion)
It don't update a Entity in specific but a ensemble of Composant. in this way we generalise the comportement of the object need and create a fewer function to update them with logical.

The system respect the concept of functionnel and only do one task.

ex: Moving system, he apply the velocity to the trasform this system only do this to all the composant available