# Component
### Contents
[About](#About)

## About
Components are raw data that gets associated with an entity.

For an Object-Oriented language like Java, they are objects.

Each component is an array of objects, containing the data that should be associated with the entity.

E.g.: A position component is defined such as:
``` java
class position{
    double x = 0.0;
    double y = 0.0;
}
```

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As the component is simply an object, the associated data can be anything, including scripts:
``` java
class script{
    String statement = "";
    Function<void> foo = () -> {
        statement += "boo";
    };
}
```

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<br>

Two different usages of this data can then be applied:
1. System-less data usage - which stores data but does not have a system that interacts with it every frame

and 

2. System-based interaction - which utilises the current data (of one or more components) to check if certain conditions have been met. 

I.e.:

The `position` component might not have a `position_system`, but may be utilised by the `collision_system`, which may use `position.x` and `position.y` to determine the location of the entity.

See [System](../system/system.md) for more information.