34 lines
813 B
Markdown
34 lines
813 B
Markdown
---
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title: "Component"
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date: 2019-05-22T12:51:29-07:00
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weight: 5
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---
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A Component is a collection of related data.
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To define a Component, extend the Component class.
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```ts
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import { Component } from "encompass-ecs";
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class PositionComponent extends Component {
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public x: number;
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public y: number;
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}
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```
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Components are created in context with an Entity.
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```ts
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const entity = World.create_entity();
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const position = entity.add_component(PositionComponent);
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position.x = 3;
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position.y = -4;
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```
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Components cannot exist apart from an Entity and are automagically destroyed when they are removed or their Entity is destroyed.
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{{% notice warning %}}
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Components should **never** reference other Components. This breaks the principle of loose coupling. You **will** regret it if you do this.
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{{% /notice %}}
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