> For the complete documentation index, see [llms.txt](https://fish-networking.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fish-networking.gitbook.io/docs/fishnet-building-blocks/components/prediction/network-collider.md).

# Network Collider

Each component offers callbacks for OnEnter, OnStay, and OnExit, which work even during the prediction cycle. These components are needed because of a limitation in Unity's physics system that affects their OnCollisionEnter and OnCollisionExit methods, causing them to not always be executed.

{% hint style="success" %}
Fun fact: Fish-Networking is the only framework which provides a solution for using Enter/Exit collider callbacks with prediction!
{% endhint %}

{% hint style="warning" %}
Due to the complexity of physics with prediction we currently only support these components on primitive shapes: box, cube, sphere, circle, etc.
{% endhint %}


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