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# Implementing pressure curves

<figure><img src="/files/FnGJh8ZKt32B22DLF20S" alt=""><figcaption></figcaption></figure>

Ultimately a pressure curve is a mathematical function that takes input logical pressure (p) and returns an output logical pressure (p’)

that is it maps logical pressure to logical pressure. The logical pressure comes in as a value between zero and one, and the output is a logical pressure between zero and one. The specifics of the mapping of the input to the output are completely arbitrary and we can make pressure curves do whatever we want.

<figure><img src="/files/lbR7dETIApMeZZeBRSiZ" alt=""><figcaption></figcaption></figure>

In reality we wouldn't just have one pressure curve function with a single input logical pressure parameter like that. More typically we'd have a pressure curve function that accepts multiple parameters. By tweaking these additional parameters we can control what the pressure curve is actually doing in a dynamic way.