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Extending the Nav Link Proxy
If you are wondering whether it is possible to extend Links or include them within more complex actors, the answer is "Of course, Yes! But you can only extend them in C++".
Since this book cannot cover everything, we don't have the time to deal with this in detail. However, some of the reasons why you may want to extend the Nav Link Proxy are to have a better control over the characters that enter your Link. For instance, you might want to have a Jump Pad that pushes the character through the Link. This isn't very complicated to do, and if you search for this online, you will find plenty of tutorials on how to do this using Navigation Links.
Just keep in mind that to be a good AI programmer in Unreal, you will eventually need to master this part of Nav Links as well, but for now, we are covering enough.