Is it possible to create a c++ custom node that dynamically creates input pins

Development Programming & Scripting C++
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1

I was coming up with ideas for new plugins I could create but one of them requires something I swear I’ve seen a default node do, though I can’t remember which one.

I was curious if it is possible to make a custom blueprint node which would, based on the text inputted in its initial pin, expand the amount of pins available to allow for input, allowing the use of a single dynamic node rather than an Append followed by the node.

Basically, an input such as: Hello {PlayerName}, Welcome to {TownName}.
would change the node to not only contain the initial input string.
but also a pin called PlayerName, and a pin called TownName.
(this is of course just an example)

2

To do that you have to extend from K2 nodes;
They are actually much more complicated to work with then common UFUNCTION() pattern.

3

You’re looking at “Format Text” Blueprint node.

As to nodes that can expand parameter list, they are way more complicated than regular ones. You’ll need a separate class that inherits from UK2Node (e.g. UK2Node_FormatText in Engine\Source\Editor\BlueprintGraph\Classes\K2Node_FormatText.h).

However, creating such functions is rather complicated and isn’t documented.

4

Thank you for the reply, i’ll have a look into extending from K2 nodes

5

Thank you for the rather detailed answer on how one would create such a node