In UE2 we had a simple but fun feature called a FluidSurfaceInfo. This was a small, simulated fluid surface that you could place in your level, and would respond to the player running through it and shooting it. It was requested that we bring back this feature in UE4. So I am posting the original source from UE2, if anyone is interested in porting it to UE4 as a plugin! I made a page on the wiki with the source code here:
This is a CPU implementation. In UE3 we had a more sophisticated GPU-based fluid surface implementation, but I don't really know that code, and I thought this would be a simpler place to start. I would look at the CableComponent plugin to give an example of how to set up a plugin and render custom geometry each frame. This is _not_ intended to be an 'ocean surface' feature, but something useful for small pools of water (or, you know, toxic acid, lava, the usual...). This is UE2 source, back when we had .uc files, so the first job will be turning those into UE4 decorated C++ headers.
I'm happy to try and answer any questions about here it here on the forums (if I can remember!) and I'm sorry for the lack of comments . If anyone makes some progress, please post your github branch here so others can check it out and contribute