fwater | Visual demo of a water-like effect

fwater is a C library. fwater has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This code uses the famous "two-buffer trick" to create a water-like visual effect. The idea is you have two buffers, which each store a heightmap. The pseudo-code is. The concept is simple, yet it creates a rippling kind of effect due to the wave-like values that the heights will have and the way they oscillate up and down. The waves will bounce off "walls", too, depending on the implementation; this one allows that. While a sensible implementation on modern computers will perform okay, this kind of technique is best suited to an implementation that can do many computations in parallel (e.g., a compute shader). Allegedly, the ifort compiler is supposed to help out here. Anecdotally, the performance has been good enough on this sample. It could be interesting to stress test it more.