Can you give me a basic description of how the simplex noise algorithm works?
Sure, I'd be happy to explain how simplex noise works!

Simplex noise is a type of gradient noise that was developed by Ken Perlin in 2001 as an improvement over his earlier Perlin noise algorithm. Like Perlin noise, simplex noise is used to generate natural-looking textures and patterns in computer graphics and other applications.

The basic idea behind simplex noise is to divide space into a grid of simplexes, which are n-dimensional analogues of triangles. For example, in two dimensions, a simplex is a triangle, and in three dimensions, it is a tetrahedron. The vertices of these simplexes are randomly placed and assigned gradient vectors, which represent the direction and magnitude of the gradient at that point.

To generate a value for a given point in space, simplex noise first determines which simplex contains that point. It then computes a weighted sum of the gradients at the simplex's vertices, with the weights determined by the distance between the point and each vertex. The resulting value is then scaled and smoothed to produce a final noise value.

The process of determining which simplex contains a given point involves comparing the point's position relative to the simplexes. For example, in two dimensions, if the point is to the left of an edge of the simplex, it is considered to be outside of the simplex.

Overall, simplex noise is a powerful and versatile algorithm that can be used for a wide range of applications, including generating terrain, simulating fluid dynamics, and creating procedural textures.
How does simplex noise compare to other types of noise algorithms, such as Perlin noise or Worley noise? Are there certain situations where one type of noise algorithm might be better suited than another?