Graphmath.Vec3.random_sphere

You're seeing just the function random_sphere, go back to Graphmath.Vec3 module for more information.
Link to this function

random_sphere()

Specs

random_sphere() :: vec3()

random_sphere() gives a point at or within unit distance of the origin, using this polar method. Another really nice exploration of this is here.

It returns a vec3 within at most unit distance of the origin.