Function set

set(x, y, z, dst?): Vec3
Sets the values of a Vec3 Also see vec3.create and vec3.copy
Parameters
- x: number
  first value
- y: number
  second value
- z: number
  third value
- Optional dst: Vec3
  vector to hold result. If not passed in a new one is created.
Returns Vec3
A vector with its elements set.