Function perlin4D

perlin4D(x, y, z, t): number
Returns a four-dimensional noise value between -1 and 1.
Parameters
- x: number
  
  A numeric expression.
- y: number
  
  A numeric expression.
- z: number
  
  A numeric expression.
- t: number
  
  A numeric expression.
Returns number
Perlin Noise value.