[Java] [Processing] Can Perlin noise return in the opposite direction?

less than 1 minute read

result

2020-07-27 (3).png
I wanted to find out the start position from the position of the particles after moving along Perlin noise, but I felt like I couldn’t, so I checked it. It seems that you cannot return to the same position just by moving backward normally. If there is a good way, please leave a comment.

code

https://gist.github.com/Nekodigi/8f5a1dea37d738130a637de91f56368c