Simulated water flowing down a terrain
At each step, the water finds the lowest square beside the water to flood. Notice that this makes the water able to fill lakes. If the heights are
5554555
5543455
5432345
5543455
5553555
and water starts from the 4 at the top, the water will go lower until it has nowhere to go.
555W555
554W455
543W345
5543455
5553555
Then, water will go to the 3's.
555W555
554W455
54WWW45
554W455
5553555
Then it can exit!
555W555
554W455
54WWW45
554W455
555W555
Notice that there is now a small lake! This is how my algorithm works. The water flows down a slope from the highest point to the other side of the slope. It runs in Windows Terminal/PowerShell using ANSI escape codes to do colors and cursor movement.
Pictures if you can't run it:
Long picture:
Another one:
One in fullscreen:
