clampToZero()

Replaces the components of a p5.Vector that are very close to zero with zero.

In computers, handling numbers with decimals can give slightly imprecise answers due to the way those numbers are represented. This can make it hard to check if a number is zero, as it may be close but not exactly zero. This method rounds very close numbers to zero to make those checks easier

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON