I'm not entirely clear on what's going on with gs and hs - but at least gs seem to only be used with an additional multiply with distance - but I don't think th

I'm not entirely clear on what's going on with gs and hs - but at least gs seem to only be used with an additional multiply with distance - but I don't think that immediately allows to simplify away the sqrt by squaring both sides of the divide in the definition? let gs = 2. * weight * (distance - ideal_distance) / (ideal_distance_squared * distance); let distance_cubed = distance_squared * distance; unsafe { *self.g.get_unchecked_mut( i * n + u) += distance * gs }; } But hs seems to simplify to 0 in how it's used?: let hs = 2. * -weight / (ideal_distance_squared * distance_cubed); let idk = hs * (2. * distance_cubed + ideal_distance * (distance * distance - distance_squared)); Unless the intent is some kind of float precision error handling? (distance * distance - distance_squared) = (distance_squared - distance_squared) = 0 Or is hs and gs used for something I'm missing?(could be, I'm on mobile)