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C#:

double xChange = positionRatio * leftChange + (1 - positionRatio) * rightChange;

And for those curious, the magical formula that fixed everything.

Sono

So... rightChange + (positionRatio * (leftChange - rightChange)) ?

fyi, this is

Code:

lerp(p1, p2, alpha) => ((1-alpha) * p1) + (alpha * p2)
lerp(p1, p2, alpha) => p1 + (alpha * (p2 - p1))

The Real Jdbye