some points not on curve line

[DustarMao]

const y = new CubicSpline([0, .2, .5, 1], [0, .35, .5, 1]).at(.5)
console.log(y) // 0.12748344370860887 != 0.5

version: 3.0.2

[wojtus7]

Hi @DustarMao
I believe I resolved this issue here #9.
Can you check out if this change fix the problem for you?

[morganherlocker]

The patch from @wojtus7 has been published. Please try upgrading and reopen this issue if the problem persists @DustarMao.