`curve.divideAtT(t)`

Divide the curve into two curves at the point specified by `t`

.

Returns an array with two new curves without modifying the original curve. The function expects `t`

to lie between 0 and 1; values outside the range are constrained to 0 and 1, respectively.

This function is not a counterpart to the `line.divideAt()`

function. The relationship between `t`

and distance along a curve is complex and non-linear. If it is necessary to divide the curve at a certain `ratio`

(normalized length) away from beginning of the curve, use the `curve.divideAt()`

function.