Newton first, bisection as the fallback, and the fallback is not
decoration: Newton stalls where the curve is near-flat, and bisection cannot.
The iteration cap and epsilon are v1's, and they are part of the answer
rather than of the performance — a different cap converges to a different
last bit, so the vectors pin them as surely as they pin the algebra.
The CSS
cubic-bezier(x1, y1, x2, y2)curve.Newton first, bisection as the fallback, and the fallback is not decoration: Newton stalls where the curve is near-flat, and bisection cannot. The iteration cap and epsilon are v1's, and they are part of the answer rather than of the performance — a different cap converges to a different last bit, so the vectors pin them as surely as they pin the algebra.