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Camille Moine
53399c2831
Add bezier(t, tMin, tMax, v1, v2, [x1, y1, x2, y2]) and the short bezier(t, v1, v2, curve) form: a CSS cubic-bezier easing curve solved with Newton-Raphson and a bisection fallback. Scalars and arrays work like linear/ease; x1/x2 clamp to 0..1, y1/y2 may overshoot, t clamps to tMin..tMax, and a curve that is not four finite numbers falls back to linear instead of throwing. Tests cover known curves (ease is [1/3, 0, 2/3, 1]), clamps, arrays, the short form, invalid curves and overshoot, plus two fuzz seeds. Closes #1884.