Merge "Spline: Fix monotonicity constraint"

                                + "monotonic Y values.");

                    }

                    float h = (float) Math.hypot(a, b);

                    if (h > 9f) {

                    if (h > 3f) {

                        float t = 3f / h;

                        m[i] = t * a * d[i];

                        m[i + 1] = t * b * d[i];

                        m[i] *= t;

                        m[i + 1] *= t;

                    }

                }

            }