cubicHermite method

V3 cubicHermite(
  1. V3 tangent1,
  2. V3 v2,
  3. V3 tangent2,
  4. double amount,
)

Implementation

V3 cubicHermite(V3 tangent1, V3 v2, V3 tangent2, double amount) {
  final p2 = amount*amount;
  final p3 = amount*amount*amount;

  return _v3(
    (2*p3 - 3*p2 + 1)*x + (p3 - 2*p2 + amount)*tangent1.x + (-2*p3 + 3*p2)*v2.x + (p3 - p2)*tangent2.x,
    (2*p3 - 3*p2 + 1)*y + (p3 - 2*p2 + amount)*tangent1.y + (-2*p3 + 3*p2)*v2.y + (p3 - p2)*tangent2.y,
    (2*p3 - 3*p2 + 1)*z + (p3 - 2*p2 + amount)*tangent1.z + (-2*p3 + 3*p2)*v2.z + (p3 - p2)*tangent2.z,
  );
}