private static Bezier3D.Vector3AnimationCurve GetTangentCache(Vector3 p0, Vector3 p1, Vector3 p2, Vector3 p3, int steps)
{
Bezier3D.Vector3AnimationCurve curve = new Bezier3D.Vector3AnimationCurve(); //time = distance, value = time
float delta = 1f / steps;
for (int i = 0; i < steps + 1; i++)
{
curve.AddKey(delta * i, GetForward(p0, p1, p2, p3, delta * i).normalized);
}
return(curve);
}
/// <summary> Constructor </summary>
/// <param name="a">Start point</param>
/// <param name="b">First handle. Local to start point</param>
/// <param name="c">Second handle. Local to end point</param>
/// <param name="d">End point</param>
public Bezier3DCurve(Vector3 a, Vector3 b, Vector3 c, Vector3 d, int steps)
{
_a = a;
_b = b;
_c = c;
_d = d;
_B = a + b;
_C = d + c;
_isLinear = b.sqrMagnitude == 0f && c.sqrMagnitude == 0f;
_cache = GetDistanceCache(a, a + b, c + d, d, steps);
_tangentCache = GetTangentCache(a, a + b, c + d, d, steps);
_length = _cache.keys[_cache.keys.Length - 1].time;
}
public Serializable(Vector3AnimationCurve curve)
{
curve.xV.Serialize(out xT, out xV);
curve.yV.Serialize(out yT, out yV);
curve.zV.Serialize(out zT, out zV);
}