/// <summary>Get the tangent of the curve at a point along the path.</summary>
/// <param name="pos">Postion along the path. Need not be normalized.</param>
/// <returns>World-space direction of the path tangent.
/// Length of the vector represents the tangent strength</returns>
public override Vector3 EvaluateTangent(float pos)
{
Vector3 result = new Vector3();
if (Waypoints.Length == 0)
{
result = transform.rotation * Vector3.forward;
}
else
{
int indexA, indexB;
pos = GetBoundingIndices(pos, out indexA, out indexB);
if (indexA == indexB)
{
result = Waypoints[indexA].Tangent;
}
else
{
Waypoint wpA = Waypoints[indexA];
Waypoint wpB = Waypoints[indexB];
result = ExtSpline.BezierTangent3(pos - indexA,
Waypoints[indexA].Position, wpA.Position + wpA.Tangent,
wpB.Position - wpB.Tangent, wpB.Position);
}
}
return(transform.TransformDirection(result));
}
/// <summary>Get the tangent of the curve at a point along the path.</summary>
/// <param name="pos">Position along the path. Need not be normalized.</param>
/// <returns>World-space direction of the path tangent.
/// Length of the vector represents the tangent strength</returns>
public override Vector3 EvaluateTangent(float pos)
{
Vector3 result = transform.rotation * Vector3.forward;
if (Waypoints.Length > 1)
{
UpdateControlPoints();
int indexA, indexB;
pos = GetBoundingIndices(pos, out indexA, out indexB);
if (!Looped && indexA == Waypoints.Length - 1)
{
--indexA;
}
result = ExtSpline.BezierTangent3(pos - indexA,
Waypoints[indexA].Position, m_ControlPoints1[indexA].Position,
m_ControlPoints2[indexA].Position, Waypoints[indexB].Position);
}
return(transform.TransformDirection(result));
}
