/// <summary>Get the orientation the curve at a point along the path.</summary>
/// <param name="pos">Position along the path. Need not be normalized.</param>
/// <returns>World-space orientation of the path, as defined by tangent, up, and roll.</returns>
public override Quaternion EvaluateOrientation(float pos)
{
Quaternion result = transform.rotation;
if (Waypoints.Length > 0)
{
float roll = 0;
int indexA, indexB;
pos = GetBoundingIndices(pos, out indexA, out indexB);
if (indexA == indexB)
{
roll = Waypoints[indexA].Roll;
}
else
{
UpdateControlPoints();
roll = ExtSpline.Bezier1(pos - indexA,
Waypoints[indexA].Roll, m_ControlPoints1[indexA].Roll,
m_ControlPoints2[indexA].Roll, Waypoints[indexB].Roll);
}
Vector3 fwd = EvaluateTangent(pos);
if (!fwd.AlmostZero())
{
Vector3 up = transform.rotation * Vector3.up;
Quaternion q = Quaternion.LookRotation(fwd, up);
result = q * Quaternion.AngleAxis(roll, Vector3.forward);
}
}
return(result);
}
