/// <summary>
/// Interpolate quaternion from Current to Target. Scaled by angle to Target, so it has a strong start speed and ease out.
/// </summary>
public static FQuat QInterpTo(FQuat current, FQuat target, float deltaTime, float interpSpeed)
{
// If no interp speed, jump to target value
if (interpSpeed <= 0.0f)
{
return(target);
}
// If the values are nearly equal, just return Target and assume we have reached our destination.
if (current.Equals(target))
{
return(target);
}
return(FQuat.Slerp(current, target, FMath.Clamp(interpSpeed * deltaTime, 0.0f, 1.0f)));
}
/// <summary>
/// Interpolate quaternion from Current to Target with constant step (in radians)
/// </summary>
public static FQuat QInterpConstantTo(FQuat current, FQuat target, float deltaTime, float interpSpeed)
{
// If no interp speed, jump to target value
if (interpSpeed <= 0.0f)
{
return(target);
}
// If the values are nearly equal, just return Target and assume we have reached our destination.
if (current.Equals(target))
{
return(target);
}
float deltaInterpSpeed = FMath.Clamp(deltaTime * interpSpeed, 0.0f, 1.0f);
float angularDistance = FMath.Max(SmallNumber, target.AngularDistance(current));
float alpha = FMath.Clamp(deltaInterpSpeed / angularDistance, 0.0f, 1.0f);
return(FQuat.Slerp(current, target, alpha));
}
// Quat-specific interpolation
/// <summary>
/// Performs a linear interpolation between two values, Alpha ranges from 0-1
/// </summary>
public static FQuat Lerp(FQuat a, FQuat b, float alpha)
{
return(FQuat.Slerp(a, b, alpha));
}