void UpdateIndex(int i)
{
Entity entity = manager.entities[i];
//Blend between previous and current states.
//Interpolated updates occur after proper updates complete.
//That means that the internal positions and the front buffer positions are equivalent.
//However, the backbuffer is uncontested and contains the previous frame's data.
Vector3Ex.Lerp(ref manager.ReadBuffers.backBuffer[i].Position, ref entity.position, blendAmount, out backBuffer[i].Position);
QuaternionEx.Slerp(ref manager.ReadBuffers.backBuffer[i].Orientation, ref entity.orientation, blendAmount, out backBuffer[i].Orientation);
}
/// <summary>
/// Evaluates the curve section starting at the control point index using
/// the weight value.
/// </summary>
/// <param name="controlPointIndex">Index of the starting control point of the subinterval.</param>
/// <param name="weight">Location to evaluate on the subinterval from 0 to 1.</param>
/// <param name="value">Value at the given location.</param>
public override void Evaluate(int controlPointIndex, float weight, out System.Numerics.Vector3 value)
{
value = Vector3Ex.Lerp(ControlPoints[controlPointIndex].Value, ControlPoints[controlPointIndex + 1].Value, weight);
}
