private IEnumerator AnimateCamera(Vector3 position, Quaternion rotation, Vector3 pivot)
{
var angle = rotation.AngleTo(_rotation);
var totalTimeAngle = (0.1f * angle) / 90;
var totalTimeDistance = (pivot - _pivot).Length() * 0.003;
var totalTime = (float)Math.Max(totalTimeAngle, totalTimeDistance);
Debug.WriteLine($"time angle: {totalTimeAngle} time dist {totalTimeDistance}");
var time = 0.0f;
var originalPivot = _pivot;
var originalRotation = _rotation;
var targetRotation = rotation;
var distanceFromOrigin = (_position - _pivot).Length();
while (time < totalTime)
{
var lerpFactor = time / totalTime;
var newPivot = Vector3.Lerp(originalPivot, pivot, lerpFactor);
var newRotation = Quaternion.Slerp(originalRotation, targetRotation, lerpFactor);
var newUnitPosition = Vector3.Transform(-Vector3.UnitZ, newRotation);
var newPosition = newPivot + newUnitPosition * distanceFromOrigin;
MoveCamera(newPosition, newRotation, newPivot);
time += (float)_coroutines.DeltaTime;
yield return(null);
}
MoveCamera(position, rotation, pivot);
}
private void InterpolateKeys(double animationTime, AnimationLayer layer, ref Quaternion rotation, ref Vector3 translation, ref Vector3 scale, PRSKey prsKey, PRSKey nextPrsKey)
{
var nextTime = (nextPrsKey.Time < prsKey.Time
? (nextPrsKey.Time + Animation.Duration)
: nextPrsKey.Time);
var blend = ( float )(animationTime / nextTime);
if (prsKey.HasRotation)
{
rotation = Quaternion.Slerp(prsKey.Rotation, nextPrsKey.Rotation, blend);
}
if (prsKey.HasPosition)
{
translation = Vector3.Lerp(prsKey.Position * layer.PositionScale,
nextPrsKey.Position * layer.PositionScale,
blend);
}
if (prsKey.HasScale)
{
scale = Vector3.Lerp(prsKey.Scale * layer.ScaleScale,
nextPrsKey.Scale * layer.ScaleScale,
blend);
}
}
