/// <summary>
/// Verifies <paramref name="action"/> is executed after setting the position of
/// <paramref name="positionable"/> to <paramref name="temporalPosition"/> and then
/// gets restored to <paramref name="originalPosition"/>.
/// </summary>
///
/// <remarks>
/// This should be called within a <see cref="Received.InOrder(Action)"/> block.
/// </remarks>
///
/// <param name="positionable">The posibionable to verify.</param>
/// <param name="originalPosition">The expected original position.</param>
/// <param name="temporalPosition">The expected temporal position.</param>
/// <param name="action">The action to be executed.</param>
public static void VerifyDoAtPosition(this IPositionable positionable, long originalPosition, long temporalPosition, Action action)
{
positionable.GetPosition();
positionable.SetPosition(temporalPosition);
action.Invoke();
positionable.SetPosition(originalPosition);
}
/// <summary>
/// Update any active transitions and move between lock states
/// </summary>
private void UpdateTransition(float elapsedTime)
{
// No Transition to update
if (mode == CameraMode.LockedPos || mode == CameraMode.LockedTarget)
{
return;
}
transitionRemaining -= elapsedTime;
if (transitionRemaining <= 0)
{
// End the transition
switch (mode)
{
case CameraMode.TtTTransition:
case CameraMode.VtTTransition:
//The new target is stored in target, simply change mode
mode = CameraMode.LockedTarget;
break;
case CameraMode.TtVTransition:
case CameraMode.VtVTransition:
//The new target is stored in targetPos, simply change mode
mode = CameraMode.LockedPos;
break;
}
}
else
{
// Transition is still going, update the transitionPosition
Vector2 initialPos, finalPos;
switch (mode)
{
case CameraMode.TtTTransition:
initialPos = oldTarget.GetPosition();
finalPos = target.GetPosition();
break;
case CameraMode.VtTTransition:
initialPos = oldTargetPos;
finalPos = target.GetPosition();
break;
case CameraMode.TtVTransition:
initialPos = oldTarget.GetPosition();
finalPos = targetPos;
break;
case CameraMode.VtVTransition:
initialPos = oldTargetPos;
finalPos = targetPos;
break;
default:
initialPos = finalPos = Vector2.Zero;
break;
}
float pctTransitionRemaining = transitionRemaining / transitionTime;
float pctTransitionComplete = 1 - pctTransitionRemaining;
float powerPctComplete = (float)Math.Pow(pctTransitionComplete, 0.5);
Vector2 deltaPos = finalPos - initialPos;
transitionPos = initialPos + powerPctComplete * deltaPos;
}
}