private bool CanDoTransition(LinkedAvidNode currentNode, AvidModelLink proposedLink, AvidPathingOptions options)
{
if (!proposedLink.IsDiagonal && !proposedLink.IsPolarDiagonal)
{
return(true);
}
//if (currentNode.NodeDepth == 5 && currentNode.Window.Direction == AvidDirection.CD && currentNode.Window.Ring == AvidRing.Blue)
//{
// var result = TracePath(currentNode, null, null);
// if (result.PathNodes[2].Window.Direction == AvidDirection.B && result.PathNodes[2].Window.Ring == AvidRing.Blue)
// {
// }
//}
switch (options)
{
case AvidPathingOptions.DiagonalTransitionsIgnored:
return(!proposedLink.IsDiagonal);
case AvidPathingOptions.DiagonalTransitionsUnlimited:
return(true);
case AvidPathingOptions.DiagonalTransitionsTotalLimit:
return(!proposedLink.IsDiagonal || currentNode.TotalDiagonalTransitions < (currentNode.NodeDistance / 2 + 1) / 6 + 1);
case AvidPathingOptions.DiagonalTransitionsLimitPerHemisphere:
return(!proposedLink.IsDiagonal ||
proposedLink.IsAbovePlane ?
currentNode.UpperHemisphereDiagonalTransitions < (currentNode.DistanceAbovePlane / 2 + 1) / 6 + 1 :
currentNode.LowerHemisphereDiagonalTransitions < (currentNode.DistanceBelowPlane / 2 + 1) / 6 + 1);
case AvidPathingOptions.DiagonalTransitionsLimitWithPolar:
if (proposedLink.IsDiagonal)
{
if (currentNode.TotalDiagonalTransitions > 0 && currentNode.TotalDiagonalTransitions >= 2)
{
return(false);
}
return(proposedLink.IsAbovePlane ?
currentNode.UpperHemisphereDiagonalTransitions < (currentNode.DistanceAbovePlane / 2 + 1) / 6 + 1 :
currentNode.LowerHemisphereDiagonalTransitions < (currentNode.DistanceBelowPlane / 2 + 1) / 6 + 1);
}
if (proposedLink.IsPolarDiagonal)
{
int currentPolarDiagonalTransitionLimit = (currentNode.NodeDistance / 2 + 1) / 6 + 1;
// First transition is always available;
return(currentNode.TotalPolarDiagonalTransitions == 0 ||
// the second is only available as the sixth transition if the second diagonal transition has not been taken.
currentNode.TotalPolarDiagonalTransitions < currentPolarDiagonalTransitionLimit &&
currentNode.TotalDiagonalTransitions < 2);
}
return(true);
default:
throw new ArgumentException(string.Format("Option not supported: {0}", options), "options");
}
}
public static string AvidLinkToString(AvidModelLink link)
{
return(string.Format("{0} -> {1} ({2}{3}:{4})",
link.EndpointA,
link.EndpointB,
link.IsDiagonal ? "Dg" : "St",
link.IsAbovePlane ? "+" : "-",
link.Weight));
}
