public static bool TryEndNode(ref PathfindingNode endNode, PathfindingArgs pathfindingArgs)
{
if (!Traversable(pathfindingArgs.CollisionMask, pathfindingArgs.Access, endNode))
{
if (pathfindingArgs.Proximity > 0.0f)
{
// TODO: Should make this account for proximities,
// probably some kind of breadth-first search to find a valid one
foreach (var node in endNode.GetNeighbors())
{
if (Traversable(pathfindingArgs.CollisionMask, pathfindingArgs.Access, node))
{
endNode = node;
return(true);
}
}
}
return(false);
}
return(true);
}
public static bool DirectionTraversable(int collisionMask, ICollection <string> access, PathfindingNode currentNode, Direction direction)
{
// If it's a diagonal we need to check NSEW to see if we can get to it and stop corner cutting, NE needs N and E etc.
// Given there's different collision layers stored for each node in the graph it's probably not worth it to cache this
// Also this will help with corner-cutting
PathfindingNode northNeighbor = null;
PathfindingNode southNeighbor = null;
PathfindingNode eastNeighbor = null;
PathfindingNode westNeighbor = null;
foreach (var neighbor in currentNode.GetNeighbors())
{
if (neighbor.TileRef.X == currentNode.TileRef.X &&
neighbor.TileRef.Y == currentNode.TileRef.Y + 1)
{
northNeighbor = neighbor;
continue;
}
if (neighbor.TileRef.X == currentNode.TileRef.X + 1 &&
neighbor.TileRef.Y == currentNode.TileRef.Y)
{
eastNeighbor = neighbor;
continue;
}
if (neighbor.TileRef.X == currentNode.TileRef.X &&
neighbor.TileRef.Y == currentNode.TileRef.Y - 1)
{
southNeighbor = neighbor;
continue;
}
if (neighbor.TileRef.X == currentNode.TileRef.X - 1 &&
neighbor.TileRef.Y == currentNode.TileRef.Y)
{
westNeighbor = neighbor;
continue;
}
}
switch (direction)
{
case Direction.NorthEast:
if (northNeighbor == null || eastNeighbor == null)
{
return(false);
}
if (!Traversable(collisionMask, access, northNeighbor) ||
!Traversable(collisionMask, access, eastNeighbor))
{
return(false);
}
break;
case Direction.NorthWest:
if (northNeighbor == null || westNeighbor == null)
{
return(false);
}
if (!Traversable(collisionMask, access, northNeighbor) ||
!Traversable(collisionMask, access, westNeighbor))
{
return(false);
}
break;
case Direction.SouthWest:
if (southNeighbor == null || westNeighbor == null)
{
return(false);
}
if (!Traversable(collisionMask, access, southNeighbor) ||
!Traversable(collisionMask, access, westNeighbor))
{
return(false);
}
break;
case Direction.SouthEast:
if (southNeighbor == null || eastNeighbor == null)
{
return(false);
}
if (!Traversable(collisionMask, access, southNeighbor) ||
!Traversable(collisionMask, access, eastNeighbor))
{
return(false);
}
break;
}
return(true);
}
