public void BlockMovement(Vector3Int origin)
{
//print("Blocking " + origin);
var movement = movementLookup[origin];
if (movement.Blocked)
{
return;
}
// Keep a stack of blocks that need to be checked
Stack <Vector3Int> originsToBeProcessed = new Stack <Vector3Int>(64);
originsToBeProcessed.Push(origin);
movement.Blocked = true;
// Process all blocks in chain
while (originsToBeProcessed.Count > 0)
{
// Pop movement off the stack
origin = originsToBeProcessed.Pop();
movement = movementLookup[origin];
// Check for blocking in each direction
foreach (var dir in DirectionExtensions.Directions())
{
// Ignore blocking in the direction we're going
if (movement.Direction == dir)
{
continue;
}
//print("Checking " + (origin + dir.Vector3Int()));
var behindOrigin = origin + dir.Vector3Int();
if (movementDependency.ContainsKey(behindOrigin))
{
var behindMovement = movementLookup[behindOrigin];
//print("Found dependency: " + behindMovement.Direction + " " + behindMovement.Blocked + " " + dir.Opposite());
// If it's moving to us, then it needs to be blocked
if (behindMovement.Direction == dir.Opposite() && !behindMovement.Blocked)
{
//print("Blocking " + behindOrigin);
behindMovement.Blocked = true;
originsToBeProcessed.Push(behindOrigin);
}
}
}
}
}