public void MoveItem(Vector3Int origin, Direction2D direction, Transform item)
{
ItemMovement2D movement = new ItemMovement2D(origin, direction, item);
ItemMovements.Add(movement);
movementLookup[origin] = movement;
// Check for special case of two conveyors facing each other
if (movementLookup.TryGetValue(movement.Destination, out var destMovement) && destMovement.Destination == movement.Origin)
{
BlockMovement(movement.Origin);
BlockMovement(movement.Destination);
}
}
// Evaluate movements & Write output
void LateUpdate()
{
if (!TickInfo.Ticking)
{
return;
}
// Evaluate movements
foreach (var movement in ItemMovements)
{
// If there is no belt in the destination, we're blocked
if (!belts.ContainsKey(movement.Destination))
{
BlockMovement(movement.Origin);
continue;
}
// If there is a belt, check for blocking
if (movementLookup.TryGetValue(movement.Destination, out var aheadMovement))
{
if (aheadMovement.Blocked)
{
//print("Ahead is blocked (origin: " + movement.Origin + ")");
BlockMovement(movement.Origin);
}
else
{
//print("Adding dependency from " + movement.Origin + " to " + movement.Destination);
movementDependency.Add(movement.Origin, movement.Destination);
}
}
// Check priority
if (!movement.Blocked)
{
var center = movement.Destination;
var centerBelt = belts[center];
//print($"Center: {center}");
// Get surrounding positions in order of priority
var behind = center + centerBelt.Direction.Opposite().Vector3Int();
var clockwise = center + centerBelt.Direction.Clockwise().Vector3Int();
var counterClockwise = center + centerBelt.Direction.CounterClockwise().Vector3Int();
var front = center + centerBelt.Direction.Vector3Int();
ItemMovement2D[] priorityMovements = new ItemMovement2D[4];
priorityMovements[0] = movementLookup.ContainsKey(behind) ? movementLookup[behind] : null;
priorityMovements[1] = movementLookup.ContainsKey(clockwise) ? movementLookup[clockwise] : null;
priorityMovements[2] = movementLookup.ContainsKey(counterClockwise) ? movementLookup[counterClockwise] : null;
priorityMovements[3] = movementLookup.ContainsKey(front) ? movementLookup[front] : null;
bool foundGoodMovement = false;
for (int i = 0; i < 4; i++)
{
if (priorityMovements[i] == null || priorityMovements[i].Destination != center)
{
continue;
}
if (!foundGoodMovement && !priorityMovements[i].Blocked)
{
foundGoodMovement = true;
}
else
{
BlockMovement(priorityMovements[i].Origin);
}
}
}
}
// Write output
foreach (var movement in ItemMovements)
{
var belt = belts[movement.Origin];
belt.Moving = !movement.Blocked;
}
}
