// Update the neighbor in a given relative direction.
private void UpdateNeighborAt(int deltaX, int deltaZ)
{
WallTile wallTile = WallTileAtDelta(deltaX, deltaZ);
if (wallTile != null)
{
wallTile.UpdateWall();
}
}
// Updates the spawned wall being used, with regards to neighboring wall tiles.
public void UpdateWall()
{
WallTile left = WallTileAtDelta(-1, 0);
WallTile right = WallTileAtDelta(1, 0);
WallTile up = WallTileAtDelta(0, 1);
WallTile down = WallTileAtDelta(0, -1);
int count =
(left != null ? 1 : 0) + (right != null ? 1 : 0) +
(up != null ? 1 : 0) + (down != null ? 1 : 0);
float yRotation = 0.0f;
switch (count)
{
case 0:
// If by yourself, use a single tile.
SpawnWall(SinglePrefab, 180.0f);
break;
case 1:
// If only one neighbor, rotate so that the edge touches that neighbor.
if (up != null)
{
yRotation = 180.0f;
}
else if (left != null)
{
yRotation = 90.0f;
}
else if (right != null)
{
yRotation = 270.0f;
}
SpawnWall(SinglePrefab, yRotation);
break;
case 2:
GameObject prefab;
if (up == down || left == right)
{
// If two neighbors, that are directly across from eachother,
// use a straight piece that connects the two.
prefab = SinglePrefab;
if (left != null)
{
yRotation = 90.0f;
}
}
else
{
// Otherwise, use a corner piece, oriented to touch the two neighbors.
if (up != null)
{
if (left != null)
{
yRotation = 90.0f;
}
else
{
yRotation = 180.0f;
}
}
else if (right != null)
{
yRotation = 270.0f;
}
prefab = CornerPrefab;
}
SpawnWall(prefab, yRotation);
break;
case 3:
// With three neighbors, orient so that the flat edge is towards the missing one.
if (right == null)
{
yRotation = 90.0f;
}
else if (down == null)
{
yRotation = 180.0f;
}
else if (left == null)
{
yRotation = 270.0f;
}
SpawnWall(TTurnPrefab, yRotation);
break;
case 4:
// With four neighbors, connect to all four.
SpawnWall(JunctionPrefab, yRotation);
break;
}
}