///<summary>
///Create a GameObject for each Tile with a defined type and thus potentially a prefab.
///</summary>
static void CreateTileObjects(
Map map,
Map.Layer layer,
Map.Layer.Chunk chunk,
GameObject layerObject
)
{
var chunkPosition = new Vector3Int(chunk.x, layer.height - chunk.height - chunk.y, 0);
for (var k = 0; k < chunk.gids.Length; ++k)
{
var gid = chunk.gids[k];
var tile = map.tiles[gid & 0x1ffffff];
if (!tile?.prefab)
{
continue;
}
// The 3 most significant bits indicate in what way the tile should be flipped.
var diagonal = (gid >> 29) & 1;
var vertical = (gid >> 30) & 1;
var horizontal = (gid >> 31) & 1;
var position = chunkPosition + new Vector3Int(k % chunk.width, k / chunk.width, 0);
// Since a tile's GameObject is instantiated automatically in Edit Mode and *again*
// in Play Mode, we can't use the built in approach, and instead have to
// handle instantiation ourselves to avoid duplicate GameObjects.
var gameObject = PrefabUtility.InstantiatePrefab(
tile.prefab, layerObject.transform
) as GameObject;
if (gameObject)
{
gameObject.name += $" {position.x},{position.y}";
gameObject.transform.localPosition = position;
if (vertical == 1)
{
gameObject.transform.localRotation *= Quaternion.Euler(180f, 0f, 0f);
gameObject.transform.localPosition -= gameObject.transform.up;
}
if (horizontal == 1)
{
gameObject.transform.localRotation *= Quaternion.Euler(0f, 180f, 0f);
gameObject.transform.localPosition -= gameObject.transform.right;
}
if (diagonal == 1)
{
gameObject.transform.localRotation *=
Quaternion.AngleAxis(180f, new Vector3(-1f, 1f, 0f));
gameObject.transform.localPosition -= gameObject.transform.up;
gameObject.transform.localPosition -= gameObject.transform.right;
}
foreach (var component in gameObject.GetComponentsInChildren <MonoBehaviour>())
{
Property.Apply(tile.properties, component);
}
}
}
}
///<summary>
///Get an array of all tiles in a chunk.
///</summary>
static Tile[] GetTiles(Map map, Map.Layer layer, Map.Layer.Chunk chunk)
{
var tiles = new Tile[chunk.gids.Length];
for (var k = 0; k < tiles.Length; ++k)
{
tiles[k] = map.tiles[chunk.gids[k] & 0x1ffffff];
}
return(tiles);
}
///<summary>
///Flip all tiles in a chunk according to their 3 most significant flip bits, if any.
///</summary>
static void FlipTiles(Tilemap tilemap, Map.Layer layer, Map.Layer.Chunk chunk)
{
var chunkPosition = new Vector3Int(chunk.x, layer.height - chunk.height - chunk.y, 0);
for (var k = 0; k < chunk.gids.Length; ++k)
{
var gid = chunk.gids[k];
// The 3 most significant bits indicate in what way the tile should be flipped.
if (gid >> 29 == 0)
{
continue;
}
var diagonal = (gid >> 29) & 1;
var vertical = (gid >> 30) & 1;
var horizontal = (gid >> 31) & 1;
var position = chunkPosition + new Vector3Int(k % chunk.width, k / chunk.width, 0);
var rotation = Quaternion.identity;
// Flip tiles along X, Y, and diagonally based on the flip flags.
if (vertical == 1)
{
rotation *= Quaternion.Euler(180f, 0f, 0f);
}
if (horizontal == 1)
{
rotation *= Quaternion.Euler(0f, 180f, 0f);
}
if (diagonal == 1)
{
rotation *= Quaternion.AngleAxis(180f, new Vector3(-1f, 1f, 0f));
}
var transform = Matrix4x4.TRS(pos: Vector3.zero, rotation, s: Vector3.one);
tilemap.SetTransformMatrix(position, transform);
}
}