// create a terrain map of ALL terrains, by using only their placement to fit them to a grid
// the position and size of originTerrain defines the grid alignment and origin. if NULL, we use the first active terrain
static public TerrainMap CreateFromPlacement(Vector2 gridOrigin, Vector2 gridSize, System.Predicate <Terrain> filter = null, bool fullValidation = true)
{
if ((Terrain.activeTerrains == null) || (Terrain.activeTerrains.Length == 0))
{
return(null);
}
TerrainMap terrainMap = new TerrainMap();
float gridScaleX = 1.0f / gridSize.x;
float gridScaleZ = 1.0f / gridSize.y;
// iterate all active terrains
foreach (Terrain terrain in Terrain.activeTerrains)
{
// some integration tests just create a terrain component without terrain data
if (terrain.terrainData == null)
{
continue;
}
if ((filter == null) || filter(terrain))
{
// convert position to a grid index, with proper rounding
Vector3 pos = terrain.transform.position;
int tileX = Mathf.RoundToInt((pos.x - gridOrigin.x) * gridScaleX);
int tileZ = Mathf.RoundToInt((pos.z - gridOrigin.y) * gridScaleZ);
// attempt to add the terrain at that grid position
terrainMap.TryToAddTerrain(tileX, tileZ, terrain);
}
}
// run validation to check alignment status
if (fullValidation)
{
terrainMap.Validate();
}
return((terrainMap.m_terrainTiles.Count > 0) ? terrainMap : null);
}
static public TerrainMap CreateFromConnectedNeighbors(Terrain originTerrain, System.Predicate <Terrain> filter = null, bool fullValidation = true)
{
if (originTerrain == null)
{
return(null);
}
if (originTerrain.terrainData == null)
{
return(null);
}
TerrainMap terrainMap = new TerrainMap();
Queue <QueueElement> todoQueue = new Queue <QueueElement>();
todoQueue.Enqueue(new QueueElement(0, 0, originTerrain));
int maxTerrains = Terrain.activeTerrains.Length;
while (todoQueue.Count > 0)
{
QueueElement cur = todoQueue.Dequeue();
if ((filter == null) || filter(cur.terrain))
{
if (terrainMap.TryToAddTerrain(cur.tileX, cur.tileZ, cur.terrain))
{
// sanity check to stop bad neighbors causing infinite iteration
if (terrainMap.m_terrainTiles.Count > maxTerrains)
{
break;
}
if (cur.terrain.leftNeighbor != null)
{
todoQueue.Enqueue(new QueueElement(cur.tileX - 1, cur.tileZ, cur.terrain.leftNeighbor));
}
if (cur.terrain.bottomNeighbor != null)
{
todoQueue.Enqueue(new QueueElement(cur.tileX, cur.tileZ - 1, cur.terrain.bottomNeighbor));
}
if (cur.terrain.rightNeighbor != null)
{
todoQueue.Enqueue(new QueueElement(cur.tileX + 1, cur.tileZ, cur.terrain.rightNeighbor));
}
if (cur.terrain.topNeighbor != null)
{
todoQueue.Enqueue(new QueueElement(cur.tileX, cur.tileZ + 1, cur.terrain.topNeighbor));
}
}
}
}
// run validation to check alignment status
if (fullValidation)
{
terrainMap.Validate();
}
return(terrainMap);
}
