/** \param removeOld: Remove terrains that are not in the collector. */
private void AddTerrains(Collector collector, bool removeOld = false)
{
// Get new nodes
HashSet <Vector2Int> toRemove = new HashSet <Vector2Int>(_terrains.Keys);
foreach (var nodeName in collector.GetNewNodes())
{
var node = collector.GetNode(nodeName);
string terrainName = node.Mesh;
IntPtr terrainHandle = collector.GetTerrainHandle(terrainName);
if (terrainHandle != IntPtr.Zero)
{
// get bbox
BBox bbox = Terrains.terrainGetBBox(terrainHandle);
double size = bbox.xmax - bbox.xmin;
var coords = new Vector2Int((int)(bbox.xmin / size), (int)(bbox.ymin / size));
if (!_terrains.ContainsKey(coords))
{
GameObject terrainGO = new GameObject("Terrain " + coords);
#if UNITY_EDITOR
Undo.RegisterCreatedObjectUndo(terrainGO, "Added terrain");
#endif
terrainGO.transform.SetParent(transform);
var worldTerrain = terrainGO.AddComponent <WorldTerrain>();
worldTerrain.terrainSystem = this;
worldTerrain.coords = coords;
var terrain = terrainGO.AddComponent <Terrain>();
terrain.materialTemplate = materialTemplate;
terrain.terrainData = new TerrainData();
terrainGO.AddComponent <TerrainCollider>().terrainData = terrain.terrainData;
Terrains.ReadTerrainData(terrain.terrainData, terrainHandle);
Terrains.ReadTerrainTextures(terrain, terrainHandle, collector, _cacheLocation);
Terrains.UpdateTerrainBBox(terrain, bbox);
_terrainGOs.Add(coords, terrainGO);
_terrains.Add(coords, terrain);
}
else
{
toRemove.Remove(coords);
}
}
}
if (removeOld)
{
foreach (var key in toRemove)
{
DeleteTerrain(key);
}
}
UpdateNeighbours();
}
internal static void UpdateTerrainBBox(Terrain terrain, BBox bbox)
{
TerrainData tData = terrain.terrainData;
tData.size = new Vector3(
(float)(bbox.xmax - bbox.xmin),
(float)(bbox.zmax - bbox.zmin),
(float)(bbox.ymax - bbox.ymin)
);
terrain.transform.position = new Vector3((float)bbox.xmin, (float)bbox.zmin, (float)bbox.ymin);
}