/// <summary>
/// Creates chunk at given world position, if chunk already exists, the current chunk is being returned
/// and no voxel/mesh generation is required.
/// </summary>
/// <param name="worldPosition">The world position.</param>
/// <returns>The created/found chunk.</returns>
public VoxelTerrainChunk CreateChunk(Vector3Int worldPosition)
{
var chunkMap = FindOrAddChunkMap(worldPosition);
// Try to find chunk first
var chunk = chunkMap.GetChunk(worldPosition);
if (chunk != null)
{
// Queue for mesh generation
if (chunk.HasVoxels && !chunk.HasMesh)
{
VoxelTerrainChunkGenerator.EnqueueMeshGeneration(chunk);
}
return(chunk);
}
// Create temporary test chunk
chunk = new VoxelTerrainChunk(this, worldPosition);
chunkMap.SetChunk(chunk, worldPosition);
// Generate whole chunk, this probably will also generate all neighbors
VoxelTerrainChunkGenerator.EnqueueGeneration(chunk);
return(chunk);
}
public bool Contains(VoxelTerrainChunk chunk)
{
lock (_cache)
{
return(_cache.Count(x => x.Chunk == chunk) != 0);
}
}
public void Remove(VoxelTerrainChunk chunk)
{
lock (_cache)
{
var entry = _cache.FirstOrDefault(x => x.Chunk == chunk);
_cache.Remove(entry);
}
}
internal void UpdateNeighbors()
{
Neighbors = new VoxelTerrainChunk[NeighborChunkDirections.Length];
for (var i = 0; i < NeighborChunkDirections.Length; i++)
{
Neighbors[i] = _terrainMap.FindChunk(WorldPosition + NeighborChunkDirections[i] * Width);
}
}
/// <summary>
/// Destroys given chunk. Must be called from main thread.
/// </summary>
/// <param name="chunk">The chunk which will be destroyed.</param>
public void DestroyChunkNow(VoxelTerrainChunk chunk)
{
// Check if this chunk should be always loaded, if true, leave it as-is.
if (!chunk.CanUnload)
{
return;
}
Object.Destroy(chunk.Actor);
}
public void Add(VoxelTerrainChunk chunk)
{
lock (_cache)
{
_cache.Add(new CacheEntry
{
CacheTime = DateTime.Now,
Chunk = chunk
});
}
}
/// <summary>
/// Destroys given chunk after cache time. Must be called from main thread.
/// </summary>
/// <param name="chunk">The chunk which will be destroyed.</param>
public void DestroyChunk(VoxelTerrainChunk chunk)
{
// Destroy chunk now, when cache time less or equal to 0.
if (VoxelTerrainManager.Current.MaxChunkCacheTime <= 0)
{
DestroyChunkNow(chunk);
return;
}
// Hide chunk
chunk.Hide();
// Check if this chunk should be always loaded, if true, skip caching and leave it as-is.
if (!chunk.CanUnload)
{
return;
}
// Add chunk to cache
_chunkCache.Add(chunk);
}
/// <summary>
/// Sets chunk at given world position (will be snapped to chunk offset position).
/// </summary>
/// <param name="chunk">The chunk instance.</param>
/// <param name="worldPosition">The world position.</param>
public void SetChunk(VoxelTerrainChunk chunk, Vector3Int worldPosition)
{
var offset = WorldToLocalChunk(worldPosition);
Chunks[offset.X, offset.Y, offset.Z] = chunk;
}