private void GetChunksIntersecting(BoundingFrustum Frustum, HashSet <VoxelChunk> chunks)
{
chunks.Clear();
var frustumBox = MathFunctions.GetBoundingBox(Frustum.GetCorners());
var minChunk = ChunkData.ConfineToBounds(GlobalVoxelCoordinate.FromVector3(frustumBox.Min).GetGlobalChunkCoordinate());
var maxChunk = ChunkData.ConfineToBounds(GlobalVoxelCoordinate.FromVector3(frustumBox.Max).GetGlobalChunkCoordinate());
for (var x = minChunk.X; x <= maxChunk.X; ++x)
{
for (var y = minChunk.Y; y <= maxChunk.Y; ++y)
{
for (var z = minChunk.Z; z <= maxChunk.Z; ++z)
{
var chunkCoord = new GlobalChunkCoordinate(x, y, z);
var min = new GlobalVoxelCoordinate(chunkCoord, new LocalVoxelCoordinate(0, 0, 0));
var box = new BoundingBox(min.ToVector3(), min.ToVector3() + new Vector3(VoxelConstants.ChunkSizeX, VoxelConstants.ChunkSizeY, VoxelConstants.ChunkSizeZ));
if (Frustum.Contains(box) != ContainmentType.Disjoint)
{
chunks.Add(ChunkData.GetChunk(chunkCoord));
}
}
}
}
}