public void EditDensity(Func <Vector3, float, float> editor)
{
// Do a breadth-first search through the graph for chunks that changed
// as a result of applying the editor.
var queue = new Queue <Chunk>();
var visited = new Dictionary <ChunkPosition, Chunk>();
// Keep track of points where the solidity flipped.
var flippedPoints = new HashSet <GlobalPoint>();
queue.Enqueue(this);
visited.Add(position, this);
while (queue.Count > 0)
{
var current = queue.Dequeue();
var neighbourMask = current.EditDensityLocally(editor, ref flippedPoints);
for (int n = 0; n < 6; n++)
{
var bit = 0x1 << n;
if ((neighbourMask & bit) != 0)
{
var neighbour = current.neighbours[n];
if (neighbour != null)
{
if (!visited.ContainsKey(neighbour.position))
{
queue.Enqueue(neighbour);
visited.Add(neighbour.position, neighbour);
}
}
}
}
}
// Update the luminance in affected points
if (flippedPoints.Count >= 1)
{
luminance.UpdateAt(ref flippedPoints);
}
}
