/// <summary>
/// Returns lod points for given octree depth/front, where level 0 is the root node.
/// Front will include leafs higher up than given level.
/// </summary>
public static IEnumerable <Chunk> QueryPointsInOctreeLevel(
this IPointCloudNode node, int level
)
{
if (level < 0)
{
yield break;
}
if (level == 0 || node.IsLeaf())
{
var ps = node.PositionsAbsolute;
var cs = node?.TryGetColors4b()?.Value;
if (ps != null && cs != null && ps.Length != cs.Length)
{
cs = new C4b[ps.Length];
Report.Warn("[Chunk] inconsistent length: pos.length = {0} vs cs.length = {1}", ps.Length, cs.Length);
}
var ns = node?.TryGetNormals3f()?.Value;
var js = node?.TryGetIntensities()?.Value;
var ks = node?.TryGetClassifications()?.Value;
var chunk = new Chunk(ps, cs, ns, js, ks);
yield return(chunk);
}
else
{
if (node.Subnodes == null)
{
yield break;
}
for (var i = 0; i < 8; i++)
{
var n = node.Subnodes[i];
if (n == null)
{
continue;
}
foreach (var x in QueryPointsInOctreeLevel(n.Value, level - 1))
{
yield return(x);
}
}
}
}
/// <summary>
/// Returns lod points for given octree depth/front of cells intersecting given bounds, where level 0 is the root node.
/// Front will include leafs higher up than given level.
/// </summary>
public static IEnumerable <Chunk> QueryPointsInOctreeLevel(
this IPointCloudNode node, int level, Box3d bounds
)
{
if (level < 0)
{
yield break;
}
if (!node.BoundingBoxExactGlobal.Intersects(bounds))
{
yield break;
}
if (level == 0 || node.IsLeaf())
{
var ps = node.PositionsAbsolute;
var cs = node?.TryGetColors4b()?.Value;
var ns = node?.TryGetNormals3f()?.Value;
var js = node?.TryGetIntensities()?.Value;
var ks = node?.TryGetClassifications()?.Value;
var chunk = new Chunk(ps, cs, ns, js, ks);
yield return(chunk);
}
else
{
if (node.Subnodes == null)
{
yield break;
}
for (var i = 0; i < 8; i++)
{
var n = node.Subnodes[i];
if (n == null)
{
continue;
}
foreach (var x in QueryPointsInOctreeLevel(n.Value, level - 1, bounds))
{
yield return(x);
}
}
}
}