public OctreeCell(OctreeCell parent,
Vector3 childPos,
float halfDimension,
List <OctreePoint> potentialItems,
int subdivisions)
{
Parent = parent;
m_position = childPos;
m_halfDimension = halfDimension;
m_subdivisions = subdivisions;
m_bounds = new Bounds(m_position, Vector3.one * halfDimension * 2f);
foreach (var item in potentialItems)
{
ProcessPoint(item);
}
}
private void Subdivide()
{
if (m_subdivisions == 0)
{
return;
}
//remove this cell from all contained point
//because it will be subdivided
foreach (var octreePoint in ContainedPoints)
{
octreePoint.Cells.Remove(this);
}
//create upper cells
var extents = m_bounds.extents / 2f;
for (var i = 0; i < 4; i++)
{
var childPosition = m_position + extents;
m_childCells[i] =
new OctreeCell(this, childPosition, m_halfDimension / 2, ContainedPoints,
m_subdivisions - 1);
extents = Quaternion.Euler(0f, -90f, 0f) * extents;
}
//create lower cells
extents = m_bounds.extents / 2f;
extents.y = -extents.y;
for (var i = 4; i < 8; i++)
{
var childPosition = m_position + extents;
m_childCells[i] =
new OctreeCell(this, childPosition, m_halfDimension / 2, ContainedPoints,
m_subdivisions - 1);
extents = Quaternion.Euler(0f, -90f, 0f) * extents;
}
ContainedPoints.Clear();
}
