private void AddAllTrianglesInChildren(OctMeshTreeSearch search,
ref TreeNode node,
Vector3 center,
Vector3 extents)
{
if (node.m_triangles != null && 0 < node.m_triangles.Length)
{
search.AddTriangles(node.m_triangles, center, extents);
}
else if (0 <= node.m_childIndex)
{
var childIndex = node.childIndex;
var collapseFlags = node.collapseFlags;
for (var i = 0; i < 8; ++i)
{
if ((collapseFlags & i) == 0)
{
AddAllTrianglesInChildren(search, ref m_treeNodes[childIndex++], center, extents);
}
}
}
}
private void Search(OctMeshTreeSearch search, ref TreeNode node, Vector3 center, Vector3 extents)
{
var noTriangles = (node.m_triangles == null || node.m_triangles.Length == 0);
if (node.childIndex < 0 && noTriangles)
{
return;
}
bool isPartial;
var flags = search.IsInView(center, extents, out isPartial);
if (flags == 0)
{
return;
}
if (isPartial && 0 <= node.m_childIndex)
{
var childIndex = node.childIndex;
var collapseFlags = node.collapseFlags;
var halfExtents = extents;
if (collapseFlags != 0)
{
if ((collapseFlags & 0x1) != 0)
{
flags = (flags | (flags >> 1)) & OctMeshTreeSearch.FLAGS_LEFT;
}
else
{
halfExtents.x *= 0.5f;
}
if ((collapseFlags & 0x2) != 0)
{
flags = (flags | (flags >> 2)) & OctMeshTreeSearch.FLAGS_BOTTOM;
}
else
{
halfExtents.y *= 0.5f;
}
if ((collapseFlags & 0x4) != 0)
{
flags = (flags | (flags >> 4)) & OctMeshTreeSearch.FLAGS_FRONT;
}
else
{
halfExtents.z *= 0.5f;
}
}
else
{
halfExtents *= 0.5f;
}
center = center - extents + halfExtents;
for (var i = 0; i < 8 && flags != 0; ++i, flags >>= 1)
{
if ((collapseFlags & i) == 0)
{
if ((flags & 1) != 0)
{
var p = center;
if ((i & 1) != 0)
{
p.x += extents.x;
}
if ((i & 2) != 0)
{
p.y += extents.y;
}
if ((i & 4) != 0)
{
p.z += extents.z;
}
if (0 <= m_treeNodes[childIndex].m_childIndex)
{
Search(search, ref m_treeNodes[childIndex], p, halfExtents);
}
else if (m_treeNodes[childIndex].m_triangles != null)
{
search.AddTriangles(m_treeNodes[childIndex].m_triangles, p, halfExtents);
}
}
++childIndex;
}
}
}
else
{
if (noTriangles)
{
var childIndex = node.childIndex;
var collapseFlags = node.collapseFlags;
for (var i = 0; i < 8; ++i)
{
if ((collapseFlags & i) == 0)
{
AddAllTrianglesInChildren(search, ref m_treeNodes[childIndex++], center, extents);
}
}
}
else
{
search.AddTriangles(node.m_triangles, center, extents);
}
}
}
