void InitCSGTree()
{
csgTree = CSGUtility.LoadTree("import.xml", out instanceNodes);
if (csgTree == null)
{
MessageBox.Show("Failed to load file");
return;
}
instanceNodeTranslations = new List <Vector3>();
if (instanceNodes != null &&
instanceNodes.Count > 0)
{
foreach (var node in instanceNodes)
{
instanceNodeTranslations.Add(node.LocalTranslation);
}
subInstanceBrushes = new HashSet <CSGNode>();
foreach (var node in instanceNodes)
{
foreach (var brush in CSGUtility.FindChildBrushes(node))
{
subInstanceBrushes.Add(brush);
}
}
allBrushes = (from node in
CSGUtility.FindChildBrushes(csgTree)
where !subInstanceBrushes.Contains(node)
select node).ToList();
}
else
{
allBrushes = CSGUtility.FindChildBrushes(csgTree).ToList();
}
var updateNodes = new List <CSGNode>();
updateNodes.AddRange(allBrushes);
updateNodes.AddRange(instanceNodes);
UpdateMeshes(csgTree, updateNodes);
}